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v8/test/unittests/interpreter/bytecode-array-random-iterator-unittest.cc
leszeks b9d930735a [ignition] Rewrite reverse iterator as random iterator 
This allows us to optimise the bytecode liveness analysis to jump
directly to previously seen indices. The analysis is optimised to store
a stack of loop ends (JumpLoop bytecode indices), and iterate through
these indices directly rather than looping through the bytecode array to
find them.

Review-Url: https://codereview.chromium.org/2536653003
Cr-Commit-Position: refs/heads/master@{#41485}
2016-12-05 13:03:43 +00:00

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// Copyright 2015 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/v8.h"
#include "src/interpreter/bytecode-array-builder.h"
#include "src/interpreter/bytecode-array-random-iterator.h"
#include "test/unittests/test-utils.h"
namespace v8 {
namespace internal {
namespace interpreter {
class BytecodeArrayRandomIteratorTest : public TestWithIsolateAndZone {
public:
BytecodeArrayRandomIteratorTest() {}
~BytecodeArrayRandomIteratorTest() override {}
};
TEST_F(BytecodeArrayRandomIteratorTest, InvalidBeforeStart) {
// Use a builder to create an array with containing multiple bytecodes
// with 0, 1 and 2 operands.
BytecodeArrayBuilder builder(isolate(), zone(), 3, 3, 0);
Factory* factory = isolate()->factory();
Handle<HeapObject> heap_num_0 = factory->NewHeapNumber(2.718);
Handle<HeapObject> heap_num_1 = factory->NewHeapNumber(2147483647);
Smi* zero = Smi::kZero;
Smi* smi_0 = Smi::FromInt(64);
Smi* smi_1 = Smi::FromInt(-65536);
Register reg_0(0);
Register reg_1(1);
RegisterList pair(0, 2);
RegisterList triple(0, 3);
Register param = Register::FromParameterIndex(2, builder.parameter_count());
Handle<String> name = factory->NewStringFromStaticChars("abc");
uint32_t feedback_slot = 97;
builder.LoadLiteral(heap_num_0)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(heap_num_1)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(zero)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(smi_0)
.StackCheck(0)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(smi_1)
.StackCheck(1)
.StoreAccumulatorInRegister(reg_1)
.LoadAccumulatorWithRegister(reg_0)
.BinaryOperation(Token::Value::ADD, reg_0, 2)
.StoreAccumulatorInRegister(reg_1)
.LoadNamedProperty(reg_1, name, feedback_slot)
.BinaryOperation(Token::Value::ADD, reg_0, 3)
.StoreAccumulatorInRegister(param)
.CallRuntimeForPair(Runtime::kLoadLookupSlotForCall, param, pair)
.ForInPrepare(reg_0, triple)
.CallRuntime(Runtime::kLoadIC_Miss, reg_0)
.Debugger()
.LoadGlobal(name, 0x10000000, TypeofMode::NOT_INSIDE_TYPEOF)
.Return();
Handle<BytecodeArray> bytecodeArray = builder.ToBytecodeArray(isolate());
BytecodeArrayRandomIterator iterator(bytecodeArray, zone());
iterator.GoToStart();
ASSERT_TRUE(iterator.IsValid());
--iterator;
ASSERT_FALSE(iterator.IsValid());
}
TEST_F(BytecodeArrayRandomIteratorTest, InvalidAfterEnd) {
// Use a builder to create an array with containing multiple bytecodes
// with 0, 1 and 2 operands.
