fd420203ec
Collect type feedback in the call bytecode handler. The current implementation only collects feedback for JS function objects. The other objects and Array functions do not collect any feedback. They will be marked Megamorphic. BUG=v8:4280, v8:4780 LOG=N Review-Url: https://codereview.chromium.org/2122183002 Cr-Commit-Position: refs/heads/master@{#37700}
849 lines
30 KiB
C++
849 lines
30 KiB
C++
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "src/v8.h"
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#include "src/interpreter/bytecode-array-builder.h"
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#include "src/interpreter/bytecode-array-iterator.h"
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#include "src/interpreter/bytecode-label.h"
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#include "src/interpreter/bytecode-register-allocator.h"
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#include "test/unittests/test-utils.h"
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namespace v8 {
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namespace internal {
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namespace interpreter {
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class BytecodeArrayBuilderTest : public TestWithIsolateAndZone {
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public:
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BytecodeArrayBuilderTest() {}
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~BytecodeArrayBuilderTest() override {}
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};
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TEST_F(BytecodeArrayBuilderTest, AllBytecodesGenerated) {
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BytecodeArrayBuilder builder(isolate(), zone(), 0, 1, 131);
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Factory* factory = isolate()->factory();
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CHECK_EQ(builder.locals_count(), 131);
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CHECK_EQ(builder.context_count(), 1);
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CHECK_EQ(builder.fixed_register_count(), 132);
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Register reg(0);
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Register other(reg.index() + 1);
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Register wide(128);
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// Emit argument creation operations.
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builder.CreateArguments(CreateArgumentsType::kMappedArguments)
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.CreateArguments(CreateArgumentsType::kUnmappedArguments)
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.CreateArguments(CreateArgumentsType::kRestParameter);
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// Emit constant loads.
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builder.LoadLiteral(Smi::FromInt(0))
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.StoreAccumulatorInRegister(reg)
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.LoadLiteral(Smi::FromInt(8))
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.CompareOperation(Token::Value::NE, reg) // Prevent peephole optimization
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// LdaSmi, Star -> LdrSmi.
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.StoreAccumulatorInRegister(reg)
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.LoadLiteral(Smi::FromInt(10000000))
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.StoreAccumulatorInRegister(reg)
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.LoadLiteral(factory->NewStringFromStaticChars("A constant"))
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.StoreAccumulatorInRegister(reg)
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.LoadUndefined()
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.Debugger() // Prevent peephole optimization LdaNull, Star -> LdrNull.
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.LoadNull()
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.StoreAccumulatorInRegister(reg)
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.LoadTheHole()
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.StoreAccumulatorInRegister(reg)
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.LoadTrue()
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.StoreAccumulatorInRegister(reg)
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.LoadFalse()
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.StoreAccumulatorInRegister(wide);
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// Emit Ldar and Star taking care to foil the register optimizer.
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builder.StackCheck(0)
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.LoadAccumulatorWithRegister(other)
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.BinaryOperation(Token::ADD, reg)
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.StoreAccumulatorInRegister(reg)
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.LoadNull();
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// Emit register-register transfer.
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builder.MoveRegister(reg, other);
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builder.MoveRegister(reg, wide);
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// Emit global load / store operations.
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Handle<String> name = factory->NewStringFromStaticChars("var_name");
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builder.LoadGlobal(1, TypeofMode::NOT_INSIDE_TYPEOF)
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.LoadGlobal(1, TypeofMode::INSIDE_TYPEOF)
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.StoreGlobal(name, 1, LanguageMode::SLOPPY)
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.StoreGlobal(name, 1, LanguageMode::STRICT);
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// Emit context operations.
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builder.PushContext(reg)
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.PopContext(reg)
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.LoadContextSlot(reg, 1)
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.StoreContextSlot(reg, 1);
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// Emit load / store property operations.
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builder.LoadNamedProperty(reg, name, 0)
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.LoadKeyedProperty(reg, 0)
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.StoreNamedProperty(reg, name, 0, LanguageMode::SLOPPY)
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.StoreKeyedProperty(reg, reg, 0, LanguageMode::SLOPPY)
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.StoreNamedProperty(reg, name, 0, LanguageMode::STRICT)
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.StoreKeyedProperty(reg, reg, 0, LanguageMode::STRICT);
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// Emit load / store lookup slots.
