14b31970e7
The plan is to implement the same idea using vector IC machinery. Stubs implementations and scopes modifications are left untouched for now. Review URL: https://codereview.chromium.org/1419823003 Cr-Commit-Position: refs/heads/master@{#31458}
532 lines
17 KiB
C++
532 lines
17 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 "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());
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builder.set_locals_count(1);
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builder.set_context_count(1);
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builder.set_parameter_count(0);
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CHECK_EQ(builder.locals_count(), 1);
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CHECK_EQ(builder.context_count(), 1);
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CHECK_EQ(builder.fixed_register_count(), 2);
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// Emit constant loads.
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builder.LoadLiteral(Smi::FromInt(0))
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.LoadLiteral(Smi::FromInt(8))
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.LoadLiteral(Smi::FromInt(10000000))
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.LoadUndefined()
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.LoadNull()
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.LoadTheHole()
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.LoadTrue()
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.LoadFalse();
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// Emit accumulator transfers.
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Register reg(0);
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builder.LoadAccumulatorWithRegister(reg).StoreAccumulatorInRegister(reg);
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// Emit context operations.
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builder.PushContext(reg);
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builder.PopContext(reg);
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builder.LoadContextSlot(reg, 1);
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builder.StoreContextSlot(reg, 1);
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// Emit load / store property operations.
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builder.LoadNamedProperty(reg, 0, LanguageMode::SLOPPY)
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.LoadKeyedProperty(reg, 0, LanguageMode::SLOPPY)
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.StoreNamedProperty(reg, reg, 0, LanguageMode::SLOPPY)
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.StoreKeyedProperty(reg, reg, 0, LanguageMode::SLOPPY)
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.LoadNamedProperty(reg, 0, LanguageMode::STRICT)
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.LoadKeyedProperty(reg, 0, LanguageMode::STRICT)
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.StoreNamedProperty(reg, reg, 0, LanguageMode::STRICT)
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.StoreKeyedProperty(reg, reg, 0, LanguageMode::STRICT);
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// Emit closure operations.
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builder.CreateClosure(NOT_TENURED);
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// Emit literal creation operations
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builder.CreateRegExpLiteral(0, reg)
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.CreateArrayLiteral(0, 0)
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.CreateObjectLiteral(0, 0);
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// Call operations.
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builder.Call(reg, reg, 0);
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builder.CallRuntime(Runtime::kIsArray, reg, 1);
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// Emit binary operator invocations.
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builder.BinaryOperation(Token::Value::ADD, reg, Strength::WEAK)
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.BinaryOperation(Token::Value::SUB, reg, Strength::WEAK)
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.BinaryOperation(Token::Value::MUL, reg, Strength::WEAK)
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.BinaryOperation(Token::Value::DIV, reg, Strength::WEAK)
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.BinaryOperation(Token::Value::MOD, reg, Strength::WEAK);
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// Emit bitwise operator invocations
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builder.BinaryOperation(Token::Value::BIT_OR, reg, Strength::WEAK)
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.BinaryOperation(Token::Value::BIT_XOR, reg, Strength::WEAK)
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.BinaryOperation(Token::Value::BIT_AND, reg, Strength::WEAK);
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// Emit shift operator invocations
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builder.BinaryOperation(Token::Value::SHL, reg, Strength::WEAK)
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.BinaryOperation(Token::Value::SAR, reg, Strength::WEAK)
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.BinaryOperation(Token::Value::SHR, reg, Strength::WEAK);
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// Emit unary operator invocations.
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builder.LogicalNot().TypeOf();
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// Emit new.
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builder.New(reg, reg, 0);
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// Emit test operator invocations.
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builder.CompareOperation(Token::Value::EQ, reg, Strength::WEAK)
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.CompareOperation(Token::Value::NE, reg, Strength::WEAK)
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.CompareOperation(Token::Value::EQ_STRICT, reg, Strength::WEAK)
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.CompareOperation(Token::Value::NE_STRICT, reg, Strength::WEAK)
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.CompareOperation(Token::Value::LT, reg, Strength::WEAK)
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.CompareOperation(Token::Value::GT, reg, Strength::WEAK)
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.CompareOperation(Token::Value::LTE, reg, Strength::WEAK)
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.CompareOperation(Token::Value::GTE, reg, Strength::WEAK)
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.CompareOperation(Token::Value::INSTANCEOF, reg, Strength::WEAK)
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.CompareOperation(Token::Value::IN, reg, Strength::WEAK);
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// Emit cast operator invocations.
