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v8/test/unittests/compiler/int64-lowering-unittest.cc
Manos Koukoutos 02ac71e256 [turbofan] Disallow floating control in wasm 
Loop unrolling did not work properly with floating control. Seeing as
very few spots in the wasm compiler introduced floating control, we
decided to disallow it altogether.
Changes:
- When lowering 64-bit rol/ror/clz/ctz in 32-bit platforms, we use a
  diamond operator, which used to introduce floating control. This CL
  adds a control edge to these operators so that the diamond can be
  chained to that control instead.
- During loop analysis, as an additional safety check, we check that the
  explored loop does not have floating control. Exceptionally, floating
  control pointing directly do start() is allowed.
- Change wasm-compiler so that generated floating projections point to
  start() even after stack check patch-in.

Bug: chromium:1184929, v8:11298
Change-Id: I1ee063f5250037ae6c84d2f16b0bd8fff3923117
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2876851
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74527}
2021-05-12 15:26:33 +00:00

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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/compiler/int64-lowering.h"
#include "src/codegen/interface-descriptors-inl.h"
#include "src/codegen/machine-type.h"
#include "src/codegen/signature.h"
#include "src/compiler/common-operator.h"
#include "src/compiler/linkage.h"
#include "src/compiler/machine-operator.h"
#include "src/compiler/node-properties.h"
#include "src/compiler/node.h"
#include "src/compiler/wasm-compiler.h"
#include "src/wasm/value-type.h"
#include "src/wasm/wasm-module.h"
#include "test/unittests/compiler/graph-unittest.h"
#include "test/unittests/compiler/node-test-utils.h"
#include "testing/gmock-support.h"
using testing::AllOf;
using testing::Capture;
using testing::CaptureEq;
namespace v8 {
namespace internal {
namespace compiler {
class Int64LoweringTest : public GraphTest {
public:
Int64LoweringTest()
: GraphTest(),
machine_(zone(), MachineRepresentation::kWord32,
MachineOperatorBuilder::Flag::kAllOptionalOps),
simplified_(zone()) {
value_[0] = 0x1234567890ABCDEF;
value_[1] = 0x1EDCBA098765432F;
value_[2] = 0x1133557799886644;
}
MachineOperatorBuilder* machine() { return &machine_; }
SimplifiedOperatorBuilder* simplified() { return &simplified_; }
void LowerGraph(Node* node, Signature<MachineRepresentation>* signature) {
Node* zero = graph()->NewNode(common()->Int32Constant(0));
Node* ret = graph()->NewNode(common()->Return(), zero, node,
graph()->start(), graph()->start());
NodeProperties::MergeControlToEnd(graph(), common(), ret);
Int64Lowering lowering(graph(), machine(), common(), simplified(), zone(),
signature);
lowering.LowerGraph();
}
void LowerGraphWithSpecialCase(
Node* node, std::unique_ptr<Int64LoweringSpecialCase> special_case,
MachineRepresentation rep) {
Node* zero = graph()->NewNode(common()->Int32Constant(0));
Node* ret = graph()->NewNode(common()->Return(), zero, node,
graph()->start(), graph()->start());
NodeProperties::MergeControlToEnd(graph(), common(), ret);
// Create a signature for the outer wasm<>js call; for these tests we focus
// on lowering the special cases rather than the wrapper node at the
// JavaScript boundaries.
Signature<MachineRepresentation>::Builder sig_builder(zone(), 1, 0);
sig_builder.AddReturn(rep);
Int64Lowering lowering(graph(), machine(), common(), simplified(), zone(),
sig_builder.Build(), std::move(special_case));
lowering.LowerGraph();
}
void LowerGraph(Node* node, MachineRepresentation return_type,
MachineRepresentation rep = MachineRepresentation::kWord32,
int num_params = 0) {
Signature<MachineRepresentation>::Builder sig_builder(zone(), 1,
num_params);
sig_builder.AddReturn(return_type);
for (int i = 0; i < num_params; i++) {
sig_builder.AddParam(rep);
}
LowerGraph(node, sig_builder.Build());
}
void CompareCallDescriptors(const CallDescriptor* lhs,
const CallDescriptor* rhs) {
EXPECT_THAT(lhs->CalleeSavedFPRegisters(), rhs->CalleeSavedFPRegisters());
EXPECT_THAT(lhs->CalleeSavedRegisters(), rhs->CalleeSavedRegisters());
EXPECT_THAT(lhs->FrameStateCount(), rhs->FrameStateCount());
EXPECT_THAT(lhs->InputCount(), rhs->InputCount());
for (size_t i = 0; i < lhs->InputCount(); i++) {
EXPECT_THAT(lhs->GetInputLocation(i), rhs->GetInputLocation(i));
EXPECT_THAT(lhs->GetInputType(i), rhs->GetInputType(i));
}
EXPECT_THAT(lhs->ReturnCount(), rhs->ReturnCount());
for (size_t i = 0; i < lhs->ReturnCount(); i++) {
EXPECT_THAT(lhs->GetReturnLocation(i), rhs->GetReturnLocation(i));
EXPECT_THAT(lhs->GetReturnType(i), rhs->GetReturnType(i));
}
EXPECT_THAT(lhs->flags(), rhs->flags());
EXPECT_THAT(lhs->kind(), rhs->kind());
}
int64_t value(int i) { return value_[i]; }
int32_t low_word_value(int i) {
return static_cast<int32_t>(value_[i] & 0xFFFFFFFF);
}
int32_t high_word_value(int i) {
return static_cast<int32_t>(value_[i] >> 32);
}
void TestComparison(
const Operator* op,
Matcher<Node*> (*high_word_matcher)(const Matcher<Node*>& lhs_matcher,
const Matcher<Node*>& rhs_matcher),
Matcher<Node*> (*low_word_matcher)(const Matcher<Node*>& lhs_matcher,