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builder.LoadLookupSlot(name, TypeofMode::NOT_INSIDE_TYPEOF)
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.LoadLookupSlot(name, TypeofMode::INSIDE_TYPEOF)
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.StoreLookupSlot(name, LanguageMode::SLOPPY)
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.StoreLookupSlot(name, LanguageMode::STRICT);
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// Emit closure operations.
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Handle<SharedFunctionInfo> shared_info = factory->NewSharedFunctionInfo(
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factory->NewStringFromStaticChars("function_a"), MaybeHandle<Code>(),
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false);
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builder.CreateClosure(shared_info, NOT_TENURED);
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// Emit literal creation operations.
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builder.CreateRegExpLiteral(factory->NewStringFromStaticChars("a"), 0, 0)
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.CreateArrayLiteral(factory->NewFixedArray(1), 0, 0)
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.CreateObjectLiteral(factory->NewFixedArray(1), 0, 0);
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// Call operations.
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builder.Call(reg, other, 0, 1)
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.Call(reg, wide, 0, 1)
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.TailCall(reg, other, 0, 1)
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.TailCall(reg, wide, 0, 1)
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.CallRuntime(Runtime::kIsArray, reg, 1)
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.CallRuntime(Runtime::kIsArray, wide, 1)
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.CallRuntimeForPair(Runtime::kLoadLookupSlotForCall, reg, 1, other)
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.CallRuntimeForPair(Runtime::kLoadLookupSlotForCall, wide, 1, other)
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.CallJSRuntime(Context::SPREAD_ITERABLE_INDEX, reg, 1)
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.CallJSRuntime(Context::SPREAD_ITERABLE_INDEX, wide, 1);
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// Emit binary operator invocations.
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builder.BinaryOperation(Token::Value::ADD, reg)
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.BinaryOperation(Token::Value::SUB, reg)
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.BinaryOperation(Token::Value::MUL, reg)
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.BinaryOperation(Token::Value::DIV, reg)
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.BinaryOperation(Token::Value::MOD, reg);
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// Emit bitwise operator invocations
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builder.BinaryOperation(Token::Value::BIT_OR, reg)
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.BinaryOperation(Token::Value::BIT_XOR, reg)
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.BinaryOperation(Token::Value::BIT_AND, reg);
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// Emit shift operator invocations
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builder.BinaryOperation(Token::Value::SHL, reg)
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.BinaryOperation(Token::Value::SAR, reg)
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.BinaryOperation(Token::Value::SHR, reg);
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// Emit peephole optimizations of LdaSmi followed by binary operation.
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builder.LoadLiteral(Smi::FromInt(1))
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.BinaryOperation(Token::Value::ADD, reg)
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.LoadLiteral(Smi::FromInt(2))
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.BinaryOperation(Token::Value::SUB, reg)
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.LoadLiteral(Smi::FromInt(3))
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.BinaryOperation(Token::Value::BIT_AND, reg)
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.LoadLiteral(Smi::FromInt(4))
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.BinaryOperation(Token::Value::BIT_OR, reg)
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.LoadLiteral(Smi::FromInt(5))
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.BinaryOperation(Token::Value::SHL, reg)
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.LoadLiteral(Smi::FromInt(6))
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.BinaryOperation(Token::Value::SAR, reg);
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// Emit count operatior invocations
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builder.CountOperation(Token::Value::ADD).CountOperation(Token::Value::SUB);
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// Emit unary operator invocations.
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builder
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.LogicalNot() // ToBooleanLogicalNot
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.LogicalNot() // non-ToBoolean LogicalNot
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.TypeOf();
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// Emit delete
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builder.Delete(reg, LanguageMode::SLOPPY).Delete(reg, LanguageMode::STRICT);
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// Emit new.
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builder.New(reg, reg, 0);
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builder.New(wide, wide, 0);
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// Emit test operator invocations.
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builder.CompareOperation(Token::Value::EQ, reg)
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.CompareOperation(Token::Value::NE, reg)
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.CompareOperation(Token::Value::EQ_STRICT, reg)
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.CompareOperation(Token::Value::LT, reg)
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.CompareOperation(Token::Value::GT, reg)
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.CompareOperation(Token::Value::LTE, reg)
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.CompareOperation(Token::Value::GTE, reg)
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.CompareOperation(Token::Value::INSTANCEOF, reg)
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.CompareOperation(Token::Value::IN, reg);
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// Emit cast operator invocations.
