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DEFINITIONS
This source file includes following definitions.
- LITHIUM_CONCRETE_INSTRUCTION_LIST
- MarkSpilledRegister
- MarkSpilledDoubleRegister
- VerifyCall
- PrintTo
- PrintDataTo
- PrintOutputOperandTo
- PrintDataTo
- IsRedundant
- PrintDataTo
- Mnemonic
- Mnemonic
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- GetNextSpillIndex
- GetNextSpillSlot
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- PrintDataTo
- Abort
- ToUnallocated
- ToUnallocated
- UseFixed
- UseFixedDouble
- UseRegister
- UseRegisterAtStart
- UseTempRegister
- Use
- UseAtStart
- UseOrConstant
- UseOrConstantAtStart
- UseRegisterOrConstant
- UseRegisterOrConstantAtStart
- UseAny
- Use
- Define
- DefineAsRegister
- DefineAsSpilled
- DefineSameAsFirst
- DefineFixed
- DefineFixedDouble
- AssignEnvironment
- MarkAsCall
- AssignPointerMap
- TempRegister
- FixedTemp
- FixedTemp
- DoBlockEntry
- DoSoftDeoptimize
- DoDeoptimize
- DoShift
- DoArithmeticD
- DoArithmeticT
- DoBasicBlock
- VisitInstruction
- CreateEnvironment
- DoGoto
- DoBranch
- DoCompareMap
- DoArgumentsLength
- DoArgumentsElements
- DoInstanceOf
- DoInstanceOfKnownGlobal
- DoWrapReceiver
- DoApplyArguments
- DoPushArgument
- DoThisFunction
- DoContext
- DoOuterContext
- DoDeclareGlobals
- DoGlobalObject
- DoGlobalReceiver
- DoCallConstantFunction
- DoInvokeFunction
- DoUnaryMathOperation
- DoCallKeyed
- DoCallNamed
- DoCallGlobal
- DoCallKnownGlobal
- DoCallNew
- DoCallFunction
- DoCallRuntime
- DoShr
- DoSar
- DoShl
- DoBitwise
- DoBitNot
- DoDiv
- SimplifiedDividendForMathFloorOfDiv
- SimplifiedDivisorForMathFloorOfDiv
- DoMathFloorOfDiv
- DoMod
- DoMul
- DoSub
- DoAdd
- DoPower
- DoRandom
- DoCompareGeneric
- DoCompareIDAndBranch
- DoCompareObjectEqAndBranch
- DoCompareConstantEqAndBranch
- DoIsNilAndBranch
- DoIsObjectAndBranch
- DoIsStringAndBranch
- DoIsSmiAndBranch
- DoIsUndetectableAndBranch
- DoStringCompareAndBranch
- DoHasInstanceTypeAndBranch
- DoGetCachedArrayIndex
- DoHasCachedArrayIndexAndBranch
- DoClassOfTestAndBranch
- DoJSArrayLength
- DoFixedArrayBaseLength
- DoElementsKind
- DoValueOf
- DoDateField
- DoBoundsCheck
- DoAbnormalExit
- DoThrow
- DoUseConst
- DoForceRepresentation
- DoChange
- DoCheckNonSmi
- DoCheckInstanceType
- DoCheckPrototypeMaps
- DoCheckSmi
- DoCheckFunction
- DoCheckMaps
- DoClampToUint8
- DoReturn
- DoConstant
- DoLoadGlobalCell
- DoLoadGlobalGeneric
- DoStoreGlobalCell
- DoStoreGlobalGeneric
- DoLoadContextSlot
- DoStoreContextSlot
- DoLoadNamedField
- DoLoadNamedFieldPolymorphic
- DoLoadNamedGeneric
- DoLoadFunctionPrototype
- DoLoadElements
- DoLoadExternalArrayPointer
- DoLoadKeyedFastElement
- DoLoadKeyedFastDoubleElement
- DoLoadKeyedSpecializedArrayElement
- DoLoadKeyedGeneric
- DoStoreKeyedFastElement
- DoStoreKeyedFastDoubleElement
- DoStoreKeyedSpecializedArrayElement
- DoStoreKeyedGeneric
- DoTransitionElementsKind
- DoStoreNamedField
- DoStoreNamedGeneric
- DoStringAdd
- DoStringCharCodeAt
- DoStringCharFromCode
- DoStringLength
- DoAllocateObject
- DoFastLiteral
- DoArrayLiteral
- DoObjectLiteral
- DoRegExpLiteral
- DoFunctionLiteral
- DoDeleteProperty
- DoOsrEntry
- DoParameter
- DoUnknownOSRValue
- DoCallStub
- DoArgumentsObject
- DoAccessArgumentsAt
- DoToFastProperties
- DoTypeof
- DoTypeofIsAndBranch
- DoIsConstructCallAndBranch
- DoSimulate
- DoStackCheck
- DoEnterInlined
- DoLeaveInlined
- DoIn
- DoForInPrepareMap
- DoForInCacheArray
- DoCheckMapValue
- DoLoadFieldByIndex
// Copyright 2012 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "v8.h"
#if defined(V8_TARGET_ARCH_IA32)
#include "lithium-allocator-inl.h"
#include "ia32/lithium-ia32.h"
#include "ia32/lithium-codegen-ia32.h"
namespace v8 {
namespace internal {
#define DEFINE_COMPILE(type) \
void L##type::CompileToNative(LCodeGen* generator) { \
generator->Do##type(this); \
}
LITHIUM_CONCRETE_INSTRUCTION_LIST(DEFINE_COMPILE)
#undef DEFINE_COMPILE
LOsrEntry::LOsrEntry() {
for (int i = 0; i < Register::kNumAllocatableRegisters; ++i) {
register_spills_[i] = NULL;
}
for (int i = 0; i < DoubleRegister::kNumAllocatableRegisters; ++i) {
double_register_spills_[i] = NULL;
}
}
void LOsrEntry::MarkSpilledRegister(int allocation_index,
LOperand* spill_operand) {
ASSERT(spill_operand->IsStackSlot());
ASSERT(register_spills_[allocation_index] == NULL);
register_spills_[allocation_index] = spill_operand;
}
void LOsrEntry::MarkSpilledDoubleRegister(int allocation_index,
LOperand* spill_operand) {
ASSERT(spill_operand->IsDoubleStackSlot());
ASSERT(double_register_spills_[allocation_index] == NULL);
double_register_spills_[allocation_index] = spill_operand;
}
#ifdef DEBUG
void LInstruction::VerifyCall() {
// Call instructions can use only fixed registers as temporaries and
// outputs because all registers are blocked by the calling convention.
// Inputs operands must use a fixed register or use-at-start policy or
// a non-register policy.
ASSERT(Output() == NULL ||
LUnallocated::cast(Output())->HasFixedPolicy() ||
!LUnallocated::cast(Output())->HasRegisterPolicy());
for (UseIterator it(this); !it.Done(); it.Advance()) {
LUnallocated* operand = LUnallocated::cast(it.Current());
ASSERT(operand->HasFixedPolicy() ||
operand->IsUsedAtStart());
}
for (TempIterator it(this); !it.Done(); it.Advance()) {
LUnallocated* operand = LUnallocated::cast(it.Current());
ASSERT(operand->HasFixedPolicy() ||!operand->HasRegisterPolicy());
}
}
#endif
void LInstruction::PrintTo(StringStream* stream) {
stream->Add("%s ", this->Mnemonic());
PrintOutputOperandTo(stream);
PrintDataTo(stream);
if (HasEnvironment()) {
stream->Add(" ");
environment()->PrintTo(stream);
}
if (HasPointerMap()) {
stream->Add(" ");
pointer_map()->PrintTo(stream);
}
}
void LInstruction::PrintDataTo(StringStream* stream) {
stream->Add("= ");
for (int i = 0; i < InputCount(); i++) {
if (i > 0) stream->Add(" ");
InputAt(i)->PrintTo(stream);
}
}
void LInstruction::PrintOutputOperandTo(StringStream* stream) {
if (HasResult()) result()->PrintTo(stream);
}
void LLabel::PrintDataTo(StringStream* stream) {
LGap::PrintDataTo(stream);
LLabel* rep = replacement();
if (rep != NULL) {
stream->Add(" Dead block replaced with B%d", rep->block_id());
}
}
bool LGap::IsRedundant() const {
for (int i = 0; i < 4; i++) {
if (parallel_moves_[i] != NULL && !parallel_moves_[i]->IsRedundant()) {
return false;
}
}
return true;
}
void LGap::PrintDataTo(StringStream* stream) {
for (int i = 0; i < 4; i++) {
stream->Add("(");
if (parallel_moves_[i] != NULL) {
parallel_moves_[i]->PrintDataTo(stream);
}
stream->Add(") ");
}
}
const char* LArithmeticD::Mnemonic() const {
switch (op()) {
case Token::ADD: return "add-d";
case Token::SUB: return "sub-d";
case Token::MUL: return "mul-d";
case Token::DIV: return "div-d";
case Token::MOD: return "mod-d";
default:
UNREACHABLE();
return NULL;
}
}
const char* LArithmeticT::Mnemonic() const {
switch (op()) {
case Token::ADD: return "add-t";
case Token::SUB: return "sub-t";
case Token::MUL: return "mul-t";
case Token::MOD: return "mod-t";
case Token::DIV: return "div-t";
case Token::BIT_AND: return "bit-and-t";
case Token::BIT_OR: return "bit-or-t";
case Token::BIT_XOR: return "bit-xor-t";
case Token::SHL: return "sal-t";
case Token::SAR: return "sar-t";
case Token::SHR: return "shr-t";
default:
UNREACHABLE();
return NULL;
}
}
void LGoto::PrintDataTo(StringStream* stream) {
stream->Add("B%d", block_id());
}
void LBranch::PrintDataTo(StringStream* stream) {
stream->Add("B%d | B%d on ", true_block_id(), false_block_id());
InputAt(0)->PrintTo(stream);
}
void LCmpIDAndBranch::PrintDataTo(StringStream* stream) {
stream->Add("if ");
InputAt(0)->PrintTo(stream);
stream->Add(" %s ", Token::String(op()));
InputAt(1)->PrintTo(stream);
stream->Add(" then B%d else B%d", true_block_id(), false_block_id());
}
void LIsNilAndBranch::PrintDataTo(StringStream* stream) {
stream->Add("if ");
InputAt(0)->PrintTo(stream);
stream->Add(kind() == kStrictEquality ? " === " : " == ");
stream->Add(nil() == kNullValue ? "null" : "undefined");
stream->Add(" then B%d else B%d", true_block_id(), false_block_id());
}
void LIsObjectAndBranch::PrintDataTo(StringStream* stream) {
stream->Add("if is_object(");
InputAt(0)->PrintTo(stream);
stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
}
void LIsStringAndBranch::PrintDataTo(StringStream* stream) {
stream->Add("if is_string(");
InputAt(0)->PrintTo(stream);
stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
}
void LIsSmiAndBranch::PrintDataTo(StringStream* stream) {
stream->Add("if is_smi(");
InputAt(0)->PrintTo(stream);
stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
}
void LIsUndetectableAndBranch::PrintDataTo(StringStream* stream) {
stream->Add("if is_undetectable(");
InputAt(0)->PrintTo(stream);
stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
}
void LStringCompareAndBranch::PrintDataTo(StringStream* stream) {
stream->Add("if string_compare(");
InputAt(1)->PrintTo(stream);
InputAt(2)->PrintTo(stream);
stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
}
void LHasInstanceTypeAndBranch::PrintDataTo(StringStream* stream) {
stream->Add("if has_instance_type(");
InputAt(0)->PrintTo(stream);
stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
}
void LHasCachedArrayIndexAndBranch::PrintDataTo(StringStream* stream) {
stream->Add("if has_cached_array_index(");
