../deps/v8/src/compiler/wasm-compiler.cc

Bug Summary

File:	out/../deps/v8/src/compiler/wasm-compiler.cc
Warning:	line 1879, column 3 Undefined or garbage value returned to caller
Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-unknown-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name wasm-compiler.cc -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/home/maurizio/node-v18.6.0/out -resource-dir /usr/local/lib/clang/16.0.0 -D _GLIBCXX_USE_CXX11_ABI=1 -D NODE_OPENSSL_CONF_NAME=nodejs_conf -D NODE_OPENSSL_HAS_QUIC -D V8_GYP_BUILD -D V8_TYPED_ARRAY_MAX_SIZE_IN_HEAP=64 -D __STDC_FORMAT_MACROS -D OPENSSL_NO_PINSHARED -D OPENSSL_THREADS -D V8_TARGET_ARCH_X64 -D V8_HAVE_TARGET_OS -D V8_TARGET_OS_LINUX -D V8_EMBEDDER_STRING="-node.8" -D ENABLE_DISASSEMBLER -D V8_PROMISE_INTERNAL_FIELD_COUNT=1 -D V8_SHORT_BUILTIN_CALLS -D OBJECT_PRINT -D V8_INTL_SUPPORT -D V8_ATOMIC_OBJECT_FIELD_WRITES -D V8_ENABLE_LAZY_SOURCE_POSITIONS -D V8_USE_SIPHASH -D V8_SHARED_RO_HEAP -D V8_WIN64_UNWINDING_INFO -D V8_ENABLE_REGEXP_INTERPRETER_THREADED_DISPATCH -D V8_SNAPSHOT_COMPRESSION -D V8_ENABLE_WEBASSEMBLY -D V8_ENABLE_JAVASCRIPT_PROMISE_HOOKS -D V8_ALLOCATION_FOLDING -D V8_ALLOCATION_SITE_TRACKING -D V8_SCRIPTORMODULE_LEGACY_LIFETIME -D V8_ADVANCED_BIGINT_ALGORITHMS -D UCONFIG_NO_SERVICE=1 -D U_ENABLE_DYLOAD=0 -D U_STATIC_IMPLEMENTATION=1 -D U_HAVE_STD_STRING=1 -D UCONFIG_NO_BREAK_ITERATION=0 -I ../deps/v8 -I ../deps/v8/include -I /home/maurizio/node-v18.6.0/out/Release/obj/gen/generate-bytecode-output-root -I /home/maurizio/node-v18.6.0/out/Release/obj/gen -I ../deps/icu-small/source/i18n -I ../deps/icu-small/source/common -internal-isystem /usr/lib/gcc/x86_64-redhat-linux/8/../../../../include/c++/8 -internal-isystem /usr/lib/gcc/x86_64-redhat-linux/8/../../../../include/c++/8/x86_64-redhat-linux -internal-isystem /usr/lib/gcc/x86_64-redhat-linux/8/../../../../include/c++/8/backward -internal-isystem /usr/local/lib/clang/16.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-redhat-linux/8/../../../../x86_64-redhat-linux/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -O3 -Wno-unused-parameter -Wno-return-type -std=gnu++17 -fdeprecated-macro -fdebug-compilation-dir=/home/maurizio/node-v18.6.0/out -ferror-limit 19 -fno-rtti -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2022-08-22-142216-507842-1 -x c++ ../deps/v8/src/compiler/wasm-compiler.cc
1// Copyright 2015 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.

5#include "src/compiler/wasm-compiler.h"

7#include <memory>

9#include "src/api/api-inl.h"
10#include "src/base/optional.h"
11#include "src/base/platform/elapsed-timer.h"
12#include "src/base/platform/platform.h"
13#include "src/base/platform/wrappers.h"
14#include "src/base/small-vector.h"
15#include "src/base/v8-fallthrough.h"
16#include "src/base/vector.h"
17#include "src/codegen/assembler-inl.h"
18#include "src/codegen/assembler.h"
19#include "src/codegen/code-factory.h"
20#include "src/codegen/compiler.h"
21#include "src/codegen/interface-descriptors-inl.h"
22#include "src/codegen/machine-type.h"
23#include "src/codegen/optimized-compilation-info.h"
24#include "src/compiler/backend/code-generator.h"
25#include "src/compiler/backend/instruction-selector.h"
26#include "src/compiler/common-operator.h"
27#include "src/compiler/compiler-source-position-table.h"
28#include "src/compiler/diamond.h"
29#include "src/compiler/fast-api-calls.h"
30#include "src/compiler/graph-assembler.h"
31#include "src/compiler/graph-visualizer.h"
32#include "src/compiler/graph.h"
33#include "src/compiler/int64-lowering.h"
34#include "src/compiler/linkage.h"
35#include "src/compiler/machine-operator.h"
36#include "src/compiler/node-matchers.h"
37#include "src/compiler/node-origin-table.h"
38#include "src/compiler/node-properties.h"
39#include "src/compiler/pipeline.h"
40#include "src/compiler/zone-stats.h"
41#include "src/execution/isolate-inl.h"
42#include "src/execution/simulator.h"
43#include "src/heap/factory.h"
44#include "src/logging/counters.h"
45#include "src/logging/log.h"
46#include "src/objects/heap-number.h"
47#include "src/objects/instance-type.h"
48#include "src/roots/roots.h"
49#include "src/tracing/trace-event.h"
50#include "src/trap-handler/trap-handler.h"
51#include "src/wasm/code-space-access.h"
52#include "src/wasm/function-body-decoder-impl.h"
53#include "src/wasm/function-compiler.h"
54#include "src/wasm/graph-builder-interface.h"
55#include "src/wasm/jump-table-assembler.h"
56#include "src/wasm/memory-tracing.h"
57#include "src/wasm/object-access.h"
58#include "src/wasm/wasm-code-manager.h"
59#include "src/wasm/wasm-constants.h"
60#include "src/wasm/wasm-engine.h"
61#include "src/wasm/wasm-limits.h"
62#include "src/wasm/wasm-linkage.h"
63#include "src/wasm/wasm-module.h"
64#include "src/wasm/wasm-objects-inl.h"
65#include "src/wasm/wasm-opcodes-inl.h"

67namespace v8 {
68namespace internal {
69namespace compiler {

71namespace {

73#define FATAL_UNSUPPORTED_OPCODE(opcode)        \
FATAL("Unsupported opcode 0x%x:%s", (opcode), \V8_Fatal("Unsupported opcode 0x%x:%s", (opcode), wasm::WasmOpcodes
::OpcodeName(opcode))
      wasm::WasmOpcodes::OpcodeName(opcode))V8_Fatal("Unsupported opcode 0x%x:%s", (opcode), wasm::WasmOpcodes
::OpcodeName(opcode));

77MachineType assert_size(int expected_size, MachineType type) {
DCHECK_EQ(expected_size, ElementSizeInBytes(type.representation()))((void) 0);
return type;
80}

82#define WASM_INSTANCE_OBJECT_SIZE(name)     \
(WasmInstanceObject::k##name##OffsetEnd - \
 WasmInstanceObject::k##name##Offset + 1)  // NOLINT(whitespace/indent)

86#define LOAD_MUTABLE_INSTANCE_FIELD(name, type)                          \
gasm_->LoadFromObject(                                                 \
    assert_size(WASM_INSTANCE_OBJECT_SIZE(name), type), GetInstance(), \
    wasm::ObjectAccess::ToTagged(WasmInstanceObject::k##name##Offset))

91#define LOAD_INSTANCE_FIELD(name, type)                                  \
gasm_->LoadImmutable(                                                  \
    assert_size(WASM_INSTANCE_OBJECT_SIZE(name), type), GetInstance(), \
    wasm::ObjectAccess::ToTagged(WasmInstanceObject::k##name##Offset))

96#define LOAD_INSTANCE_FIELD_NO_ELIMINATION(name, type)gasm_->Load( assert_size(WASM_INSTANCE_OBJECT_SIZE(name), type
), GetInstance(), wasm::ObjectAccess::ToTagged(WasmInstanceObject
::knameOffset))                   \
gasm_->Load(                                                           \
    assert_size(WASM_INSTANCE_OBJECT_SIZE(name), type), GetInstance(), \
    wasm::ObjectAccess::ToTagged(WasmInstanceObject::k##name##Offset))

101// Use MachineType::Pointer() over Tagged() to load root pointers because they
102// do not get compressed.
103#define LOAD_ROOT(root_name, factory_name)                   \
(parameter_mode_ == kNoSpecialParameterMode                \
     ? graph()->NewNode(mcgraph()->common()->HeapConstant( \
           isolate_->factory()->factory_name()))           \
     : gasm_->LoadImmutable(                               \
           MachineType::Pointer(), BuildLoadIsolateRoot(), \
           IsolateData::root_slot_offset(RootIndex::k##root_name)))

111bool ContainsSimd(const wasm::FunctionSig* sig) {
for (auto type : sig->all()) {
  if (type == wasm::kWasmS128) return true;
}
return false;
116}

118bool ContainsInt64(const wasm::FunctionSig* sig) {
for (auto type : sig->all()) {
  if (type == wasm::kWasmI64) return true;
}
return false;
123}

125constexpr Builtin WasmRuntimeStubIdToBuiltinName(
  wasm::WasmCode::RuntimeStubId runtime_stub_id) {
switch (runtime_stub_id) {
128#define DEF_CASE(name)          \
case wasm::WasmCode::k##name: \
  return Builtin::k##name;
131#define DEF_TRAP_CASE(name) DEF_CASE(ThrowWasm##name)
  WASM_RUNTIME_STUB_LIST(DEF_CASE, DEF_TRAP_CASE)DEF_TRAP_CASE(TrapUnreachable) DEF_TRAP_CASE(TrapMemOutOfBounds
) DEF_TRAP_CASE(TrapUnalignedAccess) DEF_TRAP_CASE(TrapDivByZero
) DEF_TRAP_CASE(TrapDivUnrepresentable) DEF_TRAP_CASE(TrapRemByZero
) DEF_TRAP_CASE(TrapFloatUnrepresentable) DEF_TRAP_CASE(TrapFuncSigMismatch
) DEF_TRAP_CASE(TrapDataSegmentOutOfBounds) DEF_TRAP_CASE(TrapElemSegmentDropped
) DEF_TRAP_CASE(TrapTableOutOfBounds) DEF_TRAP_CASE(TrapRethrowNull
) DEF_TRAP_CASE(TrapNullDereference) DEF_TRAP_CASE(TrapIllegalCast
) DEF_TRAP_CASE(TrapArrayOutOfBounds) DEF_TRAP_CASE(TrapArrayTooLarge
) DEF_CASE(WasmCompileLazy) DEF_CASE(WasmTriggerTierUp) DEF_CASE
(WasmDebugBreak) DEF_CASE(WasmInt32ToHeapNumber) DEF_CASE(WasmTaggedNonSmiToInt32
) DEF_CASE(WasmFloat32ToNumber) DEF_CASE(WasmFloat64ToNumber)
 DEF_CASE(WasmTaggedToFloat64) DEF_CASE(WasmAllocateJSArray) DEF_CASE
(WasmAtomicNotify) DEF_CASE(WasmI32AtomicWait32) DEF_CASE(WasmI32AtomicWait64
) DEF_CASE(WasmI64AtomicWait32) DEF_CASE(WasmI64AtomicWait64)
 DEF_CASE(WasmGetOwnProperty) DEF_CASE(WasmRefFunc) DEF_CASE(
WasmMemoryGrow) DEF_CASE(WasmTableInit) DEF_CASE(WasmTableCopy
) DEF_CASE(WasmTableFill) DEF_CASE(WasmTableGrow) DEF_CASE(WasmTableGet
) DEF_CASE(WasmTableSet) DEF_CASE(WasmStackGuard) DEF_CASE(WasmStackOverflow
) DEF_CASE(WasmAllocateFixedArray) DEF_CASE(WasmThrow) DEF_CASE
(WasmRethrow) DEF_CASE(WasmRethrowExplicitContext) DEF_CASE(WasmTraceEnter
) DEF_CASE(WasmTraceExit) DEF_CASE(WasmTraceMemory) DEF_CASE(
BigIntToI32Pair) DEF_CASE(BigIntToI64) DEF_CASE(CallRefIC) DEF_CASE
(DoubleToI) DEF_CASE(I32PairToBigInt) DEF_CASE(I64ToBigInt) DEF_CASE
(RecordWriteEmitRememberedSetSaveFP) DEF_CASE(RecordWriteOmitRememberedSetSaveFP
) DEF_CASE(RecordWriteEmitRememberedSetIgnoreFP) DEF_CASE(RecordWriteOmitRememberedSetIgnoreFP
) DEF_CASE(ToNumber) DEF_CASE(WasmAllocateArray_Uninitialized
) DEF_CASE(WasmAllocateArray_InitNull) DEF_CASE(WasmAllocateArray_InitZero
) DEF_CASE(WasmArrayCopy) DEF_CASE(WasmArrayCopyWithChecks) DEF_CASE
(WasmArrayInitFromData) DEF_CASE(WasmAllocateStructWithRtt) DEF_CASE
(WasmSubtypeCheck) DEF_CASE(WasmOnStackReplace) DEF_CASE(WasmSuspend
)
133#undef DEF_CASE
134#undef DEF_TRAP_CASE
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
138}

140CallDescriptor* GetBuiltinCallDescriptor(
  Builtin name, Zone* zone, StubCallMode stub_mode,
  bool needs_frame_state = false,
  Operator::Properties properties = Operator::kNoProperties) {
CallInterfaceDescriptor interface_descriptor =
    Builtins::CallInterfaceDescriptorFor(name);
return Linkage::GetStubCallDescriptor(
    zone,                                           // zone
    interface_descriptor,                           // descriptor
    interface_descriptor.GetStackParameterCount(),  // stack parameter count
    needs_frame_state ? CallDescriptor::kNeedsFrameState
                      : CallDescriptor::kNoFlags,  // flags
    properties,                                    // properties
    stub_mode);                                    // stub call mode
154}

156ObjectAccess ObjectAccessForGCStores(wasm::ValueType type) {
return ObjectAccess(
    MachineType::TypeForRepresentation(type.machine_representation(),
                                       !type.is_packed()),
    type.is_reference() ? kFullWriteBarrier : kNoWriteBarrier);
161}
162}  // namespace

164JSWasmCallData::JSWasmCallData(const wasm::FunctionSig* wasm_signature)
  : result_needs_conversion_(wasm_signature->return_count() == 1 &&
                             wasm_signature->GetReturn().kind() ==
                                 wasm::kI64) {
arg_needs_conversion_.resize(wasm_signature->parameter_count());
for (size_t i = 0; i < wasm_signature->parameter_count(); i++) {
  wasm::ValueType type = wasm_signature->GetParam(i);
  arg_needs_conversion_[i] = type.kind() == wasm::kI64;
}
173}

175class WasmGraphAssembler : public GraphAssembler {
public:
WasmGraphAssembler(MachineGraph* mcgraph, Zone* zone)
    : GraphAssembler(mcgraph, zone), simplified_(zone) {}

template <typename... Args>
Node* CallRuntimeStub(wasm::WasmCode::RuntimeStubId stub_id,
                      Operator::Properties properties, Args*... args) {
  auto* call_descriptor = GetBuiltinCallDescriptor(
      WasmRuntimeStubIdToBuiltinName(stub_id), temp_zone(),
      StubCallMode::kCallWasmRuntimeStub, false, properties);
  // A direct call to a wasm runtime stub defined in this module.
  // Just encode the stub index. This will be patched at relocation.
  Node* call_target = mcgraph()->RelocatableIntPtrConstant(
      stub_id, RelocInfo::WASM_STUB_CALL);
  return Call(call_descriptor, call_target, args...);
}

template <typename... Args>
Node* CallBuiltin(Builtin name, Operator::Properties properties,
                  Args*... args) {
  auto* call_descriptor = GetBuiltinCallDescriptor(
      name, temp_zone(), StubCallMode::kCallBuiltinPointer, false,
      properties);
  Node* call_target = GetBuiltinPointerTarget(name);
  return Call(call_descriptor, call_target, args...);
}

void MergeControlToEnd(Node* node) {
  NodeProperties::MergeControlToEnd(graph(), mcgraph()->common(), node);
}

void AssertFalse(Node* condition) {
208#if DEBUG
  if (FLAG_debug_code) {
    auto ok = MakeLabel();
    GotoIfNot(condition, &ok);
    Unreachable();
    Bind(&ok);
  }
215#endif
}

Node* GetBuiltinPointerTarget(Builtin builtin) {
  static_assert(std::is_same<Smi, BuiltinPtr>(), "BuiltinPtr must be Smi");
  return NumberConstant(static_cast<int>(builtin));
}

// Sets {true_node} and {false_node} to their corresponding Branch outputs.
// Returns the Branch node. Does not change control().
Node* Branch(Node* cond, Node** true_node, Node** false_node,
             BranchHint hint) {
  DCHECK_NOT_NULL(cond)((void) 0);
  Node* branch =
      graph()->NewNode(mcgraph()->common()->Branch(hint), cond, control());
  *true_node = graph()->NewNode(mcgraph()->common()->IfTrue(), branch);
  *false_node = graph()->NewNode(mcgraph()->common()->IfFalse(), branch);
  return branch;
}

Node* NumberConstant(volatile double value) {
  return graph()->NewNode(mcgraph()->common()->NumberConstant(value));
}

// Helper functions for dealing with HeapObjects.
// Rule of thumb: if access to a given field in an object is required in
// at least two places, put a helper function here.

Node* Allocate(int size) {
  AllowLargeObjects allow_large = size < kMaxRegularHeapObjectSize
                                      ? AllowLargeObjects::kFalse
                                      : AllowLargeObjects::kTrue;
  return Allocate(Int32Constant(size), allow_large);
}

Node* Allocate(Node* size,
               AllowLargeObjects allow_large = AllowLargeObjects::kTrue) {
  return AddNode(
      graph()->NewNode(simplified_.AllocateRaw(
                           Type::Any(), AllocationType::kYoung, allow_large),
                       size, effect(), control()));
}

Node* LoadFromObject(MachineType type, Node* base, Node* offset) {
  return AddNode(graph()->NewNode(
      simplified_.LoadFromObject(ObjectAccess(type, kNoWriteBarrier)), base,
      offset, effect(), control()));
}

Node* LoadFromObject(MachineType type, Node* base, int offset) {
  return LoadFromObject(type, base, IntPtrConstant(offset));
}

Node* LoadImmutableFromObject(MachineType type, Node* base, Node* offset) {
  return AddNode(graph()->NewNode(simplified_.LoadImmutableFromObject(
                                      ObjectAccess(type, kNoWriteBarrier)),
                                  base, offset, effect(), control()));
}

Node* LoadImmutableFromObject(MachineType type, Node* base, int offset) {
  return LoadImmutableFromObject(type, base, IntPtrConstant(offset));
}

Node* LoadImmutable(LoadRepresentation rep, Node* base, Node* offset) {
  return AddNode(graph()->NewNode(mcgraph()->machine()->LoadImmutable(rep),
                                  base, offset));
}

Node* LoadImmutable(LoadRepresentation rep, Node* base, int offset) {
  return LoadImmutable(rep, base, IntPtrConstant(offset));
}

Node* StoreToObject(ObjectAccess access, Node* base, Node* offset,
                    Node* value) {
  return AddNode(graph()->NewNode(simplified_.StoreToObject(access), base,
                                  offset, value, effect(), control()));
}

Node* StoreToObject(ObjectAccess access, Node* base, int offset,
                    Node* value) {
  return StoreToObject(access, base, IntPtrConstant(offset), value);
}

Node* InitializeImmutableInObject(ObjectAccess access, Node* base,
                                  Node* offset, Node* value) {
  return AddNode(
      graph()->NewNode(simplified_.InitializeImmutableInObject(access), base,
                       offset, value, effect(), control()));
}

Node* InitializeImmutableInObject(ObjectAccess access, Node* base, int offset,
                                  Node* value) {
  return InitializeImmutableInObject(access, base, IntPtrConstant(offset),
                                     value);
}

Node* IsI31(Node* object) {
  if (COMPRESS_POINTERS_BOOLfalse) {
    return Word32Equal(Word32And(object, Int32Constant(kSmiTagMask)),
                       Int32Constant(kSmiTag));
  } else {
    return WordEqual(WordAnd(object, IntPtrConstant(kSmiTagMask)),
                     IntPtrConstant(kSmiTag));
  }
}

// Maps and their contents.
Node* LoadMap(Node* object) {
  Node* map_word =
      LoadImmutableFromObject(MachineType::TaggedPointer(), object,
                              HeapObject::kMapOffset - kHeapObjectTag);
326#ifdef V8_MAP_PACKING
  return UnpackMapWord(map_word);
328#else
  return map_word;
330#endif
}

void StoreMap(Node* heap_object, Node* map) {
  ObjectAccess access(MachineType::TaggedPointer(), kMapWriteBarrier);
335#ifdef V8_MAP_PACKING
  map = PackMapWord(TNode<Map>::UncheckedCast(map));
337#endif
  InitializeImmutableInObject(access, heap_object,
                              HeapObject::kMapOffset - kHeapObjectTag, map);
}

Node* LoadInstanceType(Node* map) {
  return LoadImmutableFromObject(
      MachineType::Uint16(), map,
      wasm::ObjectAccess::ToTagged(Map::kInstanceTypeOffset));
}
Node* LoadWasmTypeInfo(Node* map) {
  int offset = Map::kConstructorOrBackPointerOrNativeContextOffset;
  return LoadImmutableFromObject(MachineType::TaggedPointer(), map,
                                 wasm::ObjectAccess::ToTagged(offset));
}

Node* LoadSupertypes(Node* wasm_type_info) {
  return LoadImmutableFromObject(
      MachineType::TaggedPointer(), wasm_type_info,
      wasm::ObjectAccess::ToTagged(WasmTypeInfo::kSupertypesOffset));
}

// FixedArrays.

Node* LoadFixedArrayLengthAsSmi(Node* fixed_array) {
  return LoadImmutableFromObject(
      MachineType::TaggedSigned(), fixed_array,
      wasm::ObjectAccess::ToTagged(FixedArray::kLengthOffset));
}

Node* LoadFixedArrayElement(Node* fixed_array, Node* index_intptr,
                            MachineType type = MachineType::AnyTagged()) {
  Node* offset = IntAdd(
      IntMul(index_intptr, IntPtrConstant(kTaggedSize)),
      IntPtrConstant(wasm::ObjectAccess::ToTagged(FixedArray::kHeaderSize)));
  return LoadFromObject(type, fixed_array, offset);
}

Node* LoadImmutableFixedArrayElement(
    Node* fixed_array, Node* index_intptr,
    MachineType type = MachineType::AnyTagged()) {
  Node* offset = IntAdd(
      IntMul(index_intptr, IntPtrConstant(kTaggedSize)),
      IntPtrConstant(wasm::ObjectAccess::ToTagged(FixedArray::kHeaderSize)));
  return LoadImmutableFromObject(type, fixed_array, offset);
}

Node* LoadFixedArrayElement(Node* array, int index, MachineType type) {
  return LoadFromObject(
      type, array,
      wasm::ObjectAccess::ElementOffsetInTaggedFixedArray(index));
}

Node* LoadFixedArrayElementSmi(Node* array, int index) {
  return LoadFixedArrayElement(array, index, MachineType::TaggedSigned());
}

Node* LoadFixedArrayElementPtr(Node* array, int index) {
  return LoadFixedArrayElement(array, index, MachineType::TaggedPointer());
}

Node* LoadFixedArrayElementAny(Node* array, int index) {
  return LoadFixedArrayElement(array, index, MachineType::AnyTagged());
}

Node* StoreFixedArrayElement(Node* array, int index, Node* value,
                             ObjectAccess access) {
  return StoreToObject(
      access, array,
      wasm::ObjectAccess::ElementOffsetInTaggedFixedArray(index), value);
}

Node* StoreFixedArrayElementSmi(Node* array, int index, Node* value) {
  return StoreFixedArrayElement(
      array, index, value,
      ObjectAccess(MachineType::TaggedSigned(), kNoWriteBarrier));
}

Node* StoreFixedArrayElementAny(Node* array, int index, Node* value) {
  return StoreFixedArrayElement(
      array, index, value,
      ObjectAccess(MachineType::AnyTagged(), kFullWriteBarrier));
}

// Functions, SharedFunctionInfos, FunctionData.

Node* LoadSharedFunctionInfo(Node* js_function) {
  return LoadFromObject(
      MachineType::TaggedPointer(), js_function,
      wasm::ObjectAccess::SharedFunctionInfoOffsetInTaggedJSFunction());
}
Node* LoadContextFromJSFunction(Node* js_function) {
  return LoadFromObject(
      MachineType::TaggedPointer(), js_function,
      wasm::ObjectAccess::ContextOffsetInTaggedJSFunction());
}

Node* LoadFunctionDataFromJSFunction(Node* js_function) {
  Node* shared = LoadSharedFunctionInfo(js_function);
  return LoadFromObject(
      MachineType::TaggedPointer(), shared,
      wasm::ObjectAccess::ToTagged(SharedFunctionInfo::kFunctionDataOffset));
}

Node* LoadExportedFunctionIndexAsSmi(Node* exported_function_data) {
  return LoadImmutableFromObject(
      MachineType::TaggedSigned(), exported_function_data,
      wasm::ObjectAccess::ToTagged(
          WasmExportedFunctionData::kFunctionIndexOffset));
}
Node* LoadExportedFunctionInstance(Node* exported_function_data) {
  return LoadImmutableFromObject(
      MachineType::TaggedPointer(), exported_function_data,
      wasm::ObjectAccess::ToTagged(
          WasmExportedFunctionData::kInstanceOffset));
}

// JavaScript objects.

Node* LoadJSArrayElements(Node* js_array) {
  return LoadFromObject(
      MachineType::AnyTagged(), js_array,
      wasm::ObjectAccess::ToTagged(JSObject::kElementsOffset));
}

// WasmGC objects.

Node* FieldOffset(const wasm::StructType* type, uint32_t field_index) {
  return IntPtrConstant(wasm::ObjectAccess::ToTagged(
      WasmStruct::kHeaderSize + type->field_offset(field_index)));
}

Node* StoreStructField(Node* struct_object, const wasm::StructType* type,
                       uint32_t field_index, Node* value) {
  ObjectAccess access = ObjectAccessForGCStores(type->field(field_index));
  return type->mutability(field_index)
             ? StoreToObject(access, struct_object,
                             FieldOffset(type, field_index), value)
             : InitializeImmutableInObject(access, struct_object,
                                           FieldOffset(type, field_index),
                                           value);
}

Node* WasmArrayElementOffset(Node* index, wasm::ValueType element_type) {
  Node* index_intptr =
      mcgraph()->machine()->Is64() ? ChangeUint32ToUint64(index) : index;
  return IntAdd(
      IntPtrConstant(wasm::ObjectAccess::ToTagged(WasmArray::kHeaderSize)),
      IntMul(index_intptr, IntPtrConstant(element_type.value_kind_size())));
}

Node* LoadWasmArrayLength(Node* array) {
  return LoadImmutableFromObject(
      MachineType::Uint32(), array,
      wasm::ObjectAccess::ToTagged(WasmArray::kLengthOffset));
}

Node* IsDataRefMap(Node* map) {
  Node* instance_type = LoadInstanceType(map);
  // We're going to test a range of WasmObject instance types with a single
  // unsigned comparison.
  Node* comparison_value =
      Int32Sub(instance_type, Int32Constant(FIRST_WASM_OBJECT_TYPE));
  return Uint32LessThanOrEqual(
      comparison_value,
      Int32Constant(LAST_WASM_OBJECT_TYPE - FIRST_WASM_OBJECT_TYPE));
}

// Generic HeapObject helpers.

Node* HasInstanceType(Node* heap_object, InstanceType type) {
  Node* map = LoadMap(heap_object);
  Node* instance_type = LoadInstanceType(map);
  return Word32Equal(instance_type, Int32Constant(type));
}

SimplifiedOperatorBuilder* simplified() { return &simplified_; }

private:
SimplifiedOperatorBuilder simplified_;
517};

519WasmGraphBuilder::WasmGraphBuilder(
  wasm::CompilationEnv* env, Zone* zone, MachineGraph* mcgraph,
  const wasm::FunctionSig* sig,
  compiler::SourcePositionTable* source_position_table,
  Parameter0Mode parameter_mode, Isolate* isolate)
  : gasm_(std::make_unique<WasmGraphAssembler>(mcgraph, zone)),
    zone_(zone),
    mcgraph_(mcgraph),
    env_(env),
    has_simd_(ContainsSimd(sig)),
    sig_(sig),
    source_position_table_(source_position_table),
    parameter_mode_(parameter_mode),
    isolate_(isolate) {
DCHECK_EQ(isolate == nullptr, parameter_mode_ != kNoSpecialParameterMode)((void) 0);
DCHECK_IMPLIES(env && env->bounds_checks == wasm::kTrapHandler,((void) 0)
               trap_handler::IsTrapHandlerEnabled())((void) 0);
DCHECK_NOT_NULL(mcgraph_)((void) 0);
537}

539// Destructor define here where the definition of {WasmGraphAssembler} is
540// available.
541WasmGraphBuilder::~WasmGraphBuilder() = default;

543void WasmGraphBuilder::Start(unsigned params) {
Node* start = graph()->NewNode(mcgraph()->common()->Start(params));
graph()->SetStart(start);
SetEffectControl(start);
// Initialize parameter nodes.
parameters_ = zone_->NewArray<Node*>(params);
for (unsigned i = 0; i < params; i++) {
  parameters_[i] = nullptr;
}
// Initialize instance node.
switch (parameter_mode_) {
  case kInstanceMode:
    instance_node_ = Param(wasm::kWasmInstanceParameterIndex);
    break;
  case kNoSpecialParameterMode:
    instance_node_ = gasm_->LoadExportedFunctionInstance(
        gasm_->LoadFunctionDataFromJSFunction(
            Param(Linkage::kJSCallClosureParamIndex, "%closure")));
    break;
  case kWasmApiFunctionRefMode:
    // We need an instance node anyway, because FromJS() needs to pass it to
    // the  WasmIsValidRefValue runtime function.
    instance_node_ = UndefinedValue();
    break;
}
graph()->SetEnd(graph()->NewNode(mcgraph()->common()->End(0)));
569}

571Node* WasmGraphBuilder::Param(int index, const char* debug_name) {
DCHECK_NOT_NULL(graph()->start())((void) 0);
// Turbofan allows negative parameter indices.
static constexpr int kMinParameterIndex = -1;
DCHECK_GE(index, kMinParameterIndex)((void) 0);
int array_index = index - kMinParameterIndex;
if (parameters_[array_index] == nullptr) {
  parameters_[array_index] = graph()->NewNode(
      mcgraph()->common()->Parameter(index, debug_name), graph()->start());
}
return parameters_[array_index];
582}

584Node* WasmGraphBuilder::Loop(Node* entry) {
return graph()->NewNode(mcgraph()->common()->Loop(1), entry);
586}

588void WasmGraphBuilder::TerminateLoop(Node* effect, Node* control) {
Node* terminate =
    graph()->NewNode(mcgraph()->common()->Terminate(), effect, control);
gasm_->MergeControlToEnd(terminate);
592}

594Node* WasmGraphBuilder::LoopExit(Node* loop_node) {
DCHECK(loop_node->opcode() == IrOpcode::kLoop)((void) 0);
Node* loop_exit =
    graph()->NewNode(mcgraph()->common()->LoopExit(), control(), loop_node);
Node* loop_exit_effect = graph()->NewNode(
    mcgraph()->common()->LoopExitEffect(), effect(), loop_exit);
SetEffectControl(loop_exit_effect, loop_exit);
return loop_exit;
602}

604Node* WasmGraphBuilder::LoopExitValue(Node* value,
                                    MachineRepresentation representation) {
DCHECK(control()->opcode() == IrOpcode::kLoopExit)((void) 0);
return graph()->NewNode(mcgraph()->common()->LoopExitValue(representation),
                        value, control());
609}

611void WasmGraphBuilder::TerminateThrow(Node* effect, Node* control) {
Node* terminate =
    graph()->NewNode(mcgraph()->common()->Throw(), effect, control);
gasm_->MergeControlToEnd(terminate);
615}

617bool WasmGraphBuilder::IsPhiWithMerge(Node* phi, Node* merge) {
return phi && IrOpcode::IsPhiOpcode(phi->opcode()) &&
       NodeProperties::GetControlInput(phi) == merge;
620}

622bool WasmGraphBuilder::ThrowsException(Node* node, Node** if_success,
                                     Node** if_exception) {
if (node->op()->HasProperty(compiler::Operator::kNoThrow)) {
  return false;
}

*if_success = graph()->NewNode(mcgraph()->common()->IfSuccess(), node);
*if_exception =
    graph()->NewNode(mcgraph()->common()->IfException(), node, node);

return true;
633}

635void WasmGraphBuilder::AppendToMerge(Node* merge, Node* from) {
DCHECK(IrOpcode::IsMergeOpcode(merge->opcode()))((void) 0);
merge->AppendInput(mcgraph()->zone(), from);
int new_size = merge->InputCount();
NodeProperties::ChangeOp(
    merge, mcgraph()->common()->ResizeMergeOrPhi(merge->op(), new_size));
641}

643void WasmGraphBuilder::AppendToPhi(Node* phi, Node* from) {
DCHECK(IrOpcode::IsPhiOpcode(phi->opcode()))((void) 0);
int new_size = phi->InputCount();
phi->InsertInput(mcgraph()->zone(), phi->InputCount() - 1, from);
NodeProperties::ChangeOp(
    phi, mcgraph()->common()->ResizeMergeOrPhi(phi->op(), new_size));
649}

651template <typename... Nodes>
652Node* WasmGraphBuilder::Merge(Node* fst, Nodes*... args) {
return graph()->NewNode(this->mcgraph()->common()->Merge(1 + sizeof...(args)),
                        fst, args...);
655}

657Node* WasmGraphBuilder::Merge(unsigned count, Node** controls) {
return graph()->NewNode(mcgraph()->common()->Merge(count), count, controls);
659}

661Node* WasmGraphBuilder::Phi(wasm::ValueType type, unsigned count,
                          Node** vals_and_control) {
DCHECK(IrOpcode::IsMergeOpcode(vals_and_control[count]->opcode()))((void) 0);
DCHECK_EQ(vals_and_control[count]->op()->ControlInputCount(), count)((void) 0);
return graph()->NewNode(
    mcgraph()->common()->Phi(type.machine_representation(), count), count + 1,
    vals_and_control);
668}

670Node* WasmGraphBuilder::EffectPhi(unsigned count, Node** effects_and_control) {
DCHECK(IrOpcode::IsMergeOpcode(effects_and_control[count]->opcode()))((void) 0);
return graph()->NewNode(mcgraph()->common()->EffectPhi(count), count + 1,
                        effects_and_control);
674}

676Node* WasmGraphBuilder::RefNull() { return LOAD_ROOT(NullValue, null_value); }

678Node* WasmGraphBuilder::RefFunc(uint32_t function_index) {
return gasm_->CallRuntimeStub(wasm::WasmCode::kWasmRefFunc,
                              Operator::kNoThrow,
                              gasm_->Uint32Constant(function_index));
682}

684Node* WasmGraphBuilder::RefAsNonNull(Node* arg,
                                   wasm::WasmCodePosition position) {
if (!FLAG_experimental_wasm_skip_null_checks) {
  TrapIfTrue(wasm::kTrapIllegalCast, IsNull(arg), position);
}
return arg;
690}

692Node* WasmGraphBuilder::NoContextConstant() {
return mcgraph()->IntPtrConstant(0);
694}

696Node* WasmGraphBuilder::GetInstance() { return instance_node_.get(); }

698Node* WasmGraphBuilder::BuildLoadIsolateRoot() {
switch (parameter_mode_) {
  case kInstanceMode:
    // For wasm functions, the IsolateRoot is loaded from the instance node so
    // that the generated code is Isolate independent.
    return LOAD_INSTANCE_FIELD(IsolateRoot, MachineType::Pointer());
  case kWasmApiFunctionRefMode:
    // Note: Even if V8_SANDBOXED_EXTERNAL_POINTERS, the pointer to the
    // isolate root is not encoded, much like the case above. TODO(manoskouk):
    // Decode the pointer here if that changes.
    return gasm_->Load(
        MachineType::Pointer(), Param(0),
        wasm::ObjectAccess::ToTagged(WasmApiFunctionRef::kIsolateRootOffset));
  case kNoSpecialParameterMode:
    return mcgraph()->IntPtrConstant(isolate_->isolate_root());
}
714}

716Node* WasmGraphBuilder::Int32Constant(int32_t value) {
return mcgraph()->Int32Constant(value);
718}

720Node* WasmGraphBuilder::Int64Constant(int64_t value) {
return mcgraph()->Int64Constant(value);
722}

724Node* WasmGraphBuilder::UndefinedValue() {
return LOAD_ROOT(UndefinedValue, undefined_value);
726}

728void WasmGraphBuilder::StackCheck(
  WasmInstanceCacheNodes* shared_memory_instance_cache,
  wasm::WasmCodePosition position) {
DCHECK_NOT_NULL(env_)((void) 0);  // Wrappers don't get stack checks.
if (!FLAG_wasm_stack_checks || !env_->runtime_exception_support) {
  return;
}

Node* limit_address =
    LOAD_INSTANCE_FIELD(StackLimitAddress, MachineType::Pointer());
Node* limit = gasm_->LoadFromObject(MachineType::Pointer(), limit_address, 0);

Node* check = SetEffect(graph()->NewNode(
    mcgraph()->machine()->StackPointerGreaterThan(StackCheckKind::kWasm),
    limit, effect()));

Node* if_true;
Node* if_false;
BranchExpectTrue(check, &if_true, &if_false);

if (stack_check_call_operator_ == nullptr) {
  // Build and cache the stack check call operator and the constant
  // representing the stack check code.

  // A direct call to a wasm runtime stub defined in this module.
  // Just encode the stub index. This will be patched at relocation.
  stack_check_code_node_.set(mcgraph()->RelocatableIntPtrConstant(
      wasm::WasmCode::kWasmStackGuard, RelocInfo::WASM_STUB_CALL));

  constexpr Operator::Properties properties =
      Operator::kNoThrow | Operator::kNoWrite;
  // If we ever want to mark this call as  kNoDeopt, we'll have to make it
  // non-eliminatable some other way.
  STATIC_ASSERT((properties & Operator::kEliminatable) !=static_assert((properties & Operator::kEliminatable) != Operator
::kEliminatable, "(properties & Operator::kEliminatable) != Operator::kEliminatable"
)
                Operator::kEliminatable)static_assert((properties & Operator::kEliminatable) != Operator
::kEliminatable, "(properties & Operator::kEliminatable) != Operator::kEliminatable"
);
  auto call_descriptor = Linkage::GetStubCallDescriptor(
      mcgraph()->zone(),                    // zone
      NoContextDescriptor{},                // descriptor
      0,                                    // stack parameter count
      CallDescriptor::kNoFlags,             // flags
      properties,                           // properties
      StubCallMode::kCallWasmRuntimeStub);  // stub call mode
  stack_check_call_operator_ = mcgraph()->common()->Call(call_descriptor);
}

Node* call =
    graph()->NewNode(stack_check_call_operator_.get(),
                     stack_check_code_node_.get(), effect(), if_false);
SetSourcePosition(call, position);

DCHECK_GT(call->op()->EffectOutputCount(), 0)((void) 0);
DCHECK_EQ(call->op()->ControlOutputCount(), 0)((void) 0);

SetEffectControl(call, if_false);

Node* merge = Merge(if_true, control());
Node* ephi_inputs[] = {check, effect(), merge};
Node* ephi = EffectPhi(2, ephi_inputs);

// We only need to refresh the size of a shared memory, as its start can never
// change.
if (shared_memory_instance_cache != nullptr) {
  // We handle caching of the instance cache nodes manually, and we may reload
  // them in contexts where load elimination would eliminate the reload.
  // Therefore, we use plain Load nodes which are not subject to load
  // elimination.
  Node* new_memory_size =
      LOAD_INSTANCE_FIELD_NO_ELIMINATION(MemorySize, MachineType::UintPtr())gasm_->Load( assert_size(WASM_INSTANCE_OBJECT_SIZE(MemorySize
), MachineType::UintPtr()), GetInstance(), wasm::ObjectAccess
::ToTagged(WasmInstanceObject::kMemorySizeOffset));
  shared_memory_instance_cache->mem_size = CreateOrMergeIntoPhi(
      MachineType::PointerRepresentation(), merge,
      shared_memory_instance_cache->mem_size, new_memory_size);
}

SetEffectControl(ephi, merge);
802}

804void WasmGraphBuilder::PatchInStackCheckIfNeeded() {
if (!needs_stack_check_) return;

Node* start = graph()->start();
// Place a stack check which uses a dummy node as control and effect.
Node* dummy = graph()->NewNode(mcgraph()->common()->Dead());
SetEffectControl(dummy);
// The function-prologue stack check is associated with position 0, which
// is never a position of any instruction in the function.
// We pass the null instance cache, as we are at the beginning of the function
// and do not need to update it.
StackCheck(nullptr, 0);

// In testing, no stack checks were emitted. Nothing to rewire then.
if (effect() == dummy) return;

// Now patch all control uses of {start} to use {control} and all effect uses
// to use {effect} instead. We exclude Projection nodes: Projections pointing
// to start are floating control, and we want it to point directly to start
// because of restrictions later in the pipeline (specifically, loop
// unrolling).
// Then rewire the dummy node to use start instead.
NodeProperties::ReplaceUses(start, start, effect(), control());
{
  // We need an intermediate vector because we are not allowed to modify a use
  // while traversing uses().
  std::vector<Node*> projections;
  for (Node* use : control()->uses()) {
    if (use->opcode() == IrOpcode::kProjection) projections.emplace_back(use);
  }
  for (Node* use : projections) {
    use->ReplaceInput(NodeProperties::FirstControlIndex(use), start);
  }
}
NodeProperties::ReplaceUses(dummy, nullptr, start, start);
839}

841Node* WasmGraphBuilder::Binop(wasm::WasmOpcode opcode, Node* left, Node* right,
                            wasm::WasmCodePosition position) {
const Operator* op;
MachineOperatorBuilder* m = mcgraph()->machine();
switch (opcode) {
  case wasm::kExprI32Add:
    op = m->Int32Add();
    break;
  case wasm::kExprI32Sub:
    op = m->Int32Sub();
    break;
  case wasm::kExprI32Mul:
    op = m->Int32Mul();
    break;
  case wasm::kExprI32DivS:
    return BuildI32DivS(left, right, position);
  case wasm::kExprI32DivU:
    return BuildI32DivU(left, right, position);
  case wasm::kExprI32RemS:
    return BuildI32RemS(left, right, position);
  case wasm::kExprI32RemU:
    return BuildI32RemU(left, right, position);
  case wasm::kExprI32And:
    op = m->Word32And();
    break;
  case wasm::kExprI32Ior:
    op = m->Word32Or();
    break;
  case wasm::kExprI32Xor:
    op = m->Word32Xor();
    break;
  case wasm::kExprI32Shl:
    op = m->Word32Shl();
    right = MaskShiftCount32(right);
    break;
  case wasm::kExprI32ShrU:
    op = m->Word32Shr();
    right = MaskShiftCount32(right);
    break;
  case wasm::kExprI32ShrS:
    op = m->Word32Sar();
    right = MaskShiftCount32(right);
    break;
  case wasm::kExprI32Ror:
    op = m->Word32Ror();
    right = MaskShiftCount32(right);
    break;
  case wasm::kExprI32Rol:
    if (m->Word32Rol().IsSupported()) {
      op = m->Word32Rol().op();
      right = MaskShiftCount32(right);
      break;
    }
    return BuildI32Rol(left, right);
  case wasm::kExprI32Eq:
    op = m->Word32Equal();
    break;
  case wasm::kExprI32Ne:
    return Invert(Binop(wasm::kExprI32Eq, left, right));
  case wasm::kExprI32LtS:
    op = m->Int32LessThan();
    break;
  case wasm::kExprI32LeS:
    op = m->Int32LessThanOrEqual();
    break;
  case wasm::kExprI32LtU:
    op = m->Uint32LessThan();
    break;
  case wasm::kExprI32LeU:
    op = m->Uint32LessThanOrEqual();
    break;
  case wasm::kExprI32GtS:
    op = m->Int32LessThan();
    std::swap(left, right);
    break;
  case wasm::kExprI32GeS:
    op = m->Int32LessThanOrEqual();
    std::swap(left, right);
    break;
  case wasm::kExprI32GtU:
    op = m->Uint32LessThan();
    std::swap(left, right);
    break;
  case wasm::kExprI32GeU:
    op = m->Uint32LessThanOrEqual();
    std::swap(left, right);
    break;
  case wasm::kExprI64And:
    op = m->Word64And();
    break;
  case wasm::kExprI64Add:
    op = m->Int64Add();
    break;
  case wasm::kExprI64Sub:
    op = m->Int64Sub();
    break;
  case wasm::kExprI64Mul:
    op = m->Int64Mul();
    break;
  case wasm::kExprI64DivS:
    return BuildI64DivS(left, right, position);
  case wasm::kExprI64DivU:
    return BuildI64DivU(left, right, position);
  case wasm::kExprI64RemS:
    return BuildI64RemS(left, right, position);
  case wasm::kExprI64RemU:
    return BuildI64RemU(left, right, position);
  case wasm::kExprI64Ior:
    op = m->Word64Or();
    break;
  case wasm::kExprI64Xor:
    op = m->Word64Xor();
    break;
  case wasm::kExprI64Shl:
    op = m->Word64Shl();
    right = MaskShiftCount64(right);
    break;
  case wasm::kExprI64ShrU:
    op = m->Word64Shr();
    right = MaskShiftCount64(right);
    break;
  case wasm::kExprI64ShrS:
    op = m->Word64Sar();
    right = MaskShiftCount64(right);
    break;
  case wasm::kExprI64Eq:
    op = m->Word64Equal();
    break;
  case wasm::kExprI64Ne:
    return Invert(Binop(wasm::kExprI64Eq, left, right));
  case wasm::kExprI64LtS:
    op = m->Int64LessThan();
    break;
  case wasm::kExprI64LeS:
    op = m->Int64LessThanOrEqual();
    break;
  case wasm::kExprI64LtU:
    op = m->Uint64LessThan();
    break;
  case wasm::kExprI64LeU:
    op = m->Uint64LessThanOrEqual();
    break;
  case wasm::kExprI64GtS:
    op = m->Int64LessThan();
    std::swap(left, right);
    break;
  case wasm::kExprI64GeS:
    op = m->Int64LessThanOrEqual();
    std::swap(left, right);
    break;
  case wasm::kExprI64GtU:
    op = m->Uint64LessThan();
    std::swap(left, right);
    break;
  case wasm::kExprI64GeU:
    op = m->Uint64LessThanOrEqual();
    std::swap(left, right);
    break;
  case wasm::kExprI64Ror:
    right = MaskShiftCount64(right);
    return m->Is64() ? graph()->NewNode(m->Word64Ror(), left, right)
                     : graph()->NewNode(m->Word64RorLowerable(), left, right,
                                        control());
  case wasm::kExprI64Rol:
    if (m->Word64Rol().IsSupported()) {
      return m->Is64() ? graph()->NewNode(m->Word64Rol().op(), left,
                                          MaskShiftCount64(right))
                       : graph()->NewNode(m->Word64RolLowerable().op(), left,
                                          MaskShiftCount64(right), control());
    } else if (m->Word32Rol().IsSupported()) {
      return graph()->NewNode(m->Word64RolLowerable().placeholder(), left,
                              right, control());
    }
    return BuildI64Rol(left, right);
  case wasm::kExprF32CopySign:
    return BuildF32CopySign(left, right);
  case wasm::kExprF64CopySign:
    return BuildF64CopySign(left, right);
  case wasm::kExprF32Add:
    op = m->Float32Add();
    break;
  case wasm::kExprF32Sub:
    op = m->Float32Sub();
    break;
  case wasm::kExprF32Mul:
    op = m->Float32Mul();
    break;
  case wasm::kExprF32Div:
    op = m->Float32Div();
    break;
  case wasm::kExprF32Eq:
    op = m->Float32Equal();
    break;
  case wasm::kExprF32Ne:
    return Invert(Binop(wasm::kExprF32Eq, left, right));
  case wasm::kExprF32Lt:
    op = m->Float32LessThan();
    break;
  case wasm::kExprF32Ge:
    op = m->Float32LessThanOrEqual();
    std::swap(left, right);
    break;
  case wasm::kExprF32Gt:
    op = m->Float32LessThan();
    std::swap(left, right);
    break;
  case wasm::kExprF32Le:
    op = m->Float32LessThanOrEqual();
    break;
  case wasm::kExprF64Add:
    op = m->Float64Add();
    break;
  case wasm::kExprF64Sub:
    op = m->Float64Sub();
    break;
  case wasm::kExprF64Mul:
    op = m->Float64Mul();
    break;
  case wasm::kExprF64Div:
    op = m->Float64Div();
    break;
  case wasm::kExprF64Eq:
    op = m->Float64Equal();
    break;
  case wasm::kExprF64Ne:
    return Invert(Binop(wasm::kExprF64Eq, left, right));
  case wasm::kExprF64Lt:
    op = m->Float64LessThan();
    break;
  case wasm::kExprF64Le:
    op = m->Float64LessThanOrEqual();
    break;
  case wasm::kExprF64Gt:
    op = m->Float64LessThan();
    std::swap(left, right);
    break;
  case wasm::kExprF64Ge:
    op = m->Float64LessThanOrEqual();
    std::swap(left, right);
    break;
  case wasm::kExprF32Min:
    op = m->Float32Min();
    break;
  case wasm::kExprF64Min:
    op = m->Float64Min();
    break;
  case wasm::kExprF32Max:
    op = m->Float32Max();
    break;
  case wasm::kExprF64Max:
    op = m->Float64Max();
    break;
  case wasm::kExprF64Pow:
    return BuildF64Pow(left, right);
  case wasm::kExprF64Atan2:
    op = m->Float64Atan2();
    break;
  case wasm::kExprF64Mod:
    return BuildF64Mod(left, right);
  case wasm::kExprRefEq:
    return gasm_->TaggedEqual(left, right);
  case wasm::kExprI32AsmjsDivS:
    return BuildI32AsmjsDivS(left, right);
  case wasm::kExprI32AsmjsDivU:
    return BuildI32AsmjsDivU(left, right);
  case wasm::kExprI32AsmjsRemS:
    return BuildI32AsmjsRemS(left, right);
  case wasm::kExprI32AsmjsRemU:
    return BuildI32AsmjsRemU(left, right);
  case wasm::kExprI32AsmjsStoreMem8:
    return BuildAsmjsStoreMem(MachineType::Int8(), left, right);
  case wasm::kExprI32AsmjsStoreMem16:
    return BuildAsmjsStoreMem(MachineType::Int16(), left, right);
  case wasm::kExprI32AsmjsStoreMem:
    return BuildAsmjsStoreMem(MachineType::Int32(), left, right);
  case wasm::kExprF32AsmjsStoreMem:
    return BuildAsmjsStoreMem(MachineType::Float32(), left, right);
  case wasm::kExprF64AsmjsStoreMem:
    return BuildAsmjsStoreMem(MachineType::Float64(), left, right);
  default:
    FATAL_UNSUPPORTED_OPCODE(opcode);
}
return graph()->NewNode(op, left, right);
1124}

