v8/test/unittests/interpreter/bytecode-array-builder-unittest.cc

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// Copyright 2014 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-iterator.h"
#include "src/interpreter/bytecode-label.h"
#include "src/interpreter/bytecode-register-allocator.h"
#include "test/unittests/test-utils.h"
namespace v8 {
namespace internal {
namespace interpreter {
class BytecodeArrayBuilderTest : public TestWithIsolateAndZone {
public:
BytecodeArrayBuilderTest() {}
~BytecodeArrayBuilderTest() override {}
};
TEST_F(BytecodeArrayBuilderTest, AllBytecodesGenerated) {
CanonicalHandleScope canonical(isolate());
BytecodeArrayBuilder builder(isolate(), zone(), 0, 1, 131);
Factory* factory = isolate()->factory();
CHECK_EQ(builder.locals_count(), 131);
CHECK_EQ(builder.context_count(), 1);
CHECK_EQ(builder.fixed_register_count(), 132);
Register reg(0);
Register other(reg.index() + 1);
Register wide(128);
[runtime] Optimize and unify rest parameters. Replace the somewhat awkward RestParamAccessStub, which would always call into the runtime anyway with a proper FastNewRestParameterStub, which is basically based on the code that was already there for strict arguments object materialization. But for rest parameters we could optimize even further (leading to 8-10x improvements for functions with rest parameters), by fixing the internal formal parameter count: Every SharedFunctionInfo has a formal_parameter_count field, which specifies the number of formal parameters, and is used to decide whether we need to create an arguments adaptor frame when calling a function (i.e. if there's a mismatch between the actual and expected parameters). Previously the formal_parameter_count included the rest parameter, which was sort of unfortunate, as that meant that calling a function with only the non-rest parameters still required an arguments adaptor (plus some other oddities). Now with this CL we fix, so that we do no longer include the rest parameter in that count. Thereby checking for rest parameters is very efficient, as we only need to check whether there is an arguments adaptor frame, and if not create an empty array, otherwise check whether the arguments adaptor frame has more parameters than specified by the formal_parameter_count. The FastNewRestParameterStub is written in a way that it can be directly used by Ignition as well, and with some tweaks to the TurboFan backends and the CodeStubAssembler, we should be able to rewrite it as TurboFanCodeStub in the near future. Drive-by-fix: Refactor and unify the CreateArgumentsType which was different in TurboFan and Ignition; now we have a single enum class which is used in both TurboFan and Ignition. R=jarin@chromium.org, rmcilroy@chromium.org TBR=rossberg@chromium.org BUG=v8:2159 LOG=n Review URL: https://codereview.chromium.org/1676883002 Cr-Commit-Position: refs/heads/master@{#33809}
2016-02-08 10:08:21 +00:00
// Emit argument creation operations.
builder.CreateArguments(CreateArgumentsType::kMappedArguments)
.CreateArguments(CreateArgumentsType::kUnmappedArguments)
[runtime] Optimize and unify rest parameters. Replace the somewhat awkward RestParamAccessStub, which would always call into the runtime anyway with a proper FastNewRestParameterStub, which is basically based on the code that was already there for strict arguments object materialization. But for rest parameters we could optimize even further (leading to 8-10x improvements for functions with rest parameters), by fixing the internal formal parameter count: Every SharedFunctionInfo has a formal_parameter_count field, which specifies the number of formal parameters, and is used to decide whether we need to create an arguments adaptor frame when calling a function (i.e. if there's a mismatch between the actual and expected parameters). Previously the formal_parameter_count included the rest parameter, which was sort of unfortunate, as that meant that calling a function with only the non-rest parameters still required an arguments adaptor (plus some other oddities). Now with this CL we fix, so that we do no longer include the rest parameter in that count. Thereby checking for rest parameters is very efficient, as we only need to check whether there is an arguments adaptor frame, and if not create an empty array, otherwise check whether the arguments adaptor frame has more parameters than specified by the formal_parameter_count. The FastNewRestParameterStub is written in a way that it can be directly used by Ignition as well, and with some tweaks to the TurboFan backends and the CodeStubAssembler, we should be able to rewrite it as TurboFanCodeStub in the near future. Drive-by-fix: Refactor and unify the CreateArgumentsType which was different in TurboFan and Ignition; now we have a single enum class which is used in both TurboFan and Ignition. R=jarin@chromium.org, rmcilroy@chromium.org TBR=rossberg@chromium.org BUG=v8:2159 LOG=n Review URL: https://codereview.chromium.org/1676883002 Cr-Commit-Position: refs/heads/master@{#33809}
2016-02-08 10:08:21 +00:00
.CreateArguments(CreateArgumentsType::kRestParameter);
// Emit constant loads.
