| // 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_X87 |
| |
| #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/isolate-inl.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-x87.h for its layout. |
| void FullCodeGenerator::Generate() { |
| CompilationInfo* info = info_; |
| handler_table_ = |
| Handle<HandlerTable>::cast(isolate()->factory()->NewFixedArray( |
| HandlerTable::LengthForRange(function()->handler_count()), TENURED)); |
| |
| 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()) { |
| 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. |
| int heap_slots = info->scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS; |
| if (heap_slots > 0) { |
| Comment cmnt(masm_, "[ Allocate context"); |
| bool need_write_barrier = true; |
| // 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 (heap_slots <= FastNewContextStub::kMaximumSlots) { |
| FastNewContextStub stub(isolate(), heap_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(); |
| for (int i = 0; i < num_parameters; i++) { |
| Variable* var = 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); |
| } |
| } |
| } |
| } |
| |
| ArgumentsAccessStub::HasNewTarget has_new_target = |
| IsSubclassConstructor(info->function()->kind()) |
| ? ArgumentsAccessStub::HAS_NEW_TARGET |
| : ArgumentsAccessStub::NO_NEW_TARGET; |
| |
| // 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; |
| if (has_new_target == ArgumentsAccessStub::HAS_NEW_TARGET) { |
| --num_parameters; |
| ++rest_index; |
| } |
| |
| __ lea(edx, |
| Operand(ebp, StandardFrameConstants::kCallerSPOffset + offset)); |
| __ push(edx); |
| __ push(Immediate(Smi::FromInt(num_parameters))); |
| __ push(Immediate(Smi::FromInt(rest_index))); |
| |
| 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, has_new_target); |
| __ 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"); |
| // For named function expressions, declare the function name as a |
| // constant. |
| if (scope()->is_function_scope() && scope()->function() != NULL) { |
| VariableDeclaration* function = scope()->function(); |
| DCHECK(function->proxy()->var()->mode() == CONST || |
| function->proxy()->var()->mode() == CONST_LEGACY); |
| DCHECK(function->proxy()->var()->location() != Variable::UNALLOCATED); |
| VisitVariableDeclaration(function); |
| } |
| 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); |
| #ifdef DEBUG |
| // Add a label for checking the size of the code used for returning. |
| Label check_exit_codesize; |
| masm_->bind(&check_exit_codesize); |
| #endif |
| SetSourcePosition(function()->end_position() - 1); |
| __ RecordJSReturn(); |
| // Do not use the leave instruction here because it is too short to |
| // patch with the code required by the debugger. |
| __ mov(esp, ebp); |
| int no_frame_start = masm_->pc_offset(); |
| __ pop(ebp); |
| |
| int arg_count = info_->scope()->num_parameters() + 1; |
| if (IsSubclassConstructor(info_->function()->kind())) { |
| arg_count++; |
| } |
| int arguments_bytes = arg_count * kPointerSize; |
| __ Ret(arguments_bytes, ecx); |
| // Check that the size of the code used for returning is large enough |
| // for the debugger's requirements. |
| DCHECK(Assembler::kJSReturnSequenceLength <= |
| masm_->SizeOfCodeGeneratedSince(&check_exit_codesize)); |
| info_->AddNoFrameRange(no_frame_start, masm_->pc_offset()); |
| } |
| } |
| |
| |
| void FullCodeGenerator::EffectContext::Plug(Variable* var) const { |
| DCHECK(var->IsStackAllocated() || var->IsContextSlot()); |
| } |
| |
| |
| void FullCodeGenerator::AccumulatorValueContext::Plug(Variable* var) const { |
| DCHECK(var->IsStackAllocated() || var->IsContextSlot()); |
| codegen()->GetVar(result_register(), var); |
| } |
| |
| |
| 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::TestContext::Plug(Variable* var) const { |
| // For simplicity we always test the accumulator register. |
| codegen()->GetVar(result_register(), var); |
| codegen()->PrepareForBailoutBeforeSplit(condition(), false, NULL, NULL); |
| codegen()->DoTest(this); |
| } |
| |
| |
| void FullCodeGenerator::EffectContext::Plug(Heap::RootListIndex index) const { |
| UNREACHABLE(); // Not used on X87. |
| } |
| |
| |
| void FullCodeGenerator::AccumulatorValueContext::Plug( |
| Heap::RootListIndex index) const { |
| UNREACHABLE(); // Not used on X87. |
| } |
| |
| |
| void FullCodeGenerator::StackValueContext::Plug( |