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builder.CastAccumulatorToNumber()
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.CastAccumulatorToJSObject()
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.CastAccumulatorToName();
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// Emit control flow. Return must be the last instruction.
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BytecodeLabel start;
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builder.Bind(&start);
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{
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// Short jumps with Imm8 operands
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BytecodeLabel after_jump;
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builder.Jump(&start)
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.Bind(&after_jump)
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.JumpIfNull(&start)
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.JumpIfUndefined(&start)
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.JumpIfNotHole(&start);
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}
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// Longer jumps with constant operands
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BytecodeLabel end[8];
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{
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BytecodeLabel after_jump;
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builder.Jump(&end[0])
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.Bind(&after_jump)
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.LoadTrue()
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.JumpIfTrue(&end[1])
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.LoadTrue()
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.JumpIfFalse(&end[2])
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.LoadLiteral(Smi::FromInt(0))
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.JumpIfTrue(&end[3])
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.LoadLiteral(Smi::FromInt(0))
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.JumpIfFalse(&end[4])
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.JumpIfNull(&end[5])
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.JumpIfUndefined(&end[6])
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.JumpIfNotHole(&end[7]);
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}
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// Perform an operation that returns boolean value to
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// generate JumpIfTrue/False
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builder.CompareOperation(Token::Value::EQ, reg)
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.JumpIfTrue(&start)
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.CompareOperation(Token::Value::EQ, reg)
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.JumpIfFalse(&start);
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// Perform an operation that returns a non-boolean operation to
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// generate JumpIfToBooleanTrue/False.
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builder.BinaryOperation(Token::Value::ADD, reg)
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.JumpIfTrue(&start)
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.BinaryOperation(Token::Value::ADD, reg)
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.JumpIfFalse(&start);
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// Insert dummy ops to force longer jumps
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for (int i = 0; i < 128; i++) {
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builder.LoadTrue();
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}
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// Longer jumps requiring Constant operand
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{
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BytecodeLabel after_jump;
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builder.Jump(&start)
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.Bind(&after_jump)
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.JumpIfNull(&start)
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.JumpIfUndefined(&start)
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.JumpIfNotHole(&start);
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// Perform an operation that returns boolean value to
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// generate JumpIfTrue/False
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builder.CompareOperation(Token::Value::EQ, reg)
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.JumpIfTrue(&start)
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.CompareOperation(Token::Value::EQ, reg)
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.JumpIfFalse(&start);
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// Perform an operation that returns a non-boolean operation to
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// generate JumpIfToBooleanTrue/False.
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builder.BinaryOperation(Token::Value::ADD, reg)
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.JumpIfTrue(&start)
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.BinaryOperation(Token::Value::ADD, reg)
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.JumpIfFalse(&start);
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}
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// Emit stack check bytecode.
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builder.StackCheck(0);
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// Emit throw and re-throw in it's own basic block so that the rest of the
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// code isn't omitted due to being dead.
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BytecodeLabel after_throw;
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builder.Throw().Bind(&after_throw);
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BytecodeLabel after_rethrow;
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builder.ReThrow().Bind(&after_rethrow);
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builder.ForInPrepare(reg)
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.ForInDone(reg, reg)
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.ForInNext(reg, reg, reg, 1)
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.ForInStep(reg);
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builder.ForInPrepare(wide)
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.ForInDone(reg, other)
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.ForInNext(wide, wide, wide, 1024)
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.ForInStep(reg);
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// Wide constant pool loads
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for (int i = 0; i < 256; i++) {
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// Emit junk in constant pool to force wide constant pool index.
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builder.LoadLiteral(factory->NewNumber(2.5321 + i));
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}
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builder.LoadLiteral(Smi::FromInt(20000000));
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Handle<String> wide_name = factory->NewStringFromStaticChars("var_wide_name");
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// Emit wide global load / store operations.
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builder.LoadGlobal(1024, TypeofMode::NOT_INSIDE_TYPEOF)
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.LoadGlobal(1024, TypeofMode::INSIDE_TYPEOF)
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.LoadGlobal(1024, TypeofMode::INSIDE_TYPEOF)
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.StoreGlobal(name, 1024, LanguageMode::SLOPPY)
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.StoreGlobal(wide_name, 1, LanguageMode::STRICT);
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// Emit extra wide global load.
