| // 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. |
| |
| #if V8_TARGET_ARCH_X64 |
| |
| #include "src/ast/compile-time-value.h" |
| #include "src/ast/scopes.h" |
| #include "src/builtins/builtins-constructor.h" |
| #include "src/code-factory.h" |
| #include "src/code-stubs.h" |
| #include "src/codegen.h" |
| #include "src/compilation-info.h" |
| #include "src/compiler.h" |
| #include "src/debug/debug.h" |
| #include "src/full-codegen/full-codegen.h" |
| #include "src/ic/ic.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 near_jump = Label::kFar) { |
| __ testb(reg, Immediate(kSmiTagMask)); |
| EmitJump(not_carry, target, near_jump); // Always taken before patched. |
| } |
| |
| void EmitJumpIfSmi(Register reg, |
| Label* target, |
| Label::Distance near_jump = Label::kFar) { |
| __ testb(reg, Immediate(kSmiTagMask)); |
| EmitJump(carry, target, near_jump); // 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)); |
| __ testl(rax, 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 near_jump) { |
| DCHECK(!patch_site_.is_bound() && !info_emitted_); |
| DCHECK(cc == carry || cc == not_carry); |
| __ bind(&patch_site_); |
| __ j(cc, target, near_jump); |
| } |
| |
| MacroAssembler* masm() { return masm_; } |
| 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 rdi: the JS function object being called (i.e. ourselves) |
| // o rdx: the new target value |
| // o rsi: our context |
| // o rbp: our caller's frame pointer |
| // o rsp: stack pointer (pointing to return address) |
| // |
| // The function builds a JS frame. Please see JavaScriptFrameConstants in |
| // frames-x64.h for its layout. |
| void FullCodeGenerator::Generate() { |
| CompilationInfo* info = info_; |
| DCHECK_EQ(scope(), info->scope()); |
| profiling_counter_ = isolate()->factory()->NewCell( |
| Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate())); |
| SetFunctionPosition(literal()); |
| Comment cmnt(masm_, "[ function compiled by full code generator"); |
| |
| ProfileEntryHookStub::MaybeCallEntryHook(masm_); |
| |
| if (FLAG_debug_code && info->ExpectsJSReceiverAsReceiver()) { |
| StackArgumentsAccessor args(rsp, info->scope()->num_parameters()); |
| __ movp(rcx, args.GetReceiverOperand()); |
| __ AssertNotSmi(rcx); |
| __ CmpObjectType(rcx, FIRST_JS_RECEIVER_TYPE, rcx); |
| __ Assert(above_equal, kSloppyFunctionExpectsJSReceiverReceiver); |
| } |
| |
| // 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->GeneratePreagedPrologue()); |
| |
| // Increment invocation count for the function. |
| { |
| Comment cmnt(masm_, "[ Increment invocation count"); |
| __ movp(rcx, FieldOperand(rdi, JSFunction::kFeedbackVectorOffset)); |
| __ movp(rcx, FieldOperand(rcx, Cell::kValueOffset)); |
| __ SmiAddConstant( |
| FieldOperand(rcx, FeedbackVector::kInvocationCountIndex * kPointerSize + |
| FeedbackVector::kHeaderSize), |
| Smi::FromInt(1)); |
| } |
| |
| { Comment cmnt(masm_, "[ Allocate locals"); |
| int locals_count = info->scope()->num_stack_slots(); |
| OperandStackDepthIncrement(locals_count); |
| if (locals_count == 1) { |
| __ PushRoot(Heap::kUndefinedValueRootIndex); |
| } else if (locals_count > 1) { |
| if (locals_count >= 128) { |
| Label ok; |
| __ movp(rcx, rsp); |
| __ subp(rcx, Immediate(locals_count * kPointerSize)); |
| __ CompareRoot(rcx, Heap::kRealStackLimitRootIndex); |
| __ j(above_equal, &ok, Label::kNear); |
| __ CallRuntime(Runtime::kThrowStackOverflow); |
| __ bind(&ok); |
| } |
| __ LoadRoot(rax, Heap::kUndefinedValueRootIndex); |
| const int kMaxPushes = 32; |
| if (locals_count >= kMaxPushes) { |