1126Node* WasmGraphBuilder::Unop(wasm::WasmOpcode opcode, Node* input,
                           wasm::WasmCodePosition position) {
const Operator* op;
MachineOperatorBuilder* m = mcgraph()->machine();
switch (opcode) {
  case wasm::kExprI32Eqz:
    return gasm_->Word32Equal(input, Int32Constant(0));
  case wasm::kExprF32Abs:
    op = m->Float32Abs();
    break;
  case wasm::kExprF32Neg: {
    op = m->Float32Neg();
    break;
  }
  case wasm::kExprF32Sqrt:
    op = m->Float32Sqrt();
    break;
  case wasm::kExprF64Abs:
    op = m->Float64Abs();
    break;
  case wasm::kExprF64Neg: {
    op = m->Float64Neg();
    break;
  }
  case wasm::kExprF64Sqrt:
    op = m->Float64Sqrt();
    break;
  case wasm::kExprI32SConvertF32:
  case wasm::kExprI32UConvertF32:
  case wasm::kExprI32SConvertF64:
  case wasm::kExprI32UConvertF64:
  case wasm::kExprI32SConvertSatF64:
  case wasm::kExprI32UConvertSatF64:
  case wasm::kExprI32SConvertSatF32:
  case wasm::kExprI32UConvertSatF32:
    return BuildIntConvertFloat(input, position, opcode);
  case wasm::kExprI32AsmjsSConvertF64:
    return BuildI32AsmjsSConvertF64(input);
  case wasm::kExprI32AsmjsUConvertF64:
    return BuildI32AsmjsUConvertF64(input);
  case wasm::kExprF32ConvertF64:
    op = m->TruncateFloat64ToFloat32();
    break;
  case wasm::kExprF64SConvertI32:
    op = m->ChangeInt32ToFloat64();
    break;
  case wasm::kExprF64UConvertI32:
    op = m->ChangeUint32ToFloat64();
    break;
  case wasm::kExprF32SConvertI32:
    op = m->RoundInt32ToFloat32();
    break;
  case wasm::kExprF32UConvertI32:
    op = m->RoundUint32ToFloat32();
    break;
  case wasm::kExprI32AsmjsSConvertF32:
    return BuildI32AsmjsSConvertF32(input);
  case wasm::kExprI32AsmjsUConvertF32:
    return BuildI32AsmjsUConvertF32(input);
  case wasm::kExprF64ConvertF32:
    op = m->ChangeFloat32ToFloat64();
    break;
  case wasm::kExprF32ReinterpretI32:
    op = m->BitcastInt32ToFloat32();
    break;
  case wasm::kExprI32ReinterpretF32:
    op = m->BitcastFloat32ToInt32();
    break;
  case wasm::kExprI32Clz:
    op = m->Word32Clz();
    break;
  case wasm::kExprI32Ctz: {
    if (m->Word32Ctz().IsSupported()) {
      op = m->Word32Ctz().op();
      break;
    } else if (m->Word32ReverseBits().IsSupported()) {
      Node* reversed = graph()->NewNode(m->Word32ReverseBits().op(), input);
      Node* result = graph()->NewNode(m->Word32Clz(), reversed);
      return result;
    } else {
      return BuildI32Ctz(input);
    }
  }
  case wasm::kExprI32Popcnt: {
    if (m->Word32Popcnt().IsSupported()) {
      op = m->Word32Popcnt().op();
      break;
    } else {
      return BuildI32Popcnt(input);
    }
  }
  case wasm::kExprF32Floor: {
    if (!m->Float32RoundDown().IsSupported()) return BuildF32Floor(input);
    op = m->Float32RoundDown().op();
    break;
  }
  case wasm::kExprF32Ceil: {
    if (!m->Float32RoundUp().IsSupported()) return BuildF32Ceil(input);
    op = m->Float32RoundUp().op();
    break;
  }
  case wasm::kExprF32Trunc: {
    if (!m->Float32RoundTruncate().IsSupported()) return BuildF32Trunc(input);
    op = m->Float32RoundTruncate().op();
    break;
  }
  case wasm::kExprF32NearestInt: {
    if (!m->Float32RoundTiesEven().IsSupported())
      return BuildF32NearestInt(input);
    op = m->Float32RoundTiesEven().op();
    break;
  }
  case wasm::kExprF64Floor: {
    if (!m->Float64RoundDown().IsSupported()) return BuildF64Floor(input);
    op = m->Float64RoundDown().op();
    break;
  }
  case wasm::kExprF64Ceil: {
    if (!m->Float64RoundUp().IsSupported()) return BuildF64Ceil(input);
    op = m->Float64RoundUp().op();
    break;
  }
  case wasm::kExprF64Trunc: {
    if (!m->Float64RoundTruncate().IsSupported()) return BuildF64Trunc(input);
    op = m->Float64RoundTruncate().op();
    break;
  }
  case wasm::kExprF64NearestInt: {
    if (!m->Float64RoundTiesEven().IsSupported())
      return BuildF64NearestInt(input);
    op = m->Float64RoundTiesEven().op();
    break;
  }
  case wasm::kExprF64Acos: {
    return BuildF64Acos(input);
  }
  case wasm::kExprF64Asin: {
    return BuildF64Asin(input);
  }
  case wasm::kExprF64Atan:
    op = m->Float64Atan();
    break;
  case wasm::kExprF64Cos: {
    op = m->Float64Cos();
    break;
  }
  case wasm::kExprF64Sin: {
    op = m->Float64Sin();
    break;
  }
  case wasm::kExprF64Tan: {
    op = m->Float64Tan();
    break;
  }
  case wasm::kExprF64Exp: {
    op = m->Float64Exp();
    break;
  }
  case wasm::kExprF64Log:
    op = m->Float64Log();
    break;
  case wasm::kExprI32ConvertI64:
    op = m->TruncateInt64ToInt32();
    break;
  case wasm::kExprI64SConvertI32:
    op = m->ChangeInt32ToInt64();
    break;
  case wasm::kExprI64UConvertI32:
    op = m->ChangeUint32ToUint64();
    break;
  case wasm::kExprF64ReinterpretI64:
    op = m->BitcastInt64ToFloat64();
    break;
  case wasm::kExprI64ReinterpretF64:
    op = m->BitcastFloat64ToInt64();
    break;
  case wasm::kExprI64Clz:
    return m->Is64()
               ? graph()->NewNode(m->Word64Clz(), input)
               : graph()->NewNode(m->Word64ClzLowerable(), input, control());
  case wasm::kExprI64Ctz: {
    if (m->Word64Ctz().IsSupported()) {
      return m->Is64() ? graph()->NewNode(m->Word64Ctz().op(), input)
                       : graph()->NewNode(m->Word64CtzLowerable().op(), input,
                                          control());
    } else if (m->Is32() && m->Word32Ctz().IsSupported()) {
      return graph()->NewNode(m->Word64CtzLowerable().placeholder(), input,
                              control());
    } else if (m->Word64ReverseBits().IsSupported()) {
      Node* reversed = graph()->NewNode(m->Word64ReverseBits().op(), input);
      Node* result = m->Is64() ? graph()->NewNode(m->Word64Clz(), reversed)
                               : graph()->NewNode(m->Word64ClzLowerable(),
                                                  reversed, control());
      return result;
    } else {
      return BuildI64Ctz(input);
    }
  }
  case wasm::kExprI64Popcnt: {
    OptionalOperator popcnt64 = m->Word64Popcnt();
    if (popcnt64.IsSupported()) {
      op = popcnt64.op();
    } else if (m->Is32() && m->Word32Popcnt().IsSupported()) {
      op = popcnt64.placeholder();
    } else {
      return BuildI64Popcnt(input);
    }
    break;
  }
  case wasm::kExprI64Eqz:
    return gasm_->Word64Equal(input, Int64Constant(0));
  case wasm::kExprF32SConvertI64:
    if (m->Is32()) {
      return BuildF32SConvertI64(input);
    }
    op = m->RoundInt64ToFloat32();
    break;
  case wasm::kExprF32UConvertI64:
    if (m->Is32()) {
      return BuildF32UConvertI64(input);
    }
    op = m->RoundUint64ToFloat32();
    break;
  case wasm::kExprF64SConvertI64:
    if (m->Is32()) {
      return BuildF64SConvertI64(input);
    }
    op = m->RoundInt64ToFloat64();
    break;
  case wasm::kExprF64UConvertI64:
    if (m->Is32()) {
      return BuildF64UConvertI64(input);
    }
    op = m->RoundUint64ToFloat64();
    break;
  case wasm::kExprI32SExtendI8:
    op = m->SignExtendWord8ToInt32();
    break;
  case wasm::kExprI32SExtendI16:
    op = m->SignExtendWord16ToInt32();
    break;
  case wasm::kExprI64SExtendI8:
    op = m->SignExtendWord8ToInt64();
    break;
  case wasm::kExprI64SExtendI16:
    op = m->SignExtendWord16ToInt64();
    break;
  case wasm::kExprI64SExtendI32:
    op = m->SignExtendWord32ToInt64();
    break;
  case wasm::kExprI64SConvertF32:
  case wasm::kExprI64UConvertF32:
  case wasm::kExprI64SConvertF64:
  case wasm::kExprI64UConvertF64:
  case wasm::kExprI64SConvertSatF32:
  case wasm::kExprI64UConvertSatF32:
  case wasm::kExprI64SConvertSatF64:
  case wasm::kExprI64UConvertSatF64:
    return mcgraph()->machine()->Is32()
               ? BuildCcallConvertFloat(input, position, opcode)
               : BuildIntConvertFloat(input, position, opcode);
  case wasm::kExprRefIsNull:
    return IsNull(input);
  // We abuse ref.as_non_null, which isn't otherwise used in this switch, as
  // a sentinel for the negation of ref.is_null.
  case wasm::kExprRefAsNonNull:
    return gasm_->Int32Sub(gasm_->Int32Constant(1), IsNull(input));
  case wasm::kExprI32AsmjsLoadMem8S:
    return BuildAsmjsLoadMem(MachineType::Int8(), input);
  case wasm::kExprI32AsmjsLoadMem8U:
    return BuildAsmjsLoadMem(MachineType::Uint8(), input);
  case wasm::kExprI32AsmjsLoadMem16S:
    return BuildAsmjsLoadMem(MachineType::Int16(), input);
  case wasm::kExprI32AsmjsLoadMem16U:
    return BuildAsmjsLoadMem(MachineType::Uint16(), input);
  case wasm::kExprI32AsmjsLoadMem:
    return BuildAsmjsLoadMem(MachineType::Int32(), input);
  case wasm::kExprF32AsmjsLoadMem:
    return BuildAsmjsLoadMem(MachineType::Float32(), input);
  case wasm::kExprF64AsmjsLoadMem:
    return BuildAsmjsLoadMem(MachineType::Float64(), input);
  default:
    FATAL_UNSUPPORTED_OPCODE(opcode);
}
return graph()->NewNode(op, input);
1411}

1413Node* WasmGraphBuilder::Float32Constant(float value) {
return mcgraph()->Float32Constant(value);
1415}

1417Node* WasmGraphBuilder::Float64Constant(double value) {
return mcgraph()->Float64Constant(value);
1419}

1421Node* WasmGraphBuilder::Simd128Constant(const uint8_t value[16]) {
has_simd_ = true;
return graph()->NewNode(mcgraph()->machine()->S128Const(value));
1424}

1426Node* WasmGraphBuilder::BranchNoHint(Node* cond, Node** true_node,
                                   Node** false_node) {
return gasm_->Branch(cond, true_node, false_node, BranchHint::kNone);
1429}

1431Node* WasmGraphBuilder::BranchExpectFalse(Node* cond, Node** true_node,
                                        Node** false_node) {
return gasm_->Branch(cond, true_node, false_node, BranchHint::kFalse);
1434}

1436Node* WasmGraphBuilder::BranchExpectTrue(Node* cond, Node** true_node,
                                       Node** false_node) {
return gasm_->Branch(cond, true_node, false_node, BranchHint::kTrue);
1439}

1441Node* WasmGraphBuilder::Select(Node *cond, Node* true_node,
                             Node* false_node, wasm::ValueType type) {
MachineOperatorBuilder* m = mcgraph()->machine();
wasm::ValueKind kind = type.kind();
// Lower to select if supported.
if (kind == wasm::kF32 && m->Float32Select().IsSupported()) {
  return mcgraph()->graph()->NewNode(m->Float32Select().op(), cond,
                                     true_node, false_node);
}
if (kind == wasm::kF64 && m->Float64Select().IsSupported()) {
  return mcgraph()->graph()->NewNode(m->Float64Select().op(), cond,
                                     true_node, false_node);
}
if (kind == wasm::kI32 && m->Word32Select().IsSupported()) {
  return mcgraph()->graph()->NewNode(m->Word32Select().op(), cond, true_node,
                                     false_node);
}
if (kind == wasm::kI64 && m->Word64Select().IsSupported()) {
  return mcgraph()->graph()->NewNode(m->Word64Select().op(), cond, true_node,
                                     false_node);
}
// Default to control-flow.
Node* controls[2];
BranchNoHint(cond, &controls[0], &controls[1]);
Node* merge = Merge(2, controls);
SetControl(merge);
Node* inputs[] = {true_node, false_node, merge};
return Phi(type, 2, inputs);
1469}

1471TrapId WasmGraphBuilder::GetTrapIdForTrap(wasm::TrapReason reason) {
// TODO(wasm): "!env_" should not happen when compiling an actual wasm
// function.
if (!env_ || !env_->runtime_exception_support) {
  // We use TrapId::kInvalid as a marker to tell the code generator
  // to generate a call to a testing c-function instead of a runtime
  // stub. This code should only be called from a cctest.
  return TrapId::kInvalid;
}

switch (reason) {
1482#define TRAPREASON_TO_TRAPID(name)                                             \
case wasm::k##name:                                                          \
  static_assert(                                                             \
      static_cast<int>(TrapId::k##name) == wasm::WasmCode::kThrowWasm##name, \
      "trap id mismatch");                                                   \
  return TrapId::k##name;
  FOREACH_WASM_TRAPREASON(TRAPREASON_TO_TRAPID)TRAPREASON_TO_TRAPID(TrapUnreachable) TRAPREASON_TO_TRAPID(TrapMemOutOfBounds
) TRAPREASON_TO_TRAPID(TrapUnalignedAccess) TRAPREASON_TO_TRAPID
(TrapDivByZero) TRAPREASON_TO_TRAPID(TrapDivUnrepresentable) TRAPREASON_TO_TRAPID
(TrapRemByZero) TRAPREASON_TO_TRAPID(TrapFloatUnrepresentable
) TRAPREASON_TO_TRAPID(TrapFuncSigMismatch) TRAPREASON_TO_TRAPID
(TrapDataSegmentOutOfBounds) TRAPREASON_TO_TRAPID(TrapElemSegmentDropped
) TRAPREASON_TO_TRAPID(TrapTableOutOfBounds) TRAPREASON_TO_TRAPID
(TrapRethrowNull) TRAPREASON_TO_TRAPID(TrapNullDereference) TRAPREASON_TO_TRAPID
(TrapIllegalCast) TRAPREASON_TO_TRAPID(TrapArrayOutOfBounds) TRAPREASON_TO_TRAPID
(TrapArrayTooLarge)
1489#undef TRAPREASON_TO_TRAPID
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
1493}

1495void WasmGraphBuilder::TrapIfTrue(wasm::TrapReason reason, Node* cond,
                                wasm::WasmCodePosition position) {
TrapId trap_id = GetTrapIdForTrap(reason);
Node* node = SetControl(graph()->NewNode(mcgraph()->common()->TrapIf(trap_id),
                                         cond, effect(), control()));
SetSourcePosition(node, position);
1501}

1503void WasmGraphBuilder::TrapIfFalse(wasm::TrapReason reason, Node* cond,
                                 wasm::WasmCodePosition position) {
TrapId trap_id = GetTrapIdForTrap(reason);
Node* node = SetControl(graph()->NewNode(
    mcgraph()->common()->TrapUnless(trap_id), cond, effect(), control()));
SetSourcePosition(node, position);
1509}

1511// Add a check that traps if {node} is equal to {val}.
1512void WasmGraphBuilder::TrapIfEq32(wasm::TrapReason reason, Node* node,
                                int32_t val,
                                wasm::WasmCodePosition position) {
Int32Matcher m(node);
if (m.HasResolvedValue() && !m.Is(val)) return;
if (val == 0) {
  TrapIfFalse(reason, node, position);
} else {
  TrapIfTrue(reason, gasm_->Word32Equal(node, Int32Constant(val)), position);
}
1522}

1524// Add a check that traps if {node} is zero.
1525void WasmGraphBuilder::ZeroCheck32(wasm::TrapReason reason, Node* node,
                                 wasm::WasmCodePosition position) {
TrapIfEq32(reason, node, 0, position);
1528}

1530// Add a check that traps if {node} is equal to {val}.
1531void WasmGraphBuilder::TrapIfEq64(wasm::TrapReason reason, Node* node,
                                int64_t val,
                                wasm::WasmCodePosition position) {
Int64Matcher m(node);
if (m.HasResolvedValue() && !m.Is(val)) return;
TrapIfTrue(reason, gasm_->Word64Equal(node, Int64Constant(val)), position);
1537}

1539// Add a check that traps if {node} is zero.
1540void WasmGraphBuilder::ZeroCheck64(wasm::TrapReason reason, Node* node,
                                 wasm::WasmCodePosition position) {
TrapIfEq64(reason, node, 0, position);
1543}

1545Node* WasmGraphBuilder::Switch(unsigned count, Node* key) {
// The instruction selector will use {kArchTableSwitch} for large switches,
// which has limited input count, see {InstructionSelector::EmitTableSwitch}.
DCHECK_LE(count, Instruction::kMaxInputCount - 2)((void) 0);          // value_range + 2
DCHECK_LE(count, wasm::kV8MaxWasmFunctionBrTableSize + 1)((void) 0);  // plus IfDefault
return graph()->NewNode(mcgraph()->common()->Switch(count), key, control());
1551}

1553Node* WasmGraphBuilder::IfValue(int32_t value, Node* sw) {
DCHECK_EQ(IrOpcode::kSwitch, sw->opcode())((void) 0);
return graph()->NewNode(mcgraph()->common()->IfValue(value), sw);
1556}

1558Node* WasmGraphBuilder::IfDefault(Node* sw) {
DCHECK_EQ(IrOpcode::kSwitch, sw->opcode())((void) 0);
return graph()->NewNode(mcgraph()->common()->IfDefault(), sw);
1561}

1563Node* WasmGraphBuilder::Return(base::Vector<Node*> vals) {
unsigned count = static_cast<unsigned>(vals.size());
base::SmallVector<Node*, 8> buf(count + 3);

buf[0] = Int32Constant(0);
if (count > 0) {
  memcpy(buf.data() + 1, vals.begin(), sizeof(void*) * count);
}
buf[count + 1] = effect();
buf[count + 2] = control();
Node* ret = graph()->NewNode(mcgraph()->common()->Return(count), count + 3,
                             buf.data());

gasm_->MergeControlToEnd(ret);
return ret;
1578}

1580void WasmGraphBuilder::Trap(wasm::TrapReason reason,
                          wasm::WasmCodePosition position) {
TrapIfFalse(reason, Int32Constant(0), position);
// Connect control to end via a Throw() node.
TerminateThrow(effect(), control());
1585}

1587Node* WasmGraphBuilder::MaskShiftCount32(Node* node) {
static const int32_t kMask32 = 0x1F;
if (!mcgraph()->machine()->Word32ShiftIsSafe()) {
  // Shifts by constants are so common we pattern-match them here.
  Int32Matcher match(node);
  if (match.HasResolvedValue()) {
    int32_t masked = (match.ResolvedValue() & kMask32);
    if (match.ResolvedValue() != masked) node = Int32Constant(masked);
  } else {
    node = gasm_->Word32And(node, Int32Constant(kMask32));
  }
}
return node;
1600}

1602Node* WasmGraphBuilder::MaskShiftCount64(Node* node) {
static const int64_t kMask64 = 0x3F;
if (!mcgraph()->machine()->Word32ShiftIsSafe()) {
  // Shifts by constants are so common we pattern-match them here.
  Int64Matcher match(node);
  if (match.HasResolvedValue()) {
    int64_t masked = (match.ResolvedValue() & kMask64);
    if (match.ResolvedValue() != masked) node = Int64Constant(masked);
  } else {
    node = gasm_->Word64And(node, Int64Constant(kMask64));
  }
}
return node;
1615}

1617namespace {

1619bool ReverseBytesSupported(MachineOperatorBuilder* m, size_t size_in_bytes) {
switch (size_in_bytes) {
  case 4:
  case 16:
    return true;
  case 8:
    return m->Is64();
  default:
    break;
}
return false;
1630}

1632}  // namespace

1634Node* WasmGraphBuilder::BuildChangeEndiannessStore(
  Node* node, MachineRepresentation mem_rep, wasm::ValueType wasmtype) {
Node* result;
Node* value = node;
MachineOperatorBuilder* m = mcgraph()->machine();
int valueSizeInBytes = wasmtype.value_kind_size();
int valueSizeInBits = 8 * valueSizeInBytes;
bool isFloat = false;

switch (wasmtype.kind()) {
  case wasm::kF64:
    value = gasm_->BitcastFloat64ToInt64(node);
    isFloat = true;
    V8_FALLTHROUGH[[clang::fallthrough]];
  case wasm::kI64:
    result = Int64Constant(0);
    break;
  case wasm::kF32:
    value = gasm_->BitcastFloat32ToInt32(node);
    isFloat = true;
    V8_FALLTHROUGH[[clang::fallthrough]];
  case wasm::kI32:
    result = Int32Constant(0);
    break;
  case wasm::kS128:
    DCHECK(ReverseBytesSupported(m, valueSizeInBytes))((void) 0);
    break;
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}

if (mem_rep == MachineRepresentation::kWord8) {
  // No need to change endianness for byte size, return original node
  return node;
}
if (wasmtype == wasm::kWasmI64 && mem_rep < MachineRepresentation::kWord64) {
  // In case we store lower part of WasmI64 expression, we can truncate
  // upper 32bits
  value = gasm_->TruncateInt64ToInt32(value);
  valueSizeInBytes = wasm::kWasmI32.value_kind_size();
  valueSizeInBits = 8 * valueSizeInBytes;
  if (mem_rep == MachineRepresentation::kWord16) {
    value = gasm_->Word32Shl(value, Int32Constant(16));
  }
} else if (wasmtype == wasm::kWasmI32 &&
           mem_rep == MachineRepresentation::kWord16) {
  value = gasm_->Word32Shl(value, Int32Constant(16));
}

int i;
uint32_t shiftCount;

if (ReverseBytesSupported(m, valueSizeInBytes)) {
  switch (valueSizeInBytes) {
    case 4:
      result = gasm_->Word32ReverseBytes(value);
      break;
    case 8:
      result = gasm_->Word64ReverseBytes(value);
      break;
    case 16:
      result = graph()->NewNode(m->Simd128ReverseBytes(), value);
      break;
    default:
      UNREACHABLE()V8_Fatal("unreachable code");
  }
} else {
  for (i = 0, shiftCount = valueSizeInBits - 8; i < valueSizeInBits / 2;
       i += 8, shiftCount -= 16) {
    Node* shiftLower;
    Node* shiftHigher;
    Node* lowerByte;
    Node* higherByte;

    DCHECK_LT(0, shiftCount)((void) 0);
    DCHECK_EQ(0, (shiftCount + 8) % 16)((void) 0);

    if (valueSizeInBits > 32) {
      shiftLower = gasm_->Word64Shl(value, Int64Constant(shiftCount));
      shiftHigher = gasm_->Word64Shr(value, Int64Constant(shiftCount));
      lowerByte = gasm_->Word64And(
          shiftLower, Int64Constant(static_cast<uint64_t>(0xFF)
                                    << (valueSizeInBits - 8 - i)));
      higherByte = gasm_->Word64And(
          shiftHigher, Int64Constant(static_cast<uint64_t>(0xFF) << i));
      result = gasm_->Word64Or(result, lowerByte);
      result = gasm_->Word64Or(result, higherByte);
    } else {
      shiftLower = gasm_->Word32Shl(value, Int32Constant(shiftCount));
      shiftHigher = gasm_->Word32Shr(value, Int32Constant(shiftCount));
      lowerByte = gasm_->Word32And(
          shiftLower, Int32Constant(static_cast<uint32_t>(0xFF)
                                    << (valueSizeInBits - 8 - i)));
      higherByte = gasm_->Word32And(
          shiftHigher, Int32Constant(static_cast<uint32_t>(0xFF) << i));
      result = gasm_->Word32Or(result, lowerByte);
      result = gasm_->Word32Or(result, higherByte);
    }
  }
}

if (isFloat) {
  switch (wasmtype.kind()) {
    case wasm::kF64:
      result = gasm_->BitcastInt64ToFloat64(result);
      break;
    case wasm::kF32:
      result = gasm_->BitcastInt32ToFloat32(result);
      break;
    default:
      UNREACHABLE()V8_Fatal("unreachable code");
  }
}

return result;
1749}

1751Node* WasmGraphBuilder::BuildChangeEndiannessLoad(Node* node,
                                                MachineType memtype,
                                                wasm::ValueType wasmtype) {
Node* result;
1
'result' declared without an initial value→
Node* value = node;
MachineOperatorBuilder* m = mcgraph()->machine();
int valueSizeInBytes = ElementSizeInBytes(memtype.representation());
int valueSizeInBits = 8 * valueSizeInBytes;
bool isFloat = false;

switch (memtype.representation()) {
2
←
Control jumps to 'case kSimd128:'  at line 1780→
  case MachineRepresentation::kFloat64:
    value = gasm_->BitcastFloat64ToInt64(node);
    isFloat = true;
    V8_FALLTHROUGH[[clang::fallthrough]];
  case MachineRepresentation::kWord64:
    result = Int64Constant(0);
    break;
  case MachineRepresentation::kFloat32:
    value = gasm_->BitcastFloat32ToInt32(node);
    isFloat = true;
    V8_FALLTHROUGH[[clang::fallthrough]];
  case MachineRepresentation::kWord32:
  case MachineRepresentation::kWord16:
    result = Int32Constant(0);
    break;
  case MachineRepresentation::kWord8:
    // No need to change endianness for byte size, return original node
    return node;
  case MachineRepresentation::kSimd128:
    DCHECK(ReverseBytesSupported(m, valueSizeInBytes))((void) 0);
    break;
3
←
 Execution continues on line 1787→
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}

int i;
uint32_t shiftCount;

if (ReverseBytesSupported(m, valueSizeInBytes < 4 ? 4 : valueSizeInBytes)) {
4
←
Assuming 'valueSizeInBytes' is >= 4→
5
←
'?' condition is false→
6
←
Taking false branch→
  switch (valueSizeInBytes) {
    case 2:
      result = gasm_->Word32ReverseBytes(
          gasm_->Word32Shl(value, Int32Constant(16)));
      break;
    case 4:
      result = gasm_->Word32ReverseBytes(value);
      break;
    case 8:
      result = gasm_->Word64ReverseBytes(value);
      break;
    case 16:
      result = graph()->NewNode(m->Simd128ReverseBytes(), value);
      break;
    default:
      UNREACHABLE()V8_Fatal("unreachable code");
  }
} else {
  for (i = 0, shiftCount = valueSizeInBits - 8; i < valueSizeInBits / 2;
7
←
Assuming the condition is false→
8
←
Loop condition is false. Execution continues on line 1843→
       i += 8, shiftCount -= 16) {
    Node* shiftLower;
    Node* shiftHigher;
    Node* lowerByte;
    Node* higherByte;

    DCHECK_LT(0, shiftCount)((void) 0);
    DCHECK_EQ(0, (shiftCount + 8) % 16)((void) 0);

    if (valueSizeInBits > 32) {
      shiftLower = gasm_->Word64Shl(value, Int64Constant(shiftCount));
      shiftHigher = gasm_->Word64Shr(value, Int64Constant(shiftCount));
      lowerByte = gasm_->Word64And(
          shiftLower, Int64Constant(static_cast<uint64_t>(0xFF)
                                    << (valueSizeInBits - 8 - i)));
      higherByte = gasm_->Word64And(
          shiftHigher, Int64Constant(static_cast<uint64_t>(0xFF) << i));
      result = gasm_->Word64Or(result, lowerByte);
      result = gasm_->Word64Or(result, higherByte);
    } else {
      shiftLower = gasm_->Word32Shl(value, Int32Constant(shiftCount));
      shiftHigher = gasm_->Word32Shr(value, Int32Constant(shiftCount));
      lowerByte = gasm_->Word32And(
          shiftLower, Int32Constant(static_cast<uint32_t>(0xFF)
                                    << (valueSizeInBits - 8 - i)));
      higherByte = gasm_->Word32And(
          shiftHigher, Int32Constant(static_cast<uint32_t>(0xFF) << i));
      result = gasm_->Word32Or(result, lowerByte);
      result = gasm_->Word32Or(result, higherByte);
    }
  }
}

if (isFloat8.1
'isFloat' is false
) {
9
←
Taking false branch→
  switch (memtype.representation()) {
    case MachineRepresentation::kFloat64:
      result = gasm_->BitcastInt64ToFloat64(result);
      break;
    case MachineRepresentation::kFloat32:
      result = gasm_->BitcastInt32ToFloat32(result);
      break;
    default:
      UNREACHABLE()V8_Fatal("unreachable code");
  }
}

// We need to sign or zero extend the value
if (memtype.IsSigned()) {
10
←
Taking true branch→
  DCHECK(!isFloat)((void) 0);
  if (valueSizeInBits < 32) {
11
←
Assuming 'valueSizeInBits' is >= 32→
12
←
Taking false branch→
    Node* shiftBitCount;
    // Perform sign extension using following trick
    // result = (x << machine_width - type_width) >> (machine_width -
    // type_width)
    if (wasmtype == wasm::kWasmI64) {
      shiftBitCount = Int32Constant(64 - valueSizeInBits);
      result = gasm_->Word64Sar(
          gasm_->Word64Shl(gasm_->ChangeInt32ToInt64(result), shiftBitCount),
          shiftBitCount);
    } else if (wasmtype == wasm::kWasmI32) {
      shiftBitCount = Int32Constant(32 - valueSizeInBits);
      result = gasm_->Word32Sar(gasm_->Word32Shl(result, shiftBitCount),
                                shiftBitCount);
    }
  }
} else if (wasmtype == wasm::kWasmI64 && valueSizeInBits < 64) {
  result = gasm_->ChangeUint32ToUint64(result);
}

return result;
13
←
Undefined or garbage value returned to caller
1880}

1882Node* WasmGraphBuilder::BuildF32CopySign(Node* left, Node* right) {
Node* result = Unop(
    wasm::kExprF32ReinterpretI32,
    Binop(wasm::kExprI32Ior,
          Binop(wasm::kExprI32And, Unop(wasm::kExprI32ReinterpretF32, left),
                Int32Constant(0x7FFFFFFF)),
          Binop(wasm::kExprI32And, Unop(wasm::kExprI32ReinterpretF32, right),
                Int32Constant(0x80000000))));

return result;
1892}

1894Node* WasmGraphBuilder::BuildF64CopySign(Node* left, Node* right) {
if (mcgraph()->machine()->Is64()) {
  return gasm_->BitcastInt64ToFloat64(
      gasm_->Word64Or(gasm_->Word64And(gasm_->BitcastFloat64ToInt64(left),
                                       Int64Constant(0x7FFFFFFFFFFFFFFF)),
                      gasm_->Word64And(gasm_->BitcastFloat64ToInt64(right),
                                       Int64Constant(0x8000000000000000))));
}

DCHECK(mcgraph()->machine()->Is32())((void) 0);

Node* high_word_left = gasm_->Float64ExtractHighWord32(left);
Node* high_word_right = gasm_->Float64ExtractHighWord32(right);

Node* new_high_word = gasm_->Word32Or(
    gasm_->Word32And(high_word_left, Int32Constant(0x7FFFFFFF)),
    gasm_->Word32And(high_word_right, Int32Constant(0x80000000)));

return gasm_->Float64InsertHighWord32(left, new_high_word);
1913}

1915namespace {

1917MachineType IntConvertType(wasm::WasmOpcode opcode) {
switch (opcode) {
  case wasm::kExprI32SConvertF32:
  case wasm::kExprI32SConvertF64:
  case wasm::kExprI32SConvertSatF32:
  case wasm::kExprI32SConvertSatF64:
    return MachineType::Int32();
  case wasm::kExprI32UConvertF32:
  case wasm::kExprI32UConvertF64:
  case wasm::kExprI32UConvertSatF32:
  case wasm::kExprI32UConvertSatF64:
    return MachineType::Uint32();
  case wasm::kExprI64SConvertF32:
  case wasm::kExprI64SConvertF64:
  case wasm::kExprI64SConvertSatF32:
  case wasm::kExprI64SConvertSatF64:
    return MachineType::Int64();
  case wasm::kExprI64UConvertF32:
  case wasm::kExprI64UConvertF64:
  case wasm::kExprI64UConvertSatF32:
  case wasm::kExprI64UConvertSatF64:
    return MachineType::Uint64();
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
1942}

1944MachineType FloatConvertType(wasm::WasmOpcode opcode) {
switch (opcode) {
  case wasm::kExprI32SConvertF32:
  case wasm::kExprI32UConvertF32:
  case wasm::kExprI32SConvertSatF32:
  case wasm::kExprI64SConvertF32:
  case wasm::kExprI64UConvertF32:
  case wasm::kExprI32UConvertSatF32:
  case wasm::kExprI64SConvertSatF32:
  case wasm::kExprI64UConvertSatF32:
    return MachineType::Float32();
  case wasm::kExprI32SConvertF64:
  case wasm::kExprI32UConvertF64:
  case wasm::kExprI64SConvertF64:
  case wasm::kExprI64UConvertF64:
  case wasm::kExprI32SConvertSatF64:
  case wasm::kExprI32UConvertSatF64:
  case wasm::kExprI64SConvertSatF64:
  case wasm::kExprI64UConvertSatF64:
    return MachineType::Float64();
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
1967}

1969const Operator* ConvertOp(WasmGraphBuilder* builder, wasm::WasmOpcode opcode) {
switch (opcode) {
  case wasm::kExprI32SConvertF32:
    return builder->mcgraph()->machine()->TruncateFloat32ToInt32(
        TruncateKind::kSetOverflowToMin);
  case wasm::kExprI32SConvertSatF32:
    return builder->mcgraph()->machine()->TruncateFloat32ToInt32(
        TruncateKind::kArchitectureDefault);
  case wasm::kExprI32UConvertF32:
    return builder->mcgraph()->machine()->TruncateFloat32ToUint32(
        TruncateKind::kSetOverflowToMin);
  case wasm::kExprI32UConvertSatF32:
    return builder->mcgraph()->machine()->TruncateFloat32ToUint32(
        TruncateKind::kArchitectureDefault);
  case wasm::kExprI32SConvertF64:
  case wasm::kExprI32SConvertSatF64:
    return builder->mcgraph()->machine()->ChangeFloat64ToInt32();
  case wasm::kExprI32UConvertF64:
  case wasm::kExprI32UConvertSatF64:
    return builder->mcgraph()->machine()->TruncateFloat64ToUint32();
  case wasm::kExprI64SConvertF32:
  case wasm::kExprI64SConvertSatF32:
    return builder->mcgraph()->machine()->TryTruncateFloat32ToInt64();
  case wasm::kExprI64UConvertF32:
  case wasm::kExprI64UConvertSatF32:
    return builder->mcgraph()->machine()->TryTruncateFloat32ToUint64();
  case wasm::kExprI64SConvertF64:
  case wasm::kExprI64SConvertSatF64:
    return builder->mcgraph()->machine()->TryTruncateFloat64ToInt64();
  case wasm::kExprI64UConvertF64:
  case wasm::kExprI64UConvertSatF64:
    return builder->mcgraph()->machine()->TryTruncateFloat64ToUint64();
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
2004}

2006wasm::WasmOpcode ConvertBackOp(wasm::WasmOpcode opcode) {
switch (opcode) {
  case wasm::kExprI32SConvertF32:
  case wasm::kExprI32SConvertSatF32:
    return wasm::kExprF32SConvertI32;
  case wasm::kExprI32UConvertF32:
  case wasm::kExprI32UConvertSatF32:
    return wasm::kExprF32UConvertI32;
  case wasm::kExprI32SConvertF64:
  case wasm::kExprI32SConvertSatF64:
    return wasm::kExprF64SConvertI32;
  case wasm::kExprI32UConvertF64:
  case wasm::kExprI32UConvertSatF64:
    return wasm::kExprF64UConvertI32;
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
2023}

2025bool IsTrappingConvertOp(wasm::WasmOpcode opcode) {
switch (opcode) {
  case wasm::kExprI32SConvertF32:
  case wasm::kExprI32UConvertF32:
  case wasm::kExprI32SConvertF64:
  case wasm::kExprI32UConvertF64:
  case wasm::kExprI64SConvertF32:
  case wasm::kExprI64UConvertF32:
  case wasm::kExprI64SConvertF64:
  case wasm::kExprI64UConvertF64:
    return true;
  case wasm::kExprI32SConvertSatF64:
  case wasm::kExprI32UConvertSatF64:
  case wasm::kExprI32SConvertSatF32:
  case wasm::kExprI32UConvertSatF32:
  case wasm::kExprI64SConvertSatF32:
  case wasm::kExprI64UConvertSatF32:
  case wasm::kExprI64SConvertSatF64:
  case wasm::kExprI64UConvertSatF64:
    return false;
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
2048}

2050Node* Zero(WasmGraphBuilder* builder, const MachineType& ty) {
switch (ty.representation()) {
  case MachineRepresentation::kWord32:
    return builder->Int32Constant(0);
  case MachineRepresentation::kWord64:
    return builder->Int64Constant(0);
  case MachineRepresentation::kFloat32:
    return builder->Float32Constant(0.0);
  case MachineRepresentation::kFloat64:
    return builder->Float64Constant(0.0);
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
2063}

2065Node* Min(WasmGraphBuilder* builder, const MachineType& ty) {
switch (ty.semantic()) {
  case MachineSemantic::kInt32:
    return builder->Int32Constant(std::numeric_limits<int32_t>::min());
  case MachineSemantic::kUint32:
    return builder->Int32Constant(std::numeric_limits<uint32_t>::min());
  case MachineSemantic::kInt64:
    return builder->Int64Constant(std::numeric_limits<int64_t>::min());
  case MachineSemantic::kUint64:
    return builder->Int64Constant(std::numeric_limits<uint64_t>::min());
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
2078}

2080Node* Max(WasmGraphBuilder* builder, const MachineType& ty) {
switch (ty.semantic()) {
  case MachineSemantic::kInt32:
    return builder->Int32Constant(std::numeric_limits<int32_t>::max());
  case MachineSemantic::kUint32:
    return builder->Int32Constant(std::numeric_limits<uint32_t>::max());
  case MachineSemantic::kInt64:
    return builder->Int64Constant(std::numeric_limits<int64_t>::max());
  case MachineSemantic::kUint64:
    return builder->Int64Constant(std::numeric_limits<uint64_t>::max());
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
2093}

2095wasm::WasmOpcode TruncOp(const MachineType& ty) {
switch (ty.representation()) {
  case MachineRepresentation::kFloat32:
    return wasm::kExprF32Trunc;
  case MachineRepresentation::kFloat64:
    return wasm::kExprF64Trunc;
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
2104}

2106wasm::WasmOpcode NeOp(const MachineType& ty) {
switch (ty.representation()) {
  case MachineRepresentation::kFloat32:
    return wasm::kExprF32Ne;
  case MachineRepresentation::kFloat64:
    return wasm::kExprF64Ne;
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
2115}

2117wasm::WasmOpcode LtOp(const MachineType& ty) {
switch (ty.representation()) {
  case MachineRepresentation::kFloat32:
    return wasm::kExprF32Lt;
  case MachineRepresentation::kFloat64:
    return wasm::kExprF64Lt;
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
2126}

2128Node* ConvertTrapTest(WasmGraphBuilder* builder, wasm::WasmOpcode opcode,
                    const MachineType& int_ty, const MachineType& float_ty,
                    Node* trunc, Node* converted_value) {
if (int_ty.representation() == MachineRepresentation::kWord32) {
  Node* check = builder->Unop(ConvertBackOp(opcode), converted_value);
  return builder->Binop(NeOp(float_ty), trunc, check);
}
return builder->graph()->NewNode(builder->mcgraph()->common()->Projection(1),
                                 trunc, builder->graph()->start());
2137}

2139Node* ConvertSaturateTest(WasmGraphBuilder* builder, wasm::WasmOpcode opcode,
                        const MachineType& int_ty,
                        const MachineType& float_ty, Node* trunc,
                        Node* converted_value) {
Node* test = ConvertTrapTest(builder, opcode, int_ty, float_ty, trunc,
                             converted_value);
if (int_ty.representation() == MachineRepresentation::kWord64) {
  test = builder->Binop(wasm::kExprI64Eq, test, builder->Int64Constant(0));
}
return test;
2149}

2151}  // namespace

2153Node* WasmGraphBuilder::BuildIntConvertFloat(Node* input,
                                           wasm::WasmCodePosition position,
                                           wasm::WasmOpcode opcode) {
const MachineType int_ty = IntConvertType(opcode);
const MachineType float_ty = FloatConvertType(opcode);
const Operator* conv_op = ConvertOp(this, opcode);
Node* trunc = nullptr;
Node* converted_value = nullptr;
const bool is_int32 =
    int_ty.representation() == MachineRepresentation::kWord32;
if (is_int32) {
  trunc = Unop(TruncOp(float_ty), input);
  converted_value = graph()->NewNode(conv_op, trunc);
} else {
  trunc = graph()->NewNode(conv_op, input);
  converted_value = graph()->NewNode(mcgraph()->common()->Projection(0),
                                     trunc, graph()->start());
}
if (IsTrappingConvertOp(opcode)) {
  Node* test =
      ConvertTrapTest(this, opcode, int_ty, float_ty, trunc, converted_value);
  if (is_int32) {
    TrapIfTrue(wasm::kTrapFloatUnrepresentable, test, position);
  } else {
    ZeroCheck64(wasm::kTrapFloatUnrepresentable, test, position);
  }
  return converted_value;
}
if (mcgraph()->machine()->SatConversionIsSafe()) {
  return converted_value;
}
Node* test = ConvertSaturateTest(this, opcode, int_ty, float_ty, trunc,
                                 converted_value);
Diamond tl_d(graph(), mcgraph()->common(), test, BranchHint::kFalse);
tl_d.Chain(control());
Node* nan_test = Binop(NeOp(float_ty), input, input);
Diamond nan_d(graph(), mcgraph()->common(), nan_test, BranchHint::kFalse);
nan_d.Nest(tl_d, true);
Node* neg_test = Binop(LtOp(float_ty), input, Zero(this, float_ty));
Diamond sat_d(graph(), mcgraph()->common(), neg_test, BranchHint::kNone);
sat_d.Nest(nan_d, false);
Node* sat_val =
    sat_d.Phi(int_ty.representation(), Min(this, int_ty), Max(this, int_ty));
Node* nan_val =
    nan_d.Phi(int_ty.representation(), Zero(this, int_ty), sat_val);
return tl_d.Phi(int_ty.representation(), nan_val, converted_value);
2199}

2201Node* WasmGraphBuilder::BuildI32AsmjsSConvertF32(Node* input) {
// asm.js must use the wacky JS semantics.
return gasm_->TruncateFloat64ToWord32(gasm_->ChangeFloat32ToFloat64(input));
2204}

2206Node* WasmGraphBuilder::BuildI32AsmjsSConvertF64(Node* input) {
// asm.js must use the wacky JS semantics.
return gasm_->TruncateFloat64ToWord32(input);
2209}

2211Node* WasmGraphBuilder::BuildI32AsmjsUConvertF32(Node* input) {
// asm.js must use the wacky JS semantics.
return gasm_->TruncateFloat64ToWord32(gasm_->ChangeFloat32ToFloat64(input));
2214}

2216Node* WasmGraphBuilder::BuildI32AsmjsUConvertF64(Node* input) {
// asm.js must use the wacky JS semantics.
return gasm_->TruncateFloat64ToWord32(input);
2219}

2221Node* WasmGraphBuilder::BuildBitCountingCall(Node* input, ExternalReference ref,
                                           MachineRepresentation input_type) {
Node* stack_slot_param = StoreArgsInStackSlot({{input_type, input}});

MachineType sig_types[] = {MachineType::Int32(), MachineType::Pointer()};
MachineSignature sig(1, 1, sig_types);

Node* function = gasm_->ExternalConstant(ref);

return BuildCCall(&sig, function, stack_slot_param);
2231}

2233Node* WasmGraphBuilder::BuildI32Ctz(Node* input) {
return BuildBitCountingCall(input, ExternalReference::wasm_word32_ctz(),
                            MachineRepresentation::kWord32);
2236}

2238Node* WasmGraphBuilder::BuildI64Ctz(Node* input) {
return Unop(wasm::kExprI64UConvertI32,
            BuildBitCountingCall(input, ExternalReference::wasm_word64_ctz(),
                                 MachineRepresentation::kWord64));
2242}

2244Node* WasmGraphBuilder::BuildI32Popcnt(Node* input) {
return BuildBitCountingCall(input, ExternalReference::wasm_word32_popcnt(),
                            MachineRepresentation::kWord32);
2247}

2249Node* WasmGraphBuilder::BuildI64Popcnt(Node* input) {
return Unop(
    wasm::kExprI64UConvertI32,
    BuildBitCountingCall(input, ExternalReference::wasm_word64_popcnt(),
                         MachineRepresentation::kWord64));
2254}

2256Node* WasmGraphBuilder::BuildF32Trunc(Node* input) {
MachineType type = MachineType::Float32();
ExternalReference ref = ExternalReference::wasm_f32_trunc();

return BuildCFuncInstruction(ref, type, input);
2261}

2263Node* WasmGraphBuilder::BuildF32Floor(Node* input) {
MachineType type = MachineType::Float32();
ExternalReference ref = ExternalReference::wasm_f32_floor();
return BuildCFuncInstruction(ref, type, input);
2267}

2269Node* WasmGraphBuilder::BuildF32Ceil(Node* input) {
MachineType type = MachineType::Float32();
ExternalReference ref = ExternalReference::wasm_f32_ceil();
return BuildCFuncInstruction(ref, type, input);
2273}

2275Node* WasmGraphBuilder::BuildF32NearestInt(Node* input) {
MachineType type = MachineType::Float32();
ExternalReference ref = ExternalReference::wasm_f32_nearest_int();
return BuildCFuncInstruction(ref, type, input);
2279}

2281Node* WasmGraphBuilder::BuildF64Trunc(Node* input) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::wasm_f64_trunc();
return BuildCFuncInstruction(ref, type, input);
2285}

2287Node* WasmGraphBuilder::BuildF64Floor(Node* input) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::wasm_f64_floor();
return BuildCFuncInstruction(ref, type, input);
2291}

2293Node* WasmGraphBuilder::BuildF64Ceil(Node* input) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::wasm_f64_ceil();
return BuildCFuncInstruction(ref, type, input);
2297}

2299Node* WasmGraphBuilder::BuildF64NearestInt(Node* input) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::wasm_f64_nearest_int();
return BuildCFuncInstruction(ref, type, input);
2303}

2305Node* WasmGraphBuilder::BuildF64Acos(Node* input) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::f64_acos_wrapper_function();
return BuildCFuncInstruction(ref, type, input);
2309}

2311Node* WasmGraphBuilder::BuildF64Asin(Node* input) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::f64_asin_wrapper_function();
return BuildCFuncInstruction(ref, type, input);
2315}

2317Node* WasmGraphBuilder::BuildF64Pow(Node* left, Node* right) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::wasm_float64_pow();
return BuildCFuncInstruction(ref, type, left, right);
2321}

2323Node* WasmGraphBuilder::BuildF64Mod(Node* left, Node* right) {
MachineType type = MachineType::Float64();
ExternalReference ref = ExternalReference::f64_mod_wrapper_function();
return BuildCFuncInstruction(ref, type, left, right);
2327}

2329Node* WasmGraphBuilder::BuildCFuncInstruction(ExternalReference ref,
                                            MachineType type, Node* input0,
                                            Node* input1) {
// We do truncation by calling a C function which calculates the result.
// The input is passed to the C function as a byte buffer holding the two
// input doubles. We reserve this byte buffer as a stack slot, store the
// parameters in this buffer slots, pass a pointer to the buffer to the C
// function, and after calling the C function we collect the return value from
// the buffer.
Node* stack_slot;
if (input1) {
  stack_slot = StoreArgsInStackSlot(
      {{type.representation(), input0}, {type.representation(), input1}});
} else {
  stack_slot = StoreArgsInStackSlot({{type.representation(), input0}});
}

MachineType sig_types[] = {MachineType::Pointer()};
MachineSignature sig(0, 1, sig_types);
Node* function = gasm_->ExternalConstant(ref);
BuildCCall(&sig, function, stack_slot);

return gasm_->LoadFromObject(type, stack_slot, 0);
2352}

2354Node* WasmGraphBuilder::BuildF32SConvertI64(Node* input) {
// TODO(titzer/bradnelson): Check handlng of asm.js case.
return BuildIntToFloatConversionInstruction(
    input, ExternalReference::wasm_int64_to_float32(),
    MachineRepresentation::kWord64, MachineType::Float32());
2359}
2360Node* WasmGraphBuilder::BuildF32UConvertI64(Node* input) {
// TODO(titzer/bradnelson): Check handlng of asm.js case.
return BuildIntToFloatConversionInstruction(
    input, ExternalReference::wasm_uint64_to_float32(),
    MachineRepresentation::kWord64, MachineType::Float32());
2365}
2366Node* WasmGraphBuilder::BuildF64SConvertI64(Node* input) {
return BuildIntToFloatConversionInstruction(
    input, ExternalReference::wasm_int64_to_float64(),
    MachineRepresentation::kWord64, MachineType::Float64());
2370}
2371Node* WasmGraphBuilder::BuildF64UConvertI64(Node* input) {
return BuildIntToFloatConversionInstruction(
    input, ExternalReference::wasm_uint64_to_float64(),
    MachineRepresentation::kWord64, MachineType::Float64());
2375}

2377Node* WasmGraphBuilder::BuildIntToFloatConversionInstruction(
  Node* input, ExternalReference ref,
  MachineRepresentation parameter_representation,
  const MachineType result_type) {
int stack_slot_size =
    std::max(ElementSizeInBytes(parameter_representation),
             ElementSizeInBytes(result_type.representation()));
Node* stack_slot =
    graph()->NewNode(mcgraph()->machine()->StackSlot(stack_slot_size));
auto store_rep =
    StoreRepresentation(parameter_representation, kNoWriteBarrier);
gasm_->Store(store_rep, stack_slot, 0, input);
MachineType sig_types[] = {MachineType::Pointer()};
MachineSignature sig(0, 1, sig_types);
Node* function = gasm_->ExternalConstant(ref);
BuildCCall(&sig, function, stack_slot);
return gasm_->LoadFromObject(result_type, stack_slot, 0);
2394}