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builder.LoadNull()
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.CastAccumulatorToBoolean()
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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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// Short jumps with Imm8 operands
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builder.Jump(&start)
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.JumpIfTrue(&start)
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.JumpIfFalse(&start)
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.JumpIfToBooleanTrue(&start)
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.JumpIfToBooleanFalse(&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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builder.Jump(&start)
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.JumpIfTrue(&start)
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.JumpIfFalse(&start)
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.JumpIfToBooleanTrue(&start)
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.JumpIfToBooleanFalse(&start);
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builder.EnterBlock()
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.Throw()
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.LeaveBlock();
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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_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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i += Bytecodes::Size(Bytecodes::FromByte(code));
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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 */ \
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CHECK_GE(scorecard[Bytecodes::ToByte(Bytecode::k##Name)], 1);
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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());
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builder.set_parameter_count(0);
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builder.set_locals_count(locals);
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builder.set_context_count(contexts);
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TemporaryRegisterScope temporaries(&builder);
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for (int i = 0; i < temps; i++) {
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builder.StoreAccumulatorInRegister(temporaries.NewRegister());
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}
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builder.Return();
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Handle<BytecodeArray> the_array = builder.ToBytecodeArray();
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int total_registers = locals + contexts + temps;
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CHECK_EQ(the_array->frame_size(), total_registers * kPointerSize);
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}
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}
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}
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}
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TEST_F(BytecodeArrayBuilderTest, TemporariesRecycled) {
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BytecodeArrayBuilder builder(isolate(), zone());
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builder.set_parameter_count(0);
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builder.set_locals_count(0);
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builder.set_context_count(0);
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builder.Return();
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int first;
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{
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TemporaryRegisterScope temporaries(&builder);
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first = temporaries.NewRegister().index();
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temporaries.NewRegister();
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temporaries.NewRegister();
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temporaries.NewRegister();
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}
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int second;
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{
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TemporaryRegisterScope temporaries(&builder);
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second = temporaries.NewRegister().index();
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}
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CHECK_EQ(first, second);
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}
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TEST_F(BytecodeArrayBuilderTest, RegisterValues) {
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int index = 1;
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uint8_t operand = static_cast<uint8_t>(-index);
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Register the_register(index);
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CHECK_EQ(the_register.index(), index);
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int actual_operand = the_register.ToOperand();
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CHECK_EQ(actual_operand, operand);
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int actual_index = Register::FromOperand(actual_operand).index();
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CHECK_EQ(actual_index, index);
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}
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TEST_F(BytecodeArrayBuilderTest, Parameters) {
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BytecodeArrayBuilder builder(isolate(), zone());
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builder.set_parameter_count(10);
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builder.set_locals_count(0);
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builder.set_context_count(0);
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Register param0(builder.Parameter(0));
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Register param9(builder.Parameter(9));
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CHECK_EQ(param9.index() - param0.index(), 9);
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}
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TEST_F(BytecodeArrayBuilderTest, RegisterType) {
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BytecodeArrayBuilder builder(isolate(), zone());
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builder.set_parameter_count(10);
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builder.set_locals_count(3);
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builder.set_context_count(0);
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TemporaryRegisterScope temporary_register_scope(&builder);
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Register temp0 = temporary_register_scope.NewRegister();
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Register param0(builder.Parameter(0));
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Register param9(builder.Parameter(9));
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Register temp1 = temporary_register_scope.NewRegister();
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Register reg0(0);
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Register reg1(1);
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Register reg2(2);
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Register temp2 = temporary_register_scope.NewRegister();
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CHECK_EQ(builder.RegisterIsParameterOrLocal(temp0), false);
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CHECK_EQ(builder.RegisterIsParameterOrLocal(temp1), false);
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CHECK_EQ(builder.RegisterIsParameterOrLocal(temp2), false);
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CHECK_EQ(builder.RegisterIsParameterOrLocal(param0), true);
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CHECK_EQ(builder.RegisterIsParameterOrLocal(param9), true);
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CHECK_EQ(builder.RegisterIsParameterOrLocal(reg0), true);
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CHECK_EQ(builder.RegisterIsParameterOrLocal(reg1), true);
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CHECK_EQ(builder.RegisterIsParameterOrLocal(reg2), true);
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}
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TEST_F(BytecodeArrayBuilderTest, Constants) {
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BytecodeArrayBuilder builder(isolate(), zone());
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builder.set_parameter_count(0);
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builder.set_locals_count(0);
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builder.set_context_count(0);
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Factory* factory = isolate()->factory();
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Handle<HeapObject> heap_num_1 = factory->NewHeapNumber(3.14);
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Handle<HeapObject> heap_num_2 = factory->NewHeapNumber(5.2);
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Handle<Object> large_smi(Smi::FromInt(0x12345678), isolate());
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Handle<HeapObject> heap_num_2_copy(*heap_num_2);
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builder.LoadLiteral(heap_num_1)
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.LoadLiteral(heap_num_2)
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.LoadLiteral(large_smi)
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.LoadLiteral(heap_num_1)
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.LoadLiteral(heap_num_1)
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.LoadLiteral(heap_num_2_copy);
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Handle<BytecodeArray> array = builder.ToBytecodeArray();
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// Should only have one entry for each identical constant.
