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Unified Diff: src/ia32/full-codegen-ia32.cc

Issue 1248443003: Move Full-codegen into its own folder. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: rename define Created 5 years, 5 months ago
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Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
deleted file mode 100644
index 588b04e2b5b282f37c5eb90028e3699d8d98b2fa..0000000000000000000000000000000000000000
--- a/src/ia32/full-codegen-ia32.cc
+++ /dev/null
@@ -1,5346 +0,0 @@
-// Copyright 2012 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"
-
-#if V8_TARGET_ARCH_IA32
-
-#include "src/code-factory.h"
-#include "src/code-stubs.h"
-#include "src/codegen.h"
-#include "src/compiler.h"
-#include "src/debug.h"
-#include "src/full-codegen.h"
-#include "src/ic/ic.h"
-#include "src/parser.h"
-#include "src/scopes.h"
-
-namespace v8 {
-namespace internal {
-
-#define __ ACCESS_MASM(masm_)
-
-
-class JumpPatchSite BASE_EMBEDDED {
- public:
- explicit JumpPatchSite(MacroAssembler* masm) : masm_(masm) {
-#ifdef DEBUG
- info_emitted_ = false;
-#endif
- }
-
- ~JumpPatchSite() {
- DCHECK(patch_site_.is_bound() == info_emitted_);
- }
-
- void EmitJumpIfNotSmi(Register reg,
- Label* target,
- Label::Distance distance = Label::kFar) {
- __ test(reg, Immediate(kSmiTagMask));
- EmitJump(not_carry, target, distance); // Always taken before patched.
- }
-
- void EmitJumpIfSmi(Register reg,
- Label* target,
- Label::Distance distance = Label::kFar) {
- __ test(reg, Immediate(kSmiTagMask));
- EmitJump(carry, target, distance); // Never taken before patched.
- }
-
- void EmitPatchInfo() {
- if (patch_site_.is_bound()) {
- int delta_to_patch_site = masm_->SizeOfCodeGeneratedSince(&patch_site_);
- DCHECK(is_uint8(delta_to_patch_site));
- __ test(eax, Immediate(delta_to_patch_site));
-#ifdef DEBUG
- info_emitted_ = true;
-#endif
- } else {
- __ nop(); // Signals no inlined code.
- }
- }
-
- private:
- // jc will be patched with jz, jnc will become jnz.
- void EmitJump(Condition cc, Label* target, Label::Distance distance) {
- DCHECK(!patch_site_.is_bound() && !info_emitted_);
- DCHECK(cc == carry || cc == not_carry);
- __ bind(&patch_site_);
- __ j(cc, target, distance);
- }
-
- MacroAssembler* masm_;
- Label patch_site_;
-#ifdef DEBUG
- bool info_emitted_;
-#endif
-};
-
-
-// Generate code for a JS function. On entry to the function the receiver
-// and arguments have been pushed on the stack left to right, with the
-// return address on top of them. The actual argument count matches the
-// formal parameter count expected by the function.
-//
-// The live registers are:
-// o edi: the JS function object being called (i.e. ourselves)
-// o esi: our context
-// o ebp: our caller's frame pointer
-// o esp: stack pointer (pointing to return address)
-//
-// The function builds a JS frame. Please see JavaScriptFrameConstants in
-// frames-ia32.h for its layout.
-void FullCodeGenerator::Generate() {
- CompilationInfo* info = info_;
- profiling_counter_ = isolate()->factory()->NewCell(
- Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate()));
- SetFunctionPosition(function());
- Comment cmnt(masm_, "[ function compiled by full code generator");
-
- ProfileEntryHookStub::MaybeCallEntryHook(masm_);
-
-#ifdef DEBUG
- if (strlen(FLAG_stop_at) > 0 &&
- info->function()->name()->IsUtf8EqualTo(CStrVector(FLAG_stop_at))) {
- __ int3();
- }
-#endif
-
- // Sloppy mode functions and builtins need to replace the receiver with the
- // global proxy when called as functions (without an explicit receiver
- // object).
- if (is_sloppy(info->language_mode()) && !info->is_native() &&
- info->MayUseThis()) {
- Label ok;
- // +1 for return address.
- int receiver_offset = (info->scope()->num_parameters() + 1) * kPointerSize;
- __ mov(ecx, Operand(esp, receiver_offset));
-
- __ cmp(ecx, isolate()->factory()->undefined_value());
- __ j(not_equal, &ok, Label::kNear);
-
- __ mov(ecx, GlobalObjectOperand());
- __ mov(ecx, FieldOperand(ecx, GlobalObject::kGlobalProxyOffset));
-
- __ mov(Operand(esp, receiver_offset), ecx);
-
- __ bind(&ok);
- }
-
- // Open a frame scope to indicate that there is a frame on the stack. The
- // MANUAL indicates that the scope shouldn't actually generate code to set up
- // the frame (that is done below).
- FrameScope frame_scope(masm_, StackFrame::MANUAL);
-
- info->set_prologue_offset(masm_->pc_offset());
- __ Prologue(info->IsCodePreAgingActive());
- info->AddNoFrameRange(0, masm_->pc_offset());
-
- { Comment cmnt(masm_, "[ Allocate locals");
- int locals_count = info->scope()->num_stack_slots();
- // Generators allocate locals, if any, in context slots.
- DCHECK(!IsGeneratorFunction(info->function()->kind()) || locals_count == 0);
- if (locals_count == 1) {
- __ push(Immediate(isolate()->factory()->undefined_value()));
- } else if (locals_count > 1) {
- if (locals_count >= 128) {
- Label ok;
- __ mov(ecx, esp);
- __ sub(ecx, Immediate(locals_count * kPointerSize));
- ExternalReference stack_limit =
- ExternalReference::address_of_real_stack_limit(isolate());
- __ cmp(ecx, Operand::StaticVariable(stack_limit));
- __ j(above_equal, &ok, Label::kNear);
- __ InvokeBuiltin(Builtins::STACK_OVERFLOW, CALL_FUNCTION);
- __ bind(&ok);
- }
- __ mov(eax, Immediate(isolate()->factory()->undefined_value()));
- const int kMaxPushes = 32;
- if (locals_count >= kMaxPushes) {
- int loop_iterations = locals_count / kMaxPushes;
- __ mov(ecx, loop_iterations);
- Label loop_header;
- __ bind(&loop_header);
- // Do pushes.
- for (int i = 0; i < kMaxPushes; i++) {
- __ push(eax);
- }
- __ dec(ecx);
- __ j(not_zero, &loop_header, Label::kNear);
- }
- int remaining = locals_count % kMaxPushes;
- // Emit the remaining pushes.
- for (int i = 0; i < remaining; i++) {
- __ push(eax);
- }
- }
- }
-
- bool function_in_register = true;
-
- // Possibly allocate a local context.
- if (info->scope()->num_heap_slots() > 0) {
- Comment cmnt(masm_, "[ Allocate context");
- bool need_write_barrier = true;
- int slots = info->scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS;
- // Argument to NewContext is the function, which is still in edi.
- if (info->scope()->is_script_scope()) {
- __ push(edi);
- __ Push(info->scope()->GetScopeInfo(info->isolate()));
- __ CallRuntime(Runtime::kNewScriptContext, 2);
- } else if (slots <= FastNewContextStub::kMaximumSlots) {
- FastNewContextStub stub(isolate(), slots);
- __ CallStub(&stub);
- // Result of FastNewContextStub is always in new space.
- need_write_barrier = false;
- } else {
- __ push(edi);
- __ CallRuntime(Runtime::kNewFunctionContext, 1);
- }
- function_in_register = false;
- // Context is returned in eax. It replaces the context passed to us.
- // It's saved in the stack and kept live in esi.
- __ mov(esi, eax);
- __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), eax);
-
- // Copy parameters into context if necessary.
- int num_parameters = info->scope()->num_parameters();
- int first_parameter = info->scope()->has_this_declaration() ? -1 : 0;
- for (int i = first_parameter; i < num_parameters; i++) {
- Variable* var = (i == -1) ? scope()->receiver() : scope()->parameter(i);
- if (var->IsContextSlot()) {
- int parameter_offset = StandardFrameConstants::kCallerSPOffset +
- (num_parameters - 1 - i) * kPointerSize;
- // Load parameter from stack.
- __ mov(eax, Operand(ebp, parameter_offset));
- // Store it in the context.
- int context_offset = Context::SlotOffset(var->index());
- __ mov(Operand(esi, context_offset), eax);
- // Update the write barrier. This clobbers eax and ebx.
- if (need_write_barrier) {
- __ RecordWriteContextSlot(esi,
- context_offset,
- eax,
- ebx,
- kDontSaveFPRegs);
- } else if (FLAG_debug_code) {
- Label done;
- __ JumpIfInNewSpace(esi, eax, &done, Label::kNear);
- __ Abort(kExpectedNewSpaceObject);
- __ bind(&done);
- }
- }
- }
- }
-
- // Possibly set up a local binding to the this function which is used in
- // derived constructors with super calls.
- Variable* this_function_var = scope()->this_function_var();
- if (this_function_var != nullptr) {
- Comment cmnt(masm_, "[ This function");
- if (!function_in_register) {
- __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
- // The write barrier clobbers register again, keep is marked as such.
- }
- SetVar(this_function_var, edi, ebx, edx);
- }
-
- Variable* new_target_var = scope()->new_target_var();
- if (new_target_var != nullptr) {
- Comment cmnt(masm_, "[ new.target");
- __ mov(eax, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
- Label non_adaptor_frame;
- __ cmp(Operand(eax, StandardFrameConstants::kContextOffset),
- Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
- __ j(not_equal, &non_adaptor_frame);
- __ mov(eax, Operand(eax, StandardFrameConstants::kCallerFPOffset));
-
- __ bind(&non_adaptor_frame);
- __ cmp(Operand(eax, StandardFrameConstants::kMarkerOffset),
- Immediate(Smi::FromInt(StackFrame::CONSTRUCT)));
-
- Label non_construct_frame, done;
- __ j(not_equal, &non_construct_frame);
-
- // Construct frame
- __ mov(eax,
- Operand(eax, ConstructFrameConstants::kOriginalConstructorOffset));
- __ jmp(&done);
-
- // Non-construct frame
- __ bind(&non_construct_frame);
- __ mov(eax, Immediate(isolate()->factory()->undefined_value()));
-
- __ bind(&done);
- SetVar(new_target_var, eax, ebx, edx);
- }
-
-
- // Possibly allocate RestParameters
- int rest_index;
- Variable* rest_param = scope()->rest_parameter(&rest_index);
- if (rest_param) {
- Comment cmnt(masm_, "[ Allocate rest parameter array");
-
- int num_parameters = info->scope()->num_parameters();
- int offset = num_parameters * kPointerSize;
-
- __ lea(edx,
- Operand(ebp, StandardFrameConstants::kCallerSPOffset + offset));
- __ push(edx);
- __ push(Immediate(Smi::FromInt(num_parameters)));
- __ push(Immediate(Smi::FromInt(rest_index)));
- __ push(Immediate(Smi::FromInt(language_mode())));
-
- RestParamAccessStub stub(isolate());
- __ CallStub(&stub);
-
- SetVar(rest_param, eax, ebx, edx);
- }
-
- Variable* arguments = scope()->arguments();
- if (arguments != NULL) {
- // Function uses arguments object.
- Comment cmnt(masm_, "[ Allocate arguments object");
- if (function_in_register) {
- __ push(edi);
- } else {
- __ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
- }
- // Receiver is just before the parameters on the caller's stack.
- int num_parameters = info->scope()->num_parameters();
- int offset = num_parameters * kPointerSize;
- __ lea(edx,
- Operand(ebp, StandardFrameConstants::kCallerSPOffset + offset));
- __ push(edx);
- __ push(Immediate(Smi::FromInt(num_parameters)));
- // Arguments to ArgumentsAccessStub:
- // function, receiver address, parameter count.
- // The stub will rewrite receiver and parameter count if the previous
- // stack frame was an arguments adapter frame.
- ArgumentsAccessStub::Type type;
- if (is_strict(language_mode()) || !is_simple_parameter_list()) {
- type = ArgumentsAccessStub::NEW_STRICT;
- } else if (function()->has_duplicate_parameters()) {
- type = ArgumentsAccessStub::NEW_SLOPPY_SLOW;
- } else {
- type = ArgumentsAccessStub::NEW_SLOPPY_FAST;
- }
-
- ArgumentsAccessStub stub(isolate(), type);
- __ CallStub(&stub);
-
- SetVar(arguments, eax, ebx, edx);
- }
-
- if (FLAG_trace) {
- __ CallRuntime(Runtime::kTraceEnter, 0);
- }
-
- // Visit the declarations and body unless there is an illegal
- // redeclaration.
- if (scope()->HasIllegalRedeclaration()) {
- Comment cmnt(masm_, "[ Declarations");
- scope()->VisitIllegalRedeclaration(this);
-
- } else {
- PrepareForBailoutForId(BailoutId::FunctionEntry(), NO_REGISTERS);
- { Comment cmnt(masm_, "[ Declarations");
- VisitDeclarations(scope()->declarations());
- }
-
- { Comment cmnt(masm_, "[ Stack check");
- PrepareForBailoutForId(BailoutId::Declarations(), NO_REGISTERS);
- Label ok;
- ExternalReference stack_limit
- = ExternalReference::address_of_stack_limit(isolate());
- __ cmp(esp, Operand::StaticVariable(stack_limit));
- __ j(above_equal, &ok, Label::kNear);
- __ call(isolate()->builtins()->StackCheck(), RelocInfo::CODE_TARGET);
- __ bind(&ok);
- }
-
- { Comment cmnt(masm_, "[ Body");
- DCHECK(loop_depth() == 0);
- VisitStatements(function()->body());
- DCHECK(loop_depth() == 0);
- }
- }
-
- // Always emit a 'return undefined' in case control fell off the end of
- // the body.
- { Comment cmnt(masm_, "[ return <undefined>;");
- __ mov(eax, isolate()->factory()->undefined_value());
- EmitReturnSequence();
- }
-}
-
-
-void FullCodeGenerator::ClearAccumulator() {
- __ Move(eax, Immediate(Smi::FromInt(0)));
-}
-
-
-void FullCodeGenerator::EmitProfilingCounterDecrement(int delta) {
- __ mov(ebx, Immediate(profiling_counter_));
- __ sub(FieldOperand(ebx, Cell::kValueOffset),
- Immediate(Smi::FromInt(delta)));
-}
-
-
-void FullCodeGenerator::EmitProfilingCounterReset() {
- int reset_value = FLAG_interrupt_budget;
- __ mov(ebx, Immediate(profiling_counter_));
- __ mov(FieldOperand(ebx, Cell::kValueOffset),
- Immediate(Smi::FromInt(reset_value)));
-}
-
-
-void FullCodeGenerator::EmitBackEdgeBookkeeping(IterationStatement* stmt,
- Label* back_edge_target) {
- Comment cmnt(masm_, "[ Back edge bookkeeping");
- Label ok;
-
- DCHECK(back_edge_target->is_bound());
- int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target);
- int weight = Min(kMaxBackEdgeWeight,
- Max(1, distance / kCodeSizeMultiplier));
- EmitProfilingCounterDecrement(weight);
- __ j(positive, &ok, Label::kNear);
- __ call(isolate()->builtins()->InterruptCheck(), RelocInfo::CODE_TARGET);
-
- // Record a mapping of this PC offset to the OSR id. This is used to find
- // the AST id from the unoptimized code in order to use it as a key into
- // the deoptimization input data found in the optimized code.
- RecordBackEdge(stmt->OsrEntryId());
-
- EmitProfilingCounterReset();
-
- __ bind(&ok);
- PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);
- // Record a mapping of the OSR id to this PC. This is used if the OSR
- // entry becomes the target of a bailout. We don't expect it to be, but
- // we want it to work if it is.
- PrepareForBailoutForId(stmt->OsrEntryId(), NO_REGISTERS);
-}
-
-
-void FullCodeGenerator::EmitReturnSequence() {
- Comment cmnt(masm_, "[ Return sequence");
- if (return_label_.is_bound()) {
- __ jmp(&return_label_);
- } else {
- // Common return label
- __ bind(&return_label_);
- if (FLAG_trace) {
- __ push(eax);
- __ CallRuntime(Runtime::kTraceExit, 1);
- }
- // Pretend that the exit is a backwards jump to the entry.
- int weight = 1;
- if (info_->ShouldSelfOptimize()) {
- weight = FLAG_interrupt_budget / FLAG_self_opt_count;
- } else {
- int distance = masm_->pc_offset();
- weight = Min(kMaxBackEdgeWeight,
- Max(1, distance / kCodeSizeMultiplier));
- }
- EmitProfilingCounterDecrement(weight);
- Label ok;
- __ j(positive, &ok, Label::kNear);
- __ push(eax);
- __ call(isolate()->builtins()->InterruptCheck(),
- RelocInfo::CODE_TARGET);
- __ pop(eax);
- EmitProfilingCounterReset();
- __ bind(&ok);
-
- SetReturnPosition(function());
- int no_frame_start = masm_->pc_offset();
- __ leave();
-
- int arg_count = info_->scope()->num_parameters() + 1;
- int arguments_bytes = arg_count * kPointerSize;
- __ Ret(arguments_bytes, ecx);
- info_->AddNoFrameRange(no_frame_start, masm_->pc_offset());
- }
-}
-
-
-void FullCodeGenerator::StackValueContext::Plug(Variable* var) const {
- DCHECK(var->IsStackAllocated() || var->IsContextSlot());
- MemOperand operand = codegen()->VarOperand(var, result_register());
- // Memory operands can be pushed directly.
- __ push(operand);
-}
-
-
-void FullCodeGenerator::EffectContext::Plug(Heap::RootListIndex index) const {
- UNREACHABLE(); // Not used on IA32.
-}
-
-
-void FullCodeGenerator::AccumulatorValueContext::Plug(
- Heap::RootListIndex index) const {
- UNREACHABLE(); // Not used on IA32.
-}
-
-
-void FullCodeGenerator::StackValueContext::Plug(
- Heap::RootListIndex index) const {
- UNREACHABLE(); // Not used on IA32.
-}
-
-
-void FullCodeGenerator::TestContext::Plug(Heap::RootListIndex index) const {
- UNREACHABLE(); // Not used on IA32.
-}
-
-
-void FullCodeGenerator::EffectContext::Plug(Handle<Object> lit) const {
-}
-
-
-void FullCodeGenerator::AccumulatorValueContext::Plug(
- Handle<Object> lit) const {
- if (lit->IsSmi()) {
- __ SafeMove(result_register(), Immediate(lit));
- } else {
- __ Move(result_register(), Immediate(lit));
- }
-}
-
-
-void FullCodeGenerator::StackValueContext::Plug(Handle<Object> lit) const {
- if (lit->IsSmi()) {
- __ SafePush(Immediate(lit));
- } else {
- __ push(Immediate(lit));
- }
-}
-
-
-void FullCodeGenerator::TestContext::Plug(Handle<Object> lit) const {
- codegen()->PrepareForBailoutBeforeSplit(condition(),
- true,
- true_label_,
- false_label_);
- DCHECK(!lit->IsUndetectableObject()); // There are no undetectable literals.
- if (lit->IsUndefined() || lit->IsNull() || lit->IsFalse()) {
- if (false_label_ != fall_through_) __ jmp(false_label_);
- } else if (lit->IsTrue() || lit->IsJSObject()) {
- if (true_label_ != fall_through_) __ jmp(true_label_);
- } else if (lit->IsString()) {
- if (String::cast(*lit)->length() == 0) {
- if (false_label_ != fall_through_) __ jmp(false_label_);
- } else {
- if (true_label_ != fall_through_) __ jmp(true_label_);
- }
- } else if (lit->IsSmi()) {
- if (Smi::cast(*lit)->value() == 0) {
- if (false_label_ != fall_through_) __ jmp(false_label_);
- } else {
- if (true_label_ != fall_through_) __ jmp(true_label_);
- }
- } else {
- // For simplicity we always test the accumulator register.
- __ mov(result_register(), lit);
- codegen()->DoTest(this);
- }
-}
-
-
-void FullCodeGenerator::EffectContext::DropAndPlug(int count,
- Register reg) const {
- DCHECK(count > 0);
- __ Drop(count);
-}
-
-
-void FullCodeGenerator::AccumulatorValueContext::DropAndPlug(
- int count,
- Register reg) const {
- DCHECK(count > 0);
- __ Drop(count);
- __ Move(result_register(), reg);
-}
-
-
-void FullCodeGenerator::StackValueContext::DropAndPlug(int count,
- Register reg) const {
- DCHECK(count > 0);
- if (count > 1) __ Drop(count - 1);
- __ mov(Operand(esp, 0), reg);
-}
-
-
-void FullCodeGenerator::TestContext::DropAndPlug(int count,
- Register reg) const {
- DCHECK(count > 0);
- // For simplicity we always test the accumulator register.
- __ Drop(count);
- __ Move(result_register(), reg);
- codegen()->PrepareForBailoutBeforeSplit(condition(), false, NULL, NULL);
- codegen()->DoTest(this);
-}
-
-
-void FullCodeGenerator::EffectContext::Plug(Label* materialize_true,
- Label* materialize_false) const {
- DCHECK(materialize_true == materialize_false);
- __ bind(materialize_true);
-}
-
-
-void FullCodeGenerator::AccumulatorValueContext::Plug(
- Label* materialize_true,
- Label* materialize_false) const {
- Label done;
- __ bind(materialize_true);
- __ mov(result_register(), isolate()->factory()->true_value());
- __ jmp(&done, Label::kNear);
- __ bind(materialize_false);
- __ mov(result_register(), isolate()->factory()->false_value());
- __ bind(&done);
-}
-
-
-void FullCodeGenerator::StackValueContext::Plug(
- Label* materialize_true,
- Label* materialize_false) const {
- Label done;
- __ bind(materialize_true);
- __ push(Immediate(isolate()->factory()->true_value()));
- __ jmp(&done, Label::kNear);
- __ bind(materialize_false);
- __ push(Immediate(isolate()->factory()->false_value()));
- __ bind(&done);
-}
-
-
-void FullCodeGenerator::TestContext::Plug(Label* materialize_true,
- Label* materialize_false) const {
- DCHECK(materialize_true == true_label_);
- DCHECK(materialize_false == false_label_);
-}
-
-
-void FullCodeGenerator::AccumulatorValueContext::Plug(bool flag) const {
- Handle<Object> value = flag
- ? isolate()->factory()->true_value()
- : isolate()->factory()->false_value();
- __ mov(result_register(), value);
-}
-
-
-void FullCodeGenerator::StackValueContext::Plug(bool flag) const {
- Handle<Object> value = flag
- ? isolate()->factory()->true_value()
- : isolate()->factory()->false_value();
- __ push(Immediate(value));
-}
-
-
-void FullCodeGenerator::TestContext::Plug(bool flag) const {
- codegen()->PrepareForBailoutBeforeSplit(condition(),
- true,
- true_label_,
- false_label_);
- if (flag) {
- if (true_label_ != fall_through_) __ jmp(true_label_);
- } else {
- if (false_label_ != fall_through_) __ jmp(false_label_);
- }
-}
-
-
-void FullCodeGenerator::DoTest(Expression* condition,
- Label* if_true,
- Label* if_false,
- Label* fall_through) {
- Handle<Code> ic = ToBooleanStub::GetUninitialized(isolate());
- CallIC(ic, condition->test_id());
- __ test(result_register(), result_register());
- // The stub returns nonzero for true.