2396namespace {

2398ExternalReference convert_ccall_ref(wasm::WasmOpcode opcode) {
switch (opcode) {
  case wasm::kExprI64SConvertF32:
  case wasm::kExprI64SConvertSatF32:
    return ExternalReference::wasm_float32_to_int64();
  case wasm::kExprI64UConvertF32:
  case wasm::kExprI64UConvertSatF32:
    return ExternalReference::wasm_float32_to_uint64();
  case wasm::kExprI64SConvertF64:
  case wasm::kExprI64SConvertSatF64:
    return ExternalReference::wasm_float64_to_int64();
  case wasm::kExprI64UConvertF64:
  case wasm::kExprI64UConvertSatF64:
    return ExternalReference::wasm_float64_to_uint64();
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
2415}

2417}  // namespace

2419Node* WasmGraphBuilder::BuildCcallConvertFloat(Node* input,
                                             wasm::WasmCodePosition position,
                                             wasm::WasmOpcode opcode) {
const MachineType int_ty = IntConvertType(opcode);
const MachineType float_ty = FloatConvertType(opcode);
ExternalReference call_ref = convert_ccall_ref(opcode);
int stack_slot_size = std::max(ElementSizeInBytes(int_ty.representation()),
                               ElementSizeInBytes(float_ty.representation()));
Node* stack_slot =
    graph()->NewNode(mcgraph()->machine()->StackSlot(stack_slot_size));
auto store_rep =
    StoreRepresentation(float_ty.representation(), kNoWriteBarrier);
gasm_->Store(store_rep, stack_slot, 0, input);
MachineType sig_types[] = {MachineType::Int32(), MachineType::Pointer()};
MachineSignature sig(1, 1, sig_types);
Node* function = gasm_->ExternalConstant(call_ref);
Node* overflow = BuildCCall(&sig, function, stack_slot);
if (IsTrappingConvertOp(opcode)) {
  ZeroCheck32(wasm::kTrapFloatUnrepresentable, overflow, position);
  return gasm_->LoadFromObject(int_ty, stack_slot, 0);
}
Node* test = Binop(wasm::kExprI32Eq, overflow, Int32Constant(0), position);
Diamond tl_d(graph(), mcgraph()->common(), test, BranchHint::kFalse);
tl_d.Chain(control());
Node* nan_test = Binop(NeOp(float_ty), input, input);
Diamond nan_d(graph(), mcgraph()->common(), nan_test, BranchHint::kFalse);
nan_d.Nest(tl_d, true);
Node* neg_test = Binop(LtOp(float_ty), input, Zero(this, float_ty));
Diamond sat_d(graph(), mcgraph()->common(), neg_test, BranchHint::kNone);
sat_d.Nest(nan_d, false);
Node* sat_val =
    sat_d.Phi(int_ty.representation(), Min(this, int_ty), Max(this, int_ty));
Node* load = gasm_->LoadFromObject(int_ty, stack_slot, 0);
Node* nan_val =
    nan_d.Phi(int_ty.representation(), Zero(this, int_ty), sat_val);
return tl_d.Phi(int_ty.representation(), nan_val, load);
2455}

2457Node* WasmGraphBuilder::MemoryGrow(Node* input) {
needs_stack_check_ = true;
if (!env_->module->is_memory64) {
  // For 32-bit memories, just call the builtin.
  return gasm_->CallRuntimeStub(wasm::WasmCode::kWasmMemoryGrow,
                                Operator::kNoThrow, input);
}

// If the input is not a positive int32, growing will always fail
// (growing negative or requesting >= 256 TB).
Node* old_effect = effect();
Diamond is_32_bit(graph(), mcgraph()->common(),
                  gasm_->Uint64LessThanOrEqual(input, Int64Constant(kMaxInt)),
                  BranchHint::kTrue);
is_32_bit.Chain(control());

SetControl(is_32_bit.if_true);

Node* grow_result = gasm_->ChangeInt32ToInt64(gasm_->CallRuntimeStub(
    wasm::WasmCode::kWasmMemoryGrow, Operator::kNoThrow,
    gasm_->TruncateInt64ToInt32(input)));

Node* diamond_result = is_32_bit.Phi(MachineRepresentation::kWord64,
                                     grow_result, gasm_->Int64Constant(-1));
SetEffectControl(is_32_bit.EffectPhi(effect(), old_effect), is_32_bit.merge);
return diamond_result;
2483}

2485Node* WasmGraphBuilder::Throw(uint32_t tag_index, const wasm::WasmTag* tag,
                            const base::Vector<Node*> values,
                            wasm::WasmCodePosition position) {
needs_stack_check_ = true;
uint32_t encoded_size = WasmExceptionPackage::GetEncodedSize(tag);

Node* values_array = gasm_->CallRuntimeStub(
    wasm::WasmCode::kWasmAllocateFixedArray, Operator::kNoThrow,
    gasm_->IntPtrConstant(encoded_size));
SetSourcePosition(values_array, position);

uint32_t index = 0;
const wasm::WasmTagSig* sig = tag->sig;
MachineOperatorBuilder* m = mcgraph()->machine();
for (size_t i = 0; i < sig->parameter_count(); ++i) {
  Node* value = values[i];
  switch (sig->GetParam(i).kind()) {
    case wasm::kF32:
      value = gasm_->BitcastFloat32ToInt32(value);
      V8_FALLTHROUGH[[clang::fallthrough]];
    case wasm::kI32:
      BuildEncodeException32BitValue(values_array, &index, value);
      break;
    case wasm::kF64:
      value = gasm_->BitcastFloat64ToInt64(value);
      V8_FALLTHROUGH[[clang::fallthrough]];
    case wasm::kI64: {
      Node* upper32 = gasm_->TruncateInt64ToInt32(
          Binop(wasm::kExprI64ShrU, value, Int64Constant(32)));
      BuildEncodeException32BitValue(values_array, &index, upper32);
      Node* lower32 = gasm_->TruncateInt64ToInt32(value);
      BuildEncodeException32BitValue(values_array, &index, lower32);
      break;
    }
    case wasm::kS128:
      BuildEncodeException32BitValue(
          values_array, &index,
          graph()->NewNode(m->I32x4ExtractLane(0), value));
      BuildEncodeException32BitValue(
          values_array, &index,
          graph()->NewNode(m->I32x4ExtractLane(1), value));
      BuildEncodeException32BitValue(
          values_array, &index,
          graph()->NewNode(m->I32x4ExtractLane(2), value));
      BuildEncodeException32BitValue(
          values_array, &index,
          graph()->NewNode(m->I32x4ExtractLane(3), value));
      break;
    case wasm::kRef:
    case wasm::kOptRef:
    case wasm::kRtt:
      gasm_->StoreFixedArrayElementAny(values_array, index, value);
      ++index;
      break;
    case wasm::kI8:
    case wasm::kI16:
    case wasm::kVoid:
    case wasm::kBottom:
      UNREACHABLE()V8_Fatal("unreachable code");
  }
}
DCHECK_EQ(encoded_size, index)((void) 0);

Node* exception_tag = LoadTagFromTable(tag_index);

Node* throw_call = gasm_->CallRuntimeStub(wasm::WasmCode::kWasmThrow,
                                          Operator::kNoProperties,
                                          exception_tag, values_array);
SetSourcePosition(throw_call, position);
return throw_call;
2555}

2557void WasmGraphBuilder::BuildEncodeException32BitValue(Node* values_array,
                                                    uint32_t* index,
                                                    Node* value) {
Node* upper_halfword_as_smi =
    BuildChangeUint31ToSmi(gasm_->Word32Shr(value, Int32Constant(16)));
gasm_->StoreFixedArrayElementSmi(values_array, *index, upper_halfword_as_smi);
++(*index);
Node* lower_halfword_as_smi =
    BuildChangeUint31ToSmi(gasm_->Word32And(value, Int32Constant(0xFFFFu)));
gasm_->StoreFixedArrayElementSmi(values_array, *index, lower_halfword_as_smi);
++(*index);
2568}

2570Node* WasmGraphBuilder::BuildDecodeException32BitValue(Node* values_array,
                                                     uint32_t* index) {
Node* upper = BuildChangeSmiToInt32(
    gasm_->LoadFixedArrayElementSmi(values_array, *index));
(*index)++;
upper = gasm_->Word32Shl(upper, Int32Constant(16));
Node* lower = BuildChangeSmiToInt32(
    gasm_->LoadFixedArrayElementSmi(values_array, *index));
(*index)++;
Node* value = gasm_->Word32Or(upper, lower);
return value;
2581}

2583Node* WasmGraphBuilder::BuildDecodeException64BitValue(Node* values_array,
                                                     uint32_t* index) {
Node* upper = Binop(wasm::kExprI64Shl,
                    Unop(wasm::kExprI64UConvertI32,
                         BuildDecodeException32BitValue(values_array, index)),
                    Int64Constant(32));
Node* lower = Unop(wasm::kExprI64UConvertI32,
                   BuildDecodeException32BitValue(values_array, index));
return Binop(wasm::kExprI64Ior, upper, lower);
2592}

2594Node* WasmGraphBuilder::Rethrow(Node* except_obj) {
// TODO(v8:8091): Currently the message of the original exception is not being
// preserved when rethrown to the console. The pending message will need to be
// saved when caught and restored here while being rethrown.
return gasm_->CallRuntimeStub(wasm::WasmCode::kWasmRethrow,
                              Operator::kNoProperties, except_obj);
2600}

2602Node* WasmGraphBuilder::ExceptionTagEqual(Node* caught_tag,
                                        Node* expected_tag) {
return gasm_->WordEqual(caught_tag, expected_tag);
2605}

2607Node* WasmGraphBuilder::LoadTagFromTable(uint32_t tag_index) {
Node* tags_table =
    LOAD_INSTANCE_FIELD(TagsTable, MachineType::TaggedPointer());
Node* tag = gasm_->LoadFixedArrayElementPtr(tags_table, tag_index);
return tag;
2612}

2614Node* WasmGraphBuilder::GetExceptionTag(Node* except_obj) {
return gasm_->CallBuiltin(
    Builtin::kWasmGetOwnProperty, Operator::kEliminatable, except_obj,
    LOAD_ROOT(wasm_exception_tag_symbol, wasm_exception_tag_symbol),
    LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer()));
2619}

2621Node* WasmGraphBuilder::GetExceptionValues(Node* except_obj,
                                         const wasm::WasmTag* tag,
                                         base::Vector<Node*> values) {
Node* values_array = gasm_->CallBuiltin(
    Builtin::kWasmGetOwnProperty, Operator::kEliminatable, except_obj,
    LOAD_ROOT(wasm_exception_values_symbol, wasm_exception_values_symbol),
    LOAD_INSTANCE_FIELD(NativeContext, MachineType::TaggedPointer()));
uint32_t index = 0;
const wasm::WasmTagSig* sig = tag->sig;
DCHECK_EQ(sig->parameter_count(), values.size())((void) 0);
for (size_t i = 0; i < sig->parameter_count(); ++i) {
  Node* value;
  switch (sig->GetParam(i).kind()) {
    case wasm::kI32:
      value = BuildDecodeException32BitValue(values_array, &index);
      break;
    case wasm::kI64:
      value = BuildDecodeException64BitValue(values_array, &index);
      break;
    case wasm::kF32: {
      value = Unop(wasm::kExprF32ReinterpretI32,
                   BuildDecodeException32BitValue(values_array, &index));
      break;
    }
    case wasm::kF64: {
      value = Unop(wasm::kExprF64ReinterpretI64,
                   BuildDecodeException64BitValue(values_array, &index));
      break;
    }
    case wasm::kS128:
      value = graph()->NewNode(
          mcgraph()->machine()->I32x4Splat(),
          BuildDecodeException32BitValue(values_array, &index));
      value = graph()->NewNode(
          mcgraph()->machine()->I32x4ReplaceLane(1), value,
          BuildDecodeException32BitValue(values_array, &index));
      value = graph()->NewNode(
          mcgraph()->machine()->I32x4ReplaceLane(2), value,
          BuildDecodeException32BitValue(values_array, &index));
      value = graph()->NewNode(
          mcgraph()->machine()->I32x4ReplaceLane(3), value,
          BuildDecodeException32BitValue(values_array, &index));
      break;
    case wasm::kRef:
    case wasm::kOptRef:
    case wasm::kRtt:
      value = gasm_->LoadFixedArrayElementAny(values_array, index);
      ++index;
      break;
    case wasm::kI8:
    case wasm::kI16:
    case wasm::kVoid:
    case wasm::kBottom:
      UNREACHABLE()V8_Fatal("unreachable code");
  }
  values[i] = value;
}
DCHECK_EQ(index, WasmExceptionPackage::GetEncodedSize(tag))((void) 0);
return values_array;
2680}

2682Node* WasmGraphBuilder::BuildI32DivS(Node* left, Node* right,
                                   wasm::WasmCodePosition position) {
ZeroCheck32(wasm::kTrapDivByZero, right, position);
Node* before = control();
Node* denom_is_m1;
Node* denom_is_not_m1;
BranchExpectFalse(gasm_->Word32Equal(right, Int32Constant(-1)), &denom_is_m1,
                  &denom_is_not_m1);
SetControl(denom_is_m1);
TrapIfEq32(wasm::kTrapDivUnrepresentable, left, kMinInt, position);
if (control() != denom_is_m1) {
  SetControl(Merge(denom_is_not_m1, control()));
} else {
  SetControl(before);
}
return gasm_->Int32Div(left, right);
2698}

2700Node* WasmGraphBuilder::BuildI32RemS(Node* left, Node* right,
                                   wasm::WasmCodePosition position) {
MachineOperatorBuilder* m = mcgraph()->machine();

ZeroCheck32(wasm::kTrapRemByZero, right, position);

Diamond d(graph(), mcgraph()->common(),
          gasm_->Word32Equal(right, Int32Constant(-1)), BranchHint::kFalse);
d.Chain(control());

return d.Phi(MachineRepresentation::kWord32, Int32Constant(0),
             graph()->NewNode(m->Int32Mod(), left, right, d.if_false));
2712}

2714Node* WasmGraphBuilder::BuildI32DivU(Node* left, Node* right,
                                   wasm::WasmCodePosition position) {
ZeroCheck32(wasm::kTrapDivByZero, right, position);
return gasm_->Uint32Div(left, right);
2718}

2720Node* WasmGraphBuilder::BuildI32RemU(Node* left, Node* right,
                                   wasm::WasmCodePosition position) {
ZeroCheck32(wasm::kTrapRemByZero, right, position);
return gasm_->Uint32Mod(left, right);
2724}

2726Node* WasmGraphBuilder::BuildI32AsmjsDivS(Node* left, Node* right) {
MachineOperatorBuilder* m = mcgraph()->machine();

Int32Matcher mr(right);
if (mr.HasResolvedValue()) {
  if (mr.ResolvedValue() == 0) {
    return Int32Constant(0);
  } else if (mr.ResolvedValue() == -1) {
    // The result is the negation of the left input.
    return gasm_->Int32Sub(Int32Constant(0), left);
  }
  return gasm_->Int32Div(left, right);
}

// asm.js semantics return 0 on divide or mod by zero.
if (m->Int32DivIsSafe()) {
  // The hardware instruction does the right thing (e.g. arm).
  return gasm_->Int32Div(left, right);
}

// Check denominator for zero.
Diamond z(graph(), mcgraph()->common(),
          gasm_->Word32Equal(right, Int32Constant(0)), BranchHint::kFalse);
z.Chain(control());

// Check denominator for -1. (avoid minint / -1 case).
Diamond n(graph(), mcgraph()->common(),
          gasm_->Word32Equal(right, Int32Constant(-1)), BranchHint::kFalse);
n.Chain(z.if_false);

Node* div = graph()->NewNode(m->Int32Div(), left, right, n.if_false);

Node* neg = gasm_->Int32Sub(Int32Constant(0), left);

return z.Phi(MachineRepresentation::kWord32, Int32Constant(0),
             n.Phi(MachineRepresentation::kWord32, neg, div));
2762}

2764Node* WasmGraphBuilder::BuildI32AsmjsRemS(Node* left, Node* right) {
CommonOperatorBuilder* c = mcgraph()->common();
MachineOperatorBuilder* m = mcgraph()->machine();
Node* const zero = Int32Constant(0);

Int32Matcher mr(right);
if (mr.HasResolvedValue()) {
  if (mr.ResolvedValue() == 0 || mr.ResolvedValue() == -1) {
    return zero;
  }
  return gasm_->Int32Mod(left, right);
}

// General case for signed integer modulus, with optimization for (unknown)
// power of 2 right hand side.
//
//   if 0 < right then
//     msk = right - 1
//     if right & msk != 0 then
//       left % right
//     else
//       if left < 0 then
//         -(-left & msk)
//       else
//         left & msk
//   else
//     if right < -1 then
//       left % right
//     else
//       zero
//
// Note: We do not use the Diamond helper class here, because it really hurts
// readability with nested diamonds.
Node* const minus_one = Int32Constant(-1);

const Operator* const merge_op = c->Merge(2);
const Operator* const phi_op = c->Phi(MachineRepresentation::kWord32, 2);

Node* check0 = gasm_->Int32LessThan(zero, right);
Node* branch0 =
    graph()->NewNode(c->Branch(BranchHint::kTrue), check0, control());

Node* if_true0 = graph()->NewNode(c->IfTrue(), branch0);
Node* true0;
{
  Node* msk = graph()->NewNode(m->Int32Add(), right, minus_one);

  Node* check1 = graph()->NewNode(m->Word32And(), right, msk);
  Node* branch1 = graph()->NewNode(c->Branch(), check1, if_true0);

  Node* if_true1 = graph()->NewNode(c->IfTrue(), branch1);
  Node* true1 = graph()->NewNode(m->Int32Mod(), left, right, if_true1);

  Node* if_false1 = graph()->NewNode(c->IfFalse(), branch1);
  Node* false1;
  {
    Node* check2 = graph()->NewNode(m->Int32LessThan(), left, zero);
    Node* branch2 =
        graph()->NewNode(c->Branch(BranchHint::kFalse), check2, if_false1);

    Node* if_true2 = graph()->NewNode(c->IfTrue(), branch2);
    Node* true2 = graph()->NewNode(
        m->Int32Sub(), zero,
        graph()->NewNode(m->Word32And(),
                         graph()->NewNode(m->Int32Sub(), zero, left), msk));

    Node* if_false2 = graph()->NewNode(c->IfFalse(), branch2);
    Node* false2 = graph()->NewNode(m->Word32And(), left, msk);

    if_false1 = graph()->NewNode(merge_op, if_true2, if_false2);
    false1 = graph()->NewNode(phi_op, true2, false2, if_false1);
  }

  if_true0 = graph()->NewNode(merge_op, if_true1, if_false1);
  true0 = graph()->NewNode(phi_op, true1, false1, if_true0);
}

Node* if_false0 = graph()->NewNode(c->IfFalse(), branch0);
Node* false0;
{
  Node* check1 = graph()->NewNode(m->Int32LessThan(), right, minus_one);
  Node* branch1 =
      graph()->NewNode(c->Branch(BranchHint::kTrue), check1, if_false0);

  Node* if_true1 = graph()->NewNode(c->IfTrue(), branch1);
  Node* true1 = graph()->NewNode(m->Int32Mod(), left, right, if_true1);

  Node* if_false1 = graph()->NewNode(c->IfFalse(), branch1);
  Node* false1 = zero;

  if_false0 = graph()->NewNode(merge_op, if_true1, if_false1);
  false0 = graph()->NewNode(phi_op, true1, false1, if_false0);
}

Node* merge0 = graph()->NewNode(merge_op, if_true0, if_false0);
return graph()->NewNode(phi_op, true0, false0, merge0);
2860}

2862Node* WasmGraphBuilder::BuildI32AsmjsDivU(Node* left, Node* right) {
MachineOperatorBuilder* m = mcgraph()->machine();
// asm.js semantics return 0 on divide or mod by zero.
if (m->Uint32DivIsSafe()) {
  // The hardware instruction does the right thing (e.g. arm).
  return gasm_->Uint32Div(left, right);
}

// Explicit check for x % 0.
Diamond z(graph(), mcgraph()->common(),
          gasm_->Word32Equal(right, Int32Constant(0)), BranchHint::kFalse);
z.Chain(control());

return z.Phi(MachineRepresentation::kWord32, Int32Constant(0),
             graph()->NewNode(mcgraph()->machine()->Uint32Div(), left, right,
                              z.if_false));
2878}

2880Node* WasmGraphBuilder::BuildI32AsmjsRemU(Node* left, Node* right) {
// asm.js semantics return 0 on divide or mod by zero.
// Explicit check for x % 0.
Diamond z(graph(), mcgraph()->common(),
          gasm_->Word32Equal(right, Int32Constant(0)), BranchHint::kFalse);
z.Chain(control());

Node* rem = graph()->NewNode(mcgraph()->machine()->Uint32Mod(), left, right,
                             z.if_false);
return z.Phi(MachineRepresentation::kWord32, Int32Constant(0), rem);
2890}

2892Node* WasmGraphBuilder::BuildI64DivS(Node* left, Node* right,
                                   wasm::WasmCodePosition position) {
if (mcgraph()->machine()->Is32()) {
  return BuildDiv64Call(left, right, ExternalReference::wasm_int64_div(),
                        MachineType::Int64(), wasm::kTrapDivByZero, position);
}
ZeroCheck64(wasm::kTrapDivByZero, right, position);
Node* before = control();
Node* denom_is_m1;
Node* denom_is_not_m1;
BranchExpectFalse(gasm_->Word64Equal(right, Int64Constant(-1)), &denom_is_m1,
                  &denom_is_not_m1);
SetControl(denom_is_m1);
TrapIfEq64(wasm::kTrapDivUnrepresentable, left,
           std::numeric_limits<int64_t>::min(), position);
if (control() != denom_is_m1) {
  SetControl(Merge(denom_is_not_m1, control()));
} else {
  SetControl(before);
}
return gasm_->Int64Div(left, right);
2913}

2915Node* WasmGraphBuilder::BuildI64RemS(Node* left, Node* right,
                                   wasm::WasmCodePosition position) {
if (mcgraph()->machine()->Is32()) {
  return BuildDiv64Call(left, right, ExternalReference::wasm_int64_mod(),
                        MachineType::Int64(), wasm::kTrapRemByZero, position);
}
ZeroCheck64(wasm::kTrapRemByZero, right, position);
Diamond d(mcgraph()->graph(), mcgraph()->common(),
          gasm_->Word64Equal(right, Int64Constant(-1)));

d.Chain(control());

Node* rem = graph()->NewNode(mcgraph()->machine()->Int64Mod(), left, right,
                             d.if_false);

return d.Phi(MachineRepresentation::kWord64, Int64Constant(0), rem);
2931}

2933Node* WasmGraphBuilder::BuildI64DivU(Node* left, Node* right,
                                   wasm::WasmCodePosition position) {
if (mcgraph()->machine()->Is32()) {
  return BuildDiv64Call(left, right, ExternalReference::wasm_uint64_div(),
                        MachineType::Int64(), wasm::kTrapDivByZero, position);
}
ZeroCheck64(wasm::kTrapDivByZero, right, position);
return gasm_->Uint64Div(left, right);
2941}
2942Node* WasmGraphBuilder::BuildI64RemU(Node* left, Node* right,
                                   wasm::WasmCodePosition position) {
if (mcgraph()->machine()->Is32()) {
  return BuildDiv64Call(left, right, ExternalReference::wasm_uint64_mod(),
                        MachineType::Int64(), wasm::kTrapRemByZero, position);
}
ZeroCheck64(wasm::kTrapRemByZero, right, position);
return gasm_->Uint64Mod(left, right);
2950}

2952Node* WasmGraphBuilder::BuildDiv64Call(Node* left, Node* right,
                                     ExternalReference ref,
                                     MachineType result_type,
                                     wasm::TrapReason trap_zero,
                                     wasm::WasmCodePosition position) {
Node* stack_slot =
    StoreArgsInStackSlot({{MachineRepresentation::kWord64, left},
                          {MachineRepresentation::kWord64, right}});

MachineType sig_types[] = {MachineType::Int32(), MachineType::Pointer()};
MachineSignature sig(1, 1, sig_types);

Node* function = gasm_->ExternalConstant(ref);
Node* call = BuildCCall(&sig, function, stack_slot);

ZeroCheck32(trap_zero, call, position);
TrapIfEq32(wasm::kTrapDivUnrepresentable, call, -1, position);
return gasm_->LoadFromObject(result_type, stack_slot, 0);
2970}

2972Node* WasmGraphBuilder::IsNull(Node* object) {
return gasm_->TaggedEqual(object, RefNull());
2974}

2976template <typename... Args>
2977Node* WasmGraphBuilder::BuildCCall(MachineSignature* sig, Node* function,
                                 Args... args) {
DCHECK_LE(sig->return_count(), 1)((void) 0);
DCHECK_EQ(sizeof...(args), sig->parameter_count())((void) 0);
Node* call_args[] = {function, args..., effect(), control()};

auto call_descriptor =
    Linkage::GetSimplifiedCDescriptor(mcgraph()->zone(), sig);

return gasm_->Call(call_descriptor, arraysize(call_args)(sizeof(ArraySizeHelper(call_args))), call_args);
2987}

2989Node* WasmGraphBuilder::BuildCallNode(const wasm::FunctionSig* sig,
                                    base::Vector<Node*> args,
                                    wasm::WasmCodePosition position,
                                    Node* instance_node, const Operator* op,
                                    Node* frame_state) {
if (instance_node == nullptr) {
  instance_node = GetInstance();
}
needs_stack_check_ = true;
const size_t params = sig->parameter_count();
const size_t has_frame_state = frame_state != nullptr ? 1 : 0;
const size_t extra = 3;  // instance_node, effect, and control.
const size_t count = 1 + params + extra + has_frame_state;

// Reallocate the buffer to make space for extra inputs.
base::SmallVector<Node*, 16 + extra> inputs(count);
DCHECK_EQ(1 + params, args.size())((void) 0);

// Make room for the instance_node parameter at index 1, just after code.
inputs[0] = args[0];  // code
inputs[1] = instance_node;
if (params > 0) memcpy(&inputs[2], &args[1], params * sizeof(Node*));

// Add effect and control inputs.
if (has_frame_state != 0) inputs[params + 2] = frame_state;
inputs[params + has_frame_state + 2] = effect();
inputs[params + has_frame_state + 3] = control();

Node* call = graph()->NewNode(op, static_cast<int>(count), inputs.begin());
// Return calls have no effect output. Other calls are the new effect node.
if (op->EffectOutputCount() > 0) SetEffect(call);
DCHECK(position == wasm::kNoCodePosition || position > 0)((void) 0);
if (position > 0) SetSourcePosition(call, position);

return call;
3024}

3026Node* WasmGraphBuilder::BuildWasmCall(const wasm::FunctionSig* sig,
                                    base::Vector<Node*> args,
                                    base::Vector<Node*> rets,
                                    wasm::WasmCodePosition position,
                                    Node* instance_node, Node* frame_state) {
CallDescriptor* call_descriptor = GetWasmCallDescriptor(
    mcgraph()->zone(), sig, kWasmFunction, frame_state != nullptr);
const Operator* op = mcgraph()->common()->Call(call_descriptor);
Node* call =
    BuildCallNode(sig, args, position, instance_node, op, frame_state);
// TODO(manoskouk): If we have kNoThrow calls, do not set them as control.
DCHECK_GT(call->op()->ControlOutputCount(), 0)((void) 0);
SetControl(call);

size_t ret_count = sig->return_count();
if (ret_count == 0) return call;  // No return value.

DCHECK_EQ(ret_count, rets.size())((void) 0);
if (ret_count == 1) {
  // Only a single return value.
  rets[0] = call;
} else {
  // Create projections for all return values.
  for (size_t i = 0; i < ret_count; i++) {
    rets[i] = graph()->NewNode(mcgraph()->common()->Projection(i), call,
                               graph()->start());
  }
}
return call;
3055}

3057Node* WasmGraphBuilder::BuildWasmReturnCall(const wasm::FunctionSig* sig,
                                          base::Vector<Node*> args,
                                          wasm::WasmCodePosition position,
                                          Node* instance_node) {
CallDescriptor* call_descriptor =
    GetWasmCallDescriptor(mcgraph()->zone(), sig);
const Operator* op = mcgraph()->common()->TailCall(call_descriptor);
Node* call = BuildCallNode(sig, args, position, instance_node, op);

// TODO(manoskouk): If we have kNoThrow calls, do not merge them to end.
DCHECK_GT(call->op()->ControlOutputCount(), 0)((void) 0);
gasm_->MergeControlToEnd(call);

return call;
3071}

3073Node* WasmGraphBuilder::BuildImportCall(const wasm::FunctionSig* sig,
                                      base::Vector<Node*> args,
                                      base::Vector<Node*> rets,
                                      wasm::WasmCodePosition position,
                                      int func_index,
                                      IsReturnCall continuation) {
return BuildImportCall(sig, args, rets, position,
                       gasm_->Uint32Constant(func_index), continuation);
3081}

3083Node* WasmGraphBuilder::BuildImportCall(const wasm::FunctionSig* sig,
                                      base::Vector<Node*> args,
                                      base::Vector<Node*> rets,
                                      wasm::WasmCodePosition position,
                                      Node* func_index,
                                      IsReturnCall continuation) {
// Load the imported function refs array from the instance.
Node* imported_function_refs =
    LOAD_INSTANCE_FIELD(ImportedFunctionRefs, MachineType::TaggedPointer());
// Access fixed array at {header_size - tag + func_index * kTaggedSize}.
Node* func_index_intptr = BuildChangeUint32ToUintPtr(func_index);
Node* ref_node = gasm_->LoadFixedArrayElement(
    imported_function_refs, func_index_intptr, MachineType::TaggedPointer());

// Load the target from the imported_targets array at the offset of
// {func_index}.
Node* func_index_times_pointersize = gasm_->IntMul(
    func_index_intptr, gasm_->IntPtrConstant(kSystemPointerSize));
Node* imported_targets =
    LOAD_INSTANCE_FIELD(ImportedFunctionTargets, MachineType::Pointer());
Node* target_node = gasm_->LoadImmutableFromObject(
    MachineType::Pointer(), imported_targets, func_index_times_pointersize);
args[0] = target_node;

switch (continuation) {
  case kCallContinues:
    return BuildWasmCall(sig, args, rets, position, ref_node);
  case kReturnCall:
    DCHECK(rets.empty())((void) 0);
    return BuildWasmReturnCall(sig, args, position, ref_node);
}
3114}

3116Node* WasmGraphBuilder::CallDirect(uint32_t index, wasm::FunctionSig* real_sig,
                                 base::Vector<Node*> args,
                                 base::Vector<Node*> rets,
                                 wasm::WasmCodePosition position) {
DCHECK_NULL(args[0])((void) 0);

if (env_ && index < env_->module->num_imported_functions) {
  // Call to an imported function.
  return BuildImportCall(real_sig, args, rets, position, index,
                         kCallContinues);
}

// A direct call to a wasm function defined in this module.
// Just encode the function index. This will be patched at instantiation.
Address code = static_cast<Address>(index);
args[0] = mcgraph()->RelocatableIntPtrConstant(code, RelocInfo::WASM_CALL);

return BuildWasmCall(real_sig, args, rets, position, nullptr);
3134}

3136Node* WasmGraphBuilder::CallIndirect(uint32_t table_index, uint32_t sig_index,
                                   wasm::FunctionSig* sig,
                                   base::Vector<Node*> args,
                                   base::Vector<Node*> rets,
                                   wasm::WasmCodePosition position) {
return BuildIndirectCall(table_index, sig_index, sig, args, rets, position,
                         kCallContinues);
3143}

3145void WasmGraphBuilder::LoadIndirectFunctionTable(uint32_t table_index,
                                               Node** ift_size,
                                               Node** ift_sig_ids,
                                               Node** ift_targets,
                                               Node** ift_instances) {
bool needs_dynamic_size = true;
const wasm::WasmTable& table = env_->module->tables[table_index];
if (table.has_maximum_size && table.maximum_size == table.initial_size) {
  *ift_size = Int32Constant(table.initial_size);
  needs_dynamic_size = false;
}

if (table_index == 0) {
  if (needs_dynamic_size) {
    *ift_size = LOAD_MUTABLE_INSTANCE_FIELD(IndirectFunctionTableSize,
                                            MachineType::Uint32());
  }
  *ift_sig_ids = LOAD_MUTABLE_INSTANCE_FIELD(IndirectFunctionTableSigIds,
                                             MachineType::Pointer());
  *ift_targets = LOAD_MUTABLE_INSTANCE_FIELD(IndirectFunctionTableTargets,
                                             MachineType::Pointer());
  *ift_instances = LOAD_MUTABLE_INSTANCE_FIELD(IndirectFunctionTableRefs,
                                               MachineType::TaggedPointer());
  return;
}

Node* ift_tables = LOAD_MUTABLE_INSTANCE_FIELD(IndirectFunctionTables,
                                               MachineType::TaggedPointer());
Node* ift_table = gasm_->LoadFixedArrayElementAny(ift_tables, table_index);

if (needs_dynamic_size) {
  *ift_size = gasm_->LoadFromObject(
      MachineType::Int32(), ift_table,
      wasm::ObjectAccess::ToTagged(WasmIndirectFunctionTable::kSizeOffset));
}

*ift_sig_ids = gasm_->LoadFromObject(
    MachineType::Pointer(), ift_table,
    wasm::ObjectAccess::ToTagged(WasmIndirectFunctionTable::kSigIdsOffset));

*ift_targets = gasm_->LoadFromObject(
    MachineType::Pointer(), ift_table,
    wasm::ObjectAccess::ToTagged(WasmIndirectFunctionTable::kTargetsOffset));

*ift_instances = gasm_->LoadFromObject(
    MachineType::TaggedPointer(), ift_table,
    wasm::ObjectAccess::ToTagged(WasmIndirectFunctionTable::kRefsOffset));
3192}

3194Node* WasmGraphBuilder::BuildIndirectCall(
  uint32_t table_index, uint32_t sig_index, wasm::FunctionSig* real_sig,
  base::Vector<Node*> args, base::Vector<Node*> rets,
  wasm::WasmCodePosition position, IsReturnCall continuation) {
DCHECK_NOT_NULL(args[0])((void) 0);
DCHECK_NOT_NULL(env_)((void) 0);

// First we have to load the table.
Node* ift_size;
Node* ift_sig_ids;
Node* ift_targets;
Node* ift_instances;
LoadIndirectFunctionTable(table_index, &ift_size, &ift_sig_ids, &ift_targets,
                          &ift_instances);

Node* key = args[0];

// Bounds check against the table size.
Node* in_bounds = gasm_->Uint32LessThan(key, ift_size);
TrapIfFalse(wasm::kTrapTableOutOfBounds, in_bounds, position);

const wasm::ValueType table_type = env_->module->tables[table_index].type;
// Check that the table entry is not null and that the type of the function is
// **identical with** the function type declared at the call site (no
// subtyping of functions is allowed).
// Note: Since null entries are identified by having ift_sig_id (-1), we only
// need one comparison.
// TODO(9495): Change this if we should do full function subtyping instead.
const bool needs_signature_check =
    FLAG_experimental_wasm_gc ||
    table_type.is_reference_to(wasm::HeapType::kFunc) ||
    table_type.is_nullable();
if (needs_signature_check) {
  Node* int32_scaled_key =
      BuildChangeUint32ToUintPtr(gasm_->Word32Shl(key, Int32Constant(2)));

  Node* loaded_sig = gasm_->LoadFromObject(MachineType::Int32(), ift_sig_ids,
                                           int32_scaled_key);
  int32_t expected_sig_id = env_->module->canonicalized_type_ids[sig_index];
  Node* sig_match =
      gasm_->Word32Equal(loaded_sig, Int32Constant(expected_sig_id));
  TrapIfFalse(wasm::kTrapFuncSigMismatch, sig_match, position);
}

Node* key_intptr = BuildChangeUint32ToUintPtr(key);

Node* target_instance = gasm_->LoadFixedArrayElement(
    ift_instances, key_intptr, MachineType::TaggedPointer());

Node* intptr_scaled_key =
    gasm_->IntMul(key_intptr, gasm_->IntPtrConstant(kSystemPointerSize));

Node* target = gasm_->LoadFromObject(MachineType::Pointer(), ift_targets,
                                     intptr_scaled_key);

args[0] = target;

switch (continuation) {
  case kCallContinues:
    return BuildWasmCall(real_sig, args, rets, position, target_instance);
  case kReturnCall:
    return BuildWasmReturnCall(real_sig, args, position, target_instance);
}
3257}

3259Node* WasmGraphBuilder::BuildLoadExternalPointerFromObject(
  Node* object, int offset, ExternalPointerTag tag) {
3261#ifdef V8_SANDBOXED_EXTERNAL_POINTERS
Node* external_pointer = gasm_->LoadFromObject(
    MachineType::Uint32(), object, wasm::ObjectAccess::ToTagged(offset));
STATIC_ASSERT(kExternalPointerIndexShift > kSystemPointerSizeLog2)static_assert(kExternalPointerIndexShift > kSystemPointerSizeLog2
, "kExternalPointerIndexShift > kSystemPointerSizeLog2");
Node* shift_amount =
    gasm_->Int32Constant(kExternalPointerIndexShift - kSystemPointerSizeLog2);
Node* scaled_index = gasm_->Word32Shr(external_pointer, shift_amount);
Node* isolate_root = BuildLoadIsolateRoot();
Node* table =
    gasm_->LoadFromObject(MachineType::Pointer(), isolate_root,
                          IsolateData::external_pointer_table_offset() +
                              Internals::kExternalPointerTableBufferOffset);
Node* decoded_ptr = gasm_->Load(MachineType::Pointer(), table, scaled_index);
return gasm_->WordAnd(decoded_ptr, gasm_->IntPtrConstant(~tag));
3275#else
return gasm_->LoadFromObject(MachineType::Pointer(), object,
                             wasm::ObjectAccess::ToTagged(offset));
3278#endif
3279}

3281Node* WasmGraphBuilder::BuildLoadCallTargetFromExportedFunctionData(
  Node* function) {
Node* internal = gasm_->LoadFromObject(
    MachineType::TaggedPointer(), function,
    wasm::ObjectAccess::ToTagged(WasmExportedFunctionData::kInternalOffset));
return BuildLoadExternalPointerFromObject(
    internal, WasmInternalFunction::kForeignAddressOffset);
3288}

3290// TODO(9495): Support CAPI function refs.
3291Node* WasmGraphBuilder::BuildCallRef(const wasm::FunctionSig* real_sig,
                                   base::Vector<Node*> args,
                                   base::Vector<Node*> rets,
                                   CheckForNull null_check,
                                   IsReturnCall continuation,
                                   wasm::WasmCodePosition position) {
if (null_check == kWithNullCheck) {
  TrapIfTrue(wasm::kTrapNullDereference, IsNull(args[0]), position);
}

Node* function = args[0];

auto load_target = gasm_->MakeLabel();
auto end_label = gasm_->MakeLabel(MachineType::PointerRepresentation());

Node* ref_node = gasm_->LoadImmutableFromObject(
    MachineType::TaggedPointer(), function,
    wasm::ObjectAccess::ToTagged(WasmInternalFunction::kRefOffset));

Node* target = BuildLoadExternalPointerFromObject(
    function, WasmInternalFunction::kForeignAddressOffset);
Node* is_null_target = gasm_->WordEqual(target, gasm_->IntPtrConstant(0));
gasm_->GotoIfNot(is_null_target, &end_label, target);
{
  // Compute the call target from the (on-heap) wrapper code. The cached
  // target can only be null for WasmJSFunctions.
  Node* wrapper_code = gasm_->LoadImmutableFromObject(
      MachineType::TaggedPointer(), function,
      wasm::ObjectAccess::ToTagged(WasmInternalFunction::kCodeOffset));
  Node* call_target;
  if (V8_EXTERNAL_CODE_SPACE_BOOLfalse) {
    call_target = BuildLoadExternalPointerFromObject(
        wrapper_code, CodeDataContainer::kCodeEntryPointOffset,
        kCodeEntryPointTag);

  } else {
    call_target = gasm_->IntAdd(
        wrapper_code, gasm_->IntPtrConstant(
                          wasm::ObjectAccess::ToTagged(Code::kHeaderSize)));
  }
  gasm_->Goto(&end_label, call_target);
}

gasm_->Bind(&end_label);

args[0] = end_label.PhiAt(0);

Node* call = continuation == kCallContinues
                 ? BuildWasmCall(real_sig, args, rets, position, ref_node)
                 : BuildWasmReturnCall(real_sig, args, position, ref_node);
return call;
3342}

3344void WasmGraphBuilder::CompareToInternalFunctionAtIndex(
  Node* func_ref, uint32_t function_index, Node** success_control,
  Node** failure_control) {
// Since we are comparing to a function reference, it is guaranteed that
// instance->wasm_internal_functions() has been initialized.
Node* internal_functions = gasm_->LoadImmutable(
    MachineType::TaggedPointer(), GetInstance(),
    wasm::ObjectAccess::ToTagged(
        WasmInstanceObject::kWasmInternalFunctionsOffset));
Node* function_ref_at_index = gasm_->LoadFixedArrayElement(
    internal_functions, gasm_->IntPtrConstant(function_index),
    MachineType::AnyTagged());
gasm_->Branch(gasm_->TaggedEqual(function_ref_at_index, func_ref),
              success_control, failure_control, BranchHint::kTrue);
3358}

3360Node* WasmGraphBuilder::CallRef(const wasm::FunctionSig* real_sig,
                              base::Vector<Node*> args,
                              base::Vector<Node*> rets,
                              WasmGraphBuilder::CheckForNull null_check,
                              wasm::WasmCodePosition position) {
return BuildCallRef(real_sig, args, rets, null_check,
                    IsReturnCall::kCallContinues, position);
3367}

3369Node* WasmGraphBuilder::ReturnCallRef(const wasm::FunctionSig* real_sig,
                                    base::Vector<Node*> args,
                                    WasmGraphBuilder::CheckForNull null_check,
                                    wasm::WasmCodePosition position) {
return BuildCallRef(real_sig, args, {}, null_check, IsReturnCall::kReturnCall,
                    position);
3375}

3377Node* WasmGraphBuilder::ReturnCall(uint32_t index,
                                 const wasm::FunctionSig* real_sig,
                                 base::Vector<Node*> args,
                                 wasm::WasmCodePosition position) {
DCHECK_NULL(args[0])((void) 0);

if (env_ && index < env_->module->num_imported_functions) {
  // Return Call to an imported function.
  return BuildImportCall(real_sig, args, {}, position, index, kReturnCall);
}

// A direct tail call to a wasm function defined in this module.
// Just encode the function index. This will be patched during code
// generation.
Address code = static_cast<Address>(index);
args[0] = mcgraph()->RelocatableIntPtrConstant(code, RelocInfo::WASM_CALL);

return BuildWasmReturnCall(real_sig, args, position, nullptr);
3395}

3397Node* WasmGraphBuilder::ReturnCallIndirect(uint32_t table_index,
                                         uint32_t sig_index,
                                         wasm::FunctionSig* real_sig,
                                         base::Vector<Node*> args,
                                         wasm::WasmCodePosition position) {
return BuildIndirectCall(table_index, sig_index, real_sig, args, {}, position,
                         kReturnCall);
3404}

3406void WasmGraphBuilder::BrOnNull(Node* ref_object, Node** null_node,
                              Node** non_null_node) {
BranchExpectFalse(IsNull(ref_object), null_node, non_null_node);
3409}

3411Node* WasmGraphBuilder::BuildI32Rol(Node* left, Node* right) {
// Implement Rol by Ror since TurboFan does not have Rol opcode.
// TODO(weiliang): support Word32Rol opcode in TurboFan.
Int32Matcher m(right);
if (m.HasResolvedValue()) {
  return Binop(wasm::kExprI32Ror, left,
               Int32Constant(32 - (m.ResolvedValue() & 0x1F)));
} else {
  return Binop(wasm::kExprI32Ror, left,
               Binop(wasm::kExprI32Sub, Int32Constant(32), right));
}
3422}

3424Node* WasmGraphBuilder::BuildI64Rol(Node* left, Node* right) {
// Implement Rol by Ror since TurboFan does not have Rol opcode.
// TODO(weiliang): support Word64Rol opcode in TurboFan.
Int64Matcher m(right);
Node* inv_right = m.HasResolvedValue()
                      ? Int64Constant(64 - (m.ResolvedValue() & 0x3F))
                      : Binop(wasm::kExprI64Sub, Int64Constant(64), right);
return Binop(wasm::kExprI64Ror, left, inv_right);
3432}

3434Node* WasmGraphBuilder::Invert(Node* node) {
return Unop(wasm::kExprI32Eqz, node);
3436}

3438Node* WasmGraphBuilder::BuildTruncateIntPtrToInt32(Node* value) {
return mcgraph()->machine()->Is64() ? gasm_->TruncateInt64ToInt32(value)
                                    : value;
3441}

3443Node* WasmGraphBuilder::BuildChangeInt32ToIntPtr(Node* value) {
return mcgraph()->machine()->Is64() ? gasm_->ChangeInt32ToInt64(value)
                                    : value;
3446}

3448Node* WasmGraphBuilder::BuildChangeIntPtrToInt64(Node* value) {
return mcgraph()->machine()->Is32() ? gasm_->ChangeInt32ToInt64(value)
                                    : value;
3451}

3453Node* WasmGraphBuilder::BuildChangeUint32ToUintPtr(Node* node) {
if (mcgraph()->machine()->Is32()) return node;
// Fold instances of ChangeUint32ToUint64(IntConstant) directly.
Uint32Matcher matcher(node);
if (matcher.HasResolvedValue()) {
  uintptr_t value = matcher.ResolvedValue();
  return mcgraph()->IntPtrConstant(bit_cast<intptr_t>(value));
}
return gasm_->ChangeUint32ToUint64(node);
3462}

3464Node* WasmGraphBuilder::BuildSmiShiftBitsConstant() {
return gasm_->IntPtrConstant(kSmiShiftSize + kSmiTagSize);
3466}

3468Node* WasmGraphBuilder::BuildSmiShiftBitsConstant32() {
return Int32Constant(kSmiShiftSize + kSmiTagSize);
3470}

3472Node* WasmGraphBuilder::BuildChangeInt32ToSmi(Node* value) {
// With pointer compression, only the lower 32 bits are used.
return COMPRESS_POINTERS_BOOLfalse
           ? gasm_->Word32Shl(value, BuildSmiShiftBitsConstant32())
           : gasm_->WordShl(BuildChangeInt32ToIntPtr(value),
                            BuildSmiShiftBitsConstant());
3478}

3480Node* WasmGraphBuilder::BuildChangeUint31ToSmi(Node* value) {
return COMPRESS_POINTERS_BOOLfalse
           ? gasm_->Word32Shl(value, BuildSmiShiftBitsConstant32())
           : gasm_->WordShl(BuildChangeUint32ToUintPtr(value),
                            BuildSmiShiftBitsConstant());
3485}

3487Node* WasmGraphBuilder::BuildChangeSmiToInt32(Node* value) {
return COMPRESS_POINTERS_BOOLfalse
           ? gasm_->Word32Sar(value, BuildSmiShiftBitsConstant32())
           : BuildTruncateIntPtrToInt32(
                 gasm_->WordSar(value, BuildSmiShiftBitsConstant()));
3492}

3494Node* WasmGraphBuilder::BuildChangeSmiToIntPtr(Node* value) {
return COMPRESS_POINTERS_BOOLfalse
           ? BuildChangeInt32ToIntPtr(
                 gasm_->Word32Sar(value, BuildSmiShiftBitsConstant32()))
           : gasm_->WordSar(value, BuildSmiShiftBitsConstant());
3499}

3501Node* WasmGraphBuilder::BuildConvertUint32ToSmiWithSaturation(Node* value,
                                                            uint32_t maxval) {
DCHECK(Smi::IsValid(maxval))((void) 0);
Node* max = mcgraph()->Uint32Constant(maxval);
Node* check = gasm_->Uint32LessThanOrEqual(value, max);
Node* valsmi = BuildChangeUint31ToSmi(value);
Node* maxsmi = gasm_->NumberConstant(maxval);
Diamond d(graph(), mcgraph()->common(), check, BranchHint::kTrue);
d.Chain(control());
return d.Phi(MachineRepresentation::kTagged, valsmi, maxsmi);
3511}

3513void WasmGraphBuilder::InitInstanceCache(
  WasmInstanceCacheNodes* instance_cache) {
// We handle caching of the instance cache nodes manually, and we may reload
// them in contexts where load elimination would eliminate the reload.
// Therefore, we use plain Load nodes which are not subject to load
// elimination.