| int loop_iterations = locals_count / kMaxPushes; |
| __ movp(rcx, Immediate(loop_iterations)); |
| Label loop_header; |
| __ bind(&loop_header); |
| // Do pushes. |
| for (int i = 0; i < kMaxPushes; i++) { |
| __ Push(rax); |
| } |
| // Continue loop if not done. |
| __ decp(rcx); |
| __ j(not_zero, &loop_header, Label::kNear); |
| } |
| int remaining = locals_count % kMaxPushes; |
| // Emit the remaining pushes. |
| for (int i = 0; i < remaining; i++) { |
| __ Push(rax); |
| } |
| } |
| } |
| |
| bool function_in_register = true; |
| |
| // Possibly allocate a local context. |
| if (info->scope()->NeedsContext()) { |
| Comment cmnt(masm_, "[ Allocate context"); |
| bool need_write_barrier = true; |
| int slots = info->scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS; |
| // Argument to NewContext is the function, which is still in rdi. |
| if (info->scope()->is_script_scope()) { |
| __ Push(rdi); |
| __ Push(info->scope()->scope_info()); |
| __ CallRuntime(Runtime::kNewScriptContext); |
| PrepareForBailoutForId(BailoutId::ScriptContext(), |
| BailoutState::TOS_REGISTER); |
| // The new target value is not used, clobbering is safe. |
| DCHECK_NULL(info->scope()->new_target_var()); |
| } else { |
| if (info->scope()->new_target_var() != nullptr) { |
| __ Push(rdx); // Preserve new target. |
| } |
| if (slots <= |
| ConstructorBuiltinsAssembler::MaximumFunctionContextSlots()) { |
| Callable callable = CodeFactory::FastNewFunctionContext( |
| isolate(), info->scope()->scope_type()); |
| __ Set(FastNewFunctionContextDescriptor::SlotsRegister(), slots); |
| __ Call(callable.code(), RelocInfo::CODE_TARGET); |
| // Result of the FastNewFunctionContext builtin is always in new space. |
| need_write_barrier = false; |
| } else { |
| __ Push(rdi); |
| __ Push(Smi::FromInt(info->scope()->scope_type())); |
| __ CallRuntime(Runtime::kNewFunctionContext); |
| } |
| if (info->scope()->new_target_var() != nullptr) { |
| __ Pop(rdx); // Restore new target. |
| } |
| } |
| function_in_register = false; |
| // Context is returned in rax. It replaces the context passed to us. |
| // It's saved in the stack and kept live in rsi. |
| __ movp(rsi, rax); |
| __ movp(Operand(rbp, StandardFrameConstants::kContextOffset), rax); |
| |
| // Copy any necessary parameters into the context. |
| int num_parameters = info->scope()->num_parameters(); |
| int first_parameter = info->scope()->has_this_declaration() ? -1 : 0; |
| for (int i = first_parameter; i < num_parameters; i++) { |
| Variable* var = |
| (i == -1) ? info->scope()->receiver() : info->scope()->parameter(i); |
| if (var->IsContextSlot()) { |
| int parameter_offset = StandardFrameConstants::kCallerSPOffset + |
| (num_parameters - 1 - i) * kPointerSize; |
| // Load parameter from stack. |
| __ movp(rax, Operand(rbp, parameter_offset)); |
| // Store it in the context. |
| int context_offset = Context::SlotOffset(var->index()); |
| __ movp(Operand(rsi, context_offset), rax); |
| // Update the write barrier. This clobbers rax and rbx. |
| if (need_write_barrier) { |
| __ RecordWriteContextSlot( |
| rsi, context_offset, rax, rbx, kDontSaveFPRegs); |
| } else if (FLAG_debug_code) { |
| Label done; |
| __ JumpIfInNewSpace(rsi, rax, &done, Label::kNear); |
| __ Abort(kExpectedNewSpaceObject); |
| __ bind(&done); |
| } |
| } |
| } |
| } |
| |
| // Register holding this function and new target are both trashed in case we |
| // bailout here. But since that can happen only when new target is not used |
| // and we allocate a context, the value of |function_in_register| is correct. |
| PrepareForBailoutForId(BailoutId::FunctionContext(), |