const Matcher<Node*>& rhs_matcher)) {
LowerGraph(
graph()->NewNode(op, Int64Constant(value(0)), Int64Constant(value(1))),
MachineRepresentation::kWord32);
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn(IsWord32Or(
high_word_matcher(IsInt32Constant(high_word_value(0)),
IsInt32Constant(high_word_value(1))),
IsWord32And(
IsWord32Equal(IsInt32Constant(high_word_value(0)),
IsInt32Constant(high_word_value(1))),
low_word_matcher(IsInt32Constant(low_word_value(0)),
IsInt32Constant(low_word_value(1))))),
start(), start()));
}
private:
MachineOperatorBuilder machine_;
SimplifiedOperatorBuilder simplified_;
int64_t value_[3];
};
TEST_F(Int64LoweringTest, Int64Constant) {
LowerGraph(Int64Constant(value(0)), MachineRepresentation::kWord64);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsInt32Constant(low_word_value(0)),
IsInt32Constant(high_word_value(0)), start(), start()));
}
#if defined(V8_TARGET_LITTLE_ENDIAN)
#define LOAD_VERIFY(kLoad) \
Matcher<Node*> high_word_load_matcher = \
Is##kLoad(MachineType::Int32(), IsInt32Constant(base), \
IsInt32Add(IsInt32Constant(index), IsInt32Constant(0x4)), \
start(), start()); \
\
EXPECT_THAT( \
graph()->end()->InputAt(1), \
IsReturn2( \
Is##kLoad(MachineType::Int32(), IsInt32Constant(base), \
IsInt32Constant(index), \
AllOf(CaptureEq(&high_word_load), high_word_load_matcher), \
start()), \
AllOf(CaptureEq(&high_word_load), high_word_load_matcher), start(), \
start()));
#elif defined(V8_TARGET_BIG_ENDIAN)
#define LOAD_VERIFY(kLoad) \
Matcher<Node*> high_word_load_matcher = \
Is##kLoad(MachineType::Int32(), IsInt32Constant(base), \
IsInt32Constant(index), start(), start()); \
\
EXPECT_THAT( \
graph()->end()->InputAt(1), \
IsReturn2( \
Is##kLoad(MachineType::Int32(), IsInt32Constant(base), \
IsInt32Add(IsInt32Constant(index), IsInt32Constant(0x4)), \
AllOf(CaptureEq(&high_word_load), high_word_load_matcher), \
start()), \
AllOf(CaptureEq(&high_word_load), high_word_load_matcher), start(), \
start()));
#endif
#define INT64_LOAD_LOWERING(kLoad, param, builder) \
int32_t base = 0x1234; \
int32_t index = 0x5678; \
\
LowerGraph(graph()->NewNode(builder()->kLoad(param), Int32Constant(base), \
Int32Constant(index), start(), start()), \
MachineRepresentation::kWord64); \
\
Capture<Node*> high_word_load; \
LOAD_VERIFY(kLoad)
TEST_F(Int64LoweringTest, Int64Load) {
INT64_LOAD_LOWERING(Load, MachineType::Int64(), machine);
}
TEST_F(Int64LoweringTest, UnalignedInt64Load) {
INT64_LOAD_LOWERING(UnalignedLoad, MachineType::Int64(), machine);
}
TEST_F(Int64LoweringTest, Int64LoadFromObject) {
INT64_LOAD_LOWERING(LoadFromObject,
ObjectAccess(MachineType::Int64(), kNoWriteBarrier),
simplified);
}
TEST_F(Int64LoweringTest, Int64LoadImmutable) {
int32_t base = 0x1234;
int32_t index = 0x5678;
LowerGraph(graph()->NewNode(machine()->LoadImmutable(MachineType::Int64()),
Int32Constant(base), Int32Constant(index)),
MachineRepresentation::kWord64);
Capture<Node*> high_word_load;
#if defined(V8_TARGET_LITTLE_ENDIAN)
Matcher<Node*> high_word_load_matcher =
IsLoadImmutable(MachineType::Int32(), IsInt32Constant(base),
IsInt32Add(IsInt32Constant(index), IsInt32Constant(0x4)));
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn2(IsLoadImmutable(MachineType::Int32(), IsInt32Constant(base),
IsInt32Constant(index)),
AllOf(CaptureEq(&high_word_load), high_word_load_matcher),
start(), start()));
#elif defined(V8_TARGET_BIG_ENDIAN)
Matcher<Node*> high_word_load_matcher = IsLoadImmutable(
MachineType::Int32(), IsInt32Constant(base), IsInt32Constant(index));
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn2(IsLoadImmutable(
MachineType::Int32(), IsInt32Constant(base),
IsInt32Add(IsInt32Constant(index), IsInt32Constant(0x4))),
AllOf(CaptureEq(&high_word_load), high_word_load_matcher),
start(), start()));
#endif
}
#if defined(V8_TARGET_LITTLE_ENDIAN)
#define STORE_VERIFY(kStore, kRep) \
EXPECT_THAT( \
graph()->end()->InputAt(1), \
IsReturn(IsInt32Constant(return_value), \
Is##kStore( \
kRep, IsInt32Constant(base), IsInt32Constant(index), \
IsInt32Constant(low_word_value(0)), \
Is##kStore( \
kRep, IsInt32Constant(base), \
IsInt32Add(IsInt32Constant(index), IsInt32Constant(4)), \
IsInt32Constant(high_word_value(0)), start(), start()), \
start()), \
start()));
#elif defined(V8_TARGET_BIG_ENDIAN)
#define STORE_VERIFY(kStore, kRep) \
EXPECT_THAT( \
graph()->end()->InputAt(1), \
IsReturn(IsInt32Constant(return_value), \
Is##kStore( \
kRep, IsInt32Constant(base), \
IsInt32Add(IsInt32Constant(index), IsInt32Constant(4)), \
IsInt32Constant(low_word_value(0)), \
Is##kStore( \
kRep, IsInt32Constant(base), IsInt32Constant(index), \
IsInt32Constant(high_word_value(0)), start(), start()), \
start()), \
start()));
#endif
#define INT64_STORE_LOWERING(kStore, kRep32, kRep64, builder) \
int32_t base = 1111; \
int32_t index = 2222; \
int32_t return_value = 0x5555; \
\
Signature<MachineRepresentation>::Builder sig_builder(zone(), 1, 0); \
sig_builder.AddReturn(MachineRepresentation::kWord32); \
\
Node* store = graph()->NewNode(builder()->kStore(kRep64), \
Int32Constant(base), Int32Constant(index), \
Int64Constant(value(0)), start(), start()); \
\