| Heap::RootListIndex index) const { |
| UNREACHABLE(); // Not used on X87. |
| } |
| |
| |
| void FullCodeGenerator::TestContext::Plug(Heap::RootListIndex index) const { |
| UNREACHABLE(); // Not used on X87. |
| } |
| |
| |
| 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::EffectContext::Plug(bool flag) const { |
| } |
| |
| |
| 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 Variable::UNALLOCATED: |
| globals_->Add(variable->name(), zone()); |
| globals_->Add(variable->binding_needs_init() |
| ? isolate()->factory()->the_hole_value() |
| : isolate()->factory()->undefined_value(), zone()); |
| break; |
| |
| case Variable::PARAMETER: |
| case Variable::LOCAL: |
| if (hole_init) { |
| Comment cmnt(masm_, "[ VariableDeclaration"); |
| __ mov(StackOperand(variable), |
| Immediate(isolate()->factory()->the_hole_value())); |
| } |
| break; |
| |
| case Variable::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 Variable::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 Variable::UNALLOCATED: { |
| globals_->Add(variable->name(), zone()); |
| Handle<SharedFunctionInfo> function = |
| Compiler::BuildFunctionInfo(declaration->fun(), script(), info_); |
| // Check for stack-overflow exception. |
| if (function.is_null()) return SetStackOverflow(); |
| globals_->Add(function, zone()); |
| break; |
| } |
| |
| case Variable::PARAMETER: |
| case Variable::LOCAL: { |
| Comment cmnt(masm_, "[ FunctionDeclaration"); |
| VisitForAccumulatorValue(declaration->fun()); |
| __ mov(StackOperand(variable), result_register()); |
| break; |
| } |
| |
| case Variable::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 Variable::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::VisitModuleDeclaration(ModuleDeclaration* declaration) { |
| Variable* variable = declaration->proxy()->var(); |
| ModuleDescriptor* descriptor = declaration->module()->descriptor(); |
| DCHECK(variable->location() == Variable::CONTEXT); |
| DCHECK(descriptor->IsFrozen()); |
| |
| Comment cmnt(masm_, "[ ModuleDeclaration"); |
| EmitDebugCheckDeclarationContext(variable); |
| |
| // Load instance object. |
| __ LoadContext(eax, scope_->ContextChainLength(scope_->ScriptScope())); |
| __ mov(eax, ContextOperand(eax, descriptor->Index())); |
| __ mov(eax, ContextOperand(eax, Context::EXTENSION_INDEX)); |
| |
| // Assign it. |
| __ mov(ContextOperand(esi, variable->index()), eax); |
| // We know that we have written a module, which is not a smi. |
| __ RecordWriteContextSlot(esi, Context::SlotOffset(variable->index()), eax, |
| ecx, kDontSaveFPRegs, EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| PrepareForBailoutForId(declaration->proxy()->id(), NO_REGISTERS); |
| |
| // Traverse into body. |
| Visit(declaration->module()); |
| } |
| |
| |
| void FullCodeGenerator::VisitImportDeclaration(ImportDeclaration* declaration) { |
| VariableProxy* proxy = declaration->proxy(); |
| Variable* variable = proxy->var(); |
| switch (variable->location()) { |
| case Variable::UNALLOCATED: |
| // TODO(rossberg) |
| break; |
| |
| case Variable::CONTEXT: { |
| Comment cmnt(masm_, "[ ImportDeclaration"); |
| EmitDebugCheckDeclarationContext(variable); |
| // TODO(rossberg) |
| break; |
| } |
| |
| case Variable::PARAMETER: |
| case Variable::LOCAL: |
| case Variable::LOOKUP: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitExportDeclaration(ExportDeclaration* declaration) { |
| // TODO(rossberg) |
| } |
| |
| |
| 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); |
| } |
| |
| // Record position before stub call for type feedback. |
| SetSourcePosition(clause->position()); |
| Handle<Code> ic = |
| CodeFactory::CompareIC(isolate(), Token::EQ_STRICT).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"); |
| FeedbackVectorSlot slot = stmt->ForInFeedbackSlot(); |
| |
| SetStatementPosition(stmt); |
| |
| 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. |
| SetExpressionPosition(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); |
| SetExpressionPosition(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. |
| __ InvokeBuiltin(Builtins::FILTER_KEY, CALL_FUNCTION); |
| __ test(eax, eax); |
| __ 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()); |
| 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::VisitVariableProxy(VariableProxy* expr) { |
| Comment cmnt(masm_, "[ VariableProxy"); |