| BailoutState::NO_REGISTERS); |
| |
| // We don't support new.target and rest parameters here. |
| DCHECK_NULL(info->scope()->new_target_var()); |
| DCHECK_NULL(info->scope()->rest_parameter()); |
| DCHECK_NULL(info->scope()->this_function_var()); |
| |
| // Possibly allocate an arguments object. |
| DCHECK_EQ(scope(), info->scope()); |
| Variable* arguments = info->scope()->arguments(); |
| if (arguments != NULL) { |
| // Arguments object must be allocated after the context object, in |
| // case the "arguments" or ".arguments" variables are in the context. |
| Comment cmnt(masm_, "[ Allocate arguments object"); |
| if (!function_in_register) { |
| __ movp(rdi, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset)); |
| } |
| if (is_strict(language_mode()) || !has_simple_parameters()) { |
| __ call(isolate()->builtins()->FastNewStrictArguments(), |
| RelocInfo::CODE_TARGET); |
| RestoreContext(); |
| } else if (literal()->has_duplicate_parameters()) { |
| __ Push(rdi); |
| __ CallRuntime(Runtime::kNewSloppyArguments_Generic); |
| } else { |
| __ call(isolate()->builtins()->FastNewSloppyArguments(), |
| RelocInfo::CODE_TARGET); |
| RestoreContext(); |
| } |
| |
| SetVar(arguments, rax, rbx, rdx); |
| } |
| |
| if (FLAG_trace) { |
| __ CallRuntime(Runtime::kTraceEnter); |
| } |
| |
| // Visit the declarations and body unless there is an illegal |
| // redeclaration. |
| PrepareForBailoutForId(BailoutId::FunctionEntry(), |
| BailoutState::NO_REGISTERS); |
| { |
| Comment cmnt(masm_, "[ Declarations"); |
| VisitDeclarations(info->scope()->declarations()); |
| } |
| |
| // Assert that the declarations do not use ICs. Otherwise the debugger |
| // won't be able to redirect a PC at an IC to the correct IC in newly |
| // recompiled code. |
| DCHECK_EQ(0, ic_total_count_); |
| |
| { |
| Comment cmnt(masm_, "[ Stack check"); |
| PrepareForBailoutForId(BailoutId::Declarations(), |
| BailoutState::NO_REGISTERS); |
| Label ok; |
| __ CompareRoot(rsp, Heap::kStackLimitRootIndex); |
| __ j(above_equal, &ok, Label::kNear); |
| __ call(isolate()->builtins()->StackCheck(), RelocInfo::CODE_TARGET); |
| __ bind(&ok); |
| } |
| |
| { |
| Comment cmnt(masm_, "[ Body"); |
| DCHECK(loop_depth() == 0); |
| VisitStatements(literal()->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>;"); |
| __ LoadRoot(rax, Heap::kUndefinedValueRootIndex); |
| EmitReturnSequence(); |
| } |
| } |
| |
| |
| void FullCodeGenerator::ClearAccumulator() { |
| __ Set(rax, 0); |
| } |
| |
| |
| void FullCodeGenerator::EmitProfilingCounterDecrement(int delta) { |
| __ Move(rbx, profiling_counter_, RelocInfo::EMBEDDED_OBJECT); |
| __ SmiAddConstant(FieldOperand(rbx, Cell::kValueOffset), |
| Smi::FromInt(-delta)); |
| } |
| |
| |
| void FullCodeGenerator::EmitProfilingCounterReset() { |
| int reset_value = FLAG_interrupt_budget; |
| __ Move(rbx, profiling_counter_, RelocInfo::EMBEDDED_OBJECT); |
| __ Move(kScratchRegister, Smi::FromInt(reset_value)); |
| __ movp(FieldOperand(rbx, Cell::kValueOffset), kScratchRegister); |
| } |
| |
| |
| static const byte kJnsOffset = kPointerSize == kInt64Size ? 0x1d : 0x14; |
| |
| |
| 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); |
| { |
| PredictableCodeSizeScope predictible_code_size_scope(masm_, kJnsOffset); |
| DontEmitDebugCodeScope dont_emit_debug_code_scope(masm_); |
| __ 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(), BailoutState::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(), BailoutState::NO_REGISTERS); |
| } |
| |
| void FullCodeGenerator::EmitProfilingCounterHandlingForReturnSequence( |