Node* zero = graph()->NewNode(common()->Int32Constant(0)); \
Node* ret = graph()->NewNode(common()->Return(), zero, \
Int32Constant(return_value), store, start()); \
\
NodeProperties::MergeControlToEnd(graph(), common(), ret); \
\
Int64Lowering lowering(graph(), machine(), common(), simplified(), zone(), \
sig_builder.Build()); \
lowering.LowerGraph(); \
\
STORE_VERIFY(kStore, kRep32)
TEST_F(Int64LoweringTest, Int64Store) {
const StoreRepresentation rep64(MachineRepresentation::kWord64,
WriteBarrierKind::kNoWriteBarrier);
const StoreRepresentation rep32(MachineRepresentation::kWord32,
WriteBarrierKind::kNoWriteBarrier);
INT64_STORE_LOWERING(Store, rep32, rep64, machine);
}
TEST_F(Int64LoweringTest, Int32Store) {
const StoreRepresentation rep32(MachineRepresentation::kWord32,
WriteBarrierKind::kNoWriteBarrier);
int32_t base = 1111;
int32_t index = 2222;
int32_t return_value = 0x5555;
Signature<MachineRepresentation>::Builder sig_builder(zone(), 1, 0);
sig_builder.AddReturn(MachineRepresentation::kWord32);
Node* store = graph()->NewNode(machine()->Store(rep32), Int32Constant(base),
Int32Constant(index), Int64Constant(value(0)),
start(), start());
Node* zero = graph()->NewNode(common()->Int32Constant(0));
Node* ret = graph()->NewNode(common()->Return(), zero,
Int32Constant(return_value), store, start());
NodeProperties::MergeControlToEnd(graph(), common(), ret);
Int64Lowering lowering(graph(), machine(), common(), simplified(), zone(),
sig_builder.Build());
lowering.LowerGraph();
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn(IsInt32Constant(return_value),
IsStore(rep32, IsInt32Constant(base), IsInt32Constant(index),
IsInt32Constant(low_word_value(0)), start(), start()),
start()));
}
TEST_F(Int64LoweringTest, Int64UnalignedStore) {
const UnalignedStoreRepresentation rep64(MachineRepresentation::kWord64);
const UnalignedStoreRepresentation rep32(MachineRepresentation::kWord32);
INT64_STORE_LOWERING(UnalignedStore, rep32, rep64, machine);
}
TEST_F(Int64LoweringTest, Int64StoreToObject) {
const ObjectAccess access64(MachineType::Int64(), kNoWriteBarrier);
const ObjectAccess access32(MachineType::Int32(), kNoWriteBarrier);
INT64_STORE_LOWERING(StoreToObject, access32, access64, simplified);
}
TEST_F(Int64LoweringTest, Int64And) {
LowerGraph(graph()->NewNode(machine()->Word64And(), Int64Constant(value(0)),
Int64Constant(value(1))),
MachineRepresentation::kWord64);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsWord32And(IsInt32Constant(low_word_value(0)),
IsInt32Constant(low_word_value(1))),
IsWord32And(IsInt32Constant(high_word_value(0)),
IsInt32Constant(high_word_value(1))),
start(), start()));
}
TEST_F(Int64LoweringTest, TruncateInt64ToInt32) {
LowerGraph(graph()->NewNode(machine()->TruncateInt64ToInt32(),
Int64Constant(value(0))),
MachineRepresentation::kWord32);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn(IsInt32Constant(low_word_value(0)), start(), start()));
}
TEST_F(Int64LoweringTest, Parameter) {
LowerGraph(Parameter(1), MachineRepresentation::kWord64,
MachineRepresentation::kWord64, 1);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsParameter(1), IsParameter(2), start(), start()));
}
TEST_F(Int64LoweringTest, Parameter2) {
Signature<MachineRepresentation>::Builder sig_builder(zone(), 1, 5);
sig_builder.AddReturn(MachineRepresentation::kWord32);
sig_builder.AddParam(MachineRepresentation::kWord32);
sig_builder.AddParam(MachineRepresentation::kWord64);
sig_builder.AddParam(MachineRepresentation::kFloat64);
sig_builder.AddParam(MachineRepresentation::kWord64);
sig_builder.AddParam(MachineRepresentation::kWord32);
int start_parameter = start()->op()->ValueOutputCount();
LowerGraph(Parameter(5), sig_builder.Build());
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn(IsParameter(7), start(), start()));
// The parameter of the start node should increase by 2, because we lowered
// two parameter nodes.
EXPECT_THAT(start()->op()->ValueOutputCount(), start_parameter + 2);
}
TEST_F(Int64LoweringTest, ParameterWithJSContextParam) {
Signature<MachineRepresentation>::Builder sig_builder(zone(), 0, 2);
sig_builder.AddParam(MachineRepresentation::kWord64);
sig_builder.AddParam(MachineRepresentation::kWord64);
auto sig = sig_builder.Build();
Node* js_context = graph()->NewNode(
common()->Parameter(Linkage::GetJSCallContextParamIndex(
static_cast<int>(sig->parameter_count()) + 1),
"%context"),
start());
LowerGraph(js_context, sig);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn(js_context, start(), start()));
}
TEST_F(Int64LoweringTest, ParameterWithJSClosureParam) {
Signature<MachineRepresentation>::Builder sig_builder(zone(), 0, 2);
sig_builder.AddParam(MachineRepresentation::kWord64);
sig_builder.AddParam(MachineRepresentation::kWord64);
auto sig = sig_builder.Build();
Node* js_closure = graph()->NewNode(
common()->Parameter(Linkage::kJSCallClosureParamIndex, "%closure"),
start());
LowerGraph(js_closure, sig);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn(js_closure, start(), start()));
}
// The following tests are only valid in 32-bit platforms, due to one of these
// two assumptions:
// - Pointers are 32 bit and therefore pointers do not get lowered.