BytecodeArrayBuilder builder(isolate(), zone(), 3, 3, 0);
Factory* factory = isolate()->factory();
Handle<HeapObject> heap_num_0 = factory->NewHeapNumber(2.718);
Handle<HeapObject> heap_num_1 = factory->NewHeapNumber(2147483647);
Smi* zero = Smi::kZero;
Smi* smi_0 = Smi::FromInt(64);
Smi* smi_1 = Smi::FromInt(-65536);
Register reg_0(0);
Register reg_1(1);
RegisterList pair(0, 2);
RegisterList triple(0, 3);
Register param = Register::FromParameterIndex(2, builder.parameter_count());
Handle<String> name = factory->NewStringFromStaticChars("abc");
uint32_t feedback_slot = 97;
builder.LoadLiteral(heap_num_0)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(heap_num_1)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(zero)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(smi_0)
.StackCheck(0)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(smi_1)
.StackCheck(1)
.StoreAccumulatorInRegister(reg_1)
.LoadAccumulatorWithRegister(reg_0)
.BinaryOperation(Token::Value::ADD, reg_0, 2)
.StoreAccumulatorInRegister(reg_1)
.LoadNamedProperty(reg_1, name, feedback_slot)
.BinaryOperation(Token::Value::ADD, reg_0, 3)
.StoreAccumulatorInRegister(param)
.CallRuntimeForPair(Runtime::kLoadLookupSlotForCall, param, pair)
.ForInPrepare(reg_0, triple)
.CallRuntime(Runtime::kLoadIC_Miss, reg_0)
.Debugger()
.LoadGlobal(name, 0x10000000, TypeofMode::NOT_INSIDE_TYPEOF)
.Return();
Handle<BytecodeArray> bytecodeArray = builder.ToBytecodeArray(isolate());
BytecodeArrayRandomIterator iterator(bytecodeArray, zone());
iterator.GoToEnd();
ASSERT_TRUE(iterator.IsValid());
++iterator;
ASSERT_FALSE(iterator.IsValid());
}
TEST_F(BytecodeArrayRandomIteratorTest, AccessesFirst) {
// Use a builder to create an array with containing multiple bytecodes
// with 0, 1 and 2 operands.
BytecodeArrayBuilder builder(isolate(), zone(), 3, 3, 0);
Factory* factory = isolate()->factory();
Handle<HeapObject> heap_num_0 = factory->NewHeapNumber(2.718);
Handle<HeapObject> heap_num_1 = factory->NewHeapNumber(2147483647);
Smi* zero = Smi::kZero;
Smi* smi_0 = Smi::FromInt(64);
Smi* smi_1 = Smi::FromInt(-65536);
Register reg_0(0);
Register reg_1(1);
RegisterList pair(0, 2);
RegisterList triple(0, 3);
Register param = Register::FromParameterIndex(2, builder.parameter_count());
Handle<String> name = factory->NewStringFromStaticChars("abc");
uint32_t feedback_slot = 97;
builder.LoadLiteral(heap_num_0)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(heap_num_1)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(zero)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(smi_0)
.StackCheck(0)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(smi_1)
.StackCheck(1)
.StoreAccumulatorInRegister(reg_1)
.LoadAccumulatorWithRegister(reg_0)
.BinaryOperation(Token::Value::ADD, reg_0, 2)
.StoreAccumulatorInRegister(reg_1)
.LoadNamedProperty(reg_1, name, feedback_slot)
.BinaryOperation(Token::Value::ADD, reg_0, 3)
.StoreAccumulatorInRegister(param)
.CallRuntimeForPair(Runtime::kLoadLookupSlotForCall, param, pair)
.ForInPrepare(reg_0, triple)
.CallRuntime(Runtime::kLoadIC_Miss, reg_0)
.Debugger()
.LoadGlobal(name, 0x10000000, TypeofMode::NOT_INSIDE_TYPEOF)
.Return();
Handle<BytecodeArray> bytecodeArray = builder.ToBytecodeArray(isolate());
BytecodeArrayRandomIterator iterator(bytecodeArray, zone());
iterator.GoToStart();
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaConstant);
EXPECT_EQ(iterator.current_index(), 0);
EXPECT_EQ(iterator.current_offset(), 0);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_TRUE(
iterator.GetConstantForIndexOperand(0).is_identical_to(heap_num_0));
ASSERT_TRUE(iterator.IsValid());
}
TEST_F(BytecodeArrayRandomIteratorTest, AccessesLast) {
// Use a builder to create an array with containing multiple bytecodes
// with 0, 1 and 2 operands.