| bool is_tail_call) { |
| // 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); |
| // Don't need to save result register if we are going to do a tail call. |
| if (!is_tail_call) { |
| __ Push(rax); |
| } |
| __ call(isolate()->builtins()->InterruptCheck(), RelocInfo::CODE_TARGET); |
| if (!is_tail_call) { |
| __ Pop(rax); |
| } |
| EmitProfilingCounterReset(); |
| __ bind(&ok); |
| } |
| |
| void FullCodeGenerator::EmitReturnSequence() { |
| Comment cmnt(masm_, "[ Return sequence"); |
| if (return_label_.is_bound()) { |
| __ jmp(&return_label_); |
| } else { |
| __ bind(&return_label_); |
| if (FLAG_trace) { |
| __ Push(rax); |
| __ CallRuntime(Runtime::kTraceExit); |
| } |
| EmitProfilingCounterHandlingForReturnSequence(false); |
| |
| SetReturnPosition(literal()); |
| __ leave(); |
| |
| int arg_count = info_->scope()->num_parameters() + 1; |
| int arguments_bytes = arg_count * kPointerSize; |
| __ Ret(arguments_bytes, rcx); |
| } |
| } |
| |
| void FullCodeGenerator::RestoreContext() { |
| __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset)); |
| } |
| |
| void FullCodeGenerator::StackValueContext::Plug(Variable* var) const { |
| DCHECK(var->IsStackAllocated() || var->IsContextSlot()); |
| MemOperand operand = codegen()->VarOperand(var, result_register()); |
| codegen()->PushOperand(operand); |
| } |
| |
| |
| void FullCodeGenerator::EffectContext::Plug(Heap::RootListIndex index) const { |
| } |
| |
| |
| void FullCodeGenerator::AccumulatorValueContext::Plug( |
| Heap::RootListIndex index) const { |
| __ LoadRoot(result_register(), index); |
| } |
| |
| |
| void FullCodeGenerator::StackValueContext::Plug( |
| Heap::RootListIndex index) const { |
| codegen()->OperandStackDepthIncrement(1); |
| __ PushRoot(index); |
| } |
| |
| |
| void FullCodeGenerator::TestContext::Plug(Heap::RootListIndex index) const { |
| codegen()->PrepareForBailoutBeforeSplit(condition(), |
| true, |
| true_label_, |
| false_label_); |
| if (index == Heap::kUndefinedValueRootIndex || |
| index == Heap::kNullValueRootIndex || |
| index == Heap::kFalseValueRootIndex) { |
| if (false_label_ != fall_through_) __ jmp(false_label_); |
| } else if (index == Heap::kTrueValueRootIndex) { |
| if (true_label_ != fall_through_) __ jmp(true_label_); |
| } else { |
| __ LoadRoot(result_register(), index); |
| codegen()->DoTest(this); |
| } |
| } |
| |
| |
| void FullCodeGenerator::EffectContext::Plug(Handle<Object> lit) const { |
| } |
| |
| |
| void FullCodeGenerator::AccumulatorValueContext::Plug( |
| Handle<Object> lit) const { |
| if (lit->IsSmi()) { |
| __ SafeMove(result_register(), Smi::cast(*lit)); |
| } else { |
| __ Move(result_register(), lit); |
| } |
| } |
| |
| |
| void FullCodeGenerator::StackValueContext::Plug(Handle<Object> lit) const { |
| codegen()->OperandStackDepthIncrement(1); |
| if (lit->IsSmi()) { |
| __ SafePush(Smi::cast(*lit)); |
| } else { |
| __ Push(lit); |
| } |
| } |
| |
| |
| void FullCodeGenerator::TestContext::Plug(Handle<Object> lit) const { |
| codegen()->PrepareForBailoutBeforeSplit(condition(), |
| true, |
| true_label_, |
| false_label_); |
| DCHECK(lit->IsNullOrUndefined(isolate()) || !lit->IsUndetectable()); |
| if (lit->IsNullOrUndefined(isolate()) || lit->IsFalse(isolate())) { |
| if (false_label_ != fall_through_) __ jmp(false_label_); |
| } else if (lit->IsTrue(isolate()) || 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. |
| __ Move(result_register(), lit); |
| codegen()->DoTest(this); |
| } |
| } |
| |
| |
| void FullCodeGenerator::StackValueContext::DropAndPlug(int count, |
| Register reg) const { |