// - 64-bit rol/ror/clz/ctz instructions have a control input.
// TODO(wasm): We can find an alternative to re-activate these tests.
#if V8_TARGET_ARCH_32_BIT
TEST_F(Int64LoweringTest, CallI64Return) {
int32_t function = 0x9999;
Node* context_address = Int32Constant(0);
wasm::FunctionSig::Builder sig_builder(zone(), 1, 0);
sig_builder.AddReturn(wasm::kWasmI64);
auto call_descriptor =
compiler::GetWasmCallDescriptor(zone(), sig_builder.Build());
LowerGraph(
graph()->NewNode(common()->Call(call_descriptor), Int32Constant(function),
context_address, start(), start()),
MachineRepresentation::kWord64);
Capture<Node*> call;
Matcher<Node*> call_matcher =
IsCall(testing::_, IsInt32Constant(function), start(), start());
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsProjection(0, AllOf(CaptureEq(&call), call_matcher)),
IsProjection(1, AllOf(CaptureEq(&call), call_matcher)),
start(), start()));
CompareCallDescriptors(
CallDescriptorOf(
graph()->end()->InputAt(1)->InputAt(1)->InputAt(0)->op()),
compiler::GetI32WasmCallDescriptor(zone(), call_descriptor));
}
TEST_F(Int64LoweringTest, CallI64Parameter) {
int32_t function = 0x9999;
Node* context_address = Int32Constant(0);
wasm::FunctionSig::Builder sig_builder(zone(), 1, 3);
sig_builder.AddReturn(wasm::kWasmI32);
sig_builder.AddParam(wasm::kWasmI64);
sig_builder.AddParam(wasm::kWasmI32);
sig_builder.AddParam(wasm::kWasmI64);
auto call_descriptor =
compiler::GetWasmCallDescriptor(zone(), sig_builder.Build());
LowerGraph(
graph()->NewNode(common()->Call(call_descriptor), Int32Constant(function),
context_address, Int64Constant(value(0)),
Int32Constant(low_word_value(1)),
Int64Constant(value(2)), start(), start()),
MachineRepresentation::kWord32);
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn(IsCall(testing::_, IsInt32Constant(function), context_address,
IsInt32Constant(low_word_value(0)),
IsInt32Constant(high_word_value(0)),
IsInt32Constant(low_word_value(1)),
IsInt32Constant(low_word_value(2)),
IsInt32Constant(high_word_value(2)), start(), start()),
start(), start()));
CompareCallDescriptors(
CallDescriptorOf(graph()->end()->InputAt(1)->InputAt(1)->op()),
compiler::GetI32WasmCallDescriptor(zone(), call_descriptor));
}
TEST_F(Int64LoweringTest, Int64Add) {
LowerGraph(graph()->NewNode(machine()->Int64Add(), Int64Constant(value(0)),
Int64Constant(value(1))),
MachineRepresentation::kWord64);
Capture<Node*> add;
Matcher<Node*> add_matcher = IsInt32PairAdd(
IsInt32Constant(low_word_value(0)), IsInt32Constant(high_word_value(0)),
IsInt32Constant(low_word_value(1)), IsInt32Constant(high_word_value(1)));
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsProjection(0, AllOf(CaptureEq(&add), add_matcher)),
IsProjection(1, AllOf(CaptureEq(&add), add_matcher)),
start(), start()));
}
TEST_F(Int64LoweringTest, I64Clz) {
LowerGraph(graph()->NewNode(machine()->Word64ClzLowerable(),
Int64Constant(value(0)), graph()->start()),
MachineRepresentation::kWord64);
Capture<Node*> branch_capture;
Matcher<Node*> branch_matcher = IsBranch(
IsWord32Equal(IsInt32Constant(high_word_value(0)), IsInt32Constant(0)),
start());
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn2(
IsPhi(MachineRepresentation::kWord32,
IsInt32Add(IsWord32Clz(IsInt32Constant(low_word_value(0))),
IsInt32Constant(32)),
IsWord32Clz(IsInt32Constant(high_word_value(0))),
IsMerge(
IsIfTrue(AllOf(CaptureEq(&branch_capture), branch_matcher)),
IsIfFalse(
AllOf(CaptureEq(&branch_capture), branch_matcher)))),
IsInt32Constant(0), start(), start()));
}
TEST_F(Int64LoweringTest, I64Ctz) {
LowerGraph(graph()->NewNode(machine()->Word64CtzLowerable().placeholder(),
Int64Constant(value(0)), graph()->start()),
MachineRepresentation::kWord64);
Capture<Node*> branch_capture;
Matcher<Node*> branch_matcher = IsBranch(
IsWord32Equal(IsInt32Constant(low_word_value(0)), IsInt32Constant(0)),
start());
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn2(
IsPhi(MachineRepresentation::kWord32,
IsInt32Add(IsWord32Ctz(IsInt32Constant(high_word_value(0))),
IsInt32Constant(32)),
IsWord32Ctz(IsInt32Constant(low_word_value(0))),
IsMerge(
IsIfTrue(AllOf(CaptureEq(&branch_capture), branch_matcher)),
IsIfFalse(
AllOf(CaptureEq(&branch_capture), branch_matcher)))),
IsInt32Constant(0), start(), start()));
}
TEST_F(Int64LoweringTest, I64Ror) {
LowerGraph(
graph()->NewNode(machine()->Word64RorLowerable(), Int64Constant(value(0)),
Parameter(0), graph()->start()),
MachineRepresentation::kWord64, MachineRepresentation::kWord64, 1);
Matcher<Node*> branch_lt32_matcher =
IsBranch(IsInt32LessThan(IsParameter(0), IsInt32Constant(32)), start());
Matcher<Node*> low_input_matcher = IsPhi(
MachineRepresentation::kWord32, IsInt32Constant(low_word_value(0)),