InputAt(0)->PrintTo(stream);
stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
}
void LClassOfTestAndBranch::PrintDataTo(StringStream* stream) {
stream->Add("if class_of_test(");
InputAt(0)->PrintTo(stream);
stream->Add(", \"%o\") then B%d else B%d",
*hydrogen()->class_name(),
true_block_id(),
false_block_id());
}
void LTypeofIsAndBranch::PrintDataTo(StringStream* stream) {
stream->Add("if typeof ");
InputAt(0)->PrintTo(stream);
stream->Add(" == \"%s\" then B%d else B%d",
*hydrogen()->type_literal()->ToCString(),
true_block_id(), false_block_id());
}
void LCallConstantFunction::PrintDataTo(StringStream* stream) {
stream->Add("#%d / ", arity());
}
void LUnaryMathOperation::PrintDataTo(StringStream* stream) {
stream->Add("/%s ", hydrogen()->OpName());
InputAt(0)->PrintTo(stream);
}
void LMathPowHalf::PrintDataTo(StringStream* stream) {
stream->Add("/pow_half ");
InputAt(0)->PrintTo(stream);
}
void LLoadContextSlot::PrintDataTo(StringStream* stream) {
InputAt(0)->PrintTo(stream);
stream->Add("[%d]", slot_index());
}
void LStoreContextSlot::PrintDataTo(StringStream* stream) {
InputAt(0)->PrintTo(stream);
stream->Add("[%d] <- ", slot_index());
InputAt(1)->PrintTo(stream);
}
void LInvokeFunction::PrintDataTo(StringStream* stream) {
stream->Add("= ");
InputAt(0)->PrintTo(stream);
stream->Add(" ");
InputAt(1)->PrintTo(stream);
stream->Add(" #%d / ", arity());
}
void LCallKeyed::PrintDataTo(StringStream* stream) {
stream->Add("[ecx] #%d / ", arity());
}
void LCallNamed::PrintDataTo(StringStream* stream) {
SmartArrayPointer<char> name_string = name()->ToCString();
stream->Add("%s #%d / ", *name_string, arity());
}
void LCallGlobal::PrintDataTo(StringStream* stream) {
SmartArrayPointer<char> name_string = name()->ToCString();
stream->Add("%s #%d / ", *name_string, arity());
}
void LCallKnownGlobal::PrintDataTo(StringStream* stream) {
stream->Add("#%d / ", arity());
}
void LCallNew::PrintDataTo(StringStream* stream) {
stream->Add("= ");
InputAt(0)->PrintTo(stream);
stream->Add(" #%d / ", arity());
}
void LAccessArgumentsAt::PrintDataTo(StringStream* stream) {
arguments()->PrintTo(stream);
stream->Add(" length ");
length()->PrintTo(stream);
stream->Add(" index ");
index()->PrintTo(stream);
}
int LPlatformChunk::GetNextSpillIndex(bool is_double) {
// Skip a slot if for a double-width slot.
if (is_double) {
spill_slot_count_++;
spill_slot_count_ |= 1;
num_double_slots_++;
}
return spill_slot_count_++;
}
LOperand* LPlatformChunk::GetNextSpillSlot(bool is_double) {
int index = GetNextSpillIndex(is_double);
if (is_double) {
return LDoubleStackSlot::Create(index, zone());
} else {
return LStackSlot::Create(index, zone());
}
}
void LStoreNamedField::PrintDataTo(StringStream* stream) {
object()->PrintTo(stream);
stream->Add(".");
stream->Add(*String::cast(*name())->ToCString());
stream->Add(" <- ");
value()->PrintTo(stream);
}
void LStoreNamedGeneric::PrintDataTo(StringStream* stream) {
object()->PrintTo(stream);
stream->Add(".");
stream->Add(*String::cast(*name())->ToCString());
stream->Add(" <- ");
value()->PrintTo(stream);
}
void LStoreKeyedFastElement::PrintDataTo(StringStream* stream) {
object()->PrintTo(stream);
stream->Add("[");
key()->PrintTo(stream);
stream->Add("] <- ");
value()->PrintTo(stream);
}
void LStoreKeyedFastDoubleElement::PrintDataTo(StringStream* stream) {
elements()->PrintTo(stream);
stream->Add("[");
key()->PrintTo(stream);
stream->Add("] <- ");
value()->PrintTo(stream);
}
void LStoreKeyedGeneric::PrintDataTo(StringStream* stream) {
object()->PrintTo(stream);
stream->Add("[");
key()->PrintTo(stream);
stream->Add("] <- ");
value()->PrintTo(stream);
}
void LTransitionElementsKind::PrintDataTo(StringStream* stream) {
object()->PrintTo(stream);
stream->Add(" %p -> %p", *original_map(), *transitioned_map());
}
LPlatformChunk* LChunkBuilder::Build() {
ASSERT(is_unused());
chunk_ = new(zone()) LPlatformChunk(info(), graph());
HPhase phase("L_Building chunk", chunk_);
status_ = BUILDING;
// Reserve the first spill slot for the state of dynamic alignment.
int alignment_state_index = chunk_->GetNextSpillIndex(false);
ASSERT_EQ(alignment_state_index, 0);
USE(alignment_state_index);
const ZoneList<HBasicBlock*>* blocks = graph()->blocks();
for (int i = 0; i < blocks->length(); i++) {
HBasicBlock* next = NULL;
if (i < blocks->length() - 1) next = blocks->at(i + 1);
DoBasicBlock(blocks->at(i), next);
if (is_aborted()) return NULL;
}
status_ = DONE;
return chunk_;
}
void LChunkBuilder::Abort(const char* format, ...) {
if (FLAG_trace_bailout) {
SmartArrayPointer<char> name(
info()->shared_info()->DebugName()->ToCString());
PrintF("Aborting LPlatformChunk building in @\"%s\": ", *name);
va_list arguments;
va_start(arguments, format);
OS::VPrint(format, arguments);
va_end(arguments);
PrintF("\n");
}
status_ = ABORTED;
}
LUnallocated* LChunkBuilder::ToUnallocated(Register reg) {
return new(zone()) LUnallocated(LUnallocated::FIXED_REGISTER,
Register::ToAllocationIndex(reg));
}
LUnallocated* LChunkBuilder::ToUnallocated(XMMRegister reg) {
return new(zone()) LUnallocated(LUnallocated::FIXED_DOUBLE_REGISTER,
XMMRegister::ToAllocationIndex(reg));
}
LOperand* LChunkBuilder::UseFixed(HValue* value, Register fixed_register) {
return Use(value, ToUnallocated(fixed_register));
}
LOperand* LChunkBuilder::UseFixedDouble(HValue* value, XMMRegister reg) {
return Use(value, ToUnallocated(reg));
}
LOperand* LChunkBuilder::UseRegister(HValue* value) {
return Use(value, new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER));
}
LOperand* LChunkBuilder::UseRegisterAtStart(HValue* value) {
return Use(value,
new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER,
LUnallocated::USED_AT_START));
}
LOperand* LChunkBuilder::UseTempRegister(HValue* value) {
return Use(value, new(zone()) LUnallocated(LUnallocated::WRITABLE_REGISTER));
}
LOperand* LChunkBuilder::Use(HValue* value) {
return Use(value, new(zone()) LUnallocated(LUnallocated::NONE));
}
LOperand* LChunkBuilder::UseAtStart(HValue* value) {
return Use(value, new(zone()) LUnallocated(LUnallocated::NONE,
LUnallocated::USED_AT_START));
}
LOperand* LChunkBuilder::UseOrConstant(HValue* value) {
return value->IsConstant()
? chunk_->DefineConstantOperand(HConstant::cast(value))
: Use(value);
}
LOperand* LChunkBuilder::UseOrConstantAtStart(HValue* value) {
return value->IsConstant()
? chunk_->DefineConstantOperand(HConstant::cast(value))
: UseAtStart(value);
}
LOperand* LChunkBuilder::UseRegisterOrConstant(HValue* value) {
return value->IsConstant()
? chunk_->DefineConstantOperand(HConstant::cast(value))
: UseRegister(value);
}
LOperand* LChunkBuilder::UseRegisterOrConstantAtStart(HValue* value) {
return value->IsConstant()
? chunk_->DefineConstantOperand(HConstant::cast(value))
: UseRegisterAtStart(value);
}
LOperand* LChunkBuilder::UseAny(HValue* value) {
return value->IsConstant()
? chunk_->DefineConstantOperand(HConstant::cast(value))
: Use(value, new(zone()) LUnallocated(LUnallocated::ANY));
}
LOperand* LChunkBuilder::Use(HValue* value, LUnallocated* operand) {
if (value->EmitAtUses()) {
HInstruction* instr = HInstruction::cast(value);
VisitInstruction(instr);
}
operand->set_virtual_register(value->id());
return operand;
}
template<int I, int T>
LInstruction* LChunkBuilder::Define(LTemplateInstruction<1, I, T>* instr,
LUnallocated* result) {
result->set_virtual_register(current_instruction_->id());
instr->set_result(result);
return instr;
}
template<int I, int T>
LInstruction* LChunkBuilder::DefineAsRegister(
LTemplateInstruction<1, I, T>* instr) {
return Define(instr,
new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER));
}
template<int I, int T>
LInstruction* LChunkBuilder::DefineAsSpilled(
LTemplateInstruction<1, I, T>* instr,
int index) {
return Define(instr,
new(zone()) LUnallocated(LUnallocated::FIXED_SLOT, index));
}
template<int I, int T>
LInstruction* LChunkBuilder::DefineSameAsFirst(
LTemplateInstruction<1, I, T>* instr) {
return Define(instr,
new(zone()) LUnallocated(LUnallocated::SAME_AS_FIRST_INPUT));
}
template<int I, int T>
LInstruction* LChunkBuilder::DefineFixed(LTemplateInstruction<1, I, T>* instr,
Register reg) {
return Define(instr, ToUnallocated(reg));
}
template<int I, int T>
LInstruction* LChunkBuilder::DefineFixedDouble(
LTemplateInstruction<1, I, T>* instr,
XMMRegister reg) {
return Define(instr, ToUnallocated(reg));
}
LInstruction* LChunkBuilder::AssignEnvironment(LInstruction* instr) {
HEnvironment* hydrogen_env = current_block_->last_environment();
int argument_index_accumulator = 0;
instr->set_environment(CreateEnvironment(hydrogen_env,
&argument_index_accumulator));
return instr;
}
LInstruction* LChunkBuilder::MarkAsCall(LInstruction* instr,
HInstruction* hinstr,
CanDeoptimize can_deoptimize) {
#ifdef DEBUG
instr->VerifyCall();
#endif
instr->MarkAsCall();
instr = AssignPointerMap(instr);
if (hinstr->HasObservableSideEffects()) {
ASSERT(hinstr->next()->IsSimulate());
HSimulate* sim = HSimulate::cast(hinstr->next());
ASSERT(instruction_pending_deoptimization_environment_ == NULL);
ASSERT(pending_deoptimization_ast_id_ == AstNode::kNoNumber);
instruction_pending_deoptimization_environment_ = instr;
pending_deoptimization_ast_id_ = sim->ast_id();
}
// If instruction does not have side-effects lazy deoptimization
// after the call will try to deoptimize to the point before the call.