| DCHECK(count > 0); |
| if (count > 1) codegen()->DropOperands(count - 1); |
| __ movp(Operand(rsp, 0), reg); |
| } |
| |
| |
| 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); |
| __ Move(result_register(), isolate()->factory()->true_value()); |
| __ jmp(&done, Label::kNear); |
| __ bind(materialize_false); |
| __ Move(result_register(), isolate()->factory()->false_value()); |
| __ bind(&done); |
| } |
| |
| |
| void FullCodeGenerator::StackValueContext::Plug( |
| Label* materialize_true, |
| Label* materialize_false) const { |
| codegen()->OperandStackDepthIncrement(1); |
| Label done; |
| __ bind(materialize_true); |
| __ Push(isolate()->factory()->true_value()); |
| __ jmp(&done, Label::kNear); |
| __ bind(materialize_false); |
| __ Push(isolate()->factory()->false_value()); |
| __ bind(&done); |
| } |
| |
| |
| void FullCodeGenerator::TestContext::Plug(Label* materialize_true, |
| Label* materialize_false) const { |
| DCHECK(materialize_true == true_label_); |
| DCHECK(materialize_false == false_label_); |
| } |
| |
| |
| void FullCodeGenerator::AccumulatorValueContext::Plug(bool flag) const { |
| Heap::RootListIndex value_root_index = |
| flag ? Heap::kTrueValueRootIndex : Heap::kFalseValueRootIndex; |
| __ LoadRoot(result_register(), value_root_index); |
| } |
| |
| |
| void FullCodeGenerator::StackValueContext::Plug(bool flag) const { |
| codegen()->OperandStackDepthIncrement(1); |
| Heap::RootListIndex value_root_index = |
| flag ? Heap::kTrueValueRootIndex : Heap::kFalseValueRootIndex; |
| __ PushRoot(value_root_index); |
| } |
| |
| |
| 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 = ToBooleanICStub::GetUninitialized(isolate()); |
| CallIC(ic, condition->test_id()); |
| __ CompareRoot(result_register(), Heap::kTrueValueRootIndex); |
| Split(equal, 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 += kFPOnStackSize + kPCOnStackSize + |
| (info_->scope()->num_parameters() - 1) * kPointerSize; |
| } else { |
| offset += JavaScriptFrameConstants::kLocal0Offset; |
| } |
| return Operand(rbp, 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); |
| __ movp(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); |
| __ movp(location, src); |
| |
| // Emit the write barrier code if the location is in the heap. |
| if (var->IsContextSlot()) { |
| int offset = Context::SlotOffset(var->index()); |
| __ 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()) return; |
| |
| Label skip; |
| if (should_normalize) __ jmp(&skip, Label::kNear); |
| PrepareForBailout(expr, BailoutState::TOS_REGISTER); |
| if (should_normalize) { |
| __ CompareRoot(rax, Heap::kTrueValueRootIndex); |
| 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 (FLAG_debug_code) { |
| // Check that we're not inside a with or catch context. |
| __ movp(rbx, FieldOperand(rsi, HeapObject::kMapOffset)); |
| __ CompareRoot(rbx, Heap::kWithContextMapRootIndex); |
| __ Check(not_equal, kDeclarationInWithContext); |
| __ CompareRoot(rbx, Heap::kCatchContextMapRootIndex); |
| __ Check(not_equal, kDeclarationInCatchContext); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitVariableDeclaration( |
| VariableDeclaration* declaration) { |
| VariableProxy* proxy = declaration->proxy(); |
| Variable* variable = proxy->var(); |
| switch (variable->location()) { |
| case VariableLocation::UNALLOCATED: { |
| DCHECK(!variable->binding_needs_init()); |
| globals_->Add(variable->name(), zone()); |
| FeedbackSlot slot = proxy->VariableFeedbackSlot(); |
| DCHECK(!slot.IsInvalid()); |
| globals_->Add(handle(Smi::FromInt(slot.ToInt()), isolate()), zone()); |