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builder.LoadGlobal(1024 * 1024, TypeofMode::NOT_INSIDE_TYPEOF);
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// Emit wide load / store property operations.
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builder.LoadNamedProperty(reg, wide_name, 0)
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.LoadKeyedProperty(reg, 2056)
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.StoreNamedProperty(reg, wide_name, 0, LanguageMode::SLOPPY)
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.StoreKeyedProperty(reg, reg, 2056, LanguageMode::SLOPPY)
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.StoreNamedProperty(reg, wide_name, 0, LanguageMode::STRICT)
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.StoreKeyedProperty(reg, reg, 2056, LanguageMode::STRICT);
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// Emit wide context operations.
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builder.LoadContextSlot(reg, 1024).StoreContextSlot(reg, 1024);
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// Emit wide load / store lookup slots.
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builder.LoadLookupSlot(wide_name, TypeofMode::NOT_INSIDE_TYPEOF)
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.LoadLookupSlot(wide_name, TypeofMode::INSIDE_TYPEOF)
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.StoreLookupSlot(wide_name, LanguageMode::SLOPPY)
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.StoreLookupSlot(wide_name, LanguageMode::STRICT);
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// Emit loads which will be transformed to Ldr equivalents by the peephole
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// optimizer.
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builder.LoadNamedProperty(reg, name, 0)
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.StoreAccumulatorInRegister(reg)
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.LoadKeyedProperty(reg, 0)
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.StoreAccumulatorInRegister(reg)
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.LoadContextSlot(reg, 1)
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.StoreAccumulatorInRegister(reg)
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.LoadGlobal(0, TypeofMode::NOT_INSIDE_TYPEOF)
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.StoreAccumulatorInRegister(reg)
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.LoadUndefined()
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.StoreAccumulatorInRegister(reg);
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// CreateClosureWide
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Handle<SharedFunctionInfo> shared_info2 = factory->NewSharedFunctionInfo(
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factory->NewStringFromStaticChars("function_b"), MaybeHandle<Code>(),
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false);
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builder.CreateClosure(shared_info2, NOT_TENURED);
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// Emit wide variant of literal creation operations.
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builder.CreateRegExpLiteral(factory->NewStringFromStaticChars("wide_literal"),
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0, 0)
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.CreateArrayLiteral(factory->NewFixedArray(2), 0, 0)
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.CreateObjectLiteral(factory->NewFixedArray(2), 0, 0);
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// Longer jumps requiring ConstantWide operand
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{
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BytecodeLabel after_jump;
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builder.Jump(&start)
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.Bind(&after_jump)
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.JumpIfNull(&start)
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.JumpIfUndefined(&start)
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.JumpIfNotHole(&start);
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}
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// Perform an operation that returns boolean value to
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// generate JumpIfTrue/False
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builder.CompareOperation(Token::Value::EQ, reg)
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.JumpIfTrue(&start)
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.CompareOperation(Token::Value::EQ, reg)
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.JumpIfFalse(&start);
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// Perform an operation that returns a non-boolean operation to
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// generate JumpIfToBooleanTrue/False.
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builder.BinaryOperation(Token::Value::ADD, reg)
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.JumpIfTrue(&start)
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.BinaryOperation(Token::Value::ADD, reg)
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.JumpIfFalse(&start);
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// Emit generator operations
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builder.SuspendGenerator(reg)
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.ResumeGenerator(reg);
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// Intrinsics handled by the interpreter.
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builder.CallRuntime(Runtime::kInlineIsArray, reg, 1)
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.CallRuntime(Runtime::kInlineIsArray, wide, 1);
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builder.Debugger();
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for (size_t i = 0; i < arraysize(end); i++) {
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builder.Bind(&end[i]);
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}
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builder.Return();
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// Generate BytecodeArray.
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Handle<BytecodeArray> the_array = builder.ToBytecodeArray();
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CHECK_EQ(the_array->frame_size(),
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builder.fixed_and_temporary_register_count() * kPointerSize);
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// Build scorecard of bytecodes encountered in the BytecodeArray.