// Thus we still need to attach environment to this call even if
// call sequence can not deoptimize eagerly.
bool needs_environment =
(can_deoptimize == CAN_DEOPTIMIZE_EAGERLY) ||
!hinstr->HasObservableSideEffects();
if (needs_environment && !instr->HasEnvironment()) {
instr = AssignEnvironment(instr);
}
return instr;
}
LInstruction* LChunkBuilder::AssignPointerMap(LInstruction* instr) {
ASSERT(!instr->HasPointerMap());
instr->set_pointer_map(new(zone()) LPointerMap(position_, zone()));
return instr;
}
LUnallocated* LChunkBuilder::TempRegister() {
LUnallocated* operand =
new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER);
operand->set_virtual_register(allocator_->GetVirtualRegister());
if (!allocator_->AllocationOk()) {
Abort("Not enough virtual registers (temps).");
}
return operand;
}
LOperand* LChunkBuilder::FixedTemp(Register reg) {
LUnallocated* operand = ToUnallocated(reg);
ASSERT(operand->HasFixedPolicy());
return operand;
}
LOperand* LChunkBuilder::FixedTemp(XMMRegister reg) {
LUnallocated* operand = ToUnallocated(reg);
ASSERT(operand->HasFixedPolicy());
return operand;
}
LInstruction* LChunkBuilder::DoBlockEntry(HBlockEntry* instr) {
return new(zone()) LLabel(instr->block());
}
LInstruction* LChunkBuilder::DoSoftDeoptimize(HSoftDeoptimize* instr) {
return AssignEnvironment(new(zone()) LDeoptimize);
}
LInstruction* LChunkBuilder::DoDeoptimize(HDeoptimize* instr) {
return AssignEnvironment(new(zone()) LDeoptimize);
}
LInstruction* LChunkBuilder::DoShift(Token::Value op,
HBitwiseBinaryOperation* instr) {
if (instr->representation().IsTagged()) {
ASSERT(instr->left()->representation().IsTagged());
ASSERT(instr->right()->representation().IsTagged());
LOperand* context = UseFixed(instr->context(), esi);
LOperand* left = UseFixed(instr->left(), edx);
LOperand* right = UseFixed(instr->right(), eax);
LArithmeticT* result = new(zone()) LArithmeticT(op, context, left, right);
return MarkAsCall(DefineFixed(result, eax), instr);
}
ASSERT(instr->representation().IsInteger32());
ASSERT(instr->left()->representation().IsInteger32());
ASSERT(instr->right()->representation().IsInteger32());
LOperand* left = UseRegisterAtStart(instr->left());
HValue* right_value = instr->right();
LOperand* right = NULL;
int constant_value = 0;
if (right_value->IsConstant()) {
HConstant* constant = HConstant::cast(right_value);
right = chunk_->DefineConstantOperand(constant);
constant_value = constant->Integer32Value() & 0x1f;
} else {
right = UseFixed(right_value, ecx);
}
// Shift operations can only deoptimize if we do a logical shift by 0 and
// the result cannot be truncated to int32.
bool may_deopt = (op == Token::SHR && constant_value == 0);
bool does_deopt = false;
if (may_deopt) {
for (HUseIterator it(instr->uses()); !it.Done(); it.Advance()) {
if (!it.value()->CheckFlag(HValue::kTruncatingToInt32)) {
does_deopt = true;
break;
}
}
}
LInstruction* result =
DefineSameAsFirst(new(zone()) LShiftI(op, left, right, does_deopt));
return does_deopt ? AssignEnvironment(result) : result;
}
LInstruction* LChunkBuilder::DoArithmeticD(Token::Value op,
HArithmeticBinaryOperation* instr) {
ASSERT(instr->representation().IsDouble());
ASSERT(instr->left()->representation().IsDouble());
ASSERT(instr->right()->representation().IsDouble());
ASSERT(op != Token::MOD);
LOperand* left = UseRegisterAtStart(instr->left());
LOperand* right = UseRegisterAtStart(instr->right());
LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
return DefineSameAsFirst(result);
}
LInstruction* LChunkBuilder::DoArithmeticT(Token::Value op,
HArithmeticBinaryOperation* instr) {
ASSERT(op == Token::ADD ||
op == Token::DIV ||
op == Token::MOD ||
op == Token::MUL ||
op == Token::SUB);
HValue* left = instr->left();
HValue* right = instr->right();
ASSERT(left->representation().IsTagged());
ASSERT(right->representation().IsTagged());
LOperand* context = UseFixed(instr->context(), esi);
LOperand* left_operand = UseFixed(left, edx);
LOperand* right_operand = UseFixed(right, eax);
LArithmeticT* result =
new(zone()) LArithmeticT(op, context, left_operand, right_operand);
return MarkAsCall(DefineFixed(result, eax), instr);
}
void LChunkBuilder::DoBasicBlock(HBasicBlock* block, HBasicBlock* next_block) {
ASSERT(is_building());
current_block_ = block;
next_block_ = next_block;
if (block->IsStartBlock()) {
block->UpdateEnvironment(graph_->start_environment());
argument_count_ = 0;
} else if (block->predecessors()->length() == 1) {
// We have a single predecessor => copy environment and outgoing
// argument count from the predecessor.
ASSERT(block->phis()->length() == 0);
HBasicBlock* pred = block->predecessors()->at(0);
HEnvironment* last_environment = pred->last_environment();
ASSERT(last_environment != NULL);
// Only copy the environment, if it is later used again.
if (pred->end()->SecondSuccessor() == NULL) {
ASSERT(pred->end()->FirstSuccessor() == block);
} else {
if (pred->end()->FirstSuccessor()->block_id() > block->block_id() ||
pred->end()->SecondSuccessor()->block_id() > block->block_id()) {
last_environment = last_environment->Copy();
}
}
block->UpdateEnvironment(last_environment);
ASSERT(pred->argument_count() >= 0);
argument_count_ = pred->argument_count();
} else {
// We are at a state join => process phis.
HBasicBlock* pred = block->predecessors()->at(0);
// No need to copy the environment, it cannot be used later.
HEnvironment* last_environment = pred->last_environment();
for (int i = 0; i < block->phis()->length(); ++i) {
HPhi* phi = block->phis()->at(i);
last_environment->SetValueAt(phi->merged_index(), phi);
}
for (int i = 0; i < block->deleted_phis()->length(); ++i) {
last_environment->SetValueAt(block->deleted_phis()->at(i),
graph_->GetConstantUndefined());
}
block->UpdateEnvironment(last_environment);
// Pick up the outgoing argument count of one of the predecessors.
argument_count_ = pred->argument_count();
}
HInstruction* current = block->first();
int start = chunk_->instructions()->length();
while (current != NULL && !is_aborted()) {
// Code for constants in registers is generated lazily.
if (!current->EmitAtUses()) {
VisitInstruction(current);
}
current = current->next();
}
int end = chunk_->instructions()->length() - 1;
if (end >= start) {
block->set_first_instruction_index(start);
block->set_last_instruction_index(end);
}
block->set_argument_count(argument_count_);
next_block_ = NULL;
current_block_ = NULL;
}
void LChunkBuilder::VisitInstruction(HInstruction* current) {
HInstruction* old_current = current_instruction_;
current_instruction_ = current;
if (current->has_position()) position_ = current->position();
LInstruction* instr = current->CompileToLithium(this);
if (instr != NULL) {
if (FLAG_stress_pointer_maps && !instr->HasPointerMap()) {
instr = AssignPointerMap(instr);
}
if (FLAG_stress_environments && !instr->HasEnvironment()) {
instr = AssignEnvironment(instr);
}
instr->set_hydrogen_value(current);
chunk_->AddInstruction(instr, current_block_);
}
current_instruction_ = old_current;
}
LEnvironment* LChunkBuilder::CreateEnvironment(
HEnvironment* hydrogen_env,
int* argument_index_accumulator) {
if (hydrogen_env == NULL) return NULL;
LEnvironment* outer =
CreateEnvironment(hydrogen_env->outer(), argument_index_accumulator);
int ast_id = hydrogen_env->ast_id();
ASSERT(ast_id != AstNode::kNoNumber ||
hydrogen_env->frame_type() != JS_FUNCTION);
int value_count = hydrogen_env->length();
LEnvironment* result =
new(zone()) LEnvironment(hydrogen_env->closure(),
hydrogen_env->frame_type(),
ast_id,
hydrogen_env->parameter_count(),
argument_count_,
value_count,
outer,
zone());
int argument_index = *argument_index_accumulator;
for (int i = 0; i < value_count; ++i) {
if (hydrogen_env->is_special_index(i)) continue;
HValue* value = hydrogen_env->values()->at(i);
LOperand* op = NULL;
if (value->IsArgumentsObject()) {
op = NULL;
} else if (value->IsPushArgument()) {
op = new(zone()) LArgument(argument_index++);
} else {
op = UseAny(value);
}
result->AddValue(op, value->representation());
}
if (hydrogen_env->frame_type() == JS_FUNCTION) {
*argument_index_accumulator = argument_index;
}
return result;
}
LInstruction* LChunkBuilder::DoGoto(HGoto* instr) {
return new(zone()) LGoto(instr->FirstSuccessor()->block_id());
}
LInstruction* LChunkBuilder::DoBranch(HBranch* instr) {
HValue* value = instr->value();
if (value->EmitAtUses()) {
ASSERT(value->IsConstant());
ASSERT(!value->representation().IsDouble());
HBasicBlock* successor = HConstant::cast(value)->ToBoolean()
? instr->FirstSuccessor()
: instr->SecondSuccessor();
return new(zone()) LGoto(successor->block_id());
}
// Untagged integers or doubles, smis and booleans don't require a
// deoptimization environment nor a temp register.