| globals_->Add(isolate()->factory()->undefined_value(), zone()); |
| globals_->Add(isolate()->factory()->undefined_value(), zone()); |
| break; |
| } |
| case VariableLocation::PARAMETER: |
| case VariableLocation::LOCAL: |
| if (variable->binding_needs_init()) { |
| Comment cmnt(masm_, "[ VariableDeclaration"); |
| __ LoadRoot(kScratchRegister, Heap::kTheHoleValueRootIndex); |
| __ movp(StackOperand(variable), kScratchRegister); |
| } |
| break; |
| |
| case VariableLocation::CONTEXT: |
| if (variable->binding_needs_init()) { |
| Comment cmnt(masm_, "[ VariableDeclaration"); |
| EmitDebugCheckDeclarationContext(variable); |
| __ LoadRoot(kScratchRegister, Heap::kTheHoleValueRootIndex); |
| __ movp(ContextOperand(rsi, variable->index()), kScratchRegister); |
| // No write barrier since the hole value is in old space. |
| PrepareForBailoutForId(proxy->id(), BailoutState::NO_REGISTERS); |
| } |
| break; |
| |
| case VariableLocation::LOOKUP: |
| case VariableLocation::MODULE: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitFunctionDeclaration( |
| FunctionDeclaration* declaration) { |
| VariableProxy* proxy = declaration->proxy(); |
| Variable* variable = proxy->var(); |
| switch (variable->location()) { |
| case VariableLocation::UNALLOCATED: { |
| globals_->Add(variable->name(), zone()); |
| FeedbackSlot slot = proxy->VariableFeedbackSlot(); |
| DCHECK(!slot.IsInvalid()); |
| globals_->Add(handle(Smi::FromInt(slot.ToInt()), isolate()), zone()); |
| |
| // We need the slot where the literals array lives, too. |
| slot = declaration->fun()->LiteralFeedbackSlot(); |
| DCHECK(!slot.IsInvalid()); |
| globals_->Add(handle(Smi::FromInt(slot.ToInt()), isolate()), zone()); |
| |
| Handle<SharedFunctionInfo> function = |
| Compiler::GetSharedFunctionInfo(declaration->fun(), script(), info_); |
| // Check for stack-overflow exception. |
| if (function.is_null()) return SetStackOverflow(); |
| globals_->Add(function, zone()); |
| break; |
| } |
| |
| case VariableLocation::PARAMETER: |
| case VariableLocation::LOCAL: { |
| Comment cmnt(masm_, "[ FunctionDeclaration"); |
| VisitForAccumulatorValue(declaration->fun()); |
| __ movp(StackOperand(variable), result_register()); |
| break; |
| } |
| |
| case VariableLocation::CONTEXT: { |
| Comment cmnt(masm_, "[ FunctionDeclaration"); |
| EmitDebugCheckDeclarationContext(variable); |
| VisitForAccumulatorValue(declaration->fun()); |
| __ movp(ContextOperand(rsi, variable->index()), result_register()); |
| int offset = Context::SlotOffset(variable->index()); |
| // We know that we have written a function, which is not a smi. |
| __ RecordWriteContextSlot(rsi, |
| offset, |
| result_register(), |
| rcx, |
| kDontSaveFPRegs, |
| EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| PrepareForBailoutForId(proxy->id(), BailoutState::NO_REGISTERS); |
| break; |
| } |
| |
| case VariableLocation::LOOKUP: |
| case VariableLocation::MODULE: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) { |
| // Call the runtime to declare the globals. |
| __ Push(pairs); |
| __ Push(Smi::FromInt(DeclareGlobalsFlags())); |
| __ EmitLoadFeedbackVector(rax); |
| __ Push(rax); |
| __ CallRuntime(Runtime::kDeclareGlobals); |
| // 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(), BailoutState::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 '==='. |
| __ movp(rdx, Operand(rsp, 0)); // Switch value. |
| bool inline_smi_code = ShouldInlineSmiCase(Token::EQ_STRICT); |
| JumpPatchSite patch_site(masm_); |
| if (inline_smi_code) { |
| Label slow_case; |
| __ movp(rcx, rdx); |
| __ orp(rcx, rax); |