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std::vector<int> scorecard(Bytecodes::ToByte(Bytecode::kLast) + 1);
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Bytecode final_bytecode = Bytecode::kLdaZero;
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int i = 0;
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while (i < the_array->length()) {
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uint8_t code = the_array->get(i);
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scorecard[code] += 1;
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final_bytecode = Bytecodes::FromByte(code);
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OperandScale operand_scale = OperandScale::kSingle;
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int prefix_offset = 0;
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if (Bytecodes::IsPrefixScalingBytecode(final_bytecode)) {
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operand_scale = Bytecodes::PrefixBytecodeToOperandScale(final_bytecode);
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prefix_offset = 1;
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code = the_array->get(i + 1);
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final_bytecode = Bytecodes::FromByte(code);
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}
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i += prefix_offset + Bytecodes::Size(final_bytecode, operand_scale);
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}
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// Insert entry for illegal bytecode as this is never willingly emitted.
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scorecard[Bytecodes::ToByte(Bytecode::kIllegal)] = 1;
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// Insert entry for nop bytecode as this often gets optimized out.
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scorecard[Bytecodes::ToByte(Bytecode::kNop)] = 1;
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if (!FLAG_ignition_peephole) {
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// Insert entries for bytecodes only emitted by peephole optimizer.
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scorecard[Bytecodes::ToByte(Bytecode::kLdrNamedProperty)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kLdrKeyedProperty)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kLdrGlobal)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kLdrContextSlot)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kLdrUndefined)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kLogicalNot)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kJump)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kJumpIfTrue)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kJumpIfFalse)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kJumpIfTrueConstant)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kJumpIfFalseConstant)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kAddSmi)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kSubSmi)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kBitwiseAndSmi)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kBitwiseOrSmi)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kShiftLeftSmi)] = 1;
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scorecard[Bytecodes::ToByte(Bytecode::kShiftRightSmi)] = 1;
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}
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// Check return occurs at the end and only once in the BytecodeArray.
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CHECK_EQ(final_bytecode, Bytecode::kReturn);
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CHECK_EQ(scorecard[Bytecodes::ToByte(final_bytecode)], 1);
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#define CHECK_BYTECODE_PRESENT(Name, ...) \
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/* Check Bytecode is marked in scorecard, unless it's a debug break */ \
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if (!Bytecodes::IsDebugBreak(Bytecode::k##Name)) { \
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CHECK_GE(scorecard[Bytecodes::ToByte(Bytecode::k##Name)], 1); \
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}
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BYTECODE_LIST(CHECK_BYTECODE_PRESENT)
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#undef CHECK_BYTECODE_PRESENT
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}
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TEST_F(BytecodeArrayBuilderTest, FrameSizesLookGood) {
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for (int locals = 0; locals < 5; locals++) {
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for (int contexts = 0; contexts < 4; contexts++) {
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for (int temps = 0; temps < 3; temps++) {
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BytecodeArrayBuilder builder(isolate(), zone(), 0, contexts, locals);
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BytecodeRegisterAllocator temporaries(
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zone(), builder.temporary_register_allocator());
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for (int i = 0; i < locals + contexts; i++) {
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builder.LoadLiteral(Smi::FromInt(0));
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builder.StoreAccumulatorInRegister(Register(i));
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}
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for (int i = 0; i < temps; i++) {
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builder.LoadLiteral(Smi::FromInt(0));
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builder.StoreAccumulatorInRegister(temporaries.NewRegister());
|
|
}
|
|
if (temps > 0) {
|
|
// Ensure temporaries are used so not optimized away by the
|
|
// register optimizer.