- Split(not_zero, if_true, if_false, fall_through);
-}
-
-
-void FullCodeGenerator::Split(Condition cc,
- Label* if_true,
- Label* if_false,
- Label* fall_through) {
- if (if_false == fall_through) {
- __ j(cc, if_true);
- } else if (if_true == fall_through) {
- __ j(NegateCondition(cc), if_false);
- } else {
- __ j(cc, if_true);
- __ jmp(if_false);
- }
-}
-
-
-MemOperand FullCodeGenerator::StackOperand(Variable* var) {
- DCHECK(var->IsStackAllocated());
- // Offset is negative because higher indexes are at lower addresses.
- int offset = -var->index() * kPointerSize;
- // Adjust by a (parameter or local) base offset.
- if (var->IsParameter()) {
- offset += (info_->scope()->num_parameters() + 1) * kPointerSize;
- } else {
- offset += JavaScriptFrameConstants::kLocal0Offset;
- }
- return Operand(ebp, offset);
-}
-
-
-MemOperand FullCodeGenerator::VarOperand(Variable* var, Register scratch) {
- DCHECK(var->IsContextSlot() || var->IsStackAllocated());
- if (var->IsContextSlot()) {
- int context_chain_length = scope()->ContextChainLength(var->scope());
- __ LoadContext(scratch, context_chain_length);
- return ContextOperand(scratch, var->index());
- } else {
- return StackOperand(var);
- }
-}
-
-
-void FullCodeGenerator::GetVar(Register dest, Variable* var) {
- DCHECK(var->IsContextSlot() || var->IsStackAllocated());
- MemOperand location = VarOperand(var, dest);
- __ mov(dest, location);
-}
-
-
-void FullCodeGenerator::SetVar(Variable* var,
- Register src,
- Register scratch0,
- Register scratch1) {
- DCHECK(var->IsContextSlot() || var->IsStackAllocated());
- DCHECK(!scratch0.is(src));
- DCHECK(!scratch0.is(scratch1));
- DCHECK(!scratch1.is(src));
- MemOperand location = VarOperand(var, scratch0);
- __ mov(location, src);
-
- // Emit the write barrier code if the location is in the heap.
- if (var->IsContextSlot()) {
- int offset = Context::SlotOffset(var->index());
- DCHECK(!scratch0.is(esi) && !src.is(esi) && !scratch1.is(esi));
- __ RecordWriteContextSlot(scratch0, offset, src, scratch1, kDontSaveFPRegs);
- }
-}
-
-
-void FullCodeGenerator::PrepareForBailoutBeforeSplit(Expression* expr,
- bool should_normalize,
- Label* if_true,
- Label* if_false) {
- // Only prepare for bailouts before splits if we're in a test
- // context. Otherwise, we let the Visit function deal with the
- // preparation to avoid preparing with the same AST id twice.
- if (!context()->IsTest() || !info_->IsOptimizable()) return;
-
- Label skip;
- if (should_normalize) __ jmp(&skip, Label::kNear);
- PrepareForBailout(expr, TOS_REG);
- if (should_normalize) {
- __ cmp(eax, isolate()->factory()->true_value());
- Split(equal, if_true, if_false, NULL);
- __ bind(&skip);
- }
-}
-
-
-void FullCodeGenerator::EmitDebugCheckDeclarationContext(Variable* variable) {
- // The variable in the declaration always resides in the current context.
- DCHECK_EQ(0, scope()->ContextChainLength(variable->scope()));
- if (generate_debug_code_) {
- // Check that we're not inside a with or catch context.
- __ mov(ebx, FieldOperand(esi, HeapObject::kMapOffset));
- __ cmp(ebx, isolate()->factory()->with_context_map());
- __ Check(not_equal, kDeclarationInWithContext);
- __ cmp(ebx, isolate()->factory()->catch_context_map());
- __ Check(not_equal, kDeclarationInCatchContext);
- }
-}
-
-
-void FullCodeGenerator::VisitVariableDeclaration(
- VariableDeclaration* declaration) {
- // If it was not possible to allocate the variable at compile time, we
- // need to "declare" it at runtime to make sure it actually exists in the
- // local context.
- VariableProxy* proxy = declaration->proxy();
- VariableMode mode = declaration->mode();
- Variable* variable = proxy->var();
- bool hole_init = mode == LET || mode == CONST || mode == CONST_LEGACY;
- switch (variable->location()) {
- case VariableLocation::GLOBAL:
- case VariableLocation::UNALLOCATED:
- globals_->Add(variable->name(), zone());
- globals_->Add(variable->binding_needs_init()
- ? isolate()->factory()->the_hole_value()
- : isolate()->factory()->undefined_value(), zone());
- break;
-
- case VariableLocation::PARAMETER:
- case VariableLocation::LOCAL:
- if (hole_init) {
- Comment cmnt(masm_, "[ VariableDeclaration");
- __ mov(StackOperand(variable),
- Immediate(isolate()->factory()->the_hole_value()));
- }
- break;
-
- case VariableLocation::CONTEXT:
- if (hole_init) {
- Comment cmnt(masm_, "[ VariableDeclaration");
- EmitDebugCheckDeclarationContext(variable);
- __ mov(ContextOperand(esi, variable->index()),
- Immediate(isolate()->factory()->the_hole_value()));
- // No write barrier since the hole value is in old space.
- PrepareForBailoutForId(proxy->id(), NO_REGISTERS);
- }
- break;
-
- case VariableLocation::LOOKUP: {
- Comment cmnt(masm_, "[ VariableDeclaration");
- __ push(esi);
- __ push(Immediate(variable->name()));
- // VariableDeclaration nodes are always introduced in one of four modes.
- DCHECK(IsDeclaredVariableMode(mode));
- PropertyAttributes attr =
- IsImmutableVariableMode(mode) ? READ_ONLY : NONE;
- __ push(Immediate(Smi::FromInt(attr)));
- // Push initial value, if any.
- // Note: For variables we must not push an initial value (such as
- // 'undefined') because we may have a (legal) redeclaration and we
- // must not destroy the current value.
- if (hole_init) {
- __ push(Immediate(isolate()->factory()->the_hole_value()));
- } else {
- __ push(Immediate(Smi::FromInt(0))); // Indicates no initial value.
- }
- __ CallRuntime(Runtime::kDeclareLookupSlot, 4);
- break;
- }
- }
-}
-
-
-void FullCodeGenerator::VisitFunctionDeclaration(
- FunctionDeclaration* declaration) {
- VariableProxy* proxy = declaration->proxy();
- Variable* variable = proxy->var();
- switch (variable->location()) {
- case VariableLocation::GLOBAL:
- case VariableLocation::UNALLOCATED: {
- globals_->Add(variable->name(), zone());
- Handle<SharedFunctionInfo> function =
- Compiler::GetSharedFunctionInfo(declaration->fun(), script(), info_);
- // Check for stack-overflow exception.
- if (function.is_null()) return SetStackOverflow();
- globals_->Add(function, zone());
- break;
- }
-
- case VariableLocation::PARAMETER:
- case VariableLocation::LOCAL: {
- Comment cmnt(masm_, "[ FunctionDeclaration");
- VisitForAccumulatorValue(declaration->fun());
- __ mov(StackOperand(variable), result_register());
- break;
- }
-
- case VariableLocation::CONTEXT: {
- Comment cmnt(masm_, "[ FunctionDeclaration");
- EmitDebugCheckDeclarationContext(variable);
- VisitForAccumulatorValue(declaration->fun());
- __ mov(ContextOperand(esi, variable->index()), result_register());
- // We know that we have written a function, which is not a smi.
- __ RecordWriteContextSlot(esi,
- Context::SlotOffset(variable->index()),
- result_register(),
- ecx,
- kDontSaveFPRegs,
- EMIT_REMEMBERED_SET,
- OMIT_SMI_CHECK);
- PrepareForBailoutForId(proxy->id(), NO_REGISTERS);
- break;
- }
-
- case VariableLocation::LOOKUP: {
- Comment cmnt(masm_, "[ FunctionDeclaration");
- __ push(esi);
- __ push(Immediate(variable->name()));
- __ push(Immediate(Smi::FromInt(NONE)));
- VisitForStackValue(declaration->fun());
- __ CallRuntime(Runtime::kDeclareLookupSlot, 4);
- break;
- }
- }
-}
-
-
-void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) {
- // Call the runtime to declare the globals.
- __ push(esi); // The context is the first argument.
- __ Push(pairs);
- __ Push(Smi::FromInt(DeclareGlobalsFlags()));
- __ CallRuntime(Runtime::kDeclareGlobals, 3);
- // Return value is ignored.
-}
-
-
-void FullCodeGenerator::DeclareModules(Handle<FixedArray> descriptions) {
- // Call the runtime to declare the modules.
- __ Push(descriptions);
- __ CallRuntime(Runtime::kDeclareModules, 1);
- // Return value is ignored.
-}
-
-
-void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
- Comment cmnt(masm_, "[ SwitchStatement");
- Breakable nested_statement(this, stmt);
- SetStatementPosition(stmt);
-
- // Keep the switch value on the stack until a case matches.
- VisitForStackValue(stmt->tag());
- PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);
-
- ZoneList<CaseClause*>* clauses = stmt->cases();
- CaseClause* default_clause = NULL; // Can occur anywhere in the list.
-
- Label next_test; // Recycled for each test.
- // Compile all the tests with branches to their bodies.
- for (int i = 0; i < clauses->length(); i++) {
- CaseClause* clause = clauses->at(i);
- clause->body_target()->Unuse();
-
- // The default is not a test, but remember it as final fall through.
- if (clause->is_default()) {
- default_clause = clause;
- continue;
- }
-
- Comment cmnt(masm_, "[ Case comparison");
- __ bind(&next_test);
- next_test.Unuse();
-
- // Compile the label expression.
- VisitForAccumulatorValue(clause->label());
-
- // Perform the comparison as if via '==='.
- __ mov(edx, Operand(esp, 0)); // Switch value.
- bool inline_smi_code = ShouldInlineSmiCase(Token::EQ_STRICT);
- JumpPatchSite patch_site(masm_);
- if (inline_smi_code) {
- Label slow_case;
- __ mov(ecx, edx);
- __ or_(ecx, eax);
- patch_site.EmitJumpIfNotSmi(ecx, &slow_case, Label::kNear);
-
- __ cmp(edx, eax);
- __ j(not_equal, &next_test);
- __ Drop(1); // Switch value is no longer needed.
- __ jmp(clause->body_target());
- __ bind(&slow_case);
- }
-
- SetExpressionPosition(clause);
- Handle<Code> ic = CodeFactory::CompareIC(isolate(), Token::EQ_STRICT,
- strength(language_mode())).code();
- CallIC(ic, clause->CompareId());
- patch_site.EmitPatchInfo();
-
- Label skip;
- __ jmp(&skip, Label::kNear);
- PrepareForBailout(clause, TOS_REG);
- __ cmp(eax, isolate()->factory()->true_value());
- __ j(not_equal, &next_test);
- __ Drop(1);
- __ jmp(clause->body_target());
- __ bind(&skip);
-
- __ test(eax, eax);
- __ j(not_equal, &next_test);
- __ Drop(1); // Switch value is no longer needed.
- __ jmp(clause->body_target());
- }
-
- // Discard the test value and jump to the default if present, otherwise to
- // the end of the statement.
- __ bind(&next_test);
- __ Drop(1); // Switch value is no longer needed.
- if (default_clause == NULL) {
- __ jmp(nested_statement.break_label());
- } else {
- __ jmp(default_clause->body_target());
- }
-
- // Compile all the case bodies.
- for (int i = 0; i < clauses->length(); i++) {
- Comment cmnt(masm_, "[ Case body");
- CaseClause* clause = clauses->at(i);
- __ bind(clause->body_target());
- PrepareForBailoutForId(clause->EntryId(), NO_REGISTERS);
- VisitStatements(clause->statements());
- }
-
- __ bind(nested_statement.break_label());
- PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS);
-}
-
-
-void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
- Comment cmnt(masm_, "[ ForInStatement");
- SetStatementPosition(stmt, SKIP_BREAK);
-
- FeedbackVectorSlot slot = stmt->ForInFeedbackSlot();
-
- Label loop, exit;
- ForIn loop_statement(this, stmt);
- increment_loop_depth();
-
- // Get the object to enumerate over. If the object is null or undefined, skip
- // over the loop. See ECMA-262 version 5, section 12.6.4.
- SetExpressionAsStatementPosition(stmt->enumerable());
- VisitForAccumulatorValue(stmt->enumerable());
- __ cmp(eax, isolate()->factory()->undefined_value());
- __ j(equal, &exit);
- __ cmp(eax, isolate()->factory()->null_value());
- __ j(equal, &exit);
-
- PrepareForBailoutForId(stmt->PrepareId(), TOS_REG);
-
- // Convert the object to a JS object.
- Label convert, done_convert;
- __ JumpIfSmi(eax, &convert, Label::kNear);
- __ CmpObjectType(eax, FIRST_SPEC_OBJECT_TYPE, ecx);
- __ j(above_equal, &done_convert, Label::kNear);
- __ bind(&convert);
- __ push(eax);
- __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
- __ bind(&done_convert);
- PrepareForBailoutForId(stmt->ToObjectId(), TOS_REG);
- __ push(eax);
-
- // Check for proxies.
- Label call_runtime, use_cache, fixed_array;
- STATIC_ASSERT(FIRST_JS_PROXY_TYPE == FIRST_SPEC_OBJECT_TYPE);
- __ CmpObjectType(eax, LAST_JS_PROXY_TYPE, ecx);
- __ j(below_equal, &call_runtime);
-
- // Check cache validity in generated code. This is a fast case for
- // the JSObject::IsSimpleEnum cache validity checks. If we cannot
- // guarantee cache validity, call the runtime system to check cache
- // validity or get the property names in a fixed array.
- __ CheckEnumCache(&call_runtime);
-
- __ mov(eax, FieldOperand(eax, HeapObject::kMapOffset));
- __ jmp(&use_cache, Label::kNear);
-
- // Get the set of properties to enumerate.
- __ bind(&call_runtime);
- __ push(eax);
- __ CallRuntime(Runtime::kGetPropertyNamesFast, 1);
- PrepareForBailoutForId(stmt->EnumId(), TOS_REG);
- __ cmp(FieldOperand(eax, HeapObject::kMapOffset),
- isolate()->factory()->meta_map());
- __ j(not_equal, &fixed_array);
-
-
- // We got a map in register eax. Get the enumeration cache from it.
- Label no_descriptors;
- __ bind(&use_cache);
-
- __ EnumLength(edx, eax);
- __ cmp(edx, Immediate(Smi::FromInt(0)));
- __ j(equal, &no_descriptors);
-
- __ LoadInstanceDescriptors(eax, ecx);
- __ mov(ecx, FieldOperand(ecx, DescriptorArray::kEnumCacheOffset));
- __ mov(ecx, FieldOperand(ecx, DescriptorArray::kEnumCacheBridgeCacheOffset));
-
- // Set up the four remaining stack slots.
- __ push(eax); // Map.
- __ push(ecx); // Enumeration cache.
- __ push(edx); // Number of valid entries for the map in the enum cache.
- __ push(Immediate(Smi::FromInt(0))); // Initial index.
- __ jmp(&loop);
-
- __ bind(&no_descriptors);
- __ add(esp, Immediate(kPointerSize));
- __ jmp(&exit);
-
- // We got a fixed array in register eax. Iterate through that.
- Label non_proxy;
- __ bind(&fixed_array);
-
- // No need for a write barrier, we are storing a Smi in the feedback vector.
- __ LoadHeapObject(ebx, FeedbackVector());
- int vector_index = FeedbackVector()->GetIndex(slot);
- __ mov(FieldOperand(ebx, FixedArray::OffsetOfElementAt(vector_index)),
- Immediate(TypeFeedbackVector::MegamorphicSentinel(isolate())));
-
- __ mov(ebx, Immediate(Smi::FromInt(1))); // Smi indicates slow check
- __ mov(ecx, Operand(esp, 0 * kPointerSize)); // Get enumerated object
- STATIC_ASSERT(FIRST_JS_PROXY_TYPE == FIRST_SPEC_OBJECT_TYPE);
- __ CmpObjectType(ecx, LAST_JS_PROXY_TYPE, ecx);
- __ j(above, &non_proxy);
- __ Move(ebx, Immediate(Smi::FromInt(0))); // Zero indicates proxy
- __ bind(&non_proxy);
- __ push(ebx); // Smi
- __ push(eax); // Array
- __ mov(eax, FieldOperand(eax, FixedArray::kLengthOffset));
- __ push(eax); // Fixed array length (as smi).
- __ push(Immediate(Smi::FromInt(0))); // Initial index.
-
- // Generate code for doing the condition check.
- PrepareForBailoutForId(stmt->BodyId(), NO_REGISTERS);
- __ bind(&loop);
- SetExpressionAsStatementPosition(stmt->each());
-
- __ mov(eax, Operand(esp, 0 * kPointerSize)); // Get the current index.
- __ cmp(eax, Operand(esp, 1 * kPointerSize)); // Compare to the array length.
- __ j(above_equal, loop_statement.break_label());
-
- // Get the current entry of the array into register ebx.
- __ mov(ebx, Operand(esp, 2 * kPointerSize));
- __ mov(ebx, FieldOperand(ebx, eax, times_2, FixedArray::kHeaderSize));
-
- // Get the expected map from the stack or a smi in the
- // permanent slow case into register edx.
- __ mov(edx, Operand(esp, 3 * kPointerSize));
-
- // Check if the expected map still matches that of the enumerable.
- // If not, we may have to filter the key.
- Label update_each;
- __ mov(ecx, Operand(esp, 4 * kPointerSize));
- __ cmp(edx, FieldOperand(ecx, HeapObject::kMapOffset));
- __ j(equal, &update_each, Label::kNear);
-
- // For proxies, no filtering is done.
- // TODO(rossberg): What if only a prototype is a proxy? Not specified yet.
- DCHECK(Smi::FromInt(0) == 0);
- __ test(edx, edx);
- __ j(zero, &update_each);
-
- // Convert the entry to a string or null if it isn't a property
- // anymore. If the property has been removed while iterating, we
- // just skip it.
- __ push(ecx); // Enumerable.
- __ push(ebx); // Current entry.
- __ CallRuntime(Runtime::kForInFilter, 2);
- PrepareForBailoutForId(stmt->FilterId(), TOS_REG);
- __ cmp(eax, isolate()->factory()->undefined_value());
- __ j(equal, loop_statement.continue_label());
- __ mov(ebx, eax);
-
- // Update the 'each' property or variable from the possibly filtered
- // entry in register ebx.
- __ bind(&update_each);
- __ mov(result_register(), ebx);
- // Perform the assignment as if via '='.
- { EffectContext context(this);
- EmitAssignment(stmt->each(), stmt->EachFeedbackSlot());
- PrepareForBailoutForId(stmt->AssignmentId(), NO_REGISTERS);
- }
-
- // Generate code for the body of the loop.
- Visit(stmt->body());
-
- // Generate code for going to the next element by incrementing the
- // index (smi) stored on top of the stack.
- __ bind(loop_statement.continue_label());
- __ add(Operand(esp, 0 * kPointerSize), Immediate(Smi::FromInt(1)));
-
- EmitBackEdgeBookkeeping(stmt, &loop);
- __ jmp(&loop);
-
- // Remove the pointers stored on the stack.
- __ bind(loop_statement.break_label());
- __ add(esp, Immediate(5 * kPointerSize));
-
- // Exit and decrement the loop depth.
- PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS);
- __ bind(&exit);
- decrement_loop_depth();
-}
-
-
-void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
- bool pretenure) {
- // Use the fast case closure allocation code that allocates in new
- // space for nested functions that don't need literals cloning. If
- // we're running with the --always-opt or the --prepare-always-opt
- // flag, we need to use the runtime function so that the new function
- // we are creating here gets a chance to have its code optimized and
- // doesn't just get a copy of the existing unoptimized code.
- if (!FLAG_always_opt &&
- !FLAG_prepare_always_opt &&
- !pretenure &&
- scope()->is_function_scope() &&
- info->num_literals() == 0) {
- FastNewClosureStub stub(isolate(), info->language_mode(), info->kind());
- __ mov(ebx, Immediate(info));
- __ CallStub(&stub);
- } else {
- __ push(esi);
- __ push(Immediate(info));
- __ push(Immediate(pretenure
- ? isolate()->factory()->true_value()
- : isolate()->factory()->false_value()));
- __ CallRuntime(Runtime::kNewClosure, 3);
- }
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitSetHomeObjectIfNeeded(Expression* initializer,
- int offset,
- FeedbackVectorICSlot slot) {
- if (NeedsHomeObject(initializer)) {
- __ mov(StoreDescriptor::ReceiverRegister(), Operand(esp, 0));
- __ mov(StoreDescriptor::NameRegister(),
- Immediate(isolate()->factory()->home_object_symbol()));
- __ mov(StoreDescriptor::ValueRegister(),
- Operand(esp, offset * kPointerSize));
- if (FLAG_vector_stores) EmitLoadStoreICSlot(slot);
- CallStoreIC();
- }
-}
-
-
-void FullCodeGenerator::EmitLoadGlobalCheckExtensions(VariableProxy* proxy,
- TypeofMode typeof_mode,
- Label* slow) {
- Register context = esi;
- Register temp = edx;
-
- Scope* s = scope();
- while (s != NULL) {
- if (s->num_heap_slots() > 0) {
- if (s->calls_sloppy_eval()) {
- // Check that extension is NULL.
- __ cmp(ContextOperand(context, Context::EXTENSION_INDEX),
- Immediate(0));
- __ j(not_equal, slow);
- }
- // Load next context in chain.
- __ mov(temp, ContextOperand(context, Context::PREVIOUS_INDEX));
- // Walk the rest of the chain without clobbering esi.
- context = temp;
- }
- // If no outer scope calls eval, we do not need to check more
- // context extensions. If we have reached an eval scope, we check
- // all extensions from this point.
- if (!s->outer_scope_calls_sloppy_eval() || s->is_eval_scope()) break;
- s = s->outer_scope();
- }
-
- if (s != NULL && s->is_eval_scope()) {
- // Loop up the context chain. There is no frame effect so it is
- // safe to use raw labels here.
- Label next, fast;
- if (!context.is(temp)) {
- __ mov(temp, context);
- }
- __ bind(&next);
- // Terminate at native context.