// Load the memory start.
3521#ifdef V8_SANDBOXED_POINTERS
instance_cache->mem_start = LOAD_INSTANCE_FIELD_NO_ELIMINATION(gasm_->Load( assert_size(WASM_INSTANCE_OBJECT_SIZE(MemoryStart
), MachineType::SandboxedPointer()), GetInstance(), wasm::ObjectAccess
::ToTagged(WasmInstanceObject::kMemoryStartOffset))
    MemoryStart, MachineType::SandboxedPointer())gasm_->Load( assert_size(WASM_INSTANCE_OBJECT_SIZE(MemoryStart
), MachineType::SandboxedPointer()), GetInstance(), wasm::ObjectAccess
::ToTagged(WasmInstanceObject::kMemoryStartOffset));
3524#else
instance_cache->mem_start =
    LOAD_INSTANCE_FIELD_NO_ELIMINATION(MemoryStart, MachineType::UintPtr())gasm_->Load( assert_size(WASM_INSTANCE_OBJECT_SIZE(MemoryStart
), MachineType::UintPtr()), GetInstance(), wasm::ObjectAccess
::ToTagged(WasmInstanceObject::kMemoryStartOffset));
3527#endif

// Load the memory size.
instance_cache->mem_size =
    LOAD_INSTANCE_FIELD_NO_ELIMINATION(MemorySize, MachineType::UintPtr())gasm_->Load( assert_size(WASM_INSTANCE_OBJECT_SIZE(MemorySize
), MachineType::UintPtr()), GetInstance(), wasm::ObjectAccess
::ToTagged(WasmInstanceObject::kMemorySizeOffset));
3532}

3534void WasmGraphBuilder::PrepareInstanceCacheForLoop(
  WasmInstanceCacheNodes* instance_cache, Node* control) {
3536#define INTRODUCE_PHI(field, rep)                                            \
instance_cache->field = graph()->NewNode(mcgraph()->common()->Phi(rep, 1), \
                                         instance_cache->field, control);

INTRODUCE_PHI(mem_start, MachineType::PointerRepresentation());
INTRODUCE_PHI(mem_size, MachineType::PointerRepresentation());
3542#undef INTRODUCE_PHI
3543}

3545void WasmGraphBuilder::NewInstanceCacheMerge(WasmInstanceCacheNodes* to,
                                           WasmInstanceCacheNodes* from,
                                           Node* merge) {
3548#define INTRODUCE_PHI(field, rep)                                            \
if (to->field != from->field) {                                            \
  Node* vals[] = {to->field, from->field, merge};                          \
  to->field = graph()->NewNode(mcgraph()->common()->Phi(rep, 2), 3, vals); \
}

INTRODUCE_PHI(mem_start, MachineType::PointerRepresentation());
INTRODUCE_PHI(mem_size, MachineRepresentation::kWord32);
3556#undef INTRODUCE_PHI
3557}

3559void WasmGraphBuilder::MergeInstanceCacheInto(WasmInstanceCacheNodes* to,
                                            WasmInstanceCacheNodes* from,
                                            Node* merge) {
to->mem_size = CreateOrMergeIntoPhi(MachineType::PointerRepresentation(),
                                    merge, to->mem_size, from->mem_size);
to->mem_start = CreateOrMergeIntoPhi(MachineType::PointerRepresentation(),
                                     merge, to->mem_start, from->mem_start);
3566}

3568Node* WasmGraphBuilder::CreateOrMergeIntoPhi(MachineRepresentation rep,
                                           Node* merge, Node* tnode,
                                           Node* fnode) {
if (IsPhiWithMerge(tnode, merge)) {
  AppendToPhi(tnode, fnode);
} else if (tnode != fnode) {
  // Note that it is not safe to use {Buffer} here since this method is used
  // via {CheckForException} while the {Buffer} is in use by another method.
  uint32_t count = merge->InputCount();
  // + 1 for the merge node.
  base::SmallVector<Node*, 9> inputs(count + 1);
  for (uint32_t j = 0; j < count - 1; j++) inputs[j] = tnode;
  inputs[count - 1] = fnode;
  inputs[count] = merge;
  tnode = graph()->NewNode(mcgraph()->common()->Phi(rep, count), count + 1,
                           inputs.begin());
}
return tnode;
3586}

3588Node* WasmGraphBuilder::CreateOrMergeIntoEffectPhi(Node* merge, Node* tnode,
                                                 Node* fnode) {
if (IsPhiWithMerge(tnode, merge)) {
  AppendToPhi(tnode, fnode);
} else if (tnode != fnode) {
  // Note that it is not safe to use {Buffer} here since this method is used
  // via {CheckForException} while the {Buffer} is in use by another method.
  uint32_t count = merge->InputCount();
  // + 1 for the merge node.
  base::SmallVector<Node*, 9> inputs(count + 1);
  for (uint32_t j = 0; j < count - 1; j++) {
    inputs[j] = tnode;
  }
  inputs[count - 1] = fnode;
  inputs[count] = merge;
  tnode = graph()->NewNode(mcgraph()->common()->EffectPhi(count), count + 1,
                           inputs.begin());
}
return tnode;
3607}

3609Node* WasmGraphBuilder::effect() { return gasm_->effect(); }

3611Node* WasmGraphBuilder::control() { return gasm_->control(); }

3613Node* WasmGraphBuilder::SetEffect(Node* node) {
SetEffectControl(node, control());
return node;
3616}

3618Node* WasmGraphBuilder::SetControl(Node* node) {
SetEffectControl(effect(), node);
return node;
3621}

3623void WasmGraphBuilder::SetEffectControl(Node* effect, Node* control) {
gasm_->InitializeEffectControl(effect, control);
3625}

3627Node* WasmGraphBuilder::MemBuffer(uintptr_t offset) {
DCHECK_NOT_NULL(instance_cache_)((void) 0);
Node* mem_start = instance_cache_->mem_start;
DCHECK_NOT_NULL(mem_start)((void) 0);
if (offset == 0) return mem_start;
return gasm_->IntAdd(mem_start, gasm_->UintPtrConstant(offset));
3633}

3635Node* WasmGraphBuilder::CurrentMemoryPages() {
// CurrentMemoryPages can not be called from asm.js.
DCHECK_EQ(wasm::kWasmOrigin, env_->module->origin)((void) 0);
DCHECK_NOT_NULL(instance_cache_)((void) 0);
Node* mem_size = instance_cache_->mem_size;
DCHECK_NOT_NULL(mem_size)((void) 0);
Node* result =
    gasm_->WordShr(mem_size, Int32Constant(wasm::kWasmPageSizeLog2));
result = env_->module->is_memory64 ? BuildChangeIntPtrToInt64(result)
                                   : BuildTruncateIntPtrToInt32(result);
return result;
3646}

3648// Only call this function for code which is not reused across instantiations,
3649// as we do not patch the embedded js_context.
3650Node* WasmGraphBuilder::BuildCallToRuntimeWithContext(Runtime::FunctionId f,
                                                    Node* js_context,
                                                    Node** parameters,
                                                    int parameter_count) {
const Runtime::Function* fun = Runtime::FunctionForId(f);
auto call_descriptor = Linkage::GetRuntimeCallDescriptor(
    mcgraph()->zone(), f, fun->nargs, Operator::kNoProperties,
    CallDescriptor::kNoFlags);
// The CEntryStub is loaded from the IsolateRoot so that generated code is
// Isolate independent. At the moment this is only done for CEntryStub(1).
Node* isolate_root = BuildLoadIsolateRoot();
DCHECK_EQ(1, fun->result_size)((void) 0);
auto centry_id =
    Builtin::kCEntry_Return1_DontSaveFPRegs_ArgvOnStack_NoBuiltinExit;
int builtin_slot_offset = IsolateData::BuiltinSlotOffset(centry_id);
Node* centry_stub = gasm_->LoadFromObject(MachineType::Pointer(),
                                          isolate_root, builtin_slot_offset);
// TODO(titzer): allow arbitrary number of runtime arguments
// At the moment we only allow 5 parameters. If more parameters are needed,
// increase this constant accordingly.
static const int kMaxParams = 5;
DCHECK_GE(kMaxParams, parameter_count)((void) 0);
Node* inputs[kMaxParams + 6];
int count = 0;
inputs[count++] = centry_stub;
for (int i = 0; i < parameter_count; i++) {
  inputs[count++] = parameters[i];
}
inputs[count++] =
    mcgraph()->ExternalConstant(ExternalReference::Create(f));  // ref
inputs[count++] = Int32Constant(fun->nargs);                    // arity
inputs[count++] = js_context;                                   // js_context
inputs[count++] = effect();
inputs[count++] = control();

return gasm_->Call(call_descriptor, count, inputs);
3686}

3688Node* WasmGraphBuilder::BuildCallToRuntime(Runtime::FunctionId f,
                                         Node** parameters,
                                         int parameter_count) {
return BuildCallToRuntimeWithContext(f, NoContextConstant(), parameters,
                                     parameter_count);
3693}

3695void WasmGraphBuilder::GetGlobalBaseAndOffset(const wasm::WasmGlobal& global,
                                            Node** base, Node** offset) {
if (global.mutability && global.imported) {
  Node* base_or_index = gasm_->LoadFromObject(
      MachineType::UintPtr(),
      LOAD_INSTANCE_FIELD(ImportedMutableGlobals, MachineType::UintPtr()),
      Int32Constant(global.index * kSystemPointerSize));
  if (global.type.is_reference()) {
    // Load the base from the ImportedMutableGlobalsBuffer of the instance.
    Node* buffers = LOAD_INSTANCE_FIELD(ImportedMutableGlobalsBuffers,
                                        MachineType::TaggedPointer());
    *base = gasm_->LoadFixedArrayElementAny(buffers, global.index);

    // For this case, {base_or_index} gives the index of the global in the
    // buffer. From the index, calculate the actual offset in the FixedArray.
    // This is kHeaderSize + (index * kTaggedSize).
    *offset = gasm_->IntAdd(
        gasm_->IntMul(base_or_index, gasm_->IntPtrConstant(kTaggedSize)),
        gasm_->IntPtrConstant(
            wasm::ObjectAccess::ToTagged(FixedArray::kObjectsOffset)));
  } else {
    *base = base_or_index;
    *offset = gasm_->IntPtrConstant(0);
  }
} else if (global.type.is_reference()) {
  *base =
      LOAD_INSTANCE_FIELD(TaggedGlobalsBuffer, MachineType::TaggedPointer());
  *offset = gasm_->IntPtrConstant(
      wasm::ObjectAccess::ElementOffsetInTaggedFixedArray(global.offset));
} else {
  *base = LOAD_INSTANCE_FIELD(GlobalsStart, MachineType::UintPtr());
  *offset = gasm_->IntPtrConstant(global.offset);
}
3728}

3730Node* WasmGraphBuilder::GlobalGet(uint32_t index) {
const wasm::WasmGlobal& global = env_->module->globals[index];
if (global.type == wasm::kWasmS128) has_simd_ = true;
Node* base = nullptr;
Node* offset = nullptr;
GetGlobalBaseAndOffset(global, &base, &offset);
MachineType mem_type = global.type.machine_type();
return global.mutability ? gasm_->LoadFromObject(mem_type, base, offset)
                         : gasm_->LoadImmutable(mem_type, base, offset);
3739}

3741void WasmGraphBuilder::GlobalSet(uint32_t index, Node* val) {
const wasm::WasmGlobal& global = env_->module->globals[index];
if (global.type == wasm::kWasmS128) has_simd_ = true;
Node* base = nullptr;
Node* offset = nullptr;
GetGlobalBaseAndOffset(global, &base, &offset);
ObjectAccess access(global.type.machine_type(), global.type.is_reference()
                                                    ? kFullWriteBarrier
                                                    : kNoWriteBarrier);
gasm_->StoreToObject(access, base, offset, val);
3751}

3753Node* WasmGraphBuilder::TableGet(uint32_t table_index, Node* index,
                               wasm::WasmCodePosition position) {
return gasm_->CallRuntimeStub(wasm::WasmCode::kWasmTableGet,
                              Operator::kNoThrow,
                              gasm_->IntPtrConstant(table_index), index);
3758}

3760void WasmGraphBuilder::TableSet(uint32_t table_index, Node* index, Node* val,
                              wasm::WasmCodePosition position) {
gasm_->CallRuntimeStub(wasm::WasmCode::kWasmTableSet, Operator::kNoThrow,
                       gasm_->IntPtrConstant(table_index), index, val);
3764}

3766Node* WasmGraphBuilder::CheckBoundsAndAlignment(
  int8_t access_size, Node* index, uint64_t offset,
  wasm::WasmCodePosition position) {
// Atomic operations need bounds checks until the backend can emit protected
// loads.
index =
    BoundsCheckMem(access_size, index, offset, position, kNeedsBoundsCheck)
        .first;

const uintptr_t align_mask = access_size - 1;

// {offset} is validated to be within uintptr_t range in {BoundsCheckMem}.
uintptr_t capped_offset = static_cast<uintptr_t>(offset);
// Don't emit an alignment check if the index is a constant.
// TODO(wasm): a constant match is also done above in {BoundsCheckMem}.
UintPtrMatcher match(index);
if (match.HasResolvedValue()) {
  uintptr_t effective_offset = match.ResolvedValue() + capped_offset;
  if ((effective_offset & align_mask) != 0) {
    // statically known to be unaligned; trap.
    TrapIfEq32(wasm::kTrapUnalignedAccess, Int32Constant(0), 0, position);
  }
  return index;
}

// Unlike regular memory accesses, atomic memory accesses should trap if
// the effective offset is misaligned.
// TODO(wasm): this addition is redundant with one inserted by {MemBuffer}.
Node* effective_offset = gasm_->IntAdd(MemBuffer(capped_offset), index);

Node* cond =
    gasm_->WordAnd(effective_offset, gasm_->IntPtrConstant(align_mask));
TrapIfFalse(wasm::kTrapUnalignedAccess,
            gasm_->Word32Equal(cond, Int32Constant(0)), position);
return index;
3801}

3803// Insert code to bounds check a memory access if necessary. Return the
3804// bounds-checked index, which is guaranteed to have (the equivalent of)
3805// {uintptr_t} representation.
3806std::pair<Node*, WasmGraphBuilder::BoundsCheckResult>
3807WasmGraphBuilder::BoundsCheckMem(uint8_t access_size, Node* index,
                               uint64_t offset,
                               wasm::WasmCodePosition position,
                               EnforceBoundsCheck enforce_check) {
DCHECK_LE(1, access_size)((void) 0);

// If the offset does not fit in a uintptr_t, this can never succeed on this
// machine.
if (offset > std::numeric_limits<uintptr_t>::max() ||
    !base::IsInBounds<uintptr_t>(offset, access_size,
                                 env_->max_memory_size)) {
  // The access will be out of bounds, even for the largest memory.
  TrapIfEq32(wasm::kTrapMemOutOfBounds, Int32Constant(0), 0, position);
  return {gasm_->UintPtrConstant(0), kOutOfBounds};
}

// Convert the index to uintptr.
if (!env_->module->is_memory64) {
  index = BuildChangeUint32ToUintPtr(index);
} else if (kSystemPointerSize == kInt32Size) {
  // In memory64 mode on 32-bit systems, the upper 32 bits need to be zero to
  // succeed the bounds check.
  DCHECK_NE(wasm::kTrapHandler, env_->bounds_checks)((void) 0);
  if (env_->bounds_checks == wasm::kExplicitBoundsChecks) {
    Node* high_word = gasm_->TruncateInt64ToInt32(
        gasm_->Word64Shr(index, Int32Constant(32)));
    TrapIfTrue(wasm::kTrapMemOutOfBounds, high_word, position);
  }
  // Only use the low word for the following bounds check.
  index = gasm_->TruncateInt64ToInt32(index);
}

// If no bounds checks should be performed (for testing), just return the
// converted index and assume it to be in-bounds.
if (env_->bounds_checks == wasm::kNoBoundsChecks) return {index, kInBounds};

// The accessed memory is [index + offset, index + end_offset].
// Check that the last read byte (at {index + end_offset}) is in bounds.
// 1) Check that {end_offset < mem_size}. This also ensures that we can safely
//    compute {effective_size} as {mem_size - end_offset)}.
//    {effective_size} is >= 1 if condition 1) holds.
// 2) Check that {index + end_offset < mem_size} by
//    - computing {effective_size} as {mem_size - end_offset} and
//    - checking that {index < effective_size}.

uintptr_t end_offset = offset + access_size - 1u;

UintPtrMatcher match(index);
if (match.HasResolvedValue() && end_offset <= env_->min_memory_size &&
    match.ResolvedValue() < env_->min_memory_size - end_offset) {
  // The input index is a constant and everything is statically within
  // bounds of the smallest possible memory.
  return {index, kInBounds};
}

if (env_->bounds_checks == wasm::kTrapHandler &&
    enforce_check == kCanOmitBoundsCheck) {
  return {index, kTrapHandler};
}

Node* mem_size = instance_cache_->mem_size;
Node* end_offset_node = mcgraph_->UintPtrConstant(end_offset);
if (end_offset > env_->min_memory_size) {
  // The end offset is larger than the smallest memory.
  // Dynamically check the end offset against the dynamic memory size.
  Node* cond = gasm_->UintLessThan(end_offset_node, mem_size);
  TrapIfFalse(wasm::kTrapMemOutOfBounds, cond, position);
}

// This produces a positive number since {end_offset <= min_size <= mem_size}.
Node* effective_size = gasm_->IntSub(mem_size, end_offset_node);

// Introduce the actual bounds check.
Node* cond = gasm_->UintLessThan(index, effective_size);
TrapIfFalse(wasm::kTrapMemOutOfBounds, cond, position);
return {index, kDynamicallyChecked};
3883}

3885const Operator* WasmGraphBuilder::GetSafeLoadOperator(int offset,
                                                    wasm::ValueType type) {
int alignment = offset % type.value_kind_size();
MachineType mach_type = type.machine_type();
if (COMPRESS_POINTERS_BOOLfalse && mach_type.IsTagged()) {
  // We are loading tagged value from off-heap location, so we need to load
  // it as a full word otherwise we will not be able to decompress it.
  mach_type = MachineType::Pointer();
}
if (alignment == 0 || mcgraph()->machine()->UnalignedLoadSupported(
                          type.machine_representation())) {
  return mcgraph()->machine()->Load(mach_type);
}
return mcgraph()->machine()->UnalignedLoad(mach_type);
3899}

3901const Operator* WasmGraphBuilder::GetSafeStoreOperator(int offset,
                                                     wasm::ValueType type) {
int alignment = offset % type.value_kind_size();
MachineRepresentation rep = type.machine_representation();
if (COMPRESS_POINTERS_BOOLfalse && IsAnyTagged(rep)) {
  // We are storing tagged value to off-heap location, so we need to store
  // it as a full word otherwise we will not be able to decompress it.
  rep = MachineType::PointerRepresentation();
}
if (alignment == 0 || mcgraph()->machine()->UnalignedStoreSupported(rep)) {
  StoreRepresentation store_rep(rep, WriteBarrierKind::kNoWriteBarrier);
  return mcgraph()->machine()->Store(store_rep);
}
UnalignedStoreRepresentation store_rep(rep);
return mcgraph()->machine()->UnalignedStore(store_rep);
3916}

3918void WasmGraphBuilder::TraceFunctionEntry(wasm::WasmCodePosition position) {
Node* call = BuildCallToRuntime(Runtime::kWasmTraceEnter, nullptr, 0);
SetSourcePosition(call, position);
3921}

3923void WasmGraphBuilder::TraceFunctionExit(base::Vector<Node*> vals,
                                       wasm::WasmCodePosition position) {
Node* info = gasm_->IntPtrConstant(0);
size_t num_returns = vals.size();
if (num_returns == 1) {
  wasm::ValueType return_type = sig_->GetReturn(0);
  MachineRepresentation rep = return_type.machine_representation();
  int size = ElementSizeInBytes(rep);
  info = gasm_->StackSlot(size, size);

  gasm_->Store(StoreRepresentation(rep, kNoWriteBarrier), info,
               Int32Constant(0), vals[0]);
}

Node* call = BuildCallToRuntime(Runtime::kWasmTraceExit, &info, 1);
SetSourcePosition(call, position);
3939}

3941void WasmGraphBuilder::TraceMemoryOperation(bool is_store,
                                          MachineRepresentation rep,
                                          Node* index, uintptr_t offset,
                                          wasm::WasmCodePosition position) {
int kAlign = 4;  // Ensure that the LSB is 0, such that this looks like a Smi.
TNode<RawPtrT> info =
    gasm_->StackSlot(sizeof(wasm::MemoryTracingInfo), kAlign);

Node* effective_offset = gasm_->IntAdd(gasm_->UintPtrConstant(offset), index);
auto store = [&](int field_offset, MachineRepresentation rep, Node* data) {
  gasm_->Store(StoreRepresentation(rep, kNoWriteBarrier), info,
               Int32Constant(field_offset), data);
};
// Store effective_offset, is_store, and mem_rep.
store(offsetof(wasm::MemoryTracingInfo, offset)__builtin_offsetof(wasm::MemoryTracingInfo, offset),
      MachineType::PointerRepresentation(), effective_offset);
store(offsetof(wasm::MemoryTracingInfo, is_store)__builtin_offsetof(wasm::MemoryTracingInfo, is_store),
      MachineRepresentation::kWord8, Int32Constant(is_store ? 1 : 0));
store(offsetof(wasm::MemoryTracingInfo, mem_rep)__builtin_offsetof(wasm::MemoryTracingInfo, mem_rep),
      MachineRepresentation::kWord8, Int32Constant(static_cast<int>(rep)));

Node* args[] = {info};
Node* call =
    BuildCallToRuntime(Runtime::kWasmTraceMemory, args, arraysize(args)(sizeof(ArraySizeHelper(args))));
SetSourcePosition(call, position);
3966}

3968namespace {
3969LoadTransformation GetLoadTransformation(
  MachineType memtype, wasm::LoadTransformationKind transform) {
switch (transform) {
  case wasm::LoadTransformationKind::kSplat: {
    if (memtype == MachineType::Int8()) {
      return LoadTransformation::kS128Load8Splat;
    } else if (memtype == MachineType::Int16()) {
      return LoadTransformation::kS128Load16Splat;
    } else if (memtype == MachineType::Int32()) {
      return LoadTransformation::kS128Load32Splat;
    } else if (memtype == MachineType::Int64()) {
      return LoadTransformation::kS128Load64Splat;
    }
    break;
  }
  case wasm::LoadTransformationKind::kExtend: {
    if (memtype == MachineType::Int8()) {
      return LoadTransformation::kS128Load8x8S;
    } else if (memtype == MachineType::Uint8()) {
      return LoadTransformation::kS128Load8x8U;
    } else if (memtype == MachineType::Int16()) {
      return LoadTransformation::kS128Load16x4S;
    } else if (memtype == MachineType::Uint16()) {
      return LoadTransformation::kS128Load16x4U;
    } else if (memtype == MachineType::Int32()) {
      return LoadTransformation::kS128Load32x2S;
    } else if (memtype == MachineType::Uint32()) {
      return LoadTransformation::kS128Load32x2U;
    }
    break;
  }
  case wasm::LoadTransformationKind::kZeroExtend: {
    if (memtype == MachineType::Int32()) {
      return LoadTransformation::kS128Load32Zero;
    } else if (memtype == MachineType::Int64()) {
      return LoadTransformation::kS128Load64Zero;
    }
    break;
  }
}
UNREACHABLE()V8_Fatal("unreachable code");
4010}

4012MemoryAccessKind GetMemoryAccessKind(
  MachineGraph* mcgraph, MachineRepresentation memrep,
  WasmGraphBuilder::BoundsCheckResult bounds_check_result) {
if (bounds_check_result == WasmGraphBuilder::kTrapHandler) {
  // Protected instructions do not come in an 'unaligned' flavor, so the trap
  // handler can currently only be used on systems where all memory accesses
  // are allowed to be unaligned.
  DCHECK(memrep == MachineRepresentation::kWord8 ||((void) 0)
         mcgraph->machine()->UnalignedLoadSupported(memrep))((void) 0);
  return MemoryAccessKind::kProtected;
}
if (memrep != MachineRepresentation::kWord8 &&
    !mcgraph->machine()->UnalignedLoadSupported(memrep)) {
  return MemoryAccessKind::kUnaligned;
}
return MemoryAccessKind::kNormal;
4028}
4029}  // namespace

4031Node* WasmGraphBuilder::LoadLane(wasm::ValueType type, MachineType memtype,
                               Node* value, Node* index, uint64_t offset,
                               uint32_t alignment, uint8_t laneidx,
                               wasm::WasmCodePosition position) {
has_simd_ = true;
Node* load;
uint8_t access_size = memtype.MemSize();
BoundsCheckResult bounds_check_result;
std::tie(index, bounds_check_result) =
    BoundsCheckMem(access_size, index, offset, position, kCanOmitBoundsCheck);

// {offset} is validated to be within uintptr_t range in {BoundsCheckMem}.
uintptr_t capped_offset = static_cast<uintptr_t>(offset);
MemoryAccessKind load_kind = GetMemoryAccessKind(
    mcgraph_, memtype.representation(), bounds_check_result);

load = SetEffect(graph()->NewNode(
    mcgraph()->machine()->LoadLane(load_kind, memtype, laneidx),
    MemBuffer(capped_offset), index, value, effect(), control()));

if (load_kind == MemoryAccessKind::kProtected) {
  SetSourcePosition(load, position);
}
if (FLAG_trace_wasm_memory) {
  TraceMemoryOperation(false, memtype.representation(), index, capped_offset,
                       position);
}

return load;
4060}

4062Node* WasmGraphBuilder::LoadTransform(wasm::ValueType type, MachineType memtype,
                                    wasm::LoadTransformationKind transform,
                                    Node* index, uint64_t offset,
                                    uint32_t alignment,
                                    wasm::WasmCodePosition position) {
has_simd_ = true;

Node* load;
// {offset} is validated to be within uintptr_t range in {BoundsCheckMem}.
uintptr_t capped_offset = static_cast<uintptr_t>(offset);

// Wasm semantics throw on OOB. Introduce explicit bounds check and
// conditioning when not using the trap handler.

// Load extends always load 8 bytes.
uint8_t access_size = transform == wasm::LoadTransformationKind::kExtend
                          ? 8
                          : memtype.MemSize();
BoundsCheckResult bounds_check_result;
std::tie(index, bounds_check_result) =
    BoundsCheckMem(access_size, index, offset, position, kCanOmitBoundsCheck);

LoadTransformation transformation = GetLoadTransformation(memtype, transform);
MemoryAccessKind load_kind = GetMemoryAccessKind(
    mcgraph_, memtype.representation(), bounds_check_result);

load = SetEffect(graph()->NewNode(
    mcgraph()->machine()->LoadTransform(load_kind, transformation),
    MemBuffer(capped_offset), index, effect(), control()));

if (load_kind == MemoryAccessKind::kProtected) {
  SetSourcePosition(load, position);
}

if (FLAG_trace_wasm_memory) {
  TraceMemoryOperation(false, memtype.representation(), index, capped_offset,
                       position);
}
return load;
4101}

4103Node* WasmGraphBuilder::LoadMem(wasm::ValueType type, MachineType memtype,
                              Node* index, uint64_t offset,
                              uint32_t alignment,
                              wasm::WasmCodePosition position) {
Node* load;

if (memtype.representation() == MachineRepresentation::kSimd128) {
  has_simd_ = true;
}

// Wasm semantics throw on OOB. Introduce explicit bounds check and
// conditioning when not using the trap handler.
BoundsCheckResult bounds_check_result;
std::tie(index, bounds_check_result) = BoundsCheckMem(
    memtype.MemSize(), index, offset, position, kCanOmitBoundsCheck);

// {offset} is validated to be within uintptr_t range in {BoundsCheckMem}.
uintptr_t capped_offset = static_cast<uintptr_t>(offset);

switch (GetMemoryAccessKind(mcgraph_, memtype.representation(),
                            bounds_check_result)) {
  case MemoryAccessKind::kUnaligned:
    load = gasm_->LoadUnaligned(memtype, MemBuffer(capped_offset), index);
    break;
  case MemoryAccessKind::kProtected:
    load = gasm_->ProtectedLoad(memtype, MemBuffer(capped_offset), index);
    SetSourcePosition(load, position);
    break;
  case MemoryAccessKind::kNormal:
    load = gasm_->Load(memtype, MemBuffer(capped_offset), index);
    break;
}

4136#if defined(V8_TARGET_BIG_ENDIAN)
load = BuildChangeEndiannessLoad(load, memtype, type);
4138#endif

if (type == wasm::kWasmI64 &&
    ElementSizeInBytes(memtype.representation()) < 8) {
  // TODO(titzer): TF zeroes the upper bits of 64-bit loads for subword sizes.
  load = memtype.IsSigned()
             ? gasm_->ChangeInt32ToInt64(load)     // sign extend
             : gasm_->ChangeUint32ToUint64(load);  // zero extend
}

if (FLAG_trace_wasm_memory) {
  TraceMemoryOperation(false, memtype.representation(), index, capped_offset,
                       position);
}

return load;
4154}

4156void WasmGraphBuilder::StoreLane(MachineRepresentation mem_rep, Node* index,
                               uint64_t offset, uint32_t alignment, Node* val,
                               uint8_t laneidx,
                               wasm::WasmCodePosition position,
                               wasm::ValueType type) {
has_simd_ = true;
BoundsCheckResult bounds_check_result;
std::tie(index, bounds_check_result) =
    BoundsCheckMem(i::ElementSizeInBytes(mem_rep), index, offset, position,
                   kCanOmitBoundsCheck);

// {offset} is validated to be within uintptr_t range in {BoundsCheckMem}.
uintptr_t capped_offset = static_cast<uintptr_t>(offset);
MemoryAccessKind load_kind =
    GetMemoryAccessKind(mcgraph_, mem_rep, bounds_check_result);

Node* store = SetEffect(graph()->NewNode(
    mcgraph()->machine()->StoreLane(load_kind, mem_rep, laneidx),
    MemBuffer(capped_offset), index, val, effect(), control()));

if (load_kind == MemoryAccessKind::kProtected) {
  SetSourcePosition(store, position);
}
if (FLAG_trace_wasm_memory) {
  TraceMemoryOperation(true, mem_rep, index, capped_offset, position);
}
4182}

4184void WasmGraphBuilder::StoreMem(MachineRepresentation mem_rep, Node* index,
                              uint64_t offset, uint32_t alignment, Node* val,
                              wasm::WasmCodePosition position,
                              wasm::ValueType type) {
if (mem_rep == MachineRepresentation::kSimd128) {
  has_simd_ = true;
}

BoundsCheckResult bounds_check_result;
std::tie(index, bounds_check_result) =
    BoundsCheckMem(i::ElementSizeInBytes(mem_rep), index, offset, position,
                   kCanOmitBoundsCheck);

4197#if defined(V8_TARGET_BIG_ENDIAN)
val = BuildChangeEndiannessStore(val, mem_rep, type);
4199#endif

// {offset} is validated to be within uintptr_t range in {BoundsCheckMem}.
uintptr_t capped_offset = static_cast<uintptr_t>(offset);

switch (GetMemoryAccessKind(mcgraph_, mem_rep, bounds_check_result)) {
  case MemoryAccessKind::kUnaligned:
    gasm_->StoreUnaligned(UnalignedStoreRepresentation{mem_rep},
                          MemBuffer(capped_offset), index, val);
    break;
  case MemoryAccessKind::kProtected:
    SetSourcePosition(
        gasm_->ProtectedStore(mem_rep, MemBuffer(capped_offset), index, val),
        position);
    break;
  case MemoryAccessKind::kNormal:
    gasm_->Store(StoreRepresentation{mem_rep, kNoWriteBarrier},
                 MemBuffer(capped_offset), index, val);
    break;
}

if (FLAG_trace_wasm_memory) {
  TraceMemoryOperation(true, mem_rep, index, capped_offset, position);
}
4223}

4225Node* WasmGraphBuilder::BuildAsmjsLoadMem(MachineType type, Node* index) {
DCHECK_NOT_NULL(instance_cache_)((void) 0);
Node* mem_start = instance_cache_->mem_start;
Node* mem_size = instance_cache_->mem_size;
DCHECK_NOT_NULL(mem_start)((void) 0);
DCHECK_NOT_NULL(mem_size)((void) 0);

// Asm.js semantics are defined in terms of typed arrays, hence OOB
// reads return {undefined} coerced to the result type (0 for integers, NaN
// for float and double).
// Note that we check against the memory size ignoring the size of the
// stored value, which is conservative if misaligned. Technically, asm.js
// should never have misaligned accesses.
index = BuildChangeUint32ToUintPtr(index);
Diamond bounds_check(graph(), mcgraph()->common(),
                     gasm_->UintLessThan(index, mem_size), BranchHint::kTrue);
bounds_check.Chain(control());

Node* load = graph()->NewNode(mcgraph()->machine()->Load(type), mem_start,
                              index, effect(), bounds_check.if_true);
SetEffectControl(bounds_check.EffectPhi(load, effect()), bounds_check.merge);

Node* oob_value;
switch (type.representation()) {
  case MachineRepresentation::kWord8:
  case MachineRepresentation::kWord16:
  case MachineRepresentation::kWord32:
    oob_value = Int32Constant(0);
    break;
  case MachineRepresentation::kWord64:
    oob_value = Int64Constant(0);
    break;
  case MachineRepresentation::kFloat32:
    oob_value = Float32Constant(std::numeric_limits<float>::quiet_NaN());
    break;
  case MachineRepresentation::kFloat64:
    oob_value = Float64Constant(std::numeric_limits<double>::quiet_NaN());
    break;
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}

return bounds_check.Phi(type.representation(), load, oob_value);
4268}

4270Node* WasmGraphBuilder::BuildAsmjsStoreMem(MachineType type, Node* index,
                                         Node* val) {
DCHECK_NOT_NULL(instance_cache_)((void) 0);
Node* mem_start = instance_cache_->mem_start;
Node* mem_size = instance_cache_->mem_size;
DCHECK_NOT_NULL(mem_start)((void) 0);
DCHECK_NOT_NULL(mem_size)((void) 0);

// Asm.js semantics are to ignore OOB writes.
// Note that we check against the memory size ignoring the size of the
// stored value, which is conservative if misaligned. Technically, asm.js
// should never have misaligned accesses.
Diamond bounds_check(graph(), mcgraph()->common(),
                     gasm_->Uint32LessThan(index, mem_size),
                     BranchHint::kTrue);
bounds_check.Chain(control());

index = BuildChangeUint32ToUintPtr(index);
const Operator* store_op = mcgraph()->machine()->Store(StoreRepresentation(
    type.representation(), WriteBarrierKind::kNoWriteBarrier));
Node* store = graph()->NewNode(store_op, mem_start, index, val, effect(),
                               bounds_check.if_true);
SetEffectControl(bounds_check.EffectPhi(store, effect()), bounds_check.merge);
return val;
4294}

4296Node* WasmGraphBuilder::BuildF64x2Ceil(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f64x2_ceil();
return BuildCFuncInstruction(ref, type, input);
4300}

4302Node* WasmGraphBuilder::BuildF64x2Floor(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f64x2_floor();
return BuildCFuncInstruction(ref, type, input);
4306}

4308Node* WasmGraphBuilder::BuildF64x2Trunc(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f64x2_trunc();
return BuildCFuncInstruction(ref, type, input);
4312}

4314Node* WasmGraphBuilder::BuildF64x2NearestInt(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f64x2_nearest_int();
return BuildCFuncInstruction(ref, type, input);
4318}

4320Node* WasmGraphBuilder::BuildF32x4Ceil(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f32x4_ceil();
return BuildCFuncInstruction(ref, type, input);
4324}

4326Node* WasmGraphBuilder::BuildF32x4Floor(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f32x4_floor();
return BuildCFuncInstruction(ref, type, input);
4330}

4332Node* WasmGraphBuilder::BuildF32x4Trunc(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f32x4_trunc();
return BuildCFuncInstruction(ref, type, input);
4336}

4338Node* WasmGraphBuilder::BuildF32x4NearestInt(Node* input) {
MachineType type = MachineType::Simd128();
ExternalReference ref = ExternalReference::wasm_f32x4_nearest_int();
return BuildCFuncInstruction(ref, type, input);
4342}

4344void WasmGraphBuilder::PrintDebugName(Node* node) {
PrintF("#%d:%s", node->id(), node->op()->mnemonic());
4346}

4348Graph* WasmGraphBuilder::graph() { return mcgraph()->graph(); }

4350Zone* WasmGraphBuilder::graph_zone() { return graph()->zone(); }

4352namespace {
4353Signature<MachineRepresentation>* CreateMachineSignature(
  Zone* zone, const wasm::FunctionSig* sig,
  WasmGraphBuilder::CallOrigin origin) {
Signature<MachineRepresentation>::Builder builder(zone, sig->return_count(),
                                                  sig->parameter_count());
for (auto ret : sig->returns()) {
  if (origin == WasmGraphBuilder::kCalledFromJS) {
    builder.AddReturn(MachineRepresentation::kTagged);
  } else {
    builder.AddReturn(ret.machine_representation());
  }
}

for (auto param : sig->parameters()) {
  if (origin == WasmGraphBuilder::kCalledFromJS) {
    // Parameters coming from JavaScript are always tagged values. Especially
    // when the signature says that it's an I64 value, then a BigInt object is
    // provided by JavaScript, and not two 32-bit parameters.
    builder.AddParam(MachineRepresentation::kTagged);
  } else {
    builder.AddParam(param.machine_representation());
  }
}
return builder.Build();
4377}

4379}  // namespace

4381void WasmGraphBuilder::AddInt64LoweringReplacement(
  CallDescriptor* original, CallDescriptor* replacement) {
if (!lowering_special_case_) {
  lowering_special_case_ = std::make_unique<Int64LoweringSpecialCase>();
}
lowering_special_case_->replacements.insert({original, replacement});
4387}

4389CallDescriptor* WasmGraphBuilder::GetI32AtomicWaitCallDescriptor() {
if (i32_atomic_wait_descriptor_) return i32_atomic_wait_descriptor_;

i32_atomic_wait_descriptor_ = GetBuiltinCallDescriptor(
    Builtin::kWasmI32AtomicWait64, zone_, StubCallMode::kCallWasmRuntimeStub);

AddInt64LoweringReplacement(
    i32_atomic_wait_descriptor_,
    GetBuiltinCallDescriptor(Builtin::kWasmI32AtomicWait32, zone_,
                             StubCallMode::kCallWasmRuntimeStub));

return i32_atomic_wait_descriptor_;
4401}

4403CallDescriptor* WasmGraphBuilder::GetI64AtomicWaitCallDescriptor() {
if (i64_atomic_wait_descriptor_) return i64_atomic_wait_descriptor_;

i64_atomic_wait_descriptor_ = GetBuiltinCallDescriptor(
    Builtin::kWasmI64AtomicWait64, zone_, StubCallMode::kCallWasmRuntimeStub);

AddInt64LoweringReplacement(
    i64_atomic_wait_descriptor_,
    GetBuiltinCallDescriptor(Builtin::kWasmI64AtomicWait32, zone_,
                             StubCallMode::kCallWasmRuntimeStub));

return i64_atomic_wait_descriptor_;
4415}

4417void WasmGraphBuilder::LowerInt64(Signature<MachineRepresentation>* sig) {
if (mcgraph()->machine()->Is64()) return;
Int64Lowering r(mcgraph()->graph(), mcgraph()->machine(), mcgraph()->common(),
                gasm_->simplified(), mcgraph()->zone(), sig,
                std::move(lowering_special_case_));
r.LowerGraph();
4423}

4425void WasmGraphBuilder::LowerInt64(CallOrigin origin) {
LowerInt64(CreateMachineSignature(mcgraph()->zone(), sig_, origin));
4427}

4429void WasmGraphBuilder::SetSourcePosition(Node* node,
                                       wasm::WasmCodePosition position) {
DCHECK_NE(position, wasm::kNoCodePosition)((void) 0);
if (source_position_table_) {
  source_position_table_->SetSourcePosition(node, SourcePosition(position));
}
4435}

4437Node* WasmGraphBuilder::S128Zero() {
has_simd_ = true;
return graph()->NewNode(mcgraph()->machine()->S128Zero());
4440}