| EmitVariableLoad(expr); |
| } |
| |
| |
| void FullCodeGenerator::EmitLoadHomeObject(SuperReference* expr) { |
| Comment cnmt(masm_, "[ SuperReference "); |
| |
| __ mov(LoadDescriptor::ReceiverRegister(), |
| Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| |
| Handle<Symbol> home_object_symbol(isolate()->heap()->home_object_symbol()); |
| __ mov(LoadDescriptor::NameRegister(), home_object_symbol); |
| |
| if (FLAG_vector_ics) { |
| __ mov(VectorLoadICDescriptor::SlotRegister(), |
| Immediate(SmiFromSlot(expr->HomeObjectFeedbackSlot()))); |
| CallLoadIC(NOT_CONTEXTUAL); |
| } else { |
| CallLoadIC(NOT_CONTEXTUAL, expr->HomeObjectFeedbackId()); |
| } |
| |
| __ cmp(eax, isolate()->factory()->undefined_value()); |
| Label done; |
| __ j(not_equal, &done); |
| __ CallRuntime(Runtime::kThrowNonMethodError, 0); |
| __ bind(&done); |
| } |
| |
| |
| void FullCodeGenerator::EmitSetHomeObjectIfNeeded(Expression* initializer, |
| int offset) { |
| 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)); |
| CallStoreIC(); |
| } |
| } |
| |
| |
| void FullCodeGenerator::EmitLoadGlobalCheckExtensions(VariableProxy* proxy, |
| TypeofState typeof_state, |
| 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 global |
| // load IC call. |
| __ mov(LoadDescriptor::ReceiverRegister(), GlobalObjectOperand()); |
| __ mov(LoadDescriptor::NameRegister(), proxy->var()->name()); |
| if (FLAG_vector_ics) { |
| __ mov(VectorLoadICDescriptor::SlotRegister(), |
| Immediate(SmiFromSlot(proxy->VariableFeedbackSlot()))); |
| } |
| |
| ContextualMode mode = (typeof_state == INSIDE_TYPEOF) |
| ? NOT_CONTEXTUAL |
| : CONTEXTUAL; |
| |
| CallLoadIC(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, |
| TypeofState typeof_state, |
| 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_state, 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::EmitVariableLoad(VariableProxy* proxy) { |
| // Record position before possible IC call. |
| SetSourcePosition(proxy->position()); |
| Variable* var = proxy->var(); |
| |
| // Three cases: global variables, lookup variables, and all other types of |
| // variables. |
| switch (var->location()) { |
| case Variable::UNALLOCATED: { |
| Comment cmnt(masm_, "[ Global variable"); |
| __ mov(LoadDescriptor::ReceiverRegister(), GlobalObjectOperand()); |
| __ mov(LoadDescriptor::NameRegister(), var->name()); |
| if (FLAG_vector_ics) { |
| __ mov(VectorLoadICDescriptor::SlotRegister(), |
| Immediate(SmiFromSlot(proxy->VariableFeedbackSlot()))); |
| } |
| CallGlobalLoadIC(var->name()); |
| context()->Plug(eax); |
| break; |
| } |
| |
| case Variable::PARAMETER: |
| case Variable::LOCAL: |
| case Variable::CONTEXT: { |
| 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 Variable::LOOKUP: { |
| Comment cmnt(masm_, "[ Lookup variable"); |
| Label done, slow; |
| // Generate code for loading from variables potentially shadowed |
| // by eval-introduced variables. |
| EmitDynamicLookupFastCase(proxy, NOT_INSIDE_TYPEOF, &slow, &done); |
| __ bind(&slow); |
| __ push(esi); // Context. |
| __ push(Immediate(var->name())); |
| __ CallRuntime(Runtime::kLoadLookupSlot, 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"); |
| |
| expr->BuildConstantProperties(isolate()); |
| 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; |
| |
| // Mark all computed expressions that are bound to a key that |
| // is shadowed by a later occurrence of the same key. For the |
| // marked expressions, no store code is emitted. |
| expr->CalculateEmitStore(zone()); |
| |
| AccessorTable accessor_table(zone()); |
| int property_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)); |
| 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)); |
| CallStoreIC(); |
| } |
| } else { |
| VisitForEffect(value); |
| } |
| break; |
| } |
| __ push(Operand(esp, 0)); // Duplicate receiver. |
| VisitForStackValue(key); |
| VisitForStackValue(value); |
| if (property->emit_store()) { |
| EmitSetHomeObjectIfNeeded(value, 2); |
| __ 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); |
| EmitAccessor(it->second->setter); |
| EmitSetHomeObjectIfNeeded(it->second->setter, 3); |
| __ 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); |
| |
| 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); |
| } |
| } |
| |
| |
| 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. |
| for (int i = 0; i < length; i++) { |