- __ cmp(FieldOperand(temp, HeapObject::kMapOffset),
- Immediate(isolate()->factory()->native_context_map()));
- __ j(equal, &fast, Label::kNear);
- // Check that extension is NULL.
- __ cmp(ContextOperand(temp, Context::EXTENSION_INDEX), Immediate(0));
- __ j(not_equal, slow);
- // Load next context in chain.
- __ mov(temp, ContextOperand(temp, Context::PREVIOUS_INDEX));
- __ jmp(&next);
- __ bind(&fast);
- }
-
- // All extension objects were empty and it is safe to use a normal global
- // load machinery.
- EmitGlobalVariableLoad(proxy, typeof_mode);
-}
-
-
-MemOperand FullCodeGenerator::ContextSlotOperandCheckExtensions(Variable* var,
- Label* slow) {
- DCHECK(var->IsContextSlot());
- Register context = esi;
- Register temp = ebx;
-
- for (Scope* s = scope(); s != var->scope(); s = s->outer_scope()) {
- if (s->num_heap_slots() > 0) {
- if (s->calls_sloppy_eval()) {
- // Check that extension is NULL.
- __ cmp(ContextOperand(context, Context::EXTENSION_INDEX),
- Immediate(0));
- __ j(not_equal, slow);
- }
- __ mov(temp, ContextOperand(context, Context::PREVIOUS_INDEX));
- // Walk the rest of the chain without clobbering esi.
- context = temp;
- }
- }
- // Check that last extension is NULL.
- __ cmp(ContextOperand(context, Context::EXTENSION_INDEX), Immediate(0));
- __ j(not_equal, slow);
-
- // This function is used only for loads, not stores, so it's safe to
- // return an esi-based operand (the write barrier cannot be allowed to
- // destroy the esi register).
- return ContextOperand(context, var->index());
-}
-
-
-void FullCodeGenerator::EmitDynamicLookupFastCase(VariableProxy* proxy,
- TypeofMode typeof_mode,
- Label* slow, Label* done) {
- // Generate fast-case code for variables that might be shadowed by
- // eval-introduced variables. Eval is used a lot without
- // introducing variables. In those cases, we do not want to
- // perform a runtime call for all variables in the scope
- // containing the eval.
- Variable* var = proxy->var();
- if (var->mode() == DYNAMIC_GLOBAL) {
- EmitLoadGlobalCheckExtensions(proxy, typeof_mode, slow);
- __ jmp(done);
- } else if (var->mode() == DYNAMIC_LOCAL) {
- Variable* local = var->local_if_not_shadowed();
- __ mov(eax, ContextSlotOperandCheckExtensions(local, slow));
- if (local->mode() == LET || local->mode() == CONST ||
- local->mode() == CONST_LEGACY) {
- __ cmp(eax, isolate()->factory()->the_hole_value());
- __ j(not_equal, done);
- if (local->mode() == CONST_LEGACY) {
- __ mov(eax, isolate()->factory()->undefined_value());
- } else { // LET || CONST
- __ push(Immediate(var->name()));
- __ CallRuntime(Runtime::kThrowReferenceError, 1);
- }
- }
- __ jmp(done);
- }
-}
-
-
-void FullCodeGenerator::EmitGlobalVariableLoad(VariableProxy* proxy,
- TypeofMode typeof_mode) {
- Variable* var = proxy->var();
- DCHECK(var->IsUnallocatedOrGlobalSlot() ||
- (var->IsLookupSlot() && var->mode() == DYNAMIC_GLOBAL));
- if (var->IsGlobalSlot()) {
- DCHECK(var->index() > 0);
- DCHECK(var->IsStaticGlobalObjectProperty());
- // Each var occupies two slots in the context: for reads and writes.
- int slot_index = var->index();
- int depth = scope()->ContextChainLength(var->scope());
- __ mov(LoadGlobalViaContextDescriptor::DepthRegister(),
- Immediate(Smi::FromInt(depth)));
- __ mov(LoadGlobalViaContextDescriptor::SlotRegister(),
- Immediate(Smi::FromInt(slot_index)));
- __ mov(LoadGlobalViaContextDescriptor::NameRegister(), var->name());
- LoadGlobalViaContextStub stub(isolate(), depth);
- __ CallStub(&stub);
-
- } else {
- __ mov(LoadDescriptor::ReceiverRegister(), GlobalObjectOperand());
- __ mov(LoadDescriptor::NameRegister(), var->name());
- __ mov(LoadDescriptor::SlotRegister(),
- Immediate(SmiFromSlot(proxy->VariableFeedbackSlot())));
- CallLoadIC(typeof_mode);
- }
-}
-
-
-void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy,
- TypeofMode typeof_mode) {
- SetExpressionPosition(proxy);
- PrepareForBailoutForId(proxy->BeforeId(), NO_REGISTERS);
- Variable* var = proxy->var();
-
- // Three cases: global variables, lookup variables, and all other types of
- // variables.
- switch (var->location()) {
- case VariableLocation::GLOBAL:
- case VariableLocation::UNALLOCATED: {
- Comment cmnt(masm_, "[ Global variable");
- EmitGlobalVariableLoad(proxy, typeof_mode);
- context()->Plug(eax);
- break;
- }
-
- case VariableLocation::PARAMETER:
- case VariableLocation::LOCAL:
- case VariableLocation::CONTEXT: {
- DCHECK_EQ(NOT_INSIDE_TYPEOF, typeof_mode);
- Comment cmnt(masm_, var->IsContextSlot() ? "[ Context variable"
- : "[ Stack variable");
- if (var->binding_needs_init()) {
- // var->scope() may be NULL when the proxy is located in eval code and
- // refers to a potential outside binding. Currently those bindings are
- // always looked up dynamically, i.e. in that case
- // var->location() == LOOKUP.
- // always holds.
- DCHECK(var->scope() != NULL);
-
- // Check if the binding really needs an initialization check. The check
- // can be skipped in the following situation: we have a LET or CONST
- // binding in harmony mode, both the Variable and the VariableProxy have
- // the same declaration scope (i.e. they are both in global code, in the
- // same function or in the same eval code) and the VariableProxy is in
- // the source physically located after the initializer of the variable.
- //
- // We cannot skip any initialization checks for CONST in non-harmony
- // mode because const variables may be declared but never initialized:
- // if (false) { const x; }; var y = x;
- //
- // The condition on the declaration scopes is a conservative check for
- // nested functions that access a binding and are called before the
- // binding is initialized:
- // function() { f(); let x = 1; function f() { x = 2; } }
- //
- bool skip_init_check;
- if (var->scope()->DeclarationScope() != scope()->DeclarationScope()) {
- skip_init_check = false;
- } else if (var->is_this()) {
- CHECK(info_->function() != nullptr &&
- (info_->function()->kind() & kSubclassConstructor) != 0);
- // TODO(dslomov): implement 'this' hole check elimination.
- skip_init_check = false;
- } else {
- // Check that we always have valid source position.
- DCHECK(var->initializer_position() != RelocInfo::kNoPosition);
- DCHECK(proxy->position() != RelocInfo::kNoPosition);
- skip_init_check = var->mode() != CONST_LEGACY &&
- var->initializer_position() < proxy->position();
- }
-
- if (!skip_init_check) {
- // Let and const need a read barrier.
- Label done;
- GetVar(eax, var);
- __ cmp(eax, isolate()->factory()->the_hole_value());
- __ j(not_equal, &done, Label::kNear);
- if (var->mode() == LET || var->mode() == CONST) {
- // Throw a reference error when using an uninitialized let/const
- // binding in harmony mode.
- __ push(Immediate(var->name()));
- __ CallRuntime(Runtime::kThrowReferenceError, 1);
- } else {
- // Uninitalized const bindings outside of harmony mode are unholed.
- DCHECK(var->mode() == CONST_LEGACY);
- __ mov(eax, isolate()->factory()->undefined_value());
- }
- __ bind(&done);
- context()->Plug(eax);
- break;
- }
- }
- context()->Plug(var);
- break;
- }
-
- case VariableLocation::LOOKUP: {
- Comment cmnt(masm_, "[ Lookup variable");
- Label done, slow;
- // Generate code for loading from variables potentially shadowed
- // by eval-introduced variables.
- EmitDynamicLookupFastCase(proxy, typeof_mode, &slow, &done);
- __ bind(&slow);
- __ push(esi); // Context.
- __ push(Immediate(var->name()));
- Runtime::FunctionId function_id =
- typeof_mode == NOT_INSIDE_TYPEOF
- ? Runtime::kLoadLookupSlot
- : Runtime::kLoadLookupSlotNoReferenceError;
- __ CallRuntime(function_id, 2);
- __ bind(&done);
- context()->Plug(eax);
- break;
- }
- }
-}
-
-
-void FullCodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) {
- Comment cmnt(masm_, "[ RegExpLiteral");
- Label materialized;
- // Registers will be used as follows:
- // edi = JS function.
- // ecx = literals array.
- // ebx = regexp literal.
- // eax = regexp literal clone.
- __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
- __ mov(ecx, FieldOperand(edi, JSFunction::kLiteralsOffset));
- int literal_offset =
- FixedArray::kHeaderSize + expr->literal_index() * kPointerSize;
- __ mov(ebx, FieldOperand(ecx, literal_offset));
- __ cmp(ebx, isolate()->factory()->undefined_value());
- __ j(not_equal, &materialized, Label::kNear);
-
- // Create regexp literal using runtime function
- // Result will be in eax.
- __ push(ecx);
- __ push(Immediate(Smi::FromInt(expr->literal_index())));
- __ push(Immediate(expr->pattern()));
- __ push(Immediate(expr->flags()));
- __ CallRuntime(Runtime::kMaterializeRegExpLiteral, 4);
- __ mov(ebx, eax);
-
- __ bind(&materialized);
- int size = JSRegExp::kSize + JSRegExp::kInObjectFieldCount * kPointerSize;
- Label allocated, runtime_allocate;
- __ Allocate(size, eax, ecx, edx, &runtime_allocate, TAG_OBJECT);
- __ jmp(&allocated);
-
- __ bind(&runtime_allocate);
- __ push(ebx);
- __ push(Immediate(Smi::FromInt(size)));
- __ CallRuntime(Runtime::kAllocateInNewSpace, 1);
- __ pop(ebx);
-
- __ bind(&allocated);
- // Copy the content into the newly allocated memory.
- // (Unroll copy loop once for better throughput).
- for (int i = 0; i < size - kPointerSize; i += 2 * kPointerSize) {
- __ mov(edx, FieldOperand(ebx, i));
- __ mov(ecx, FieldOperand(ebx, i + kPointerSize));
- __ mov(FieldOperand(eax, i), edx);
- __ mov(FieldOperand(eax, i + kPointerSize), ecx);
- }
- if ((size % (2 * kPointerSize)) != 0) {
- __ mov(edx, FieldOperand(ebx, size - kPointerSize));
- __ mov(FieldOperand(eax, size - kPointerSize), edx);
- }
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitAccessor(Expression* expression) {
- if (expression == NULL) {
- __ push(Immediate(isolate()->factory()->null_value()));
- } else {
- VisitForStackValue(expression);
- }
-}
-
-
-void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
- Comment cmnt(masm_, "[ ObjectLiteral");
-
- Handle<FixedArray> constant_properties = expr->constant_properties();
- int flags = expr->ComputeFlags();
- // If any of the keys would store to the elements array, then we shouldn't
- // allow it.
- if (MustCreateObjectLiteralWithRuntime(expr)) {
- __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
- __ push(FieldOperand(edi, JSFunction::kLiteralsOffset));
- __ push(Immediate(Smi::FromInt(expr->literal_index())));
- __ push(Immediate(constant_properties));
- __ push(Immediate(Smi::FromInt(flags)));
- __ CallRuntime(Runtime::kCreateObjectLiteral, 4);
- } else {
- __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
- __ mov(eax, FieldOperand(edi, JSFunction::kLiteralsOffset));
- __ mov(ebx, Immediate(Smi::FromInt(expr->literal_index())));
- __ mov(ecx, Immediate(constant_properties));
- __ mov(edx, Immediate(Smi::FromInt(flags)));
- FastCloneShallowObjectStub stub(isolate(), expr->properties_count());
- __ CallStub(&stub);
- }
- PrepareForBailoutForId(expr->CreateLiteralId(), TOS_REG);
-
- // If result_saved is true the result is on top of the stack. If
- // result_saved is false the result is in eax.
- bool result_saved = false;
-
- AccessorTable accessor_table(zone());
- int property_index = 0;
- // store_slot_index points to the vector IC slot for the next store IC used.
- // ObjectLiteral::ComputeFeedbackRequirements controls the allocation of slots
- // and must be updated if the number of store ICs emitted here changes.
- int store_slot_index = 0;
- for (; property_index < expr->properties()->length(); property_index++) {
- ObjectLiteral::Property* property = expr->properties()->at(property_index);
- if (property->is_computed_name()) break;
- if (property->IsCompileTimeValue()) continue;
-
- Literal* key = property->key()->AsLiteral();
- Expression* value = property->value();
- if (!result_saved) {
- __ push(eax); // Save result on the stack
- result_saved = true;
- }
- switch (property->kind()) {
- case ObjectLiteral::Property::CONSTANT:
- UNREACHABLE();
- case ObjectLiteral::Property::MATERIALIZED_LITERAL:
- DCHECK(!CompileTimeValue::IsCompileTimeValue(value));
- // Fall through.
- case ObjectLiteral::Property::COMPUTED:
- // It is safe to use [[Put]] here because the boilerplate already
- // contains computed properties with an uninitialized value.
- if (key->value()->IsInternalizedString()) {
- if (property->emit_store()) {
- VisitForAccumulatorValue(value);
- DCHECK(StoreDescriptor::ValueRegister().is(eax));
- __ mov(StoreDescriptor::NameRegister(), Immediate(key->value()));
- __ mov(StoreDescriptor::ReceiverRegister(), Operand(esp, 0));
- if (FLAG_vector_stores) {
- EmitLoadStoreICSlot(expr->GetNthSlot(store_slot_index++));
- CallStoreIC();
- } else {
- CallStoreIC(key->LiteralFeedbackId());
- }
- PrepareForBailoutForId(key->id(), NO_REGISTERS);
-
- if (NeedsHomeObject(value)) {
- __ mov(StoreDescriptor::ReceiverRegister(), eax);
- __ mov(StoreDescriptor::NameRegister(),
- Immediate(isolate()->factory()->home_object_symbol()));
- __ mov(StoreDescriptor::ValueRegister(), Operand(esp, 0));
- if (FLAG_vector_stores) {
- EmitLoadStoreICSlot(expr->GetNthSlot(store_slot_index++));
- }
- CallStoreIC();
- }
- } else {
- VisitForEffect(value);
- }
- break;
- }
- __ push(Operand(esp, 0)); // Duplicate receiver.
- VisitForStackValue(key);
- VisitForStackValue(value);
- if (property->emit_store()) {
- EmitSetHomeObjectIfNeeded(
- value, 2, expr->SlotForHomeObject(value, &store_slot_index));
- __ push(Immediate(Smi::FromInt(SLOPPY))); // Language mode
- __ CallRuntime(Runtime::kSetProperty, 4);
- } else {
- __ Drop(3);
- }
- break;
- case ObjectLiteral::Property::PROTOTYPE:
- __ push(Operand(esp, 0)); // Duplicate receiver.
- VisitForStackValue(value);
- DCHECK(property->emit_store());
- __ CallRuntime(Runtime::kInternalSetPrototype, 2);
- break;
- case ObjectLiteral::Property::GETTER:
- if (property->emit_store()) {
- accessor_table.lookup(key)->second->getter = value;
- }
- break;
- case ObjectLiteral::Property::SETTER:
- if (property->emit_store()) {
- accessor_table.lookup(key)->second->setter = value;
- }
- break;
- }
- }
-
- // Emit code to define accessors, using only a single call to the runtime for
- // each pair of corresponding getters and setters.
- for (AccessorTable::Iterator it = accessor_table.begin();
- it != accessor_table.end();
- ++it) {
- __ push(Operand(esp, 0)); // Duplicate receiver.
- VisitForStackValue(it->first);
- EmitAccessor(it->second->getter);
- EmitSetHomeObjectIfNeeded(
- it->second->getter, 2,
- expr->SlotForHomeObject(it->second->getter, &store_slot_index));
-
- EmitAccessor(it->second->setter);
- EmitSetHomeObjectIfNeeded(
- it->second->setter, 3,
- expr->SlotForHomeObject(it->second->setter, &store_slot_index));
-
- __ push(Immediate(Smi::FromInt(NONE)));
- __ CallRuntime(Runtime::kDefineAccessorPropertyUnchecked, 5);
- }
-
- // Object literals have two parts. The "static" part on the left contains no
- // computed property names, and so we can compute its map ahead of time; see
- // runtime.cc::CreateObjectLiteralBoilerplate. The second "dynamic" part
- // starts with the first computed property name, and continues with all
- // properties to its right. All the code from above initializes the static
- // component of the object literal, and arranges for the map of the result to
- // reflect the static order in which the keys appear. For the dynamic
- // properties, we compile them into a series of "SetOwnProperty" runtime
- // calls. This will preserve insertion order.
- for (; property_index < expr->properties()->length(); property_index++) {
- ObjectLiteral::Property* property = expr->properties()->at(property_index);
-
- Expression* value = property->value();
- if (!result_saved) {
- __ push(eax); // Save result on the stack
- result_saved = true;
- }
-
- __ push(Operand(esp, 0)); // Duplicate receiver.
-
- if (property->kind() == ObjectLiteral::Property::PROTOTYPE) {
- DCHECK(!property->is_computed_name());
- VisitForStackValue(value);
- DCHECK(property->emit_store());
- __ CallRuntime(Runtime::kInternalSetPrototype, 2);
- } else {
- EmitPropertyKey(property, expr->GetIdForProperty(property_index));
- VisitForStackValue(value);
- EmitSetHomeObjectIfNeeded(
- value, 2, expr->SlotForHomeObject(value, &store_slot_index));
-
- switch (property->kind()) {
- case ObjectLiteral::Property::CONSTANT:
- case ObjectLiteral::Property::MATERIALIZED_LITERAL:
- case ObjectLiteral::Property::COMPUTED:
- if (property->emit_store()) {
- __ push(Immediate(Smi::FromInt(NONE)));
- __ CallRuntime(Runtime::kDefineDataPropertyUnchecked, 4);
- } else {
- __ Drop(3);
- }
- break;
-
- case ObjectLiteral::Property::PROTOTYPE:
- UNREACHABLE();
- break;
-
- case ObjectLiteral::Property::GETTER:
- __ push(Immediate(Smi::FromInt(NONE)));
- __ CallRuntime(Runtime::kDefineGetterPropertyUnchecked, 4);
- break;
-
- case ObjectLiteral::Property::SETTER:
- __ push(Immediate(Smi::FromInt(NONE)));
- __ CallRuntime(Runtime::kDefineSetterPropertyUnchecked, 4);
- break;
- }
- }
- }
-
- if (expr->has_function()) {
- DCHECK(result_saved);
- __ push(Operand(esp, 0));
- __ CallRuntime(Runtime::kToFastProperties, 1);
- }
-
- if (result_saved) {
- context()->PlugTOS();
- } else {
- context()->Plug(eax);
- }
-
- // Verify that compilation exactly consumed the number of store ic slots that
- // the ObjectLiteral node had to offer.
- DCHECK(!FLAG_vector_stores || store_slot_index == expr->slot_count());
-}
-
-
-void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
- Comment cmnt(masm_, "[ ArrayLiteral");
-
- expr->BuildConstantElements(isolate());
- Handle<FixedArray> constant_elements = expr->constant_elements();
- bool has_constant_fast_elements =
- IsFastObjectElementsKind(expr->constant_elements_kind());
-
- AllocationSiteMode allocation_site_mode = TRACK_ALLOCATION_SITE;
- if (has_constant_fast_elements && !FLAG_allocation_site_pretenuring) {
- // If the only customer of allocation sites is transitioning, then
- // we can turn it off if we don't have anywhere else to transition to.
- allocation_site_mode = DONT_TRACK_ALLOCATION_SITE;
- }
-
- if (MustCreateArrayLiteralWithRuntime(expr)) {
- __ mov(ebx, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
- __ push(FieldOperand(ebx, JSFunction::kLiteralsOffset));
- __ push(Immediate(Smi::FromInt(expr->literal_index())));
- __ push(Immediate(constant_elements));
- __ push(Immediate(Smi::FromInt(expr->ComputeFlags())));
- __ CallRuntime(Runtime::kCreateArrayLiteral, 4);
- } else {
- __ mov(ebx, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
- __ mov(eax, FieldOperand(ebx, JSFunction::kLiteralsOffset));
- __ mov(ebx, Immediate(Smi::FromInt(expr->literal_index())));
- __ mov(ecx, Immediate(constant_elements));
- FastCloneShallowArrayStub stub(isolate(), allocation_site_mode);
- __ CallStub(&stub);
- }
- PrepareForBailoutForId(expr->CreateLiteralId(), TOS_REG);
-
- bool result_saved = false; // Is the result saved to the stack?
- ZoneList<Expression*>* subexprs = expr->values();
- int length = subexprs->length();
-
- // Emit code to evaluate all the non-constant subexpressions and to store
- // them into the newly cloned array.
- int array_index = 0;
- for (; array_index < length; array_index++) {
- Expression* subexpr = subexprs->at(array_index);
- if (subexpr->IsSpread()) break;
-
- // If the subexpression is a literal or a simple materialized literal it
- // is already set in the cloned array.
- if (CompileTimeValue::IsCompileTimeValue(subexpr)) continue;
-
- if (!result_saved) {
- __ push(eax); // array literal.
- __ push(Immediate(Smi::FromInt(expr->literal_index())));
- result_saved = true;
- }
- VisitForAccumulatorValue(subexpr);
-
- if (has_constant_fast_elements) {
- // Fast-case array literal with ElementsKind of FAST_*_ELEMENTS, they
- // cannot transition and don't need to call the runtime stub.
- int offset = FixedArray::kHeaderSize + (array_index * kPointerSize);
- __ mov(ebx, Operand(esp, kPointerSize)); // Copy of array literal.
- __ mov(ebx, FieldOperand(ebx, JSObject::kElementsOffset));
- // Store the subexpression value in the array's elements.
- __ mov(FieldOperand(ebx, offset), result_register());
- // Update the write barrier for the array store.
- __ RecordWriteField(ebx, offset, result_register(), ecx,
- kDontSaveFPRegs,
- EMIT_REMEMBERED_SET,
- INLINE_SMI_CHECK);
- } else {
- // Store the subexpression value in the array's elements.
- __ mov(ecx, Immediate(Smi::FromInt(array_index)));
- StoreArrayLiteralElementStub stub(isolate());
- __ CallStub(&stub);
- }
-
- PrepareForBailoutForId(expr->GetIdForElement(array_index), NO_REGISTERS);
- }
-
- // In case the array literal contains spread expressions it has two parts. The
- // first part is the "static" array which has a literal index is handled
- // above. The second part is the part after the first spread expression
- // (inclusive) and these elements gets appended to the array. Note that the
- // number elements an iterable produces is unknown ahead of time.