4442Node* WasmGraphBuilder::SimdOp(wasm::WasmOpcode opcode, Node* const* inputs) {
has_simd_ = true;
switch (opcode) {
  case wasm::kExprF64x2Splat:
    return graph()->NewNode(mcgraph()->machine()->F64x2Splat(), inputs[0]);
  case wasm::kExprF64x2Abs:
    return graph()->NewNode(mcgraph()->machine()->F64x2Abs(), inputs[0]);
  case wasm::kExprF64x2Neg:
    return graph()->NewNode(mcgraph()->machine()->F64x2Neg(), inputs[0]);
  case wasm::kExprF64x2Sqrt:
    return graph()->NewNode(mcgraph()->machine()->F64x2Sqrt(), inputs[0]);
  case wasm::kExprF64x2Add:
    return graph()->NewNode(mcgraph()->machine()->F64x2Add(), inputs[0],
                            inputs[1]);
  case wasm::kExprF64x2Sub:
    return graph()->NewNode(mcgraph()->machine()->F64x2Sub(), inputs[0],
                            inputs[1]);
  case wasm::kExprF64x2Mul:
    return graph()->NewNode(mcgraph()->machine()->F64x2Mul(), inputs[0],
                            inputs[1]);
  case wasm::kExprF64x2Div:
    return graph()->NewNode(mcgraph()->machine()->F64x2Div(), inputs[0],
                            inputs[1]);
  case wasm::kExprF64x2Min:
    return graph()->NewNode(mcgraph()->machine()->F64x2Min(), inputs[0],
                            inputs[1]);
  case wasm::kExprF64x2Max:
    return graph()->NewNode(mcgraph()->machine()->F64x2Max(), inputs[0],
                            inputs[1]);
  case wasm::kExprF64x2Eq:
    return graph()->NewNode(mcgraph()->machine()->F64x2Eq(), inputs[0],
                            inputs[1]);
  case wasm::kExprF64x2Ne:
    return graph()->NewNode(mcgraph()->machine()->F64x2Ne(), inputs[0],
                            inputs[1]);
  case wasm::kExprF64x2Lt:
    return graph()->NewNode(mcgraph()->machine()->F64x2Lt(), inputs[0],
                            inputs[1]);
  case wasm::kExprF64x2Le:
    return graph()->NewNode(mcgraph()->machine()->F64x2Le(), inputs[0],
                            inputs[1]);
  case wasm::kExprF64x2Gt:
    return graph()->NewNode(mcgraph()->machine()->F64x2Lt(), inputs[1],
                            inputs[0]);
  case wasm::kExprF64x2Ge:
    return graph()->NewNode(mcgraph()->machine()->F64x2Le(), inputs[1],
                            inputs[0]);
  case wasm::kExprF64x2Qfma:
    return graph()->NewNode(mcgraph()->machine()->F64x2Qfma(), inputs[0],
                            inputs[1], inputs[2]);
  case wasm::kExprF64x2Qfms:
    return graph()->NewNode(mcgraph()->machine()->F64x2Qfms(), inputs[0],
                            inputs[1], inputs[2]);
  case wasm::kExprF64x2Pmin:
    return graph()->NewNode(mcgraph()->machine()->F64x2Pmin(), inputs[0],
                            inputs[1]);
  case wasm::kExprF64x2Pmax:
    return graph()->NewNode(mcgraph()->machine()->F64x2Pmax(), inputs[0],
                            inputs[1]);
  case wasm::kExprF64x2Ceil:
    // Architecture support for F64x2Ceil and Float64RoundUp is the same.
    if (!mcgraph()->machine()->Float64RoundUp().IsSupported())
      return BuildF64x2Ceil(inputs[0]);
    return graph()->NewNode(mcgraph()->machine()->F64x2Ceil(), inputs[0]);
  case wasm::kExprF64x2Floor:
    // Architecture support for F64x2Floor and Float64RoundDown is the same.
    if (!mcgraph()->machine()->Float64RoundDown().IsSupported())
      return BuildF64x2Floor(inputs[0]);
    return graph()->NewNode(mcgraph()->machine()->F64x2Floor(), inputs[0]);
  case wasm::kExprF64x2Trunc:
    // Architecture support for F64x2Trunc and Float64RoundTruncate is the
    // same.
    if (!mcgraph()->machine()->Float64RoundTruncate().IsSupported())
      return BuildF64x2Trunc(inputs[0]);
    return graph()->NewNode(mcgraph()->machine()->F64x2Trunc(), inputs[0]);
  case wasm::kExprF64x2NearestInt:
    // Architecture support for F64x2NearestInt and Float64RoundTiesEven is
    // the same.
    if (!mcgraph()->machine()->Float64RoundTiesEven().IsSupported())
      return BuildF64x2NearestInt(inputs[0]);
    return graph()->NewNode(mcgraph()->machine()->F64x2NearestInt(),
                            inputs[0]);
  case wasm::kExprF64x2ConvertLowI32x4S:
    return graph()->NewNode(mcgraph()->machine()->F64x2ConvertLowI32x4S(),
                            inputs[0]);
  case wasm::kExprF64x2ConvertLowI32x4U:
    return graph()->NewNode(mcgraph()->machine()->F64x2ConvertLowI32x4U(),
                            inputs[0]);
  case wasm::kExprF64x2PromoteLowF32x4:
    return graph()->NewNode(mcgraph()->machine()->F64x2PromoteLowF32x4(),
                            inputs[0]);
  case wasm::kExprF32x4Splat:
    return graph()->NewNode(mcgraph()->machine()->F32x4Splat(), inputs[0]);
  case wasm::kExprF32x4SConvertI32x4:
    return graph()->NewNode(mcgraph()->machine()->F32x4SConvertI32x4(),
                            inputs[0]);
  case wasm::kExprF32x4UConvertI32x4:
    return graph()->NewNode(mcgraph()->machine()->F32x4UConvertI32x4(),
                            inputs[0]);
  case wasm::kExprF32x4Abs:
    return graph()->NewNode(mcgraph()->machine()->F32x4Abs(), inputs[0]);
  case wasm::kExprF32x4Neg:
    return graph()->NewNode(mcgraph()->machine()->F32x4Neg(), inputs[0]);
  case wasm::kExprF32x4Sqrt:
    return graph()->NewNode(mcgraph()->machine()->F32x4Sqrt(), inputs[0]);
  case wasm::kExprF32x4RecipApprox:
    return graph()->NewNode(mcgraph()->machine()->F32x4RecipApprox(),
                            inputs[0]);
  case wasm::kExprF32x4RecipSqrtApprox:
    return graph()->NewNode(mcgraph()->machine()->F32x4RecipSqrtApprox(),
                            inputs[0]);
  case wasm::kExprF32x4Add:
    return graph()->NewNode(mcgraph()->machine()->F32x4Add(), inputs[0],
                            inputs[1]);
  case wasm::kExprF32x4Sub:
    return graph()->NewNode(mcgraph()->machine()->F32x4Sub(), inputs[0],
                            inputs[1]);
  case wasm::kExprF32x4Mul:
    return graph()->NewNode(mcgraph()->machine()->F32x4Mul(), inputs[0],
                            inputs[1]);
  case wasm::kExprF32x4Div:
    return graph()->NewNode(mcgraph()->machine()->F32x4Div(), inputs[0],
                            inputs[1]);
  case wasm::kExprF32x4Min:
    return graph()->NewNode(mcgraph()->machine()->F32x4Min(), inputs[0],
                            inputs[1]);
  case wasm::kExprF32x4Max:
    return graph()->NewNode(mcgraph()->machine()->F32x4Max(), inputs[0],
                            inputs[1]);
  case wasm::kExprF32x4Eq:
    return graph()->NewNode(mcgraph()->machine()->F32x4Eq(), inputs[0],
                            inputs[1]);
  case wasm::kExprF32x4Ne:
    return graph()->NewNode(mcgraph()->machine()->F32x4Ne(), inputs[0],
                            inputs[1]);
  case wasm::kExprF32x4Lt:
    return graph()->NewNode(mcgraph()->machine()->F32x4Lt(), inputs[0],
                            inputs[1]);
  case wasm::kExprF32x4Le:
    return graph()->NewNode(mcgraph()->machine()->F32x4Le(), inputs[0],
                            inputs[1]);
  case wasm::kExprF32x4Gt:
    return graph()->NewNode(mcgraph()->machine()->F32x4Lt(), inputs[1],
                            inputs[0]);
  case wasm::kExprF32x4Ge:
    return graph()->NewNode(mcgraph()->machine()->F32x4Le(), inputs[1],
                            inputs[0]);
  case wasm::kExprF32x4Qfma:
    return graph()->NewNode(mcgraph()->machine()->F32x4Qfma(), inputs[0],
                            inputs[1], inputs[2]);
  case wasm::kExprF32x4Qfms:
    return graph()->NewNode(mcgraph()->machine()->F32x4Qfms(), inputs[0],
                            inputs[1], inputs[2]);
  case wasm::kExprF32x4Pmin:
    return graph()->NewNode(mcgraph()->machine()->F32x4Pmin(), inputs[0],
                            inputs[1]);
  case wasm::kExprF32x4Pmax:
    return graph()->NewNode(mcgraph()->machine()->F32x4Pmax(), inputs[0],
                            inputs[1]);
  case wasm::kExprF32x4Ceil:
    // Architecture support for F32x4Ceil and Float32RoundUp is the same.
    if (!mcgraph()->machine()->Float32RoundUp().IsSupported())
      return BuildF32x4Ceil(inputs[0]);
    return graph()->NewNode(mcgraph()->machine()->F32x4Ceil(), inputs[0]);
  case wasm::kExprF32x4Floor:
    // Architecture support for F32x4Floor and Float32RoundDown is the same.
    if (!mcgraph()->machine()->Float32RoundDown().IsSupported())
      return BuildF32x4Floor(inputs[0]);
    return graph()->NewNode(mcgraph()->machine()->F32x4Floor(), inputs[0]);
  case wasm::kExprF32x4Trunc:
    // Architecture support for F32x4Trunc and Float32RoundTruncate is the
    // same.
    if (!mcgraph()->machine()->Float32RoundTruncate().IsSupported())
      return BuildF32x4Trunc(inputs[0]);
    return graph()->NewNode(mcgraph()->machine()->F32x4Trunc(), inputs[0]);
  case wasm::kExprF32x4NearestInt:
    // Architecture support for F32x4NearestInt and Float32RoundTiesEven is
    // the same.
    if (!mcgraph()->machine()->Float32RoundTiesEven().IsSupported())
      return BuildF32x4NearestInt(inputs[0]);
    return graph()->NewNode(mcgraph()->machine()->F32x4NearestInt(),
                            inputs[0]);
  case wasm::kExprF32x4DemoteF64x2Zero:
    return graph()->NewNode(mcgraph()->machine()->F32x4DemoteF64x2Zero(),
                            inputs[0]);
  case wasm::kExprI64x2Splat:
    return graph()->NewNode(mcgraph()->machine()->I64x2Splat(), inputs[0]);
  case wasm::kExprI64x2Abs:
    return graph()->NewNode(mcgraph()->machine()->I64x2Abs(), inputs[0]);
  case wasm::kExprI64x2Neg:
    return graph()->NewNode(mcgraph()->machine()->I64x2Neg(), inputs[0]);
  case wasm::kExprI64x2SConvertI32x4Low:
    return graph()->NewNode(mcgraph()->machine()->I64x2SConvertI32x4Low(),
                            inputs[0]);
  case wasm::kExprI64x2SConvertI32x4High:
    return graph()->NewNode(mcgraph()->machine()->I64x2SConvertI32x4High(),
                            inputs[0]);
  case wasm::kExprI64x2UConvertI32x4Low:
    return graph()->NewNode(mcgraph()->machine()->I64x2UConvertI32x4Low(),
                            inputs[0]);
  case wasm::kExprI64x2UConvertI32x4High:
    return graph()->NewNode(mcgraph()->machine()->I64x2UConvertI32x4High(),
                            inputs[0]);
  case wasm::kExprI64x2BitMask:
    return graph()->NewNode(mcgraph()->machine()->I64x2BitMask(), inputs[0]);
  case wasm::kExprI64x2Shl:
    return graph()->NewNode(mcgraph()->machine()->I64x2Shl(), inputs[0],
                            inputs[1]);
  case wasm::kExprI64x2ShrS:
    return graph()->NewNode(mcgraph()->machine()->I64x2ShrS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI64x2Add:
    return graph()->NewNode(mcgraph()->machine()->I64x2Add(), inputs[0],
                            inputs[1]);
  case wasm::kExprI64x2Sub:
    return graph()->NewNode(mcgraph()->machine()->I64x2Sub(), inputs[0],
                            inputs[1]);
  case wasm::kExprI64x2Mul:
    return graph()->NewNode(mcgraph()->machine()->I64x2Mul(), inputs[0],
                            inputs[1]);
  case wasm::kExprI64x2Eq:
    return graph()->NewNode(mcgraph()->machine()->I64x2Eq(), inputs[0],
                            inputs[1]);
  case wasm::kExprI64x2Ne:
    return graph()->NewNode(mcgraph()->machine()->I64x2Ne(), inputs[0],
                            inputs[1]);
  case wasm::kExprI64x2LtS:
    return graph()->NewNode(mcgraph()->machine()->I64x2GtS(), inputs[1],
                            inputs[0]);
  case wasm::kExprI64x2LeS:
    return graph()->NewNode(mcgraph()->machine()->I64x2GeS(), inputs[1],
                            inputs[0]);
  case wasm::kExprI64x2GtS:
    return graph()->NewNode(mcgraph()->machine()->I64x2GtS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI64x2GeS:
    return graph()->NewNode(mcgraph()->machine()->I64x2GeS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI64x2ShrU:
    return graph()->NewNode(mcgraph()->machine()->I64x2ShrU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI64x2ExtMulLowI32x4S:
    return graph()->NewNode(mcgraph()->machine()->I64x2ExtMulLowI32x4S(),
                            inputs[0], inputs[1]);
  case wasm::kExprI64x2ExtMulHighI32x4S:
    return graph()->NewNode(mcgraph()->machine()->I64x2ExtMulHighI32x4S(),
                            inputs[0], inputs[1]);
  case wasm::kExprI64x2ExtMulLowI32x4U:
    return graph()->NewNode(mcgraph()->machine()->I64x2ExtMulLowI32x4U(),
                            inputs[0], inputs[1]);
  case wasm::kExprI64x2ExtMulHighI32x4U:
    return graph()->NewNode(mcgraph()->machine()->I64x2ExtMulHighI32x4U(),
                            inputs[0], inputs[1]);
  case wasm::kExprI32x4Splat:
    return graph()->NewNode(mcgraph()->machine()->I32x4Splat(), inputs[0]);
  case wasm::kExprI32x4SConvertF32x4:
    return graph()->NewNode(mcgraph()->machine()->I32x4SConvertF32x4(),
                            inputs[0]);
  case wasm::kExprI32x4UConvertF32x4:
    return graph()->NewNode(mcgraph()->machine()->I32x4UConvertF32x4(),
                            inputs[0]);
  case wasm::kExprI32x4SConvertI16x8Low:
    return graph()->NewNode(mcgraph()->machine()->I32x4SConvertI16x8Low(),
                            inputs[0]);
  case wasm::kExprI32x4SConvertI16x8High:
    return graph()->NewNode(mcgraph()->machine()->I32x4SConvertI16x8High(),
                            inputs[0]);
  case wasm::kExprI32x4Neg:
    return graph()->NewNode(mcgraph()->machine()->I32x4Neg(), inputs[0]);
  case wasm::kExprI32x4Shl:
    return graph()->NewNode(mcgraph()->machine()->I32x4Shl(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4ShrS:
    return graph()->NewNode(mcgraph()->machine()->I32x4ShrS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4Add:
    return graph()->NewNode(mcgraph()->machine()->I32x4Add(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4Sub:
    return graph()->NewNode(mcgraph()->machine()->I32x4Sub(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4Mul:
    return graph()->NewNode(mcgraph()->machine()->I32x4Mul(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4MinS:
    return graph()->NewNode(mcgraph()->machine()->I32x4MinS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4MaxS:
    return graph()->NewNode(mcgraph()->machine()->I32x4MaxS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4Eq:
    return graph()->NewNode(mcgraph()->machine()->I32x4Eq(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4Ne:
    return graph()->NewNode(mcgraph()->machine()->I32x4Ne(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4LtS:
    return graph()->NewNode(mcgraph()->machine()->I32x4GtS(), inputs[1],
                            inputs[0]);
  case wasm::kExprI32x4LeS:
    return graph()->NewNode(mcgraph()->machine()->I32x4GeS(), inputs[1],
                            inputs[0]);
  case wasm::kExprI32x4GtS:
    return graph()->NewNode(mcgraph()->machine()->I32x4GtS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4GeS:
    return graph()->NewNode(mcgraph()->machine()->I32x4GeS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4UConvertI16x8Low:
    return graph()->NewNode(mcgraph()->machine()->I32x4UConvertI16x8Low(),
                            inputs[0]);
  case wasm::kExprI32x4UConvertI16x8High:
    return graph()->NewNode(mcgraph()->machine()->I32x4UConvertI16x8High(),
                            inputs[0]);
  case wasm::kExprI32x4ShrU:
    return graph()->NewNode(mcgraph()->machine()->I32x4ShrU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4MinU:
    return graph()->NewNode(mcgraph()->machine()->I32x4MinU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4MaxU:
    return graph()->NewNode(mcgraph()->machine()->I32x4MaxU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4LtU:
    return graph()->NewNode(mcgraph()->machine()->I32x4GtU(), inputs[1],
                            inputs[0]);
  case wasm::kExprI32x4LeU:
    return graph()->NewNode(mcgraph()->machine()->I32x4GeU(), inputs[1],
                            inputs[0]);
  case wasm::kExprI32x4GtU:
    return graph()->NewNode(mcgraph()->machine()->I32x4GtU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4GeU:
    return graph()->NewNode(mcgraph()->machine()->I32x4GeU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4Abs:
    return graph()->NewNode(mcgraph()->machine()->I32x4Abs(), inputs[0]);
  case wasm::kExprI32x4BitMask:
    return graph()->NewNode(mcgraph()->machine()->I32x4BitMask(), inputs[0]);
  case wasm::kExprI32x4DotI16x8S:
    return graph()->NewNode(mcgraph()->machine()->I32x4DotI16x8S(), inputs[0],
                            inputs[1]);
  case wasm::kExprI32x4ExtMulLowI16x8S:
    return graph()->NewNode(mcgraph()->machine()->I32x4ExtMulLowI16x8S(),
                            inputs[0], inputs[1]);
  case wasm::kExprI32x4ExtMulHighI16x8S:
    return graph()->NewNode(mcgraph()->machine()->I32x4ExtMulHighI16x8S(),
                            inputs[0], inputs[1]);
  case wasm::kExprI32x4ExtMulLowI16x8U:
    return graph()->NewNode(mcgraph()->machine()->I32x4ExtMulLowI16x8U(),
                            inputs[0], inputs[1]);
  case wasm::kExprI32x4ExtMulHighI16x8U:
    return graph()->NewNode(mcgraph()->machine()->I32x4ExtMulHighI16x8U(),
                            inputs[0], inputs[1]);
  case wasm::kExprI32x4ExtAddPairwiseI16x8S:
    return graph()->NewNode(mcgraph()->machine()->I32x4ExtAddPairwiseI16x8S(),
                            inputs[0]);
  case wasm::kExprI32x4ExtAddPairwiseI16x8U:
    return graph()->NewNode(mcgraph()->machine()->I32x4ExtAddPairwiseI16x8U(),
                            inputs[0]);
  case wasm::kExprI32x4TruncSatF64x2SZero:
    return graph()->NewNode(mcgraph()->machine()->I32x4TruncSatF64x2SZero(),
                            inputs[0]);
  case wasm::kExprI32x4TruncSatF64x2UZero:
    return graph()->NewNode(mcgraph()->machine()->I32x4TruncSatF64x2UZero(),
                            inputs[0]);
  case wasm::kExprI16x8Splat:
    return graph()->NewNode(mcgraph()->machine()->I16x8Splat(), inputs[0]);
  case wasm::kExprI16x8SConvertI8x16Low:
    return graph()->NewNode(mcgraph()->machine()->I16x8SConvertI8x16Low(),
                            inputs[0]);
  case wasm::kExprI16x8SConvertI8x16High:
    return graph()->NewNode(mcgraph()->machine()->I16x8SConvertI8x16High(),
                            inputs[0]);
  case wasm::kExprI16x8Shl:
    return graph()->NewNode(mcgraph()->machine()->I16x8Shl(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8ShrS:
    return graph()->NewNode(mcgraph()->machine()->I16x8ShrS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8Neg:
    return graph()->NewNode(mcgraph()->machine()->I16x8Neg(), inputs[0]);
  case wasm::kExprI16x8SConvertI32x4:
    return graph()->NewNode(mcgraph()->machine()->I16x8SConvertI32x4(),
                            inputs[0], inputs[1]);
  case wasm::kExprI16x8Add:
    return graph()->NewNode(mcgraph()->machine()->I16x8Add(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8AddSatS:
    return graph()->NewNode(mcgraph()->machine()->I16x8AddSatS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8Sub:
    return graph()->NewNode(mcgraph()->machine()->I16x8Sub(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8SubSatS:
    return graph()->NewNode(mcgraph()->machine()->I16x8SubSatS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8Mul:
    return graph()->NewNode(mcgraph()->machine()->I16x8Mul(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8MinS:
    return graph()->NewNode(mcgraph()->machine()->I16x8MinS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8MaxS:
    return graph()->NewNode(mcgraph()->machine()->I16x8MaxS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8Eq:
    return graph()->NewNode(mcgraph()->machine()->I16x8Eq(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8Ne:
    return graph()->NewNode(mcgraph()->machine()->I16x8Ne(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8LtS:
    return graph()->NewNode(mcgraph()->machine()->I16x8GtS(), inputs[1],
                            inputs[0]);
  case wasm::kExprI16x8LeS:
    return graph()->NewNode(mcgraph()->machine()->I16x8GeS(), inputs[1],
                            inputs[0]);
  case wasm::kExprI16x8GtS:
    return graph()->NewNode(mcgraph()->machine()->I16x8GtS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8GeS:
    return graph()->NewNode(mcgraph()->machine()->I16x8GeS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8UConvertI8x16Low:
    return graph()->NewNode(mcgraph()->machine()->I16x8UConvertI8x16Low(),
                            inputs[0]);
  case wasm::kExprI16x8UConvertI8x16High:
    return graph()->NewNode(mcgraph()->machine()->I16x8UConvertI8x16High(),
                            inputs[0]);
  case wasm::kExprI16x8UConvertI32x4:
    return graph()->NewNode(mcgraph()->machine()->I16x8UConvertI32x4(),
                            inputs[0], inputs[1]);
  case wasm::kExprI16x8ShrU:
    return graph()->NewNode(mcgraph()->machine()->I16x8ShrU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8AddSatU:
    return graph()->NewNode(mcgraph()->machine()->I16x8AddSatU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8SubSatU:
    return graph()->NewNode(mcgraph()->machine()->I16x8SubSatU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8MinU:
    return graph()->NewNode(mcgraph()->machine()->I16x8MinU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8MaxU:
    return graph()->NewNode(mcgraph()->machine()->I16x8MaxU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8LtU:
    return graph()->NewNode(mcgraph()->machine()->I16x8GtU(), inputs[1],
                            inputs[0]);
  case wasm::kExprI16x8LeU:
    return graph()->NewNode(mcgraph()->machine()->I16x8GeU(), inputs[1],
                            inputs[0]);
  case wasm::kExprI16x8GtU:
    return graph()->NewNode(mcgraph()->machine()->I16x8GtU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8GeU:
    return graph()->NewNode(mcgraph()->machine()->I16x8GeU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI16x8RoundingAverageU:
    return graph()->NewNode(mcgraph()->machine()->I16x8RoundingAverageU(),
                            inputs[0], inputs[1]);
  case wasm::kExprI16x8Q15MulRSatS:
    return graph()->NewNode(mcgraph()->machine()->I16x8Q15MulRSatS(),
                            inputs[0], inputs[1]);
  case wasm::kExprI16x8Abs:
    return graph()->NewNode(mcgraph()->machine()->I16x8Abs(), inputs[0]);
  case wasm::kExprI16x8BitMask:
    return graph()->NewNode(mcgraph()->machine()->I16x8BitMask(), inputs[0]);
  case wasm::kExprI16x8ExtMulLowI8x16S:
    return graph()->NewNode(mcgraph()->machine()->I16x8ExtMulLowI8x16S(),
                            inputs[0], inputs[1]);
  case wasm::kExprI16x8ExtMulHighI8x16S:
    return graph()->NewNode(mcgraph()->machine()->I16x8ExtMulHighI8x16S(),
                            inputs[0], inputs[1]);
  case wasm::kExprI16x8ExtMulLowI8x16U:
    return graph()->NewNode(mcgraph()->machine()->I16x8ExtMulLowI8x16U(),
                            inputs[0], inputs[1]);
  case wasm::kExprI16x8ExtMulHighI8x16U:
    return graph()->NewNode(mcgraph()->machine()->I16x8ExtMulHighI8x16U(),
                            inputs[0], inputs[1]);
  case wasm::kExprI16x8ExtAddPairwiseI8x16S:
    return graph()->NewNode(mcgraph()->machine()->I16x8ExtAddPairwiseI8x16S(),
                            inputs[0]);
  case wasm::kExprI16x8ExtAddPairwiseI8x16U:
    return graph()->NewNode(mcgraph()->machine()->I16x8ExtAddPairwiseI8x16U(),
                            inputs[0]);
  case wasm::kExprI8x16Splat:
    return graph()->NewNode(mcgraph()->machine()->I8x16Splat(), inputs[0]);
  case wasm::kExprI8x16Neg:
    return graph()->NewNode(mcgraph()->machine()->I8x16Neg(), inputs[0]);
  case wasm::kExprI8x16Shl:
    return graph()->NewNode(mcgraph()->machine()->I8x16Shl(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16ShrS:
    return graph()->NewNode(mcgraph()->machine()->I8x16ShrS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16SConvertI16x8:
    return graph()->NewNode(mcgraph()->machine()->I8x16SConvertI16x8(),
                            inputs[0], inputs[1]);
  case wasm::kExprI8x16Add:
    return graph()->NewNode(mcgraph()->machine()->I8x16Add(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16AddSatS:
    return graph()->NewNode(mcgraph()->machine()->I8x16AddSatS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16Sub:
    return graph()->NewNode(mcgraph()->machine()->I8x16Sub(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16SubSatS:
    return graph()->NewNode(mcgraph()->machine()->I8x16SubSatS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16MinS:
    return graph()->NewNode(mcgraph()->machine()->I8x16MinS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16MaxS:
    return graph()->NewNode(mcgraph()->machine()->I8x16MaxS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16Eq:
    return graph()->NewNode(mcgraph()->machine()->I8x16Eq(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16Ne:
    return graph()->NewNode(mcgraph()->machine()->I8x16Ne(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16LtS:
    return graph()->NewNode(mcgraph()->machine()->I8x16GtS(), inputs[1],
                            inputs[0]);
  case wasm::kExprI8x16LeS:
    return graph()->NewNode(mcgraph()->machine()->I8x16GeS(), inputs[1],
                            inputs[0]);
  case wasm::kExprI8x16GtS:
    return graph()->NewNode(mcgraph()->machine()->I8x16GtS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16GeS:
    return graph()->NewNode(mcgraph()->machine()->I8x16GeS(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16ShrU:
    return graph()->NewNode(mcgraph()->machine()->I8x16ShrU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16UConvertI16x8:
    return graph()->NewNode(mcgraph()->machine()->I8x16UConvertI16x8(),
                            inputs[0], inputs[1]);
  case wasm::kExprI8x16AddSatU:
    return graph()->NewNode(mcgraph()->machine()->I8x16AddSatU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16SubSatU:
    return graph()->NewNode(mcgraph()->machine()->I8x16SubSatU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16MinU:
    return graph()->NewNode(mcgraph()->machine()->I8x16MinU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16MaxU:
    return graph()->NewNode(mcgraph()->machine()->I8x16MaxU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16LtU:
    return graph()->NewNode(mcgraph()->machine()->I8x16GtU(), inputs[1],
                            inputs[0]);
  case wasm::kExprI8x16LeU:
    return graph()->NewNode(mcgraph()->machine()->I8x16GeU(), inputs[1],
                            inputs[0]);
  case wasm::kExprI8x16GtU:
    return graph()->NewNode(mcgraph()->machine()->I8x16GtU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16GeU:
    return graph()->NewNode(mcgraph()->machine()->I8x16GeU(), inputs[0],
                            inputs[1]);
  case wasm::kExprI8x16RoundingAverageU:
    return graph()->NewNode(mcgraph()->machine()->I8x16RoundingAverageU(),
                            inputs[0], inputs[1]);
  case wasm::kExprI8x16Popcnt:
    return graph()->NewNode(mcgraph()->machine()->I8x16Popcnt(), inputs[0]);
  case wasm::kExprI8x16Abs:
    return graph()->NewNode(mcgraph()->machine()->I8x16Abs(), inputs[0]);
  case wasm::kExprI8x16BitMask:
    return graph()->NewNode(mcgraph()->machine()->I8x16BitMask(), inputs[0]);
  case wasm::kExprS128And:
    return graph()->NewNode(mcgraph()->machine()->S128And(), inputs[0],
                            inputs[1]);
  case wasm::kExprS128Or:
    return graph()->NewNode(mcgraph()->machine()->S128Or(), inputs[0],
                            inputs[1]);
  case wasm::kExprS128Xor:
    return graph()->NewNode(mcgraph()->machine()->S128Xor(), inputs[0],
                            inputs[1]);
  case wasm::kExprS128Not:
    return graph()->NewNode(mcgraph()->machine()->S128Not(), inputs[0]);
  case wasm::kExprS128Select:
    return graph()->NewNode(mcgraph()->machine()->S128Select(), inputs[2],
                            inputs[0], inputs[1]);
  case wasm::kExprS128AndNot:
    return graph()->NewNode(mcgraph()->machine()->S128AndNot(), inputs[0],
                            inputs[1]);
  case wasm::kExprI64x2AllTrue:
    return graph()->NewNode(mcgraph()->machine()->I64x2AllTrue(), inputs[0]);
  case wasm::kExprI32x4AllTrue:
    return graph()->NewNode(mcgraph()->machine()->I32x4AllTrue(), inputs[0]);
  case wasm::kExprI16x8AllTrue:
    return graph()->NewNode(mcgraph()->machine()->I16x8AllTrue(), inputs[0]);
  case wasm::kExprV128AnyTrue:
    return graph()->NewNode(mcgraph()->machine()->V128AnyTrue(), inputs[0]);
  case wasm::kExprI8x16AllTrue:
    return graph()->NewNode(mcgraph()->machine()->I8x16AllTrue(), inputs[0]);
  case wasm::kExprI8x16Swizzle:
    return graph()->NewNode(mcgraph()->machine()->I8x16Swizzle(false),
                            inputs[0], inputs[1]);
  case wasm::kExprI8x16RelaxedSwizzle:
    return graph()->NewNode(mcgraph()->machine()->I8x16Swizzle(true),
                            inputs[0], inputs[1]);
  case wasm::kExprI8x16RelaxedLaneSelect:
    // Relaxed lane select puts the mask as first input (same as S128Select).
    return graph()->NewNode(mcgraph()->machine()->I8x16RelaxedLaneSelect(),
                            inputs[2], inputs[0], inputs[1]);
  case wasm::kExprI16x8RelaxedLaneSelect:
    return graph()->NewNode(mcgraph()->machine()->I16x8RelaxedLaneSelect(),
                            inputs[2], inputs[0], inputs[1]);
  case wasm::kExprI32x4RelaxedLaneSelect:
    return graph()->NewNode(mcgraph()->machine()->I32x4RelaxedLaneSelect(),
                            inputs[2], inputs[0], inputs[1]);
  case wasm::kExprI64x2RelaxedLaneSelect:
    return graph()->NewNode(mcgraph()->machine()->I64x2RelaxedLaneSelect(),
                            inputs[2], inputs[0], inputs[1]);
  case wasm::kExprF32x4RelaxedMin:
    return graph()->NewNode(mcgraph()->machine()->F32x4RelaxedMin(),
                            inputs[0], inputs[1]);
  case wasm::kExprF32x4RelaxedMax:
    return graph()->NewNode(mcgraph()->machine()->F32x4RelaxedMax(),
                            inputs[0], inputs[1]);
  case wasm::kExprF64x2RelaxedMin:
    return graph()->NewNode(mcgraph()->machine()->F64x2RelaxedMin(),
                            inputs[0], inputs[1]);
  case wasm::kExprF64x2RelaxedMax:
    return graph()->NewNode(mcgraph()->machine()->F64x2RelaxedMax(),
                            inputs[0], inputs[1]);
  case wasm::kExprI32x4RelaxedTruncF64x2SZero:
    return graph()->NewNode(
        mcgraph()->machine()->I32x4RelaxedTruncF64x2SZero(), inputs[0]);
  case wasm::kExprI32x4RelaxedTruncF64x2UZero:
    return graph()->NewNode(
        mcgraph()->machine()->I32x4RelaxedTruncF64x2UZero(), inputs[0]);
  case wasm::kExprI32x4RelaxedTruncF32x4S:
    return graph()->NewNode(mcgraph()->machine()->I32x4RelaxedTruncF32x4S(),
                            inputs[0]);
  case wasm::kExprI32x4RelaxedTruncF32x4U:
    return graph()->NewNode(mcgraph()->machine()->I32x4RelaxedTruncF32x4U(),
                            inputs[0]);
  default:
    FATAL_UNSUPPORTED_OPCODE(opcode);
}
5091}

5093Node* WasmGraphBuilder::SimdLaneOp(wasm::WasmOpcode opcode, uint8_t lane,
                                 Node* const* inputs) {
has_simd_ = true;
switch (opcode) {
  case wasm::kExprF64x2ExtractLane:
    return graph()->NewNode(mcgraph()->machine()->F64x2ExtractLane(lane),
                            inputs[0]);
  case wasm::kExprF64x2ReplaceLane:
    return graph()->NewNode(mcgraph()->machine()->F64x2ReplaceLane(lane),
                            inputs[0], inputs[1]);
  case wasm::kExprF32x4ExtractLane:
    return graph()->NewNode(mcgraph()->machine()->F32x4ExtractLane(lane),
                            inputs[0]);
  case wasm::kExprF32x4ReplaceLane:
    return graph()->NewNode(mcgraph()->machine()->F32x4ReplaceLane(lane),
                            inputs[0], inputs[1]);
  case wasm::kExprI64x2ExtractLane:
    return graph()->NewNode(mcgraph()->machine()->I64x2ExtractLane(lane),
                            inputs[0]);
  case wasm::kExprI64x2ReplaceLane:
    return graph()->NewNode(mcgraph()->machine()->I64x2ReplaceLane(lane),
                            inputs[0], inputs[1]);
  case wasm::kExprI32x4ExtractLane:
    return graph()->NewNode(mcgraph()->machine()->I32x4ExtractLane(lane),
                            inputs[0]);
  case wasm::kExprI32x4ReplaceLane:
    return graph()->NewNode(mcgraph()->machine()->I32x4ReplaceLane(lane),
                            inputs[0], inputs[1]);
  case wasm::kExprI16x8ExtractLaneS:
    return graph()->NewNode(mcgraph()->machine()->I16x8ExtractLaneS(lane),
                            inputs[0]);
  case wasm::kExprI16x8ExtractLaneU:
    return graph()->NewNode(mcgraph()->machine()->I16x8ExtractLaneU(lane),
                            inputs[0]);
  case wasm::kExprI16x8ReplaceLane:
    return graph()->NewNode(mcgraph()->machine()->I16x8ReplaceLane(lane),
                            inputs[0], inputs[1]);
  case wasm::kExprI8x16ExtractLaneS:
    return graph()->NewNode(mcgraph()->machine()->I8x16ExtractLaneS(lane),
                            inputs[0]);
  case wasm::kExprI8x16ExtractLaneU:
    return graph()->NewNode(mcgraph()->machine()->I8x16ExtractLaneU(lane),
                            inputs[0]);
  case wasm::kExprI8x16ReplaceLane:
    return graph()->NewNode(mcgraph()->machine()->I8x16ReplaceLane(lane),
                            inputs[0], inputs[1]);
  default:
    FATAL_UNSUPPORTED_OPCODE(opcode);
}
5142}

5144Node* WasmGraphBuilder::Simd8x16ShuffleOp(const uint8_t shuffle[16],
                                        Node* const* inputs) {
has_simd_ = true;
return graph()->NewNode(mcgraph()->machine()->I8x16Shuffle(shuffle),
                        inputs[0], inputs[1]);
5149}

5151Node* WasmGraphBuilder::AtomicOp(wasm::WasmOpcode opcode, Node* const* inputs,
                               uint32_t alignment, uint64_t offset,
                               wasm::WasmCodePosition position) {
struct AtomicOpInfo {
  enum Type : int8_t {
    kNoInput = 0,
    kOneInput = 1,
    kTwoInputs = 2,
    kSpecial
  };

  using OperatorByType =
      const Operator* (MachineOperatorBuilder::*)(MachineType);
  using OperatorByRep =
      const Operator* (MachineOperatorBuilder::*)(MachineRepresentation);
  using OperatorByAtomicLoadRep =
      const Operator* (MachineOperatorBuilder::*)(AtomicLoadParameters);
  using OperatorByAtomicStoreRep =
      const Operator* (MachineOperatorBuilder::*)(AtomicStoreParameters);

  const Type type;
  const MachineType machine_type;
  const OperatorByType operator_by_type = nullptr;
  const OperatorByRep operator_by_rep = nullptr;
  const OperatorByAtomicLoadRep operator_by_atomic_load_params = nullptr;
  const OperatorByAtomicStoreRep operator_by_atomic_store_rep = nullptr;
  const wasm::ValueType wasm_type;

  constexpr AtomicOpInfo(Type t, MachineType m, OperatorByType o)
      : type(t), machine_type(m), operator_by_type(o) {}
  constexpr AtomicOpInfo(Type t, MachineType m, OperatorByRep o)
      : type(t), machine_type(m), operator_by_rep(o) {}
  constexpr AtomicOpInfo(Type t, MachineType m, OperatorByAtomicLoadRep o,
                         wasm::ValueType v)
      : type(t),
        machine_type(m),
        operator_by_atomic_load_params(o),
        wasm_type(v) {}
  constexpr AtomicOpInfo(Type t, MachineType m, OperatorByAtomicStoreRep o,
                         wasm::ValueType v)
      : type(t),
        machine_type(m),
        operator_by_atomic_store_rep(o),
        wasm_type(v) {}

  // Constexpr, hence just a table lookup in most compilers.
  static constexpr AtomicOpInfo Get(wasm::WasmOpcode opcode) {
    switch (opcode) {
5199#define CASE(Name, Type, MachType, Op) \
case wasm::kExpr##Name:              \
  return {Type, MachineType::MachType(), &MachineOperatorBuilder::Op};
5202#define CASE_LOAD_STORE(Name, Type, MachType, Op, WasmType)             \
case wasm::kExpr##Name:                                               \
  return {Type, MachineType::MachType(), &MachineOperatorBuilder::Op, \
          WasmType};

      // Binops.
      CASE(I32AtomicAdd, kOneInput, Uint32, Word32AtomicAdd)
      CASE(I64AtomicAdd, kOneInput, Uint64, Word64AtomicAdd)
      CASE(I32AtomicAdd8U, kOneInput, Uint8, Word32AtomicAdd)
      CASE(I32AtomicAdd16U, kOneInput, Uint16, Word32AtomicAdd)
      CASE(I64AtomicAdd8U, kOneInput, Uint8, Word64AtomicAdd)
      CASE(I64AtomicAdd16U, kOneInput, Uint16, Word64AtomicAdd)
      CASE(I64AtomicAdd32U, kOneInput, Uint32, Word64AtomicAdd)
      CASE(I32AtomicSub, kOneInput, Uint32, Word32AtomicSub)
      CASE(I64AtomicSub, kOneInput, Uint64, Word64AtomicSub)
      CASE(I32AtomicSub8U, kOneInput, Uint8, Word32AtomicSub)
      CASE(I32AtomicSub16U, kOneInput, Uint16, Word32AtomicSub)
      CASE(I64AtomicSub8U, kOneInput, Uint8, Word64AtomicSub)
      CASE(I64AtomicSub16U, kOneInput, Uint16, Word64AtomicSub)
      CASE(I64AtomicSub32U, kOneInput, Uint32, Word64AtomicSub)
      CASE(I32AtomicAnd, kOneInput, Uint32, Word32AtomicAnd)
      CASE(I64AtomicAnd, kOneInput, Uint64, Word64AtomicAnd)
      CASE(I32AtomicAnd8U, kOneInput, Uint8, Word32AtomicAnd)
      CASE(I32AtomicAnd16U, kOneInput, Uint16, Word32AtomicAnd)
      CASE(I64AtomicAnd8U, kOneInput, Uint8, Word64AtomicAnd)
      CASE(I64AtomicAnd16U, kOneInput, Uint16, Word64AtomicAnd)
      CASE(I64AtomicAnd32U, kOneInput, Uint32, Word64AtomicAnd)
      CASE(I32AtomicOr, kOneInput, Uint32, Word32AtomicOr)
      CASE(I64AtomicOr, kOneInput, Uint64, Word64AtomicOr)
      CASE(I32AtomicOr8U, kOneInput, Uint8, Word32AtomicOr)
      CASE(I32AtomicOr16U, kOneInput, Uint16, Word32AtomicOr)
      CASE(I64AtomicOr8U, kOneInput, Uint8, Word64AtomicOr)
      CASE(I64AtomicOr16U, kOneInput, Uint16, Word64AtomicOr)
      CASE(I64AtomicOr32U, kOneInput, Uint32, Word64AtomicOr)
      CASE(I32AtomicXor, kOneInput, Uint32, Word32AtomicXor)
      CASE(I64AtomicXor, kOneInput, Uint64, Word64AtomicXor)
      CASE(I32AtomicXor8U, kOneInput, Uint8, Word32AtomicXor)
      CASE(I32AtomicXor16U, kOneInput, Uint16, Word32AtomicXor)
      CASE(I64AtomicXor8U, kOneInput, Uint8, Word64AtomicXor)
      CASE(I64AtomicXor16U, kOneInput, Uint16, Word64AtomicXor)
      CASE(I64AtomicXor32U, kOneInput, Uint32, Word64AtomicXor)
      CASE(I32AtomicExchange, kOneInput, Uint32, Word32AtomicExchange)
      CASE(I64AtomicExchange, kOneInput, Uint64, Word64AtomicExchange)
      CASE(I32AtomicExchange8U, kOneInput, Uint8, Word32AtomicExchange)
      CASE(I32AtomicExchange16U, kOneInput, Uint16, Word32AtomicExchange)
      CASE(I64AtomicExchange8U, kOneInput, Uint8, Word64AtomicExchange)
      CASE(I64AtomicExchange16U, kOneInput, Uint16, Word64AtomicExchange)
      CASE(I64AtomicExchange32U, kOneInput, Uint32, Word64AtomicExchange)

      // Compare-exchange.
      CASE(I32AtomicCompareExchange, kTwoInputs, Uint32,
           Word32AtomicCompareExchange)
      CASE(I64AtomicCompareExchange, kTwoInputs, Uint64,
           Word64AtomicCompareExchange)
      CASE(I32AtomicCompareExchange8U, kTwoInputs, Uint8,
           Word32AtomicCompareExchange)
      CASE(I32AtomicCompareExchange16U, kTwoInputs, Uint16,
           Word32AtomicCompareExchange)
      CASE(I64AtomicCompareExchange8U, kTwoInputs, Uint8,
           Word64AtomicCompareExchange)
      CASE(I64AtomicCompareExchange16U, kTwoInputs, Uint16,
           Word64AtomicCompareExchange)
      CASE(I64AtomicCompareExchange32U, kTwoInputs, Uint32,
           Word64AtomicCompareExchange)

      // Load.
      CASE_LOAD_STORE(I32AtomicLoad, kNoInput, Uint32, Word32AtomicLoad,
                      wasm::kWasmI32)
      CASE_LOAD_STORE(I64AtomicLoad, kNoInput, Uint64, Word64AtomicLoad,
                      wasm::kWasmI64)
      CASE_LOAD_STORE(I32AtomicLoad8U, kNoInput, Uint8, Word32AtomicLoad,
                      wasm::kWasmI32)
      CASE_LOAD_STORE(I32AtomicLoad16U, kNoInput, Uint16, Word32AtomicLoad,
                      wasm::kWasmI32)
      CASE_LOAD_STORE(I64AtomicLoad8U, kNoInput, Uint8, Word64AtomicLoad,
                      wasm::kWasmI64)
      CASE_LOAD_STORE(I64AtomicLoad16U, kNoInput, Uint16, Word64AtomicLoad,
                      wasm::kWasmI64)
      CASE_LOAD_STORE(I64AtomicLoad32U, kNoInput, Uint32, Word64AtomicLoad,
                      wasm::kWasmI64)

      // Store.
      CASE_LOAD_STORE(I32AtomicStore, kOneInput, Uint32, Word32AtomicStore,
                      wasm::kWasmI32)
      CASE_LOAD_STORE(I64AtomicStore, kOneInput, Uint64, Word64AtomicStore,
                      wasm::kWasmI64)
      CASE_LOAD_STORE(I32AtomicStore8U, kOneInput, Uint8, Word32AtomicStore,
                      wasm::kWasmI32)
      CASE_LOAD_STORE(I32AtomicStore16U, kOneInput, Uint16, Word32AtomicStore,
                      wasm::kWasmI32)
      CASE_LOAD_STORE(I64AtomicStore8U, kOneInput, Uint8, Word64AtomicStore,
                      wasm::kWasmI64)
      CASE_LOAD_STORE(I64AtomicStore16U, kOneInput, Uint16, Word64AtomicStore,
                      wasm::kWasmI64)
      CASE_LOAD_STORE(I64AtomicStore32U, kOneInput, Uint32, Word64AtomicStore,
                      wasm::kWasmI64)

5299#undef CASE
5300#undef CASE_LOAD_STORE

      case wasm::kExprAtomicNotify:
        return {kSpecial, MachineType::Int32(), OperatorByType{nullptr}};
      case wasm::kExprI32AtomicWait:
        return {kSpecial, MachineType::Int32(), OperatorByType{nullptr}};
      case wasm::kExprI64AtomicWait:
        return {kSpecial, MachineType::Int64(), OperatorByType{nullptr}};
      default:
        UNREACHABLE()V8_Fatal("unreachable code");
    }
  }
};

AtomicOpInfo info = AtomicOpInfo::Get(opcode);

Node* index = CheckBoundsAndAlignment(info.machine_type.MemSize(), inputs[0],
                                      offset, position);

// {offset} is validated to be within uintptr_t range in {BoundsCheckMem}.
uintptr_t capped_offset = static_cast<uintptr_t>(offset);
if (info.type != AtomicOpInfo::kSpecial) {
  const Operator* op;
  if (info.operator_by_type) {
    op = (mcgraph()->machine()->*info.operator_by_type)(info.machine_type);
  } else if (info.operator_by_rep) {
    op = (mcgraph()->machine()->*info.operator_by_rep)(
        info.machine_type.representation());
  } else if (info.operator_by_atomic_load_params) {
    op = (mcgraph()->machine()->*info.operator_by_atomic_load_params)(
        AtomicLoadParameters(info.machine_type, AtomicMemoryOrder::kSeqCst));
  } else {
    op = (mcgraph()->machine()->*info.operator_by_atomic_store_rep)(
        AtomicStoreParameters(info.machine_type.representation(),
                              WriteBarrierKind::kNoWriteBarrier,
                              AtomicMemoryOrder::kSeqCst));
  }

  Node* input_nodes[6] = {MemBuffer(capped_offset), index};
  int num_actual_inputs = info.type;
  std::copy_n(inputs + 1, num_actual_inputs, input_nodes + 2);
  input_nodes[num_actual_inputs + 2] = effect();
  input_nodes[num_actual_inputs + 3] = control();

5344#ifdef V8_TARGET_BIG_ENDIAN
  // Reverse the value bytes before storing.
  if (info.operator_by_atomic_store_rep) {
    input_nodes[num_actual_inputs + 1] = BuildChangeEndiannessStore(
        input_nodes[num_actual_inputs + 1],
        info.machine_type.representation(), info.wasm_type);
  }
5351#endif

  Node* result = gasm_->AddNode(
      graph()->NewNode(op, num_actual_inputs + 4, input_nodes));

5356#ifdef V8_TARGET_BIG_ENDIAN
  // Reverse the value bytes after load.
  if (info.operator_by_atomic_load_params) {
    result =
        BuildChangeEndiannessLoad(result, info.machine_type, info.wasm_type);
  }
5362#endif

  return result;
}

// After we've bounds-checked, compute the effective offset.
Node* effective_offset =
    gasm_->IntAdd(gasm_->UintPtrConstant(capped_offset), index);

switch (opcode) {
  case wasm::kExprAtomicNotify:
    return gasm_->CallRuntimeStub(wasm::WasmCode::kWasmAtomicNotify,
                                  Operator::kNoThrow, effective_offset,
                                  inputs[1]);

  case wasm::kExprI32AtomicWait: {
    auto* call_descriptor = GetI32AtomicWaitCallDescriptor();

    intptr_t target = mcgraph()->machine()->Is64()
                          ? wasm::WasmCode::kWasmI32AtomicWait64
                          : wasm::WasmCode::kWasmI32AtomicWait32;
    Node* call_target = mcgraph()->RelocatableIntPtrConstant(
        target, RelocInfo::WASM_STUB_CALL);

    return gasm_->Call(call_descriptor, call_target, effective_offset,
                       inputs[1], inputs[2]);
  }

  case wasm::kExprI64AtomicWait: {
    auto* call_descriptor = GetI64AtomicWaitCallDescriptor();

    intptr_t target = mcgraph()->machine()->Is64()
                          ? wasm::WasmCode::kWasmI64AtomicWait64
                          : wasm::WasmCode::kWasmI64AtomicWait32;
    Node* call_target = mcgraph()->RelocatableIntPtrConstant(
        target, RelocInfo::WASM_STUB_CALL);

    return gasm_->Call(call_descriptor, call_target, effective_offset,
                       inputs[1], inputs[2]);
  }

  default:
    FATAL_UNSUPPORTED_OPCODE(opcode);
}
5406}

5408void WasmGraphBuilder::AtomicFence() {
SetEffect(graph()->NewNode(mcgraph()->machine()->MemBarrier(), effect(),
                           control()));
5411}

5413void WasmGraphBuilder::MemoryInit(uint32_t data_segment_index, Node* dst,
                                Node* src, Node* size,
                                wasm::WasmCodePosition position) {
// The data segment index must be in bounds since it is required by
// validation.
DCHECK_LT(data_segment_index, env_->module->num_declared_data_segments)((void) 0);

Node* function =
    gasm_->ExternalConstant(ExternalReference::wasm_memory_init());

MemTypeToUintPtrOrOOBTrap({&dst}, position);

Node* stack_slot = StoreArgsInStackSlot(
    {{MachineType::PointerRepresentation(), GetInstance()},
     {MachineType::PointerRepresentation(), dst},
     {MachineRepresentation::kWord32, src},
     {MachineRepresentation::kWord32,
      gasm_->Uint32Constant(data_segment_index)},
     {MachineRepresentation::kWord32, size}});

auto sig = FixedSizeSignature<MachineType>::Returns(MachineType::Int32())
               .Params(MachineType::Pointer());
Node* call = BuildCCall(&sig, function, stack_slot);
// TODO(manoskouk): Also throw kDataSegmentOutOfBounds.
TrapIfFalse(wasm::kTrapMemOutOfBounds, call, position);
5438}

5440void WasmGraphBuilder::DataDrop(uint32_t data_segment_index,
                              wasm::WasmCodePosition position) {
DCHECK_LT(data_segment_index, env_->module->num_declared_data_segments)((void) 0);

Node* seg_size_array =
    LOAD_INSTANCE_FIELD(DataSegmentSizes, MachineType::Pointer());
STATIC_ASSERT(wasm::kV8MaxWasmDataSegments <= kMaxUInt32 >> 2)static_assert(wasm::kV8MaxWasmDataSegments <= kMaxUInt32 >>
 2, "wasm::kV8MaxWasmDataSegments <= kMaxUInt32 >> 2"
);
auto access = ObjectAccess(MachineType::Int32(), kNoWriteBarrier);
gasm_->StoreToObject(access, seg_size_array, data_segment_index << 2,
                     Int32Constant(0));
5450}

5452Node* WasmGraphBuilder::StoreArgsInStackSlot(
  std::initializer_list<std::pair<MachineRepresentation, Node*>> args) {
int slot_size = 0;
for (auto arg : args) {
  slot_size += ElementSizeInBytes(arg.first);
}
DCHECK_LT(0, slot_size)((void) 0);
Node* stack_slot =
    graph()->NewNode(mcgraph()->machine()->StackSlot(slot_size));

int offset = 0;
for (auto arg : args) {
  MachineRepresentation type = arg.first;
  Node* value = arg.second;
  gasm_->StoreUnaligned(type, stack_slot, Int32Constant(offset), value);
  offset += ElementSizeInBytes(type);
}
return stack_slot;
5470}

5472void WasmGraphBuilder::MemTypeToUintPtrOrOOBTrap(
  std::initializer_list<Node**> nodes, wasm::WasmCodePosition position) {
if (!env_->module->is_memory64) {
  for (Node** node : nodes) {
    *node = BuildChangeUint32ToUintPtr(*node);
  }
  return;
}
if (kSystemPointerSize == kInt64Size) return;  // memory64 on 64-bit
Node* any_high_word = nullptr;
for (Node** node : nodes) {
  Node* high_word =
      gasm_->TruncateInt64ToInt32(gasm_->Word64Shr(*node, Int32Constant(32)));
  any_high_word =
      any_high_word ? gasm_->Word32Or(any_high_word, high_word) : high_word;
  // Only keep the low word as uintptr_t.
  *node = gasm_->TruncateInt64ToInt32(*node);
}
TrapIfTrue(wasm::kTrapMemOutOfBounds, any_high_word, position);
5491}

5493void WasmGraphBuilder::MemoryCopy(Node* dst, Node* src, Node* size,
                                wasm::WasmCodePosition position) {
Node* function =
    gasm_->ExternalConstant(ExternalReference::wasm_memory_copy());

MemTypeToUintPtrOrOOBTrap({&dst, &src, &size}, position);

Node* stack_slot = StoreArgsInStackSlot(
    {{MachineType::PointerRepresentation(), GetInstance()},
     {MachineType::PointerRepresentation(), dst},
     {MachineType::PointerRepresentation(), src},
     {MachineType::PointerRepresentation(), size}});

auto sig = FixedSizeSignature<MachineType>::Returns(MachineType::Int32())
               .Params(MachineType::Pointer());
Node* call = BuildCCall(&sig, function, stack_slot);
TrapIfFalse(wasm::kTrapMemOutOfBounds, call, position);
5510}

5512void WasmGraphBuilder::MemoryFill(Node* dst, Node* value, Node* size,
                                wasm::WasmCodePosition position) {
Node* function =
    gasm_->ExternalConstant(ExternalReference::wasm_memory_fill());

MemTypeToUintPtrOrOOBTrap({&dst, &size}, position);

Node* stack_slot = StoreArgsInStackSlot(
    {{MachineType::PointerRepresentation(), GetInstance()},
     {MachineType::PointerRepresentation(), dst},
     {MachineRepresentation::kWord32, value},
     {MachineType::PointerRepresentation(), size}});

auto sig = FixedSizeSignature<MachineType>::Returns(MachineType::Int32())
               .Params(MachineType::Pointer());
Node* call = BuildCCall(&sig, function, stack_slot);
TrapIfFalse(wasm::kTrapMemOutOfBounds, call, position);
5529}

5531void WasmGraphBuilder::TableInit(uint32_t table_index,
                               uint32_t elem_segment_index, Node* dst,
                               Node* src, Node* size,
                               wasm::WasmCodePosition position) {
gasm_->CallRuntimeStub(wasm::WasmCode::kWasmTableInit, Operator::kNoThrow,
                       dst, src, size, gasm_->NumberConstant(table_index),
                       gasm_->NumberConstant(elem_segment_index));
5538}

5540void WasmGraphBuilder::ElemDrop(uint32_t elem_segment_index,
                              wasm::WasmCodePosition position) {
// The elem segment index must be in bounds since it is required by
// validation.
DCHECK_LT(elem_segment_index, env_->module->elem_segments.size())((void) 0);

Node* dropped_elem_segments =
    LOAD_INSTANCE_FIELD(DroppedElemSegments, MachineType::Pointer());
auto store_rep =
    StoreRepresentation(MachineRepresentation::kWord8, kNoWriteBarrier);
gasm_->Store(store_rep, dropped_elem_segments, elem_segment_index,
             Int32Constant(1));
5552}

5554void WasmGraphBuilder::TableCopy(uint32_t table_dst_index,
                               uint32_t table_src_index, Node* dst, Node* src,
                               Node* size, wasm::WasmCodePosition position) {
gasm_->CallRuntimeStub(wasm::WasmCode::kWasmTableCopy, Operator::kNoThrow,
                       dst, src, size, gasm_->NumberConstant(table_dst_index),
                       gasm_->NumberConstant(table_src_index));
5560}

5562Node* WasmGraphBuilder::TableGrow(uint32_t table_index, Node* value,
                                Node* delta) {
return BuildChangeSmiToInt32(gasm_->CallRuntimeStub(
    wasm::WasmCode::kWasmTableGrow, Operator::kNoThrow,
    graph()->NewNode(mcgraph()->common()->NumberConstant(table_index)), delta,
    value));
5568}

5570Node* WasmGraphBuilder::TableSize(uint32_t table_index) {
Node* tables = LOAD_INSTANCE_FIELD(Tables, MachineType::TaggedPointer());
Node* table = gasm_->LoadFixedArrayElementAny(tables, table_index);

int length_field_size = WasmTableObject::kCurrentLengthOffsetEnd -
                        WasmTableObject::kCurrentLengthOffset + 1;
Node* length_smi = gasm_->LoadFromObject(
    assert_size(length_field_size, MachineType::TaggedSigned()), table,
    wasm::ObjectAccess::ToTagged(WasmTableObject::kCurrentLengthOffset));

return BuildChangeSmiToInt32(length_smi);
5581}

5583void WasmGraphBuilder::TableFill(uint32_t table_index, Node* start, Node* value,
                               Node* count) {
gasm_->CallRuntimeStub(
    wasm::WasmCode::kWasmTableFill, Operator::kNoThrow,
    graph()->NewNode(mcgraph()->common()->NumberConstant(table_index)), start,
    count, value);
5589}

5591Node* WasmGraphBuilder::StructNewWithRtt(uint32_t struct_index,
                                       const wasm::StructType* type,
                                       Node* rtt,
                                       base::Vector<Node*> fields) {
int size = WasmStruct::Size(type);
Node* s = gasm_->Allocate(size);
gasm_->StoreMap(s, rtt);
gasm_->InitializeImmutableInObject(
    ObjectAccess(MachineType::TaggedPointer(), kNoWriteBarrier), s,
    wasm::ObjectAccess::ToTagged(JSReceiver::kPropertiesOrHashOffset),
    LOAD_ROOT(EmptyFixedArray, empty_fixed_array));
for (uint32_t i = 0; i < type->field_count(); i++) {
  gasm_->StoreStructField(s, type, i, fields[i]);
}
// If this assert fails then initialization of padding field might be
// necessary.
static_assert(Heap::kMinObjectSizeInTaggedWords == 2 &&
                  WasmStruct::kHeaderSize == 2 * kTaggedSize,
              "empty struct might require initialization of padding field");
return s;
5611}

5613Builtin ChooseArrayAllocationBuiltin(wasm::ValueType element_type,
                                   Node* initial_value) {
if (initial_value != nullptr) {
  // {initial_value} will be used for initialization after allocation.
  return Builtin::kWasmAllocateArray_Uninitialized;
}
if (element_type.is_reference()) {
  return Builtin::kWasmAllocateArray_InitNull;
}
return Builtin::kWasmAllocateArray_InitZero;
5623}

5625Node* WasmGraphBuilder::ArrayNewWithRtt(uint32_t array_index,
                                      const wasm::ArrayType* type,
                                      Node* length, Node* initial_value,
                                      Node* rtt,
                                      wasm::WasmCodePosition position) {
TrapIfFalse(wasm::kTrapArrayTooLarge,
            gasm_->Uint32LessThanOrEqual(
                length, gasm_->Uint32Constant(WasmArray::MaxLength(type))),
            position);
wasm::ValueType element_type = type->element_type();
// TODO(7748): Consider using gasm_->Allocate().
Builtin stub = ChooseArrayAllocationBuiltin(element_type, initial_value);
// Do NOT mark this as Operator::kEliminatable, because that would cause the
// Call node to have no control inputs, which means it could get scheduled
// before the check/trap above.
Node* a =
    gasm_->CallBuiltin(stub, Operator::kNoDeopt | Operator::kNoThrow, rtt,
                       length, Int32Constant(element_type.value_kind_size()));
if (initial_value != nullptr) {
  // TODO(manoskouk): If the loop is ever removed here, we have to update
  // ArrayNewWithRtt() in graph-builder-interface.cc to not mark the current
  // loop as non-innermost.
  auto loop = gasm_->MakeLoopLabel(MachineRepresentation::kWord32);
  auto done = gasm_->MakeLabel();
  Node* start_offset =
      Int32Constant(wasm::ObjectAccess::ToTagged(WasmArray::kHeaderSize));
  Node* element_size = Int32Constant(element_type.value_kind_size());
  Node* end_offset =
      gasm_->Int32Add(start_offset, gasm_->Int32Mul(element_size, length));
  gasm_->Goto(&loop, start_offset);
  gasm_->Bind(&loop);
  {
    Node* offset = loop.PhiAt(0);
    Node* check = gasm_->Uint32LessThan(offset, end_offset);
    gasm_->GotoIfNot(check, &done);
    gasm_->StoreToObject(ObjectAccessForGCStores(type->element_type()), a,
                         offset, initial_value);
    offset = gasm_->Int32Add(offset, element_size);
    gasm_->Goto(&loop, offset);
  }
  gasm_->Bind(&done);
}
return a;
5668}

5670Node* WasmGraphBuilder::ArrayInit(const wasm::ArrayType* type, Node* rtt,
                                base::Vector<Node*> elements) {
wasm::ValueType element_type = type->element_type();
// TODO(7748): Consider using gasm_->Allocate().
Node* array =
    gasm_->CallBuiltin(Builtin::kWasmAllocateArray_Uninitialized,
                       Operator::kNoDeopt | Operator::kNoThrow, rtt,
                       Int32Constant(static_cast<int32_t>(elements.size())),
                       Int32Constant(element_type.value_kind_size()));
for (int i = 0; i < static_cast<int>(elements.size()); i++) {
  Node* offset =
      gasm_->WasmArrayElementOffset(Int32Constant(i), element_type);
  if (type->mutability()) {
    gasm_->StoreToObject(ObjectAccessForGCStores(element_type), array, offset,
                         elements[i]);
  } else {
    gasm_->InitializeImmutableInObject(ObjectAccessForGCStores(element_type),
                                       array, offset, elements[i]);
  }
}
return array;
5691}

5693Node* WasmGraphBuilder::ArrayInitFromData(const wasm::ArrayType* type,
                                        uint32_t data_segment, Node* offset,
                                        Node* length, Node* rtt,
                                        wasm::WasmCodePosition position) {
Node* array = gasm_->CallBuiltin(
    Builtin::kWasmArrayInitFromData, Operator::kNoDeopt | Operator::kNoThrow,
    gasm_->Uint32Constant(data_segment), offset, length, rtt);
TrapIfTrue(wasm::kTrapArrayTooLarge,
           gasm_->TaggedEqual(
               array, gasm_->NumberConstant(
                          wasm::kArrayInitFromDataArrayTooLargeErrorCode)),
           position);
TrapIfTrue(
    wasm::kTrapDataSegmentOutOfBounds,
    gasm_->TaggedEqual(
        array, gasm_->NumberConstant(
                   wasm::kArrayInitFromDataSegmentOutOfBoundsErrorCode)),
    position);
return array;
5712}

5714Node* WasmGraphBuilder::RttCanon(uint32_t type_index) {
Node* maps_list =
    LOAD_INSTANCE_FIELD(ManagedObjectMaps, MachineType::TaggedPointer());
return gasm_->LoadImmutable(
    MachineType::TaggedPointer(), maps_list,
    wasm::ObjectAccess::ElementOffsetInTaggedFixedArray(type_index));
5720}