builder.LoadLiteral(Smi::FromInt(0))
.StoreAccumulatorInRegister(reg)
.LoadLiteral(Smi::FromInt(8))
.CompareOperation(Token::Value::NE, reg,
1) // Prevent peephole optimization
// LdaSmi, Star -> LdrSmi.
.StoreAccumulatorInRegister(reg)
.LoadLiteral(Smi::FromInt(10000000))
.StoreAccumulatorInRegister(reg)
.LoadLiteral(factory->NewStringFromStaticChars("A constant"))
.StoreAccumulatorInRegister(reg)
.LoadUndefined()
.Debugger() // Prevent peephole optimization LdaNull, Star -> LdrNull.
.LoadNull()
.StoreAccumulatorInRegister(reg)
.LoadTheHole()
.StoreAccumulatorInRegister(reg)
.LoadTrue()
.StoreAccumulatorInRegister(reg)
.LoadFalse()
.StoreAccumulatorInRegister(wide);
// Emit Ldar and Star taking care to foil the register optimizer.
builder.StackCheck(0)
.LoadAccumulatorWithRegister(other)
.BinaryOperation(Token::ADD, reg, 1)
.StoreAccumulatorInRegister(reg)
.LoadNull();
// Emit register-register transfer.
builder.MoveRegister(reg, other);
builder.MoveRegister(reg, wide);
// Emit global load / store operations.
Handle<String> name = factory->NewStringFromStaticChars("var_name");
builder.LoadGlobal(1, TypeofMode::NOT_INSIDE_TYPEOF)
.LoadGlobal(1, TypeofMode::INSIDE_TYPEOF)
.StoreGlobal(name, 1, LanguageMode::SLOPPY)
.StoreGlobal(name, 1, LanguageMode::STRICT);
// Emit context operations.
builder.PushContext(reg)
.PopContext(reg)
.LoadContextSlot(reg, 1, 0)
.StoreContextSlot(reg, 1, 0);
// Emit load / store property operations.
builder.LoadNamedProperty(reg, name, 0)
.LoadKeyedProperty(reg, 0)
.StoreNamedProperty(reg, name, 0, LanguageMode::SLOPPY)
.StoreKeyedProperty(reg, reg, 0, LanguageMode::SLOPPY)
.StoreNamedProperty(reg, name, 0, LanguageMode::STRICT)
.StoreKeyedProperty(reg, reg, 0, LanguageMode::STRICT);
// Emit load / store lookup slots.
builder.LoadLookupSlot(name, TypeofMode::NOT_INSIDE_TYPEOF)
.LoadLookupSlot(name, TypeofMode::INSIDE_TYPEOF)
.StoreLookupSlot(name, LanguageMode::SLOPPY)
.StoreLookupSlot(name, LanguageMode::STRICT);
// Emit load / store lookup slots with context fast paths.
builder.LoadLookupContextSlot(name, TypeofMode::NOT_INSIDE_TYPEOF, 1, 0)
.LoadLookupContextSlot(name, TypeofMode::INSIDE_TYPEOF, 1, 0);
// Emit closure operations.
builder.CreateClosure(0, NOT_TENURED);
// Emit create context operation.
builder.CreateBlockContext(factory->NewScopeInfo(1));
builder.CreateCatchContext(reg, name, factory->NewScopeInfo(1));
builder.CreateFunctionContext(1);
builder.CreateWithContext(reg, factory->NewScopeInfo(1));
// Emit literal creation operations.