- if (array_index < length && result_saved) {
- __ Drop(1); // literal index
- __ Pop(eax);
- result_saved = false;
- }
- for (; array_index < length; array_index++) {
- Expression* subexpr = subexprs->at(array_index);
-
- __ Push(eax);
- if (subexpr->IsSpread()) {
- VisitForStackValue(subexpr->AsSpread()->expression());
- __ InvokeBuiltin(Builtins::CONCAT_ITERABLE_TO_ARRAY, CALL_FUNCTION);
- } else {
- VisitForStackValue(subexpr);
- __ CallRuntime(Runtime::kAppendElement, 2);
- }
-
- PrepareForBailoutForId(expr->GetIdForElement(array_index), NO_REGISTERS);
- }
-
- if (result_saved) {
- __ Drop(1); // literal index
- context()->PlugTOS();
- } else {
- context()->Plug(eax);
- }
-}
-
-
-void FullCodeGenerator::VisitAssignment(Assignment* expr) {
- DCHECK(expr->target()->IsValidReferenceExpressionOrThis());
-
- Comment cmnt(masm_, "[ Assignment");
- SetExpressionPosition(expr, INSERT_BREAK);
-
- Property* property = expr->target()->AsProperty();
- LhsKind assign_type = Property::GetAssignType(property);
-
- // Evaluate LHS expression.
- switch (assign_type) {
- case VARIABLE:
- // Nothing to do here.
- break;
- case NAMED_SUPER_PROPERTY:
- VisitForStackValue(
- property->obj()->AsSuperPropertyReference()->this_var());
- VisitForAccumulatorValue(
- property->obj()->AsSuperPropertyReference()->home_object());
- __ push(result_register());
- if (expr->is_compound()) {
- __ push(MemOperand(esp, kPointerSize));
- __ push(result_register());
- }
- break;
- case NAMED_PROPERTY:
- if (expr->is_compound()) {
- // We need the receiver both on the stack and in the register.
- VisitForStackValue(property->obj());
- __ mov(LoadDescriptor::ReceiverRegister(), Operand(esp, 0));
- } else {
- VisitForStackValue(property->obj());
- }
- break;
- case KEYED_SUPER_PROPERTY:
- VisitForStackValue(
- property->obj()->AsSuperPropertyReference()->this_var());
- VisitForStackValue(
- property->obj()->AsSuperPropertyReference()->home_object());
- VisitForAccumulatorValue(property->key());
- __ Push(result_register());
- if (expr->is_compound()) {
- __ push(MemOperand(esp, 2 * kPointerSize));
- __ push(MemOperand(esp, 2 * kPointerSize));
- __ push(result_register());
- }
- break;
- case KEYED_PROPERTY: {
- if (expr->is_compound()) {
- VisitForStackValue(property->obj());
- VisitForStackValue(property->key());
- __ mov(LoadDescriptor::ReceiverRegister(), Operand(esp, kPointerSize));
- __ mov(LoadDescriptor::NameRegister(), Operand(esp, 0));
- } else {
- VisitForStackValue(property->obj());
- VisitForStackValue(property->key());
- }
- break;
- }
- }
-
- // For compound assignments we need another deoptimization point after the
- // variable/property load.
- if (expr->is_compound()) {
- AccumulatorValueContext result_context(this);
- { AccumulatorValueContext left_operand_context(this);
- switch (assign_type) {
- case VARIABLE:
- EmitVariableLoad(expr->target()->AsVariableProxy());
- PrepareForBailout(expr->target(), TOS_REG);
- break;
- case NAMED_SUPER_PROPERTY:
- EmitNamedSuperPropertyLoad(property);
- PrepareForBailoutForId(property->LoadId(), TOS_REG);
- break;
- case NAMED_PROPERTY:
- EmitNamedPropertyLoad(property);
- PrepareForBailoutForId(property->LoadId(), TOS_REG);
- break;
- case KEYED_SUPER_PROPERTY:
- EmitKeyedSuperPropertyLoad(property);
- PrepareForBailoutForId(property->LoadId(), TOS_REG);
- break;
- case KEYED_PROPERTY:
- EmitKeyedPropertyLoad(property);
- PrepareForBailoutForId(property->LoadId(), TOS_REG);
- break;
- }
- }
-
- Token::Value op = expr->binary_op();
- __ push(eax); // Left operand goes on the stack.
- VisitForAccumulatorValue(expr->value());
-
- if (ShouldInlineSmiCase(op)) {
- EmitInlineSmiBinaryOp(expr->binary_operation(),
- op,
- expr->target(),
- expr->value());
- } else {
- EmitBinaryOp(expr->binary_operation(), op);
- }
-
- // Deoptimization point in case the binary operation may have side effects.
- PrepareForBailout(expr->binary_operation(), TOS_REG);
- } else {
- VisitForAccumulatorValue(expr->value());
- }
-
- SetExpressionPosition(expr);
-
- // Store the value.
- switch (assign_type) {
- case VARIABLE:
- EmitVariableAssignment(expr->target()->AsVariableProxy()->var(),
- expr->op(), expr->AssignmentSlot());
- PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
- context()->Plug(eax);
- break;
- case NAMED_PROPERTY:
- EmitNamedPropertyAssignment(expr);
- break;
- case NAMED_SUPER_PROPERTY:
- EmitNamedSuperPropertyStore(property);
- context()->Plug(result_register());
- break;
- case KEYED_SUPER_PROPERTY:
- EmitKeyedSuperPropertyStore(property);
- context()->Plug(result_register());
- break;
- case KEYED_PROPERTY:
- EmitKeyedPropertyAssignment(expr);
- break;
- }
-}
-
-
-void FullCodeGenerator::VisitYield(Yield* expr) {
- Comment cmnt(masm_, "[ Yield");
- SetExpressionPosition(expr);
-
- // Evaluate yielded value first; the initial iterator definition depends on
- // this. It stays on the stack while we update the iterator.
- VisitForStackValue(expr->expression());
-
- switch (expr->yield_kind()) {
- case Yield::kSuspend:
- // Pop value from top-of-stack slot; box result into result register.
- EmitCreateIteratorResult(false);
- __ push(result_register());
- // Fall through.
- case Yield::kInitial: {
- Label suspend, continuation, post_runtime, resume;
-
- __ jmp(&suspend);
- __ bind(&continuation);
- __ RecordGeneratorContinuation();
- __ jmp(&resume);
-
- __ bind(&suspend);
- VisitForAccumulatorValue(expr->generator_object());
- DCHECK(continuation.pos() > 0 && Smi::IsValid(continuation.pos()));
- __ mov(FieldOperand(eax, JSGeneratorObject::kContinuationOffset),
- Immediate(Smi::FromInt(continuation.pos())));
- __ mov(FieldOperand(eax, JSGeneratorObject::kContextOffset), esi);
- __ mov(ecx, esi);
- __ RecordWriteField(eax, JSGeneratorObject::kContextOffset, ecx, edx,
- kDontSaveFPRegs);
- __ lea(ebx, Operand(ebp, StandardFrameConstants::kExpressionsOffset));
- __ cmp(esp, ebx);
- __ j(equal, &post_runtime);
- __ push(eax); // generator object
- __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 1);
- __ mov(context_register(),
- Operand(ebp, StandardFrameConstants::kContextOffset));
- __ bind(&post_runtime);
- __ pop(result_register());
- EmitReturnSequence();
-
- __ bind(&resume);
- context()->Plug(result_register());
- break;
- }
-
- case Yield::kFinal: {
- VisitForAccumulatorValue(expr->generator_object());
- __ mov(FieldOperand(result_register(),
- JSGeneratorObject::kContinuationOffset),
- Immediate(Smi::FromInt(JSGeneratorObject::kGeneratorClosed)));
- // Pop value from top-of-stack slot, box result into result register.
- EmitCreateIteratorResult(true);
- EmitUnwindBeforeReturn();
- EmitReturnSequence();
- break;
- }
-
- case Yield::kDelegating: {
- VisitForStackValue(expr->generator_object());
-
- // Initial stack layout is as follows:
- // [sp + 1 * kPointerSize] iter
- // [sp + 0 * kPointerSize] g
-
- Label l_catch, l_try, l_suspend, l_continuation, l_resume;
- Label l_next, l_call, l_loop;
- Register load_receiver = LoadDescriptor::ReceiverRegister();
- Register load_name = LoadDescriptor::NameRegister();
-
- // Initial send value is undefined.
- __ mov(eax, isolate()->factory()->undefined_value());
- __ jmp(&l_next);
-
- // catch (e) { receiver = iter; f = 'throw'; arg = e; goto l_call; }
- __ bind(&l_catch);
- __ mov(load_name, isolate()->factory()->throw_string()); // "throw"
- __ push(load_name); // "throw"
- __ push(Operand(esp, 2 * kPointerSize)); // iter
- __ push(eax); // exception
- __ jmp(&l_call);
-
- // try { received = %yield result }
- // Shuffle the received result above a try handler and yield it without
- // re-boxing.
- __ bind(&l_try);
- __ pop(eax); // result
- int handler_index = NewHandlerTableEntry();
- EnterTryBlock(handler_index, &l_catch);
- const int try_block_size = TryCatch::kElementCount * kPointerSize;
- __ push(eax); // result
-
- __ jmp(&l_suspend);
- __ bind(&l_continuation);
- __ RecordGeneratorContinuation();
- __ jmp(&l_resume);
-
- __ bind(&l_suspend);
- const int generator_object_depth = kPointerSize + try_block_size;
- __ mov(eax, Operand(esp, generator_object_depth));
- __ push(eax); // g
- __ push(Immediate(Smi::FromInt(handler_index))); // handler-index
- DCHECK(l_continuation.pos() > 0 && Smi::IsValid(l_continuation.pos()));
- __ mov(FieldOperand(eax, JSGeneratorObject::kContinuationOffset),
- Immediate(Smi::FromInt(l_continuation.pos())));
- __ mov(FieldOperand(eax, JSGeneratorObject::kContextOffset), esi);
- __ mov(ecx, esi);
- __ RecordWriteField(eax, JSGeneratorObject::kContextOffset, ecx, edx,
- kDontSaveFPRegs);
- __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 2);
- __ mov(context_register(),
- Operand(ebp, StandardFrameConstants::kContextOffset));
- __ pop(eax); // result
- EmitReturnSequence();
- __ bind(&l_resume); // received in eax
- ExitTryBlock(handler_index);
-
- // receiver = iter; f = iter.next; arg = received;
- __ bind(&l_next);
-
- __ mov(load_name, isolate()->factory()->next_string());
- __ push(load_name); // "next"
- __ push(Operand(esp, 2 * kPointerSize)); // iter
- __ push(eax); // received
-
- // result = receiver[f](arg);
- __ bind(&l_call);
- __ mov(load_receiver, Operand(esp, kPointerSize));
- __ mov(LoadDescriptor::SlotRegister(),
- Immediate(SmiFromSlot(expr->KeyedLoadFeedbackSlot())));
- Handle<Code> ic = CodeFactory::KeyedLoadIC(isolate(), SLOPPY).code();
- CallIC(ic, TypeFeedbackId::None());
- __ mov(edi, eax);
- __ mov(Operand(esp, 2 * kPointerSize), edi);
- SetCallPosition(expr, 1);
- CallFunctionStub stub(isolate(), 1, CALL_AS_METHOD);
- __ CallStub(&stub);
-
- __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
- __ Drop(1); // The function is still on the stack; drop it.
-
- // if (!result.done) goto l_try;
- __ bind(&l_loop);
- __ push(eax); // save result
- __ Move(load_receiver, eax); // result
- __ mov(load_name,
- isolate()->factory()->done_string()); // "done"
- __ mov(LoadDescriptor::SlotRegister(),
- Immediate(SmiFromSlot(expr->DoneFeedbackSlot())));
- CallLoadIC(NOT_INSIDE_TYPEOF); // result.done in eax
- Handle<Code> bool_ic = ToBooleanStub::GetUninitialized(isolate());
- CallIC(bool_ic);
- __ test(eax, eax);
- __ j(zero, &l_try);
-
- // result.value
- __ pop(load_receiver); // result
- __ mov(load_name,
- isolate()->factory()->value_string()); // "value"
- __ mov(LoadDescriptor::SlotRegister(),
- Immediate(SmiFromSlot(expr->ValueFeedbackSlot())));
- CallLoadIC(NOT_INSIDE_TYPEOF); // result.value in eax
- context()->DropAndPlug(2, eax); // drop iter and g
- break;
- }
- }
-}
-
-
-void FullCodeGenerator::EmitGeneratorResume(Expression *generator,
- Expression *value,
- JSGeneratorObject::ResumeMode resume_mode) {
- // The value stays in eax, and is ultimately read by the resumed generator, as
- // if CallRuntime(Runtime::kSuspendJSGeneratorObject) returned it. Or it
- // is read to throw the value when the resumed generator is already closed.
- // ebx will hold the generator object until the activation has been resumed.
- VisitForStackValue(generator);
- VisitForAccumulatorValue(value);
- __ pop(ebx);
-
- // Load suspended function and context.
- __ mov(esi, FieldOperand(ebx, JSGeneratorObject::kContextOffset));
- __ mov(edi, FieldOperand(ebx, JSGeneratorObject::kFunctionOffset));
-
- // Push receiver.
- __ push(FieldOperand(ebx, JSGeneratorObject::kReceiverOffset));
-
- // Push holes for arguments to generator function.
- __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
- __ mov(edx,
- FieldOperand(edx, SharedFunctionInfo::kFormalParameterCountOffset));
- __ mov(ecx, isolate()->factory()->the_hole_value());
- Label push_argument_holes, push_frame;
- __ bind(&push_argument_holes);
- __ sub(edx, Immediate(Smi::FromInt(1)));
- __ j(carry, &push_frame);
- __ push(ecx);
- __ jmp(&push_argument_holes);
-
- // Enter a new JavaScript frame, and initialize its slots as they were when
- // the generator was suspended.
- Label resume_frame, done;
- __ bind(&push_frame);
- __ call(&resume_frame);
- __ jmp(&done);
- __ bind(&resume_frame);
- __ push(ebp); // Caller's frame pointer.
- __ mov(ebp, esp);
- __ push(esi); // Callee's context.
- __ push(edi); // Callee's JS Function.
-
- // Load the operand stack size.
- __ mov(edx, FieldOperand(ebx, JSGeneratorObject::kOperandStackOffset));
- __ mov(edx, FieldOperand(edx, FixedArray::kLengthOffset));
- __ SmiUntag(edx);
-
- // If we are sending a value and there is no operand stack, we can jump back
- // in directly.
- if (resume_mode == JSGeneratorObject::NEXT) {
- Label slow_resume;
- __ cmp(edx, Immediate(0));
- __ j(not_zero, &slow_resume);
- __ mov(edx, FieldOperand(edi, JSFunction::kCodeEntryOffset));
- __ mov(ecx, FieldOperand(ebx, JSGeneratorObject::kContinuationOffset));
- __ SmiUntag(ecx);
- __ add(edx, ecx);
- __ mov(FieldOperand(ebx, JSGeneratorObject::kContinuationOffset),
- Immediate(Smi::FromInt(JSGeneratorObject::kGeneratorExecuting)));
- __ jmp(edx);
- __ bind(&slow_resume);
- }
-
- // Otherwise, we push holes for the operand stack and call the runtime to fix
- // up the stack and the handlers.
- Label push_operand_holes, call_resume;
- __ bind(&push_operand_holes);
- __ sub(edx, Immediate(1));
- __ j(carry, &call_resume);
- __ push(ecx);
- __ jmp(&push_operand_holes);
- __ bind(&call_resume);
- __ push(ebx);
- __ push(result_register());
- __ Push(Smi::FromInt(resume_mode));
- __ CallRuntime(Runtime::kResumeJSGeneratorObject, 3);
- // Not reached: the runtime call returns elsewhere.
- __ Abort(kGeneratorFailedToResume);
-
- __ bind(&done);
- context()->Plug(result_register());
-}
-
-
-void FullCodeGenerator::EmitCreateIteratorResult(bool done) {
- Label gc_required;
- Label allocated;
-
- const int instance_size = 5 * kPointerSize;
- DCHECK_EQ(isolate()->native_context()->iterator_result_map()->instance_size(),
- instance_size);
-
- __ Allocate(instance_size, eax, ecx, edx, &gc_required, TAG_OBJECT);
- __ jmp(&allocated);
-
- __ bind(&gc_required);
- __ Push(Smi::FromInt(instance_size));
- __ CallRuntime(Runtime::kAllocateInNewSpace, 1);
- __ mov(context_register(),
- Operand(ebp, StandardFrameConstants::kContextOffset));
-
- __ bind(&allocated);
- __ mov(ebx, Operand(esi, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX)));
- __ mov(ebx, FieldOperand(ebx, GlobalObject::kNativeContextOffset));
- __ mov(ebx, ContextOperand(ebx, Context::ITERATOR_RESULT_MAP_INDEX));
- __ pop(ecx);
- __ mov(edx, isolate()->factory()->ToBoolean(done));
- __ mov(FieldOperand(eax, HeapObject::kMapOffset), ebx);
- __ mov(FieldOperand(eax, JSObject::kPropertiesOffset),
- isolate()->factory()->empty_fixed_array());
- __ mov(FieldOperand(eax, JSObject::kElementsOffset),
- isolate()->factory()->empty_fixed_array());
- __ mov(FieldOperand(eax, JSGeneratorObject::kResultValuePropertyOffset), ecx);
- __ mov(FieldOperand(eax, JSGeneratorObject::kResultDonePropertyOffset), edx);
-
- // Only the value field needs a write barrier, as the other values are in the
- // root set.
- __ RecordWriteField(eax, JSGeneratorObject::kResultValuePropertyOffset,
- ecx, edx, kDontSaveFPRegs);
-}
-
-
-void FullCodeGenerator::EmitNamedPropertyLoad(Property* prop) {
- SetExpressionPosition(prop);
- Literal* key = prop->key()->AsLiteral();
- DCHECK(!key->value()->IsSmi());
- DCHECK(!prop->IsSuperAccess());
-
- __ mov(LoadDescriptor::NameRegister(), Immediate(key->value()));
- __ mov(LoadDescriptor::SlotRegister(),
- Immediate(SmiFromSlot(prop->PropertyFeedbackSlot())));
- CallLoadIC(NOT_INSIDE_TYPEOF, language_mode());
-}
-
-
-void FullCodeGenerator::EmitNamedSuperPropertyLoad(Property* prop) {
- // Stack: receiver, home_object.
- SetExpressionPosition(prop);
- Literal* key = prop->key()->AsLiteral();
- DCHECK(!key->value()->IsSmi());
- DCHECK(prop->IsSuperAccess());
-
- __ push(Immediate(key->value()));
- __ push(Immediate(Smi::FromInt(language_mode())));
- __ CallRuntime(Runtime::kLoadFromSuper, 4);
-}
-
-
-void FullCodeGenerator::EmitKeyedPropertyLoad(Property* prop) {
- SetExpressionPosition(prop);
- Handle<Code> ic = CodeFactory::KeyedLoadIC(isolate(), language_mode()).code();
- __ mov(LoadDescriptor::SlotRegister(),
- Immediate(SmiFromSlot(prop->PropertyFeedbackSlot())));
- CallIC(ic);
-}
-
-
-void FullCodeGenerator::EmitKeyedSuperPropertyLoad(Property* prop) {
- // Stack: receiver, home_object, key.
- SetExpressionPosition(prop);
- __ push(Immediate(Smi::FromInt(language_mode())));
- __ CallRuntime(Runtime::kLoadKeyedFromSuper, 4);
-}
-
-
-void FullCodeGenerator::EmitInlineSmiBinaryOp(BinaryOperation* expr,
- Token::Value op,
- Expression* left,
- Expression* right) {
- // Do combined smi check of the operands. Left operand is on the
- // stack. Right operand is in eax.
- Label smi_case, done, stub_call;
- __ pop(edx);
- __ mov(ecx, eax);
- __ or_(eax, edx);
- JumpPatchSite patch_site(masm_);
- patch_site.EmitJumpIfSmi(eax, &smi_case, Label::kNear);
-
- __ bind(&stub_call);
- __ mov(eax, ecx);
- Handle<Code> code =
- CodeFactory::BinaryOpIC(isolate(), op, strength(language_mode())).code();
- CallIC(code, expr->BinaryOperationFeedbackId());
- patch_site.EmitPatchInfo();
- __ jmp(&done, Label::kNear);
-
- // Smi case.
- __ bind(&smi_case);
- __ mov(eax, edx); // Copy left operand in case of a stub call.
-
- switch (op) {
- case Token::SAR:
- __ SmiUntag(ecx);
- __ sar_cl(eax); // No checks of result necessary
- __ and_(eax, Immediate(~kSmiTagMask));
- break;
- case Token::SHL: {
- Label result_ok;
- __ SmiUntag(eax);
- __ SmiUntag(ecx);
- __ shl_cl(eax);
- // Check that the *signed* result fits in a smi.
- __ cmp(eax, 0xc0000000);
- __ j(positive, &result_ok);
- __ SmiTag(ecx);
- __ jmp(&stub_call);
- __ bind(&result_ok);
- __ SmiTag(eax);
- break;
- }
- case Token::SHR: {
- Label result_ok;
- __ SmiUntag(eax);
- __ SmiUntag(ecx);
- __ shr_cl(eax);
- __ test(eax, Immediate(0xc0000000));
- __ j(zero, &result_ok);
- __ SmiTag(ecx);
- __ jmp(&stub_call);
- __ bind(&result_ok);
- __ SmiTag(eax);
- break;
- }
- case Token::ADD:
- __ add(eax, ecx);
- __ j(overflow, &stub_call);
- break;
- case Token::SUB:
- __ sub(eax, ecx);
- __ j(overflow, &stub_call);
- break;
- case Token::MUL: {
- __ SmiUntag(eax);
- __ imul(eax, ecx);
- __ j(overflow, &stub_call);
- __ test(eax, eax);
- __ j(not_zero, &done, Label::kNear);
- __ mov(ebx, edx);
- __ or_(ebx, ecx);
- __ j(negative, &stub_call);
- break;
- }
- case Token::BIT_OR:
- __ or_(eax, ecx);
- break;
- case Token::BIT_AND:
- __ and_(eax, ecx);
- break;
- case Token::BIT_XOR:
- __ xor_(eax, ecx);
- break;
- default:
- UNREACHABLE();
- }
-
- __ bind(&done);
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit,
- int* used_store_slots) {
- // Constructor is in eax.
- DCHECK(lit != NULL);
- __ push(eax);
-
- // No access check is needed here since the constructor is created by the
- // class literal.