BytecodeArrayBuilder builder(isolate(), zone(), 3, 3, 0);
Factory* factory = isolate()->factory();
Handle<HeapObject> heap_num_0 = factory->NewHeapNumber(2.718);
Handle<HeapObject> heap_num_1 = factory->NewHeapNumber(2147483647);
Smi* zero = Smi::kZero;
Smi* smi_0 = Smi::FromInt(64);
Smi* smi_1 = Smi::FromInt(-65536);
Register reg_0(0);
Register reg_1(1);
RegisterList pair(0, 2);
RegisterList triple(0, 3);
Register param = Register::FromParameterIndex(2, builder.parameter_count());
Handle<String> name = factory->NewStringFromStaticChars("abc");
uint32_t feedback_slot = 97;
builder.LoadLiteral(heap_num_0)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(heap_num_1)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(zero)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(smi_0)
.StackCheck(0)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(smi_1)
.StackCheck(1)
.StoreAccumulatorInRegister(reg_1)
.LoadAccumulatorWithRegister(reg_0)
.BinaryOperation(Token::Value::ADD, reg_0, 2)
.StoreAccumulatorInRegister(reg_1)
.LoadNamedProperty(reg_1, name, feedback_slot)
.BinaryOperation(Token::Value::ADD, reg_0, 3)
.StoreAccumulatorInRegister(param)
.CallRuntimeForPair(Runtime::kLoadLookupSlotForCall, param, pair)
.ForInPrepare(reg_0, triple)
.CallRuntime(Runtime::kLoadIC_Miss, reg_0)
.Debugger()
.LoadGlobal(name, 0x10000000, TypeofMode::NOT_INSIDE_TYPEOF)
.Return();
Handle<BytecodeArray> bytecodeArray = builder.ToBytecodeArray(isolate());
BytecodeArrayRandomIterator iterator(bytecodeArray, zone());
iterator.GoToEnd();
int offset = bytecodeArray->length() -
Bytecodes::Size(Bytecode::kReturn, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kReturn);
EXPECT_EQ(iterator.current_index(), 23);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
ASSERT_TRUE(iterator.IsValid());
}
TEST_F(BytecodeArrayRandomIteratorTest, RandomAccessValid) {
// Use a builder to create an array with containing multiple bytecodes
// with 0, 1 and 2 operands.
BytecodeArrayBuilder builder(isolate(), zone(), 3, 3, 0);
Factory* factory = isolate()->factory();
Handle<HeapObject> heap_num_0 = factory->NewHeapNumber(2.718);
Handle<HeapObject> heap_num_1 = factory->NewHeapNumber(2147483647);
Smi* zero = Smi::kZero;
Smi* smi_0 = Smi::FromInt(64);
Smi* smi_1 = Smi::FromInt(-65536);
Register reg_0(0);
Register reg_1(1);
RegisterList pair(0, 2);
RegisterList triple(0, 3);
Register param = Register::FromParameterIndex(2, builder.parameter_count());
Handle<String> name = factory->NewStringFromStaticChars("abc");
uint32_t name_index = 2;
uint32_t feedback_slot = 97;
builder.LoadLiteral(heap_num_0)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(heap_num_1)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(zero)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(smi_0)
.StackCheck(0)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(smi_1)
.StackCheck(1)
.StoreAccumulatorInRegister(reg_1)
.LoadAccumulatorWithRegister(reg_0)
.BinaryOperation(Token::Value::ADD, reg_0, 2)
.StoreAccumulatorInRegister(reg_1)
.LoadNamedProperty(reg_1, name, feedback_slot)
.BinaryOperation(Token::Value::ADD, reg_0, 3)
.StoreAccumulatorInRegister(param)
.CallRuntimeForPair(Runtime::kLoadLookupSlotForCall, param, pair)
.ForInPrepare(reg_0, triple)
.CallRuntime(Runtime::kLoadIC_Miss, reg_0)
.Debugger()
.LoadGlobal(name, 0x10000000, TypeofMode::NOT_INSIDE_TYPEOF)
.Return();
// Test iterator sees the expected output from the builder.