builder.CreateRegExpLiteral(factory->NewStringFromStaticChars("a"), 0, 0)
.CreateArrayLiteral(factory->NewFixedArray(1), 0, 0)
.CreateObjectLiteral(factory->NewFixedArray(1), 0, 0, reg);
// Call operations.
builder.Call(reg, other, 0, 1)
.Call(reg, wide, 0, 1)
.TailCall(reg, other, 0, 1)
.TailCall(reg, wide, 0, 1)
.CallRuntime(Runtime::kIsArray, reg, 1)
.CallRuntime(Runtime::kIsArray, wide, 1)
.CallRuntimeForPair(Runtime::kLoadLookupSlotForCall, reg, 1, other)
.CallRuntimeForPair(Runtime::kLoadLookupSlotForCall, wide, 1, other)
.CallJSRuntime(Context::SPREAD_ITERABLE_INDEX, reg, 1)
.CallJSRuntime(Context::SPREAD_ITERABLE_INDEX, wide, 1);
// Emit binary operator invocations.
builder.BinaryOperation(Token::Value::ADD, reg, 1)
.BinaryOperation(Token::Value::SUB, reg, 2)
.BinaryOperation(Token::Value::MUL, reg, 3)
.BinaryOperation(Token::Value::DIV, reg, 4)
.BinaryOperation(Token::Value::MOD, reg, 5);
// Emit bitwise operator invocations
builder.BinaryOperation(Token::Value::BIT_OR, reg, 6)
.BinaryOperation(Token::Value::BIT_XOR, reg, 7)
.BinaryOperation(Token::Value::BIT_AND, reg, 8);
// Emit shift operator invocations
builder.BinaryOperation(Token::Value::SHL, reg, 9)
.BinaryOperation(Token::Value::SAR, reg, 10)
.BinaryOperation(Token::Value::SHR, reg, 11);
// Emit peephole optimizations of LdaSmi followed by binary operation.
builder.LoadLiteral(Smi::FromInt(1))
.BinaryOperation(Token::Value::ADD, reg, 1)
.LoadLiteral(Smi::FromInt(2))
.BinaryOperation(Token::Value::SUB, reg, 2)
.LoadLiteral(Smi::FromInt(3))
.BinaryOperation(Token::Value::BIT_AND, reg, 3)
.LoadLiteral(Smi::FromInt(4))
.BinaryOperation(Token::Value::BIT_OR, reg, 4)
.LoadLiteral(Smi::FromInt(5))
.BinaryOperation(Token::Value::SHL, reg, 5)
.LoadLiteral(Smi::FromInt(6))
.BinaryOperation(Token::Value::SAR, reg, 6);
// Emit count operatior invocations
builder.CountOperation(Token::Value::ADD, 1)
.CountOperation(Token::Value::SUB, 1);
// Emit unary operator invocations.
builder
.LogicalNot() // ToBooleanLogicalNot
.LogicalNot() // non-ToBoolean LogicalNot
.TypeOf();
// Emit delete
builder.Delete(reg, LanguageMode::SLOPPY).Delete(reg, LanguageMode::STRICT);
// Emit new.
builder.New(reg, reg, 0, 1);
builder.New(wide, wide, 0, 1);
// Emit test operator invocations.
builder.CompareOperation(Token::Value::EQ, reg, 1)
.CompareOperation(Token::Value::NE, reg, 2)
.CompareOperation(Token::Value::EQ_STRICT, reg, 3)
.CompareOperation(Token::Value::LT, reg, 4)
.CompareOperation(Token::Value::GT, reg, 5)
.CompareOperation(Token::Value::LTE, reg, 6)
.CompareOperation(Token::Value::GTE, reg, 7)
.CompareOperation(Token::Value::INSTANCEOF, reg, 8)
.CompareOperation(Token::Value::IN, reg, 9);
// Emit conversion operator invocations.