|
|
builder.New(Register(locals + contexts), Register(locals + contexts),
|
|
static_cast<size_t>(temps));
|
|
}
|
|
builder.Return();
|
|
|
|
Handle<BytecodeArray> the_array = builder.ToBytecodeArray();
|
|
int total_registers = locals + contexts + temps;
|
|
CHECK_EQ(the_array->frame_size(), total_registers * kPointerSize);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, RegisterValues) {
|
|
int index = 1;
|
|
|
|
Register the_register(index);
|
|
CHECK_EQ(the_register.index(), index);
|
|
|
|
int actual_operand = the_register.ToOperand();
|
|
int actual_index = Register::FromOperand(actual_operand).index();
|
|
CHECK_EQ(actual_index, index);
|
|
}
|
|
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, Parameters) {
|
|
BytecodeArrayBuilder builder(isolate(), zone(), 10, 0, 0);
|
|
|
|
Register param0(builder.Parameter(0));
|
|
Register param9(builder.Parameter(9));
|
|
CHECK_EQ(param9.index() - param0.index(), 9);
|
|
}
|
|
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, RegisterType) {
|
|
BytecodeArrayBuilder builder(isolate(), zone(), 10, 0, 3);
|
|
BytecodeRegisterAllocator register_allocator(
|
|
zone(), builder.temporary_register_allocator());
|
|
Register temp0 = register_allocator.NewRegister();
|
|
Register param0(builder.Parameter(0));
|
|
Register param9(builder.Parameter(9));
|
|
Register temp1 = register_allocator.NewRegister();
|
|
Register reg0(0);
|
|
Register reg1(1);
|
|
Register reg2(2);
|
|
Register temp2 = register_allocator.NewRegister();
|
|
CHECK_EQ(builder.RegisterIsParameterOrLocal(temp0), false);
|
|
CHECK_EQ(builder.RegisterIsParameterOrLocal(temp1), false);
|
|
CHECK_EQ(builder.RegisterIsParameterOrLocal(temp2), false);
|
|
CHECK_EQ(builder.RegisterIsParameterOrLocal(param0), true);
|
|
CHECK_EQ(builder.RegisterIsParameterOrLocal(param9), true);
|
|
CHECK_EQ(builder.RegisterIsParameterOrLocal(reg0), true);
|
|
CHECK_EQ(builder.RegisterIsParameterOrLocal(reg1), true);
|
|
CHECK_EQ(builder.RegisterIsParameterOrLocal(reg2), true);
|
|
}
|
|
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, Constants) {
|
|
BytecodeArrayBuilder builder(isolate(), zone(), 0, 0, 0);
|
|
|
|
Factory* factory = isolate()->factory();
|
|
Handle<HeapObject> heap_num_1 = factory->NewHeapNumber(3.14);
|
|
Handle<HeapObject> heap_num_2 = factory->NewHeapNumber(5.2);
|
|
Handle<Object> large_smi(Smi::FromInt(0x12345678), isolate());
|
|
Handle<HeapObject> heap_num_2_copy(*heap_num_2);
|
|
builder.LoadLiteral(heap_num_1)
|
|
.LoadLiteral(heap_num_2)
|
|
.LoadLiteral(large_smi)
|
|
.LoadLiteral(heap_num_1)
|
|
.LoadLiteral(heap_num_1)
|
|
.LoadLiteral(heap_num_2_copy)
|
|
.Return();
|
|
|
|
Handle<BytecodeArray> array = builder.ToBytecodeArray();
|
|
// Should only have one entry for each identical constant.
|
|
CHECK_EQ(array->constant_pool()->length(), 3);
|
|
}
|
|
|
|
static Bytecode PeepholeToBoolean(Bytecode jump_bytecode) {
|
|
return FLAG_ignition_peephole
|
|
? Bytecodes::GetJumpWithoutToBoolean(jump_bytecode)
|
|
: jump_bytecode;
|
|
}
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, ForwardJumps) {
|
|
static const int kFarJumpDistance = 256;
|
|
|
|
BytecodeArrayBuilder builder(isolate(), zone(), 0, 0, 1);
|
|
|
|
Register reg(0);
|
|
BytecodeLabel far0, far1, far2, far3, far4;
|
|
BytecodeLabel near0, near1, near2, near3, near4;
|
|
BytecodeLabel after_jump0, after_jump1;
|
|
|
|
builder.Jump(&near0)
|
|
.Bind(&after_jump0)
|
|
.CompareOperation(Token::Value::EQ, reg)
|
|
.JumpIfTrue(&near1)
|
|
.CompareOperation(Token::Value::EQ, reg)
|
|
.JumpIfFalse(&near2)
|
|
.BinaryOperation(Token::Value::ADD, reg)
|
|
.JumpIfTrue(&near3)
|
|
.BinaryOperation(Token::Value::ADD, reg)
|
|
.JumpIfFalse(&near4)
|
|
.Bind(&near0)
|
|
.Bind(&near1)
|
|
.Bind(&near2)
|
|
.Bind(&near3)
|
|
.Bind(&near4)
|
|
.Jump(&far0)
|
|
.Bind(&after_jump1)
|
|
.CompareOperation(Token::Value::EQ, reg)
|
|
.JumpIfTrue(&far1)
|
|
.CompareOperation(Token::Value::EQ, reg)
|
|
.JumpIfFalse(&far2)
|
|
.BinaryOperation(Token::Value::ADD, reg)
|
|