Representation rep = value->representation();
HType type = value->type();
if (!rep.IsTagged() || type.IsSmi() || type.IsBoolean()) {
return new(zone()) LBranch(UseRegister(value), NULL);
}
ToBooleanStub::Types expected = instr->expected_input_types();
// We need a temporary register when we have to access the map *or* we have
// no type info yet, in which case we handle all cases (including the ones
// involving maps).
bool needs_temp = expected.NeedsMap() || expected.IsEmpty();
LOperand* temp = needs_temp ? TempRegister() : NULL;
return AssignEnvironment(new(zone()) LBranch(UseRegister(value), temp));
}
LInstruction* LChunkBuilder::DoCompareMap(HCompareMap* instr) {
ASSERT(instr->value()->representation().IsTagged());
LOperand* value = UseRegisterAtStart(instr->value());
return new(zone()) LCmpMapAndBranch(value);
}
LInstruction* LChunkBuilder::DoArgumentsLength(HArgumentsLength* length) {
return DefineAsRegister(new(zone()) LArgumentsLength(Use(length->value())));
}
LInstruction* LChunkBuilder::DoArgumentsElements(HArgumentsElements* elems) {
return DefineAsRegister(new(zone()) LArgumentsElements);
}
LInstruction* LChunkBuilder::DoInstanceOf(HInstanceOf* instr) {
LOperand* left = UseFixed(instr->left(), InstanceofStub::left());
LOperand* right = UseFixed(instr->right(), InstanceofStub::right());
LOperand* context = UseFixed(instr->context(), esi);
LInstanceOf* result = new(zone()) LInstanceOf(context, left, right);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoInstanceOfKnownGlobal(
HInstanceOfKnownGlobal* instr) {
LInstanceOfKnownGlobal* result =
new(zone()) LInstanceOfKnownGlobal(
UseFixed(instr->context(), esi),
UseFixed(instr->left(), InstanceofStub::left()),
FixedTemp(edi));
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) {
LOperand* receiver = UseRegister(instr->receiver());
LOperand* function = UseRegisterAtStart(instr->function());
LOperand* temp = TempRegister();
LWrapReceiver* result =
new(zone()) LWrapReceiver(receiver, function, temp);
return AssignEnvironment(DefineSameAsFirst(result));
}
LInstruction* LChunkBuilder::DoApplyArguments(HApplyArguments* instr) {
LOperand* function = UseFixed(instr->function(), edi);
LOperand* receiver = UseFixed(instr->receiver(), eax);
LOperand* length = UseFixed(instr->length(), ebx);
LOperand* elements = UseFixed(instr->elements(), ecx);
LApplyArguments* result = new(zone()) LApplyArguments(function,
receiver,
length,
elements);
return MarkAsCall(DefineFixed(result, eax), instr, CAN_DEOPTIMIZE_EAGERLY);
}
LInstruction* LChunkBuilder::DoPushArgument(HPushArgument* instr) {
++argument_count_;
LOperand* argument = UseAny(instr->argument());
return new(zone()) LPushArgument(argument);
}
LInstruction* LChunkBuilder::DoThisFunction(HThisFunction* instr) {
return instr->HasNoUses()
? NULL
: DefineAsRegister(new(zone()) LThisFunction);
}
LInstruction* LChunkBuilder::DoContext(HContext* instr) {
return instr->HasNoUses() ? NULL : DefineAsRegister(new(zone()) LContext);
}
LInstruction* LChunkBuilder::DoOuterContext(HOuterContext* instr) {
LOperand* context = UseRegisterAtStart(instr->value());
return DefineAsRegister(new(zone()) LOuterContext(context));
}
LInstruction* LChunkBuilder::DoDeclareGlobals(HDeclareGlobals* instr) {
LOperand* context = UseFixed(instr->context(), esi);
return MarkAsCall(new(zone()) LDeclareGlobals(context), instr);
}
LInstruction* LChunkBuilder::DoGlobalObject(HGlobalObject* instr) {
LOperand* context = UseRegisterAtStart(instr->value());
return DefineAsRegister(new(zone()) LGlobalObject(context));
}
LInstruction* LChunkBuilder::DoGlobalReceiver(HGlobalReceiver* instr) {
LOperand* global_object = UseRegisterAtStart(instr->value());
return DefineAsRegister(new(zone()) LGlobalReceiver(global_object));
}
LInstruction* LChunkBuilder::DoCallConstantFunction(
HCallConstantFunction* instr) {
argument_count_ -= instr->argument_count();
return MarkAsCall(DefineFixed(new(zone()) LCallConstantFunction, eax), instr);
}
LInstruction* LChunkBuilder::DoInvokeFunction(HInvokeFunction* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* function = UseFixed(instr->function(), edi);
argument_count_ -= instr->argument_count();
LInvokeFunction* result = new(zone()) LInvokeFunction(context, function);
return MarkAsCall(DefineFixed(result, eax), instr, CANNOT_DEOPTIMIZE_EAGERLY);
}
LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
BuiltinFunctionId op = instr->op();
if (op == kMathLog) {
ASSERT(instr->representation().IsDouble());
ASSERT(instr->value()->representation().IsDouble());
LOperand* context = UseAny(instr->context()); // Not actually used.
LOperand* input = UseRegisterAtStart(instr->value());
LUnaryMathOperation* result = new(zone()) LUnaryMathOperation(context,
input);
return DefineSameAsFirst(result);
} else if (op == kMathSin || op == kMathCos || op == kMathTan) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* input = UseFixedDouble(instr->value(), xmm1);
LUnaryMathOperation* result = new(zone()) LUnaryMathOperation(context,
input);
return MarkAsCall(DefineFixedDouble(result, xmm1), instr);
} else {
LOperand* input = UseRegisterAtStart(instr->value());
LOperand* context = UseAny(instr->context()); // Deferred use by MathAbs.
if (op == kMathPowHalf) {
LOperand* temp = TempRegister();
LMathPowHalf* result = new(zone()) LMathPowHalf(context, input, temp);
return DefineSameAsFirst(result);
}
LUnaryMathOperation* result = new(zone()) LUnaryMathOperation(context,
input);
switch (op) {
case kMathAbs:
return AssignEnvironment(AssignPointerMap(DefineSameAsFirst(result)));
case kMathFloor:
return AssignEnvironment(DefineAsRegister(result));
case kMathRound:
return AssignEnvironment(DefineAsRegister(result));
case kMathSqrt:
return DefineSameAsFirst(result);
default:
UNREACHABLE();
return NULL;
}
}
}
LInstruction* LChunkBuilder::DoCallKeyed(HCallKeyed* instr) {
ASSERT(instr->key()->representation().IsTagged());
LOperand* context = UseFixed(instr->context(), esi);
LOperand* key = UseFixed(instr->key(), ecx);
argument_count_ -= instr->argument_count();
LCallKeyed* result = new(zone()) LCallKeyed(context, key);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoCallNamed(HCallNamed* instr) {
LOperand* context = UseFixed(instr->context(), esi);
argument_count_ -= instr->argument_count();
LCallNamed* result = new(zone()) LCallNamed(context);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoCallGlobal(HCallGlobal* instr) {
LOperand* context = UseFixed(instr->context(), esi);
argument_count_ -= instr->argument_count();
LCallGlobal* result = new(zone()) LCallGlobal(context);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoCallKnownGlobal(HCallKnownGlobal* instr) {
argument_count_ -= instr->argument_count();
return MarkAsCall(DefineFixed(new(zone()) LCallKnownGlobal, eax), instr);
}
LInstruction* LChunkBuilder::DoCallNew(HCallNew* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* constructor = UseFixed(instr->constructor(), edi);
argument_count_ -= instr->argument_count();
LCallNew* result = new(zone()) LCallNew(context, constructor);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoCallFunction(HCallFunction* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* function = UseFixed(instr->function(), edi);
argument_count_ -= instr->argument_count();
LCallFunction* result = new(zone()) LCallFunction(context, function);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) {
argument_count_ -= instr->argument_count();
LOperand* context = UseFixed(instr->context(), esi);
return MarkAsCall(DefineFixed(new(zone()) LCallRuntime(context), eax), instr);
}
LInstruction* LChunkBuilder::DoShr(HShr* instr) {
return DoShift(Token::SHR, instr);
}
LInstruction* LChunkBuilder::DoSar(HSar* instr) {
return DoShift(Token::SAR, instr);
}
LInstruction* LChunkBuilder::DoShl(HShl* instr) {
return DoShift(Token::SHL, instr);
}
LInstruction* LChunkBuilder::DoBitwise(HBitwise* instr) {
if (instr->representation().IsInteger32()) {
ASSERT(instr->left()->representation().IsInteger32());
ASSERT(instr->right()->representation().IsInteger32());
LOperand* left = UseRegisterAtStart(instr->LeastConstantOperand());
LOperand* right = UseOrConstantAtStart(instr->MostConstantOperand());
return DefineSameAsFirst(new(zone()) LBitI(left, right));
} else {
ASSERT(instr->representation().IsTagged());
ASSERT(instr->left()->representation().IsTagged());
ASSERT(instr->right()->representation().IsTagged());
LOperand* context = UseFixed(instr->context(), esi);
LOperand* left = UseFixed(instr->left(), edx);
LOperand* right = UseFixed(instr->right(), eax);
LArithmeticT* result =
new(zone()) LArithmeticT(instr->op(), context, left, right);
return MarkAsCall(DefineFixed(result, eax), instr);
}
}
LInstruction* LChunkBuilder::DoBitNot(HBitNot* instr) {
ASSERT(instr->value()->representation().IsInteger32());
ASSERT(instr->representation().IsInteger32());
if (instr->HasNoUses()) return NULL;
LOperand* input = UseRegisterAtStart(instr->value());
LBitNotI* result = new(zone()) LBitNotI(input);
return DefineSameAsFirst(result);
}
LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
if (instr->representation().IsDouble()) {
return DoArithmeticD(Token::DIV, instr);
} else if (instr->representation().IsInteger32()) {
// The temporary operand is necessary to ensure that right is not allocated
// into edx.