builder.ConvertAccumulatorToNumber(reg)
.ConvertAccumulatorToObject(reg)
.ConvertAccumulatorToName(reg);
// Short jumps with Imm8 operands
{
BytecodeLabel start, after_jump1, after_jump2, after_jump3, after_jump4;
builder.Bind(&start)
.Jump(&after_jump1)
.Bind(&after_jump1)
.JumpIfNull(&after_jump2)
.Bind(&after_jump2)
.JumpIfUndefined(&after_jump3)
.Bind(&after_jump3)
.JumpIfNotHole(&after_jump4)
.Bind(&after_jump4)
.JumpLoop(&start, 0);
}
// Longer jumps with constant operands
BytecodeLabel end[8];
{
BytecodeLabel after_jump;
builder.Jump(&end[0])
.Bind(&after_jump)
.LoadTrue()
.JumpIfTrue(&end[1])
.LoadTrue()
.JumpIfFalse(&end[2])
.LoadLiteral(Smi::FromInt(0))
.JumpIfTrue(&end[3])
.LoadLiteral(Smi::FromInt(0))
.JumpIfFalse(&end[4])
.JumpIfNull(&end[5])
.JumpIfUndefined(&end[6])
.JumpIfNotHole(&end[7]);
}
// Perform an operation that returns boolean value to
// generate JumpIfTrue/False
{
BytecodeLabel after_jump1, after_jump2;
builder.CompareOperation(Token::Value::EQ, reg, 1)
.JumpIfTrue(&after_jump1)
.Bind(&after_jump1)
.CompareOperation(Token::Value::EQ, reg, 2)
.JumpIfFalse(&after_jump2)
.Bind(&after_jump2);
}
// Perform an operation that returns a non-boolean operation to
// generate JumpIfToBooleanTrue/False.
{
BytecodeLabel after_jump1, after_jump2;
builder.BinaryOperation(Token::Value::ADD, reg, 1)
.JumpIfTrue(&after_jump1)
.Bind(&after_jump1)
.BinaryOperation(Token::Value::ADD, reg, 2)
.JumpIfFalse(&after_jump2)
.Bind(&after_jump2);
}
// Emit stack check bytecode.
builder.StackCheck(0);
// Emit throw and re-throw in it's own basic block so that the rest of the
// code isn't omitted due to being dead.
BytecodeLabel after_throw;
builder.Throw().Bind(&after_throw);
BytecodeLabel after_rethrow;
builder.ReThrow().Bind(&after_rethrow);
builder.ForInPrepare(reg, reg)
.ForInContinue(reg, reg)
.ForInNext(reg, reg, reg, 1)
.ForInStep(reg);
builder.ForInPrepare(reg, wide)
.ForInContinue(reg, other)
.ForInNext(wide, wide, wide, 1024)
.ForInStep(reg);
// Wide constant pool loads
for (int i = 0; i < 256; i++) {
// Emit junk in constant pool to force wide constant pool index.
builder.LoadLiteral(factory->NewNumber(2.5321 + i));
}
builder.LoadLiteral(Smi::FromInt(20000000));
Handle<String> wide_name = factory->NewStringFromStaticChars("var_wide_name");
// Emit wide global load / store operations.
builder.LoadGlobal(1024, TypeofMode::NOT_INSIDE_TYPEOF)
.LoadGlobal(1024, TypeofMode::INSIDE_TYPEOF)
.LoadGlobal(1024, TypeofMode::INSIDE_TYPEOF)
.StoreGlobal(name, 1024, LanguageMode::SLOPPY)
.StoreGlobal(wide_name, 1, LanguageMode::STRICT);
// Emit extra wide global load.
builder.LoadGlobal(1024 * 1024, TypeofMode::NOT_INSIDE_TYPEOF);
// Emit wide load / store property operations.
builder.LoadNamedProperty(reg, wide_name, 0)
.LoadKeyedProperty(reg, 2056)
.StoreNamedProperty(reg, wide_name, 0, LanguageMode::SLOPPY)
.StoreKeyedProperty(reg, reg, 2056, LanguageMode::SLOPPY)
.StoreNamedProperty(reg, wide_name, 0, LanguageMode::STRICT)
.StoreKeyedProperty(reg, reg, 2056, LanguageMode::STRICT);
// Emit wide context operations.
builder.LoadContextSlot(reg, 1024, 0).StoreContextSlot(reg, 1024, 0);
// Emit wide load / store lookup slots.