| Expression* subexpr = subexprs->at(i); |
| // 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 + (i * 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(i))); |
| StoreArrayLiteralElementStub stub(isolate()); |
| __ CallStub(&stub); |
| } |
| |
| PrepareForBailoutForId(expr->GetIdForElement(i), NO_REGISTERS); |
| } |
| |
| if (result_saved) { |
| __ add(esp, Immediate(kPointerSize)); // literal index |
| context()->PlugTOS(); |
| } else { |
| context()->Plug(eax); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitAssignment(Assignment* expr) { |
| DCHECK(expr->target()->IsValidReferenceExpression()); |
| |
| Comment cmnt(masm_, "[ Assignment"); |
| |
| Property* property = expr->target()->AsProperty(); |
| LhsKind assign_type = GetAssignType(property); |
| |
| // Evaluate LHS expression. |
| switch (assign_type) { |
| case VARIABLE: |
| // Nothing to do here. |
| break; |
| case NAMED_SUPER_PROPERTY: |
| VisitForStackValue(property->obj()->AsSuperReference()->this_var()); |
| EmitLoadHomeObject(property->obj()->AsSuperReference()); |
| __ 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()->AsSuperReference()->this_var()); |
| EmitLoadHomeObject(property->obj()->AsSuperReference()); |
| __ Push(result_register()); |
| 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()); |
| |
| SetSourcePosition(expr->position() + 1); |
| 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()); |
| } |
| |
| // Record source position before possible IC call. |
| SetSourcePosition(expr->position()); |
| |
| // Store the value. |
| switch (assign_type) { |
| case VARIABLE: |
| EmitVariableAssignment(expr->target()->AsVariableProxy()->var(), |
| expr->op()); |
| 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"); |
| // 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); |
| __ 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 |
| EnterTryBlock(expr->index(), &l_catch); |
| const int try_block_size = TryCatch::kElementCount * kPointerSize; |
| __ push(eax); // result |
| __ jmp(&l_suspend); |
| __ bind(&l_continuation); |
| __ 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(expr->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(expr->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)); |
| if (FLAG_vector_ics) { |
| __ mov(VectorLoadICDescriptor::SlotRegister(), |
| Immediate(SmiFromSlot(expr->KeyedLoadFeedbackSlot()))); |
| } |
| Handle<Code> ic = CodeFactory::KeyedLoadIC(isolate()).code(); |
| CallIC(ic, TypeFeedbackId::None()); |
| __ mov(edi, eax); |
| __ mov(Operand(esp, 2 * kPointerSize), edi); |
| 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" |
| if (FLAG_vector_ics) { |
| __ mov(VectorLoadICDescriptor::SlotRegister(), |
| Immediate(SmiFromSlot(expr->DoneFeedbackSlot()))); |
| } |
| CallLoadIC(NOT_CONTEXTUAL); // 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" |
| if (FLAG_vector_ics) { |
| __ mov(VectorLoadICDescriptor::SlotRegister(), |
| Immediate(SmiFromSlot(expr->ValueFeedbackSlot()))); |
| } |
| CallLoadIC(NOT_CONTEXTUAL); // 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) { |
| SetSourcePosition(prop->position()); |
| Literal* key = prop->key()->AsLiteral(); |
| DCHECK(!key->value()->IsSmi()); |
| DCHECK(!prop->IsSuperAccess()); |
| |
| __ mov(LoadDescriptor::NameRegister(), Immediate(key->value())); |
| if (FLAG_vector_ics) { |
| __ mov(VectorLoadICDescriptor::SlotRegister(), |
| Immediate(SmiFromSlot(prop->PropertyFeedbackSlot()))); |
| CallLoadIC(NOT_CONTEXTUAL); |
| } else { |
| CallLoadIC(NOT_CONTEXTUAL, prop->PropertyFeedbackId()); |
| } |
| } |
| |
| |
| void FullCodeGenerator::EmitNamedSuperPropertyLoad(Property* prop) { |
| // Stack: receiver, home_object. |
| SetSourcePosition(prop->position()); |
| Literal* key = prop->key()->AsLiteral(); |
| DCHECK(!key->value()->IsSmi()); |
| DCHECK(prop->IsSuperAccess()); |
| |
| __ push(Immediate(key->value())); |
| __ CallRuntime(Runtime::kLoadFromSuper, 3); |
| } |
| |
| |
| void FullCodeGenerator::EmitKeyedPropertyLoad(Property* prop) { |
| SetSourcePosition(prop->position()); |
| Handle<Code> ic = CodeFactory::KeyedLoadIC(isolate()).code(); |
| if (FLAG_vector_ics) { |
| __ mov(VectorLoadICDescriptor::SlotRegister(), |
| Immediate(SmiFromSlot(prop->PropertyFeedbackSlot()))); |
| CallIC(ic); |
| } else { |
| CallIC(ic, prop->PropertyFeedbackId()); |
| } |
| } |
| |