IsInt32Constant(high_word_value(0)),
IsMerge(IsIfTrue(branch_lt32_matcher), IsIfFalse(branch_lt32_matcher)));
Matcher<Node*> high_input_matcher = IsPhi(
MachineRepresentation::kWord32, IsInt32Constant(high_word_value(0)),
IsInt32Constant(low_word_value(0)),
IsMerge(IsIfTrue(branch_lt32_matcher), IsIfFalse(branch_lt32_matcher)));
Matcher<Node*> shift_matcher =
IsWord32And(IsParameter(0), IsInt32Constant(0x1F));
Matcher<Node*> bit_mask_matcher = IsWord32Xor(
IsWord32Shr(IsInt32Constant(-1), shift_matcher), IsInt32Constant(-1));
Matcher<Node*> inv_mask_matcher =
IsWord32Xor(bit_mask_matcher, IsInt32Constant(-1));
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn2(
IsWord32Or(IsWord32And(IsWord32Ror(low_input_matcher, shift_matcher),
inv_mask_matcher),
IsWord32And(IsWord32Ror(high_input_matcher, shift_matcher),
bit_mask_matcher)),
IsWord32Or(IsWord32And(IsWord32Ror(high_input_matcher, shift_matcher),
inv_mask_matcher),
IsWord32And(IsWord32Ror(low_input_matcher, shift_matcher),
bit_mask_matcher)),
start(), start()));
}
TEST_F(Int64LoweringTest, I64Ror_0) {
LowerGraph(
graph()->NewNode(machine()->Word64RorLowerable(), Int64Constant(value(0)),
Int32Constant(0), graph()->start()),
MachineRepresentation::kWord64);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsInt32Constant(low_word_value(0)),
IsInt32Constant(high_word_value(0)), start(), start()));
}
TEST_F(Int64LoweringTest, I64Ror_32) {
LowerGraph(
graph()->NewNode(machine()->Word64RorLowerable(), Int64Constant(value(0)),
Int32Constant(32), graph()->start()),
MachineRepresentation::kWord64);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsInt32Constant(high_word_value(0)),
IsInt32Constant(low_word_value(0)), start(), start()));
}
TEST_F(Int64LoweringTest, I64Ror_11) {
LowerGraph(
graph()->NewNode(machine()->Word64RorLowerable(), Int64Constant(value(0)),
Int32Constant(11), graph()->start()),
MachineRepresentation::kWord64);
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn2(IsWord32Or(IsWord32Shr(IsInt32Constant(low_word_value(0)),
IsInt32Constant(11)),
IsWord32Shl(IsInt32Constant(high_word_value(0)),
IsInt32Constant(21))),
IsWord32Or(IsWord32Shr(IsInt32Constant(high_word_value(0)),
IsInt32Constant(11)),
IsWord32Shl(IsInt32Constant(low_word_value(0)),
IsInt32Constant(21))),
start(), start()));
}
TEST_F(Int64LoweringTest, I64Ror_43) {
LowerGraph(
graph()->NewNode(machine()->Word64RorLowerable(), Int64Constant(value(0)),
Int32Constant(43), graph()->start()),
MachineRepresentation::kWord64);
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn2(IsWord32Or(IsWord32Shr(IsInt32Constant(high_word_value(0)),
IsInt32Constant(11)),
IsWord32Shl(IsInt32Constant(low_word_value(0)),
IsInt32Constant(21))),
IsWord32Or(IsWord32Shr(IsInt32Constant(low_word_value(0)),
IsInt32Constant(11)),
IsWord32Shl(IsInt32Constant(high_word_value(0)),
IsInt32Constant(21))),
start(), start()));
}
#endif
TEST_F(Int64LoweringTest, Int64Sub) {
LowerGraph(graph()->NewNode(machine()->Int64Sub(), Int64Constant(value(0)),
Int64Constant(value(1))),
MachineRepresentation::kWord64);
Capture<Node*> sub;
Matcher<Node*> sub_matcher = IsInt32PairSub(
IsInt32Constant(low_word_value(0)), IsInt32Constant(high_word_value(0)),
IsInt32Constant(low_word_value(1)), IsInt32Constant(high_word_value(1)));
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsProjection(0, AllOf(CaptureEq(&sub), sub_matcher)),
IsProjection(1, AllOf(CaptureEq(&sub), sub_matcher)),
start(), start()));
}
TEST_F(Int64LoweringTest, Int64Mul) {
LowerGraph(graph()->NewNode(machine()->Int64Mul(), Int64Constant(value(0)),
Int64Constant(value(1))),
MachineRepresentation::kWord64);
Capture<Node*> mul_capture;
Matcher<Node*> mul_matcher = IsInt32PairMul(
IsInt32Constant(low_word_value(0)), IsInt32Constant(high_word_value(0)),
IsInt32Constant(low_word_value(1)), IsInt32Constant(high_word_value(1)));
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn2(IsProjection(0, AllOf(CaptureEq(&mul_capture), mul_matcher)),
IsProjection(1, AllOf(CaptureEq(&mul_capture), mul_matcher)),
start(), start()));
}
TEST_F(Int64LoweringTest, Int64Ior) {
LowerGraph(graph()->NewNode(machine()->Word64Or(), Int64Constant(value(0)),
Int64Constant(value(1))),
MachineRepresentation::kWord64);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsWord32Or(IsInt32Constant(low_word_value(0)),
IsInt32Constant(low_word_value(1))),
IsWord32Or(IsInt32Constant(high_word_value(0)),
IsInt32Constant(high_word_value(1))),
start(), start()));
}
TEST_F(Int64LoweringTest, Int64Xor) {
LowerGraph(graph()->NewNode(machine()->Word64Xor(), Int64Constant(value(0)),
Int64Constant(value(1))),