builder.LoadLookupSlot(wide_name, TypeofMode::NOT_INSIDE_TYPEOF)
.LoadLookupSlot(wide_name, TypeofMode::INSIDE_TYPEOF)
.StoreLookupSlot(wide_name, LanguageMode::SLOPPY)
.StoreLookupSlot(wide_name, LanguageMode::STRICT);
// Emit loads which will be transformed to Ldr equivalents by the peephole
// optimizer.
builder.LoadNamedProperty(reg, name, 0)
.StoreAccumulatorInRegister(reg)
.LoadKeyedProperty(reg, 0)
.StoreAccumulatorInRegister(reg)
.LoadContextSlot(reg, 1, 0)
.StoreAccumulatorInRegister(reg)
.LoadGlobal(0, TypeofMode::NOT_INSIDE_TYPEOF)
.StoreAccumulatorInRegister(reg)
.LoadUndefined()
.StoreAccumulatorInRegister(reg);
// CreateClosureWide
builder.CreateClosure(1000, NOT_TENURED);
// Emit wide variant of literal creation operations.
builder.CreateRegExpLiteral(factory->NewStringFromStaticChars("wide_literal"),
0, 0)
.CreateArrayLiteral(factory->NewFixedArray(2), 0, 0)
.CreateObjectLiteral(factory->NewFixedArray(2), 0, 0, reg);
// Emit generator operations
builder.SuspendGenerator(reg)
.ResumeGenerator(reg);
// Intrinsics handled by the interpreter.
builder.CallRuntime(Runtime::kInlineIsArray, reg, 1)
.CallRuntime(Runtime::kInlineIsArray, wide, 1);
// Emit debugger bytecode.
builder.Debugger();
// Insert dummy ops to force longer jumps.
for (int i = 0; i < 128; i++) {
builder.LoadTrue();
}
// Bind labels for long jumps at the very end.
for (size_t i = 0; i < arraysize(end); i++) {
builder.Bind(&end[i]);
}
// Return must be the last instruction.
builder.Return();
// Generate BytecodeArray.
Handle<BytecodeArray> the_array = builder.ToBytecodeArray(isolate());
CHECK_EQ(the_array->frame_size(),
builder.fixed_and_temporary_register_count() * kPointerSize);
// Build scorecard of bytecodes encountered in the BytecodeArray.
std::vector<int> scorecard(Bytecodes::ToByte(Bytecode::kLast) + 1);
Bytecode final_bytecode = Bytecode::kLdaZero;
int i = 0;
while (i < the_array->length()) {
uint8_t code = the_array->get(i);
scorecard[code] += 1;
final_bytecode = Bytecodes::FromByte(code);
OperandScale operand_scale = OperandScale::kSingle;
int prefix_offset = 0;
if (Bytecodes::IsPrefixScalingBytecode(final_bytecode)) {
operand_scale = Bytecodes::PrefixBytecodeToOperandScale(final_bytecode);
prefix_offset = 1;
code = the_array->get(i + 1);
final_bytecode = Bytecodes::FromByte(code);
}
i += prefix_offset + Bytecodes::Size(final_bytecode, operand_scale);
}
// Insert entry for illegal bytecode as this is never willingly emitted.
scorecard[Bytecodes::ToByte(Bytecode::kIllegal)] = 1;
// Insert entry for nop bytecode as this often gets optimized out.
scorecard[Bytecodes::ToByte(Bytecode::kNop)] = 1;
if (!FLAG_ignition_peephole) {
// Insert entries for bytecodes only emitted by peephole optimizer.
scorecard[Bytecodes::ToByte(Bytecode::kLdrNamedProperty)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kLdrKeyedProperty)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kLdrGlobal)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kLdrContextSlot)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kLdrUndefined)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kLogicalNot)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kJump)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kJumpIfTrue)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kJumpIfFalse)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kJumpIfTrueConstant)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kJumpIfFalseConstant)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kAddSmi)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kSubSmi)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kBitwiseAndSmi)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kBitwiseOrSmi)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kShiftLeftSmi)] = 1;
scorecard[Bytecodes::ToByte(Bytecode::kShiftRightSmi)] = 1;
}
// Check return occurs at the end and only once in the BytecodeArray.