BytecodeArrayRandomIterator iterator(builder.ToBytecodeArray(isolate()),
zone());
const int kPrefixByteSize = 1;
int offset = 0;
iterator.GoToIndex(13);
offset = Bytecodes::Size(Bytecode::kLdaConstant, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaConstant, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaZero, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaSmi, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStackCheck, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaSmi, OperandScale::kQuadruple) +
kPrefixByteSize;
offset += Bytecodes::Size(Bytecode::kStackCheck, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdar, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kAdd);
EXPECT_EQ(iterator.current_index(), 13);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
iterator.GoToIndex(2);
offset = Bytecodes::Size(Bytecode::kLdaConstant, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaConstant);
EXPECT_EQ(iterator.current_index(), 2);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_TRUE(
iterator.GetConstantForIndexOperand(0).is_identical_to(heap_num_1));
ASSERT_TRUE(iterator.IsValid());
iterator.GoToIndex(18);
offset = Bytecodes::Size(Bytecode::kLdaConstant, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaConstant, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaZero, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaSmi, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStackCheck, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaSmi, OperandScale::kQuadruple) +
kPrefixByteSize;
offset += Bytecodes::Size(Bytecode::kStackCheck, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kAdd, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaNamedProperty, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kAdd, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kCallRuntimeForPair);
EXPECT_EQ(iterator.current_index(), 18);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRuntimeIdOperand(0), Runtime::kLoadLookupSlotForCall);
EXPECT_EQ(iterator.GetRegisterOperand(1).index(), param.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(1), 1);
EXPECT_EQ(iterator.GetRegisterCountOperand(2), 1u);
EXPECT_EQ(iterator.GetRegisterOperand(3).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(3), 2);
ASSERT_TRUE(iterator.IsValid());
iterator -= 3;
offset -= Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset -= Bytecodes::Size(Bytecode::kAdd, OperandScale::kSingle);
offset -= Bytecodes::Size(Bytecode::kLdaNamedProperty, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaNamedProperty);
EXPECT_EQ(iterator.current_index(), 15);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_1.index());
EXPECT_EQ(iterator.GetIndexOperand(1), name_index);
EXPECT_EQ(iterator.GetIndexOperand(2), feedback_slot);
ASSERT_TRUE(iterator.IsValid());
iterator += 2;
offset += Bytecodes::Size(Bytecode::kLdaNamedProperty, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kAdd, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 17);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), param.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
iterator.GoToIndex(23);
offset = Bytecodes::Size(Bytecode::kLdaConstant, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaConstant, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaZero, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaSmi, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStackCheck, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaSmi, OperandScale::kQuadruple) +
kPrefixByteSize;
offset += Bytecodes::Size(Bytecode::kStackCheck, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kAdd, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaNamedProperty, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kAdd, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
offset +=
Bytecodes::Size(Bytecode::kCallRuntimeForPair, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kForInPrepare, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kCallRuntime, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kDebugger, OperandScale::kSingle);
offset += Bytecodes::Size(Bytecode::kLdaGlobal, OperandScale::kQuadruple) +
kPrefixByteSize;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kReturn);
EXPECT_EQ(iterator.current_index(), 23);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
ASSERT_TRUE(iterator.IsValid());
iterator.GoToIndex(24);
EXPECT_FALSE(iterator.IsValid());
iterator.GoToIndex(-5);
EXPECT_FALSE(iterator.IsValid());
}
TEST_F(BytecodeArrayRandomIteratorTest, IteratesBytecodeArray) {
// Use a builder to create an array with containing multiple bytecodes
// with 0, 1 and 2 operands.