| |
| void FullCodeGenerator::EmitKeyedSuperPropertyLoad(Property* prop) { |
| // Stack: receiver, home_object, key. |
| SetSourcePosition(prop->position()); |
| |
| __ CallRuntime(Runtime::kLoadKeyedFromSuper, 3); |
| } |
| |
| |
| 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).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) { |
| // 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); |
| |
| 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); |
| } |
| |
| |
| void FullCodeGenerator::EmitBinaryOp(BinaryOperation* expr, Token::Value op) { |
| __ pop(edx); |
| Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), op).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) { |
| DCHECK(expr->IsValidReferenceExpression()); |
| |
| Property* prop = expr->AsProperty(); |
| LhsKind assign_type = GetAssignType(prop); |
| |
| switch (assign_type) { |
| case VARIABLE: { |
| Variable* var = expr->AsVariableProxy()->var(); |
| EffectContext context(this); |
| EmitVariableAssignment(var, Token::ASSIGN); |
| 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()); |
| CallStoreIC(); |
| break; |
| } |
| case NAMED_SUPER_PROPERTY: { |
| __ push(eax); |
| VisitForStackValue(prop->obj()->AsSuperReference()->this_var()); |
| EmitLoadHomeObject(prop->obj()->AsSuperReference()); |
| // 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()->AsSuperReference()->this_var()); |
| EmitLoadHomeObject(prop->obj()->AsSuperReference()); |
| __ push(result_register()); |
| 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. |
| 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) { |
| if (var->IsUnallocated()) { |
| // Global var, const, or let. |
| __ mov(StoreDescriptor::NameRegister(), var->name()); |
| __ mov(StoreDescriptor::ReceiverRegister(), GlobalObjectOperand()); |
| CallStoreIC(); |
| |
| } 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_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()); |
| |
| // Record source code position before IC call. |
| SetSourcePosition(expr->position()); |
| __ mov(StoreDescriptor::NameRegister(), prop->key()->AsLiteral()->value()); |
| __ pop(StoreDescriptor::ReceiverRegister()); |
| 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)); |
| // Record source code position before IC call. |
| SetSourcePosition(expr->position()); |
| Handle<Code> ic = |
| CodeFactory::KeyedStoreIC(isolate(), language_mode()).code(); |
| CallIC(ic, expr->AssignmentFeedbackId()); |
| |
| PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::VisitProperty(Property* expr) { |
| Comment cmnt(masm_, "[ Property"); |
| Expression* key = expr->key(); |
| |
| if (key->IsPropertyName()) { |
| if (!expr->IsSuperAccess()) { |
| VisitForAccumulatorValue(expr->obj()); |
| __ Move(LoadDescriptor::ReceiverRegister(), result_register()); |
| EmitNamedPropertyLoad(expr); |
| } else { |
| VisitForStackValue(expr->obj()->AsSuperReference()->this_var()); |
| EmitLoadHomeObject(expr->obj()->AsSuperReference()); |
| __ push(result_register()); |
| 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()->AsSuperReference()->this_var()); |
| EmitLoadHomeObject(expr->obj()->AsSuperReference()); |
| __ push(result_register()); |
| 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) { |
| Expression* callee = expr->expression(); |
| DCHECK(callee->IsProperty()); |
| Property* prop = callee->AsProperty(); |
| DCHECK(prop->IsSuperAccess()); |
| |
| SetSourcePosition(prop->position()); |
| Literal* key = prop->key()->AsLiteral(); |
| DCHECK(!key->value()->IsSmi()); |
| // Load the function from the receiver. |
| SuperReference* super_ref = callee->AsProperty()->obj()->AsSuperReference(); |
| EmitLoadHomeObject(super_ref); |
| __ push(eax); |
| VisitForAccumulatorValue(super_ref->this_var()); |
| __ push(eax); |
| __ push(eax); |
| __ push(Operand(esp, kPointerSize * 2)); |
| __ push(Immediate(key->value())); |
| // Stack here: |
| // - home_object |
| // - this (receiver) |
| // - this (receiver) <-- LoadFromSuper will pop here and below. |
| // - home_object |
| // - key |
| __ CallRuntime(Runtime::kLoadFromSuper, 3); |
| |
| // 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()); |
| |
| SetSourcePosition(prop->position()); |
| // Load the function from the receiver. |
| SuperReference* super_ref = callee->AsProperty()->obj()->AsSuperReference(); |
| EmitLoadHomeObject(super_ref); |