- Register scratch = ebx;
- __ mov(scratch, FieldOperand(eax, JSFunction::kPrototypeOrInitialMapOffset));
- __ Push(scratch);
-
- for (int i = 0; i < lit->properties()->length(); i++) {
- ObjectLiteral::Property* property = lit->properties()->at(i);
- Expression* value = property->value();
-
- if (property->is_static()) {
- __ push(Operand(esp, kPointerSize)); // constructor
- } else {
- __ push(Operand(esp, 0)); // prototype
- }
- EmitPropertyKey(property, lit->GetIdForProperty(i));
-
- // The static prototype property is read only. We handle the non computed
- // property name case in the parser. Since this is the only case where we
- // need to check for an own read only property we special case this so we do
- // not need to do this for every property.
- if (property->is_static() && property->is_computed_name()) {
- __ CallRuntime(Runtime::kThrowIfStaticPrototype, 1);
- __ push(eax);
- }
-
- VisitForStackValue(value);
- EmitSetHomeObjectIfNeeded(value, 2,
- lit->SlotForHomeObject(value, used_store_slots));
-
- switch (property->kind()) {
- case ObjectLiteral::Property::CONSTANT:
- case ObjectLiteral::Property::MATERIALIZED_LITERAL:
- case ObjectLiteral::Property::PROTOTYPE:
- UNREACHABLE();
- case ObjectLiteral::Property::COMPUTED:
- __ CallRuntime(Runtime::kDefineClassMethod, 3);
- break;
-
- case ObjectLiteral::Property::GETTER:
- __ push(Immediate(Smi::FromInt(DONT_ENUM)));
- __ CallRuntime(Runtime::kDefineGetterPropertyUnchecked, 4);
- break;
-
- case ObjectLiteral::Property::SETTER:
- __ push(Immediate(Smi::FromInt(DONT_ENUM)));
- __ CallRuntime(Runtime::kDefineSetterPropertyUnchecked, 4);
- break;
- }
- }
-
- // prototype
- __ CallRuntime(Runtime::kToFastProperties, 1);
-
- // constructor
- __ CallRuntime(Runtime::kToFastProperties, 1);
-
- if (is_strong(language_mode())) {
- __ mov(scratch,
- FieldOperand(eax, JSFunction::kPrototypeOrInitialMapOffset));
- __ push(eax);
- __ Push(scratch);
- // TODO(conradw): It would be more efficient to define the properties with
- // the right attributes the first time round.
- // Freeze the prototype.
- __ CallRuntime(Runtime::kObjectFreeze, 1);
- // Freeze the constructor.
- __ CallRuntime(Runtime::kObjectFreeze, 1);
- }
-}
-
-
-void FullCodeGenerator::EmitBinaryOp(BinaryOperation* expr, Token::Value op) {
- __ pop(edx);
- Handle<Code> code =
- CodeFactory::BinaryOpIC(isolate(), op, strength(language_mode())).code();
- JumpPatchSite patch_site(masm_); // unbound, signals no inlined smi code.
- CallIC(code, expr->BinaryOperationFeedbackId());
- patch_site.EmitPatchInfo();
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitAssignment(Expression* expr,
- FeedbackVectorICSlot slot) {
- DCHECK(expr->IsValidReferenceExpressionOrThis());
-
- Property* prop = expr->AsProperty();
- LhsKind assign_type = Property::GetAssignType(prop);
-
- switch (assign_type) {
- case VARIABLE: {
- Variable* var = expr->AsVariableProxy()->var();
- EffectContext context(this);
- EmitVariableAssignment(var, Token::ASSIGN, slot);
- break;
- }
- case NAMED_PROPERTY: {
- __ push(eax); // Preserve value.
- VisitForAccumulatorValue(prop->obj());
- __ Move(StoreDescriptor::ReceiverRegister(), eax);
- __ pop(StoreDescriptor::ValueRegister()); // Restore value.
- __ mov(StoreDescriptor::NameRegister(),
- prop->key()->AsLiteral()->value());
- if (FLAG_vector_stores) EmitLoadStoreICSlot(slot);
- CallStoreIC();
- break;
- }
- case NAMED_SUPER_PROPERTY: {
- __ push(eax);
- VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var());
- VisitForAccumulatorValue(
- prop->obj()->AsSuperPropertyReference()->home_object());
- // stack: value, this; eax: home_object
- Register scratch = ecx;
- Register scratch2 = edx;
- __ mov(scratch, result_register()); // home_object
- __ mov(eax, MemOperand(esp, kPointerSize)); // value
- __ mov(scratch2, MemOperand(esp, 0)); // this
- __ mov(MemOperand(esp, kPointerSize), scratch2); // this
- __ mov(MemOperand(esp, 0), scratch); // home_object
- // stack: this, home_object. eax: value
- EmitNamedSuperPropertyStore(prop);
- break;
- }
- case KEYED_SUPER_PROPERTY: {
- __ push(eax);
- VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var());
- VisitForStackValue(
- prop->obj()->AsSuperPropertyReference()->home_object());
- VisitForAccumulatorValue(prop->key());
- Register scratch = ecx;
- Register scratch2 = edx;
- __ mov(scratch2, MemOperand(esp, 2 * kPointerSize)); // value
- // stack: value, this, home_object; eax: key, edx: value
- __ mov(scratch, MemOperand(esp, kPointerSize)); // this
- __ mov(MemOperand(esp, 2 * kPointerSize), scratch);
- __ mov(scratch, MemOperand(esp, 0)); // home_object
- __ mov(MemOperand(esp, kPointerSize), scratch);
- __ mov(MemOperand(esp, 0), eax);
- __ mov(eax, scratch2);
- // stack: this, home_object, key; eax: value.
- EmitKeyedSuperPropertyStore(prop);
- break;
- }
- case KEYED_PROPERTY: {
- __ push(eax); // Preserve value.
- VisitForStackValue(prop->obj());
- VisitForAccumulatorValue(prop->key());
- __ Move(StoreDescriptor::NameRegister(), eax);
- __ pop(StoreDescriptor::ReceiverRegister()); // Receiver.
- __ pop(StoreDescriptor::ValueRegister()); // Restore value.
- if (FLAG_vector_stores) EmitLoadStoreICSlot(slot);
- Handle<Code> ic =
- CodeFactory::KeyedStoreIC(isolate(), language_mode()).code();
- CallIC(ic);
- break;
- }
- }
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitStoreToStackLocalOrContextSlot(
- Variable* var, MemOperand location) {
- __ mov(location, eax);
- if (var->IsContextSlot()) {
- __ mov(edx, eax);
- int offset = Context::SlotOffset(var->index());
- __ RecordWriteContextSlot(ecx, offset, edx, ebx, kDontSaveFPRegs);
- }
-}
-
-
-void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op,
- FeedbackVectorICSlot slot) {
- if (var->IsUnallocated()) {
- // Global var, const, or let.
- __ mov(StoreDescriptor::NameRegister(), var->name());
- __ mov(StoreDescriptor::ReceiverRegister(), GlobalObjectOperand());
- if (FLAG_vector_stores) EmitLoadStoreICSlot(slot);
- CallStoreIC();
-
- } else if (var->IsGlobalSlot()) {
- // Global var, const, or let.
- DCHECK(var->index() > 0);
- DCHECK(var->IsStaticGlobalObjectProperty());
- // Each var occupies two slots in the context: for reads and writes.
- int slot_index = var->index() + 1;
- int depth = scope()->ContextChainLength(var->scope());
- __ mov(StoreGlobalViaContextDescriptor::DepthRegister(),
- Immediate(Smi::FromInt(depth)));
- __ mov(StoreGlobalViaContextDescriptor::SlotRegister(),
- Immediate(Smi::FromInt(slot_index)));
- __ mov(StoreGlobalViaContextDescriptor::NameRegister(), var->name());
- DCHECK(StoreGlobalViaContextDescriptor::ValueRegister().is(eax));
- StoreGlobalViaContextStub stub(isolate(), depth, language_mode());
- __ CallStub(&stub);
-
- } else if (var->mode() == LET && op != Token::INIT_LET) {
- // Non-initializing assignment to let variable needs a write barrier.
- DCHECK(!var->IsLookupSlot());
- DCHECK(var->IsStackAllocated() || var->IsContextSlot());
- Label assign;
- MemOperand location = VarOperand(var, ecx);
- __ mov(edx, location);
- __ cmp(edx, isolate()->factory()->the_hole_value());
- __ j(not_equal, &assign, Label::kNear);
- __ push(Immediate(var->name()));
- __ CallRuntime(Runtime::kThrowReferenceError, 1);
- __ bind(&assign);
- EmitStoreToStackLocalOrContextSlot(var, location);
-
- } else if (var->mode() == CONST && op != Token::INIT_CONST) {
- // Assignment to const variable needs a write barrier.
- DCHECK(!var->IsLookupSlot());
- DCHECK(var->IsStackAllocated() || var->IsContextSlot());
- Label const_error;
- MemOperand location = VarOperand(var, ecx);
- __ mov(edx, location);
- __ cmp(edx, isolate()->factory()->the_hole_value());
- __ j(not_equal, &const_error, Label::kNear);
- __ push(Immediate(var->name()));
- __ CallRuntime(Runtime::kThrowReferenceError, 1);
- __ bind(&const_error);
- __ CallRuntime(Runtime::kThrowConstAssignError, 0);
-
- } else if (var->is_this() && op == Token::INIT_CONST) {
- // Initializing assignment to const {this} needs a write barrier.
- DCHECK(var->IsStackAllocated() || var->IsContextSlot());
- Label uninitialized_this;
- MemOperand location = VarOperand(var, ecx);
- __ mov(edx, location);
- __ cmp(edx, isolate()->factory()->the_hole_value());
- __ j(equal, &uninitialized_this);
- __ push(Immediate(var->name()));
- __ CallRuntime(Runtime::kThrowReferenceError, 1);
- __ bind(&uninitialized_this);
- EmitStoreToStackLocalOrContextSlot(var, location);
-
- } else if (!var->is_const_mode() || op == Token::INIT_CONST) {
- if (var->IsLookupSlot()) {
- // Assignment to var.
- __ push(eax); // Value.
- __ push(esi); // Context.
- __ push(Immediate(var->name()));
- __ push(Immediate(Smi::FromInt(language_mode())));
- __ CallRuntime(Runtime::kStoreLookupSlot, 4);
- } else {
- // Assignment to var or initializing assignment to let/const in harmony
- // mode.
- DCHECK(var->IsStackAllocated() || var->IsContextSlot());
- MemOperand location = VarOperand(var, ecx);
- if (generate_debug_code_ && op == Token::INIT_LET) {
- // Check for an uninitialized let binding.
- __ mov(edx, location);
- __ cmp(edx, isolate()->factory()->the_hole_value());
- __ Check(equal, kLetBindingReInitialization);
- }
- EmitStoreToStackLocalOrContextSlot(var, location);
- }
-
- } else if (op == Token::INIT_CONST_LEGACY) {
- // Const initializers need a write barrier.
- DCHECK(var->mode() == CONST_LEGACY);
- DCHECK(!var->IsParameter()); // No const parameters.
- if (var->IsLookupSlot()) {
- __ push(eax);
- __ push(esi);
- __ push(Immediate(var->name()));
- __ CallRuntime(Runtime::kInitializeLegacyConstLookupSlot, 3);
- } else {
- DCHECK(var->IsStackLocal() || var->IsContextSlot());
- Label skip;
- MemOperand location = VarOperand(var, ecx);
- __ mov(edx, location);
- __ cmp(edx, isolate()->factory()->the_hole_value());
- __ j(not_equal, &skip, Label::kNear);
- EmitStoreToStackLocalOrContextSlot(var, location);
- __ bind(&skip);
- }
-
- } else {
- DCHECK(var->mode() == CONST_LEGACY && op != Token::INIT_CONST_LEGACY);
- if (is_strict(language_mode())) {
- __ CallRuntime(Runtime::kThrowConstAssignError, 0);
- }
- // Silently ignore store in sloppy mode.
- }
-}
-
-
-void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) {
- // Assignment to a property, using a named store IC.
- // eax : value
- // esp[0] : receiver
- Property* prop = expr->target()->AsProperty();
- DCHECK(prop != NULL);
- DCHECK(prop->key()->IsLiteral());
-
- __ mov(StoreDescriptor::NameRegister(), prop->key()->AsLiteral()->value());
- __ pop(StoreDescriptor::ReceiverRegister());
- if (FLAG_vector_stores) {
- EmitLoadStoreICSlot(expr->AssignmentSlot());
- CallStoreIC();
- } else {
- CallStoreIC(expr->AssignmentFeedbackId());
- }
- PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitNamedSuperPropertyStore(Property* prop) {
- // Assignment to named property of super.
- // eax : value
- // stack : receiver ('this'), home_object
- DCHECK(prop != NULL);
- Literal* key = prop->key()->AsLiteral();
- DCHECK(key != NULL);
-
- __ push(Immediate(key->value()));
- __ push(eax);
- __ CallRuntime((is_strict(language_mode()) ? Runtime::kStoreToSuper_Strict
- : Runtime::kStoreToSuper_Sloppy),
- 4);
-}
-
-
-void FullCodeGenerator::EmitKeyedSuperPropertyStore(Property* prop) {
- // Assignment to named property of super.
- // eax : value
- // stack : receiver ('this'), home_object, key
-
- __ push(eax);
- __ CallRuntime(
- (is_strict(language_mode()) ? Runtime::kStoreKeyedToSuper_Strict
- : Runtime::kStoreKeyedToSuper_Sloppy),
- 4);
-}
-
-
-void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) {
- // Assignment to a property, using a keyed store IC.
- // eax : value
- // esp[0] : key
- // esp[kPointerSize] : receiver
-
- __ pop(StoreDescriptor::NameRegister()); // Key.
- __ pop(StoreDescriptor::ReceiverRegister());
- DCHECK(StoreDescriptor::ValueRegister().is(eax));
- Handle<Code> ic =
- CodeFactory::KeyedStoreIC(isolate(), language_mode()).code();
- if (FLAG_vector_stores) {
- EmitLoadStoreICSlot(expr->AssignmentSlot());
- CallIC(ic);
- } else {
- CallIC(ic, expr->AssignmentFeedbackId());
- }
-
- PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::VisitProperty(Property* expr) {
- Comment cmnt(masm_, "[ Property");
- SetExpressionPosition(expr);
-
- Expression* key = expr->key();
-
- if (key->IsPropertyName()) {
- if (!expr->IsSuperAccess()) {
- VisitForAccumulatorValue(expr->obj());
- __ Move(LoadDescriptor::ReceiverRegister(), result_register());
- EmitNamedPropertyLoad(expr);
- } else {
- VisitForStackValue(expr->obj()->AsSuperPropertyReference()->this_var());
- VisitForStackValue(
- expr->obj()->AsSuperPropertyReference()->home_object());
- EmitNamedSuperPropertyLoad(expr);
- }
- } else {
- if (!expr->IsSuperAccess()) {
- VisitForStackValue(expr->obj());
- VisitForAccumulatorValue(expr->key());
- __ pop(LoadDescriptor::ReceiverRegister()); // Object.
- __ Move(LoadDescriptor::NameRegister(), result_register()); // Key.
- EmitKeyedPropertyLoad(expr);
- } else {
- VisitForStackValue(expr->obj()->AsSuperPropertyReference()->this_var());
- VisitForStackValue(
- expr->obj()->AsSuperPropertyReference()->home_object());
- VisitForStackValue(expr->key());
- EmitKeyedSuperPropertyLoad(expr);
- }
- }
- PrepareForBailoutForId(expr->LoadId(), TOS_REG);
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::CallIC(Handle<Code> code,
- TypeFeedbackId ast_id) {
- ic_total_count_++;
- __ call(code, RelocInfo::CODE_TARGET, ast_id);
-}
-
-
-// Code common for calls using the IC.
-void FullCodeGenerator::EmitCallWithLoadIC(Call* expr) {
- Expression* callee = expr->expression();
-
- CallICState::CallType call_type =
- callee->IsVariableProxy() ? CallICState::FUNCTION : CallICState::METHOD;
- // Get the target function.
- if (call_type == CallICState::FUNCTION) {
- { StackValueContext context(this);
- EmitVariableLoad(callee->AsVariableProxy());
- PrepareForBailout(callee, NO_REGISTERS);
- }
- // Push undefined as receiver. This is patched in the method prologue if it
- // is a sloppy mode method.
- __ push(Immediate(isolate()->factory()->undefined_value()));
- } else {
- // Load the function from the receiver.
- DCHECK(callee->IsProperty());
- DCHECK(!callee->AsProperty()->IsSuperAccess());
- __ mov(LoadDescriptor::ReceiverRegister(), Operand(esp, 0));
- EmitNamedPropertyLoad(callee->AsProperty());
- PrepareForBailoutForId(callee->AsProperty()->LoadId(), TOS_REG);
- // Push the target function under the receiver.
- __ push(Operand(esp, 0));
- __ mov(Operand(esp, kPointerSize), eax);
- }
-
- EmitCall(expr, call_type);
-}
-
-
-void FullCodeGenerator::EmitSuperCallWithLoadIC(Call* expr) {
- SetExpressionPosition(expr);
- Expression* callee = expr->expression();
- DCHECK(callee->IsProperty());
- Property* prop = callee->AsProperty();
- DCHECK(prop->IsSuperAccess());
-
- Literal* key = prop->key()->AsLiteral();
- DCHECK(!key->value()->IsSmi());
- // Load the function from the receiver.
- SuperPropertyReference* super_ref = prop->obj()->AsSuperPropertyReference();
- VisitForStackValue(super_ref->home_object());
- VisitForAccumulatorValue(super_ref->this_var());
- __ push(eax);
- __ push(eax);
- __ push(Operand(esp, kPointerSize * 2));
- __ push(Immediate(key->value()));
- __ push(Immediate(Smi::FromInt(language_mode())));
- // Stack here:
- // - home_object
- // - this (receiver)
- // - this (receiver) <-- LoadFromSuper will pop here and below.
- // - home_object
- // - key
- // - language_mode
- __ CallRuntime(Runtime::kLoadFromSuper, 4);
-
- // Replace home_object with target function.
- __ mov(Operand(esp, kPointerSize), eax);
-
- // Stack here:
- // - target function
- // - this (receiver)
- EmitCall(expr, CallICState::METHOD);
-}
-
-
-// Code common for calls using the IC.
-void FullCodeGenerator::EmitKeyedCallWithLoadIC(Call* expr,
- Expression* key) {
- // Load the key.
- VisitForAccumulatorValue(key);
-
- Expression* callee = expr->expression();
-
- // Load the function from the receiver.
- DCHECK(callee->IsProperty());
- __ mov(LoadDescriptor::ReceiverRegister(), Operand(esp, 0));
- __ mov(LoadDescriptor::NameRegister(), eax);
- EmitKeyedPropertyLoad(callee->AsProperty());
- PrepareForBailoutForId(callee->AsProperty()->LoadId(), TOS_REG);
-
- // Push the target function under the receiver.
- __ push(Operand(esp, 0));
- __ mov(Operand(esp, kPointerSize), eax);
-
- EmitCall(expr, CallICState::METHOD);
-}
-
-
-void FullCodeGenerator::EmitKeyedSuperCallWithLoadIC(Call* expr) {
- Expression* callee = expr->expression();
- DCHECK(callee->IsProperty());
- Property* prop = callee->AsProperty();
- DCHECK(prop->IsSuperAccess());
-
- SetExpressionPosition(prop);
- // Load the function from the receiver.
- SuperPropertyReference* super_ref = prop->obj()->AsSuperPropertyReference();
- VisitForStackValue(super_ref->home_object());
- VisitForAccumulatorValue(super_ref->this_var());
- __ push(eax);
- __ push(eax);
- __ push(Operand(esp, kPointerSize * 2));
- VisitForStackValue(prop->key());
- __ push(Immediate(Smi::FromInt(language_mode())));
- // Stack here:
- // - home_object
- // - this (receiver)
- // - this (receiver) <-- LoadKeyedFromSuper will pop here and below.
- // - home_object
- // - key
- // - language_mode
- __ CallRuntime(Runtime::kLoadKeyedFromSuper, 4);
-
- // Replace home_object with target function.
- __ mov(Operand(esp, kPointerSize), eax);
-
- // Stack here:
- // - target function
- // - this (receiver)
- EmitCall(expr, CallICState::METHOD);
-}
-
-
-void FullCodeGenerator::EmitCall(Call* expr, CallICState::CallType call_type) {
- // Load the arguments.
- ZoneList<Expression*>* args = expr->arguments();
- int arg_count = args->length();
- for (int i = 0; i < arg_count; i++) {
- VisitForStackValue(args->at(i));
- }
-
- SetCallPosition(expr, arg_count);
- Handle<Code> ic = CodeFactory::CallIC(isolate(), arg_count, call_type).code();
- __ Move(edx, Immediate(SmiFromSlot(expr->CallFeedbackICSlot())));
- __ mov(edi, Operand(esp, (arg_count + 1) * kPointerSize));
- // Don't assign a type feedback id to the IC, since type feedback is provided
- // by the vector above.
- CallIC(ic);
-
- RecordJSReturnSite(expr);
-
- // Restore context register.
- __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
-
- context()->DropAndPlug(1, eax);
-}
-
-
-void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) {
- // Push copy of the first argument or undefined if it doesn't exist.
- if (arg_count > 0) {
- __ push(Operand(esp, arg_count * kPointerSize));
- } else {
- __ push(Immediate(isolate()->factory()->undefined_value()));
- }
-
- // Push the enclosing function.
- __ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
-
- // Push the language mode.
- __ push(Immediate(Smi::FromInt(language_mode())));
-
- // Push the start position of the scope the calls resides in.
- __ push(Immediate(Smi::FromInt(scope()->start_position())));
-
- // Do the runtime call.
- __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 5);
-}
-
-
-// See http://www.ecma-international.org/ecma-262/6.0/#sec-function-calls.
-void FullCodeGenerator::PushCalleeAndWithBaseObject(Call* expr) {
- VariableProxy* callee = expr->expression()->AsVariableProxy();
- if (callee->var()->IsLookupSlot()) {
- Label slow, done;
- SetExpressionPosition(callee);
- // Generate code for loading from variables potentially shadowed by
- // eval-introduced variables.
- EmitDynamicLookupFastCase(callee, NOT_INSIDE_TYPEOF, &slow, &done);
-
- __ bind(&slow);
- // Call the runtime to find the function to call (returned in eax) and
- // the object holding it (returned in edx).
- __ push(context_register());
- __ push(Immediate(callee->name()));
- __ CallRuntime(Runtime::kLoadLookupSlot, 2);
- __ push(eax); // Function.
- __ push(edx); // Receiver.
- PrepareForBailoutForId(expr->LookupId(), NO_REGISTERS);
-
- // If fast case code has been generated, emit code to push the function
- // and receiver and have the slow path jump around this code.
- if (done.is_linked()) {
- Label call;
- __ jmp(&call, Label::kNear);
- __ bind(&done);
- // Push function.
- __ push(eax);
- // The receiver is implicitly the global receiver. Indicate this by
- // passing the hole to the call function stub.