CHECK_EQ(final_bytecode, Bytecode::kReturn);
CHECK_EQ(scorecard[Bytecodes::ToByte(final_bytecode)], 1);
#define CHECK_BYTECODE_PRESENT(Name, ...) \
/* Check Bytecode is marked in scorecard, unless it's a debug break */ \
if (!Bytecodes::IsDebugBreak(Bytecode::k##Name)) { \
CHECK_GE(scorecard[Bytecodes::ToByte(Bytecode::k##Name)], 1); \
}
BYTECODE_LIST(CHECK_BYTECODE_PRESENT)
#undef CHECK_BYTECODE_PRESENT
}
TEST_F(BytecodeArrayBuilderTest, FrameSizesLookGood) {
CanonicalHandleScope canonical(isolate());
for (int locals = 0; locals < 5; locals++) {
for (int contexts = 0; contexts < 4; contexts++) {
for (int temps = 0; temps < 3; temps++) {
BytecodeArrayBuilder builder(isolate(), zone(), 0, contexts, locals);
BytecodeRegisterAllocator temporaries(
zone(), builder.temporary_register_allocator());
for (int i = 0; i < locals + contexts; i++) {
builder.LoadLiteral(Smi::FromInt(0));
builder.StoreAccumulatorInRegister(Register(i));
}
for (int i = 0; i < temps; i++) {
builder.LoadLiteral(Smi::FromInt(0));
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), 0);
}
builder.Return();
Handle<BytecodeArray> the_array = builder.ToBytecodeArray(isolate());
int total_registers = locals + contexts + temps;
CHECK_EQ(the_array->frame_size(), total_registers * kPointerSize);
}
}
}
}
TEST_F(BytecodeArrayBuilderTest, RegisterValues) {
CanonicalHandleScope canonical(isolate());
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) {
CanonicalHandleScope canonical(isolate());
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) {
CanonicalHandleScope canonical(isolate());
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) {
CanonicalHandleScope canonical(isolate());
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(isolate());
// 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) {
CanonicalHandleScope canonical(isolate());
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, 1)
.JumpIfTrue(&near1)
.CompareOperation(Token::Value::EQ, reg, 2)
.JumpIfFalse(&near2)
.BinaryOperation(Token::Value::ADD, reg, 1)
.JumpIfTrue(&near3)
.BinaryOperation(Token::Value::ADD, reg, 2)
.JumpIfFalse(&near4)
.Bind(&near0)
.Bind(&near1)
.Bind(&near2)
.Bind(&near3)
.Bind(&near4)
.Jump(&far0)
.Bind(&after_jump1)
.CompareOperation(Token::Value::EQ, reg, 3)
.JumpIfTrue(&far1)
.CompareOperation(Token::Value::EQ, reg, 4)
.JumpIfFalse(&far2)
.BinaryOperation(Token::Value::ADD, reg, 3)
.JumpIfTrue(&far3)
.BinaryOperation(Token::Value::ADD, reg, 4)
.JumpIfFalse(&far4);
for (int i = 0; i < kFarJumpDistance - 22; i++) {
builder.Debugger();
}
builder.Bind(&far0).Bind(&far1).Bind(&far2).Bind(&far3).Bind(&far4);
builder.Return();
Handle<BytecodeArray> array = builder.ToBytecodeArray(isolate());
DCHECK_EQ(array->length(), 44 + kFarJumpDistance - 22 + 1);
BytecodeArrayIterator iterator(array);
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
CHECK_EQ(iterator.GetImmediateOperand(0), 22);
iterator.Advance();
// Ignore compare operation.
iterator.Advance();
CHECK_EQ(iterator.current_bytecode(),
PeepholeToBoolean(Bytecode::kJumpIfToBooleanTrue));
CHECK_EQ(iterator.GetImmediateOperand(0), 17);
iterator.Advance();
// Ignore compare operation.
iterator.Advance();
CHECK_EQ(iterator.current_bytecode(),
PeepholeToBoolean(Bytecode::kJumpIfToBooleanFalse));
CHECK_EQ(iterator.GetImmediateOperand(0), 12);
iterator.Advance();
// Ignore add operation.