| __ push(eax); |
| VisitForAccumulatorValue(super_ref->this_var()); |
| __ push(eax); |
| __ push(eax); |
| __ push(Operand(esp, kPointerSize * 2)); |
| VisitForStackValue(prop->key()); |
| // Stack here: |
| // - home_object |
| // - this (receiver) |
| // - this (receiver) <-- LoadKeyedFromSuper will pop here and below. |
| // - home_object |
| // - key |
| __ CallRuntime(Runtime::kLoadKeyedFromSuper, 3); |
| |
| // 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(); |
| { PreservePositionScope scope(masm()->positions_recorder()); |
| for (int i = 0; i < arg_count; i++) { |
| VisitForStackValue(args->at(i)); |
| } |
| } |
| |
| // Record source position of the IC call. |
| SetSourcePosition(expr->position()); |
| 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 receiver of the enclosing function. |
| __ push(Operand(ebp, (2 + info_->scope()->num_parameters()) * kPointerSize)); |
| // 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, 6); |
| } |
| |
| |
| void FullCodeGenerator::EmitLoadSuperConstructor() { |
| __ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ CallRuntime(Runtime::kGetPrototype, 1); |
| } |
| |
| |
| 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 and the receiver of the call. |
| // Then we call the resolved function using the given arguments. |
| ZoneList<Expression*>* args = expr->arguments(); |
| int arg_count = args->length(); |
| { PreservePositionScope pos_scope(masm()->positions_recorder()); |
| VisitForStackValue(callee); |
| // Reserved receiver slot. |
| __ push(Immediate(isolate()->factory()->undefined_value())); |
| // 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); |
| |
| // The runtime call returns a pair of values in eax (function) and |
| // edx (receiver). Touch up the stack with the right values. |
| __ mov(Operand(esp, (arg_count + 0) * kPointerSize), edx); |
| __ mov(Operand(esp, (arg_count + 1) * kPointerSize), eax); |
| |
| PrepareForBailoutForId(expr->EvalOrLookupId(), NO_REGISTERS); |
| } |
| // Record source position for debugger. |
| SetSourcePosition(expr->position()); |
| 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). |
| VariableProxy* proxy = callee->AsVariableProxy(); |
| Label slow, done; |
| { PreservePositionScope scope(masm()->positions_recorder()); |
| // Generate code for loading from variables potentially shadowed by |
| // eval-introduced variables. |
| EmitDynamicLookupFastCase(proxy, 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(proxy->name())); |
| __ CallRuntime(Runtime::kLoadLookupSlot, 2); |
| __ push(eax); // Function. |
| __ push(edx); // Receiver. |
| PrepareForBailoutForId(expr->EvalOrLookupId(), 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); |
| } |
| |
| // The receiver is either the global receiver or an object found by |
| // LoadContextSlot. |
| 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 { |
| { |
| PreservePositionScope scope(masm()->positions_recorder()); |
| 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. |
| { PreservePositionScope scope(masm()->positions_recorder()); |
| 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()->IsSuperReference()); |
| 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. |
| SetSourcePosition(expr->position()); |
| |
| // 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) { |
| Variable* new_target_var = scope()->DeclarationScope()->new_target_var(); |
| GetVar(eax, new_target_var); |
| __ push(eax); |
| |
| EmitLoadSuperConstructor(); |
| __ 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. |
| SetSourcePosition(expr->position()); |
| |
| // 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); |
| |
| __ Drop(1); |
| |
| RecordJSReturnSite(expr); |
| |
| SuperReference* super_ref = expr->expression()->AsSuperReference(); |
| Variable* this_var = super_ref->this_var()->var(); |
| GetVar(ecx, this_var); |
| __ cmp(ecx, isolate()->factory()->the_hole_value()); |
| Label uninitialized_this; |
| __ j(equal, &uninitialized_this); |
| __ push(Immediate(this_var->name())); |
| __ CallRuntime(Runtime::kThrowReferenceError, 1); |
| __ bind(&uninitialized_this); |
| |
| EmitVariableAssignment(this_var, Token::INIT_CONST); |
| 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::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::EmitSubString(CallRuntime* expr) { |