MachineRepresentation::kWord64);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsWord32Xor(IsInt32Constant(low_word_value(0)),
IsInt32Constant(low_word_value(1))),
IsWord32Xor(IsInt32Constant(high_word_value(0)),
IsInt32Constant(high_word_value(1))),
start(), start()));
}
TEST_F(Int64LoweringTest, Int64Shl) {
LowerGraph(graph()->NewNode(machine()->Word64Shl(), Int64Constant(value(0)),
Int64Constant(value(1))),
MachineRepresentation::kWord64);
Capture<Node*> shl;
Matcher<Node*> shl_matcher = IsWord32PairShl(
IsInt32Constant(low_word_value(0)), IsInt32Constant(high_word_value(0)),
IsInt32Constant(low_word_value(1)));
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsProjection(0, AllOf(CaptureEq(&shl), shl_matcher)),
IsProjection(1, AllOf(CaptureEq(&shl), shl_matcher)),
start(), start()));
}
TEST_F(Int64LoweringTest, Int64ShrU) {
LowerGraph(graph()->NewNode(machine()->Word64Shr(), Int64Constant(value(0)),
Int64Constant(value(1))),
MachineRepresentation::kWord64);
Capture<Node*> shr;
Matcher<Node*> shr_matcher = IsWord32PairShr(
IsInt32Constant(low_word_value(0)), IsInt32Constant(high_word_value(0)),
IsInt32Constant(low_word_value(1)));
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsProjection(0, AllOf(CaptureEq(&shr), shr_matcher)),
IsProjection(1, AllOf(CaptureEq(&shr), shr_matcher)),
start(), start()));
}
TEST_F(Int64LoweringTest, Int64ShrS) {
LowerGraph(graph()->NewNode(machine()->Word64Sar(), Int64Constant(value(0)),
Int64Constant(value(1))),
MachineRepresentation::kWord64);
Capture<Node*> sar;
Matcher<Node*> sar_matcher = IsWord32PairSar(
IsInt32Constant(low_word_value(0)), IsInt32Constant(high_word_value(0)),
IsInt32Constant(low_word_value(1)));
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsProjection(0, AllOf(CaptureEq(&sar), sar_matcher)),
IsProjection(1, AllOf(CaptureEq(&sar), sar_matcher)),
start(), start()));
}
TEST_F(Int64LoweringTest, Int64Eq) {
LowerGraph(graph()->NewNode(machine()->Word64Equal(), Int64Constant(value(0)),
Int64Constant(value(1))),
MachineRepresentation::kWord32);
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn(IsWord32Equal(
IsWord32Or(IsWord32Xor(IsInt32Constant(low_word_value(0)),
IsInt32Constant(low_word_value(1))),
IsWord32Xor(IsInt32Constant(high_word_value(0)),
IsInt32Constant(high_word_value(1)))),
IsInt32Constant(0)),
start(), start()));
}
TEST_F(Int64LoweringTest, Int64LtS) {
TestComparison(machine()->Int64LessThan(), IsInt32LessThan, IsUint32LessThan);
}
TEST_F(Int64LoweringTest, Int64LeS) {
TestComparison(machine()->Int64LessThanOrEqual(), IsInt32LessThan,
IsUint32LessThanOrEqual);
}
TEST_F(Int64LoweringTest, Int64LtU) {
TestComparison(machine()->Uint64LessThan(), IsUint32LessThan,
IsUint32LessThan);
}
TEST_F(Int64LoweringTest, Int64LeU) {
TestComparison(machine()->Uint64LessThanOrEqual(), IsUint32LessThan,
IsUint32LessThanOrEqual);
}
TEST_F(Int64LoweringTest, I32ConvertI64) {
LowerGraph(graph()->NewNode(machine()->TruncateInt64ToInt32(),
Int64Constant(value(0))),
MachineRepresentation::kWord32);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn(IsInt32Constant(low_word_value(0)), start(), start()));
}
TEST_F(Int64LoweringTest, I64SConvertI32) {
LowerGraph(graph()->NewNode(machine()->ChangeInt32ToInt64(),
Int32Constant(low_word_value(0))),
MachineRepresentation::kWord64);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsInt32Constant(low_word_value(0)),
IsWord32Sar(IsInt32Constant(low_word_value(0)),
IsInt32Constant(31)),
start(), start()));
}
TEST_F(Int64LoweringTest, I64SConvertI32_2) {
LowerGraph(
graph()->NewNode(machine()->ChangeInt32ToInt64(),
graph()->NewNode(machine()->TruncateInt64ToInt32(),
Int64Constant(value(0)))),
MachineRepresentation::kWord64);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsInt32Constant(low_word_value(0)),
IsWord32Sar(IsInt32Constant(low_word_value(0)),
IsInt32Constant(31)),
start(), start()));
}
TEST_F(Int64LoweringTest, I64UConvertI32) {
LowerGraph(graph()->NewNode(machine()->ChangeUint32ToUint64(),
Int32Constant(low_word_value(0))),
MachineRepresentation::kWord64);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsInt32Constant(low_word_value(0)), IsInt32Constant(0),
start(), start()));
}
TEST_F(Int64LoweringTest, I64UConvertI32_2) {
LowerGraph(
graph()->NewNode(machine()->ChangeUint32ToUint64(),
graph()->NewNode(machine()->TruncateInt64ToInt32(),
Int64Constant(value(0)))),
MachineRepresentation::kWord64);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsInt32Constant(low_word_value(0)), IsInt32Constant(0),
start(), start()));
}
TEST_F(Int64LoweringTest, F64ReinterpretI64) {
LowerGraph(graph()->NewNode(machine()->BitcastInt64ToFloat64(),
Int64Constant(value(0))),
MachineRepresentation::kFloat64);