5722WasmGraphBuilder::Callbacks WasmGraphBuilder::TestCallbacks(
  GraphAssemblerLabel<1>* label) {
return {// succeed_if
        [=](Node* condition, BranchHint hint) -> void {
          gasm_->GotoIf(condition, label, hint, Int32Constant(1));
        },
        // fail_if
        [=](Node* condition, BranchHint hint) -> void {
          gasm_->GotoIf(condition, label, hint, Int32Constant(0));
        },
        // fail_if_not
        [=](Node* condition, BranchHint hint) -> void {
          gasm_->GotoIfNot(condition, label, hint, Int32Constant(0));
        }};
5736}

5738WasmGraphBuilder::Callbacks WasmGraphBuilder::CastCallbacks(
  GraphAssemblerLabel<0>* label, wasm::WasmCodePosition position) {
return {// succeed_if
        [=](Node* condition, BranchHint hint) -> void {
          gasm_->GotoIf(condition, label, hint);
        },
        // fail_if
        [=](Node* condition, BranchHint hint) -> void {
          TrapIfTrue(wasm::kTrapIllegalCast, condition, position);
        },
        // fail_if_not
        [=](Node* condition, BranchHint hint) -> void {
          TrapIfFalse(wasm::kTrapIllegalCast, condition, position);
        }};
5752}

5754WasmGraphBuilder::Callbacks WasmGraphBuilder::BranchCallbacks(
  SmallNodeVector& no_match_controls, SmallNodeVector& no_match_effects,
  SmallNodeVector& match_controls, SmallNodeVector& match_effects) {
return {
    // succeed_if
    [&](Node* condition, BranchHint hint) -> void {
      Node* branch = graph()->NewNode(mcgraph()->common()->Branch(hint),
                                      condition, control());
      match_controls.emplace_back(
          graph()->NewNode(mcgraph()->common()->IfTrue(), branch));
      match_effects.emplace_back(effect());
      SetControl(graph()->NewNode(mcgraph()->common()->IfFalse(), branch));
    },
    // fail_if
    [&](Node* condition, BranchHint hint) -> void {
      Node* branch = graph()->NewNode(mcgraph()->common()->Branch(hint),
                                      condition, control());
      no_match_controls.emplace_back(
          graph()->NewNode(mcgraph()->common()->IfTrue(), branch));
      no_match_effects.emplace_back(effect());
      SetControl(graph()->NewNode(mcgraph()->common()->IfFalse(), branch));
    },
    // fail_if_not
    [&](Node* condition, BranchHint hint) -> void {
      Node* branch = graph()->NewNode(mcgraph()->common()->Branch(hint),
                                      condition, control());
      no_match_controls.emplace_back(
          graph()->NewNode(mcgraph()->common()->IfFalse(), branch));
      no_match_effects.emplace_back(effect());
      SetControl(graph()->NewNode(mcgraph()->common()->IfTrue(), branch));
    }};
5785}

5787void WasmGraphBuilder::TypeCheck(
  Node* object, Node* rtt, WasmGraphBuilder::ObjectReferenceKnowledge config,
  bool null_succeeds, Callbacks callbacks) {
if (config.object_can_be_null) {
  (null_succeeds ? callbacks.succeed_if : callbacks.fail_if)(
      IsNull(object), BranchHint::kFalse);
}

Node* map = gasm_->LoadMap(object);

// First, check if types happen to be equal. This has been shown to give large
// speedups.
callbacks.succeed_if(gasm_->TaggedEqual(map, rtt), BranchHint::kTrue);

Node* type_info = gasm_->LoadWasmTypeInfo(map);
Node* supertypes = gasm_->LoadSupertypes(type_info);
Node* rtt_depth = gasm_->UintPtrConstant(config.rtt_depth);

// If the depth of the rtt is known to be less that the minimum supertype
// array length, we can access the supertype without bounds-checking the
// supertype array.
if (config.rtt_depth >= wasm::kMinimumSupertypeArraySize) {
  Node* supertypes_length =
      BuildChangeSmiToIntPtr(gasm_->LoadFixedArrayLengthAsSmi(supertypes));
  callbacks.fail_if_not(gasm_->UintLessThan(rtt_depth, supertypes_length),
                        BranchHint::kTrue);
}
Node* maybe_match = gasm_->LoadImmutableFixedArrayElement(
    supertypes, rtt_depth, MachineType::TaggedPointer());

callbacks.fail_if_not(gasm_->TaggedEqual(maybe_match, rtt),
                      BranchHint::kTrue);
5819}

5821void WasmGraphBuilder::DataCheck(Node* object, bool object_can_be_null,
                               Callbacks callbacks) {
if (object_can_be_null) {
  callbacks.fail_if(IsNull(object), BranchHint::kFalse);
}
callbacks.fail_if(gasm_->IsI31(object), BranchHint::kFalse);
Node* map = gasm_->LoadMap(object);
callbacks.fail_if_not(gasm_->IsDataRefMap(map), BranchHint::kTrue);
5829}

5831void WasmGraphBuilder::ManagedObjectInstanceCheck(Node* object,
                                                bool object_can_be_null,
                                                InstanceType instance_type,
                                                Callbacks callbacks) {
if (object_can_be_null) {
  callbacks.fail_if(IsNull(object), BranchHint::kFalse);
}
callbacks.fail_if(gasm_->IsI31(object), BranchHint::kFalse);
callbacks.fail_if_not(gasm_->HasInstanceType(object, instance_type),
                      BranchHint::kTrue);
5841}

5843void WasmGraphBuilder::BrOnCastAbs(
  Node** match_control, Node** match_effect, Node** no_match_control,
  Node** no_match_effect, std::function<void(Callbacks)> type_checker) {
SmallNodeVector no_match_controls, no_match_effects, match_controls,
    match_effects;

type_checker(BranchCallbacks(no_match_controls, no_match_effects,
                             match_controls, match_effects));

match_controls.emplace_back(control());
match_effects.emplace_back(effect());

// Wire up the control/effect nodes.
unsigned count = static_cast<unsigned>(match_controls.size());
DCHECK_EQ(match_controls.size(), match_effects.size())((void) 0);
*match_control = Merge(count, match_controls.data());
// EffectPhis need their control dependency as an additional input.
match_effects.emplace_back(*match_control);
*match_effect = EffectPhi(count, match_effects.data());
DCHECK_EQ(no_match_controls.size(), no_match_effects.size())((void) 0);
// Range is 2..4, so casting to unsigned is safe.
count = static_cast<unsigned>(no_match_controls.size());
*no_match_control = Merge(count, no_match_controls.data());
// EffectPhis need their control dependency as an additional input.
no_match_effects.emplace_back(*no_match_control);
*no_match_effect = EffectPhi(count, no_match_effects.data());
5869}

5871Node* WasmGraphBuilder::RefTest(Node* object, Node* rtt,
                              ObjectReferenceKnowledge config) {
auto done = gasm_->MakeLabel(MachineRepresentation::kWord32);
TypeCheck(object, rtt, config, false, TestCallbacks(&done));
gasm_->Goto(&done, Int32Constant(1));
gasm_->Bind(&done);
return done.PhiAt(0);
5878}

5880Node* WasmGraphBuilder::RefCast(Node* object, Node* rtt,
                              ObjectReferenceKnowledge config,
                              wasm::WasmCodePosition position) {
if (!FLAG_experimental_wasm_assume_ref_cast_succeeds) {
  auto done = gasm_->MakeLabel();
  TypeCheck(object, rtt, config, true, CastCallbacks(&done, position));
  gasm_->Goto(&done);
  gasm_->Bind(&done);
}
return object;
5890}

5892void WasmGraphBuilder::BrOnCast(Node* object, Node* rtt,
                              ObjectReferenceKnowledge config,
                              Node** match_control, Node** match_effect,
                              Node** no_match_control,
                              Node** no_match_effect) {
BrOnCastAbs(match_control, match_effect, no_match_control, no_match_effect,
            [=](Callbacks callbacks) -> void {
              return TypeCheck(object, rtt, config, false, callbacks);
            });
5901}

5903Node* WasmGraphBuilder::RefIsData(Node* object, bool object_can_be_null) {
auto done = gasm_->MakeLabel(MachineRepresentation::kWord32);
DataCheck(object, object_can_be_null, TestCallbacks(&done));
gasm_->Goto(&done, Int32Constant(1));
gasm_->Bind(&done);
return done.PhiAt(0);
5909}

5911Node* WasmGraphBuilder::RefAsData(Node* object, bool object_can_be_null,
                                wasm::WasmCodePosition position) {
auto done = gasm_->MakeLabel();
DataCheck(object, object_can_be_null, CastCallbacks(&done, position));
gasm_->Goto(&done);
gasm_->Bind(&done);
return object;
5918}

5920void WasmGraphBuilder::BrOnData(Node* object, Node* /*rtt*/,
                              ObjectReferenceKnowledge config,
                              Node** match_control, Node** match_effect,
                              Node** no_match_control,
                              Node** no_match_effect) {
BrOnCastAbs(match_control, match_effect, no_match_control, no_match_effect,
            [=](Callbacks callbacks) -> void {
              return DataCheck(object, config.object_can_be_null, callbacks);
            });
5929}

5931Node* WasmGraphBuilder::RefIsFunc(Node* object, bool object_can_be_null) {
auto done = gasm_->MakeLabel(MachineRepresentation::kWord32);
ManagedObjectInstanceCheck(object, object_can_be_null,
                           WASM_INTERNAL_FUNCTION_TYPE, TestCallbacks(&done));
gasm_->Goto(&done, Int32Constant(1));
gasm_->Bind(&done);
return done.PhiAt(0);
5938}

5940Node* WasmGraphBuilder::RefAsFunc(Node* object, bool object_can_be_null,
                                wasm::WasmCodePosition position) {
auto done = gasm_->MakeLabel();
ManagedObjectInstanceCheck(object, object_can_be_null,
                           WASM_INTERNAL_FUNCTION_TYPE,
                           CastCallbacks(&done, position));
gasm_->Goto(&done);
gasm_->Bind(&done);
return object;
5949}

5951void WasmGraphBuilder::BrOnFunc(Node* object, Node* /*rtt*/,
                              ObjectReferenceKnowledge config,
                              Node** match_control, Node** match_effect,
                              Node** no_match_control,
                              Node** no_match_effect) {
BrOnCastAbs(match_control, match_effect, no_match_control, no_match_effect,
            [=](Callbacks callbacks) -> void {
              return ManagedObjectInstanceCheck(
                  object, config.object_can_be_null,
                  WASM_INTERNAL_FUNCTION_TYPE, callbacks);
            });
5962}

5964Node* WasmGraphBuilder::RefIsArray(Node* object, bool object_can_be_null) {
auto done = gasm_->MakeLabel(MachineRepresentation::kWord32);
ManagedObjectInstanceCheck(object, object_can_be_null, WASM_ARRAY_TYPE,
                           TestCallbacks(&done));
gasm_->Goto(&done, Int32Constant(1));
gasm_->Bind(&done);
return done.PhiAt(0);
5971}

5973Node* WasmGraphBuilder::RefAsArray(Node* object, bool object_can_be_null,
                                 wasm::WasmCodePosition position) {
auto done = gasm_->MakeLabel();
ManagedObjectInstanceCheck(object, object_can_be_null, WASM_ARRAY_TYPE,
                           CastCallbacks(&done, position));
gasm_->Goto(&done);
gasm_->Bind(&done);
return object;
5981}

5983void WasmGraphBuilder::BrOnArray(Node* object, Node* /*rtt*/,
                               ObjectReferenceKnowledge config,
                               Node** match_control, Node** match_effect,
                               Node** no_match_control,
                               Node** no_match_effect) {
BrOnCastAbs(match_control, match_effect, no_match_control, no_match_effect,
            [=](Callbacks callbacks) -> void {
              return ManagedObjectInstanceCheck(object,
                                                config.object_can_be_null,
                                                WASM_ARRAY_TYPE, callbacks);
            });
5994}

5996Node* WasmGraphBuilder::RefIsI31(Node* object) { return gasm_->IsI31(object); }

5998Node* WasmGraphBuilder::RefAsI31(Node* object,
                               wasm::WasmCodePosition position) {
TrapIfFalse(wasm::kTrapIllegalCast, gasm_->IsI31(object), position);
return object;
6002}

6004void WasmGraphBuilder::BrOnI31(Node* object, Node* /* rtt */,
                             ObjectReferenceKnowledge /* config */,
                             Node** match_control, Node** match_effect,
                             Node** no_match_control,
                             Node** no_match_effect) {
gasm_->Branch(gasm_->IsI31(object), match_control, no_match_control,
              BranchHint::kTrue);

SetControl(*no_match_control);
*match_effect = effect();
*no_match_effect = effect();
6015}

6017Node* WasmGraphBuilder::StructGet(Node* struct_object,
                                const wasm::StructType* struct_type,
                                uint32_t field_index, CheckForNull null_check,
                                bool is_signed,
                                wasm::WasmCodePosition position) {
if (null_check == kWithNullCheck) {
  TrapIfTrue(wasm::kTrapNullDereference, IsNull(struct_object), position);
}
// It is not enough to invoke ValueType::machine_type(), because the
// signedness has to be determined by {is_signed}.
MachineType machine_type = MachineType::TypeForRepresentation(
    struct_type->field(field_index).machine_representation(), is_signed);
Node* offset = gasm_->FieldOffset(struct_type, field_index);
return struct_type->mutability(field_index)
           ? gasm_->LoadFromObject(machine_type, struct_object, offset)
           : gasm_->LoadImmutableFromObject(machine_type, struct_object,
                                            offset);
6034}

6036void WasmGraphBuilder::StructSet(Node* struct_object,
                               const wasm::StructType* struct_type,
                               uint32_t field_index, Node* field_value,
                               CheckForNull null_check,
                               wasm::WasmCodePosition position) {
if (null_check == kWithNullCheck) {
  TrapIfTrue(wasm::kTrapNullDereference, IsNull(struct_object), position);
}
gasm_->StoreStructField(struct_object, struct_type, field_index, field_value);
6045}

6047void WasmGraphBuilder::BoundsCheckArray(Node* array, Node* index,
                                      wasm::WasmCodePosition position) {
if (V8_UNLIKELY(FLAG_experimental_wasm_skip_bounds_checks)(__builtin_expect(!!(FLAG_experimental_wasm_skip_bounds_checks
), 0))) return;
Node* length = gasm_->LoadWasmArrayLength(array);
TrapIfFalse(wasm::kTrapArrayOutOfBounds, gasm_->Uint32LessThan(index, length),
            position);
6053}

6055void WasmGraphBuilder::BoundsCheckArrayCopy(Node* array, Node* index,
                                          Node* length,
                                          wasm::WasmCodePosition position) {
if (V8_UNLIKELY(FLAG_experimental_wasm_skip_bounds_checks)(__builtin_expect(!!(FLAG_experimental_wasm_skip_bounds_checks
), 0))) return;
Node* array_length = gasm_->LoadWasmArrayLength(array);
Node* range_end = gasm_->Int32Add(index, length);
Node* range_valid = gasm_->Word32And(
    gasm_->Uint32LessThanOrEqual(range_end, array_length),
    gasm_->Uint32LessThanOrEqual(index, range_end));  // No overflow
TrapIfFalse(wasm::kTrapArrayOutOfBounds, range_valid, position);
6065}

6067Node* WasmGraphBuilder::ArrayGet(Node* array_object,
                               const wasm::ArrayType* type, Node* index,
                               CheckForNull null_check, bool is_signed,
                               wasm::WasmCodePosition position) {
if (null_check == kWithNullCheck) {
  TrapIfTrue(wasm::kTrapNullDereference, IsNull(array_object), position);
}
BoundsCheckArray(array_object, index, position);
MachineType machine_type = MachineType::TypeForRepresentation(
    type->element_type().machine_representation(), is_signed);
Node* offset = gasm_->WasmArrayElementOffset(index, type->element_type());
return type->mutability()
           ? gasm_->LoadFromObject(machine_type, array_object, offset)
           : gasm_->LoadImmutableFromObject(machine_type, array_object,
                                            offset);
6082}

6084void WasmGraphBuilder::ArraySet(Node* array_object, const wasm::ArrayType* type,
                              Node* index, Node* value,
                              CheckForNull null_check,
                              wasm::WasmCodePosition position) {
if (null_check == kWithNullCheck) {
  TrapIfTrue(wasm::kTrapNullDereference, IsNull(array_object), position);
}
BoundsCheckArray(array_object, index, position);
Node* offset = gasm_->WasmArrayElementOffset(index, type->element_type());
gasm_->StoreToObject(ObjectAccessForGCStores(type->element_type()),
                     array_object, offset, value);
6095}

6097Node* WasmGraphBuilder::ArrayLen(Node* array_object, CheckForNull null_check,
                               wasm::WasmCodePosition position) {
if (null_check == kWithNullCheck) {
  TrapIfTrue(wasm::kTrapNullDereference, IsNull(array_object), position);
}
return gasm_->LoadWasmArrayLength(array_object);
6103}

6105// TODO(7748): Add an option to copy in a loop for small array sizes. To find
6106// the length limit, run test/mjsunit/wasm/array-copy-benchmark.js.
6107void WasmGraphBuilder::ArrayCopy(Node* dst_array, Node* dst_index,
                               CheckForNull dst_null_check, Node* src_array,
                               Node* src_index, CheckForNull src_null_check,
                               Node* length,
                               wasm::WasmCodePosition position) {
if (dst_null_check == kWithNullCheck) {
  TrapIfTrue(wasm::kTrapNullDereference, IsNull(dst_array), position);
}
if (src_null_check == kWithNullCheck) {
  TrapIfTrue(wasm::kTrapNullDereference, IsNull(src_array), position);
}
BoundsCheckArrayCopy(dst_array, dst_index, length, position);
BoundsCheckArrayCopy(src_array, src_index, length, position);

auto skip = gasm_->MakeLabel();

gasm_->GotoIf(gasm_->Word32Equal(length, Int32Constant(0)), &skip,
              BranchHint::kFalse);

Node* function =
    gasm_->ExternalConstant(ExternalReference::wasm_array_copy());
MachineType arg_types[]{
    MachineType::TaggedPointer(), MachineType::TaggedPointer(),
    MachineType::Uint32(),        MachineType::TaggedPointer(),
    MachineType::Uint32(),        MachineType::Uint32()};
MachineSignature sig(0, 6, arg_types);
BuildCCall(&sig, function, GetInstance(), dst_array, dst_index, src_array,
           src_index, length);
gasm_->Goto(&skip);
gasm_->Bind(&skip);
6137}

6139// 1 bit V8 Smi tag, 31 bits V8 Smi shift, 1 bit i31ref high-bit truncation.
6140constexpr int kI31To32BitSmiShift = 33;

6142Node* WasmGraphBuilder::I31New(Node* input) {
if (SmiValuesAre31Bits()) {
  return gasm_->Word32Shl(input, BuildSmiShiftBitsConstant32());
}
DCHECK(SmiValuesAre32Bits())((void) 0);
input = BuildChangeInt32ToIntPtr(input);
return gasm_->WordShl(input, gasm_->IntPtrConstant(kI31To32BitSmiShift));
6149}

6151Node* WasmGraphBuilder::I31GetS(Node* input) {
if (SmiValuesAre31Bits()) {
  input = BuildTruncateIntPtrToInt32(input);
  return gasm_->Word32SarShiftOutZeros(input, BuildSmiShiftBitsConstant32());
}
DCHECK(SmiValuesAre32Bits())((void) 0);
return BuildTruncateIntPtrToInt32(
    gasm_->WordSar(input, gasm_->IntPtrConstant(kI31To32BitSmiShift)));
6159}

6161Node* WasmGraphBuilder::I31GetU(Node* input) {
if (SmiValuesAre31Bits()) {
  input = BuildTruncateIntPtrToInt32(input);
  return gasm_->Word32Shr(input, BuildSmiShiftBitsConstant32());
}
DCHECK(SmiValuesAre32Bits())((void) 0);
return BuildTruncateIntPtrToInt32(
    gasm_->WordShr(input, gasm_->IntPtrConstant(kI31To32BitSmiShift)));
6169}

6171class WasmDecorator final : public GraphDecorator {
public:
explicit WasmDecorator(NodeOriginTable* origins, wasm::Decoder* decoder)
    : origins_(origins), decoder_(decoder) {}

void Decorate(Node* node) final {
  origins_->SetNodeOrigin(
      node, NodeOrigin("wasm graph creation", "n/a",
                       NodeOrigin::kWasmBytecode, decoder_->position()));
}

private:
compiler::NodeOriginTable* origins_;
wasm::Decoder* decoder_;
6185};

6187void WasmGraphBuilder::AddBytecodePositionDecorator(
  NodeOriginTable* node_origins, wasm::Decoder* decoder) {
DCHECK_NULL(decorator_)((void) 0);
decorator_ = graph()->zone()->New<WasmDecorator>(node_origins, decoder);
graph()->AddDecorator(decorator_);
6192}

6194void WasmGraphBuilder::RemoveBytecodePositionDecorator() {
DCHECK_NOT_NULL(decorator_)((void) 0);
graph()->RemoveDecorator(decorator_);
decorator_ = nullptr;
6198}

6200namespace {

6202// A non-null {isolate} signifies that the generated code is treated as being in
6203// a JS frame for functions like BuildIsolateRoot().
6204class WasmWrapperGraphBuilder : public WasmGraphBuilder {
public:
WasmWrapperGraphBuilder(Zone* zone, MachineGraph* mcgraph,
                        const wasm::FunctionSig* sig,
                        const wasm::WasmModule* module,
                        Parameter0Mode parameter_mode, Isolate* isolate,
                        compiler::SourcePositionTable* spt,
                        StubCallMode stub_mode, wasm::WasmFeatures features)
    : WasmGraphBuilder(nullptr, zone, mcgraph, sig, spt, parameter_mode,
                       isolate),
      module_(module),
      stub_mode_(stub_mode),
      enabled_features_(features) {}

CallDescriptor* GetI64ToBigIntCallDescriptor() {
  if (i64_to_bigint_descriptor_) return i64_to_bigint_descriptor_;

  i64_to_bigint_descriptor_ =
      GetBuiltinCallDescriptor(Builtin::kI64ToBigInt, zone_, stub_mode_);

  AddInt64LoweringReplacement(
      i64_to_bigint_descriptor_,
      GetBuiltinCallDescriptor(Builtin::kI32PairToBigInt, zone_, stub_mode_));
  return i64_to_bigint_descriptor_;
}

CallDescriptor* GetBigIntToI64CallDescriptor(bool needs_frame_state) {
  if (bigint_to_i64_descriptor_) return bigint_to_i64_descriptor_;

  bigint_to_i64_descriptor_ = GetBuiltinCallDescriptor(
      Builtin::kBigIntToI64, zone_, stub_mode_, needs_frame_state);

  AddInt64LoweringReplacement(
      bigint_to_i64_descriptor_,
      GetBuiltinCallDescriptor(Builtin::kBigIntToI32Pair, zone_, stub_mode_));
  return bigint_to_i64_descriptor_;
}

Node* GetTargetForBuiltinCall(wasm::WasmCode::RuntimeStubId wasm_stub,
                              Builtin builtin) {
  return (stub_mode_ == StubCallMode::kCallWasmRuntimeStub)
             ? mcgraph()->RelocatableIntPtrConstant(wasm_stub,
                                                    RelocInfo::WASM_STUB_CALL)
             : gasm_->GetBuiltinPointerTarget(builtin);
}

Node* BuildChangeInt32ToNumber(Node* value) {
  // We expect most integers at runtime to be Smis, so it is important for
  // wrapper performance that Smi conversion be inlined.
  if (SmiValuesAre32Bits()) {
    return BuildChangeInt32ToSmi(value);
  }
  DCHECK(SmiValuesAre31Bits())((void) 0);

  auto builtin = gasm_->MakeDeferredLabel();
  auto done = gasm_->MakeLabel(MachineRepresentation::kTagged);

  // Double value to test if value can be a Smi, and if so, to convert it.
  Node* add = gasm_->Int32AddWithOverflow(value, value);
  Node* ovf = gasm_->Projection(1, add);
  gasm_->GotoIf(ovf, &builtin);

  // If it didn't overflow, the result is {2 * value} as pointer-sized value.
  Node* smi_tagged = BuildChangeInt32ToIntPtr(gasm_->Projection(0, add));
  gasm_->Goto(&done, smi_tagged);

  // Otherwise, call builtin, to convert to a HeapNumber.
  gasm_->Bind(&builtin);
  CommonOperatorBuilder* common = mcgraph()->common();
  Node* target =
      GetTargetForBuiltinCall(wasm::WasmCode::kWasmInt32ToHeapNumber,
                              Builtin::kWasmInt32ToHeapNumber);
  if (!int32_to_heapnumber_operator_.is_set()) {
    auto call_descriptor = Linkage::GetStubCallDescriptor(
        mcgraph()->zone(), WasmInt32ToHeapNumberDescriptor(), 0,
        CallDescriptor::kNoFlags, Operator::kNoProperties, stub_mode_);
    int32_to_heapnumber_operator_.set(common->Call(call_descriptor));
  }
  Node* call =
      gasm_->Call(int32_to_heapnumber_operator_.get(), target, value);
  gasm_->Goto(&done, call);
  gasm_->Bind(&done);
  return done.PhiAt(0);
}

Node* BuildChangeTaggedToInt32(Node* value, Node* context,
                               Node* frame_state) {
  // We expect most integers at runtime to be Smis, so it is important for
  // wrapper performance that Smi conversion be inlined.
  auto builtin = gasm_->MakeDeferredLabel();
  auto done = gasm_->MakeLabel(MachineRepresentation::kWord32);

  gasm_->GotoIfNot(IsSmi(value), &builtin);

  // If Smi, convert to int32.
  Node* smi = BuildChangeSmiToInt32(value);
  gasm_->Goto(&done, smi);

  // Otherwise, call builtin which changes non-Smi to Int32.
  gasm_->Bind(&builtin);
  CommonOperatorBuilder* common = mcgraph()->common();
  Node* target =
      GetTargetForBuiltinCall(wasm::WasmCode::kWasmTaggedNonSmiToInt32,
                              Builtin::kWasmTaggedNonSmiToInt32);
  if (!tagged_non_smi_to_int32_operator_.is_set()) {
    auto call_descriptor = Linkage::GetStubCallDescriptor(
        mcgraph()->zone(), WasmTaggedNonSmiToInt32Descriptor(), 0,
        frame_state ? CallDescriptor::kNeedsFrameState
                    : CallDescriptor::kNoFlags,
        Operator::kNoProperties, stub_mode_);
    tagged_non_smi_to_int32_operator_.set(common->Call(call_descriptor));
  }
  Node* call = frame_state
                   ? gasm_->Call(tagged_non_smi_to_int32_operator_.get(),
                                 target, value, context, frame_state)
                   : gasm_->Call(tagged_non_smi_to_int32_operator_.get(),
                                 target, value, context);
  SetSourcePosition(call, 1);
  gasm_->Goto(&done, call);
  gasm_->Bind(&done);
  return done.PhiAt(0);
}

Node* BuildChangeFloat32ToNumber(Node* value) {
  CommonOperatorBuilder* common = mcgraph()->common();
  Node* target = GetTargetForBuiltinCall(wasm::WasmCode::kWasmFloat32ToNumber,
                                         Builtin::kWasmFloat32ToNumber);
  if (!float32_to_number_operator_.is_set()) {
    auto call_descriptor = Linkage::GetStubCallDescriptor(
        mcgraph()->zone(), WasmFloat32ToNumberDescriptor(), 0,
        CallDescriptor::kNoFlags, Operator::kNoProperties, stub_mode_);
    float32_to_number_operator_.set(common->Call(call_descriptor));
  }
  return gasm_->Call(float32_to_number_operator_.get(), target, value);
}

Node* BuildChangeFloat64ToNumber(Node* value) {
  CommonOperatorBuilder* common = mcgraph()->common();
  Node* target = GetTargetForBuiltinCall(wasm::WasmCode::kWasmFloat64ToNumber,
                                         Builtin::kWasmFloat64ToNumber);
  if (!float64_to_number_operator_.is_set()) {
    auto call_descriptor = Linkage::GetStubCallDescriptor(
        mcgraph()->zone(), WasmFloat64ToNumberDescriptor(), 0,
        CallDescriptor::kNoFlags, Operator::kNoProperties, stub_mode_);
    float64_to_number_operator_.set(common->Call(call_descriptor));
  }
  return gasm_->Call(float64_to_number_operator_.get(), target, value);
}

Node* BuildChangeTaggedToFloat64(Node* value, Node* context,
                                 Node* frame_state) {
  CommonOperatorBuilder* common = mcgraph()->common();
  Node* target = GetTargetForBuiltinCall(wasm::WasmCode::kWasmTaggedToFloat64,
                                         Builtin::kWasmTaggedToFloat64);
  bool needs_frame_state = frame_state != nullptr;
  if (!tagged_to_float64_operator_.is_set()) {
    auto call_descriptor = Linkage::GetStubCallDescriptor(
        mcgraph()->zone(), WasmTaggedToFloat64Descriptor(), 0,
        frame_state ? CallDescriptor::kNeedsFrameState
                    : CallDescriptor::kNoFlags,
        Operator::kNoProperties, stub_mode_);
    tagged_to_float64_operator_.set(common->Call(call_descriptor));
  }
  Node* call = needs_frame_state
                   ? gasm_->Call(tagged_to_float64_operator_.get(), target,
                                 value, context, frame_state)
                   : gasm_->Call(tagged_to_float64_operator_.get(), target,
                                 value, context);
  SetSourcePosition(call, 1);
  return call;
}

int AddArgumentNodes(base::Vector<Node*> args, int pos, int param_count,
                     const wasm::FunctionSig* sig, Node* context) {
  // Convert wasm numbers to JS values.
  for (int i = 0; i < param_count; ++i) {
    Node* param =
        Param(i + 1);  // Start from index 1 to drop the instance_node.
    args[pos++] = ToJS(param, sig->GetParam(i), context);
  }
  return pos;
}

Node* ToJS(Node* node, wasm::ValueType type, Node* context) {
  switch (type.kind()) {
    case wasm::kI32:
      return BuildChangeInt32ToNumber(node);
    case wasm::kI64:
      return BuildChangeInt64ToBigInt(node);
    case wasm::kF32:
      return BuildChangeFloat32ToNumber(node);
    case wasm::kF64:
      return BuildChangeFloat64ToNumber(node);
    case wasm::kRef:
    case wasm::kOptRef:
      switch (type.heap_representation()) {
        case wasm::HeapType::kFunc: {
          if (type.kind() == wasm::kOptRef) {
            auto done =
                gasm_->MakeLabel(MachineRepresentation::kTaggedPointer);
            // Do not wrap {null}.
            gasm_->GotoIf(IsNull(node), &done, node);
            gasm_->Goto(&done,
                        gasm_->LoadFromObject(
                            MachineType::TaggedPointer(), node,
                            wasm::ObjectAccess::ToTagged(
                                WasmInternalFunction::kExternalOffset)));
            gasm_->Bind(&done);
            return done.PhiAt(0);
          } else {
            return gasm_->LoadFromObject(
                MachineType::TaggedPointer(), node,
                wasm::ObjectAccess::ToTagged(
                    WasmInternalFunction::kExternalOffset));
          }
        }
        case wasm::HeapType::kEq:
        case wasm::HeapType::kData:
        case wasm::HeapType::kArray:
        case wasm::HeapType::kI31:
          // TODO(7748): Update this when JS interop is settled.
          if (type.kind() == wasm::kOptRef) {
            auto done =
                gasm_->MakeLabel(MachineRepresentation::kTaggedPointer);
            // Do not wrap {null}.
            gasm_->GotoIf(IsNull(node), &done, node);
            gasm_->Goto(&done, BuildAllocateObjectWrapper(node, context));
            gasm_->Bind(&done);
            return done.PhiAt(0);
          } else {
            return BuildAllocateObjectWrapper(node, context);
          }
        case wasm::HeapType::kAny: {
          if (!enabled_features_.has_gc()) return node;
          // Wrap {node} in object wrapper if it is an array/struct.
          // Extract external function if this is a WasmInternalFunction.
          // Otherwise (i.e. null and external refs), return input.
          // Treat i31 as externref because they are indistinguishable from
          // Smis.
          // TODO(7748): Update this when JS interop is settled.
          auto wrap = gasm_->MakeLabel();
          auto function = gasm_->MakeLabel();
          auto done = gasm_->MakeLabel(MachineRepresentation::kTaggedPointer);
          gasm_->GotoIf(IsSmi(node), &done, node);
          gasm_->GotoIf(gasm_->IsDataRefMap(gasm_->LoadMap(node)), &wrap);
          gasm_->GotoIf(
              gasm_->HasInstanceType(node, WASM_INTERNAL_FUNCTION_TYPE),
              &function);
          // This includes the case where {node == null}.
          gasm_->Goto(&done, node);

          gasm_->Bind(&wrap);
          gasm_->Goto(&done, BuildAllocateObjectWrapper(node, context));

          gasm_->Bind(&function);
          gasm_->Goto(&done, gasm_->LoadFromObject(
                                 MachineType::TaggedPointer(), node,
                                 wasm::ObjectAccess::ToTagged(
                                     WasmInternalFunction::kExternalOffset)));

          gasm_->Bind(&done);
          return done.PhiAt(0);
        }
        default:
          DCHECK(type.has_index())((void) 0);
          if (module_->has_signature(type.ref_index())) {
            // Typed function. Extract the external function.
            return gasm_->LoadFromObject(
                MachineType::TaggedPointer(), node,
                wasm::ObjectAccess::ToTagged(
                    WasmInternalFunction::kExternalOffset));
          }
          // If this is reached, then IsJSCompatibleSignature() is too
          // permissive.
          // TODO(7748): Figure out a JS interop story for arrays and structs.
          UNREACHABLE()V8_Fatal("unreachable code");
      }
    case wasm::kRtt:
    case wasm::kI8:
    case wasm::kI16:
    case wasm::kS128:
    case wasm::kVoid:
    case wasm::kBottom:
      // If this is reached, then IsJSCompatibleSignature() is too permissive.
      // TODO(7748): Figure out what to do for RTTs.
      UNREACHABLE()V8_Fatal("unreachable code");
  }
}

// TODO(7748): Temporary solution to allow round-tripping of Wasm objects
// through JavaScript, where they show up as opaque boxes. This will disappear
// once we have a proper WasmGC <-> JS interaction story.
Node* BuildAllocateObjectWrapper(Node* input, Node* context) {
  if (FLAG_wasm_gc_js_interop) return input;
  return gasm_->CallBuiltin(Builtin::kWasmAllocateObjectWrapper,
                            Operator::kEliminatable, input, context);
}

// Assumes {input} has been checked for validity against the target wasm type.
// If {input} is a function, returns the WasmInternalFunction associated with
// it. If {input} has the {wasm_wrapped_object_symbol} property, returns the
// value of that property. Otherwise, returns {input}.
Node* BuildUnpackObjectWrapper(Node* input, Node* context) {
  auto not_a_function = gasm_->MakeLabel();
  auto end = gasm_->MakeLabel(MachineRepresentation::kTaggedPointer);

  gasm_->GotoIfNot(gasm_->HasInstanceType(input, JS_FUNCTION_TYPE),
                   &not_a_function);

  Node* function_data = gasm_->LoadFunctionDataFromJSFunction(input);

  // Due to type checking, {function_data} will be a WasmFunctionData.
  Node* internal = gasm_->LoadFromObject(
      MachineType::TaggedPointer(), function_data,
      wasm::ObjectAccess::ToTagged(WasmFunctionData::kInternalOffset));
  gasm_->Goto(&end, internal);

  gasm_->Bind(&not_a_function);
  if (!FLAG_wasm_gc_js_interop) {
    Node* obj = gasm_->CallBuiltin(
        Builtin::kWasmGetOwnProperty, Operator::kEliminatable, input,
        LOAD_ROOT(wasm_wrapped_object_symbol, wasm_wrapped_object_symbol),
        context);
    // Invalid object wrappers (i.e. any other JS object that doesn't have the
    // magic hidden property) will return {undefined}. Map that to {input}.
    Node* is_undefined = gasm_->TaggedEqual(obj, UndefinedValue());
    gasm_->GotoIf(is_undefined, &end, input);

    gasm_->Goto(&end, obj);
  } else {
    gasm_->Goto(&end, input);
  }

  gasm_->Bind(&end);

  return end.PhiAt(0);
}

Node* BuildChangeInt64ToBigInt(Node* input) {
  Node* target;
  if (mcgraph()->machine()->Is64()) {
    target = GetTargetForBuiltinCall(wasm::WasmCode::kI64ToBigInt,
                                     Builtin::kI64ToBigInt);
  } else {
    DCHECK(mcgraph()->machine()->Is32())((void) 0);
    // On 32-bit platforms we already set the target to the
    // I32PairToBigInt builtin here, so that we don't have to replace the
    // target in the int64-lowering.
    target = GetTargetForBuiltinCall(wasm::WasmCode::kI32PairToBigInt,
                                     Builtin::kI32PairToBigInt);
  }
  return gasm_->Call(GetI64ToBigIntCallDescriptor(), target, input);
}

Node* BuildChangeBigIntToInt64(Node* input, Node* context,
                               Node* frame_state) {
  Node* target;
  if (mcgraph()->machine()->Is64()) {
    target = GetTargetForBuiltinCall(wasm::WasmCode::kBigIntToI64,
                                     Builtin::kBigIntToI64);
  } else {
    DCHECK(mcgraph()->machine()->Is32())((void) 0);
    // On 32-bit platforms we already set the target to the
    // BigIntToI32Pair builtin here, so that we don't have to replace the
    // target in the int64-lowering.
    target = GetTargetForBuiltinCall(wasm::WasmCode::kBigIntToI32Pair,
                                     Builtin::kBigIntToI32Pair);
  }

  return frame_state ? gasm_->Call(GetBigIntToI64CallDescriptor(true), target,
                                   input, context, frame_state)
                     : gasm_->Call(GetBigIntToI64CallDescriptor(false),
                                   target, input, context);
}

void BuildCheckValidRefValue(Node* input, Node* js_context,
                             wasm::ValueType type) {
  // Make sure ValueType fits in a Smi.
  STATIC_ASSERT(wasm::ValueType::kLastUsedBit + 1 <= kSmiValueSize)static_assert(wasm::ValueType::kLastUsedBit + 1 <= kSmiValueSize
, "wasm::ValueType::kLastUsedBit + 1 <= kSmiValueSize");
  // The instance node is always defined: if an instance is not available, it
  // is the undefined value.
  Node* inputs[] = {GetInstance(), input,
                    mcgraph()->IntPtrConstant(
                        IntToSmi(static_cast<int>(type.raw_bit_field())))};

  Node* check = BuildChangeSmiToInt32(BuildCallToRuntimeWithContext(
      Runtime::kWasmIsValidRefValue, js_context, inputs, 3));

  Diamond type_check(graph(), mcgraph()->common(), check, BranchHint::kTrue);
  type_check.Chain(control());
  SetControl(type_check.if_false);

  Node* old_effect = effect();
  BuildCallToRuntimeWithContext(Runtime::kWasmThrowJSTypeError, js_context,
                                nullptr, 0);

  SetEffectControl(type_check.EffectPhi(old_effect, effect()),
                   type_check.merge);
}

Node* FromJS(Node* input, Node* js_context, wasm::ValueType type,
             Node* frame_state = nullptr) {
  switch (type.kind()) {
    case wasm::kRef:
    case wasm::kOptRef: {
      switch (type.heap_representation()) {
        case wasm::HeapType::kAny:
          if (!enabled_features_.has_gc()) return input;
          // If this is a wrapper for arrays/structs/i31s, unpack it.
          // TODO(7748): Update this when JS interop has settled.
          return BuildUnpackObjectWrapper(input, js_context);
        case wasm::HeapType::kFunc:
          BuildCheckValidRefValue(input, js_context, type);
          return BuildUnpackObjectWrapper(input, js_context);
        case wasm::HeapType::kData:
        case wasm::HeapType::kArray:
        case wasm::HeapType::kEq:
        case wasm::HeapType::kI31:
          // TODO(7748): Update this when JS interop has settled.
          BuildCheckValidRefValue(input, js_context, type);
          // This will just return {input} if the object is not wrapped, i.e.
          // if it is null (given the check just above).
          return BuildUnpackObjectWrapper(input, js_context);
        default:
          if (module_->has_signature(type.ref_index())) {
            BuildCheckValidRefValue(input, js_context, type);
            return BuildUnpackObjectWrapper(input, js_context);
          }
          // If this is reached, then IsJSCompatibleSignature() is too
          // permissive.
          UNREACHABLE()V8_Fatal("unreachable code");
      }
    }
    case wasm::kF32:
      return gasm_->TruncateFloat64ToFloat32(
          BuildChangeTaggedToFloat64(input, js_context, frame_state));

    case wasm::kF64:
      return BuildChangeTaggedToFloat64(input, js_context, frame_state);

    case wasm::kI32:
      return BuildChangeTaggedToInt32(input, js_context, frame_state);

    case wasm::kI64:
      // i64 values can only come from BigInt.
      return BuildChangeBigIntToInt64(input, js_context, frame_state);

    case wasm::kRtt:
    case wasm::kS128:
    case wasm::kI8:
    case wasm::kI16:
    case wasm::kBottom:
    case wasm::kVoid:
      // If this is reached, then IsJSCompatibleSignature() is too permissive.
      // TODO(7748): Figure out what to do for RTTs.
      UNREACHABLE()V8_Fatal("unreachable code");
  }
}

Node* SmiToFloat32(Node* input) {
  return gasm_->RoundInt32ToFloat32(BuildChangeSmiToInt32(input));
}

Node* SmiToFloat64(Node* input) {
  return gasm_->ChangeInt32ToFloat64(BuildChangeSmiToInt32(input));
}

Node* HeapNumberToFloat64(Node* input) {
  return gasm_->LoadFromObject(
      MachineType::Float64(), input,
      wasm::ObjectAccess::ToTagged(HeapNumber::kValueOffset));
}

Node* FromJSFast(Node* input, wasm::ValueType type) {
  switch (type.kind()) {
    case wasm::kI32:
      return BuildChangeSmiToInt32(input);
    case wasm::kF32: {
      auto done = gasm_->MakeLabel(MachineRepresentation::kFloat32);
      auto heap_number = gasm_->MakeLabel();
      gasm_->GotoIfNot(IsSmi(input), &heap_number);
      gasm_->Goto(&done, SmiToFloat32(input));
      gasm_->Bind(&heap_number);
      Node* value =
          gasm_->TruncateFloat64ToFloat32(HeapNumberToFloat64(input));
      gasm_->Goto(&done, value);
      gasm_->Bind(&done);
      return done.PhiAt(0);
    }
    case wasm::kF64: {
      auto done = gasm_->MakeLabel(MachineRepresentation::kFloat64);
      auto heap_number = gasm_->MakeLabel();
      gasm_->GotoIfNot(IsSmi(input), &heap_number);
      gasm_->Goto(&done, SmiToFloat64(input));
      gasm_->Bind(&heap_number);
      gasm_->Goto(&done, HeapNumberToFloat64(input));
      gasm_->Bind(&done);
      return done.PhiAt(0);
    }
    case wasm::kRef:
    case wasm::kOptRef:
    case wasm::kI64:
    case wasm::kRtt:
    case wasm::kS128:
    case wasm::kI8:
    case wasm::kI16:
    case wasm::kBottom:
    case wasm::kVoid:
      UNREACHABLE()V8_Fatal("unreachable code");
  }
}

void BuildModifyThreadInWasmFlagHelper(Node* thread_in_wasm_flag_address,
                                       bool new_value) {
  if (FLAG_debug_code) {
    Node* flag_value = gasm_->LoadFromObject(MachineType::Pointer(),
                                             thread_in_wasm_flag_address, 0);
    Node* check =
        gasm_->Word32Equal(flag_value, Int32Constant(new_value ? 0 : 1));

    Diamond flag_check(graph(), mcgraph()->common(), check,
                       BranchHint::kTrue);
    flag_check.Chain(control());
    SetControl(flag_check.if_false);
    Node* message_id = gasm_->NumberConstant(static_cast<int32_t>(
        new_value ? AbortReason::kUnexpectedThreadInWasmSet
                  : AbortReason::kUnexpectedThreadInWasmUnset));

    Node* old_effect = effect();
    Node* call = BuildCallToRuntimeWithContext(
        Runtime::kAbort, NoContextConstant(), &message_id, 1);
    flag_check.merge->ReplaceInput(1, call);
    SetEffectControl(flag_check.EffectPhi(old_effect, effect()),
                     flag_check.merge);
  }

  gasm_->StoreToObject(ObjectAccess(MachineType::Int32(), kNoWriteBarrier),
                       thread_in_wasm_flag_address, 0,
                       Int32Constant(new_value ? 1 : 0));
}

void BuildModifyThreadInWasmFlag(bool new_value) {
  if (!trap_handler::IsTrapHandlerEnabled()) return;
  Node* isolate_root = BuildLoadIsolateRoot();

  Node* thread_in_wasm_flag_address =
      gasm_->LoadFromObject(MachineType::Pointer(), isolate_root,
                            Isolate::thread_in_wasm_flag_address_offset());

  BuildModifyThreadInWasmFlagHelper(thread_in_wasm_flag_address, new_value);
}

class ModifyThreadInWasmFlagScope {
 public:
  ModifyThreadInWasmFlagScope(
      WasmWrapperGraphBuilder* wasm_wrapper_graph_builder,
      WasmGraphAssembler* gasm)
      : wasm_wrapper_graph_builder_(wasm_wrapper_graph_builder) {
    if (!trap_handler::IsTrapHandlerEnabled()) return;
    Node* isolate_root = wasm_wrapper_graph_builder_->BuildLoadIsolateRoot();

    thread_in_wasm_flag_address_ =
        gasm->LoadFromObject(MachineType::Pointer(), isolate_root,
                             Isolate::thread_in_wasm_flag_address_offset());

    wasm_wrapper_graph_builder_->BuildModifyThreadInWasmFlagHelper(
        thread_in_wasm_flag_address_, true);
  }

  ~ModifyThreadInWasmFlagScope() {
    if (!trap_handler::IsTrapHandlerEnabled()) return;

    wasm_wrapper_graph_builder_->BuildModifyThreadInWasmFlagHelper(
        thread_in_wasm_flag_address_, false);
  }

 private:
  WasmWrapperGraphBuilder* wasm_wrapper_graph_builder_;
  Node* thread_in_wasm_flag_address_;
};

Node* BuildMultiReturnFixedArrayFromIterable(const wasm::FunctionSig* sig,
                                             Node* iterable, Node* context) {
  Node* length = BuildChangeUint31ToSmi(
      mcgraph()->Uint32Constant(static_cast<uint32_t>(sig->return_count())));
  return gasm_->CallBuiltin(Builtin::kIterableToFixedArrayForWasm,
                            Operator::kEliminatable, iterable, length,
                            context);
}

// Generate a call to the AllocateJSArray builtin.
Node* BuildCallAllocateJSArray(Node* array_length, Node* context) {
  // Since we don't check that args will fit in an array,
  // we make sure this is true based on statically known limits.
  STATIC_ASSERT(wasm::kV8MaxWasmFunctionReturns <=static_assert(wasm::kV8MaxWasmFunctionReturns <= JSArray::
kInitialMaxFastElementArray, "wasm::kV8MaxWasmFunctionReturns <= JSArray::kInitialMaxFastElementArray"
)
                JSArray::kInitialMaxFastElementArray)static_assert(wasm::kV8MaxWasmFunctionReturns <= JSArray::
kInitialMaxFastElementArray, "wasm::kV8MaxWasmFunctionReturns <= JSArray::kInitialMaxFastElementArray"
);
  return gasm_->CallBuiltin(Builtin::kWasmAllocateJSArray,
                            Operator::kEliminatable, array_length, context);
}

Node* BuildCallAndReturn(bool is_import, Node* js_context,
                         Node* function_data,
                         base::SmallVector<Node*, 16> args,
                         const JSWasmCallData* js_wasm_call_data,
                         Node* frame_state) {
  const int rets_count = static_cast<int>(sig_->return_count());
  base::SmallVector<Node*, 1> rets(rets_count);

  // Set the ThreadInWasm flag before we do the actual call.
  {
    ModifyThreadInWasmFlagScope modify_thread_in_wasm_flag_builder(
        this, gasm_.get());

    if (is_import) {
      // Call to an imported function.
      // Load function index from {WasmExportedFunctionData}.
      Node* function_index = BuildChangeSmiToInt32(
          gasm_->LoadExportedFunctionIndexAsSmi(function_data));
      BuildImportCall(sig_, base::VectorOf(args), base::VectorOf(rets),
                      wasm::kNoCodePosition, function_index, kCallContinues);
    } else {
      // Call to a wasm function defined in this module.
      // The (cached) call target is the jump table slot for that function.
      Node* internal = gasm_->LoadFromObject(
          MachineType::TaggedPointer(), function_data,
          wasm::ObjectAccess::ToTagged(WasmFunctionData::kInternalOffset));
      args[0] = BuildLoadExternalPointerFromObject(
          internal, WasmInternalFunction::kForeignAddressOffset);
      Node* instance_node = gasm_->LoadFromObject(
          MachineType::TaggedPointer(), internal,
          wasm::ObjectAccess::ToTagged(WasmInternalFunction::kRefOffset));
      BuildWasmCall(sig_, base::VectorOf(args), base::VectorOf(rets),
                    wasm::kNoCodePosition, instance_node, frame_state);
    }
  }

  Node* jsval;
  if (sig_->return_count() == 0) {
    jsval = UndefinedValue();
  } else if (sig_->return_count() == 1) {
    jsval = js_wasm_call_data && !js_wasm_call_data->result_needs_conversion()
                ? rets[0]
                : ToJS(rets[0], sig_->GetReturn(), js_context);
  } else {
    int32_t return_count = static_cast<int32_t>(sig_->return_count());
    Node* size = gasm_->NumberConstant(return_count);

    jsval = BuildCallAllocateJSArray(size, js_context);

    Node* fixed_array = gasm_->LoadJSArrayElements(jsval);

    for (int i = 0; i < return_count; ++i) {
      Node* value = ToJS(rets[i], sig_->GetReturn(i), js_context);
      gasm_->StoreFixedArrayElementAny(fixed_array, i, value);
    }
  }
  return jsval;
}

bool QualifiesForFastTransform(const wasm::FunctionSig*) {
  const int wasm_count = static_cast<int>(sig_->parameter_count());
  for (int i = 0; i < wasm_count; ++i) {
    wasm::ValueType type = sig_->GetParam(i);
    switch (type.kind()) {
      case wasm::kRef:
      case wasm::kOptRef:
      case wasm::kI64:
      case wasm::kRtt:
      case wasm::kS128:
      case wasm::kI8:
      case wasm::kI16:
      case wasm::kBottom:
      case wasm::kVoid:
        return false;
      case wasm::kI32:
      case wasm::kF32:
      case wasm::kF64:
        break;
    }
  }
  return true;
}

Node* IsSmi(Node* input) {
  return gasm_->Word32Equal(
      gasm_->Word32And(BuildTruncateIntPtrToInt32(input),
                       Int32Constant(kSmiTagMask)),
      Int32Constant(kSmiTag));
}

void CanTransformFast(
    Node* input, wasm::ValueType type,
    v8::internal::compiler::GraphAssemblerLabel<0>* slow_path) {
  switch (type.kind()) {
    case wasm::kI32: {
      gasm_->GotoIfNot(IsSmi(input), slow_path);
      return;
    }
    case wasm::kF32:
    case wasm::kF64: {
      auto done = gasm_->MakeLabel();
      gasm_->GotoIf(IsSmi(input), &done);
      Node* map = gasm_->LoadMap(input);
      Node* heap_number_map = LOAD_ROOT(HeapNumberMap, heap_number_map);
6908#if V8_MAP_PACKING
      Node* is_heap_number = gasm_->WordEqual(heap_number_map, map);
6910#else
      Node* is_heap_number = gasm_->TaggedEqual(heap_number_map, map);
6912#endif
      gasm_->GotoIf(is_heap_number, &done);
      gasm_->Goto(slow_path);
      gasm_->Bind(&done);
      return;
    }
    case wasm::kRef:
    case wasm::kOptRef:
    case wasm::kI64:
    case wasm::kRtt:
    case wasm::kS128:
    case wasm::kI8:
    case wasm::kI16:
    case wasm::kBottom:
    case wasm::kVoid:
      UNREACHABLE()V8_Fatal("unreachable code");
  }
}

void BuildJSToWasmWrapper(bool is_import,
                          const JSWasmCallData* js_wasm_call_data = nullptr,
                          Node* frame_state = nullptr) {
  const int wasm_param_count = static_cast<int>(sig_->parameter_count());

  // Build the start and the JS parameter nodes.
  Start(wasm_param_count + 5);

  // Create the js_closure and js_context parameters.
  Node* js_closure = Param(Linkage::kJSCallClosureParamIndex, "%closure");
  Node* js_context = Param(
      Linkage::GetJSCallContextParamIndex(wasm_param_count + 1), "%context");
  Node* function_data = gasm_->LoadFunctionDataFromJSFunction(js_closure);

  if (!wasm::IsJSCompatibleSignature(sig_, module_, enabled_features_)) {
    // Throw a TypeError. Use the js_context of the calling javascript
    // function (passed as a parameter), such that the generated code is
    // js_context independent.
    BuildCallToRuntimeWithContext(Runtime::kWasmThrowJSTypeError, js_context,
                                  nullptr, 0);
    TerminateThrow(effect(), control());
    return;
  }

  const int args_count = wasm_param_count + 1;  // +1 for wasm_code.