- __ push(Immediate(isolate()->factory()->undefined_value()));
- __ bind(&call);
- }
- } else {
- VisitForStackValue(callee);
- // refEnv.WithBaseObject()
- __ push(Immediate(isolate()->factory()->undefined_value()));
- }
-}
-
-
-void FullCodeGenerator::VisitCall(Call* expr) {
-#ifdef DEBUG
- // We want to verify that RecordJSReturnSite gets called on all paths
- // through this function. Avoid early returns.
- expr->return_is_recorded_ = false;
-#endif
-
- Comment cmnt(masm_, "[ Call");
- Expression* callee = expr->expression();
- Call::CallType call_type = expr->GetCallType(isolate());
-
- if (call_type == Call::POSSIBLY_EVAL_CALL) {
- // In a call to eval, we first call RuntimeHidden_ResolvePossiblyDirectEval
- // to resolve the function we need to call. Then we call the resolved
- // function using the given arguments.
- ZoneList<Expression*>* args = expr->arguments();
- int arg_count = args->length();
-
- PushCalleeAndWithBaseObject(expr);
-
- // Push the arguments.
- for (int i = 0; i < arg_count; i++) {
- VisitForStackValue(args->at(i));
- }
-
- // Push a copy of the function (found below the arguments) and
- // resolve eval.
- __ push(Operand(esp, (arg_count + 1) * kPointerSize));
- EmitResolvePossiblyDirectEval(arg_count);
-
- // Touch up the stack with the resolved function.
- __ mov(Operand(esp, (arg_count + 1) * kPointerSize), eax);
-
- PrepareForBailoutForId(expr->EvalId(), NO_REGISTERS);
-
- SetCallPosition(expr, arg_count);
- CallFunctionStub stub(isolate(), arg_count, NO_CALL_FUNCTION_FLAGS);
- __ mov(edi, Operand(esp, (arg_count + 1) * kPointerSize));
- __ CallStub(&stub);
- RecordJSReturnSite(expr);
- // Restore context register.
- __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
- context()->DropAndPlug(1, eax);
-
- } else if (call_type == Call::GLOBAL_CALL) {
- EmitCallWithLoadIC(expr);
- } else if (call_type == Call::LOOKUP_SLOT_CALL) {
- // Call to a lookup slot (dynamically introduced variable).
- PushCalleeAndWithBaseObject(expr);
- EmitCall(expr);
- } else if (call_type == Call::PROPERTY_CALL) {
- Property* property = callee->AsProperty();
- bool is_named_call = property->key()->IsPropertyName();
- if (property->IsSuperAccess()) {
- if (is_named_call) {
- EmitSuperCallWithLoadIC(expr);
- } else {
- EmitKeyedSuperCallWithLoadIC(expr);
- }
- } else {
- VisitForStackValue(property->obj());
- if (is_named_call) {
- EmitCallWithLoadIC(expr);
- } else {
- EmitKeyedCallWithLoadIC(expr, property->key());
- }
- }
- } else if (call_type == Call::SUPER_CALL) {
- EmitSuperConstructorCall(expr);
- } else {
- DCHECK(call_type == Call::OTHER_CALL);
- // Call to an arbitrary expression not handled specially above.
- VisitForStackValue(callee);
- __ push(Immediate(isolate()->factory()->undefined_value()));
- // Emit function call.
- EmitCall(expr);
- }
-
-#ifdef DEBUG
- // RecordJSReturnSite should have been called.
- DCHECK(expr->return_is_recorded_);
-#endif
-}
-
-
-void FullCodeGenerator::VisitCallNew(CallNew* expr) {
- Comment cmnt(masm_, "[ CallNew");
- // According to ECMA-262, section 11.2.2, page 44, the function
- // expression in new calls must be evaluated before the
- // arguments.
-
- // Push constructor on the stack. If it's not a function it's used as
- // receiver for CALL_NON_FUNCTION, otherwise the value on the stack is
- // ignored.
- DCHECK(!expr->expression()->IsSuperPropertyReference());
- VisitForStackValue(expr->expression());
-
- // Push the arguments ("left-to-right") on the stack.
- ZoneList<Expression*>* args = expr->arguments();
- int arg_count = args->length();
- for (int i = 0; i < arg_count; i++) {
- VisitForStackValue(args->at(i));
- }
-
- // Call the construct call builtin that handles allocation and
- // constructor invocation.
- SetConstructCallPosition(expr);
-
- // Load function and argument count into edi and eax.
- __ Move(eax, Immediate(arg_count));
- __ mov(edi, Operand(esp, arg_count * kPointerSize));
-
- // Record call targets in unoptimized code.
- if (FLAG_pretenuring_call_new) {
- EnsureSlotContainsAllocationSite(expr->AllocationSiteFeedbackSlot());
- DCHECK(expr->AllocationSiteFeedbackSlot().ToInt() ==
- expr->CallNewFeedbackSlot().ToInt() + 1);
- }
-
- __ LoadHeapObject(ebx, FeedbackVector());
- __ mov(edx, Immediate(SmiFromSlot(expr->CallNewFeedbackSlot())));
-
- CallConstructStub stub(isolate(), RECORD_CONSTRUCTOR_TARGET);
- __ call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
- PrepareForBailoutForId(expr->ReturnId(), TOS_REG);
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitSuperConstructorCall(Call* expr) {
- SuperCallReference* super_call_ref =
- expr->expression()->AsSuperCallReference();
- DCHECK_NOT_NULL(super_call_ref);
-
- EmitLoadSuperConstructor(super_call_ref);
- __ push(result_register());
-
- // Push the arguments ("left-to-right") on the stack.
- ZoneList<Expression*>* args = expr->arguments();
- int arg_count = args->length();
- for (int i = 0; i < arg_count; i++) {
- VisitForStackValue(args->at(i));
- }
-
- // Call the construct call builtin that handles allocation and
- // constructor invocation.
- SetConstructCallPosition(expr);
-
- // Load original constructor into ecx.
- VisitForAccumulatorValue(super_call_ref->new_target_var());
- __ mov(ecx, result_register());
-
- // Load function and argument count into edi and eax.
- __ Move(eax, Immediate(arg_count));
- __ mov(edi, Operand(esp, arg_count * kPointerSize));
-
- // Record call targets in unoptimized code.
- if (FLAG_pretenuring_call_new) {
- UNREACHABLE();
- /* TODO(dslomov): support pretenuring.
- EnsureSlotContainsAllocationSite(expr->AllocationSiteFeedbackSlot());
- DCHECK(expr->AllocationSiteFeedbackSlot().ToInt() ==
- expr->CallNewFeedbackSlot().ToInt() + 1);
- */
- }
-
- __ LoadHeapObject(ebx, FeedbackVector());
- __ mov(edx, Immediate(SmiFromSlot(expr->CallFeedbackSlot())));
-
- CallConstructStub stub(isolate(), SUPER_CALL_RECORD_TARGET);
- __ call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
-
- RecordJSReturnSite(expr);
-
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitIsSmi(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0));
-
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- __ test(eax, Immediate(kSmiTagMask));
- Split(zero, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsNonNegativeSmi(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0));
-
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- __ test(eax, Immediate(kSmiTagMask | 0x80000000));
- Split(zero, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsObject(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0));
-
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- __ JumpIfSmi(eax, if_false);
- __ cmp(eax, isolate()->factory()->null_value());
- __ j(equal, if_true);
- __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset));
- // Undetectable objects behave like undefined when tested with typeof.
- __ movzx_b(ecx, FieldOperand(ebx, Map::kBitFieldOffset));
- __ test(ecx, Immediate(1 << Map::kIsUndetectable));
- __ j(not_zero, if_false);
- __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceTypeOffset));
- __ cmp(ecx, FIRST_NONCALLABLE_SPEC_OBJECT_TYPE);
- __ j(below, if_false);
- __ cmp(ecx, LAST_NONCALLABLE_SPEC_OBJECT_TYPE);
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- Split(below_equal, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsSpecObject(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0));
-
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- __ JumpIfSmi(eax, if_false);
- __ CmpObjectType(eax, FIRST_SPEC_OBJECT_TYPE, ebx);
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- Split(above_equal, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsUndetectableObject(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0));
-
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- __ JumpIfSmi(eax, if_false);
- __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset));
- __ movzx_b(ebx, FieldOperand(ebx, Map::kBitFieldOffset));
- __ test(ebx, Immediate(1 << Map::kIsUndetectable));
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- Split(not_zero, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
- CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0));
-
- Label materialize_true, materialize_false, skip_lookup;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- __ AssertNotSmi(eax);
-
- // Check whether this map has already been checked to be safe for default
- // valueOf.
- __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset));
- __ test_b(FieldOperand(ebx, Map::kBitField2Offset),
- 1 << Map::kStringWrapperSafeForDefaultValueOf);
- __ j(not_zero, &skip_lookup);
-
- // Check for fast case object. Return false for slow case objects.
- __ mov(ecx, FieldOperand(eax, JSObject::kPropertiesOffset));
- __ mov(ecx, FieldOperand(ecx, HeapObject::kMapOffset));
- __ cmp(ecx, isolate()->factory()->hash_table_map());
- __ j(equal, if_false);
-
- // Look for valueOf string in the descriptor array, and indicate false if
- // found. Since we omit an enumeration index check, if it is added via a
- // transition that shares its descriptor array, this is a false positive.
- Label entry, loop, done;
-
- // Skip loop if no descriptors are valid.
- __ NumberOfOwnDescriptors(ecx, ebx);
- __ cmp(ecx, 0);
- __ j(equal, &done);
-
- __ LoadInstanceDescriptors(ebx, ebx);
- // ebx: descriptor array.
- // ecx: valid entries in the descriptor array.
- // Calculate the end of the descriptor array.
- STATIC_ASSERT(kSmiTag == 0);
- STATIC_ASSERT(kSmiTagSize == 1);
- STATIC_ASSERT(kPointerSize == 4);
- __ imul(ecx, ecx, DescriptorArray::kDescriptorSize);
- __ lea(ecx, Operand(ebx, ecx, times_4, DescriptorArray::kFirstOffset));
- // Calculate location of the first key name.
- __ add(ebx, Immediate(DescriptorArray::kFirstOffset));
- // Loop through all the keys in the descriptor array. If one of these is the
- // internalized string "valueOf" the result is false.
- __ jmp(&entry);
- __ bind(&loop);
- __ mov(edx, FieldOperand(ebx, 0));
- __ cmp(edx, isolate()->factory()->value_of_string());
- __ j(equal, if_false);
- __ add(ebx, Immediate(DescriptorArray::kDescriptorSize * kPointerSize));
- __ bind(&entry);
- __ cmp(ebx, ecx);
- __ j(not_equal, &loop);
-
- __ bind(&done);
-
- // Reload map as register ebx was used as temporary above.
- __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset));
-
- // Set the bit in the map to indicate that there is no local valueOf field.
- __ or_(FieldOperand(ebx, Map::kBitField2Offset),
- Immediate(1 << Map::kStringWrapperSafeForDefaultValueOf));
-
- __ bind(&skip_lookup);
-
- // If a valueOf property is not found on the object check that its
- // prototype is the un-modified String prototype. If not result is false.
- __ mov(ecx, FieldOperand(ebx, Map::kPrototypeOffset));
- __ JumpIfSmi(ecx, if_false);
- __ mov(ecx, FieldOperand(ecx, HeapObject::kMapOffset));
- __ mov(edx, Operand(esi, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX)));
- __ mov(edx,
- FieldOperand(edx, GlobalObject::kNativeContextOffset));
- __ cmp(ecx,
- ContextOperand(edx,
- Context::STRING_FUNCTION_PROTOTYPE_MAP_INDEX));
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- Split(equal, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsFunction(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0));
-
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- __ JumpIfSmi(eax, if_false);
- __ CmpObjectType(eax, JS_FUNCTION_TYPE, ebx);
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- Split(equal, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsMinusZero(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0));
-
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- Handle<Map> map = masm()->isolate()->factory()->heap_number_map();
- __ CheckMap(eax, map, if_false, DO_SMI_CHECK);
- // Check if the exponent half is 0x80000000. Comparing against 1 and
- // checking for overflow is the shortest possible encoding.
- __ cmp(FieldOperand(eax, HeapNumber::kExponentOffset), Immediate(0x1));
- __ j(no_overflow, if_false);
- __ cmp(FieldOperand(eax, HeapNumber::kMantissaOffset), Immediate(0x0));
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- Split(equal, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsArray(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0));
-
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- __ JumpIfSmi(eax, if_false);
- __ CmpObjectType(eax, JS_ARRAY_TYPE, ebx);
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- Split(equal, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsTypedArray(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0));
-
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
- &if_false, &fall_through);
-
- __ JumpIfSmi(eax, if_false);
- __ CmpObjectType(eax, JS_TYPED_ARRAY_TYPE, ebx);
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- Split(equal, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsRegExp(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0));
-
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- __ JumpIfSmi(eax, if_false);
- __ CmpObjectType(eax, JS_REGEXP_TYPE, ebx);
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- Split(equal, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsJSProxy(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0));
-
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
- &if_false, &fall_through);
-
- __ JumpIfSmi(eax, if_false);
- Register map = ebx;
- __ mov(map, FieldOperand(eax, HeapObject::kMapOffset));
- __ CmpInstanceType(map, FIRST_JS_PROXY_TYPE);
- __ j(less, if_false);
- __ CmpInstanceType(map, LAST_JS_PROXY_TYPE);
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- Split(less_equal, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitIsConstructCall(CallRuntime* expr) {
- DCHECK(expr->arguments()->length() == 0);
-
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- // Get the frame pointer for the calling frame.
- __ mov(eax, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
-
- // Skip the arguments adaptor frame if it exists.
- Label check_frame_marker;
- __ cmp(Operand(eax, StandardFrameConstants::kContextOffset),
- Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
- __ j(not_equal, &check_frame_marker);
- __ mov(eax, Operand(eax, StandardFrameConstants::kCallerFPOffset));
-
- // Check the marker in the calling frame.
- __ bind(&check_frame_marker);
- __ cmp(Operand(eax, StandardFrameConstants::kMarkerOffset),
- Immediate(Smi::FromInt(StackFrame::CONSTRUCT)));
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- Split(equal, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitObjectEquals(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 2);
-
- // Load the two objects into registers and perform the comparison.
- VisitForStackValue(args->at(0));
- VisitForAccumulatorValue(args->at(1));
-
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- __ pop(ebx);
- __ cmp(eax, ebx);
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- Split(equal, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitArguments(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- // ArgumentsAccessStub expects the key in edx and the formal
- // parameter count in eax.
- VisitForAccumulatorValue(args->at(0));
- __ mov(edx, eax);
- __ Move(eax, Immediate(Smi::FromInt(info_->scope()->num_parameters())));
- ArgumentsAccessStub stub(isolate(), ArgumentsAccessStub::READ_ELEMENT);
- __ CallStub(&stub);
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitArgumentsLength(CallRuntime* expr) {
- DCHECK(expr->arguments()->length() == 0);
-
- Label exit;
- // Get the number of formal parameters.
- __ Move(eax, Immediate(Smi::FromInt(info_->scope()->num_parameters())));
-
- // Check if the calling frame is an arguments adaptor frame.
- __ mov(ebx, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
- __ cmp(Operand(ebx, StandardFrameConstants::kContextOffset),
- Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
- __ j(not_equal, &exit);
-
- // Arguments adaptor case: Read the arguments length from the
- // adaptor frame.
- __ mov(eax, Operand(ebx, ArgumentsAdaptorFrameConstants::kLengthOffset));
-
- __ bind(&exit);
- __ AssertSmi(eax);
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitClassOf(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
- Label done, null, function, non_function_constructor;
-
- VisitForAccumulatorValue(args->at(0));
-
- // If the object is a smi, we return null.
- __ JumpIfSmi(eax, &null);
-
- // Check that the object is a JS object but take special care of JS
- // functions to make sure they have 'Function' as their class.
- // Assume that there are only two callable types, and one of them is at
- // either end of the type range for JS object types. Saves extra comparisons.
- STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2);
- __ CmpObjectType(eax, FIRST_SPEC_OBJECT_TYPE, eax);
- // Map is now in eax.
- __ j(below, &null);
- STATIC_ASSERT(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE ==
- FIRST_SPEC_OBJECT_TYPE + 1);
- __ j(equal, &function);
-
- __ CmpInstanceType(eax, LAST_SPEC_OBJECT_TYPE);
- STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE ==
- LAST_SPEC_OBJECT_TYPE - 1);
- __ j(equal, &function);
- // Assume that there is no larger type.
- STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE == LAST_TYPE - 1);
-
- // Check if the constructor in the map is a JS function.
- __ GetMapConstructor(eax, eax, ebx);
- __ CmpInstanceType(ebx, JS_FUNCTION_TYPE);
- __ j(not_equal, &non_function_constructor);
-
- // eax now contains the constructor function. Grab the
- // instance class name from there.
- __ mov(eax, FieldOperand(eax, JSFunction::kSharedFunctionInfoOffset));
- __ mov(eax, FieldOperand(eax, SharedFunctionInfo::kInstanceClassNameOffset));
- __ jmp(&done);
-
- // Functions have class 'Function'.
- __ bind(&function);
- __ mov(eax, isolate()->factory()->Function_string());
- __ jmp(&done);
-
- // Objects with a non-function constructor have class 'Object'.
- __ bind(&non_function_constructor);
- __ mov(eax, isolate()->factory()->Object_string());
- __ jmp(&done);
-
- // Non-JS objects have class null.
- __ bind(&null);
- __ mov(eax, isolate()->factory()->null_value());
-
- // All done.
- __ bind(&done);
-
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitValueOf(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0)); // Load the object.
-
- Label done;
- // If the object is a smi return the object.
- __ JumpIfSmi(eax, &done, Label::kNear);
- // If the object is not a value type, return the object.
- __ CmpObjectType(eax, JS_VALUE_TYPE, ebx);
- __ j(not_equal, &done, Label::kNear);
- __ mov(eax, FieldOperand(eax, JSValue::kValueOffset));
-
- __ bind(&done);
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitIsDate(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK_EQ(1, args->length());
-
- VisitForAccumulatorValue(args->at(0));
-
- Label materialize_true, materialize_false;
- Label* if_true = nullptr;
- Label* if_false = nullptr;
- Label* fall_through = nullptr;
- context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
- &if_false, &fall_through);
-
- __ JumpIfSmi(eax, if_false);
- __ CmpObjectType(eax, JS_DATE_TYPE, ebx);
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- Split(equal, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 2);
- DCHECK_NOT_NULL(args->at(1)->AsLiteral());
- Smi* index = Smi::cast(*(args->at(1)->AsLiteral()->value()));
-
- VisitForAccumulatorValue(args->at(0)); // Load the object.
-
- Register object = eax;
- Register result = eax;
- Register scratch = ecx;
-
- if (index->value() == 0) {
- __ mov(result, FieldOperand(object, JSDate::kValueOffset));
- } else {
- Label runtime, done;
- if (index->value() < JSDate::kFirstUncachedField) {
- ExternalReference stamp = ExternalReference::date_cache_stamp(isolate());
- __ mov(scratch, Operand::StaticVariable(stamp));
- __ cmp(scratch, FieldOperand(object, JSDate::kCacheStampOffset));
- __ j(not_equal, &runtime, Label::kNear);
- __ mov(result, FieldOperand(object, JSDate::kValueOffset +
- kPointerSize * index->value()));
- __ jmp(&done, Label::kNear);
- }
- __ bind(&runtime);
- __ PrepareCallCFunction(2, scratch);
- __ mov(Operand(esp, 0), object);
- __ mov(Operand(esp, 1 * kPointerSize), Immediate(index));
- __ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2);
- __ bind(&done);
- }
-
- context()->Plug(result);
-}
-
-
-void FullCodeGenerator::EmitOneByteSeqStringSetChar(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK_EQ(3, args->length());
-
- Register string = eax;
- Register index = ebx;
- Register value = ecx;
-
- VisitForStackValue(args->at(0)); // index
- VisitForStackValue(args->at(1)); // value
- VisitForAccumulatorValue(args->at(2)); // string
-
- __ pop(value);
- __ pop(index);
-
- if (FLAG_debug_code) {
- __ test(value, Immediate(kSmiTagMask));
- __ Check(zero, kNonSmiValue);
- __ test(index, Immediate(kSmiTagMask));
- __ Check(zero, kNonSmiValue);
- }
-
- __ SmiUntag(value);
- __ SmiUntag(index);
-
- if (FLAG_debug_code) {
- static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag;
- __ EmitSeqStringSetCharCheck(string, index, value, one_byte_seq_type);
- }
-
- __ mov_b(FieldOperand(string, index, times_1, SeqOneByteString::kHeaderSize),
- value);
- context()->Plug(string);
-}
-
-
-void FullCodeGenerator::EmitTwoByteSeqStringSetChar(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK_EQ(3, args->length());
-
- Register string = eax;
- Register index = ebx;
- Register value = ecx;
-
- VisitForStackValue(args->at(0)); // index
- VisitForStackValue(args->at(1)); // value
- VisitForAccumulatorValue(args->at(2)); // string
- __ pop(value);
- __ pop(index);
-
- if (FLAG_debug_code) {
- __ test(value, Immediate(kSmiTagMask));
- __ Check(zero, kNonSmiValue);
- __ test(index, Immediate(kSmiTagMask));
- __ Check(zero, kNonSmiValue);
- __ SmiUntag(index);
- static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag;
- __ EmitSeqStringSetCharCheck(string, index, value, two_byte_seq_type);
- __ SmiTag(index);
- }
-
- __ SmiUntag(value);
- // No need to untag a smi for two-byte addressing.
- __ mov_w(FieldOperand(string, index, times_1, SeqTwoByteString::kHeaderSize),
- value);
- context()->Plug(string);
-}
-
-
-void FullCodeGenerator::EmitSetValueOf(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 2);
-
- VisitForStackValue(args->at(0)); // Load the object.
- VisitForAccumulatorValue(args->at(1)); // Load the value.
- __ pop(ebx); // eax = value. ebx = object.
-
- Label done;
- // If the object is a smi, return the value.
- __ JumpIfSmi(ebx, &done, Label::kNear);
-
- // If the object is not a value type, return the value.
- __ CmpObjectType(ebx, JS_VALUE_TYPE, ecx);
- __ j(not_equal, &done, Label::kNear);
-
- // Store the value.
- __ mov(FieldOperand(ebx, JSValue::kValueOffset), eax);
-
- // Update the write barrier. Save the value as it will be
- // overwritten by the write barrier code and is needed afterward.
- __ mov(edx, eax);
- __ RecordWriteField(ebx, JSValue::kValueOffset, edx, ecx, kDontSaveFPRegs);
-
- __ bind(&done);
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitNumberToString(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK_EQ(args->length(), 1);
-
- // Load the argument into eax and call the stub.