Capture<Node*> stack_slot_capture;
Matcher<Node*> stack_slot_matcher =
IsStackSlot(StackSlotRepresentation(sizeof(int64_t), 0));
Capture<Node*> store_capture;
Matcher<Node*> store_matcher =
IsStore(StoreRepresentation(MachineRepresentation::kWord32,
WriteBarrierKind::kNoWriteBarrier),
AllOf(CaptureEq(&stack_slot_capture), stack_slot_matcher),
IsInt32Constant(kInt64LowerHalfMemoryOffset),
IsInt32Constant(low_word_value(0)),
IsStore(StoreRepresentation(MachineRepresentation::kWord32,
WriteBarrierKind::kNoWriteBarrier),
AllOf(CaptureEq(&stack_slot_capture), stack_slot_matcher),
IsInt32Constant(kInt64UpperHalfMemoryOffset),
IsInt32Constant(high_word_value(0)), start(), start()),
start());
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn(IsLoad(MachineType::Float64(),
AllOf(CaptureEq(&stack_slot_capture), stack_slot_matcher),
IsInt32Constant(0),
AllOf(CaptureEq(&store_capture), store_matcher), start()),
start(), start()));
}
TEST_F(Int64LoweringTest, I64ReinterpretF64) {
LowerGraph(graph()->NewNode(machine()->BitcastFloat64ToInt64(),
Float64Constant(bit_cast<double>(value(0)))),
MachineRepresentation::kWord64);
Capture<Node*> stack_slot;
Matcher<Node*> stack_slot_matcher =
IsStackSlot(StackSlotRepresentation(sizeof(int64_t), 0));
Capture<Node*> store;
Matcher<Node*> store_matcher = IsStore(
StoreRepresentation(MachineRepresentation::kFloat64,
WriteBarrierKind::kNoWriteBarrier),
AllOf(CaptureEq(&stack_slot), stack_slot_matcher), IsInt32Constant(0),
IsFloat64Constant(bit_cast<double>(value(0))), start(), start());
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn2(IsLoad(MachineType::Int32(),
AllOf(CaptureEq(&stack_slot), stack_slot_matcher),
IsInt32Constant(kInt64LowerHalfMemoryOffset),
AllOf(CaptureEq(&store), store_matcher), start()),
IsLoad(MachineType::Int32(),
AllOf(CaptureEq(&stack_slot), stack_slot_matcher),
IsInt32Constant(kInt64UpperHalfMemoryOffset),
AllOf(CaptureEq(&store), store_matcher), start()),
start(), start()));
}
TEST_F(Int64LoweringTest, Dfs) {
Node* common = Int64Constant(value(0));
LowerGraph(graph()->NewNode(machine()->Word64And(), common,
graph()->NewNode(machine()->Word64And(), common,
Int64Constant(value(1)))),
MachineRepresentation::kWord64);
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn2(IsWord32And(IsInt32Constant(low_word_value(0)),
IsWord32And(IsInt32Constant(low_word_value(0)),
IsInt32Constant(low_word_value(1)))),
IsWord32And(IsInt32Constant(high_word_value(0)),
IsWord32And(IsInt32Constant(high_word_value(0)),
IsInt32Constant(high_word_value(1)))),
start(), start()));
}
TEST_F(Int64LoweringTest, I64Popcnt) {
LowerGraph(graph()->NewNode(machine()->Word64Popcnt().placeholder(),
Int64Constant(value(0))),
MachineRepresentation::kWord64);
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn2(IsInt32Add(IsWord32Popcnt(IsInt32Constant(low_word_value(0))),
IsWord32Popcnt(IsInt32Constant(high_word_value(0)))),
IsInt32Constant(0), start(), start()));
}
TEST_F(Int64LoweringTest, I64PhiWord64) {
LowerGraph(graph()->NewNode(common()->Phi(MachineRepresentation::kWord64, 2),
Int64Constant(value(0)), Int64Constant(value(1)),
start()),
MachineRepresentation::kWord64);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsPhi(MachineRepresentation::kWord32,
IsInt32Constant(low_word_value(0)),
IsInt32Constant(low_word_value(1)), start()),
IsPhi(MachineRepresentation::kWord32,
IsInt32Constant(high_word_value(0)),
IsInt32Constant(high_word_value(1)), start()),
start(), start()));
}
void TestPhi(Int64LoweringTest* test, MachineRepresentation rep, Node* v1,
Node* v2) {
test->LowerGraph(test->graph()->NewNode(test->common()->Phi(rep, 2), v1, v2,
test->start()),
rep);
EXPECT_THAT(test->graph()->end()->InputAt(1),
IsReturn(IsPhi(rep, v1, v2, test->start()), test->start(),
test->start()));
}
TEST_F(Int64LoweringTest, I64PhiFloat32) {
TestPhi(this, MachineRepresentation::kFloat32, Float32Constant(1.5),
Float32Constant(2.5));
}
TEST_F(Int64LoweringTest, I64PhiFloat64) {
TestPhi(this, MachineRepresentation::kFloat64, Float32Constant(1.5),
Float32Constant(2.5));
}
TEST_F(Int64LoweringTest, I64PhiWord32) {
TestPhi(this, MachineRepresentation::kWord32, Float32Constant(1),
Float32Constant(2));
}
TEST_F(Int64LoweringTest, I64ReverseBytes) {
LowerGraph(graph()->NewNode(machine()->Word64ReverseBytes(),
Int64Constant(value(0))),
MachineRepresentation::kWord64);
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn2(IsWord32ReverseBytes(IsInt32Constant(high_word_value(0))),
IsWord32ReverseBytes(IsInt32Constant(low_word_value(0))),
start(), start()));
}
TEST_F(Int64LoweringTest, EffectPhiLoop) {
// Construct a cycle consisting of an EffectPhi, a Store, and a Load.