| // Load the arguments on the stack and call the stub. |
| SubStringStub stub(isolate()); |
| ZoneList<Expression*>* args = expr->arguments(); |
| DCHECK(args->length() == 3); |
| VisitForStackValue(args->at(0)); |
| VisitForStackValue(args->at(1)); |
| VisitForStackValue(args->at(2)); |
| __ CallStub(&stub); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitRegExpExec(CallRuntime* expr) { |
| // Load the arguments on the stack and call the stub. |
| RegExpExecStub stub(isolate()); |
| ZoneList<Expression*>* args = expr->arguments(); |
| DCHECK(args->length() == 4); |
| VisitForStackValue(args->at(0)); |
| VisitForStackValue(args->at(1)); |
| VisitForStackValue(args->at(2)); |
| VisitForStackValue(args->at(3)); |
| __ CallStub(&stub); |
| 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::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. |
| |
| Label runtime, done, not_date_object; |
| Register object = eax; |
| Register result = eax; |
| Register scratch = ecx; |
| |
| __ JumpIfSmi(object, ¬_date_object); |
| __ CmpObjectType(object, JS_DATE_TYPE, scratch); |
| __ j(not_equal, ¬_date_object); |
| |
| if (index->value() == 0) { |
| __ mov(result, FieldOperand(object, JSDate::kValueOffset)); |
| __ jmp(&done); |
| } else { |
| 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); |
| } |
| __ 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); |
| __ jmp(&done); |
| } |
| |
| __ bind(¬_date_object); |
| __ CallRuntime(Runtime::kThrowNotDateError, 0); |
| __ 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::EmitMathPow(CallRuntime* expr) { |
| // Load the arguments on the stack and call the runtime function. |
| ZoneList<Expression*>* args = expr->arguments(); |
| DCHECK(args->length() == 2); |
| VisitForStackValue(args->at(0)); |
| VisitForStackValue(args->at(1)); |
| |
| __ CallRuntime(Runtime::kMathPowSlow, 2); |
| context()->Plug(eax); |
| } |
| |
| |
| 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::EmitStringCompare(CallRuntime* expr) { |
| ZoneList<Expression*>* args = expr->arguments(); |
| DCHECK_EQ(2, args->length()); |
| |
| VisitForStackValue(args->at(0)); |
| VisitForStackValue(args->at(1)); |
| |
| StringCompareStub stub(isolate()); |
| __ 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) { |
| Variable* new_target_var = scope()->DeclarationScope()->new_target_var(); |
| GetVar(eax, new_target_var); |
| __ push(eax); |
| |
| EmitLoadSuperConstructor(); |
| __ push(result_register()); |
| |
| // Check if the calling frame is an arguments adaptor frame. |
| Label adaptor_frame, args_set_up, runtime; |
| __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset)); |
| __ cmp(ecx, 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(ecx, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ SmiUntag(ecx); |
| |
| // Subtract 1 from arguments count, for new.target. |
| __ sub(ecx, Immediate(1)); |
| __ mov(eax, ecx); |
| __ lea(edx, Operand(edx, ecx, times_pointer_size, |
| StandardFrameConstants::kCallerSPOffset)); |
| Label loop; |
| __ bind(&loop); |
| __ push(Operand(edx, -1 * kPointerSize)); |
| __ sub(edx, Immediate(kPointerSize)); |
| __ dec(ecx); |
| __ 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, ¬_found); |
| |
| __ mov(eax, FixedArrayElementOperand(cache, tmp, 1)); |
| __ jmp(&done); |
| |
| __ bind(¬_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, ¬_size_one_array); |
| __ mov(scratch, FieldOperand(elements, FixedArray::kHeaderSize)); |
| __ mov(result_operand, scratch); |
| __ jmp(&done); |
| |
| __ bind(¬_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::VisitCallRuntime(CallRuntime* expr) { |
| ZoneList<Expression*>* args = expr->arguments(); |
| int arg_count = args->length(); |
| |
| if (expr->is_jsruntime()) { |
| Comment cmnt(masm_, "[ CallRuntime"); |
| // 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())); |
| if (FLAG_vector_ics) { |
| __ mov(VectorLoadICDescriptor::SlotRegister(), |
| Immediate(SmiFromSlot(expr->CallRuntimeFeedbackSlot()))); |
| CallLoadIC(NOT_CONTEXTUAL); |
| } else { |
| CallLoadIC(NOT_CONTEXTUAL, expr->CallRuntimeFeedbackId()); |
| } |
| |
| // 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)); |
| } |
| |
| // Record source position of the IC call. |
| SetSourcePosition(expr->position()); |
| CallFunctionStub stub(isolate(), arg_count, NO_CALL_FUNCTION_FLAGS); |