  // Check whether the signature of the function allows for a fast
  // transformation (if any params exist that need transformation).
  // Create a fast transformation path, only if it does.
  bool include_fast_path = !js_wasm_call_data && wasm_param_count > 0 &&
                           QualifiesForFastTransform(sig_);

  // Prepare Param() nodes. Param() nodes can only be created once,
  // so we need to use the same nodes along all possible transformation paths.
  base::SmallVector<Node*, 16> params(args_count);
  for (int i = 0; i < wasm_param_count; ++i) params[i + 1] = Param(i + 1);

  auto done = gasm_->MakeLabel(MachineRepresentation::kTagged);
  if (include_fast_path) {
    auto slow_path = gasm_->MakeDeferredLabel();
    // Check if the params received on runtime can be actually transformed
    // using the fast transformation. When a param that cannot be transformed
    // fast is encountered, skip checking the rest and fall back to the slow
    // path.
    for (int i = 0; i < wasm_param_count; ++i) {
      CanTransformFast(params[i + 1], sig_->GetParam(i), &slow_path);
    }
    // Convert JS parameters to wasm numbers using the fast transformation
    // and build the call.
    base::SmallVector<Node*, 16> args(args_count);
    for (int i = 0; i < wasm_param_count; ++i) {
      Node* wasm_param = FromJSFast(params[i + 1], sig_->GetParam(i));
      args[i + 1] = wasm_param;
    }
    Node* jsval = BuildCallAndReturn(is_import, js_context, function_data,
                                     args, js_wasm_call_data, frame_state);
    gasm_->Goto(&done, jsval);
    gasm_->Bind(&slow_path);
  }
  // Convert JS parameters to wasm numbers using the default transformation
  // and build the call.
  base::SmallVector<Node*, 16> args(args_count);
  for (int i = 0; i < wasm_param_count; ++i) {
    bool do_conversion =
        !js_wasm_call_data || js_wasm_call_data->arg_needs_conversion(i);
    if (do_conversion) {
      args[i + 1] =
          FromJS(params[i + 1], js_context, sig_->GetParam(i), frame_state);
    } else {
      Node* wasm_param = params[i + 1];

      // For Float32 parameters
      // we set UseInfo::CheckedNumberOrOddballAsFloat64 in
      // simplified-lowering and we need to add here a conversion from Float64
      // to Float32.
      if (sig_->GetParam(i).kind() == wasm::kF32) {
        wasm_param = gasm_->TruncateFloat64ToFloat32(wasm_param);
      }

      args[i + 1] = wasm_param;
    }
  }
  Node* jsval = BuildCallAndReturn(is_import, js_context, function_data, args,
                                   js_wasm_call_data, frame_state);
  // If both the default and a fast transformation paths are present,
  // get the return value based on the path used.
  if (include_fast_path) {
    gasm_->Goto(&done, jsval);
    gasm_->Bind(&done);
    Return(done.PhiAt(0));
  } else {
    Return(jsval);
  }
  if (ContainsInt64(sig_)) LowerInt64(kCalledFromJS);
}

Node* BuildReceiverNode(Node* callable_node, Node* native_context,
                        Node* undefined_node) {
  // Check function strict bit.
  Node* shared_function_info = gasm_->LoadSharedFunctionInfo(callable_node);
  Node* flags = gasm_->LoadFromObject(
      MachineType::Int32(), shared_function_info,
      wasm::ObjectAccess::FlagsOffsetInSharedFunctionInfo());
  Node* strict_check =
      Binop(wasm::kExprI32And, flags,
            Int32Constant(SharedFunctionInfo::IsNativeBit::kMask |
                          SharedFunctionInfo::IsStrictBit::kMask));

  // Load global receiver if sloppy else use undefined.
  Diamond strict_d(graph(), mcgraph()->common(), strict_check,
                   BranchHint::kNone);
  Node* old_effect = effect();
  SetControl(strict_d.if_false);
  Node* global_proxy = gasm_->LoadFixedArrayElementPtr(
      native_context, Context::GLOBAL_PROXY_INDEX);
  SetEffectControl(strict_d.EffectPhi(old_effect, global_proxy),
                   strict_d.merge);
  return strict_d.Phi(MachineRepresentation::kTagged, undefined_node,
                      global_proxy);
}

Node* BuildSuspend(Node* value, Node* api_function_ref,
                   MachineRepresentation rep) {
  // If value is a promise, suspend to the js-to-wasm prompt, and resume later
  // with the promise's resolved value.
  auto resume = gasm_->MakeLabel(rep);
  gasm_->GotoIf(IsSmi(value), &resume, value);
  gasm_->GotoIfNot(gasm_->HasInstanceType(value, JS_PROMISE_TYPE), &resume,
                   BranchHint::kTrue, value);
  Node* suspender = gasm_->Load(
      MachineType::TaggedPointer(), api_function_ref,
      wasm::ObjectAccess::ToTagged(WasmApiFunctionRef::kSuspenderOffset));
  Node* native_context = gasm_->Load(
      MachineType::TaggedPointer(), api_function_ref,
      wasm::ObjectAccess::ToTagged(WasmApiFunctionRef::kNativeContextOffset));
  auto* call_descriptor = GetBuiltinCallDescriptor(
      Builtin::kWasmSuspend, zone_, StubCallMode::kCallWasmRuntimeStub);
  Node* call_target = mcgraph()->RelocatableIntPtrConstant(
      wasm::WasmCode::kWasmSuspend, RelocInfo::WASM_STUB_CALL);
  Node* args[] = {value, suspender};
  Node* chained_promise = BuildCallToRuntimeWithContext(
      Runtime::kWasmCreateResumePromise, native_context, args, 2);
  Node* resolved =
      gasm_->Call(call_descriptor, call_target, chained_promise, suspender);
  gasm_->Goto(&resume, resolved);
  gasm_->Bind(&resume);
  return resume.PhiAt(0);
}

// For wasm-to-js wrappers, parameter 0 is a WasmApiFunctionRef.
bool BuildWasmToJSWrapper(WasmImportCallKind kind, int expected_arity,
                          wasm::Suspend suspend) {
  int wasm_count = static_cast<int>(sig_->parameter_count());

  // Build the start and the parameter nodes.
  Start(wasm_count + 3);

  Node* native_context = gasm_->Load(
      MachineType::TaggedPointer(), Param(0),
      wasm::ObjectAccess::ToTagged(WasmApiFunctionRef::kNativeContextOffset));

  if (kind == WasmImportCallKind::kRuntimeTypeError) {
    // =======================================================================
    // === Runtime TypeError =================================================
    // =======================================================================
    BuildCallToRuntimeWithContext(Runtime::kWasmThrowJSTypeError,
                                  native_context, nullptr, 0);
    TerminateThrow(effect(), control());
    return false;
  }

  Node* callable_node = gasm_->Load(
      MachineType::TaggedPointer(), Param(0),
      wasm::ObjectAccess::ToTagged(WasmApiFunctionRef::kCallableOffset));

  Node* undefined_node = UndefinedValue();

  Node* call = nullptr;

  // Clear the ThreadInWasm flag.
  BuildModifyThreadInWasmFlag(false);

  switch (kind) {
    // =======================================================================
    // === JS Functions with matching arity ==================================
    // =======================================================================
    case WasmImportCallKind::kJSFunctionArityMatch: {
      base::SmallVector<Node*, 16> args(wasm_count + 7);
      int pos = 0;
      Node* function_context =
          gasm_->LoadContextFromJSFunction(callable_node);
      args[pos++] = callable_node;  // target callable.

      // Determine receiver at runtime.
      args[pos++] =
          BuildReceiverNode(callable_node, native_context, undefined_node);

      auto call_descriptor = Linkage::GetJSCallDescriptor(
          graph()->zone(), false, wasm_count + 1, CallDescriptor::kNoFlags);

      // Convert wasm numbers to JS values.
      pos = AddArgumentNodes(base::VectorOf(args), pos, wasm_count, sig_,
                             native_context);

      args[pos++] = undefined_node;  // new target
      args[pos++] =
          Int32Constant(JSParameterCount(wasm_count));  // argument count
      args[pos++] = function_context;
      args[pos++] = effect();
      args[pos++] = control();

      DCHECK_EQ(pos, args.size())((void) 0);
      call = gasm_->Call(call_descriptor, pos, args.begin());
      if (suspend == wasm::kSuspend) {
        MachineRepresentation rep =
            sig_->return_count() >= 1
                ? sig_->GetReturn(0).machine_representation()
                : MachineRepresentation::kNone;
        call = BuildSuspend(call, Param(0), rep);
      }
      break;
    }
    // =======================================================================
    // === JS Functions with mismatching arity ===============================
    // =======================================================================
    case WasmImportCallKind::kJSFunctionArityMismatch: {
      int pushed_count = std::max(expected_arity, wasm_count);
      base::SmallVector<Node*, 16> args(pushed_count + 7);
      int pos = 0;

      args[pos++] = callable_node;  // target callable.
      // Determine receiver at runtime.
      args[pos++] =
          BuildReceiverNode(callable_node, native_context, undefined_node);

      // Convert wasm numbers to JS values.
      pos = AddArgumentNodes(base::VectorOf(args), pos, wasm_count, sig_,
                             native_context);
      for (int i = wasm_count; i < expected_arity; ++i) {
        args[pos++] = undefined_node;
      }
      args[pos++] = undefined_node;  // new target
      args[pos++] =
          Int32Constant(JSParameterCount(wasm_count));  // argument count

      Node* function_context =
          gasm_->LoadContextFromJSFunction(callable_node);
      args[pos++] = function_context;
      args[pos++] = effect();
      args[pos++] = control();
      DCHECK_EQ(pos, args.size())((void) 0);

      auto call_descriptor = Linkage::GetJSCallDescriptor(
          graph()->zone(), false, pushed_count + 1, CallDescriptor::kNoFlags);
      call = gasm_->Call(call_descriptor, pos, args.begin());
      // TODO(12191): Handle suspending wrapper.
      break;
    }
    // =======================================================================
    // === General case of unknown callable ==================================
    // =======================================================================
    case WasmImportCallKind::kUseCallBuiltin: {
      base::SmallVector<Node*, 16> args(wasm_count + 7);
      int pos = 0;
      args[pos++] =
          gasm_->GetBuiltinPointerTarget(Builtin::kCall_ReceiverIsAny);
      args[pos++] = callable_node;
      args[pos++] =
          Int32Constant(JSParameterCount(wasm_count));     // argument count
      args[pos++] = undefined_node;                        // receiver

      auto call_descriptor = Linkage::GetStubCallDescriptor(
          graph()->zone(), CallTrampolineDescriptor{}, wasm_count + 1,
          CallDescriptor::kNoFlags, Operator::kNoProperties,
          StubCallMode::kCallBuiltinPointer);

      // Convert wasm numbers to JS values.
      pos = AddArgumentNodes(base::VectorOf(args), pos, wasm_count, sig_,
                             native_context);

      // The native_context is sufficient here, because all kind of callables
      // which depend on the context provide their own context. The context
      // here is only needed if the target is a constructor to throw a
      // TypeError, if the target is a native function, or if the target is a
      // callable JSObject, which can only be constructed by the runtime.
      args[pos++] = native_context;
      args[pos++] = effect();
      args[pos++] = control();

      DCHECK_EQ(pos, args.size())((void) 0);
      call = gasm_->Call(call_descriptor, pos, args.begin());
      // TODO(12191): Handle suspending wrapper.
      break;
    }
    default:
      UNREACHABLE()V8_Fatal("unreachable code");
  }
  DCHECK_NOT_NULL(call)((void) 0);

  SetSourcePosition(call, 0);

  // Convert the return value(s) back.
  if (sig_->return_count() <= 1) {
    Node* val = sig_->return_count() == 0
                    ? Int32Constant(0)
                    : FromJS(call, native_context, sig_->GetReturn());
    BuildModifyThreadInWasmFlag(true);
    Return(val);
  } else {
    Node* fixed_array =
        BuildMultiReturnFixedArrayFromIterable(sig_, call, native_context);
    base::SmallVector<Node*, 8> wasm_values(sig_->return_count());
    for (unsigned i = 0; i < sig_->return_count(); ++i) {
      wasm_values[i] = FromJS(gasm_->LoadFixedArrayElementAny(fixed_array, i),
                              native_context, sig_->GetReturn(i));
    }
    BuildModifyThreadInWasmFlag(true);
    Return(base::VectorOf(wasm_values));
  }

  if (ContainsInt64(sig_)) LowerInt64(kCalledFromWasm);
  return true;
}

void BuildCapiCallWrapper() {
  // Set up the graph start.
  Start(static_cast<int>(sig_->parameter_count()) +
        1 /* offset for first parameter index being -1 */ +
        1 /* WasmApiFunctionRef */);
  // Store arguments on our stack, then align the stack for calling to C.
  int param_bytes = 0;
  for (wasm::ValueType type : sig_->parameters()) {
    param_bytes += type.value_kind_size();
  }
  int return_bytes = 0;
  for (wasm::ValueType type : sig_->returns()) {
    return_bytes += type.value_kind_size();
  }

  int stack_slot_bytes = std::max(param_bytes, return_bytes);
  Node* values = stack_slot_bytes == 0
                     ? mcgraph()->IntPtrConstant(0)
                     : graph()->NewNode(mcgraph()->machine()->StackSlot(
                           stack_slot_bytes, kDoubleAlignment));

  int offset = 0;
  int param_count = static_cast<int>(sig_->parameter_count());
  for (int i = 0; i < param_count; ++i) {
    wasm::ValueType type = sig_->GetParam(i);
    // Start from the parameter with index 1 to drop the instance_node.
    // TODO(jkummerow): When a values is a reference type, we should pass it
    // in a GC-safe way, not just as a raw pointer.
    SetEffect(graph()->NewNode(GetSafeStoreOperator(offset, type), values,
                               Int32Constant(offset), Param(i + 1), effect(),
                               control()));
    offset += type.value_kind_size();
  }

  Node* function_node = gasm_->Load(
      MachineType::TaggedPointer(), Param(0),
      wasm::ObjectAccess::ToTagged(WasmApiFunctionRef::kCallableOffset));
  Node* sfi_data = gasm_->LoadFunctionDataFromJSFunction(function_node);
  Node* host_data_foreign =
      gasm_->Load(MachineType::AnyTagged(), sfi_data,
                  wasm::ObjectAccess::ToTagged(
                      WasmCapiFunctionData::kEmbedderDataOffset));

  BuildModifyThreadInWasmFlag(false);
  Node* isolate_root = BuildLoadIsolateRoot();
  Node* fp_value = graph()->NewNode(mcgraph()->machine()->LoadFramePointer());
  gasm_->Store(StoreRepresentation(MachineType::PointerRepresentation(),
                                   kNoWriteBarrier),
               isolate_root, Isolate::c_entry_fp_offset(), fp_value);

  Node* function = BuildLoadCallTargetFromExportedFunctionData(sfi_data);

  // Parameters: Address host_data_foreign, Address arguments.
  MachineType host_sig_types[] = {
      MachineType::Pointer(), MachineType::Pointer(), MachineType::Pointer()};
  MachineSignature host_sig(1, 2, host_sig_types);
  Node* return_value =
      BuildCCall(&host_sig, function, host_data_foreign, values);

  BuildModifyThreadInWasmFlag(true);

  Node* old_effect = effect();
  Node* exception_branch = graph()->NewNode(
      mcgraph()->common()->Branch(BranchHint::kTrue),
      gasm_->WordEqual(return_value, mcgraph()->IntPtrConstant(0)),
      control());
  SetControl(
      graph()->NewNode(mcgraph()->common()->IfFalse(), exception_branch));
  WasmRethrowExplicitContextDescriptor interface_descriptor;
  auto call_descriptor = Linkage::GetStubCallDescriptor(
      mcgraph()->zone(), interface_descriptor,
      interface_descriptor.GetStackParameterCount(), CallDescriptor::kNoFlags,
      Operator::kNoProperties, StubCallMode::kCallWasmRuntimeStub);
  Node* call_target = mcgraph()->RelocatableIntPtrConstant(
      wasm::WasmCode::kWasmRethrowExplicitContext, RelocInfo::WASM_STUB_CALL);
  Node* context = gasm_->Load(
      MachineType::TaggedPointer(), Param(0),
      wasm::ObjectAccess::ToTagged(WasmApiFunctionRef::kNativeContextOffset));
  gasm_->Call(call_descriptor, call_target, return_value, context);
  TerminateThrow(effect(), control());

  SetEffectControl(old_effect, graph()->NewNode(mcgraph()->common()->IfTrue(),
                                                exception_branch));
  DCHECK_LT(sig_->return_count(), wasm::kV8MaxWasmFunctionReturns)((void) 0);
  size_t return_count = sig_->return_count();
  if (return_count == 0) {
    Return(Int32Constant(0));
  } else {
    base::SmallVector<Node*, 8> returns(return_count);
    offset = 0;
    for (size_t i = 0; i < return_count; ++i) {
      wasm::ValueType type = sig_->GetReturn(i);
      Node* val = SetEffect(
          graph()->NewNode(GetSafeLoadOperator(offset, type), values,
                           Int32Constant(offset), effect(), control()));
      returns[i] = val;
      offset += type.value_kind_size();
    }
    Return(base::VectorOf(returns));
  }

  if (ContainsInt64(sig_)) LowerInt64(kCalledFromWasm);
}

void BuildJSFastApiCallWrapper(Handle<JSFunction> target) {
  // Here 'callable_node' must be equal to 'target' but we cannot pass a
  // HeapConstant(target) because WasmCode::Validate() fails with
  // Unexpected mode: FULL_EMBEDDED_OBJECT.
  Node* callable_node = gasm_->Load(
      MachineType::TaggedPointer(), Param(0),
      wasm::ObjectAccess::ToTagged(WasmApiFunctionRef::kCallableOffset));
  Node* native_context = gasm_->Load(
      MachineType::TaggedPointer(), Param(0),
      wasm::ObjectAccess::ToTagged(WasmApiFunctionRef::kNativeContextOffset));
  Node* undefined_node = UndefinedValue();
  Node* receiver_node =
      BuildReceiverNode(callable_node, native_context, undefined_node);

  SharedFunctionInfo shared = target->shared();
  FunctionTemplateInfo api_func_data = shared.get_api_func_data();
  const Address c_address = api_func_data.GetCFunction(0);
  const v8::CFunctionInfo* c_signature = api_func_data.GetCSignature(0);
  int c_arg_count = c_signature->ArgumentCount();

  BuildModifyThreadInWasmFlag(false);

7381#ifdef V8_USE_SIMULATOR_WITH_GENERIC_C_CALLS
  Address c_functions[] = {c_address};
  const v8::CFunctionInfo* const c_signatures[] = {c_signature};
  target->GetIsolate()->simulator_data()->RegisterFunctionsAndSignatures(
      c_functions, c_signatures, 1);
7386#endif  //  V8_USE_SIMULATOR_WITH_GENERIC_C_CALLS

  MachineSignature::Builder builder(graph()->zone(), 1, c_arg_count);
  builder.AddReturn(MachineType::TypeForCType(c_signature->ReturnInfo()));
  for (int i = 0; i < c_arg_count; i += 1) {
    builder.AddParam(MachineType::TypeForCType(c_signature->ArgumentInfo(i)));
  }

  base::SmallVector<Node*, 16> args(c_arg_count + 3);
  int pos = 0;

  args[pos++] = mcgraph()->ExternalConstant(
      ExternalReference::Create(c_address, ExternalReference::FAST_C_CALL));

  auto store_stack = [this](Node* node) -> Node* {
    constexpr int kAlign = alignof(uintptr_t);
    constexpr int kSize = sizeof(uintptr_t);
    Node* stack_slot = gasm_->StackSlot(kSize, kAlign);

    gasm_->Store(StoreRepresentation(MachineType::PointerRepresentation(),
                                     kNoWriteBarrier),
                 stack_slot, 0, node);
    return stack_slot;
  };

  // Set receiver.
  args[pos++] = store_stack(receiver_node);

  for (int i = 1; i < c_arg_count; i += 1) {
    switch (c_signature->ArgumentInfo(i).GetType()) {
      case CTypeInfo::Type::kV8Value:
        args[pos++] = store_stack(Param(i));
        break;
      default:
        args[pos++] = Param(i);
        break;
    }
  }
  DCHECK(!c_signature->HasOptions())((void) 0);
  args[pos++] = effect();
  args[pos++] = control();

  auto call_descriptor =
      Linkage::GetSimplifiedCDescriptor(graph()->zone(), builder.Build());

  // CPU profiler support.
  Node* target_address = gasm_->ExternalConstant(
      ExternalReference::fast_api_call_target_address(target->GetIsolate()));
  gasm_->Store(StoreRepresentation(MachineType::PointerRepresentation(),
                                   kNoWriteBarrier),
               target_address, 0, gasm_->IntPtrConstant(c_address));

  // Disable JS execution.
  Node* javascript_execution_assert = gasm_->ExternalConstant(
      ExternalReference::javascript_execution_assert(target->GetIsolate()));
  gasm_->Store(
      StoreRepresentation(MachineRepresentation::kWord8, kNoWriteBarrier),
      javascript_execution_assert, 0, gasm_->Int32Constant(0));

  // Execute the fast call API.
  Node* call = gasm_->Call(call_descriptor, pos, args.begin());

  // Reenable JS execution.
  gasm_->Store(
      StoreRepresentation(MachineRepresentation::kWord8, kNoWriteBarrier),
      javascript_execution_assert, 0, gasm_->Int32Constant(1));

  // Reset the CPU profiler target address.
  gasm_->Store(StoreRepresentation(MachineType::PointerRepresentation(),
                                   kNoWriteBarrier),
               target_address, 0, gasm_->IntPtrConstant(0));

  BuildModifyThreadInWasmFlag(true);

  Return(call);
}

void BuildJSToJSWrapper() {
  int wasm_count = static_cast<int>(sig_->parameter_count());

  // Build the start and the parameter nodes.
  int param_count = 1 /* closure */ + 1 /* receiver */ + wasm_count +
                    1 /* new.target */ + 1 /* #arg */ + 1 /* context */;
  Start(param_count);
  Node* closure = Param(Linkage::kJSCallClosureParamIndex);
  Node* context = Param(Linkage::GetJSCallContextParamIndex(wasm_count + 1));

  // Throw a TypeError if the signature is incompatible with JavaScript.
  if (!wasm::IsJSCompatibleSignature(sig_, module_, enabled_features_)) {
    BuildCallToRuntimeWithContext(Runtime::kWasmThrowJSTypeError, context,
                                  nullptr, 0);
    TerminateThrow(effect(), control());
    return;
  }

  // Load the original callable from the closure.
  Node* func_data = gasm_->LoadFunctionDataFromJSFunction(closure);
  Node* internal = gasm_->LoadFromObject(
      MachineType::AnyTagged(), func_data,
      wasm::ObjectAccess::ToTagged(WasmFunctionData::kInternalOffset));
  Node* ref = gasm_->LoadFromObject(
      MachineType::AnyTagged(), internal,
      wasm::ObjectAccess::ToTagged(WasmInternalFunction::kRefOffset));
  Node* callable = gasm_->LoadFromObject(
      MachineType::AnyTagged(), ref,
      wasm::ObjectAccess::ToTagged(WasmApiFunctionRef::kCallableOffset));

  // Call the underlying closure.
  base::SmallVector<Node*, 16> args(wasm_count + 7);
  int pos = 0;
  args[pos++] = gasm_->GetBuiltinPointerTarget(Builtin::kCall_ReceiverIsAny);
  args[pos++] = callable;
  args[pos++] =
      Int32Constant(JSParameterCount(wasm_count));  // argument count
  args[pos++] = UndefinedValue();                   // receiver

  auto call_descriptor = Linkage::GetStubCallDescriptor(
      graph()->zone(), CallTrampolineDescriptor{}, wasm_count + 1,
      CallDescriptor::kNoFlags, Operator::kNoProperties,
      StubCallMode::kCallBuiltinPointer);

  // Convert parameter JS values to wasm numbers and back to JS values.
  for (int i = 0; i < wasm_count; ++i) {
    Node* param = Param(i + 1);  // Start from index 1 to skip receiver.
    args[pos++] = ToJS(FromJS(param, context, sig_->GetParam(i)),
                       sig_->GetParam(i), context);
  }

  args[pos++] = context;
  args[pos++] = effect();
  args[pos++] = control();

  DCHECK_EQ(pos, args.size())((void) 0);
  Node* call = gasm_->Call(call_descriptor, pos, args.begin());

  // Convert return JS values to wasm numbers and back to JS values.
  Node* jsval;
  if (sig_->return_count() == 0) {
    jsval = UndefinedValue();
  } else if (sig_->return_count() == 1) {
    jsval = ToJS(FromJS(call, context, sig_->GetReturn()), sig_->GetReturn(),
                 context);
  } else {
    Node* fixed_array =
        BuildMultiReturnFixedArrayFromIterable(sig_, call, context);
    int32_t return_count = static_cast<int32_t>(sig_->return_count());
    Node* size = gasm_->NumberConstant(return_count);
    jsval = BuildCallAllocateJSArray(size, context);
    Node* result_fixed_array = gasm_->LoadJSArrayElements(jsval);
    for (unsigned i = 0; i < sig_->return_count(); ++i) {
      const auto& type = sig_->GetReturn(i);
      Node* elem = gasm_->LoadFixedArrayElementAny(fixed_array, i);
      Node* cast = ToJS(FromJS(elem, context, type), type, context);
      gasm_->StoreFixedArrayElementAny(result_fixed_array, i, cast);
    }
  }
  Return(jsval);
}

void BuildCWasmEntry() {
  // +1 offset for first parameter index being -1.
  Start(CWasmEntryParameters::kNumParameters + 1);

  Node* code_entry = Param(CWasmEntryParameters::kCodeEntry);
  Node* object_ref = Param(CWasmEntryParameters::kObjectRef);
  Node* arg_buffer = Param(CWasmEntryParameters::kArgumentsBuffer);
  Node* c_entry_fp = Param(CWasmEntryParameters::kCEntryFp);

  Node* fp_value = graph()->NewNode(mcgraph()->machine()->LoadFramePointer());
  gasm_->Store(StoreRepresentation(MachineType::PointerRepresentation(),
                                   kNoWriteBarrier),
               fp_value, TypedFrameConstants::kFirstPushedFrameValueOffset,
               c_entry_fp);

  int wasm_arg_count = static_cast<int>(sig_->parameter_count());
  base::SmallVector<Node*, 16> args(wasm_arg_count + 4);

  int pos = 0;
  args[pos++] = code_entry;
  args[pos++] = object_ref;

  int offset = 0;
  for (wasm::ValueType type : sig_->parameters()) {
    Node* arg_load = SetEffect(
        graph()->NewNode(GetSafeLoadOperator(offset, type), arg_buffer,
                         Int32Constant(offset), effect(), control()));
    args[pos++] = arg_load;
    offset += type.value_kind_size();
  }

  args[pos++] = effect();
  args[pos++] = control();

  // Call the wasm code.
  auto call_descriptor = GetWasmCallDescriptor(mcgraph()->zone(), sig_);

  DCHECK_EQ(pos, args.size())((void) 0);
  Node* call = gasm_->Call(call_descriptor, pos, args.begin());

  Node* if_success = graph()->NewNode(mcgraph()->common()->IfSuccess(), call);
  Node* if_exception =
      graph()->NewNode(mcgraph()->common()->IfException(), call, call);

  // Handle exception: return it.
  SetControl(if_exception);
  Return(if_exception);

  // Handle success: store the return value(s).
  SetControl(if_success);
  pos = 0;
  offset = 0;
  for (wasm::ValueType type : sig_->returns()) {
    Node* value = sig_->return_count() == 1
                      ? call
                      : graph()->NewNode(mcgraph()->common()->Projection(pos),
                                         call, control());
    SetEffect(graph()->NewNode(GetSafeStoreOperator(offset, type), arg_buffer,
                               Int32Constant(offset), value, effect(),
                               control()));
    offset += type.value_kind_size();
    pos++;
  }

  Return(mcgraph()->IntPtrConstant(0));

  if (mcgraph()->machine()->Is32() && ContainsInt64(sig_)) {
    // No special lowering should be requested in the C entry.
    DCHECK_NULL(lowering_special_case_)((void) 0);

    MachineRepresentation sig_reps[] = {
        MachineType::PointerRepresentation(),  // return value
        MachineType::PointerRepresentation(),  // target
        MachineRepresentation::kTagged,        // object_ref
        MachineType::PointerRepresentation(),  // argv
        MachineType::PointerRepresentation()   // c_entry_fp
    };
    Signature<MachineRepresentation> c_entry_sig(1, 4, sig_reps);
    Int64Lowering r(mcgraph()->graph(), mcgraph()->machine(),
                    mcgraph()->common(), gasm_->simplified(),
                    mcgraph()->zone(), &c_entry_sig);
    r.LowerGraph();
  }
}

private:
const wasm::WasmModule* module_;
StubCallMode stub_mode_;
SetOncePointer<const Operator> int32_to_heapnumber_operator_;
SetOncePointer<const Operator> tagged_non_smi_to_int32_operator_;
SetOncePointer<const Operator> float32_to_number_operator_;
SetOncePointer<const Operator> float64_to_number_operator_;
SetOncePointer<const Operator> tagged_to_float64_operator_;
wasm::WasmFeatures enabled_features_;
CallDescriptor* bigint_to_i64_descriptor_ = nullptr;
CallDescriptor* i64_to_bigint_descriptor_ = nullptr;
7641};

7643}  // namespace

7645void BuildInlinedJSToWasmWrapper(
  Zone* zone, MachineGraph* mcgraph, const wasm::FunctionSig* signature,
  const wasm::WasmModule* module, Isolate* isolate,
  compiler::SourcePositionTable* spt, StubCallMode stub_mode,
  wasm::WasmFeatures features, const JSWasmCallData* js_wasm_call_data,
  Node* frame_state) {
WasmWrapperGraphBuilder builder(zone, mcgraph, signature, module,
                                WasmGraphBuilder::kNoSpecialParameterMode,
                                isolate, spt, stub_mode, features);
builder.BuildJSToWasmWrapper(false, js_wasm_call_data, frame_state);
7655}

7657std::unique_ptr<TurbofanCompilationJob> NewJSToWasmCompilationJob(
  Isolate* isolate, const wasm::FunctionSig* sig,
  const wasm::WasmModule* module, bool is_import,
  const wasm::WasmFeatures& enabled_features) {
//----------------------------------------------------------------------------
// Create the Graph.
//----------------------------------------------------------------------------
std::unique_ptr<Zone> zone = std::make_unique<Zone>(
    wasm::GetWasmEngine()->allocator(), ZONE_NAME__func__, kCompressGraphZone);
Graph* graph = zone->New<Graph>(zone.get());
CommonOperatorBuilder* common = zone->New<CommonOperatorBuilder>(zone.get());
MachineOperatorBuilder* machine = zone->New<MachineOperatorBuilder>(
    zone.get(), MachineType::PointerRepresentation(),
    InstructionSelector::SupportedMachineOperatorFlags(),
    InstructionSelector::AlignmentRequirements());
MachineGraph* mcgraph = zone->New<MachineGraph>(graph, common, machine);

WasmWrapperGraphBuilder builder(
    zone.get(), mcgraph, sig, module,
    WasmGraphBuilder::kNoSpecialParameterMode, isolate, nullptr,
    StubCallMode::kCallBuiltinPointer, enabled_features);
builder.BuildJSToWasmWrapper(is_import);

//----------------------------------------------------------------------------
// Create the compilation job.
//----------------------------------------------------------------------------
std::unique_ptr<char[]> debug_name = WasmExportedFunction::GetDebugName(sig);

int params = static_cast<int>(sig->parameter_count());
CallDescriptor* incoming = Linkage::GetJSCallDescriptor(
    zone.get(), false, params + 1, CallDescriptor::kNoFlags);

return Pipeline::NewWasmHeapStubCompilationJob(
    isolate, incoming, std::move(zone), graph, CodeKind::JS_TO_WASM_FUNCTION,
    std::move(debug_name), WasmAssemblerOptions());
7692}

7694static MachineRepresentation NormalizeFastApiRepresentation(
  const CTypeInfo& info) {
MachineType t = MachineType::TypeForCType(info);
// Wasm representation of bool is i32 instead of i1.
if (t.semantic() == MachineSemantic::kBool) {
  return MachineRepresentation::kWord32;
}
return t.representation();
7702}

7704static bool IsSupportedWasmFastApiFunction(
  const wasm::FunctionSig* expected_sig, Handle<SharedFunctionInfo> shared) {
if (!shared->IsApiFunction()) {
  return false;
}
if (shared->get_api_func_data().GetCFunctionsCount() == 0) {
  return false;
}
if (!shared->get_api_func_data().accept_any_receiver()) {
  return false;
}
if (!shared->get_api_func_data().signature().IsUndefined()) {
  // TODO(wasm): CFunctionInfo* signature check.
  return false;
}
const CFunctionInfo* info = shared->get_api_func_data().GetCSignature(0);
if (!fast_api_call::CanOptimizeFastSignature(info)) {
  return false;
}
// Options are not supported yet.
if (info->HasOptions()) {
  return false;
}

const auto log_imported_function_mismatch = [&shared]() {
  if (FLAG_trace_opt) {
    CodeTracer::Scope scope(shared->GetIsolate()->GetCodeTracer());
    PrintF(scope.file(), "[disabled optimization for ");
    shared->ShortPrint(scope.file());
    PrintF(scope.file(),
           ", reason: the signature of the imported function in the Wasm "
           "module doesn't match that of the Fast API function]\n");
  }
};

// C functions only have one return value.
if (expected_sig->return_count() > 1) {
  // Here and below, we log when the function we call is declared as an Api
  // function but we cannot optimize the call, which might be unxepected. In
  // that case we use the "slow" path making a normal Wasm->JS call and
  // calling the "slow" callback specified in FunctionTemplate::New().
  log_imported_function_mismatch();
  return false;
}
CTypeInfo return_info = info->ReturnInfo();
// Unsupported if return type doesn't match.
if (expected_sig->return_count() == 0 &&
    return_info.GetType() != CTypeInfo::Type::kVoid) {
  log_imported_function_mismatch();
  return false;
}
// Unsupported if return type doesn't match.
if (expected_sig->return_count() == 1) {
  if (return_info.GetType() == CTypeInfo::Type::kVoid) {
    log_imported_function_mismatch();
    return false;
  }
  if (NormalizeFastApiRepresentation(return_info) !=
      expected_sig->GetReturn(0).machine_type().representation()) {
    log_imported_function_mismatch();
    return false;
  }
}
// Unsupported if arity doesn't match.
if (expected_sig->parameter_count() != info->ArgumentCount() - 1) {
  log_imported_function_mismatch();
  return false;
}
// Unsupported if any argument types don't match.
for (unsigned int i = 0; i < expected_sig->parameter_count(); i += 1) {
  // Arg 0 is the receiver, skip over it since wasm doesn't
  // have a concept of receivers.
  CTypeInfo arg = info->ArgumentInfo(i + 1);
  if (NormalizeFastApiRepresentation(arg) !=
      expected_sig->GetParam(i).machine_type().representation()) {
    log_imported_function_mismatch();
    return false;
  }
}
return true;
7784}

7786WasmImportData ResolveWasmImportCall(
  Handle<JSReceiver> callable, const wasm::FunctionSig* expected_sig,
  const wasm::WasmModule* module,
  const wasm::WasmFeatures& enabled_features) {
Isolate* isolate = callable->GetIsolate();
Handle<HeapObject> no_suspender;
if (WasmExportedFunction::IsWasmExportedFunction(*callable)) {
  auto imported_function = Handle<WasmExportedFunction>::cast(callable);
  if (!imported_function->MatchesSignature(module, expected_sig)) {
    return {WasmImportCallKind::kLinkError, callable, no_suspender};
  }
  uint32_t func_index =
      static_cast<uint32_t>(imported_function->function_index());
  if (func_index >=
      imported_function->instance().module()->num_imported_functions) {
    return {WasmImportCallKind::kWasmToWasm, callable, no_suspender};
  }
  // Resolve the shortcut to the underlying callable and continue.
  Handle<WasmInstanceObject> instance(imported_function->instance(), isolate);
  ImportedFunctionEntry entry(instance, func_index);
  callable = handle(entry.callable(), isolate);
}
Handle<HeapObject> suspender = isolate->factory()->undefined_value();
if (WasmJSFunction::IsWasmJSFunction(*callable)) {
  auto js_function = Handle<WasmJSFunction>::cast(callable);
  suspender = handle(js_function->GetSuspender(), isolate);
  if ((!suspender->IsUndefined() &&
       !js_function->MatchesSignatureForSuspend(expected_sig)) ||
      (suspender->IsUndefined() &&
       !js_function->MatchesSignature(expected_sig))) {
    return {WasmImportCallKind::kLinkError, callable, no_suspender};
  }
  // Resolve the short-cut to the underlying callable and continue.
  callable = handle(js_function->GetCallable(), isolate);
}
if (WasmCapiFunction::IsWasmCapiFunction(*callable)) {
  auto capi_function = Handle<WasmCapiFunction>::cast(callable);
  if (!capi_function->MatchesSignature(expected_sig)) {
    return {WasmImportCallKind::kLinkError, callable, no_suspender};
  }
  return {WasmImportCallKind::kWasmToCapi, callable, no_suspender};
}
// Assuming we are calling to JS, check whether this would be a runtime error.
if (!wasm::IsJSCompatibleSignature(expected_sig, module, enabled_features)) {
  return {WasmImportCallKind::kRuntimeTypeError, callable, no_suspender};
}
// Check if this can be a JS fast API call.
if (FLAG_turbo_fast_api_calls &&
    (callable->IsJSFunction() || callable->IsJSBoundFunction())) {
  Handle<JSFunction> target;
  if (callable->IsJSBoundFunction()) {
    Handle<JSBoundFunction> bound_target =
        Handle<JSBoundFunction>::cast(callable);
    // Nested bound functions and arguments not supported yet.
    if (bound_target->bound_arguments().length() == 0 &&
        !bound_target->bound_target_function().IsJSBoundFunction()) {
      Handle<JSReceiver> bound_target_function = handle(
          bound_target->bound_target_function(), callable->GetIsolate());
      if (bound_target_function->IsJSFunction()) {
        target = Handle<JSFunction>::cast(bound_target_function);
      }
    }
  } else {
    DCHECK(callable->IsJSFunction())((void) 0);
    target = Handle<JSFunction>::cast(callable);
  }

  if (!target.is_null()) {
    Handle<SharedFunctionInfo> shared(target->shared(), target->GetIsolate());

    if (IsSupportedWasmFastApiFunction(expected_sig, shared)) {
      return {WasmImportCallKind::kWasmToJSFastApi, target, no_suspender};
    }
  }
}
// For JavaScript calls, determine whether the target has an arity match.
if (callable->IsJSFunction()) {
  Handle<JSFunction> function = Handle<JSFunction>::cast(callable);
  Handle<SharedFunctionInfo> shared(function->shared(),
                                    function->GetIsolate());

7867// Check for math intrinsics.
7868#define COMPARE_SIG_FOR_BUILTIN(name)                                     \
{                                                                       \
  const wasm::FunctionSig* sig =                                        \
      wasm::WasmOpcodes::Signature(wasm::kExpr##name);                  \
  if (!sig) sig = wasm::WasmOpcodes::AsmjsSignature(wasm::kExpr##name); \
  DCHECK_NOT_NULL(sig)((void) 0);                                                 \
  if (*expected_sig == *sig) {                                          \
    return {WasmImportCallKind::k##name, callable, no_suspender};       \
  }                                                                     \
}
7878#define COMPARE_SIG_FOR_BUILTIN_F64(name) \
case Builtin::kMath##name:              \
  COMPARE_SIG_FOR_BUILTIN(F64##name);   \
  break;
7882#define COMPARE_SIG_FOR_BUILTIN_F32_F64(name) \
case Builtin::kMath##name:                  \
  COMPARE_SIG_FOR_BUILTIN(F64##name);       \
  COMPARE_SIG_FOR_BUILTIN(F32##name);       \
  break;

  if (FLAG_wasm_math_intrinsics && shared->HasBuiltinId()) {
    switch (shared->builtin_id()) {
      COMPARE_SIG_FOR_BUILTIN_F64(Acos);
      COMPARE_SIG_FOR_BUILTIN_F64(Asin);
      COMPARE_SIG_FOR_BUILTIN_F64(Atan);
      COMPARE_SIG_FOR_BUILTIN_F64(Cos);
      COMPARE_SIG_FOR_BUILTIN_F64(Sin);
      COMPARE_SIG_FOR_BUILTIN_F64(Tan);
      COMPARE_SIG_FOR_BUILTIN_F64(Exp);
      COMPARE_SIG_FOR_BUILTIN_F64(Log);
      COMPARE_SIG_FOR_BUILTIN_F64(Atan2);
      COMPARE_SIG_FOR_BUILTIN_F64(Pow);
      COMPARE_SIG_FOR_BUILTIN_F32_F64(Min);
      COMPARE_SIG_FOR_BUILTIN_F32_F64(Max);
      COMPARE_SIG_FOR_BUILTIN_F32_F64(Abs);
      COMPARE_SIG_FOR_BUILTIN_F32_F64(Ceil);
      COMPARE_SIG_FOR_BUILTIN_F32_F64(Floor);
      COMPARE_SIG_FOR_BUILTIN_F32_F64(Sqrt);
      case Builtin::kMathFround:
        COMPARE_SIG_FOR_BUILTIN(F32ConvertF64);
        break;
      default:
        break;
    }
  }

7914#undef COMPARE_SIG_FOR_BUILTIN
7915#undef COMPARE_SIG_FOR_BUILTIN_F64
7916#undef COMPARE_SIG_FOR_BUILTIN_F32_F64

  if (IsClassConstructor(shared->kind())) {
    // Class constructor will throw anyway.
    return {WasmImportCallKind::kUseCallBuiltin, callable, suspender};
  }

  if (shared->internal_formal_parameter_count_without_receiver() ==
      expected_sig->parameter_count()) {
    return {WasmImportCallKind::kJSFunctionArityMatch, callable, suspender};
  }

  // If function isn't compiled, compile it now.
  Isolate* isolate = callable->GetIsolate();
  IsCompiledScope is_compiled_scope(shared->is_compiled_scope(isolate));
  if (!is_compiled_scope.is_compiled()) {
    Compiler::Compile(isolate, function, Compiler::CLEAR_EXCEPTION,
                      &is_compiled_scope);
  }

  return {WasmImportCallKind::kJSFunctionArityMismatch, callable, suspender};
}
// Unknown case. Use the call builtin.
return {WasmImportCallKind::kUseCallBuiltin, callable, suspender};
7940}

7942namespace {

7944wasm::WasmOpcode GetMathIntrinsicOpcode(WasmImportCallKind kind,
                                      const char** name_ptr) {
7946#define CASE(name)                          \
case WasmImportCallKind::k##name:         \
  *name_ptr = "WasmMathIntrinsic:" #name; \
  return wasm::kExpr##name
switch (kind) {
  CASE(F64Acos);
  CASE(F64Asin);
  CASE(F64Atan);
  CASE(F64Cos);
  CASE(F64Sin);
  CASE(F64Tan);
  CASE(F64Exp);
  CASE(F64Log);
  CASE(F64Atan2);
  CASE(F64Pow);
  CASE(F64Ceil);
  CASE(F64Floor);
  CASE(F64Sqrt);
  CASE(F64Min);
  CASE(F64Max);
  CASE(F64Abs);
  CASE(F32Min);
  CASE(F32Max);
  CASE(F32Abs);
  CASE(F32Ceil);
  CASE(F32Floor);
  CASE(F32Sqrt);
  CASE(F32ConvertF64);
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}
7977#undef CASE
7978}

7980wasm::WasmCompilationResult CompileWasmMathIntrinsic(
  WasmImportCallKind kind, const wasm::FunctionSig* sig) {
DCHECK_EQ(1, sig->return_count())((void) 0);

TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.wasm.detailed"),static v8::base::AtomicWord trace_event_unique_atomic7985 = 0
; const uint8_t* trace_event_unique_category_group_enabled7985
; trace_event_unique_category_group_enabled7985 = reinterpret_cast
<const uint8_t*>(v8::base::Relaxed_Load(&(trace_event_unique_atomic7985
))); if (!trace_event_unique_category_group_enabled7985) { trace_event_unique_category_group_enabled7985
 = v8::internal::tracing::TraceEventHelper::GetTracingController
() ->GetCategoryGroupEnabled("disabled-by-default-" "v8.wasm.detailed"
); v8::base::Relaxed_Store(&(trace_event_unique_atomic7985
), (reinterpret_cast<v8::base::AtomicWord>( trace_event_unique_category_group_enabled7985
))); };; v8::internal::tracing::ScopedTracer trace_event_unique_tracer7985
; if (v8::base::Relaxed_Load(reinterpret_cast<const v8::base
::Atomic8*>( trace_event_unique_category_group_enabled7985
)) & (kEnabledForRecording_CategoryGroupEnabledFlags | kEnabledForEventCallback_CategoryGroupEnabledFlags
)) { uint64_t h = v8::internal::tracing::AddTraceEvent( ('X')
, trace_event_unique_category_group_enabled7985, "wasm.CompileWasmMathIntrinsic"
, v8::internal::tracing::kGlobalScope, v8::internal::tracing::
kNoId, v8::internal::tracing::kNoId, (static_cast<unsigned
 int>(0))); trace_event_unique_tracer7985 .Initialize(trace_event_unique_category_group_enabled7985
, "wasm.CompileWasmMathIntrinsic", h); }
             "wasm.CompileWasmMathIntrinsic")static v8::base::AtomicWord trace_event_unique_atomic7985 = 0
; const uint8_t* trace_event_unique_category_group_enabled7985
; trace_event_unique_category_group_enabled7985 = reinterpret_cast
<const uint8_t*>(v8::base::Relaxed_Load(&(trace_event_unique_atomic7985
))); if (!trace_event_unique_category_group_enabled7985) { trace_event_unique_category_group_enabled7985
 = v8::internal::tracing::TraceEventHelper::GetTracingController
() ->GetCategoryGroupEnabled("disabled-by-default-" "v8.wasm.detailed"
); v8::base::Relaxed_Store(&(trace_event_unique_atomic7985
), (reinterpret_cast<v8::base::AtomicWord>( trace_event_unique_category_group_enabled7985
))); };; v8::internal::tracing::ScopedTracer trace_event_unique_tracer7985
; if (v8::base::Relaxed_Load(reinterpret_cast<const v8::base
::Atomic8*>( trace_event_unique_category_group_enabled7985
)) & (kEnabledForRecording_CategoryGroupEnabledFlags | kEnabledForEventCallback_CategoryGroupEnabledFlags
)) { uint64_t h = v8::internal::tracing::AddTraceEvent( ('X')
, trace_event_unique_category_group_enabled7985, "wasm.CompileWasmMathIntrinsic"
, v8::internal::tracing::kGlobalScope, v8::internal::tracing::
kNoId, v8::internal::tracing::kNoId, (static_cast<unsigned
 int>(0))); trace_event_unique_tracer7985 .Initialize(trace_event_unique_category_group_enabled7985
, "wasm.CompileWasmMathIntrinsic", h); };

Zone zone(wasm::GetWasmEngine()->allocator(), ZONE_NAME__func__, kCompressGraphZone);

// Compile a Wasm function with a single bytecode and let TurboFan
// generate either inlined machine code or a call to a helper.
SourcePositionTable* source_positions = nullptr;
MachineGraph* mcgraph = zone.New<MachineGraph>(
    zone.New<Graph>(&zone), zone.New<CommonOperatorBuilder>(&zone),
    zone.New<MachineOperatorBuilder>(
        &zone, MachineType::PointerRepresentation(),
        InstructionSelector::SupportedMachineOperatorFlags(),
        InstructionSelector::AlignmentRequirements()));

wasm::CompilationEnv env(
    nullptr, wasm::kNoBoundsChecks,
    wasm::RuntimeExceptionSupport::kNoRuntimeExceptionSupport,
    wasm::WasmFeatures::All(), wasm::DynamicTiering::kDisabled);

WasmGraphBuilder builder(&env, mcgraph->zone(), mcgraph, sig,
                         source_positions);

// Set up the graph start.
builder.Start(static_cast<int>(sig->parameter_count() + 1 + 1));

// Generate either a unop or a binop.
Node* node = nullptr;
const char* debug_name = "WasmMathIntrinsic";
auto opcode = GetMathIntrinsicOpcode(kind, &debug_name);
switch (sig->parameter_count()) {
  case 1:
    node = builder.Unop(opcode, builder.Param(1));
    break;
  case 2:
    node = builder.Binop(opcode, builder.Param(1), builder.Param(2));
    break;
  default:
    UNREACHABLE()V8_Fatal("unreachable code");
}

builder.Return(node);

// Run the compiler pipeline to generate machine code.
auto call_descriptor = GetWasmCallDescriptor(&zone, sig);
if (mcgraph->machine()->Is32()) {
  call_descriptor = GetI32WasmCallDescriptor(&zone, call_descriptor);
}