Node* eff_phi = graph()->NewNode(common()->EffectPhi(1), graph()->start(),
graph()->start());
StoreRepresentation store_rep(MachineRepresentation::kWord64,
WriteBarrierKind::kNoWriteBarrier);
LoadRepresentation load_rep(MachineType::Int64());
Node* load =
graph()->NewNode(machine()->Load(load_rep), Int64Constant(value(0)),
Int64Constant(value(1)), eff_phi, graph()->start());
Node* store =
graph()->NewNode(machine()->Store(store_rep), Int64Constant(value(0)),
Int64Constant(value(1)), load, load, graph()->start());
eff_phi->InsertInput(zone(), 1, store);
NodeProperties::ChangeOp(eff_phi,
common()->ResizeMergeOrPhi(eff_phi->op(), 2));
LowerGraph(load, MachineRepresentation::kWord64);
}
TEST_F(Int64LoweringTest, LoopCycle) {
// New node with two placeholders.
Node* compare = graph()->NewNode(machine()->Word64Equal(), Int64Constant(0),
Int64Constant(value(0)));
Node* load = graph()->NewNode(
machine()->Load(MachineType::Int64()), Int64Constant(value(1)),
Int64Constant(value(2)), graph()->start(),
graph()->NewNode(
common()->Loop(2), graph()->start(),
graph()->NewNode(common()->IfFalse(),
graph()->NewNode(common()->Branch(), compare,
graph()->start()))));
NodeProperties::ReplaceValueInput(compare, load, 0);
LowerGraph(load, MachineRepresentation::kWord64);
}
TEST_F(Int64LoweringTest, LoopExitValue) {
Node* loop_header = graph()->NewNode(common()->Loop(1), graph()->start());
Node* loop_exit =
graph()->NewNode(common()->LoopExit(), loop_header, loop_header);
Node* exit =
graph()->NewNode(common()->LoopExitValue(MachineRepresentation::kWord64),
Int64Constant(value(2)), loop_exit);
LowerGraph(exit, MachineRepresentation::kWord64);
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsLoopExitValue(MachineRepresentation::kWord32,
IsInt32Constant(low_word_value(2))),
IsLoopExitValue(MachineRepresentation::kWord32,
IsInt32Constant(high_word_value(2))),
start(), start()));
}
TEST_F(Int64LoweringTest, WasmBigIntSpecialCaseBigIntToI64) {
Node* target = Int32Constant(1);
Node* context = Int32Constant(2);
Node* bigint = Int32Constant(4);
CallDescriptor* bigint_to_i64_call_descriptor =
Linkage::GetStubCallDescriptor(
zone(), // zone
BigIntToI64Descriptor(), // descriptor
BigIntToI64Descriptor::GetStackParameterCount(), // stack parameter
// count
CallDescriptor::kNoFlags, // flags
Operator::kNoProperties, // properties
StubCallMode::kCallCodeObject); // stub call mode
CallDescriptor* bigint_to_i32_pair_call_descriptor =
Linkage::GetStubCallDescriptor(
zone(), // zone
BigIntToI32PairDescriptor(), // descriptor
BigIntToI32PairDescriptor::
GetStackParameterCount(), // stack parameter count
CallDescriptor::kNoFlags, // flags
Operator::kNoProperties, // properties
StubCallMode::kCallCodeObject); // stub call mode
auto lowering_special_case = std::make_unique<Int64LoweringSpecialCase>();
lowering_special_case->replacements.insert(
{bigint_to_i64_call_descriptor, bigint_to_i32_pair_call_descriptor});
Node* call_node =
graph()->NewNode(common()->Call(bigint_to_i64_call_descriptor), target,
bigint, context, start(), start());
LowerGraphWithSpecialCase(call_node, std::move(lowering_special_case),
MachineRepresentation::kWord64);
Capture<Node*> call;
Matcher<Node*> call_matcher =
IsCall(bigint_to_i32_pair_call_descriptor, target, bigint, context,
start(), start());
EXPECT_THAT(graph()->end()->InputAt(1),
IsReturn2(IsProjection(0, AllOf(CaptureEq(&call), call_matcher)),
IsProjection(1, AllOf(CaptureEq(&call), call_matcher)),
start(), start()));
}
TEST_F(Int64LoweringTest, WasmBigIntSpecialCaseI64ToBigInt) {
Node* target = Int32Constant(1);
Node* i64 = Int64Constant(value(0));
CallDescriptor* i64_to_bigint_call_descriptor =
Linkage::GetStubCallDescriptor(
zone(), // zone
I64ToBigIntDescriptor(), // descriptor
I64ToBigIntDescriptor::GetStackParameterCount(), // stack parameter
// count
CallDescriptor::kNoFlags, // flags
Operator::kNoProperties, // properties
StubCallMode::kCallCodeObject); // stub call mode
CallDescriptor* i32_pair_to_bigint_call_descriptor =
Linkage::GetStubCallDescriptor(
zone(), // zone
I32PairToBigIntDescriptor(), // descriptor
I32PairToBigIntDescriptor::
GetStackParameterCount(), // stack parameter count
CallDescriptor::kNoFlags, // flags
Operator::kNoProperties, // properties
StubCallMode::kCallCodeObject); // stub call mode
auto lowering_special_case = std::make_unique<Int64LoweringSpecialCase>();
lowering_special_case->replacements.insert(
{i64_to_bigint_call_descriptor, i32_pair_to_bigint_call_descriptor});
Node* call = graph()->NewNode(common()->Call(i64_to_bigint_call_descriptor),
target, i64, start(), start());
LowerGraphWithSpecialCase(call, std::move(lowering_special_case),
MachineRepresentation::kTaggedPointer);
EXPECT_THAT(
graph()->end()->InputAt(1),
IsReturn(IsCall(i32_pair_to_bigint_call_descriptor, target,
IsInt32Constant(low_word_value(0)),
IsInt32Constant(high_word_value(0)), start(), start()),
start(), start()));
}
} // namespace compiler
} // namespace internal
} // namespace v8
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