| __ mov(edi, Operand(esp, (arg_count + 1) * kPointerSize)); |
| __ CallStub(&stub); |
| // 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. |
| __ 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. |
| DCHECK(is_sloppy(language_mode()) || var->is_this()); |
| if (var->IsUnallocated()) { |
| __ 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(var->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)"); |
| { StackValueContext context(this); |
| VisitForTypeofValue(expr->expression()); |
| } |
| __ CallRuntime(Runtime::kTypeof, 1); |
| context()->Plug(eax); |
| break; |
| } |
| |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitCountOperation(CountOperation* expr) { |
| DCHECK(expr->expression()->IsValidReferenceExpression()); |
| |
| Comment cmnt(masm_, "[ CountOperation"); |
| SetSourcePosition(expr->position()); |
| |
| Property* prop = expr->expression()->AsProperty(); |
| LhsKind assign_type = 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()->AsSuperReference()->this_var()); |
| EmitLoadHomeObject(prop->obj()->AsSuperReference()); |
| __ push(result_register()); |
| __ push(MemOperand(esp, kPointerSize)); |
| __ push(result_register()); |
| EmitNamedSuperPropertyLoad(prop); |
| break; |
| } |
| |
| case KEYED_SUPER_PROPERTY: { |
| VisitForStackValue(prop->obj()->AsSuperReference()->this_var()); |
| EmitLoadHomeObject(prop->obj()->AsSuperReference()); |
| __ push(result_register()); |
| 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); |
| } |
| 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; |
| } |
| } |
| } |
| |
| // Record position before stub call. |
| SetSourcePosition(expr->position()); |
| |
| // 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()).code(); |
| CallIC(code, expr->CountBinOpFeedbackId()); |
| patch_site.EmitPatchInfo(); |
| __ bind(&done); |
| |
| // 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); |
| 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); |
| PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| context()->Plug(eax); |
| } |
| break; |
| case NAMED_PROPERTY: { |
| __ mov(StoreDescriptor::NameRegister(), |
| prop->key()->AsLiteral()->value()); |
| __ pop(StoreDescriptor::ReceiverRegister()); |
| 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(); |
| 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::VisitForTypeofValue(Expression* expr) { |
| VariableProxy* proxy = expr->AsVariableProxy(); |
| DCHECK(!context()->IsEffect()); |
| DCHECK(!context()->IsTest()); |
| |
| if (proxy != NULL && proxy->var()->IsUnallocated()) { |
| Comment cmnt(masm_, "[ Global variable"); |
| __ mov(LoadDescriptor::ReceiverRegister(), GlobalObjectOperand()); |
| __ mov(LoadDescriptor::NameRegister(), Immediate(proxy->name())); |
| if (FLAG_vector_ics) { |
| __ mov(VectorLoadICDescriptor::SlotRegister(), |
| Immediate(SmiFromSlot(proxy->VariableFeedbackSlot()))); |
| } |
| // Use a regular load, not a contextual load, to avoid a reference |
| // error. |
| CallLoadIC(NOT_CONTEXTUAL); |
| PrepareForBailout(expr, TOS_REG); |
| context()->Plug(eax); |
| } else if (proxy != NULL && proxy->var()->IsLookupSlot()) { |
| Comment cmnt(masm_, "[ Lookup slot"); |
| Label done, slow; |
| |
| // Generate code for loading from variables potentially shadowed |
| // by eval-introduced variables. |
| EmitDynamicLookupFastCase(proxy, INSIDE_TYPEOF, &slow, &done); |
| |
| __ bind(&slow); |
| __ push(esi); |
| __ push(Immediate(proxy->name())); |
| __ CallRuntime(Runtime::kLoadLookupSlotNoReferenceError, 2); |
| PrepareForBailout(expr, TOS_REG); |
| __ bind(&done); |
| |
| context()->Plug(eax); |
| } else { |
| // This expression cannot throw a reference error at the top level. |
| VisitInDuplicateContext(expr); |
| } |
| } |
| |
| |
| 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->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"); |
| SetSourcePosition(expr->position()); |
| |
| // 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); |
| } |
| |
| // Record position and call the compare IC. |
| SetSourcePosition(expr->position()); |
| Handle<Code> ic = CodeFactory::CompareIC(isolate(), op).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); |
| } |
| |
| |
| 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); |
| } |
| |
| |
| #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 v8::internal |
| |
| #endif // V8_TARGET_ARCH_X87 |