LOperand* temp = FixedTemp(edx);
LOperand* dividend = UseFixed(instr->left(), eax);
LOperand* divisor = UseRegister(instr->right());
LDivI* result = new(zone()) LDivI(dividend, divisor, temp);
return AssignEnvironment(DefineFixed(result, eax));
} else {
ASSERT(instr->representation().IsTagged());
return DoArithmeticT(Token::DIV, instr);
}
}
HValue* LChunkBuilder::SimplifiedDividendForMathFloorOfDiv(HValue* dividend) {
// A value with an integer representation does not need to be transformed.
if (dividend->representation().IsInteger32()) {
return dividend;
// A change from an integer32 can be replaced by the integer32 value.
} else if (dividend->IsChange() &&
HChange::cast(dividend)->from().IsInteger32()) {
return HChange::cast(dividend)->value();
}
return NULL;
}
HValue* LChunkBuilder::SimplifiedDivisorForMathFloorOfDiv(HValue* divisor) {
if (divisor->IsConstant() &&
HConstant::cast(divisor)->HasInteger32Value()) {
HConstant* constant_val = HConstant::cast(divisor);
return constant_val->CopyToRepresentation(Representation::Integer32(),
divisor->block()->zone());
}
return NULL;
}
LInstruction* LChunkBuilder::DoMathFloorOfDiv(HMathFloorOfDiv* instr) {
HValue* right = instr->right();
ASSERT(right->IsConstant() && HConstant::cast(right)->HasInteger32Value());
LOperand* divisor = chunk_->DefineConstantOperand(HConstant::cast(right));
int32_t divisor_si = HConstant::cast(right)->Integer32Value();
if (divisor_si == 0) {
LOperand* dividend = UseRegister(instr->left());
return AssignEnvironment(DefineAsRegister(
new(zone()) LMathFloorOfDiv(dividend, divisor, NULL)));
} else if (IsPowerOf2(abs(divisor_si))) {
// use dividend as temp if divisor < 0 && divisor != -1
LOperand* dividend = divisor_si < -1 ? UseTempRegister(instr->left()) :
UseRegisterAtStart(instr->left());
LInstruction* result = DefineAsRegister(
new(zone()) LMathFloorOfDiv(dividend, divisor, NULL));
return divisor_si < 0 ? AssignEnvironment(result) : result;
} else {
// needs edx:eax, plus a temp
LOperand* dividend = UseFixed(instr->left(), eax);
LOperand* temp = TempRegister();
LInstruction* result = DefineFixed(
new(zone()) LMathFloorOfDiv(dividend, divisor, temp), edx);
return divisor_si < 0 ? AssignEnvironment(result) : result;
}
}
LInstruction* LChunkBuilder::DoMod(HMod* instr) {
if (instr->representation().IsInteger32()) {
ASSERT(instr->left()->representation().IsInteger32());
ASSERT(instr->right()->representation().IsInteger32());
LInstruction* result;
if (instr->HasPowerOf2Divisor()) {
ASSERT(!instr->CheckFlag(HValue::kCanBeDivByZero));
LOperand* value = UseRegisterAtStart(instr->left());
LModI* mod =
new(zone()) LModI(value, UseOrConstant(instr->right()), NULL);
result = DefineSameAsFirst(mod);
} else {
// The temporary operand is necessary to ensure that right is
// not allocated into edx.
LOperand* temp = FixedTemp(edx);
LOperand* value = UseFixed(instr->left(), eax);
LOperand* divisor = UseRegister(instr->right());
LModI* mod = new(zone()) LModI(value, divisor, temp);
result = DefineFixed(mod, edx);
}
return (instr->CheckFlag(HValue::kBailoutOnMinusZero) ||
instr->CheckFlag(HValue::kCanBeDivByZero))
? AssignEnvironment(result)
: result;
} else if (instr->representation().IsTagged()) {
return DoArithmeticT(Token::MOD, instr);
} else {
ASSERT(instr->representation().IsDouble());
// We call a C function for double modulo. It can't trigger a GC.
// We need to use fixed result register for the call.
// TODO(fschneider): Allow any register as input registers.
LOperand* left = UseFixedDouble(instr->left(), xmm2);
LOperand* right = UseFixedDouble(instr->right(), xmm1);
LArithmeticD* result = new(zone()) LArithmeticD(Token::MOD, left, right);
return MarkAsCall(DefineFixedDouble(result, xmm1), instr);
}
}
LInstruction* LChunkBuilder::DoMul(HMul* instr) {
if (instr->representation().IsInteger32()) {
ASSERT(instr->left()->representation().IsInteger32());
ASSERT(instr->right()->representation().IsInteger32());
LOperand* left = UseRegisterAtStart(instr->LeastConstantOperand());
LOperand* right = UseOrConstant(instr->MostConstantOperand());
LOperand* temp = NULL;
if (instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
temp = TempRegister();
}
LMulI* mul = new(zone()) LMulI(left, right, temp);
if (instr->CheckFlag(HValue::kCanOverflow) ||
instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
AssignEnvironment(mul);
}
return DefineSameAsFirst(mul);
} else if (instr->representation().IsDouble()) {
return DoArithmeticD(Token::MUL, instr);
} else {
ASSERT(instr->representation().IsTagged());
return DoArithmeticT(Token::MUL, instr);
}
}
LInstruction* LChunkBuilder::DoSub(HSub* instr) {
if (instr->representation().IsInteger32()) {
ASSERT(instr->left()->representation().IsInteger32());
ASSERT(instr->right()->representation().IsInteger32());
LOperand* left = UseRegisterAtStart(instr->left());
LOperand* right = UseOrConstantAtStart(instr->right());
LSubI* sub = new(zone()) LSubI(left, right);
LInstruction* result = DefineSameAsFirst(sub);
if (instr->CheckFlag(HValue::kCanOverflow)) {
result = AssignEnvironment(result);
}
return result;
} else if (instr->representation().IsDouble()) {
return DoArithmeticD(Token::SUB, instr);
} else {
ASSERT(instr->representation().IsTagged());
return DoArithmeticT(Token::SUB, instr);
}
}
LInstruction* LChunkBuilder::DoAdd(HAdd* instr) {
if (instr->representation().IsInteger32()) {
ASSERT(instr->left()->representation().IsInteger32());
ASSERT(instr->right()->representation().IsInteger32());
LOperand* left = UseRegisterAtStart(instr->LeastConstantOperand());
LOperand* right = UseOrConstantAtStart(instr->MostConstantOperand());
LAddI* add = new(zone()) LAddI(left, right);
LInstruction* result = DefineSameAsFirst(add);
if (instr->CheckFlag(HValue::kCanOverflow)) {
result = AssignEnvironment(result);
}
return result;
} else if (instr->representation().IsDouble()) {
return DoArithmeticD(Token::ADD, instr);
} else {
ASSERT(instr->representation().IsTagged());
return DoArithmeticT(Token::ADD, instr);
}
}
LInstruction* LChunkBuilder::DoPower(HPower* instr) {
ASSERT(instr->representation().IsDouble());
// We call a C function for double power. It can't trigger a GC.
// We need to use fixed result register for the call.
Representation exponent_type = instr->right()->representation();
ASSERT(instr->left()->representation().IsDouble());
LOperand* left = UseFixedDouble(instr->left(), xmm2);
LOperand* right = exponent_type.IsDouble() ?
UseFixedDouble(instr->right(), xmm1) :
UseFixed(instr->right(), eax);
LPower* result = new(zone()) LPower(left, right);
return MarkAsCall(DefineFixedDouble(result, xmm3), instr,
CAN_DEOPTIMIZE_EAGERLY);
}
LInstruction* LChunkBuilder::DoRandom(HRandom* instr) {
ASSERT(instr->representation().IsDouble());
ASSERT(instr->global_object()->representation().IsTagged());
LOperand* global_object = UseFixed(instr->global_object(), eax);
LRandom* result = new(zone()) LRandom(global_object);
return MarkAsCall(DefineFixedDouble(result, xmm1), instr);
}
LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
ASSERT(instr->left()->representation().IsTagged());
ASSERT(instr->right()->representation().IsTagged());
LOperand* context = UseFixed(instr->context(), esi);
LOperand* left = UseFixed(instr->left(), edx);
LOperand* right = UseFixed(instr->right(), eax);
LCmpT* result = new(zone()) LCmpT(context, left, right);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoCompareIDAndBranch(
HCompareIDAndBranch* instr) {
Representation r = instr->GetInputRepresentation();
if (r.IsInteger32()) {
ASSERT(instr->left()->representation().IsInteger32());
ASSERT(instr->right()->representation().IsInteger32());
LOperand* left = UseRegisterOrConstantAtStart(instr->left());
LOperand* right = UseOrConstantAtStart(instr->right());
return new(zone()) LCmpIDAndBranch(left, right);
} else {
ASSERT(r.IsDouble());
ASSERT(instr->left()->representation().IsDouble());
ASSERT(instr->right()->representation().IsDouble());
LOperand* left;
LOperand* right;
if (instr->left()->IsConstant() && instr->right()->IsConstant()) {
left = UseRegisterOrConstantAtStart(instr->left());
right = UseRegisterOrConstantAtStart(instr->right());
} else {
left = UseRegisterAtStart(instr->left());
right = UseRegisterAtStart(instr->right());
}
return new(zone()) LCmpIDAndBranch(left, right);
}
}
LInstruction* LChunkBuilder::DoCompareObjectEqAndBranch(
HCompareObjectEqAndBranch* instr) {
LOperand* left = UseRegisterAtStart(instr->left());
LOperand* right = UseAtStart(instr->right());
return new(zone()) LCmpObjectEqAndBranch(left, right);
}
LInstruction* LChunkBuilder::DoCompareConstantEqAndBranch(
HCompareConstantEqAndBranch* instr) {
return new(zone()) LCmpConstantEqAndBranch(
UseRegisterAtStart(instr->value()));
}
LInstruction* LChunkBuilder::DoIsNilAndBranch(HIsNilAndBranch* instr) {
// We only need a temp register for non-strict compare.