// The code does not call to JS, but conceptually it is an import wrapper,
// hence use {WASM_TO_JS_FUNCTION} here.
// TODO(wasm): Rename this to {WASM_IMPORT_CALL}?
return Pipeline::GenerateCodeForWasmNativeStub(
    call_descriptor, mcgraph, CodeKind::WASM_TO_JS_FUNCTION, debug_name,
    WasmStubAssemblerOptions(), source_positions);
8039}

8041}  // namespace

8043wasm::WasmCompilationResult CompileWasmImportCallWrapper(
  wasm::CompilationEnv* env, WasmImportCallKind kind,
  const wasm::FunctionSig* sig, bool source_positions, int expected_arity,
  wasm::Suspend suspend) {
DCHECK_NE(WasmImportCallKind::kLinkError, kind)((void) 0);
DCHECK_NE(WasmImportCallKind::kWasmToWasm, kind)((void) 0);
DCHECK_NE(WasmImportCallKind::kWasmToJSFastApi, kind)((void) 0);

// Check for math intrinsics first.
if (FLAG_wasm_math_intrinsics &&
    kind >= WasmImportCallKind::kFirstMathIntrinsic &&
    kind <= WasmImportCallKind::kLastMathIntrinsic) {
  return CompileWasmMathIntrinsic(kind, sig);
}

TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.wasm.detailed"),static v8::base::AtomicWord trace_event_unique_atomic8059 = 0
; const uint8_t* trace_event_unique_category_group_enabled8059
; trace_event_unique_category_group_enabled8059 = reinterpret_cast
<const uint8_t*>(v8::base::Relaxed_Load(&(trace_event_unique_atomic8059
))); if (!trace_event_unique_category_group_enabled8059) { trace_event_unique_category_group_enabled8059
 = v8::internal::tracing::TraceEventHelper::GetTracingController
() ->GetCategoryGroupEnabled("disabled-by-default-" "v8.wasm.detailed"
); v8::base::Relaxed_Store(&(trace_event_unique_atomic8059
), (reinterpret_cast<v8::base::AtomicWord>( trace_event_unique_category_group_enabled8059
))); };; v8::internal::tracing::ScopedTracer trace_event_unique_tracer8059
; if (v8::base::Relaxed_Load(reinterpret_cast<const v8::base
::Atomic8*>( trace_event_unique_category_group_enabled8059
)) & (kEnabledForRecording_CategoryGroupEnabledFlags | kEnabledForEventCallback_CategoryGroupEnabledFlags
)) { uint64_t h = v8::internal::tracing::AddTraceEvent( ('X')
, trace_event_unique_category_group_enabled8059, "wasm.CompileWasmImportCallWrapper"
, v8::internal::tracing::kGlobalScope, v8::internal::tracing::
kNoId, v8::internal::tracing::kNoId, (static_cast<unsigned
 int>(0))); trace_event_unique_tracer8059 .Initialize(trace_event_unique_category_group_enabled8059
, "wasm.CompileWasmImportCallWrapper", h); }
             "wasm.CompileWasmImportCallWrapper")static v8::base::AtomicWord trace_event_unique_atomic8059 = 0
; const uint8_t* trace_event_unique_category_group_enabled8059
; trace_event_unique_category_group_enabled8059 = reinterpret_cast
<const uint8_t*>(v8::base::Relaxed_Load(&(trace_event_unique_atomic8059
))); if (!trace_event_unique_category_group_enabled8059) { trace_event_unique_category_group_enabled8059
 = v8::internal::tracing::TraceEventHelper::GetTracingController
() ->GetCategoryGroupEnabled("disabled-by-default-" "v8.wasm.detailed"
); v8::base::Relaxed_Store(&(trace_event_unique_atomic8059
), (reinterpret_cast<v8::base::AtomicWord>( trace_event_unique_category_group_enabled8059
))); };; v8::internal::tracing::ScopedTracer trace_event_unique_tracer8059
; if (v8::base::Relaxed_Load(reinterpret_cast<const v8::base
::Atomic8*>( trace_event_unique_category_group_enabled8059
)) & (kEnabledForRecording_CategoryGroupEnabledFlags | kEnabledForEventCallback_CategoryGroupEnabledFlags
)) { uint64_t h = v8::internal::tracing::AddTraceEvent( ('X')
, trace_event_unique_category_group_enabled8059, "wasm.CompileWasmImportCallWrapper"
, v8::internal::tracing::kGlobalScope, v8::internal::tracing::
kNoId, v8::internal::tracing::kNoId, (static_cast<unsigned
 int>(0))); trace_event_unique_tracer8059 .Initialize(trace_event_unique_category_group_enabled8059
, "wasm.CompileWasmImportCallWrapper", h); };
base::TimeTicks start_time;
if (V8_UNLIKELY(FLAG_trace_wasm_compilation_times)(__builtin_expect(!!(FLAG_trace_wasm_compilation_times), 0))) {
  start_time = base::TimeTicks::Now();
}

//----------------------------------------------------------------------------
// Create the Graph
//----------------------------------------------------------------------------
Zone zone(wasm::GetWasmEngine()->allocator(), ZONE_NAME__func__, kCompressGraphZone);
Graph* graph = zone.New<Graph>(&zone);
CommonOperatorBuilder* common = zone.New<CommonOperatorBuilder>(&zone);
MachineOperatorBuilder* machine = zone.New<MachineOperatorBuilder>(
    &zone, MachineType::PointerRepresentation(),
    InstructionSelector::SupportedMachineOperatorFlags(),
    InstructionSelector::AlignmentRequirements());
MachineGraph* mcgraph = zone.New<MachineGraph>(graph, common, machine);

SourcePositionTable* source_position_table =
    source_positions ? zone.New<SourcePositionTable>(graph) : nullptr;

WasmWrapperGraphBuilder builder(
    &zone, mcgraph, sig, env->module,
    WasmGraphBuilder::kWasmApiFunctionRefMode, nullptr, source_position_table,
    StubCallMode::kCallWasmRuntimeStub, env->enabled_features);
builder.BuildWasmToJSWrapper(kind, expected_arity, suspend);

// Build a name in the form "wasm-to-js-<kind>-<signature>".
constexpr size_t kMaxNameLen = 128;
char func_name[kMaxNameLen];
int name_prefix_len = SNPrintF(base::VectorOf(func_name, kMaxNameLen),
                               "wasm-to-js-%d-", static_cast<int>(kind));
PrintSignature(base::VectorOf(func_name, kMaxNameLen) + name_prefix_len, sig,
               '-');

// Schedule and compile to machine code.
CallDescriptor* incoming =
    GetWasmCallDescriptor(&zone, sig, WasmCallKind::kWasmImportWrapper);
if (machine->Is32()) {
  incoming = GetI32WasmCallDescriptor(&zone, incoming);
}
wasm::WasmCompilationResult result = Pipeline::GenerateCodeForWasmNativeStub(
    incoming, mcgraph, CodeKind::WASM_TO_JS_FUNCTION, func_name,
    WasmStubAssemblerOptions(), source_position_table);

if (V8_UNLIKELY(FLAG_trace_wasm_compilation_times)(__builtin_expect(!!(FLAG_trace_wasm_compilation_times), 0))) {
  base::TimeDelta time = base::TimeTicks::Now() - start_time;
  int codesize = result.code_desc.body_size();
  StdoutStream{} << "Compiled WasmToJS wrapper " << func_name << ", took "
                 << time.InMilliseconds() << " ms; codesize " << codesize
                 << std::endl;
}

return result;
8113}

8115wasm::WasmCode* CompileWasmCapiCallWrapper(wasm::NativeModule* native_module,
                                         const wasm::FunctionSig* sig) {
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.wasm.detailed"),static v8::base::AtomicWord trace_event_unique_atomic8118 = 0
; const uint8_t* trace_event_unique_category_group_enabled8118
; trace_event_unique_category_group_enabled8118 = reinterpret_cast
<const uint8_t*>(v8::base::Relaxed_Load(&(trace_event_unique_atomic8118
))); if (!trace_event_unique_category_group_enabled8118) { trace_event_unique_category_group_enabled8118
 = v8::internal::tracing::TraceEventHelper::GetTracingController
() ->GetCategoryGroupEnabled("disabled-by-default-" "v8.wasm.detailed"
); v8::base::Relaxed_Store(&(trace_event_unique_atomic8118
), (reinterpret_cast<v8::base::AtomicWord>( trace_event_unique_category_group_enabled8118
))); };; v8::internal::tracing::ScopedTracer trace_event_unique_tracer8118
; if (v8::base::Relaxed_Load(reinterpret_cast<const v8::base
::Atomic8*>( trace_event_unique_category_group_enabled8118
)) & (kEnabledForRecording_CategoryGroupEnabledFlags | kEnabledForEventCallback_CategoryGroupEnabledFlags
)) { uint64_t h = v8::internal::tracing::AddTraceEvent( ('X')
, trace_event_unique_category_group_enabled8118, "wasm.CompileWasmCapiFunction"
, v8::internal::tracing::kGlobalScope, v8::internal::tracing::
kNoId, v8::internal::tracing::kNoId, (static_cast<unsigned
 int>(0))); trace_event_unique_tracer8118 .Initialize(trace_event_unique_category_group_enabled8118
, "wasm.CompileWasmCapiFunction", h); }
             "wasm.CompileWasmCapiFunction")static v8::base::AtomicWord trace_event_unique_atomic8118 = 0
; const uint8_t* trace_event_unique_category_group_enabled8118
; trace_event_unique_category_group_enabled8118 = reinterpret_cast
<const uint8_t*>(v8::base::Relaxed_Load(&(trace_event_unique_atomic8118
))); if (!trace_event_unique_category_group_enabled8118) { trace_event_unique_category_group_enabled8118
 = v8::internal::tracing::TraceEventHelper::GetTracingController
() ->GetCategoryGroupEnabled("disabled-by-default-" "v8.wasm.detailed"
); v8::base::Relaxed_Store(&(trace_event_unique_atomic8118
), (reinterpret_cast<v8::base::AtomicWord>( trace_event_unique_category_group_enabled8118
))); };; v8::internal::tracing::ScopedTracer trace_event_unique_tracer8118
; if (v8::base::Relaxed_Load(reinterpret_cast<const v8::base
::Atomic8*>( trace_event_unique_category_group_enabled8118
)) & (kEnabledForRecording_CategoryGroupEnabledFlags | kEnabledForEventCallback_CategoryGroupEnabledFlags
)) { uint64_t h = v8::internal::tracing::AddTraceEvent( ('X')
, trace_event_unique_category_group_enabled8118, "wasm.CompileWasmCapiFunction"
, v8::internal::tracing::kGlobalScope, v8::internal::tracing::
kNoId, v8::internal::tracing::kNoId, (static_cast<unsigned
 int>(0))); trace_event_unique_tracer8118 .Initialize(trace_event_unique_category_group_enabled8118
, "wasm.CompileWasmCapiFunction", h); };

Zone zone(wasm::GetWasmEngine()->allocator(), ZONE_NAME__func__, kCompressGraphZone);

// TODO(jkummerow): Extract common code into helper method.
SourcePositionTable* source_positions = nullptr;
MachineGraph* mcgraph = zone.New<MachineGraph>(
    zone.New<Graph>(&zone), zone.New<CommonOperatorBuilder>(&zone),
    zone.New<MachineOperatorBuilder>(
        &zone, MachineType::PointerRepresentation(),
        InstructionSelector::SupportedMachineOperatorFlags(),
        InstructionSelector::AlignmentRequirements()));

WasmWrapperGraphBuilder builder(
    &zone, mcgraph, sig, native_module->module(),
    WasmGraphBuilder::kWasmApiFunctionRefMode, nullptr, source_positions,
    StubCallMode::kCallWasmRuntimeStub, native_module->enabled_features());

builder.BuildCapiCallWrapper();

// Run the compiler pipeline to generate machine code.
CallDescriptor* call_descriptor =
    GetWasmCallDescriptor(&zone, sig, WasmCallKind::kWasmCapiFunction);
if (mcgraph->machine()->Is32()) {
  call_descriptor = GetI32WasmCallDescriptor(&zone, call_descriptor);
}

const char* debug_name = "WasmCapiCall";
wasm::WasmCompilationResult result = Pipeline::GenerateCodeForWasmNativeStub(
    call_descriptor, mcgraph, CodeKind::WASM_TO_CAPI_FUNCTION, debug_name,
    WasmStubAssemblerOptions(), source_positions);
wasm::WasmCode* published_code;
{
  wasm::CodeSpaceWriteScope code_space_write_scope(native_module);
  std::unique_ptr<wasm::WasmCode> wasm_code = native_module->AddCode(
      wasm::kAnonymousFuncIndex, result.code_desc, result.frame_slot_count,
      result.tagged_parameter_slots,
      result.protected_instructions_data.as_vector(),
      result.source_positions.as_vector(), wasm::WasmCode::kWasmToCapiWrapper,
      wasm::ExecutionTier::kNone, wasm::kNoDebugging);
  published_code = native_module->PublishCode(std::move(wasm_code));
}
return published_code;
8161}

8163wasm::WasmCode* CompileWasmJSFastCallWrapper(wasm::NativeModule* native_module,
                                           const wasm::FunctionSig* sig,
                                           Handle<JSFunction> target) {
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.wasm.detailed"),static v8::base::AtomicWord trace_event_unique_atomic8167 = 0
; const uint8_t* trace_event_unique_category_group_enabled8167
; trace_event_unique_category_group_enabled8167 = reinterpret_cast
<const uint8_t*>(v8::base::Relaxed_Load(&(trace_event_unique_atomic8167
))); if (!trace_event_unique_category_group_enabled8167) { trace_event_unique_category_group_enabled8167
 = v8::internal::tracing::TraceEventHelper::GetTracingController
() ->GetCategoryGroupEnabled("disabled-by-default-" "v8.wasm.detailed"
); v8::base::Relaxed_Store(&(trace_event_unique_atomic8167
), (reinterpret_cast<v8::base::AtomicWord>( trace_event_unique_category_group_enabled8167
))); };; v8::internal::tracing::ScopedTracer trace_event_unique_tracer8167
; if (v8::base::Relaxed_Load(reinterpret_cast<const v8::base
::Atomic8*>( trace_event_unique_category_group_enabled8167
)) & (kEnabledForRecording_CategoryGroupEnabledFlags | kEnabledForEventCallback_CategoryGroupEnabledFlags
)) { uint64_t h = v8::internal::tracing::AddTraceEvent( ('X')
, trace_event_unique_category_group_enabled8167, "wasm.CompileWasmJSFastCallWrapper"
, v8::internal::tracing::kGlobalScope, v8::internal::tracing::
kNoId, v8::internal::tracing::kNoId, (static_cast<unsigned
 int>(0))); trace_event_unique_tracer8167 .Initialize(trace_event_unique_category_group_enabled8167
, "wasm.CompileWasmJSFastCallWrapper", h); }
             "wasm.CompileWasmJSFastCallWrapper")static v8::base::AtomicWord trace_event_unique_atomic8167 = 0
; const uint8_t* trace_event_unique_category_group_enabled8167
; trace_event_unique_category_group_enabled8167 = reinterpret_cast
<const uint8_t*>(v8::base::Relaxed_Load(&(trace_event_unique_atomic8167
))); if (!trace_event_unique_category_group_enabled8167) { trace_event_unique_category_group_enabled8167
 = v8::internal::tracing::TraceEventHelper::GetTracingController
() ->GetCategoryGroupEnabled("disabled-by-default-" "v8.wasm.detailed"
); v8::base::Relaxed_Store(&(trace_event_unique_atomic8167
), (reinterpret_cast<v8::base::AtomicWord>( trace_event_unique_category_group_enabled8167
))); };; v8::internal::tracing::ScopedTracer trace_event_unique_tracer8167
; if (v8::base::Relaxed_Load(reinterpret_cast<const v8::base
::Atomic8*>( trace_event_unique_category_group_enabled8167
)) & (kEnabledForRecording_CategoryGroupEnabledFlags | kEnabledForEventCallback_CategoryGroupEnabledFlags
)) { uint64_t h = v8::internal::tracing::AddTraceEvent( ('X')
, trace_event_unique_category_group_enabled8167, "wasm.CompileWasmJSFastCallWrapper"
, v8::internal::tracing::kGlobalScope, v8::internal::tracing::
kNoId, v8::internal::tracing::kNoId, (static_cast<unsigned
 int>(0))); trace_event_unique_tracer8167 .Initialize(trace_event_unique_category_group_enabled8167
, "wasm.CompileWasmJSFastCallWrapper", h); };

Zone zone(wasm::GetWasmEngine()->allocator(), ZONE_NAME__func__, kCompressGraphZone);

// TODO(jkummerow): Extract common code into helper method.
SourcePositionTable* source_positions = nullptr;
MachineGraph* mcgraph = zone.New<MachineGraph>(
    zone.New<Graph>(&zone), zone.New<CommonOperatorBuilder>(&zone),
    zone.New<MachineOperatorBuilder>(
        &zone, MachineType::PointerRepresentation(),
        InstructionSelector::SupportedMachineOperatorFlags(),
        InstructionSelector::AlignmentRequirements()));

WasmWrapperGraphBuilder builder(
    &zone, mcgraph, sig, native_module->module(),
    WasmGraphBuilder::kWasmApiFunctionRefMode, nullptr, source_positions,
    StubCallMode::kCallWasmRuntimeStub, native_module->enabled_features());

// Set up the graph start.
int param_count = static_cast<int>(sig->parameter_count()) +
                  1 /* offset for first parameter index being -1 */ +
                  1 /* Wasm instance */ + 1 /* kExtraCallableParam */;
builder.Start(param_count);
builder.BuildJSFastApiCallWrapper(target);

// Run the compiler pipeline to generate machine code.
CallDescriptor* call_descriptor =
    GetWasmCallDescriptor(&zone, sig, WasmCallKind::kWasmImportWrapper);
if (mcgraph->machine()->Is32()) {
  call_descriptor = GetI32WasmCallDescriptor(&zone, call_descriptor);
}

const char* debug_name = "WasmJSFastApiCall";
wasm::WasmCompilationResult result = Pipeline::GenerateCodeForWasmNativeStub(
    call_descriptor, mcgraph, CodeKind::WASM_TO_JS_FUNCTION, debug_name,
    WasmStubAssemblerOptions(), source_positions);
{
  wasm::CodeSpaceWriteScope code_space_write_scope(native_module);
  std::unique_ptr<wasm::WasmCode> wasm_code = native_module->AddCode(
      wasm::kAnonymousFuncIndex, result.code_desc, result.frame_slot_count,
      result.tagged_parameter_slots,
      result.protected_instructions_data.as_vector(),
      result.source_positions.as_vector(), wasm::WasmCode::kWasmToJsWrapper,
      wasm::ExecutionTier::kNone, wasm::kNoDebugging);
  return native_module->PublishCode(std::move(wasm_code));
}
8213}

8215MaybeHandle<Code> CompileWasmToJSWrapper(Isolate* isolate,
                                       const wasm::FunctionSig* sig,
                                       WasmImportCallKind kind,
                                       int expected_arity,
                                       wasm::Suspend suspend) {
std::unique_ptr<Zone> zone = std::make_unique<Zone>(
    isolate->allocator(), ZONE_NAME__func__, kCompressGraphZone);

// Create the Graph
Graph* graph = zone->New<Graph>(zone.get());
CommonOperatorBuilder* common = zone->New<CommonOperatorBuilder>(zone.get());
MachineOperatorBuilder* machine = zone->New<MachineOperatorBuilder>(
    zone.get(), MachineType::PointerRepresentation(),
    InstructionSelector::SupportedMachineOperatorFlags(),
    InstructionSelector::AlignmentRequirements());
MachineGraph* mcgraph = zone->New<MachineGraph>(graph, common, machine);

WasmWrapperGraphBuilder builder(zone.get(), mcgraph, sig, nullptr,
                                WasmGraphBuilder::kWasmApiFunctionRefMode,
                                nullptr, nullptr,
                                StubCallMode::kCallBuiltinPointer,
                                wasm::WasmFeatures::FromIsolate(isolate));
builder.BuildWasmToJSWrapper(kind, expected_arity, suspend);

// Build a name in the form "wasm-to-js-<kind>-<signature>".
constexpr size_t kMaxNameLen = 128;
constexpr size_t kNamePrefixLen = 11;
auto name_buffer = std::unique_ptr<char[]>(new char[kMaxNameLen]);
memcpy(name_buffer.get(), "wasm-to-js:", kNamePrefixLen);
PrintSignature(
    base::VectorOf(name_buffer.get(), kMaxNameLen) + kNamePrefixLen, sig);

// Generate the call descriptor.
CallDescriptor* incoming =
    GetWasmCallDescriptor(zone.get(), sig, WasmCallKind::kWasmImportWrapper);

// Run the compilation job synchronously.
std::unique_ptr<TurbofanCompilationJob> job(
    Pipeline::NewWasmHeapStubCompilationJob(
        isolate, incoming, std::move(zone), graph,
        CodeKind::WASM_TO_JS_FUNCTION, std::move(name_buffer),
        AssemblerOptions::Default(isolate)));

// Compile the wrapper
if (job->ExecuteJob(isolate->counters()->runtime_call_stats()) ==
        CompilationJob::FAILED ||
    job->FinalizeJob(isolate) == CompilationJob::FAILED) {
  return Handle<Code>();
}
Handle<Code> code = job->compilation_info()->code();
return code;
8266}

8268MaybeHandle<Code> CompileJSToJSWrapper(Isolate* isolate,
                                     const wasm::FunctionSig* sig,
                                     const wasm::WasmModule* module) {
std::unique_ptr<Zone> zone = std::make_unique<Zone>(
    isolate->allocator(), ZONE_NAME__func__, kCompressGraphZone);
Graph* graph = zone->New<Graph>(zone.get());
CommonOperatorBuilder* common = zone->New<CommonOperatorBuilder>(zone.get());
MachineOperatorBuilder* machine = zone->New<MachineOperatorBuilder>(
    zone.get(), MachineType::PointerRepresentation(),
    InstructionSelector::SupportedMachineOperatorFlags(),
    InstructionSelector::AlignmentRequirements());
MachineGraph* mcgraph = zone->New<MachineGraph>(graph, common, machine);

WasmWrapperGraphBuilder builder(zone.get(), mcgraph, sig, module,
                                WasmGraphBuilder::kNoSpecialParameterMode,
                                isolate, nullptr,
                                StubCallMode::kCallBuiltinPointer,
                                wasm::WasmFeatures::FromIsolate(isolate));
builder.BuildJSToJSWrapper();

int wasm_count = static_cast<int>(sig->parameter_count());
CallDescriptor* incoming = Linkage::GetJSCallDescriptor(
    zone.get(), false, wasm_count + 1, CallDescriptor::kNoFlags);

// Build a name in the form "js-to-js:<params>:<returns>".
constexpr size_t kMaxNameLen = 128;
constexpr size_t kNamePrefixLen = 9;
auto name_buffer = std::unique_ptr<char[]>(new char[kMaxNameLen]);
memcpy(name_buffer.get(), "js-to-js:", kNamePrefixLen);
PrintSignature(
    base::VectorOf(name_buffer.get(), kMaxNameLen) + kNamePrefixLen, sig);

// Run the compilation job synchronously.
std::unique_ptr<TurbofanCompilationJob> job(
    Pipeline::NewWasmHeapStubCompilationJob(
        isolate, incoming, std::move(zone), graph,
        CodeKind::JS_TO_JS_FUNCTION, std::move(name_buffer),
        AssemblerOptions::Default(isolate)));

if (job->ExecuteJob(isolate->counters()->runtime_call_stats()) ==
        CompilationJob::FAILED ||
    job->FinalizeJob(isolate) == CompilationJob::FAILED) {
  return {};
}
Handle<Code> code = job->compilation_info()->code();

return code;
8315}

8317Handle<CodeT> CompileCWasmEntry(Isolate* isolate, const wasm::FunctionSig* sig,
                              const wasm::WasmModule* module) {
std::unique_ptr<Zone> zone = std::make_unique<Zone>(
    isolate->allocator(), ZONE_NAME__func__, kCompressGraphZone);
Graph* graph = zone->New<Graph>(zone.get());
CommonOperatorBuilder* common = zone->New<CommonOperatorBuilder>(zone.get());
MachineOperatorBuilder* machine = zone->New<MachineOperatorBuilder>(
    zone.get(), MachineType::PointerRepresentation(),
    InstructionSelector::SupportedMachineOperatorFlags(),
    InstructionSelector::AlignmentRequirements());
MachineGraph* mcgraph = zone->New<MachineGraph>(graph, common, machine);

WasmWrapperGraphBuilder builder(zone.get(), mcgraph, sig, module,
                                WasmGraphBuilder::kWasmApiFunctionRefMode,
                                nullptr, nullptr,
                                StubCallMode::kCallBuiltinPointer,
                                wasm::WasmFeatures::FromIsolate(isolate));
builder.BuildCWasmEntry();

// Schedule and compile to machine code.
MachineType sig_types[] = {MachineType::Pointer(),    // return
                           MachineType::Pointer(),    // target
                           MachineType::AnyTagged(),  // object_ref
                           MachineType::Pointer(),    // argv
                           MachineType::Pointer()};   // c_entry_fp
MachineSignature incoming_sig(1, 4, sig_types);
// Traps need the root register, for TailCallRuntime to call
// Runtime::kThrowWasmError.
CallDescriptor::Flags flags = CallDescriptor::kInitializeRootRegister;
CallDescriptor* incoming =
    Linkage::GetSimplifiedCDescriptor(zone.get(), &incoming_sig, flags);

// Build a name in the form "c-wasm-entry:<params>:<returns>".
constexpr size_t kMaxNameLen = 128;
constexpr size_t kNamePrefixLen = 13;
auto name_buffer = std::unique_ptr<char[]>(new char[kMaxNameLen]);
memcpy(name_buffer.get(), "c-wasm-entry:", kNamePrefixLen);
PrintSignature(
    base::VectorOf(name_buffer.get(), kMaxNameLen) + kNamePrefixLen, sig);

// Run the compilation job synchronously.
std::unique_ptr<TurbofanCompilationJob> job(
    Pipeline::NewWasmHeapStubCompilationJob(
        isolate, incoming, std::move(zone), graph, CodeKind::C_WASM_ENTRY,
        std::move(name_buffer), AssemblerOptions::Default(isolate)));

CHECK_NE(job->ExecuteJob(isolate->counters()->runtime_call_stats(), nullptr),do { bool _cmp = ::v8::base::CmpNEImpl< typename ::v8::base
::pass_value_or_ref<decltype(job->ExecuteJob(isolate->
counters()->runtime_call_stats(), nullptr))>::type, typename
 ::v8::base::pass_value_or_ref<decltype(CompilationJob::FAILED
)>::type>((job->ExecuteJob(isolate->counters()->
runtime_call_stats(), nullptr)), (CompilationJob::FAILED)); do
 { if ((__builtin_expect(!!(!(_cmp)), 0))) { V8_Fatal("Check failed: %s."
, "job->ExecuteJob(isolate->counters()->runtime_call_stats(), nullptr)"
 " " "!=" " " "CompilationJob::FAILED"); } } while (false); }
 while (false)
         CompilationJob::FAILED)do { bool _cmp = ::v8::base::CmpNEImpl< typename ::v8::base
::pass_value_or_ref<decltype(job->ExecuteJob(isolate->
counters()->runtime_call_stats(), nullptr))>::type, typename
 ::v8::base::pass_value_or_ref<decltype(CompilationJob::FAILED
)>::type>((job->ExecuteJob(isolate->counters()->
runtime_call_stats(), nullptr)), (CompilationJob::FAILED)); do
 { if ((__builtin_expect(!!(!(_cmp)), 0))) { V8_Fatal("Check failed: %s."
, "job->ExecuteJob(isolate->counters()->runtime_call_stats(), nullptr)"
 " " "!=" " " "CompilationJob::FAILED"); } } while (false); }
 while (false);
CHECK_NE(job->FinalizeJob(isolate), CompilationJob::FAILED)do { bool _cmp = ::v8::base::CmpNEImpl< typename ::v8::base
::pass_value_or_ref<decltype(job->FinalizeJob(isolate))
>::type, typename ::v8::base::pass_value_or_ref<decltype
(CompilationJob::FAILED)>::type>((job->FinalizeJob(isolate
)), (CompilationJob::FAILED)); do { if ((__builtin_expect(!!(
!(_cmp)), 0))) { V8_Fatal("Check failed: %s.", "job->FinalizeJob(isolate)"
 " " "!=" " " "CompilationJob::FAILED"); } } while (false); }
 while (false);

return ToCodeT(job->compilation_info()->code(), isolate);
8368}

8370namespace {

8372bool BuildGraphForWasmFunction(wasm::CompilationEnv* env,
                             const wasm::FunctionBody& func_body,
                             int func_index, wasm::WasmFeatures* detected,
                             MachineGraph* mcgraph,
                             std::vector<compiler::WasmLoopInfo>* loop_infos,
                             NodeOriginTable* node_origins,
                             SourcePositionTable* source_positions) {
// Create a TF graph during decoding.
WasmGraphBuilder builder(env, mcgraph->zone(), mcgraph, func_body.sig,
                         source_positions);
auto* allocator = wasm::GetWasmEngine()->allocator();
wasm::VoidResult graph_construction_result = wasm::BuildTFGraph(
    allocator, env->enabled_features, env->module, &builder, detected,
    func_body, loop_infos, node_origins, func_index, wasm::kRegularFunction);
if (graph_construction_result.failed()) {
  if (FLAG_trace_wasm_compiler) {
    StdoutStream{} << "Compilation failed: "
                   << graph_construction_result.error().message()
                   << std::endl;
  }
  return false;
}

auto sig = CreateMachineSignature(mcgraph->zone(), func_body.sig,
                                  WasmGraphBuilder::kCalledFromWasm);
builder.LowerInt64(sig);

return true;
8400}

8402base::Vector<const char> GetDebugName(Zone* zone,
                                    const wasm::WasmModule* module,
                                    const wasm::WireBytesStorage* wire_bytes,
                                    int index) {
base::Optional<wasm::ModuleWireBytes> module_bytes =
    wire_bytes->GetModuleBytes();
if (module_bytes.has_value() &&
    (FLAG_trace_turbo || FLAG_trace_turbo_scheduled ||
     FLAG_trace_turbo_graph || FLAG_print_wasm_code)) {
  wasm::WireBytesRef name = module->lazily_generated_names.LookupFunctionName(
      module_bytes.value(), index);
  if (!name.is_empty()) {
    int name_len = name.length();
    char* index_name = zone->NewArray<char>(name_len);
    memcpy(index_name, module_bytes->start() + name.offset(), name_len);
    return base::Vector<const char>(index_name, name_len);
  }
}

constexpr int kBufferLength = 24;

base::EmbeddedVector<char, kBufferLength> name_vector;
int name_len = SNPrintF(name_vector, "wasm-function#%d", index);
DCHECK(name_len > 0 && name_len < name_vector.length())((void) 0);

char* index_name = zone->NewArray<char>(name_len);
memcpy(index_name, name_vector.begin(), name_len);
return base::Vector<const char>(index_name, name_len);
8430}

8432}  // namespace

8434wasm::WasmCompilationResult ExecuteTurbofanWasmCompilation(
  wasm::CompilationEnv* env, const wasm::WireBytesStorage* wire_byte_storage,
  const wasm::FunctionBody& func_body, int func_index, Counters* counters,
  wasm::WasmFeatures* detected) {
// Check that we do not accidentally compile a Wasm function to TurboFan if
// --liftoff-only is set.
DCHECK(!FLAG_liftoff_only)((void) 0);

TRACE_EVENT2(TRACE_DISABLED_BY_DEFAULT("v8.wasm.detailed"),static v8::base::AtomicWord trace_event_unique_atomic8444 = 0
; const uint8_t* trace_event_unique_category_group_enabled8444
; trace_event_unique_category_group_enabled8444 = reinterpret_cast
<const uint8_t*>(v8::base::Relaxed_Load(&(trace_event_unique_atomic8444
))); if (!trace_event_unique_category_group_enabled8444) { trace_event_unique_category_group_enabled8444
 = v8::internal::tracing::TraceEventHelper::GetTracingController
() ->GetCategoryGroupEnabled("disabled-by-default-" "v8.wasm.detailed"
); v8::base::Relaxed_Store(&(trace_event_unique_atomic8444
), (reinterpret_cast<v8::base::AtomicWord>( trace_event_unique_category_group_enabled8444
))); };; v8::internal::tracing::ScopedTracer trace_event_unique_tracer8444
; if (v8::base::Relaxed_Load(reinterpret_cast<const v8::base
::Atomic8*>( trace_event_unique_category_group_enabled8444
)) & (kEnabledForRecording_CategoryGroupEnabledFlags | kEnabledForEventCallback_CategoryGroupEnabledFlags
)) { uint64_t h = v8::internal::tracing::AddTraceEvent( ('X')
, trace_event_unique_category_group_enabled8444, "wasm.CompileTopTier"
, v8::internal::tracing::kGlobalScope, v8::internal::tracing::
kNoId, v8::internal::tracing::kNoId, (static_cast<unsigned
 int>(0)), "func_index", func_index, "body_size", func_body
.end - func_body.start); trace_event_unique_tracer8444 .Initialize
(trace_event_unique_category_group_enabled8444, "wasm.CompileTopTier"
, h); }
             "wasm.CompileTopTier", "func_index", func_index, "body_size",static v8::base::AtomicWord trace_event_unique_atomic8444 = 0
; const uint8_t* trace_event_unique_category_group_enabled8444
; trace_event_unique_category_group_enabled8444 = reinterpret_cast
<const uint8_t*>(v8::base::Relaxed_Load(&(trace_event_unique_atomic8444
))); if (!trace_event_unique_category_group_enabled8444) { trace_event_unique_category_group_enabled8444
 = v8::internal::tracing::TraceEventHelper::GetTracingController
() ->GetCategoryGroupEnabled("disabled-by-default-" "v8.wasm.detailed"
); v8::base::Relaxed_Store(&(trace_event_unique_atomic8444
), (reinterpret_cast<v8::base::AtomicWord>( trace_event_unique_category_group_enabled8444
))); };; v8::internal::tracing::ScopedTracer trace_event_unique_tracer8444
; if (v8::base::Relaxed_Load(reinterpret_cast<const v8::base
::Atomic8*>( trace_event_unique_category_group_enabled8444
)) & (kEnabledForRecording_CategoryGroupEnabledFlags | kEnabledForEventCallback_CategoryGroupEnabledFlags
)) { uint64_t h = v8::internal::tracing::AddTraceEvent( ('X')
, trace_event_unique_category_group_enabled8444, "wasm.CompileTopTier"
, v8::internal::tracing::kGlobalScope, v8::internal::tracing::
kNoId, v8::internal::tracing::kNoId, (static_cast<unsigned
 int>(0)), "func_index", func_index, "body_size", func_body
.end - func_body.start); trace_event_unique_tracer8444 .Initialize
(trace_event_unique_category_group_enabled8444, "wasm.CompileTopTier"
, h); }
             func_body.end - func_body.start)static v8::base::AtomicWord trace_event_unique_atomic8444 = 0
; const uint8_t* trace_event_unique_category_group_enabled8444
; trace_event_unique_category_group_enabled8444 = reinterpret_cast
<const uint8_t*>(v8::base::Relaxed_Load(&(trace_event_unique_atomic8444
))); if (!trace_event_unique_category_group_enabled8444) { trace_event_unique_category_group_enabled8444
 = v8::internal::tracing::TraceEventHelper::GetTracingController
() ->GetCategoryGroupEnabled("disabled-by-default-" "v8.wasm.detailed"
); v8::base::Relaxed_Store(&(trace_event_unique_atomic8444
), (reinterpret_cast<v8::base::AtomicWord>( trace_event_unique_category_group_enabled8444
))); };; v8::internal::tracing::ScopedTracer trace_event_unique_tracer8444
; if (v8::base::Relaxed_Load(reinterpret_cast<const v8::base
::Atomic8*>( trace_event_unique_category_group_enabled8444
)) & (kEnabledForRecording_CategoryGroupEnabledFlags | kEnabledForEventCallback_CategoryGroupEnabledFlags
)) { uint64_t h = v8::internal::tracing::AddTraceEvent( ('X')
, trace_event_unique_category_group_enabled8444, "wasm.CompileTopTier"
, v8::internal::tracing::kGlobalScope, v8::internal::tracing::
kNoId, v8::internal::tracing::kNoId, (static_cast<unsigned
 int>(0)), "func_index", func_index, "body_size", func_body
.end - func_body.start); trace_event_unique_tracer8444 .Initialize
(trace_event_unique_category_group_enabled8444, "wasm.CompileTopTier"
, h); };
Zone zone(wasm::GetWasmEngine()->allocator(), ZONE_NAME__func__, kCompressGraphZone);
MachineGraph* mcgraph = zone.New<MachineGraph>(
    zone.New<Graph>(&zone), zone.New<CommonOperatorBuilder>(&zone),
    zone.New<MachineOperatorBuilder>(
        &zone, MachineType::PointerRepresentation(),
        InstructionSelector::SupportedMachineOperatorFlags(),
        InstructionSelector::AlignmentRequirements()));

OptimizedCompilationInfo info(
    GetDebugName(&zone, env->module, wire_byte_storage, func_index), &zone,
    CodeKind::WASM_FUNCTION);
if (env->runtime_exception_support) {
  info.set_wasm_runtime_exception_support();
}

if (FLAG_experimental_wasm_gc) info.set_allocation_folding();

if (info.trace_turbo_json()) {
  TurboCfgFile tcf;
  tcf << AsC1VCompilation(&info);
}

NodeOriginTable* node_origins =
    info.trace_turbo_json() ? zone.New<NodeOriginTable>(mcgraph->graph())
                            : nullptr;
SourcePositionTable* source_positions =
    mcgraph->zone()->New<SourcePositionTable>(mcgraph->graph());

std::vector<WasmLoopInfo> loop_infos;

wasm::WasmFeatures unused_detected_features;
if (!detected) detected = &unused_detected_features;
if (!BuildGraphForWasmFunction(env, func_body, func_index, detected, mcgraph,
                               &loop_infos, node_origins, source_positions)) {
  return wasm::WasmCompilationResult{};
}

if (node_origins) {
  node_origins->AddDecorator();
}

// Run the compiler pipeline to generate machine code.
auto call_descriptor = GetWasmCallDescriptor(&zone, func_body.sig);
if (mcgraph->machine()->Is32()) {
  call_descriptor = GetI32WasmCallDescriptor(&zone, call_descriptor);
}

if (ContainsSimd(func_body.sig) && !CpuFeatures::SupportsWasmSimd128()) {
  // Fail compilation if hardware does not support SIMD.
  return wasm::WasmCompilationResult{};
}

Pipeline::GenerateCodeForWasmFunction(
    &info, env, wire_byte_storage, mcgraph, call_descriptor, source_positions,
    node_origins, func_body, env->module, func_index, &loop_infos);

if (counters) {
  int zone_bytes =
      static_cast<int>(mcgraph->graph()->zone()->allocation_size());
  counters->wasm_compile_function_peak_memory_bytes()->AddSample(zone_bytes);
  if (func_body.end - func_body.start >= 100 * KB) {
    counters->wasm_compile_huge_function_peak_memory_bytes()->AddSample(
        zone_bytes);
  }
}
// If we tiered up only one function for debugging, dump statistics
// immediately.
if (V8_UNLIKELY(FLAG_turbo_stats_wasm && FLAG_wasm_tier_up_filter >= 0)(__builtin_expect(!!(FLAG_turbo_stats_wasm && FLAG_wasm_tier_up_filter
 >= 0), 0))) {
  wasm::GetWasmEngine()->DumpTurboStatistics();
}
auto result = info.ReleaseWasmCompilationResult();
CHECK_NOT_NULL(result)do { if ((__builtin_expect(!!(!((result) != nullptr)), 0))) {
 V8_Fatal("Check failed: %s.", "(result) != nullptr"); } } while
 (false);  // Compilation expected to succeed.
DCHECK_EQ(wasm::ExecutionTier::kTurbofan, result->result_tier)((void) 0);
return std::move(*result);
8519}

8521namespace {
8522// Helper for allocating either an GP or FP reg, or the next stack slot.
8523class LinkageLocationAllocator {
public:
template <size_t kNumGpRegs, size_t kNumFpRegs>
constexpr LinkageLocationAllocator(const Register (&gp)[kNumGpRegs],
                                   const DoubleRegister (&fp)[kNumFpRegs],
                                   int slot_offset)
    : allocator_(wasm::LinkageAllocator(gp, fp)), slot_offset_(slot_offset) {}

LinkageLocation Next(MachineRepresentation rep) {
  MachineType type = MachineType::TypeForRepresentation(rep);
  if (IsFloatingPoint(rep)) {
    if (allocator_.CanAllocateFP(rep)) {
      int reg_code = allocator_.NextFpReg(rep);
      return LinkageLocation::ForRegister(reg_code, type);
    }
  } else if (allocator_.CanAllocateGP()) {
    int reg_code = allocator_.NextGpReg();
    return LinkageLocation::ForRegister(reg_code, type);
  }
  // Cannot use register; use stack slot.
  int index = -1 - (slot_offset_ + allocator_.NextStackSlot(rep));
  return LinkageLocation::ForCallerFrameSlot(index, type);
}

int NumStackSlots() const { return allocator_.NumStackSlots(); }
void EndSlotArea() { allocator_.EndSlotArea(); }

private:
wasm::LinkageAllocator allocator_;
// Since params and returns are in different stack frames, we must allocate
// them separately. Parameter slots don't need an offset, but return slots
// must be offset to just before the param slots, using this |slot_offset_|.
int slot_offset_;
8556};

8558LocationSignature* BuildLocations(Zone* zone, const wasm::FunctionSig* fsig,
                                bool extra_callable_param,
                                int* parameter_slots, int* return_slots) {
int extra_params = extra_callable_param ? 2 : 1;
LocationSignature::Builder locations(zone, fsig->return_count(),
                                     fsig->parameter_count() + extra_params);

// Add register and/or stack parameter(s).
LinkageLocationAllocator params(
    wasm::kGpParamRegisters, wasm::kFpParamRegisters, 0 /* no slot offset */);

// The instance object.
locations.AddParam(params.Next(MachineRepresentation::kTaggedPointer));
const size_t param_offset = 1;  // Actual params start here.

// Parameters are separated into two groups (first all untagged, then all
// tagged parameters). This allows for easy iteration of tagged parameters
// during frame iteration.
const size_t parameter_count = fsig->parameter_count();
for (size_t i = 0; i < parameter_count; i++) {
  MachineRepresentation param = fsig->GetParam(i).machine_representation();
  // Skip tagged parameters (e.g. any-ref).
  if (IsAnyTagged(param)) continue;
  auto l = params.Next(param);
  locations.AddParamAt(i + param_offset, l);
}

// End the untagged area, so tagged slots come after.
params.EndSlotArea();

for (size_t i = 0; i < parameter_count; i++) {
  MachineRepresentation param = fsig->GetParam(i).machine_representation();
  // Skip untagged parameters.
  if (!IsAnyTagged(param)) continue;
  auto l = params.Next(param);
  locations.AddParamAt(i + param_offset, l);
}

// Import call wrappers have an additional (implicit) parameter, the callable.
// For consistency with JS, we use the JSFunction register.
if (extra_callable_param) {
  locations.AddParam(LinkageLocation::ForRegister(
      kJSFunctionRegister.code(), MachineType::TaggedPointer()));
}

*parameter_slots = AddArgumentPaddingSlots(params.NumStackSlots());

// Add return location(s).
LinkageLocationAllocator rets(wasm::kGpReturnRegisters,
                              wasm::kFpReturnRegisters, *parameter_slots);

const size_t return_count = locations.return_count_;
for (size_t i = 0; i < return_count; i++) {
  MachineRepresentation ret = fsig->GetReturn(i).machine_representation();
  locations.AddReturn(rets.Next(ret));
}

*return_slots = rets.NumStackSlots();

return locations.Build();
8618}
8619}  // namespace

8621// General code uses the above configuration data.
8622CallDescriptor* GetWasmCallDescriptor(Zone* zone, const wasm::FunctionSig* fsig,
                                    WasmCallKind call_kind,
                                    bool need_frame_state) {
// The extra here is to accomodate the instance object as first parameter
// and, when specified, the additional callable.
bool extra_callable_param =
    call_kind == kWasmImportWrapper || call_kind == kWasmCapiFunction;

int parameter_slots;
int return_slots;
LocationSignature* location_sig = BuildLocations(
    zone, fsig, extra_callable_param, &parameter_slots, &return_slots);

const RegList kCalleeSaveRegisters;
const DoubleRegList kCalleeSaveFPRegisters;

// The target for wasm calls is always a code object.
MachineType target_type = MachineType::Pointer();
LinkageLocation target_loc = LinkageLocation::ForAnyRegister(target_type);

CallDescriptor::Kind descriptor_kind;
if (call_kind == kWasmFunction) {
  descriptor_kind = CallDescriptor::kCallWasmFunction;
} else if (call_kind == kWasmImportWrapper) {
  descriptor_kind = CallDescriptor::kCallWasmImportWrapper;
} else {
  DCHECK_EQ(call_kind, kWasmCapiFunction)((void) 0);
  descriptor_kind = CallDescriptor::kCallWasmCapiFunction;
}

CallDescriptor::Flags flags = need_frame_state
                                  ? CallDescriptor::kNeedsFrameState
                                  : CallDescriptor::kNoFlags;
return zone->New<CallDescriptor>(       // --
    descriptor_kind,                    // kind
    target_type,                        // target MachineType
    target_loc,                         // target location
    location_sig,                       // location_sig
    parameter_slots,                    // parameter slot count
    compiler::Operator::kNoProperties,  // properties
    kCalleeSaveRegisters,               // callee-saved registers
    kCalleeSaveFPRegisters,             // callee-saved fp regs
    flags,                              // flags
    "wasm-call",                        // debug name
    StackArgumentOrder::kDefault,       // order of the arguments in the stack
    fsig,                               // signature
    RegList{},                          // allocatable registers
    return_slots);                      // return slot count
8670}

8672namespace {
8673const wasm::FunctionSig* ReplaceTypeInSig(Zone* zone,
                                        const wasm::FunctionSig* sig,
                                        wasm::ValueType from,
                                        wasm::ValueType to,
                                        size_t num_replacements) {
size_t param_occurences =
    std::count(sig->parameters().begin(), sig->parameters().end(), from);
size_t return_occurences =
    std::count(sig->returns().begin(), sig->returns().end(), from);
if (param_occurences == 0 && return_occurences == 0) return sig;

wasm::FunctionSig::Builder builder(
    zone, sig->return_count() + return_occurences * (num_replacements - 1),
    sig->parameter_count() + param_occurences * (num_replacements - 1));

for (wasm::ValueType ret : sig->returns()) {
  if (ret == from) {
    for (size_t i = 0; i < num_replacements; i++) builder.AddReturn(to);
  } else {
    builder.AddReturn(ret);
  }
}

for (wasm::ValueType param : sig->parameters()) {
  if (param == from) {
    for (size_t i = 0; i < num_replacements; i++) builder.AddParam(to);
  } else {
    builder.AddParam(param);
  }
}

return builder.Build();
8705}

8707CallDescriptor* ReplaceTypeInCallDescriptorWith(
  Zone* zone, const CallDescriptor* call_descriptor, size_t num_replacements,
  wasm::ValueType input_type, wasm::ValueType output_type) {
if (call_descriptor->wasm_sig() == nullptr) {
  // This happens for builtins calls. They need no replacements anyway.
8712#if DEBUG
  for (size_t i = 0; i < call_descriptor->ParameterCount(); i++) {
    DCHECK_NE(call_descriptor->GetParameterType(i),((void) 0)
              input_type.machine_type())((void) 0);
  }
  for (size_t i = 0; i < call_descriptor->ReturnCount(); i++) {
    DCHECK_NE(call_descriptor->GetReturnType(i), input_type.machine_type())((void) 0);
  }
8720#endif
  return const_cast<CallDescriptor*>(call_descriptor);
}
const wasm::FunctionSig* sig =
    ReplaceTypeInSig(zone, call_descriptor->wasm_sig(), input_type,
                     output_type, num_replacements);
// If {ReplaceTypeInSig} took the early fast path, there's nothing to do.
if (sig == call_descriptor->wasm_sig()) {
  return const_cast<CallDescriptor*>(call_descriptor);
}

// The last parameter may be the special callable parameter. In that case we
// have to preserve it as the last parameter, i.e. we allocate it in the new
// location signature again in the same register.
bool extra_callable_param =
    (call_descriptor->GetInputLocation(call_descriptor->InputCount() - 1) ==
     LinkageLocation::ForRegister(kJSFunctionRegister.code(),
                                  MachineType::TaggedPointer()));

int parameter_slots;
int return_slots;
LocationSignature* location_sig = BuildLocations(
    zone, sig, extra_callable_param, &parameter_slots, &return_slots);

return zone->New<CallDescriptor>(               // --
    call_descriptor->kind(),                    // kind
    call_descriptor->GetInputType(0),           // target MachineType
    call_descriptor->GetInputLocation(0),       // target location
    location_sig,                               // location_sig
    parameter_slots,                            // parameter slot count
    call_descriptor->properties(),              // properties
    call_descriptor->CalleeSavedRegisters(),    // callee-saved registers
    call_descriptor->CalleeSavedFPRegisters(),  // callee-saved fp regs
    call_descriptor->flags(),                   // flags
    call_descriptor->debug_name(),              // debug name
    call_descriptor->GetStackArgumentOrder(),   // stack order
    sig,                                        // signature
    call_descriptor->AllocatableRegisters(),    // allocatable registers
    return_slots);                              // return slot count
8759}
8760}  // namespace

8762// static
8763const wasm::FunctionSig* WasmGraphBuilder::Int64LoweredSig(
  Zone* zone, const wasm::FunctionSig* sig) {
return (kSystemPointerSize == 4)
           ? ReplaceTypeInSig(zone, sig, wasm::kWasmI64, wasm::kWasmI32, 2)
           : sig;
8768}

8770CallDescriptor* GetI32WasmCallDescriptor(
  Zone* zone, const CallDescriptor* call_descriptor) {
return ReplaceTypeInCallDescriptorWith(zone, call_descriptor, 2,
                                       wasm::kWasmI64, wasm::kWasmI32);
8774}

8776AssemblerOptions WasmAssemblerOptions() {
AssemblerOptions options;
// Relocation info required to serialize {WasmCode} for proper functions.
options.record_reloc_info_for_serialization = true;
options.enable_root_relative_access = false;
return options;
8782}

8784AssemblerOptions WasmStubAssemblerOptions() {
AssemblerOptions options;
// Relocation info not necessary because stubs are not serialized.
options.record_reloc_info_for_serialization = false;
options.enable_root_relative_access = false;
return options;
8790}

8792#undef FATAL_UNSUPPORTED_OPCODE
8793#undef WASM_INSTANCE_OBJECT_SIZE
8794#undef LOAD_INSTANCE_FIELD
8795#undef LOAD_MUTABLE_INSTANCE_FIELD
8796#undef LOAD_ROOT

8798}  // namespace compiler
8799}  // namespace internal
8800}  // namespace v8