- VisitForAccumulatorValue(args->at(0));
-
- NumberToStringStub stub(isolate());
- __ CallStub(&stub);
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitStringCharFromCode(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0));
-
- Label done;
- StringCharFromCodeGenerator generator(eax, ebx);
- generator.GenerateFast(masm_);
- __ jmp(&done);
-
- NopRuntimeCallHelper call_helper;
- generator.GenerateSlow(masm_, call_helper);
-
- __ bind(&done);
- context()->Plug(ebx);
-}
-
-
-void FullCodeGenerator::EmitStringCharCodeAt(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 2);
-
- VisitForStackValue(args->at(0));
- VisitForAccumulatorValue(args->at(1));
-
- Register object = ebx;
- Register index = eax;
- Register result = edx;
-
- __ pop(object);
-
- Label need_conversion;
- Label index_out_of_range;
- Label done;
- StringCharCodeAtGenerator generator(object,
- index,
- result,
- &need_conversion,
- &need_conversion,
- &index_out_of_range,
- STRING_INDEX_IS_NUMBER);
- generator.GenerateFast(masm_);
- __ jmp(&done);
-
- __ bind(&index_out_of_range);
- // When the index is out of range, the spec requires us to return
- // NaN.
- __ Move(result, Immediate(isolate()->factory()->nan_value()));
- __ jmp(&done);
-
- __ bind(&need_conversion);
- // Move the undefined value into the result register, which will
- // trigger conversion.
- __ Move(result, Immediate(isolate()->factory()->undefined_value()));
- __ jmp(&done);
-
- NopRuntimeCallHelper call_helper;
- generator.GenerateSlow(masm_, NOT_PART_OF_IC_HANDLER, call_helper);
-
- __ bind(&done);
- context()->Plug(result);
-}
-
-
-void FullCodeGenerator::EmitStringCharAt(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 2);
-
- VisitForStackValue(args->at(0));
- VisitForAccumulatorValue(args->at(1));
-
- Register object = ebx;
- Register index = eax;
- Register scratch = edx;
- Register result = eax;
-
- __ pop(object);
-
- Label need_conversion;
- Label index_out_of_range;
- Label done;
- StringCharAtGenerator generator(object,
- index,
- scratch,
- result,
- &need_conversion,
- &need_conversion,
- &index_out_of_range,
- STRING_INDEX_IS_NUMBER);
- generator.GenerateFast(masm_);
- __ jmp(&done);
-
- __ bind(&index_out_of_range);
- // When the index is out of range, the spec requires us to return
- // the empty string.
- __ Move(result, Immediate(isolate()->factory()->empty_string()));
- __ jmp(&done);
-
- __ bind(&need_conversion);
- // Move smi zero into the result register, which will trigger
- // conversion.
- __ Move(result, Immediate(Smi::FromInt(0)));
- __ jmp(&done);
-
- NopRuntimeCallHelper call_helper;
- generator.GenerateSlow(masm_, NOT_PART_OF_IC_HANDLER, call_helper);
-
- __ bind(&done);
- context()->Plug(result);
-}
-
-
-void FullCodeGenerator::EmitStringAdd(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK_EQ(2, args->length());
- VisitForStackValue(args->at(0));
- VisitForAccumulatorValue(args->at(1));
-
- __ pop(edx);
- StringAddStub stub(isolate(), STRING_ADD_CHECK_BOTH, NOT_TENURED);
- __ CallStub(&stub);
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitCallFunction(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() >= 2);
-
- int arg_count = args->length() - 2; // 2 ~ receiver and function.
- for (int i = 0; i < arg_count + 1; ++i) {
- VisitForStackValue(args->at(i));
- }
- VisitForAccumulatorValue(args->last()); // Function.
-
- Label runtime, done;
- // Check for non-function argument (including proxy).
- __ JumpIfSmi(eax, &runtime);
- __ CmpObjectType(eax, JS_FUNCTION_TYPE, ebx);
- __ j(not_equal, &runtime);
-
- // InvokeFunction requires the function in edi. Move it in there.
- __ mov(edi, result_register());
- ParameterCount count(arg_count);
- __ InvokeFunction(edi, count, CALL_FUNCTION, NullCallWrapper());
- __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
- __ jmp(&done);
-
- __ bind(&runtime);
- __ push(eax);
- __ CallRuntime(Runtime::kCall, args->length());
- __ bind(&done);
-
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitDefaultConstructorCallSuper(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 2);
-
- // new.target
- VisitForStackValue(args->at(0));
-
- // .this_function
- VisitForStackValue(args->at(1));
- __ CallRuntime(Runtime::kGetPrototype, 1);
- __ push(result_register());
-
- // Load original constructor into ecx.
- __ mov(ecx, Operand(esp, 1 * kPointerSize));
-
- // Check if the calling frame is an arguments adaptor frame.
- Label adaptor_frame, args_set_up, runtime;
- __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
- __ mov(ebx, Operand(edx, StandardFrameConstants::kContextOffset));
- __ cmp(ebx, Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
- __ j(equal, &adaptor_frame);
- // default constructor has no arguments, so no adaptor frame means no args.
- __ mov(eax, Immediate(0));
- __ jmp(&args_set_up);
-
- // Copy arguments from adaptor frame.
- {
- __ bind(&adaptor_frame);
- __ mov(ebx, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset));
- __ SmiUntag(ebx);
-
- __ mov(eax, ebx);
- __ lea(edx, Operand(edx, ebx, times_pointer_size,
- StandardFrameConstants::kCallerSPOffset));
- Label loop;
- __ bind(&loop);
- __ push(Operand(edx, -1 * kPointerSize));
- __ sub(edx, Immediate(kPointerSize));
- __ dec(ebx);
- __ j(not_zero, &loop);
- }
-
- __ bind(&args_set_up);
-
- __ mov(edi, Operand(esp, eax, times_pointer_size, 0));
- __ mov(ebx, Immediate(isolate()->factory()->undefined_value()));
- CallConstructStub stub(isolate(), SUPER_CONSTRUCTOR_CALL);
- __ call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
-
- __ Drop(1);
-
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitRegExpConstructResult(CallRuntime* expr) {
- // Load the arguments on the stack and call the stub.
- RegExpConstructResultStub stub(isolate());
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 3);
- VisitForStackValue(args->at(0));
- VisitForStackValue(args->at(1));
- VisitForAccumulatorValue(args->at(2));
- __ pop(ebx);
- __ pop(ecx);
- __ CallStub(&stub);
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitGetFromCache(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK_EQ(2, args->length());
-
- DCHECK_NOT_NULL(args->at(0)->AsLiteral());
- int cache_id = Smi::cast(*(args->at(0)->AsLiteral()->value()))->value();
-
- Handle<FixedArray> jsfunction_result_caches(
- isolate()->native_context()->jsfunction_result_caches());
- if (jsfunction_result_caches->length() <= cache_id) {
- __ Abort(kAttemptToUseUndefinedCache);
- __ mov(eax, isolate()->factory()->undefined_value());
- context()->Plug(eax);
- return;
- }
-
- VisitForAccumulatorValue(args->at(1));
-
- Register key = eax;
- Register cache = ebx;
- Register tmp = ecx;
- __ mov(cache, ContextOperand(esi, Context::GLOBAL_OBJECT_INDEX));
- __ mov(cache,
- FieldOperand(cache, GlobalObject::kNativeContextOffset));
- __ mov(cache, ContextOperand(cache, Context::JSFUNCTION_RESULT_CACHES_INDEX));
- __ mov(cache,
- FieldOperand(cache, FixedArray::OffsetOfElementAt(cache_id)));
-
- Label done, not_found;
- STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1);
- __ mov(tmp, FieldOperand(cache, JSFunctionResultCache::kFingerOffset));
- // tmp now holds finger offset as a smi.
- __ cmp(key, FixedArrayElementOperand(cache, tmp));
- __ j(not_equal, &not_found);
-
- __ mov(eax, FixedArrayElementOperand(cache, tmp, 1));
- __ jmp(&done);
-
- __ bind(&not_found);
- // Call runtime to perform the lookup.
- __ push(cache);
- __ push(key);
- __ CallRuntime(Runtime::kGetFromCacheRT, 2);
-
- __ bind(&done);
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitHasCachedArrayIndex(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
-
- VisitForAccumulatorValue(args->at(0));
-
- __ AssertString(eax);
-
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- __ test(FieldOperand(eax, String::kHashFieldOffset),
- Immediate(String::kContainsCachedArrayIndexMask));
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- Split(zero, if_true, if_false, fall_through);
-
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitGetCachedArrayIndex(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 1);
- VisitForAccumulatorValue(args->at(0));
-
- __ AssertString(eax);
-
- __ mov(eax, FieldOperand(eax, String::kHashFieldOffset));
- __ IndexFromHash(eax, eax);
-
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitFastOneByteArrayJoin(CallRuntime* expr) {
- Label bailout, done, one_char_separator, long_separator,
- non_trivial_array, not_size_one_array, loop,
- loop_1, loop_1_condition, loop_2, loop_2_entry, loop_3, loop_3_entry;
-
- ZoneList<Expression*>* args = expr->arguments();
- DCHECK(args->length() == 2);
- // We will leave the separator on the stack until the end of the function.
- VisitForStackValue(args->at(1));
- // Load this to eax (= array)
- VisitForAccumulatorValue(args->at(0));
- // All aliases of the same register have disjoint lifetimes.
- Register array = eax;
- Register elements = no_reg; // Will be eax.
-
- Register index = edx;
-
- Register string_length = ecx;
-
- Register string = esi;
-
- Register scratch = ebx;
-
- Register array_length = edi;
- Register result_pos = no_reg; // Will be edi.
-
- // Separator operand is already pushed.
- Operand separator_operand = Operand(esp, 2 * kPointerSize);
- Operand result_operand = Operand(esp, 1 * kPointerSize);
- Operand array_length_operand = Operand(esp, 0);
- __ sub(esp, Immediate(2 * kPointerSize));
- __ cld();
- // Check that the array is a JSArray
- __ JumpIfSmi(array, &bailout);
- __ CmpObjectType(array, JS_ARRAY_TYPE, scratch);
- __ j(not_equal, &bailout);
-
- // Check that the array has fast elements.
- __ CheckFastElements(scratch, &bailout);
-
- // If the array has length zero, return the empty string.
- __ mov(array_length, FieldOperand(array, JSArray::kLengthOffset));
- __ SmiUntag(array_length);
- __ j(not_zero, &non_trivial_array);
- __ mov(result_operand, isolate()->factory()->empty_string());
- __ jmp(&done);
-
- // Save the array length.
- __ bind(&non_trivial_array);
- __ mov(array_length_operand, array_length);
-
- // Save the FixedArray containing array's elements.
- // End of array's live range.
- elements = array;
- __ mov(elements, FieldOperand(array, JSArray::kElementsOffset));
- array = no_reg;
-
-
- // Check that all array elements are sequential one-byte strings, and
- // accumulate the sum of their lengths, as a smi-encoded value.
- __ Move(index, Immediate(0));
- __ Move(string_length, Immediate(0));
- // Loop condition: while (index < length).
- // Live loop registers: index, array_length, string,
- // scratch, string_length, elements.
- if (generate_debug_code_) {
- __ cmp(index, array_length);
- __ Assert(less, kNoEmptyArraysHereInEmitFastOneByteArrayJoin);
- }
- __ bind(&loop);
- __ mov(string, FieldOperand(elements,
- index,
- times_pointer_size,
- FixedArray::kHeaderSize));
- __ JumpIfSmi(string, &bailout);
- __ mov(scratch, FieldOperand(string, HeapObject::kMapOffset));
- __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
- __ and_(scratch, Immediate(
- kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask));
- __ cmp(scratch, kStringTag | kOneByteStringTag | kSeqStringTag);
- __ j(not_equal, &bailout);
- __ add(string_length,
- FieldOperand(string, SeqOneByteString::kLengthOffset));
- __ j(overflow, &bailout);
- __ add(index, Immediate(1));
- __ cmp(index, array_length);
- __ j(less, &loop);
-
- // If array_length is 1, return elements[0], a string.
- __ cmp(array_length, 1);
- __ j(not_equal, &not_size_one_array);
- __ mov(scratch, FieldOperand(elements, FixedArray::kHeaderSize));
- __ mov(result_operand, scratch);
- __ jmp(&done);
-
- __ bind(&not_size_one_array);
-
- // End of array_length live range.
- result_pos = array_length;
- array_length = no_reg;
-
- // Live registers:
- // string_length: Sum of string lengths, as a smi.
- // elements: FixedArray of strings.
-
- // Check that the separator is a flat one-byte string.
- __ mov(string, separator_operand);
- __ JumpIfSmi(string, &bailout);
- __ mov(scratch, FieldOperand(string, HeapObject::kMapOffset));
- __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
- __ and_(scratch, Immediate(
- kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask));
- __ cmp(scratch, kStringTag | kOneByteStringTag | kSeqStringTag);
- __ j(not_equal, &bailout);
-
- // Add (separator length times array_length) - separator length
- // to string_length.
- __ mov(scratch, separator_operand);
- __ mov(scratch, FieldOperand(scratch, SeqOneByteString::kLengthOffset));
- __ sub(string_length, scratch); // May be negative, temporarily.
- __ imul(scratch, array_length_operand);
- __ j(overflow, &bailout);
- __ add(string_length, scratch);
- __ j(overflow, &bailout);
-
- __ shr(string_length, 1);
- // Live registers and stack values:
- // string_length
- // elements
- __ AllocateOneByteString(result_pos, string_length, scratch, index, string,
- &bailout);
- __ mov(result_operand, result_pos);
- __ lea(result_pos, FieldOperand(result_pos, SeqOneByteString::kHeaderSize));
-
-
- __ mov(string, separator_operand);
- __ cmp(FieldOperand(string, SeqOneByteString::kLengthOffset),
- Immediate(Smi::FromInt(1)));
- __ j(equal, &one_char_separator);
- __ j(greater, &long_separator);
-
-
- // Empty separator case
- __ mov(index, Immediate(0));
- __ jmp(&loop_1_condition);
- // Loop condition: while (index < length).
- __ bind(&loop_1);
- // Each iteration of the loop concatenates one string to the result.
- // Live values in registers:
- // index: which element of the elements array we are adding to the result.
- // result_pos: the position to which we are currently copying characters.
- // elements: the FixedArray of strings we are joining.
-
- // Get string = array[index].
- __ mov(string, FieldOperand(elements, index,
- times_pointer_size,
- FixedArray::kHeaderSize));
- __ mov(string_length,
- FieldOperand(string, String::kLengthOffset));
- __ shr(string_length, 1);
- __ lea(string,
- FieldOperand(string, SeqOneByteString::kHeaderSize));
- __ CopyBytes(string, result_pos, string_length, scratch);
- __ add(index, Immediate(1));
- __ bind(&loop_1_condition);
- __ cmp(index, array_length_operand);
- __ j(less, &loop_1); // End while (index < length).
- __ jmp(&done);
-
-
-
- // One-character separator case
- __ bind(&one_char_separator);
- // Replace separator with its one-byte character value.
- __ mov_b(scratch, FieldOperand(string, SeqOneByteString::kHeaderSize));
- __ mov_b(separator_operand, scratch);
-
- __ Move(index, Immediate(0));
- // Jump into the loop after the code that copies the separator, so the first
- // element is not preceded by a separator
- __ jmp(&loop_2_entry);
- // Loop condition: while (index < length).
- __ bind(&loop_2);
- // Each iteration of the loop concatenates one string to the result.
- // Live values in registers:
- // index: which element of the elements array we are adding to the result.
- // result_pos: the position to which we are currently copying characters.
-
- // Copy the separator character to the result.
- __ mov_b(scratch, separator_operand);
- __ mov_b(Operand(result_pos, 0), scratch);
- __ inc(result_pos);
-
- __ bind(&loop_2_entry);
- // Get string = array[index].
- __ mov(string, FieldOperand(elements, index,
- times_pointer_size,
- FixedArray::kHeaderSize));
- __ mov(string_length,
- FieldOperand(string, String::kLengthOffset));
- __ shr(string_length, 1);
- __ lea(string,
- FieldOperand(string, SeqOneByteString::kHeaderSize));
- __ CopyBytes(string, result_pos, string_length, scratch);
- __ add(index, Immediate(1));
-
- __ cmp(index, array_length_operand);
- __ j(less, &loop_2); // End while (index < length).
- __ jmp(&done);
-
-
- // Long separator case (separator is more than one character).
- __ bind(&long_separator);
-
- __ Move(index, Immediate(0));
- // Jump into the loop after the code that copies the separator, so the first
- // element is not preceded by a separator
- __ jmp(&loop_3_entry);
- // Loop condition: while (index < length).
- __ bind(&loop_3);
- // Each iteration of the loop concatenates one string to the result.
- // Live values in registers:
- // index: which element of the elements array we are adding to the result.
- // result_pos: the position to which we are currently copying characters.
-
- // Copy the separator to the result.
- __ mov(string, separator_operand);
- __ mov(string_length,
- FieldOperand(string, String::kLengthOffset));
- __ shr(string_length, 1);
- __ lea(string,
- FieldOperand(string, SeqOneByteString::kHeaderSize));
- __ CopyBytes(string, result_pos, string_length, scratch);
-
- __ bind(&loop_3_entry);
- // Get string = array[index].
- __ mov(string, FieldOperand(elements, index,
- times_pointer_size,
- FixedArray::kHeaderSize));
- __ mov(string_length,
- FieldOperand(string, String::kLengthOffset));
- __ shr(string_length, 1);
- __ lea(string,
- FieldOperand(string, SeqOneByteString::kHeaderSize));
- __ CopyBytes(string, result_pos, string_length, scratch);
- __ add(index, Immediate(1));
-
- __ cmp(index, array_length_operand);
- __ j(less, &loop_3); // End while (index < length).
- __ jmp(&done);
-
-
- __ bind(&bailout);
- __ mov(result_operand, isolate()->factory()->undefined_value());
- __ bind(&done);
- __ mov(eax, result_operand);
- // Drop temp values from the stack, and restore context register.
- __ add(esp, Immediate(3 * kPointerSize));
-
- __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitDebugIsActive(CallRuntime* expr) {
- DCHECK(expr->arguments()->length() == 0);
- ExternalReference debug_is_active =
- ExternalReference::debug_is_active_address(isolate());
- __ movzx_b(eax, Operand::StaticVariable(debug_is_active));
- __ SmiTag(eax);
- context()->Plug(eax);
-}
-
-
-void FullCodeGenerator::EmitLoadJSRuntimeFunction(CallRuntime* expr) {
- // Push the builtins object as receiver.
- __ mov(eax, GlobalObjectOperand());
- __ push(FieldOperand(eax, GlobalObject::kBuiltinsOffset));
-
- // Load the function from the receiver.
- __ mov(LoadDescriptor::ReceiverRegister(), Operand(esp, 0));
- __ mov(LoadDescriptor::NameRegister(), Immediate(expr->name()));
- __ mov(LoadDescriptor::SlotRegister(),
- Immediate(SmiFromSlot(expr->CallRuntimeFeedbackSlot())));
- CallLoadIC(NOT_INSIDE_TYPEOF);
-}
-
-
-void FullCodeGenerator::EmitCallJSRuntimeFunction(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- int arg_count = args->length();
-
- SetCallPosition(expr, arg_count);
- CallFunctionStub stub(isolate(), arg_count, NO_CALL_FUNCTION_FLAGS);
- __ mov(edi, Operand(esp, (arg_count + 1) * kPointerSize));
- __ CallStub(&stub);
-}
-
-
-void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
- ZoneList<Expression*>* args = expr->arguments();
- int arg_count = args->length();
-
- if (expr->is_jsruntime()) {
- Comment cmnt(masm_, "[ CallRuntime");
- EmitLoadJSRuntimeFunction(expr);
-
- // Push the target function under the receiver.
- __ push(Operand(esp, 0));
- __ mov(Operand(esp, kPointerSize), eax);
-
- // Push the arguments ("left-to-right").
- for (int i = 0; i < arg_count; i++) {
- VisitForStackValue(args->at(i));
- }
-
- PrepareForBailoutForId(expr->CallId(), NO_REGISTERS);
- EmitCallJSRuntimeFunction(expr);
-
- // Restore context register.
- __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
- context()->DropAndPlug(1, eax);
-
- } else {
- const Runtime::Function* function = expr->function();
- switch (function->function_id) {
-#define CALL_INTRINSIC_GENERATOR(Name) \
- case Runtime::kInline##Name: { \
- Comment cmnt(masm_, "[ Inline" #Name); \
- return Emit##Name(expr); \
- }
- FOR_EACH_FULL_CODE_INTRINSIC(CALL_INTRINSIC_GENERATOR)
-#undef CALL_INTRINSIC_GENERATOR
- default: {
- Comment cmnt(masm_, "[ CallRuntime for unhandled intrinsic");
- // Push the arguments ("left-to-right").
- for (int i = 0; i < arg_count; i++) {
- VisitForStackValue(args->at(i));
- }
-
- // Call the C runtime function.
- PrepareForBailoutForId(expr->CallId(), NO_REGISTERS);
- __ CallRuntime(expr->function(), arg_count);
- context()->Plug(eax);
- }
- }
- }
-}
-
-
-void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
- switch (expr->op()) {
- case Token::DELETE: {
- Comment cmnt(masm_, "[ UnaryOperation (DELETE)");
- Property* property = expr->expression()->AsProperty();
- VariableProxy* proxy = expr->expression()->AsVariableProxy();
-
- if (property != NULL) {
- VisitForStackValue(property->obj());
- VisitForStackValue(property->key());
- __ push(Immediate(Smi::FromInt(language_mode())));
- __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION);
- context()->Plug(eax);
- } else if (proxy != NULL) {
- Variable* var = proxy->var();
- // Delete of an unqualified identifier is disallowed in strict mode but
- // "delete this" is allowed.
- bool is_this = var->HasThisName(isolate());
- DCHECK(is_sloppy(language_mode()) || is_this);
- if (var->IsUnallocatedOrGlobalSlot()) {
- __ push(GlobalObjectOperand());
- __ push(Immediate(var->name()));
- __ push(Immediate(Smi::FromInt(SLOPPY)));
- __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION);
- context()->Plug(eax);
- } else if (var->IsStackAllocated() || var->IsContextSlot()) {
- // Result of deleting non-global variables is false. 'this' is
- // not really a variable, though we implement it as one. The
- // subexpression does not have side effects.
- context()->Plug(is_this);
- } else {
- // Non-global variable. Call the runtime to try to delete from the
- // context where the variable was introduced.
- __ push(context_register());
- __ push(Immediate(var->name()));
- __ CallRuntime(Runtime::kDeleteLookupSlot, 2);
- context()->Plug(eax);
- }
- } else {
- // Result of deleting non-property, non-variable reference is true.
- // The subexpression may have side effects.
- VisitForEffect(expr->expression());
- context()->Plug(true);
- }
- break;
- }
-
- case Token::VOID: {
- Comment cmnt(masm_, "[ UnaryOperation (VOID)");
- VisitForEffect(expr->expression());
- context()->Plug(isolate()->factory()->undefined_value());
- break;
- }
-
- case Token::NOT: {
- Comment cmnt(masm_, "[ UnaryOperation (NOT)");
- if (context()->IsEffect()) {
- // Unary NOT has no side effects so it's only necessary to visit the
- // subexpression. Match the optimizing compiler by not branching.