LOperand* temp = instr->kind() == kStrictEquality ? NULL : TempRegister();
return new(zone()) LIsNilAndBranch(UseRegisterAtStart(instr->value()), temp);
}
LInstruction* LChunkBuilder::DoIsObjectAndBranch(HIsObjectAndBranch* instr) {
ASSERT(instr->value()->representation().IsTagged());
LOperand* temp = TempRegister();
return new(zone()) LIsObjectAndBranch(UseRegister(instr->value()), temp);
}
LInstruction* LChunkBuilder::DoIsStringAndBranch(HIsStringAndBranch* instr) {
ASSERT(instr->value()->representation().IsTagged());
LOperand* temp = TempRegister();
return new(zone()) LIsStringAndBranch(UseRegister(instr->value()), temp);
}
LInstruction* LChunkBuilder::DoIsSmiAndBranch(HIsSmiAndBranch* instr) {
ASSERT(instr->value()->representation().IsTagged());
return new(zone()) LIsSmiAndBranch(Use(instr->value()));
}
LInstruction* LChunkBuilder::DoIsUndetectableAndBranch(
HIsUndetectableAndBranch* instr) {
ASSERT(instr ->value()->representation().IsTagged());
return new(zone()) LIsUndetectableAndBranch(
UseRegisterAtStart(instr->value()), TempRegister());
}
LInstruction* LChunkBuilder::DoStringCompareAndBranch(
HStringCompareAndBranch* instr) {
ASSERT(instr->left()->representation().IsTagged());
ASSERT(instr->right()->representation().IsTagged());
LOperand* context = UseFixed(instr->context(), esi);
LOperand* left = UseFixed(instr->left(), edx);
LOperand* right = UseFixed(instr->right(), eax);
LStringCompareAndBranch* result = new(zone())
LStringCompareAndBranch(context, left, right);
return MarkAsCall(result, instr);
}
LInstruction* LChunkBuilder::DoHasInstanceTypeAndBranch(
HHasInstanceTypeAndBranch* instr) {
ASSERT(instr->value()->representation().IsTagged());
return new(zone()) LHasInstanceTypeAndBranch(
UseRegisterAtStart(instr->value()),
TempRegister());
}
LInstruction* LChunkBuilder::DoGetCachedArrayIndex(
HGetCachedArrayIndex* instr) {
ASSERT(instr->value()->representation().IsTagged());
LOperand* value = UseRegisterAtStart(instr->value());
return DefineAsRegister(new(zone()) LGetCachedArrayIndex(value));
}
LInstruction* LChunkBuilder::DoHasCachedArrayIndexAndBranch(
HHasCachedArrayIndexAndBranch* instr) {
ASSERT(instr->value()->representation().IsTagged());
return new(zone()) LHasCachedArrayIndexAndBranch(
UseRegisterAtStart(instr->value()));
}
LInstruction* LChunkBuilder::DoClassOfTestAndBranch(
HClassOfTestAndBranch* instr) {
ASSERT(instr->value()->representation().IsTagged());
return new(zone()) LClassOfTestAndBranch(UseRegister(instr->value()),
TempRegister(),
TempRegister());
}
LInstruction* LChunkBuilder::DoJSArrayLength(HJSArrayLength* instr) {
LOperand* array = UseRegisterAtStart(instr->value());
return DefineAsRegister(new(zone()) LJSArrayLength(array));
}
LInstruction* LChunkBuilder::DoFixedArrayBaseLength(
HFixedArrayBaseLength* instr) {
LOperand* array = UseRegisterAtStart(instr->value());
return DefineAsRegister(new(zone()) LFixedArrayBaseLength(array));
}
LInstruction* LChunkBuilder::DoElementsKind(HElementsKind* instr) {
LOperand* object = UseRegisterAtStart(instr->value());
return DefineAsRegister(new(zone()) LElementsKind(object));
}
LInstruction* LChunkBuilder::DoValueOf(HValueOf* instr) {
LOperand* object = UseRegister(instr->value());
LValueOf* result = new(zone()) LValueOf(object, TempRegister());
return DefineSameAsFirst(result);
}
LInstruction* LChunkBuilder::DoDateField(HDateField* instr) {
LOperand* date = UseFixed(instr->value(), eax);
LDateField* result =
new(zone()) LDateField(date, FixedTemp(ecx), instr->index());
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoBoundsCheck(HBoundsCheck* instr) {
return AssignEnvironment(new(zone()) LBoundsCheck(
UseRegisterOrConstantAtStart(instr->index()),
UseAtStart(instr->length())));
}
LInstruction* LChunkBuilder::DoAbnormalExit(HAbnormalExit* instr) {
// The control instruction marking the end of a block that completed
// abruptly (e.g., threw an exception). There is nothing specific to do.
return NULL;
}
LInstruction* LChunkBuilder::DoThrow(HThrow* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* value = UseFixed(instr->value(), eax);
return MarkAsCall(new(zone()) LThrow(context, value), instr);
}
LInstruction* LChunkBuilder::DoUseConst(HUseConst* instr) {
return NULL;
}
LInstruction* LChunkBuilder::DoForceRepresentation(HForceRepresentation* bad) {
// All HForceRepresentation instructions should be eliminated in the
// representation change phase of Hydrogen.
UNREACHABLE();
return NULL;
}
LInstruction* LChunkBuilder::DoChange(HChange* instr) {
Representation from = instr->from();
Representation to = instr->to();
if (from.IsTagged()) {
if (to.IsDouble()) {
LOperand* value = UseRegister(instr->value());
// Temp register only necessary for minus zero check.
LOperand* temp = instr->deoptimize_on_minus_zero()
? TempRegister()
: NULL;
LNumberUntagD* res = new(zone()) LNumberUntagD(value, temp);
return AssignEnvironment(DefineAsRegister(res));
} else {
ASSERT(to.IsInteger32());
LOperand* value = UseRegister(instr->value());
if (instr->value()->type().IsSmi()) {
return DefineSameAsFirst(new(zone()) LSmiUntag(value, false));
} else {
bool truncating = instr->CanTruncateToInt32();
LOperand* xmm_temp =
(truncating && CpuFeatures::IsSupported(SSE3))
? NULL
: FixedTemp(xmm1);
LTaggedToI* res = new(zone()) LTaggedToI(value, xmm_temp);
return AssignEnvironment(DefineSameAsFirst(res));
}
}
} else if (from.IsDouble()) {
if (to.IsTagged()) {
LOperand* value = UseRegister(instr->value());
LOperand* temp = TempRegister();
// Make sure that temp and result_temp are different registers.
LUnallocated* result_temp = TempRegister();
LNumberTagD* result = new(zone()) LNumberTagD(value, temp);
return AssignPointerMap(Define(result, result_temp));
} else {
ASSERT(to.IsInteger32());
bool truncating = instr->CanTruncateToInt32();
bool needs_temp = truncating && !CpuFeatures::IsSupported(SSE3);
LOperand* value = needs_temp ?
UseTempRegister(instr->value()) : UseRegister(instr->value());
LOperand* temp = needs_temp ? TempRegister() : NULL;
return AssignEnvironment(
DefineAsRegister(new(zone()) LDoubleToI(value, temp)));
}
} else if (from.IsInteger32()) {
if (to.IsTagged()) {
HValue* val = instr->value();
LOperand* value = UseRegister(val);
if (val->HasRange() && val->range()->IsInSmiRange()) {
return DefineSameAsFirst(new(zone()) LSmiTag(value));
} else {
LNumberTagI* result = new(zone()) LNumberTagI(value);
return AssignEnvironment(AssignPointerMap(DefineSameAsFirst(result)));
}
} else {
ASSERT(to.IsDouble());
return DefineAsRegister(
new(zone()) LInteger32ToDouble(Use(instr->value())));
}
}
UNREACHABLE();
return NULL;
}
LInstruction* LChunkBuilder::DoCheckNonSmi(HCheckNonSmi* instr) {
LOperand* value = UseAtStart(instr->value());
return AssignEnvironment(new(zone()) LCheckNonSmi(value));
}
LInstruction* LChunkBuilder::DoCheckInstanceType(HCheckInstanceType* instr) {
LOperand* value = UseRegisterAtStart(instr->value());
LOperand* temp = TempRegister();
LCheckInstanceType* result = new(zone()) LCheckInstanceType(value, temp);
return AssignEnvironment(result);
}
LInstruction* LChunkBuilder::DoCheckPrototypeMaps(HCheckPrototypeMaps* instr) {
LOperand* temp = TempRegister();
LCheckPrototypeMaps* result = new(zone()) LCheckPrototypeMaps(temp);
return AssignEnvironment(result);
}
LInstruction* LChunkBuilder::DoCheckSmi(HCheckSmi* instr) {
LOperand* value = UseAtStart(instr->value());
return AssignEnvironment(new(zone()) LCheckSmi(value));
}
LInstruction* LChunkBuilder::DoCheckFunction(HCheckFunction* instr) {
// If the target is in new space, we'll emit a global cell compare and so
// want the value in a register. If the target gets promoted before we
// emit code, we will still get the register but will do an immediate
// compare instead of the cell compare. This is safe.
LOperand* value = Isolate::Current()->heap()->InNewSpace(*instr->target())
? UseRegisterAtStart(instr->value())
: UseAtStart(instr->value());
return AssignEnvironment(new(zone()) LCheckFunction(value));
}
LInstruction* LChunkBuilder::DoCheckMaps(HCheckMaps* instr) {
LOperand* value = UseRegisterAtStart(instr->value());
LCheckMaps* result = new(zone()) LCheckMaps(value);
return AssignEnvironment(result);
}
LInstruction* LChunkBuilder::DoClampToUint8(HClampToUint8* instr) {
HValue* value = instr->value();
Representation input_rep = value->representation();
if (input_rep.IsDouble()) {
LOperand* reg = UseRegister(value);
return DefineAsRegister(new(zone()) LClampDToUint8(reg));
} else if (input_rep.IsInteger32()) {
LOperand* reg = UseFixed(value, eax);
return DefineFixed(new(zone()) LClampIToUint8(reg), eax);
} else {
ASSERT(input_rep.IsTagged());
LOperand* reg = UseFixed(value, eax);
// Register allocator doesn't (yet) support allocation of double
// temps. Reserve xmm1 explicitly.