.JumpIfTrue(&far3)
|
|
.BinaryOperation(Token::Value::ADD, reg)
|
|
.JumpIfFalse(&far4);
|
|
for (int i = 0; i < kFarJumpDistance - 18; i++) {
|
|
builder.Debugger();
|
|
}
|
|
builder.Bind(&far0).Bind(&far1).Bind(&far2).Bind(&far3).Bind(&far4);
|
|
builder.Return();
|
|
|
|
Handle<BytecodeArray> array = builder.ToBytecodeArray();
|
|
DCHECK_EQ(array->length(), 36 + kFarJumpDistance - 18 + 1);
|
|
|
|
BytecodeArrayIterator iterator(array);
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), 18);
|
|
iterator.Advance();
|
|
|
|
// Ignore compare operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(),
|
|
PeepholeToBoolean(Bytecode::kJumpIfToBooleanTrue));
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), 14);
|
|
iterator.Advance();
|
|
|
|
// Ignore compare operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(),
|
|
PeepholeToBoolean(Bytecode::kJumpIfToBooleanFalse));
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), 10);
|
|
iterator.Advance();
|
|
|
|
// Ignore add operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfToBooleanTrue);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), 6);
|
|
iterator.Advance();
|
|
|
|
// Ignore add operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfToBooleanFalse);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), 2);
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpConstant);
|
|
CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
|
|
Smi::FromInt(kFarJumpDistance));
|
|
iterator.Advance();
|
|
|
|
// Ignore compare operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(),
|
|
PeepholeToBoolean(Bytecode::kJumpIfToBooleanTrueConstant));
|
|
CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
|
|
Smi::FromInt(kFarJumpDistance - 4));
|
|
iterator.Advance();
|
|
|
|
// Ignore compare operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(),
|
|
PeepholeToBoolean(Bytecode::kJumpIfToBooleanFalseConstant));
|
|
CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
|
|
Smi::FromInt(kFarJumpDistance - 8));
|
|
iterator.Advance();
|
|
|
|
// Ignore add operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfToBooleanTrueConstant);
|
|
CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
|
|
Smi::FromInt(kFarJumpDistance - 12));
|
|
iterator.Advance();
|
|
|
|
// Ignore add operation.
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(),
|
|
Bytecode::kJumpIfToBooleanFalseConstant);
|
|
CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
|
|
Smi::FromInt(kFarJumpDistance - 16));
|
|
iterator.Advance();
|
|
}
|
|
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, BackwardJumps) {
|
|
BytecodeArrayBuilder builder(isolate(), zone(), 0, 0, 1);
|
|
|
|
Register reg(0);
|
|
|
|
BytecodeLabel label0, label1, label2, label3, label4;
|
|
builder.Bind(&label0)
|
|
.Jump(&label0)
|
|
.Bind(&label1)
|
|
.CompareOperation(Token::Value::EQ, reg)
|
|
.JumpIfTrue(&label1)
|
|
.Bind(&label2)
|
|
.CompareOperation(Token::Value::EQ, reg)
|
|
.JumpIfFalse(&label2)
|
|
.Bind(&label3)
|
|
.BinaryOperation(Token::Value::ADD, reg)
|
|
.JumpIfTrue(&label3)
|
|
.Bind(&label4)
|
|
.BinaryOperation(Token::Value::ADD, reg)
|
|
.JumpIfFalse(&label4);
|
|
for (int i = 0; i < 63; i++) {
|
|
BytecodeLabel after_jump;
|
|
builder.Jump(&label4).Bind(&after_jump);
|
|
}
|
|
|
|
// Add padding to force wide backwards jumps.
|
|
for (int i = 0; i < 256; i++) {
|
|
builder.Debugger();
|
|
}
|
|
|
|
builder.BinaryOperation(Token::Value::ADD, reg).JumpIfFalse(&label4);
|
|
builder.BinaryOperation(Token::Value::ADD, reg).JumpIfTrue(&label3);
|
|
builder.CompareOperation(Token::Value::EQ, reg).JumpIfFalse(&label2);
|
|
builder.CompareOperation(Token::Value::EQ, reg).JumpIfTrue(&label1);
|
|
builder.Jump(&label0);
|
|
BytecodeLabel end;
|
|
builder.Bind(&end);
|
|
builder.Return();
|
|
|
|
Handle<BytecodeArray> array = builder.ToBytecodeArray();
|
|
BytecodeArrayIterator iterator(array);
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), 0);
|
|
iterator.Advance();
|
|
// Ignore compare operation.