- VisitForEffect(expr->expression());
- } else if (context()->IsTest()) {
- const TestContext* test = TestContext::cast(context());
- // The labels are swapped for the recursive call.
- VisitForControl(expr->expression(),
- test->false_label(),
- test->true_label(),
- test->fall_through());
- context()->Plug(test->true_label(), test->false_label());
- } else {
- // We handle value contexts explicitly rather than simply visiting
- // for control and plugging the control flow into the context,
- // because we need to prepare a pair of extra administrative AST ids
- // for the optimizing compiler.
- DCHECK(context()->IsAccumulatorValue() || context()->IsStackValue());
- Label materialize_true, materialize_false, done;
- VisitForControl(expr->expression(),
- &materialize_false,
- &materialize_true,
- &materialize_true);
- __ bind(&materialize_true);
- PrepareForBailoutForId(expr->MaterializeTrueId(), NO_REGISTERS);
- if (context()->IsAccumulatorValue()) {
- __ mov(eax, isolate()->factory()->true_value());
- } else {
- __ Push(isolate()->factory()->true_value());
- }
- __ jmp(&done, Label::kNear);
- __ bind(&materialize_false);
- PrepareForBailoutForId(expr->MaterializeFalseId(), NO_REGISTERS);
- if (context()->IsAccumulatorValue()) {
- __ mov(eax, isolate()->factory()->false_value());
- } else {
- __ Push(isolate()->factory()->false_value());
- }
- __ bind(&done);
- }
- break;
- }
-
- case Token::TYPEOF: {
- Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)");
- {
- AccumulatorValueContext context(this);
- VisitForTypeofValue(expr->expression());
- }
- __ mov(ebx, eax);
- TypeofStub typeof_stub(isolate());
- __ CallStub(&typeof_stub);
- context()->Plug(eax);
- break;
- }
-
- default:
- UNREACHABLE();
- }
-}
-
-
-void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
- DCHECK(expr->expression()->IsValidReferenceExpressionOrThis());
-
- Comment cmnt(masm_, "[ CountOperation");
-
- Property* prop = expr->expression()->AsProperty();
- LhsKind assign_type = Property::GetAssignType(prop);
-
- // Evaluate expression and get value.
- if (assign_type == VARIABLE) {
- DCHECK(expr->expression()->AsVariableProxy()->var() != NULL);
- AccumulatorValueContext context(this);
- EmitVariableLoad(expr->expression()->AsVariableProxy());
- } else {
- // Reserve space for result of postfix operation.
- if (expr->is_postfix() && !context()->IsEffect()) {
- __ push(Immediate(Smi::FromInt(0)));
- }
- switch (assign_type) {
- case NAMED_PROPERTY: {
- // Put the object both on the stack and in the register.
- VisitForStackValue(prop->obj());
- __ mov(LoadDescriptor::ReceiverRegister(), Operand(esp, 0));
- EmitNamedPropertyLoad(prop);
- break;
- }
-
- case NAMED_SUPER_PROPERTY: {
- VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var());
- VisitForAccumulatorValue(
- prop->obj()->AsSuperPropertyReference()->home_object());
- __ push(result_register());
- __ push(MemOperand(esp, kPointerSize));
- __ push(result_register());
- EmitNamedSuperPropertyLoad(prop);
- break;
- }
-
- case KEYED_SUPER_PROPERTY: {
- VisitForStackValue(prop->obj()->AsSuperPropertyReference()->this_var());
- VisitForStackValue(
- prop->obj()->AsSuperPropertyReference()->home_object());
- VisitForAccumulatorValue(prop->key());
- __ push(result_register());
- __ push(MemOperand(esp, 2 * kPointerSize));
- __ push(MemOperand(esp, 2 * kPointerSize));
- __ push(result_register());
- EmitKeyedSuperPropertyLoad(prop);
- break;
- }
-
- case KEYED_PROPERTY: {
- VisitForStackValue(prop->obj());
- VisitForStackValue(prop->key());
- __ mov(LoadDescriptor::ReceiverRegister(),
- Operand(esp, kPointerSize)); // Object.
- __ mov(LoadDescriptor::NameRegister(), Operand(esp, 0)); // Key.
- EmitKeyedPropertyLoad(prop);
- break;
- }
-
- case VARIABLE:
- UNREACHABLE();
- }
- }
-
- // We need a second deoptimization point after loading the value
- // in case evaluating the property load my have a side effect.
- if (assign_type == VARIABLE) {
- PrepareForBailout(expr->expression(), TOS_REG);
- } else {
- PrepareForBailoutForId(prop->LoadId(), TOS_REG);
- }
-
- // Inline smi case if we are in a loop.
- Label done, stub_call;
- JumpPatchSite patch_site(masm_);
- if (ShouldInlineSmiCase(expr->op())) {
- Label slow;
- patch_site.EmitJumpIfNotSmi(eax, &slow, Label::kNear);
-
- // Save result for postfix expressions.
- if (expr->is_postfix()) {
- if (!context()->IsEffect()) {
- // Save the result on the stack. If we have a named or keyed property
- // we store the result under the receiver that is currently on top
- // of the stack.
- switch (assign_type) {
- case VARIABLE:
- __ push(eax);
- break;
- case NAMED_PROPERTY:
- __ mov(Operand(esp, kPointerSize), eax);
- break;
- case NAMED_SUPER_PROPERTY:
- __ mov(Operand(esp, 2 * kPointerSize), eax);
- break;
- case KEYED_PROPERTY:
- __ mov(Operand(esp, 2 * kPointerSize), eax);
- break;
- case KEYED_SUPER_PROPERTY:
- __ mov(Operand(esp, 3 * kPointerSize), eax);
- break;
- }
- }
- }
-
- if (expr->op() == Token::INC) {
- __ add(eax, Immediate(Smi::FromInt(1)));
- } else {
- __ sub(eax, Immediate(Smi::FromInt(1)));
- }
- __ j(no_overflow, &done, Label::kNear);
- // Call stub. Undo operation first.
- if (expr->op() == Token::INC) {
- __ sub(eax, Immediate(Smi::FromInt(1)));
- } else {
- __ add(eax, Immediate(Smi::FromInt(1)));
- }
- __ jmp(&stub_call, Label::kNear);
- __ bind(&slow);
- }
- if (!is_strong(language_mode())) {
- ToNumberStub convert_stub(isolate());
- __ CallStub(&convert_stub);
- PrepareForBailoutForId(expr->ToNumberId(), TOS_REG);
- }
-
- // Save result for postfix expressions.
- if (expr->is_postfix()) {
- if (!context()->IsEffect()) {
- // Save the result on the stack. If we have a named or keyed property
- // we store the result under the receiver that is currently on top
- // of the stack.
- switch (assign_type) {
- case VARIABLE:
- __ push(eax);
- break;
- case NAMED_PROPERTY:
- __ mov(Operand(esp, kPointerSize), eax);
- break;
- case NAMED_SUPER_PROPERTY:
- __ mov(Operand(esp, 2 * kPointerSize), eax);
- break;
- case KEYED_PROPERTY:
- __ mov(Operand(esp, 2 * kPointerSize), eax);
- break;
- case KEYED_SUPER_PROPERTY:
- __ mov(Operand(esp, 3 * kPointerSize), eax);
- break;
- }
- }
- }
-
- SetExpressionPosition(expr);
-
- // Call stub for +1/-1.
- __ bind(&stub_call);
- __ mov(edx, eax);
- __ mov(eax, Immediate(Smi::FromInt(1)));
- Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), expr->binary_op(),
- strength(language_mode())).code();
- CallIC(code, expr->CountBinOpFeedbackId());
- patch_site.EmitPatchInfo();
- __ bind(&done);
-
- if (is_strong(language_mode())) {
- PrepareForBailoutForId(expr->ToNumberId(), TOS_REG);
- }
- // Store the value returned in eax.
- switch (assign_type) {
- case VARIABLE:
- if (expr->is_postfix()) {
- // Perform the assignment as if via '='.
- { EffectContext context(this);
- EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(),
- Token::ASSIGN, expr->CountSlot());
- PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
- context.Plug(eax);
- }
- // For all contexts except EffectContext We have the result on
- // top of the stack.
- if (!context()->IsEffect()) {
- context()->PlugTOS();
- }
- } else {
- // Perform the assignment as if via '='.
- EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(),
- Token::ASSIGN, expr->CountSlot());
- PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
- context()->Plug(eax);
- }
- break;
- case NAMED_PROPERTY: {
- __ mov(StoreDescriptor::NameRegister(),
- prop->key()->AsLiteral()->value());
- __ pop(StoreDescriptor::ReceiverRegister());
- if (FLAG_vector_stores) {
- EmitLoadStoreICSlot(expr->CountSlot());
- CallStoreIC();
- } else {
- CallStoreIC(expr->CountStoreFeedbackId());
- }
- PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
- if (expr->is_postfix()) {
- if (!context()->IsEffect()) {
- context()->PlugTOS();
- }
- } else {
- context()->Plug(eax);
- }
- break;
- }
- case NAMED_SUPER_PROPERTY: {
- EmitNamedSuperPropertyStore(prop);
- if (expr->is_postfix()) {
- if (!context()->IsEffect()) {
- context()->PlugTOS();
- }
- } else {
- context()->Plug(eax);
- }
- break;
- }
- case KEYED_SUPER_PROPERTY: {
- EmitKeyedSuperPropertyStore(prop);
- if (expr->is_postfix()) {
- if (!context()->IsEffect()) {
- context()->PlugTOS();
- }
- } else {
- context()->Plug(eax);
- }
- break;
- }
- case KEYED_PROPERTY: {
- __ pop(StoreDescriptor::NameRegister());
- __ pop(StoreDescriptor::ReceiverRegister());
- Handle<Code> ic =
- CodeFactory::KeyedStoreIC(isolate(), language_mode()).code();
- if (FLAG_vector_stores) {
- EmitLoadStoreICSlot(expr->CountSlot());
- CallIC(ic);
- } else {
- CallIC(ic, expr->CountStoreFeedbackId());
- }
- PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
- if (expr->is_postfix()) {
- // Result is on the stack
- if (!context()->IsEffect()) {
- context()->PlugTOS();
- }
- } else {
- context()->Plug(eax);
- }
- break;
- }
- }
-}
-
-
-void FullCodeGenerator::EmitLiteralCompareTypeof(Expression* expr,
- Expression* sub_expr,
- Handle<String> check) {
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- { AccumulatorValueContext context(this);
- VisitForTypeofValue(sub_expr);
- }
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
-
- Factory* factory = isolate()->factory();
- if (String::Equals(check, factory->number_string())) {
- __ JumpIfSmi(eax, if_true);
- __ cmp(FieldOperand(eax, HeapObject::kMapOffset),
- isolate()->factory()->heap_number_map());
- Split(equal, if_true, if_false, fall_through);
- } else if (String::Equals(check, factory->string_string())) {
- __ JumpIfSmi(eax, if_false);
- __ CmpObjectType(eax, FIRST_NONSTRING_TYPE, edx);
- __ j(above_equal, if_false);
- // Check for undetectable objects => false.
- __ test_b(FieldOperand(edx, Map::kBitFieldOffset),
- 1 << Map::kIsUndetectable);
- Split(zero, if_true, if_false, fall_through);
- } else if (String::Equals(check, factory->symbol_string())) {
- __ JumpIfSmi(eax, if_false);
- __ CmpObjectType(eax, SYMBOL_TYPE, edx);
- Split(equal, if_true, if_false, fall_through);
- } else if (String::Equals(check, factory->float32x4_string())) {
- __ JumpIfSmi(eax, if_false);
- __ CmpObjectType(eax, FLOAT32X4_TYPE, edx);
- Split(equal, if_true, if_false, fall_through);
- } else if (String::Equals(check, factory->boolean_string())) {
- __ cmp(eax, isolate()->factory()->true_value());
- __ j(equal, if_true);
- __ cmp(eax, isolate()->factory()->false_value());
- Split(equal, if_true, if_false, fall_through);
- } else if (String::Equals(check, factory->undefined_string())) {
- __ cmp(eax, isolate()->factory()->undefined_value());
- __ j(equal, if_true);
- __ JumpIfSmi(eax, if_false);
- // Check for undetectable objects => true.
- __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset));
- __ movzx_b(ecx, FieldOperand(edx, Map::kBitFieldOffset));
- __ test(ecx, Immediate(1 << Map::kIsUndetectable));
- Split(not_zero, if_true, if_false, fall_through);
- } else if (String::Equals(check, factory->function_string())) {
- __ JumpIfSmi(eax, if_false);
- STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2);
- __ CmpObjectType(eax, JS_FUNCTION_TYPE, edx);
- __ j(equal, if_true);
- __ CmpInstanceType(edx, JS_FUNCTION_PROXY_TYPE);
- Split(equal, if_true, if_false, fall_through);
- } else if (String::Equals(check, factory->object_string())) {
- __ JumpIfSmi(eax, if_false);
- __ cmp(eax, isolate()->factory()->null_value());
- __ j(equal, if_true);
- __ CmpObjectType(eax, FIRST_NONCALLABLE_SPEC_OBJECT_TYPE, edx);
- __ j(below, if_false);
- __ CmpInstanceType(edx, LAST_NONCALLABLE_SPEC_OBJECT_TYPE);
- __ j(above, if_false);
- // Check for undetectable objects => false.
- __ test_b(FieldOperand(edx, Map::kBitFieldOffset),
- 1 << Map::kIsUndetectable);
- Split(zero, if_true, if_false, fall_through);
- } else {
- if (if_false != fall_through) __ jmp(if_false);
- }
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
- Comment cmnt(masm_, "[ CompareOperation");
- SetExpressionPosition(expr);
-
- // First we try a fast inlined version of the compare when one of
- // the operands is a literal.
- if (TryLiteralCompare(expr)) return;
-
- // Always perform the comparison for its control flow. Pack the result
- // into the expression's context after the comparison is performed.
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- Token::Value op = expr->op();
- VisitForStackValue(expr->left());
- switch (op) {
- case Token::IN:
- VisitForStackValue(expr->right());
- __ InvokeBuiltin(Builtins::IN, CALL_FUNCTION);
- PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
- __ cmp(eax, isolate()->factory()->true_value());
- Split(equal, if_true, if_false, fall_through);
- break;
-
- case Token::INSTANCEOF: {
- VisitForStackValue(expr->right());
- InstanceofStub stub(isolate(), InstanceofStub::kNoFlags);
- __ CallStub(&stub);
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- __ test(eax, eax);
- // The stub returns 0 for true.
- Split(zero, if_true, if_false, fall_through);
- break;
- }
-
- default: {
- VisitForAccumulatorValue(expr->right());
- Condition cc = CompareIC::ComputeCondition(op);
- __ pop(edx);
-
- bool inline_smi_code = ShouldInlineSmiCase(op);
- JumpPatchSite patch_site(masm_);
- if (inline_smi_code) {
- Label slow_case;
- __ mov(ecx, edx);
- __ or_(ecx, eax);
- patch_site.EmitJumpIfNotSmi(ecx, &slow_case, Label::kNear);
- __ cmp(edx, eax);
- Split(cc, if_true, if_false, NULL);
- __ bind(&slow_case);
- }
-
- Handle<Code> ic = CodeFactory::CompareIC(
- isolate(), op, strength(language_mode())).code();
- CallIC(ic, expr->CompareOperationFeedbackId());
- patch_site.EmitPatchInfo();
-
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
- __ test(eax, eax);
- Split(cc, if_true, if_false, fall_through);
- }
- }
-
- // Convert the result of the comparison into one expected for this
- // expression's context.
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::EmitLiteralCompareNil(CompareOperation* expr,
- Expression* sub_expr,
- NilValue nil) {
- Label materialize_true, materialize_false;
- Label* if_true = NULL;
- Label* if_false = NULL;
- Label* fall_through = NULL;
- context()->PrepareTest(&materialize_true, &materialize_false,
- &if_true, &if_false, &fall_through);
-
- VisitForAccumulatorValue(sub_expr);
- PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
-
- Handle<Object> nil_value = nil == kNullValue
- ? isolate()->factory()->null_value()
- : isolate()->factory()->undefined_value();
- if (expr->op() == Token::EQ_STRICT) {
- __ cmp(eax, nil_value);
- Split(equal, if_true, if_false, fall_through);
- } else {
- Handle<Code> ic = CompareNilICStub::GetUninitialized(isolate(), nil);
- CallIC(ic, expr->CompareOperationFeedbackId());
- __ test(eax, eax);
- Split(not_zero, if_true, if_false, fall_through);
- }
- context()->Plug(if_true, if_false);
-}
-
-
-void FullCodeGenerator::VisitThisFunction(ThisFunction* expr) {
- __ mov(eax, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
- context()->Plug(eax);
-}
-
-
-Register FullCodeGenerator::result_register() {
- return eax;
-}
-
-
-Register FullCodeGenerator::context_register() {
- return esi;
-}
-
-
-void FullCodeGenerator::StoreToFrameField(int frame_offset, Register value) {
- DCHECK_EQ(POINTER_SIZE_ALIGN(frame_offset), frame_offset);
- __ mov(Operand(ebp, frame_offset), value);
-}
-
-
-void FullCodeGenerator::LoadContextField(Register dst, int context_index) {
- __ mov(dst, ContextOperand(esi, context_index));
-}
-
-
-void FullCodeGenerator::PushFunctionArgumentForContextAllocation() {
- Scope* declaration_scope = scope()->DeclarationScope();
- if (declaration_scope->is_script_scope() ||
- declaration_scope->is_module_scope()) {
- // Contexts nested in the native context have a canonical empty function
- // as their closure, not the anonymous closure containing the global
- // code. Pass a smi sentinel and let the runtime look up the empty
- // function.
- __ push(Immediate(Smi::FromInt(0)));
- } else if (declaration_scope->is_eval_scope()) {
- // Contexts nested inside eval code have the same closure as the context
- // calling eval, not the anonymous closure containing the eval code.
- // Fetch it from the context.
- __ push(ContextOperand(esi, Context::CLOSURE_INDEX));
- } else {
- DCHECK(declaration_scope->is_function_scope());
- __ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
- }
-}
-
-
-// ----------------------------------------------------------------------------
-// Non-local control flow support.
-
-void FullCodeGenerator::EnterFinallyBlock() {
- // Cook return address on top of stack (smi encoded Code* delta)
- DCHECK(!result_register().is(edx));
- __ pop(edx);
- __ sub(edx, Immediate(masm_->CodeObject()));
- STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1);
- STATIC_ASSERT(kSmiTag == 0);
- __ SmiTag(edx);
- __ push(edx);
-
- // Store result register while executing finally block.
- __ push(result_register());
-
- // Store pending message while executing finally block.
- ExternalReference pending_message_obj =
- ExternalReference::address_of_pending_message_obj(isolate());
- __ mov(edx, Operand::StaticVariable(pending_message_obj));
- __ push(edx);
-
- ClearPendingMessage();
-}
-
-
-void FullCodeGenerator::ExitFinallyBlock() {
- DCHECK(!result_register().is(edx));
- // Restore pending message from stack.
- __ pop(edx);
- ExternalReference pending_message_obj =
- ExternalReference::address_of_pending_message_obj(isolate());
- __ mov(Operand::StaticVariable(pending_message_obj), edx);
-
- // Restore result register from stack.
- __ pop(result_register());
-
- // Uncook return address.
- __ pop(edx);
- __ SmiUntag(edx);
- __ add(edx, Immediate(masm_->CodeObject()));
- __ jmp(edx);
-}
-
-
-void FullCodeGenerator::ClearPendingMessage() {
- DCHECK(!result_register().is(edx));
- ExternalReference pending_message_obj =
- ExternalReference::address_of_pending_message_obj(isolate());
- __ mov(edx, Immediate(isolate()->factory()->the_hole_value()));
- __ mov(Operand::StaticVariable(pending_message_obj), edx);
-}
-
-
-void FullCodeGenerator::EmitLoadStoreICSlot(FeedbackVectorICSlot slot) {
- DCHECK(FLAG_vector_stores && !slot.IsInvalid());
- __ mov(VectorStoreICTrampolineDescriptor::SlotRegister(),
- Immediate(SmiFromSlot(slot)));
-}
-
-
-#undef __
-
-
-static const byte kJnsInstruction = 0x79;
-static const byte kJnsOffset = 0x11;
-static const byte kNopByteOne = 0x66;
-static const byte kNopByteTwo = 0x90;
-#ifdef DEBUG
-static const byte kCallInstruction = 0xe8;
-#endif
-
-
-void BackEdgeTable::PatchAt(Code* unoptimized_code,
- Address pc,
- BackEdgeState target_state,
- Code* replacement_code) {
- Address call_target_address = pc - kIntSize;
- Address jns_instr_address = call_target_address - 3;
- Address jns_offset_address = call_target_address - 2;
-
- switch (target_state) {
- case INTERRUPT:
- // sub <profiling_counter>, <delta> ;; Not changed
- // jns ok
- // call <interrupt stub>
- // ok:
- *jns_instr_address = kJnsInstruction;
- *jns_offset_address = kJnsOffset;
- break;
- case ON_STACK_REPLACEMENT:
- case OSR_AFTER_STACK_CHECK:
- // sub <profiling_counter>, <delta> ;; Not changed
- // nop
- // nop
- // call <on-stack replacment>
- // ok:
- *jns_instr_address = kNopByteOne;
- *jns_offset_address = kNopByteTwo;
- break;
- }
-
- Assembler::set_target_address_at(call_target_address,
- unoptimized_code,
- replacement_code->entry());
- unoptimized_code->GetHeap()->incremental_marking()->RecordCodeTargetPatch(
- unoptimized_code, call_target_address, replacement_code);
-}
-
-
-BackEdgeTable::BackEdgeState BackEdgeTable::GetBackEdgeState(
- Isolate* isolate,
- Code* unoptimized_code,
- Address pc) {
- Address call_target_address = pc - kIntSize;
- Address jns_instr_address = call_target_address - 3;
- DCHECK_EQ(kCallInstruction, *(call_target_address - 1));
-
- if (*jns_instr_address == kJnsInstruction) {
- DCHECK_EQ(kJnsOffset, *(call_target_address - 2));
- DCHECK_EQ(isolate->builtins()->InterruptCheck()->entry(),
- Assembler::target_address_at(call_target_address,
- unoptimized_code));
- return INTERRUPT;
- }
-
- DCHECK_EQ(kNopByteOne, *jns_instr_address);
- DCHECK_EQ(kNopByteTwo, *(call_target_address - 2));
-
- if (Assembler::target_address_at(call_target_address, unoptimized_code) ==
- isolate->builtins()->OnStackReplacement()->entry()) {
- return ON_STACK_REPLACEMENT;
- }
-
- DCHECK_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(),
- Assembler::target_address_at(call_target_address,
- unoptimized_code));
- return OSR_AFTER_STACK_CHECK;
-}
-
-
-} // namespace internal
-} // namespace v8
-
-#endif // V8_TARGET_ARCH_IA32
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