LOperand* temp = FixedTemp(xmm1);
LClampTToUint8* result = new(zone()) LClampTToUint8(reg, temp);
return AssignEnvironment(DefineFixed(result, eax));
}
}
LInstruction* LChunkBuilder::DoReturn(HReturn* instr) {
return new(zone()) LReturn(UseFixed(instr->value(), eax));
}
LInstruction* LChunkBuilder::DoConstant(HConstant* instr) {
Representation r = instr->representation();
if (r.IsInteger32()) {
return DefineAsRegister(new(zone()) LConstantI);
} else if (r.IsDouble()) {
double value = instr->DoubleValue();
LOperand* temp = (BitCast<uint64_t, double>(value) != 0)
? TempRegister()
: NULL;
return DefineAsRegister(new(zone()) LConstantD(temp));
} else if (r.IsTagged()) {
return DefineAsRegister(new(zone()) LConstantT);
} else {
UNREACHABLE();
return NULL;
}
}
LInstruction* LChunkBuilder::DoLoadGlobalCell(HLoadGlobalCell* instr) {
LLoadGlobalCell* result = new(zone()) LLoadGlobalCell;
return instr->RequiresHoleCheck()
? AssignEnvironment(DefineAsRegister(result))
: DefineAsRegister(result);
}
LInstruction* LChunkBuilder::DoLoadGlobalGeneric(HLoadGlobalGeneric* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* global_object = UseFixed(instr->global_object(), edx);
LLoadGlobalGeneric* result =
new(zone()) LLoadGlobalGeneric(context, global_object);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoStoreGlobalCell(HStoreGlobalCell* instr) {
LStoreGlobalCell* result =
new(zone()) LStoreGlobalCell(UseRegister(instr->value()));
return instr->RequiresHoleCheck() ? AssignEnvironment(result) : result;
}
LInstruction* LChunkBuilder::DoStoreGlobalGeneric(HStoreGlobalGeneric* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* global_object = UseFixed(instr->global_object(), edx);
LOperand* value = UseFixed(instr->value(), eax);
LStoreGlobalGeneric* result =
new(zone()) LStoreGlobalGeneric(context, global_object, value);
return MarkAsCall(result, instr);
}
LInstruction* LChunkBuilder::DoLoadContextSlot(HLoadContextSlot* instr) {
LOperand* context = UseRegisterAtStart(instr->value());
LInstruction* result =
DefineAsRegister(new(zone()) LLoadContextSlot(context));
return instr->RequiresHoleCheck() ? AssignEnvironment(result) : result;
}
LInstruction* LChunkBuilder::DoStoreContextSlot(HStoreContextSlot* instr) {
LOperand* value;
LOperand* temp;
LOperand* context = UseRegister(instr->context());
if (instr->NeedsWriteBarrier()) {
value = UseTempRegister(instr->value());
temp = TempRegister();
} else {
value = UseRegister(instr->value());
temp = NULL;
}
LInstruction* result = new(zone()) LStoreContextSlot(context, value, temp);
return instr->RequiresHoleCheck() ? AssignEnvironment(result) : result;
}
LInstruction* LChunkBuilder::DoLoadNamedField(HLoadNamedField* instr) {
ASSERT(instr->representation().IsTagged());
LOperand* obj = UseRegisterAtStart(instr->object());
return DefineAsRegister(new(zone()) LLoadNamedField(obj));
}
LInstruction* LChunkBuilder::DoLoadNamedFieldPolymorphic(
HLoadNamedFieldPolymorphic* instr) {
ASSERT(instr->representation().IsTagged());
if (instr->need_generic()) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* obj = UseFixed(instr->object(), edx);
LLoadNamedFieldPolymorphic* result =
new(zone()) LLoadNamedFieldPolymorphic(context, obj);
return MarkAsCall(DefineFixed(result, eax), instr);
} else {
LOperand* context = UseAny(instr->context()); // Not actually used.
LOperand* obj = UseRegisterAtStart(instr->object());
LLoadNamedFieldPolymorphic* result =
new(zone()) LLoadNamedFieldPolymorphic(context, obj);
return AssignEnvironment(DefineAsRegister(result));
}
}
LInstruction* LChunkBuilder::DoLoadNamedGeneric(HLoadNamedGeneric* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* object = UseFixed(instr->object(), edx);
LLoadNamedGeneric* result = new(zone()) LLoadNamedGeneric(context, object);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoLoadFunctionPrototype(
HLoadFunctionPrototype* instr) {
return AssignEnvironment(DefineAsRegister(
new(zone()) LLoadFunctionPrototype(UseRegister(instr->function()),
TempRegister())));
}
LInstruction* LChunkBuilder::DoLoadElements(HLoadElements* instr) {
LOperand* input = UseRegisterAtStart(instr->value());
return DefineAsRegister(new(zone()) LLoadElements(input));
}
LInstruction* LChunkBuilder::DoLoadExternalArrayPointer(
HLoadExternalArrayPointer* instr) {
LOperand* input = UseRegisterAtStart(instr->value());
return DefineAsRegister(new(zone()) LLoadExternalArrayPointer(input));
}
LInstruction* LChunkBuilder::DoLoadKeyedFastElement(
HLoadKeyedFastElement* instr) {
ASSERT(instr->representation().IsTagged());
ASSERT(instr->key()->representation().IsInteger32());
LOperand* obj = UseRegisterAtStart(instr->object());
LOperand* key = UseRegisterOrConstantAtStart(instr->key());
LLoadKeyedFastElement* result = new(zone()) LLoadKeyedFastElement(obj, key);
if (instr->RequiresHoleCheck()) AssignEnvironment(result);
return DefineAsRegister(result);
}
LInstruction* LChunkBuilder::DoLoadKeyedFastDoubleElement(
HLoadKeyedFastDoubleElement* instr) {
ASSERT(instr->representation().IsDouble());
ASSERT(instr->key()->representation().IsInteger32());
LOperand* elements = UseRegisterAtStart(instr->elements());
LOperand* key = UseRegisterOrConstantAtStart(instr->key());
LLoadKeyedFastDoubleElement* result =
new(zone()) LLoadKeyedFastDoubleElement(elements, key);
return AssignEnvironment(DefineAsRegister(result));
}
LInstruction* LChunkBuilder::DoLoadKeyedSpecializedArrayElement(
HLoadKeyedSpecializedArrayElement* instr) {
ElementsKind elements_kind = instr->elements_kind();
ASSERT(
(instr->representation().IsInteger32() &&
(elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
(elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
(instr->representation().IsDouble() &&
((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
(elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
ASSERT(instr->key()->representation().IsInteger32());
LOperand* external_pointer = UseRegister(instr->external_pointer());
LOperand* key = UseRegisterOrConstant(instr->key());
LLoadKeyedSpecializedArrayElement* result =
new(zone()) LLoadKeyedSpecializedArrayElement(external_pointer, key);
LInstruction* load_instr = DefineAsRegister(result);
// An unsigned int array load might overflow and cause a deopt, make sure it
// has an environment.
return (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS)
? AssignEnvironment(load_instr)
: load_instr;
}
LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* object = UseFixed(instr->object(), edx);
LOperand* key = UseFixed(instr->key(), ecx);
LLoadKeyedGeneric* result =
new(zone()) LLoadKeyedGeneric(context, object, key);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoStoreKeyedFastElement(
HStoreKeyedFastElement* instr) {
bool needs_write_barrier = instr->NeedsWriteBarrier();
ASSERT(instr->value()->representation().IsTagged());
ASSERT(instr->object()->representation().IsTagged());
ASSERT(instr->key()->representation().IsInteger32());
LOperand* obj = UseRegister(instr->object());
LOperand* val = needs_write_barrier
? UseTempRegister(instr->value())
: UseRegisterAtStart(instr->value());
LOperand* key = needs_write_barrier
? UseTempRegister(instr->key())
: UseRegisterOrConstantAtStart(instr->key());
return new(zone()) LStoreKeyedFastElement(obj, key, val);
}
LInstruction* LChunkBuilder::DoStoreKeyedFastDoubleElement(
HStoreKeyedFastDoubleElement* instr) {
ASSERT(instr->value()->representation().IsDouble());
ASSERT(instr->elements()->representation().IsTagged());
ASSERT(instr->key()->representation().IsInteger32());
LOperand* elements = UseRegisterAtStart(instr->elements());
LOperand* val = UseTempRegister(instr->value());
LOperand* key = UseRegisterOrConstantAtStart(instr->key());
return new(zone()) LStoreKeyedFastDoubleElement(elements, key, val);
}
LInstruction* LChunkBuilder::DoStoreKeyedSpecializedArrayElement(
HStoreKeyedSpecializedArrayElement* instr) {
ElementsKind elements_kind = instr->elements_kind();
ASSERT(
(instr->value()->representation().IsInteger32() &&
(elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
(elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
(instr->value()->representation().IsDouble() &&
((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
(elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
ASSERT(instr->external_pointer()->representation().IsExternal());
ASSERT(instr->key()->representation().IsInteger32());
LOperand* external_pointer = UseRegister(instr->external_pointer());
LOperand* key = UseRegisterOrConstant(instr->key());
LOperand* val = NULL;
if (elements_kind == EXTERNAL_BYTE_ELEMENTS ||
elements_kind == EXTERNAL_UNSIGNED_BYTE_ELEMENTS ||
elements_kind == EXTERNAL_PIXEL_ELEMENTS) {
// We need a byte register in this case for the value.
val = UseFixed(instr->value(), eax);
} else {
val = UseRegister(instr->value());
}
return new(zone()) LStoreKeyedSpecializedArrayElement(external_pointer,
key,
val);
}
LInstruction* LChunkBuilder::DoStoreKeyedGeneric(HStoreKeyedGeneric* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* object = UseFixed(instr->object(), edx);
LOperand* key = UseFixed(instr->key(), ecx);
LOperand* value = UseFixed(instr->value(), eax);
ASSERT(instr->object()->representation().IsTagged());
ASSERT(instr->key()->representation().IsTagged());
ASSERT(instr->value()->representation().IsTagged());
LStoreKeyedGeneric* result =
new(zone()) LStoreKeyedGeneric(context, object, key, value);
return MarkAsCall(result, instr);
}
LInstruction* LChunkBuilder::DoTransitionElementsKind(
HTransitionElementsKind* instr) {
ElementsKind from_kind = instr->original_map()->elements_kind();
ElementsKind to_kind = instr->transitioned_map()->elements_kind();
if (IsSimpleMapChangeTransition(from_kind, to_kind)) {
LOperand* object = UseRegister(instr->object());
LOperand* new_map_reg = TempRegister();
LOperand* temp_reg = TempRegister();
LTransitionElementsKind* result =
new(zone()) LTransitionElementsKind(object, new_map_reg, temp_reg);
return DefineSameAsFirst(result);
} else {
LOperand* object = UseFixed(instr->object(), eax);
LOperand* fixed_object_reg = FixedTemp(edx);
LOperand* new_map_reg = FixedTemp(ebx);
LTransitionElementsKind* result =
new(zone()) LTransitionElementsKind(object,
new_map_reg,
fixed_object_reg);
return MarkAsCall(DefineFixed(result, eax), instr);
}
}
LInstruction* LChunkBuilder::DoStoreNamedField(HStoreNamedField* instr) {
bool needs_write_barrier = instr->NeedsWriteBarrier();
bool needs_write_barrier_for_map = !instr->transition().is_null() &&
instr->NeedsWriteBarrierForMap();
LOperand* obj;
if (needs_write_barrier) {
obj = instr->is_in_object()
? UseRegister(instr->object())
: UseTempRegister(instr->object());
} else {
obj = needs_write_barrier_for_map
? UseRegister(instr->object())
: UseRegisterAtStart(instr->object());
}
LOperand* val = needs_write_barrier
? UseTempRegister(instr->value())
: UseRegister(instr->value());
// We only need a scratch register if we have a write barrier or we
// have a store into the properties array (not in-object-property).