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CHECK_EQ(array->constant_pool()->length(), 3);
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}
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TEST_F(BytecodeArrayBuilderTest, ForwardJumps) {
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static const int kFarJumpDistance = 256;
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BytecodeArrayBuilder builder(isolate(), zone());
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builder.set_parameter_count(0);
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builder.set_locals_count(0);
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builder.set_context_count(0);
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BytecodeLabel far0, far1, far2;
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BytecodeLabel near0, near1, near2;
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builder.Jump(&near0)
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.JumpIfTrue(&near1)
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.JumpIfFalse(&near2)
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.Bind(&near0)
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.Bind(&near1)
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.Bind(&near2)
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.Jump(&far0)
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.JumpIfTrue(&far1)
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.JumpIfFalse(&far2);
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for (int i = 0; i < kFarJumpDistance - 6; i++) {
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builder.LoadUndefined();
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}
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builder.Bind(&far0).Bind(&far1).Bind(&far2);
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builder.Return();
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Handle<BytecodeArray> array = builder.ToBytecodeArray();
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DCHECK_EQ(array->length(), 12 + kFarJumpDistance - 6 + 1);
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BytecodeArrayIterator iterator(array);
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
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CHECK_EQ(iterator.GetImmediateOperand(0), 6);
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfTrue);
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CHECK_EQ(iterator.GetImmediateOperand(0), 4);
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfFalse);
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CHECK_EQ(iterator.GetImmediateOperand(0), 2);
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpConstant);
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CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
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Smi::FromInt(kFarJumpDistance));
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CHECK_EQ(
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array->get(iterator.current_offset() +
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Smi::cast(*iterator.GetConstantForIndexOperand(0))->value()),
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Bytecodes::ToByte(Bytecode::kReturn));
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfTrueConstant);
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CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
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Smi::FromInt(kFarJumpDistance - 2));
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CHECK_EQ(
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array->get(iterator.current_offset() +
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Smi::cast(*iterator.GetConstantForIndexOperand(0))->value()),
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Bytecodes::ToByte(Bytecode::kReturn));
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfFalseConstant);
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CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
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Smi::FromInt(kFarJumpDistance - 4));
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CHECK_EQ(
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array->get(iterator.current_offset() +
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Smi::cast(*iterator.GetConstantForIndexOperand(0))->value()),
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Bytecodes::ToByte(Bytecode::kReturn));
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iterator.Advance();
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}
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TEST_F(BytecodeArrayBuilderTest, BackwardJumps) {
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BytecodeArrayBuilder builder(isolate(), zone());
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builder.set_parameter_count(0);
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builder.set_locals_count(0);
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builder.set_context_count(0);
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BytecodeLabel label0, label1, label2;
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builder.Bind(&label0)
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.Jump(&label0)
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.Bind(&label1)
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.JumpIfTrue(&label1)
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.Bind(&label2)
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.JumpIfFalse(&label2);
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for (int i = 0; i < 64; i++) {
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builder.Jump(&label2);
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}
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builder.JumpIfFalse(&label2);
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builder.JumpIfTrue(&label1);
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builder.Jump(&label0);
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builder.Return();
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Handle<BytecodeArray> array = builder.ToBytecodeArray();
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BytecodeArrayIterator iterator(array);
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
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CHECK_EQ(iterator.GetImmediateOperand(0), 0);
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfTrue);
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CHECK_EQ(iterator.GetImmediateOperand(0), 0);
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfFalse);
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CHECK_EQ(iterator.GetImmediateOperand(0), 0);
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iterator.Advance();
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for (int i = 0; i < 64; i++) {
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
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CHECK_EQ(iterator.GetImmediateOperand(0), -i * 2 - 2);
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iterator.Advance();
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}
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfFalseConstant);
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CHECK_EQ(Smi::cast(*iterator.GetConstantForIndexOperand(0))->value(), -130);
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfTrueConstant);
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CHECK_EQ(Smi::cast(*iterator.GetConstantForIndexOperand(0))->value(), -134);
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpConstant);
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CHECK_EQ(Smi::cast(*iterator.GetConstantForIndexOperand(0))->value(), -138);
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
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iterator.Advance();
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CHECK(iterator.done());
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}
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TEST_F(BytecodeArrayBuilderTest, LabelReuse) {
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BytecodeArrayBuilder builder(isolate(), zone());
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builder.set_parameter_count(0);
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builder.set_locals_count(0);
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builder.set_context_count(0);
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// Labels can only have 1 forward reference, but
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// can be referred to mulitple times once bound.