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(),
|
|
PeepholeToBoolean(Bytecode::kJumpIfToBooleanTrue));
|
|
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), -2);
|
|
iterator.Advance();
|
|
// Ignore compare operation.
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(),
|
|
PeepholeToBoolean(Bytecode::kJumpIfToBooleanFalse));
|
|
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), -2);
|
|
iterator.Advance();
|
|
// Ignore binary operation.
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfToBooleanTrue);
|
|
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), -2);
|
|
iterator.Advance();
|
|
// Ignore binary operation.
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfToBooleanFalse);
|
|
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), -2);
|
|
iterator.Advance();
|
|
for (int i = 0; i < 63; i++) {
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
|
|
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), -i * 2 - 4);
|
|
iterator.Advance();
|
|
}
|
|
// Check padding to force wide backwards jumps.
|
|
for (int i = 0; i < 256; i++) {
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kDebugger);
|
|
iterator.Advance();
|
|
}
|
|
// Ignore binary operation.
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfToBooleanFalse);
|
|
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kDouble);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), -389);
|
|
iterator.Advance();
|
|
// Ignore binary operation.
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfToBooleanTrue);
|
|
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kDouble);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), -399);
|
|
iterator.Advance();
|
|
// Ignore compare operation.
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(),
|
|
PeepholeToBoolean(Bytecode::kJumpIfToBooleanFalse));
|
|
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kDouble);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), -409);
|
|
iterator.Advance();
|
|
// Ignore compare operation.
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(),
|
|
PeepholeToBoolean(Bytecode::kJumpIfToBooleanTrue));
|
|
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kDouble);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), -419);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
|
|
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kDouble);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), -425);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
|
|
iterator.Advance();
|
|
CHECK(iterator.done());
|
|
}
|
|
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, LabelReuse) {
|
|
BytecodeArrayBuilder builder(isolate(), zone(), 0, 0, 0);
|
|
|
|
// Labels can only have 1 forward reference, but
|
|
// can be referred to mulitple times once bound.
|
|
BytecodeLabel label, after_jump0, after_jump1;
|
|
|
|
builder.Jump(&label)
|
|
.Bind(&label)
|
|
.Jump(&label)
|
|
.Bind(&after_jump0)
|
|
.Jump(&label)
|
|
.Bind(&after_jump1)
|
|
.Return();
|
|
|
|
Handle<BytecodeArray> array = builder.ToBytecodeArray();
|
|
BytecodeArrayIterator iterator(array);
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), 2);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), 0);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), -2);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
|
|
iterator.Advance();
|
|
CHECK(iterator.done());
|
|
}
|
|
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, LabelAddressReuse) {
|
|
static const int kRepeats = 3;
|
|
|
|
BytecodeArrayBuilder builder(isolate(), zone(), 0, 0, 0);
|
|
for (int i = 0; i < kRepeats; i++) {
|
|
BytecodeLabel label, after_jump0, after_jump1;
|
|
builder.Jump(&label)
|
|
.Bind(&label)
|
|
.Jump(&label)
|
|
.Bind(&after_jump0)
|
|
.Jump(&label)
|
|
.Bind(&after_jump1);
|
|
}
|
|
builder.Return();
|
|
|
|
Handle<BytecodeArray> array = builder.ToBytecodeArray();
|
|
BytecodeArrayIterator iterator(array);
|
|
for (int i = 0; i < kRepeats; i++) {
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), 2);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), 0);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
|
|
CHECK_EQ(iterator.GetImmediateOperand(0), -2);
|
|
iterator.Advance();
|
|
}
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
|
|
iterator.Advance();
|
|
CHECK(iterator.done());
|
|
}
|
|
|
|
} // namespace interpreter
|
|
} // namespace internal
|
|
} // namespace v8
|