LOperand* temp = (!instr->is_in_object() || needs_write_barrier ||
needs_write_barrier_for_map) ? TempRegister() : NULL;
// We need a temporary register for write barrier of the map field.
LOperand* temp_map = needs_write_barrier_for_map ? TempRegister() : NULL;
return new(zone()) LStoreNamedField(obj, val, temp, temp_map);
}
LInstruction* LChunkBuilder::DoStoreNamedGeneric(HStoreNamedGeneric* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* object = UseFixed(instr->object(), edx);
LOperand* value = UseFixed(instr->value(), eax);
LStoreNamedGeneric* result =
new(zone()) LStoreNamedGeneric(context, object, value);
return MarkAsCall(result, instr);
}
LInstruction* LChunkBuilder::DoStringAdd(HStringAdd* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* left = UseOrConstantAtStart(instr->left());
LOperand* right = UseOrConstantAtStart(instr->right());
LStringAdd* string_add = new(zone()) LStringAdd(context, left, right);
return MarkAsCall(DefineFixed(string_add, eax), instr);
}
LInstruction* LChunkBuilder::DoStringCharCodeAt(HStringCharCodeAt* instr) {
LOperand* string = UseTempRegister(instr->string());
LOperand* index = UseTempRegister(instr->index());
LOperand* context = UseAny(instr->context());
LStringCharCodeAt* result =
new(zone()) LStringCharCodeAt(context, string, index);
return AssignEnvironment(AssignPointerMap(DefineAsRegister(result)));
}
LInstruction* LChunkBuilder::DoStringCharFromCode(HStringCharFromCode* instr) {
LOperand* char_code = UseRegister(instr->value());
LOperand* context = UseAny(instr->context());
LStringCharFromCode* result =
new(zone()) LStringCharFromCode(context, char_code);
return AssignPointerMap(DefineAsRegister(result));
}
LInstruction* LChunkBuilder::DoStringLength(HStringLength* instr) {
LOperand* string = UseRegisterAtStart(instr->value());
return DefineAsRegister(new(zone()) LStringLength(string));
}
LInstruction* LChunkBuilder::DoAllocateObject(HAllocateObject* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* temp = TempRegister();
LAllocateObject* result = new(zone()) LAllocateObject(context, temp);
return AssignPointerMap(DefineAsRegister(result));
}
LInstruction* LChunkBuilder::DoFastLiteral(HFastLiteral* instr) {
LOperand* context = UseFixed(instr->context(), esi);
return MarkAsCall(
DefineFixed(new(zone()) LFastLiteral(context), eax), instr);
}
LInstruction* LChunkBuilder::DoArrayLiteral(HArrayLiteral* instr) {
LOperand* context = UseFixed(instr->context(), esi);
return MarkAsCall(
DefineFixed(new(zone()) LArrayLiteral(context), eax), instr);
}
LInstruction* LChunkBuilder::DoObjectLiteral(HObjectLiteral* instr) {
LOperand* context = UseFixed(instr->context(), esi);
return MarkAsCall(
DefineFixed(new(zone()) LObjectLiteral(context), eax), instr);
}
LInstruction* LChunkBuilder::DoRegExpLiteral(HRegExpLiteral* instr) {
LOperand* context = UseFixed(instr->context(), esi);
return MarkAsCall(
DefineFixed(new(zone()) LRegExpLiteral(context), eax), instr);
}
LInstruction* LChunkBuilder::DoFunctionLiteral(HFunctionLiteral* instr) {
LOperand* context = UseFixed(instr->context(), esi);
return MarkAsCall(
DefineFixed(new(zone()) LFunctionLiteral(context), eax), instr);
}
LInstruction* LChunkBuilder::DoDeleteProperty(HDeleteProperty* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* object = UseAtStart(instr->object());
LOperand* key = UseOrConstantAtStart(instr->key());
LDeleteProperty* result = new(zone()) LDeleteProperty(context, object, key);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoOsrEntry(HOsrEntry* instr) {
allocator_->MarkAsOsrEntry();
current_block_->last_environment()->set_ast_id(instr->ast_id());
return AssignEnvironment(new(zone()) LOsrEntry);
}
LInstruction* LChunkBuilder::DoParameter(HParameter* instr) {
int spill_index = chunk()->GetParameterStackSlot(instr->index());
return DefineAsSpilled(new(zone()) LParameter, spill_index);
}
LInstruction* LChunkBuilder::DoUnknownOSRValue(HUnknownOSRValue* instr) {
int spill_index = chunk()->GetNextSpillIndex(false); // Not double-width.
if (spill_index > LUnallocated::kMaxFixedIndex) {
Abort("Too many spill slots needed for OSR");
spill_index = 0;
}
return DefineAsSpilled(new(zone()) LUnknownOSRValue, spill_index);
}
LInstruction* LChunkBuilder::DoCallStub(HCallStub* instr) {
LOperand* context = UseFixed(instr->context(), esi);
argument_count_ -= instr->argument_count();
LCallStub* result = new(zone()) LCallStub(context);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoArgumentsObject(HArgumentsObject* instr) {
// There are no real uses of the arguments object.
// arguments.length and element access are supported directly on
// stack arguments, and any real arguments object use causes a bailout.
// So this value is never used.
return NULL;
}
LInstruction* LChunkBuilder::DoAccessArgumentsAt(HAccessArgumentsAt* instr) {
LOperand* arguments = UseRegister(instr->arguments());
LOperand* length = UseTempRegister(instr->length());
LOperand* index = Use(instr->index());
LAccessArgumentsAt* result =
new(zone()) LAccessArgumentsAt(arguments, length, index);
return AssignEnvironment(DefineAsRegister(result));
}
LInstruction* LChunkBuilder::DoToFastProperties(HToFastProperties* instr) {
LOperand* object = UseFixed(instr->value(), eax);
LToFastProperties* result = new(zone()) LToFastProperties(object);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoTypeof(HTypeof* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* value = UseAtStart(instr->value());
LTypeof* result = new(zone()) LTypeof(context, value);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoTypeofIsAndBranch(HTypeofIsAndBranch* instr) {
return new(zone()) LTypeofIsAndBranch(UseTempRegister(instr->value()));
}
LInstruction* LChunkBuilder::DoIsConstructCallAndBranch(
HIsConstructCallAndBranch* instr) {
return new(zone()) LIsConstructCallAndBranch(TempRegister());
}
LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
HEnvironment* env = current_block_->last_environment();
ASSERT(env != NULL);
env->set_ast_id(instr->ast_id());
env->Drop(instr->pop_count());
for (int i = 0; i < instr->values()->length(); ++i) {
HValue* value = instr->values()->at(i);
if (instr->HasAssignedIndexAt(i)) {
env->Bind(instr->GetAssignedIndexAt(i), value);
} else {
env->Push(value);
}
}
// If there is an instruction pending deoptimization environment create a
// lazy bailout instruction to capture the environment.
if (pending_deoptimization_ast_id_ != AstNode::kNoNumber) {
ASSERT(pending_deoptimization_ast_id_ == instr->ast_id());
LLazyBailout* lazy_bailout = new(zone()) LLazyBailout;
LInstruction* result = AssignEnvironment(lazy_bailout);
// Store the lazy deopt environment with the instruction if needed. Right
// now it is only used for LInstanceOfKnownGlobal.
instruction_pending_deoptimization_environment_->
SetDeferredLazyDeoptimizationEnvironment(result->environment());
instruction_pending_deoptimization_environment_ = NULL;
pending_deoptimization_ast_id_ = AstNode::kNoNumber;
return result;
}
return NULL;
}
LInstruction* LChunkBuilder::DoStackCheck(HStackCheck* instr) {
if (instr->is_function_entry()) {
LOperand* context = UseFixed(instr->context(), esi);
return MarkAsCall(new(zone()) LStackCheck(context), instr);
} else {
ASSERT(instr->is_backwards_branch());
LOperand* context = UseAny(instr->context());
return AssignEnvironment(
AssignPointerMap(new(zone()) LStackCheck(context)));
}
}
LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
HEnvironment* outer = current_block_->last_environment();
HConstant* undefined = graph()->GetConstantUndefined();
HEnvironment* inner = outer->CopyForInlining(instr->closure(),
instr->arguments_count(),
instr->function(),
undefined,
instr->call_kind(),
instr->is_construct());
if (instr->arguments_var() != NULL) {
inner->Bind(instr->arguments_var(), graph()->GetArgumentsObject());
}
current_block_->UpdateEnvironment(inner);
chunk_->AddInlinedClosure(instr->closure());
return NULL;
}
LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
LInstruction* pop = NULL;
HEnvironment* env = current_block_->last_environment();
if (instr->arguments_pushed()) {
int argument_count = env->arguments_environment()->parameter_count();
pop = new(zone()) LDrop(argument_count);
argument_count_ -= argument_count;
}
HEnvironment* outer = current_block_->last_environment()->
DiscardInlined(false);
current_block_->UpdateEnvironment(outer);
return pop;
}
LInstruction* LChunkBuilder::DoIn(HIn* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* key = UseOrConstantAtStart(instr->key());
LOperand* object = UseOrConstantAtStart(instr->object());
LIn* result = new(zone()) LIn(context, key, object);
return MarkAsCall(DefineFixed(result, eax), instr);
}
LInstruction* LChunkBuilder::DoForInPrepareMap(HForInPrepareMap* instr) {
LOperand* context = UseFixed(instr->context(), esi);
LOperand* object = UseFixed(instr->enumerable(), eax);
LForInPrepareMap* result = new(zone()) LForInPrepareMap(context, object);
return MarkAsCall(DefineFixed(result, eax), instr, CAN_DEOPTIMIZE_EAGERLY);
}
LInstruction* LChunkBuilder::DoForInCacheArray(HForInCacheArray* instr) {
LOperand* map = UseRegister(instr->map());
return AssignEnvironment(DefineAsRegister(
new(zone()) LForInCacheArray(map)));
}
LInstruction* LChunkBuilder::DoCheckMapValue(HCheckMapValue* instr) {
LOperand* value = UseRegisterAtStart(instr->value());
LOperand* map = UseRegisterAtStart(instr->map());
return AssignEnvironment(new(zone()) LCheckMapValue(value, map));
}
LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
LOperand* object = UseRegister(instr->object());
LOperand* index = UseTempRegister(instr->index());
return DefineSameAsFirst(new(zone()) LLoadFieldByIndex(object, index));
}
} } // namespace v8::internal
#endif // V8_TARGET_ARCH_IA32