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BytecodeLabel label;
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builder.Jump(&label).Bind(&label).Jump(&label).Jump(&label).Return();
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Handle<BytecodeArray> array = builder.ToBytecodeArray();
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BytecodeArrayIterator iterator(array);
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
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CHECK_EQ(iterator.GetImmediateOperand(0), 2);
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
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CHECK_EQ(iterator.GetImmediateOperand(0), 0);
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
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CHECK_EQ(iterator.GetImmediateOperand(0), -2);
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
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iterator.Advance();
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CHECK(iterator.done());
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}
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TEST_F(BytecodeArrayBuilderTest, LabelAddressReuse) {
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static const int kRepeats = 3;
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BytecodeArrayBuilder builder(isolate(), zone());
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builder.set_parameter_count(0);
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builder.set_locals_count(0);
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builder.set_context_count(0);
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for (int i = 0; i < kRepeats; i++) {
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BytecodeLabel label;
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builder.Jump(&label).Bind(&label).Jump(&label).Jump(&label);
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}
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builder.Return();
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Handle<BytecodeArray> array = builder.ToBytecodeArray();
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BytecodeArrayIterator iterator(array);
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for (int i = 0; i < kRepeats; i++) {
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
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CHECK_EQ(iterator.GetImmediateOperand(0), 2);
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
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CHECK_EQ(iterator.GetImmediateOperand(0), 0);
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iterator.Advance();
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
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CHECK_EQ(iterator.GetImmediateOperand(0), -2);
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iterator.Advance();
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}
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CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
|
|
iterator.Advance();
|
|
CHECK(iterator.done());
|
|
}
|
|
|
|
|
|
TEST_F(BytecodeArrayBuilderTest, ToBoolean) {
|
|
BytecodeArrayBuilder builder(isolate(), zone());
|
|
builder.set_parameter_count(0);
|
|
builder.set_locals_count(0);
|
|
builder.set_context_count(0);
|
|
|
|
// Check ToBoolean emitted at start of block.
|
|
builder.EnterBlock().CastAccumulatorToBoolean();
|
|
|
|
// Check ToBoolean emitted preceding bytecode is non-boolean.
|
|
builder.LoadNull().CastAccumulatorToBoolean();
|
|
|
|
// Check ToBoolean omitted if preceding bytecode is boolean.
|
|
builder.LoadFalse().CastAccumulatorToBoolean();
|
|
|
|
// Check ToBoolean emitted if it is at the start of the next block.
|
|
builder.LoadFalse()
|
|
.LeaveBlock()
|
|
.EnterBlock()
|
|
.CastAccumulatorToBoolean()
|
|
.LeaveBlock();
|
|
|
|
builder.Return();
|
|
|
|
Handle<BytecodeArray> array = builder.ToBytecodeArray();
|
|
BytecodeArrayIterator iterator(array);
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kToBoolean);
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kLdaNull);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kToBoolean);
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kLdaFalse);
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kLdaFalse);
|
|
iterator.Advance();
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kToBoolean);
|
|
iterator.Advance();
|
|
|
|
CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
|
|
iterator.Advance();
|
|
CHECK(iterator.done());
|
|
}
|
|
|
|
|
|
} // namespace interpreter
|
|
} // namespace internal
|
|
} // namespace v8
|