| patch_site.EmitJumpIfNotSmi(rcx, &slow_case, Label::kNear); |
| |
| __ cmpp(rdx, rax); |
| __ 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. |
| SetExpressionPosition(clause); |
| 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, BailoutState::TOS_REGISTER); |
| __ CompareRoot(rax, Heap::kTrueValueRootIndex); |
| __ j(not_equal, &next_test); |
| __ Drop(1); |
| __ jmp(clause->body_target()); |
| __ bind(&skip); |
| |
| __ testp(rax, rax); |
| __ 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); |
| DropOperands(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(), BailoutState::NO_REGISTERS); |
| VisitStatements(clause->statements()); |
| } |
| |
| __ bind(nested_statement.break_label()); |
| PrepareForBailoutForId(stmt->ExitId(), BailoutState::NO_REGISTERS); |
| } |
| |
| |
| void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) { |
| Comment cmnt(masm_, "[ ForInStatement"); |
| SetStatementPosition(stmt, SKIP_BREAK); |
| |
| FeedbackSlot slot = stmt->ForInFeedbackSlot(); |
| |
| // Get the object to enumerate over. |
| SetExpressionAsStatementPosition(stmt->enumerable()); |
| VisitForAccumulatorValue(stmt->enumerable()); |
| OperandStackDepthIncrement(5); |
| |
| Label loop, exit; |
| Iteration loop_statement(this, stmt); |
| increment_loop_depth(); |
| |
| // If the object is null or undefined, skip over the loop, otherwise convert |
| // it to a JS receiver. See ECMA-262 version 5, section 12.6.4. |
| Label convert, done_convert; |
| __ JumpIfSmi(rax, &convert, Label::kNear); |
| __ CmpObjectType(rax, FIRST_JS_RECEIVER_TYPE, rcx); |
| __ j(above_equal, &done_convert, Label::kNear); |
| __ CompareRoot(rax, Heap::kNullValueRootIndex); |
| __ j(equal, &exit); |
| __ CompareRoot(rax, Heap::kUndefinedValueRootIndex); |
| __ j(equal, &exit); |
| __ bind(&convert); |
| __ Call(isolate()->builtins()->ToObject(), RelocInfo::CODE_TARGET); |
| RestoreContext(); |
| __ bind(&done_convert); |
| PrepareForBailoutForId(stmt->ToObjectId(), BailoutState::TOS_REGISTER); |
| __ Push(rax); |
| |
| // Check cache validity in generated code. If we cannot guarantee cache |
| // validity, call the runtime system to check cache validity or get the |
| // property names in a fixed array. Note: Proxies never have an enum cache, |
| // so will always take the slow path. |
| Label call_runtime; |
| __ CheckEnumCache(&call_runtime); |
| |
| // The enum cache is valid. Load the map of the object being |
| // iterated over and use the cache for the iteration. |
| Label use_cache; |
| __ movp(rax, FieldOperand(rax, HeapObject::kMapOffset)); |
| __ jmp(&use_cache, Label::kNear); |
| |
| // Get the set of properties to enumerate. |
| __ bind(&call_runtime); |
| __ Push(rax); // Duplicate the enumerable object on the stack. |
| __ CallRuntime(Runtime::kForInEnumerate); |
| PrepareForBailoutForId(stmt->EnumId(), BailoutState::TOS_REGISTER); |
| |
| // If we got a map from the runtime call, we can do a fast |
| // modification check. Otherwise, we got a fixed array, and we have |
| // to do a slow check. |
| Label fixed_array; |
| __ CompareRoot(FieldOperand(rax, HeapObject::kMapOffset), |
| Heap::kMetaMapRootIndex); |
| __ j(not_equal, &fixed_array); |
| |
| // We got a map in register rax. Get the enumeration cache from it. |
| __ bind(&use_cache); |
| |
| Label no_descriptors; |
| |
| __ EnumLength(rdx, rax); |
| __ Cmp(rdx, Smi::kZero); |
| __ j(equal, &no_descriptors); |
| |
| __ LoadInstanceDescriptors(rax, rcx); |
| __ movp(rcx, FieldOperand(rcx, DescriptorArray::kEnumCacheOffset)); |
| __ movp(rcx, FieldOperand(rcx, DescriptorArray::kEnumCacheBridgeCacheOffset)); |