BytecodeArrayBuilder builder(isolate(), zone(), 3, 3, 0);
Factory* factory = isolate()->factory();
Handle<HeapObject> heap_num_0 = factory->NewHeapNumber(2.718);
Handle<HeapObject> heap_num_1 = factory->NewHeapNumber(2147483647);
Smi* zero = Smi::kZero;
Smi* smi_0 = Smi::FromInt(64);
Smi* smi_1 = Smi::FromInt(-65536);
Register reg_0(0);
Register reg_1(1);
RegisterList pair(0, 2);
RegisterList triple(0, 3);
Register param = Register::FromParameterIndex(2, builder.parameter_count());
Handle<String> name = factory->NewStringFromStaticChars("abc");
uint32_t name_index = 2;
uint32_t feedback_slot = 97;
builder.LoadLiteral(heap_num_0)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(heap_num_1)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(zero)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(smi_0)
.StackCheck(0)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(smi_1)
.StackCheck(1)
.StoreAccumulatorInRegister(reg_1)
.LoadAccumulatorWithRegister(reg_0)
.BinaryOperation(Token::Value::ADD, reg_0, 2)
.StoreAccumulatorInRegister(reg_1)
.LoadNamedProperty(reg_1, name, feedback_slot)
.BinaryOperation(Token::Value::ADD, reg_0, 3)
.StoreAccumulatorInRegister(param)
.CallRuntimeForPair(Runtime::kLoadLookupSlotForCall, param, pair)
.ForInPrepare(reg_0, triple)
.CallRuntime(Runtime::kLoadIC_Miss, reg_0)
.Debugger()
.LoadGlobal(name, 0x10000000, TypeofMode::NOT_INSIDE_TYPEOF)
.Return();
// Test iterator sees the expected output from the builder.
BytecodeArrayRandomIterator iterator(builder.ToBytecodeArray(isolate()),
zone());
const int kPrefixByteSize = 1;
int offset = 0;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaConstant);
EXPECT_EQ(iterator.current_index(), 0);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_TRUE(
iterator.GetConstantForIndexOperand(0).is_identical_to(heap_num_0));
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kLdaConstant, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 1);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaConstant);
EXPECT_EQ(iterator.current_index(), 2);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_TRUE(
iterator.GetConstantForIndexOperand(0).is_identical_to(heap_num_1));
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kLdaConstant, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 3);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaZero);
EXPECT_EQ(iterator.current_index(), 4);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kLdaZero, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 5);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaSmi);
EXPECT_EQ(iterator.current_index(), 6);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(Smi::FromInt(iterator.GetImmediateOperand(0)), smi_0);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kLdaSmi, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStackCheck);
EXPECT_EQ(iterator.current_index(), 7);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(Bytecodes::NumberOfOperands(iterator.current_bytecode()), 0);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kStackCheck, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 8);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaSmi);
EXPECT_EQ(iterator.current_index(), 9);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kQuadruple);
EXPECT_EQ(Smi::FromInt(iterator.GetImmediateOperand(0)), smi_1);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kLdaSmi, OperandScale::kQuadruple) +
kPrefixByteSize;
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStackCheck);
EXPECT_EQ(iterator.current_index(), 10);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(Bytecodes::NumberOfOperands(iterator.current_bytecode()), 0);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kStackCheck, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 11);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_1.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdar);
EXPECT_EQ(iterator.current_index(), 12);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kLdar, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kAdd);
EXPECT_EQ(iterator.current_index(), 13);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kAdd, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 14);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_1.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaNamedProperty);