iterator.Advance();
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfToBooleanTrue);
CHECK_EQ(iterator.GetImmediateOperand(0), 7);
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 - 5));
iterator.Advance();
// Ignore compare operation.
iterator.Advance();
CHECK_EQ(iterator.current_bytecode(),
PeepholeToBoolean(Bytecode::kJumpIfToBooleanFalseConstant));
CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
Smi::FromInt(kFarJumpDistance - 10));
iterator.Advance();
// Ignore add operation.
iterator.Advance();
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpIfToBooleanTrueConstant);
CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
Smi::FromInt(kFarJumpDistance - 15));
iterator.Advance();
// Ignore add operation.
iterator.Advance();
CHECK_EQ(iterator.current_bytecode(),
Bytecode::kJumpIfToBooleanFalseConstant);
CHECK_EQ(*iterator.GetConstantForIndexOperand(0),
Smi::FromInt(kFarJumpDistance - 20));
iterator.Advance();
}
TEST_F(BytecodeArrayBuilderTest, BackwardJumps) {
CanonicalHandleScope canonical(isolate());
BytecodeArrayBuilder builder(isolate(), zone(), 0, 0, 1);
Register reg(0);
BytecodeLabel label0;
builder.Bind(&label0).JumpLoop(&label0, 0);
for (int i = 0; i < 42; i++) {
BytecodeLabel after_jump;
builder.JumpLoop(&label0, 0).Bind(&after_jump);
}
// Add padding to force wide backwards jumps.
for (int i = 0; i < 256; i++) {
builder.Debugger();
}
builder.JumpLoop(&label0, 0);
BytecodeLabel end;
builder.Bind(&end);
builder.Return();
Handle<BytecodeArray> array = builder.ToBytecodeArray(isolate());
BytecodeArrayIterator iterator(array);
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpLoop);
CHECK_EQ(iterator.GetImmediateOperand(0), 0);
iterator.Advance();
for (int i = 0; i < 42; i++) {
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpLoop);
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kSingle);
// offset of 3 (because kJumpLoop takes two immediate operands)
CHECK_EQ(iterator.GetImmediateOperand(0), -i * 3 - 3);
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();
}
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpLoop);
CHECK_EQ(iterator.current_operand_scale(), OperandScale::kDouble);
CHECK_EQ(iterator.GetImmediateOperand(0), -386);
iterator.Advance();
CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
iterator.Advance();
CHECK(iterator.done());
}
TEST_F(BytecodeArrayBuilderTest, LabelReuse) {
CanonicalHandleScope canonical(isolate());
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)
.JumpLoop(&label, 0)
.Bind(&after_jump0)
.JumpLoop(&label, 0)
.Bind(&after_jump1)
.Return();
Handle<BytecodeArray> array = builder.ToBytecodeArray(isolate());
BytecodeArrayIterator iterator(array);
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJump);
CHECK_EQ(iterator.GetImmediateOperand(0), 2);
iterator.Advance();
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpLoop);
CHECK_EQ(iterator.GetImmediateOperand(0), 0);
iterator.Advance();
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpLoop);
CHECK_EQ(iterator.GetImmediateOperand(0), -3);
iterator.Advance();
CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
iterator.Advance();
CHECK(iterator.done());
}
TEST_F(BytecodeArrayBuilderTest, LabelAddressReuse) {
CanonicalHandleScope canonical(isolate());
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)
.JumpLoop(&label, 0)
.Bind(&after_jump0)
.JumpLoop(&label, 0)
.Bind(&after_jump1);
}
builder.Return();
Handle<BytecodeArray> array = builder.ToBytecodeArray(isolate());
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::kJumpLoop);
CHECK_EQ(iterator.GetImmediateOperand(0), 0);
iterator.Advance();
CHECK_EQ(iterator.current_bytecode(), Bytecode::kJumpLoop);
CHECK_EQ(iterator.GetImmediateOperand(0), -3);
iterator.Advance();
}
CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
iterator.Advance();
CHECK(iterator.done());
}
} // namespace interpreter
} // namespace internal
} // namespace v8