EXPECT_EQ(iterator.current_index(), 15);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_1.index());
EXPECT_EQ(iterator.GetIndexOperand(1), name_index);
EXPECT_EQ(iterator.GetIndexOperand(2), feedback_slot);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kLdaNamedProperty, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kAdd);
EXPECT_EQ(iterator.current_index(), 16);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kAdd, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 17);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), param.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kCallRuntimeForPair);
EXPECT_EQ(iterator.current_index(), 18);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRuntimeIdOperand(0), Runtime::kLoadLookupSlotForCall);
EXPECT_EQ(iterator.GetRegisterOperand(1).index(), param.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(1), 1);
EXPECT_EQ(iterator.GetRegisterCountOperand(2), 1u);
EXPECT_EQ(iterator.GetRegisterOperand(3).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(3), 2);
ASSERT_TRUE(iterator.IsValid());
offset +=
Bytecodes::Size(Bytecode::kCallRuntimeForPair, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kForInPrepare);
EXPECT_EQ(iterator.current_index(), 19);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
EXPECT_EQ(iterator.GetRegisterOperand(1).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(1), 3);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kForInPrepare, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kCallRuntime);
EXPECT_EQ(iterator.current_index(), 20);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRuntimeIdOperand(0), Runtime::kLoadIC_Miss);
EXPECT_EQ(iterator.GetRegisterOperand(1).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterCountOperand(2), 1u);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kCallRuntime, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kDebugger);
EXPECT_EQ(iterator.current_index(), 21);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
ASSERT_TRUE(iterator.IsValid());
offset += Bytecodes::Size(Bytecode::kDebugger, OperandScale::kSingle);
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaGlobal);
EXPECT_EQ(iterator.current_index(), 22);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kQuadruple);
EXPECT_EQ(iterator.current_bytecode_size(), 10);
EXPECT_EQ(iterator.GetIndexOperand(1), 0x10000000u);
offset += Bytecodes::Size(Bytecode::kLdaGlobal, OperandScale::kQuadruple) +
kPrefixByteSize;
++iterator;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kReturn);
EXPECT_EQ(iterator.current_index(), 23);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
ASSERT_TRUE(iterator.IsValid());
++iterator;
ASSERT_TRUE(!iterator.IsValid());
}
TEST_F(BytecodeArrayRandomIteratorTest, IteratesBytecodeArrayBackwards) {
// Use a builder to create an array with containing multiple bytecodes
// with 0, 1 and 2 operands.
BytecodeArrayBuilder builder(isolate(), zone(), 3, 3, 0);
Factory* factory = isolate()->factory();
Handle<HeapObject> heap_num_0 = factory->NewHeapNumber(2.718);
Handle<HeapObject> heap_num_1 = factory->NewHeapNumber(2147483647);
Smi* zero = Smi::kZero;
Smi* smi_0 = Smi::FromInt(64);
Smi* smi_1 = Smi::FromInt(-65536);
Register reg_0(0);
Register reg_1(1);
RegisterList pair(0, 2);
RegisterList triple(0, 3);
Register param = Register::FromParameterIndex(2, builder.parameter_count());
Handle<String> name = factory->NewStringFromStaticChars("abc");
uint32_t name_index = 2;
uint32_t feedback_slot = 97;
builder.LoadLiteral(heap_num_0)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(heap_num_1)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(zero)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(smi_0)
.StackCheck(0)
.StoreAccumulatorInRegister(reg_0)
.LoadLiteral(smi_1)
.StackCheck(1)
.StoreAccumulatorInRegister(reg_1)
.LoadAccumulatorWithRegister(reg_0)
.BinaryOperation(Token::Value::ADD, reg_0, 2)
.StoreAccumulatorInRegister(reg_1)
.LoadNamedProperty(reg_1, name, feedback_slot)
.BinaryOperation(Token::Value::ADD, reg_0, 3)
.StoreAccumulatorInRegister(param)
.CallRuntimeForPair(Runtime::kLoadLookupSlotForCall, param, pair)
.ForInPrepare(reg_0, triple)
.CallRuntime(Runtime::kLoadIC_Miss, reg_0)
.Debugger()
.LoadGlobal(name, 0x10000000, TypeofMode::NOT_INSIDE_TYPEOF)
.Return();
// Test iterator sees the expected output from the builder.
Handle<BytecodeArray> bytecodeArray = builder.ToBytecodeArray(isolate());
BytecodeArrayRandomIterator iterator(bytecodeArray, zone());
const int kPrefixByteSize = 1;
int offset = bytecodeArray->length();
iterator.GoToEnd();
offset -= Bytecodes::Size(Bytecode::kReturn, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kReturn);
EXPECT_EQ(iterator.current_index(), 23);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kLdaGlobal, OperandScale::kQuadruple) +
kPrefixByteSize;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaGlobal);
EXPECT_EQ(iterator.current_index(), 22);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kQuadruple);
EXPECT_EQ(iterator.current_bytecode_size(), 10);
EXPECT_EQ(iterator.GetIndexOperand(1), 0x10000000u);
--iterator;
offset -= Bytecodes::Size(Bytecode::kDebugger, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kDebugger);
EXPECT_EQ(iterator.current_index(), 21);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kCallRuntime, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kCallRuntime);
EXPECT_EQ(iterator.current_index(), 20);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRuntimeIdOperand(0), Runtime::kLoadIC_Miss);
EXPECT_EQ(iterator.GetRegisterOperand(1).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterCountOperand(2), 1u);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kForInPrepare, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kForInPrepare);
EXPECT_EQ(iterator.current_index(), 19);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
EXPECT_EQ(iterator.GetRegisterOperand(1).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(1), 3);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -=
Bytecodes::Size(Bytecode::kCallRuntimeForPair, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kCallRuntimeForPair);
EXPECT_EQ(iterator.current_index(), 18);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRuntimeIdOperand(0), Runtime::kLoadLookupSlotForCall);
EXPECT_EQ(iterator.GetRegisterOperand(1).index(), param.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(1), 1);
EXPECT_EQ(iterator.GetRegisterCountOperand(2), 1u);
EXPECT_EQ(iterator.GetRegisterOperand(3).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(3), 2);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 17);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), param.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kAdd, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kAdd);
EXPECT_EQ(iterator.current_index(), 16);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kLdaNamedProperty, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaNamedProperty);
EXPECT_EQ(iterator.current_index(), 15);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_1.index());
EXPECT_EQ(iterator.GetIndexOperand(1), name_index);
EXPECT_EQ(iterator.GetIndexOperand(2), feedback_slot);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 14);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_1.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kAdd, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kAdd);
EXPECT_EQ(iterator.current_index(), 13);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kLdar, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdar);
EXPECT_EQ(iterator.current_index(), 12);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 11);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_1.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kStackCheck, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStackCheck);
EXPECT_EQ(iterator.current_index(), 10);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(Bytecodes::NumberOfOperands(iterator.current_bytecode()), 0);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kLdaSmi, OperandScale::kQuadruple) +
kPrefixByteSize;
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaSmi);
EXPECT_EQ(iterator.current_index(), 9);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kQuadruple);
EXPECT_EQ(Smi::FromInt(iterator.GetImmediateOperand(0)), smi_1);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 8);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kStackCheck, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStackCheck);
EXPECT_EQ(iterator.current_index(), 7);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(Bytecodes::NumberOfOperands(iterator.current_bytecode()), 0);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kLdaSmi, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaSmi);
EXPECT_EQ(iterator.current_index(), 6);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(Smi::FromInt(iterator.GetImmediateOperand(0)), smi_0);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 5);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kLdaZero, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaZero);
EXPECT_EQ(iterator.current_index(), 4);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 3);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kLdaConstant, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaConstant);
EXPECT_EQ(iterator.current_index(), 2);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_TRUE(
iterator.GetConstantForIndexOperand(0).is_identical_to(heap_num_1));
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kStar, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kStar);
EXPECT_EQ(iterator.current_index(), 1);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_EQ(iterator.GetRegisterOperand(0).index(), reg_0.index());
EXPECT_EQ(iterator.GetRegisterOperandRange(0), 1);
ASSERT_TRUE(iterator.IsValid());
--iterator;
offset -= Bytecodes::Size(Bytecode::kLdaConstant, OperandScale::kSingle);
EXPECT_EQ(iterator.current_bytecode(), Bytecode::kLdaConstant);
EXPECT_EQ(iterator.current_index(), 0);
EXPECT_EQ(iterator.current_offset(), offset);
EXPECT_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
EXPECT_TRUE(
iterator.GetConstantForIndexOperand(0).is_identical_to(heap_num_0));
ASSERT_TRUE(iterator.IsValid());
--iterator;
ASSERT_FALSE(iterator.IsValid());
}
} // namespace interpreter
} // namespace internal
} // namespace v8
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