| |
| // Set up the four remaining stack slots. |
| __ Push(rax); // Map. |
| __ Push(rcx); // Enumeration cache. |
| __ Push(rdx); // Number of valid entries for the map in the enum cache. |
| __ Push(Smi::kZero); // Initial index. |
| __ jmp(&loop); |
| |
| __ bind(&no_descriptors); |
| __ addp(rsp, Immediate(kPointerSize)); |
| __ jmp(&exit); |
| |
| // We got a fixed array in register rax. Iterate through that. |
| __ bind(&fixed_array); |
| |
| __ movp(rcx, Operand(rsp, 0 * kPointerSize)); // Get enumerated object |
| __ Push(Smi::FromInt(1)); // Smi(1) indicates slow check |
| __ Push(rax); // Array |
| __ movp(rax, FieldOperand(rax, FixedArray::kLengthOffset)); |
| __ Push(rax); // Fixed array length (as smi). |
| PrepareForBailoutForId(stmt->PrepareId(), BailoutState::NO_REGISTERS); |
| __ Push(Smi::kZero); // Initial index. |
| |
| // Generate code for doing the condition check. |
| __ bind(&loop); |
| SetExpressionAsStatementPosition(stmt->each()); |
| |
| __ movp(rax, Operand(rsp, 0 * kPointerSize)); // Get the current index. |
| __ cmpp(rax, Operand(rsp, 1 * kPointerSize)); // Compare to the array length. |
| __ j(above_equal, loop_statement.break_label()); |
| |
| // Get the current entry of the array into register rax. |
| __ movp(rbx, Operand(rsp, 2 * kPointerSize)); |
| SmiIndex index = masm()->SmiToIndex(rax, rax, kPointerSizeLog2); |
| __ movp(rax, |
| FieldOperand(rbx, index.reg, index.scale, FixedArray::kHeaderSize)); |
| |
| // Get the expected map from the stack or a smi in the |
| // permanent slow case into register rdx. |
| __ movp(rdx, Operand(rsp, 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; |
| __ movp(rbx, Operand(rsp, 4 * kPointerSize)); |
| __ cmpp(rdx, FieldOperand(rbx, HeapObject::kMapOffset)); |
| __ j(equal, &update_each, Label::kNear); |
| |
| // We need to filter the key, record slow-path here. |
| int const vector_index = SmiFromSlot(slot)->value(); |
| __ EmitLoadFeedbackVector(rdx); |
| __ Move(FieldOperand(rdx, FixedArray::OffsetOfElementAt(vector_index)), |
| FeedbackVector::MegamorphicSentinel(isolate())); |
| |
| // rax contains the key. The receiver in rbx is the second argument to |
| // ForInFilter. ForInFilter returns undefined if the receiver doesn't |
| // have the key or returns the name-converted key. |
| __ Call(isolate()->builtins()->ForInFilter(), RelocInfo::CODE_TARGET); |
| RestoreContext(); |
| PrepareForBailoutForId(stmt->FilterId(), BailoutState::TOS_REGISTER); |
| __ JumpIfRoot(result_register(), Heap::kUndefinedValueRootIndex, |
| loop_statement.continue_label()); |
| |
| // Update the 'each' property or variable from the possibly filtered |
| // entry in register rax. |
| __ bind(&update_each); |
| // Perform the assignment as if via '='. |
| { EffectContext context(this); |
| EmitAssignment(stmt->each(), stmt->EachFeedbackSlot()); |
| PrepareForBailoutForId(stmt->AssignmentId(), BailoutState::NO_REGISTERS); |
| } |
| |
| // Both Crankshaft and Turbofan expect BodyId to be right before stmt->body(). |
| PrepareForBailoutForId(stmt->BodyId(), BailoutState::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()); |
| PrepareForBailoutForId(stmt->IncrementId(), BailoutState::NO_REGISTERS); |
| __ SmiAddConstant(Operand(rsp, 0 * kPointerSize), Smi::FromInt(1)); |
| |
| EmitBackEdgeBookkeeping(stmt, &loop); |
| __ jmp(&loop); |
| |
| // Remove the pointers stored on the stack. |
| __ bind(loop_statement.break_label()); |
| DropOperands(5); |
| |
| // Exit and decrement the loop depth. |
| PrepareForBailoutForId(stmt->ExitId(), BailoutState::NO_REGISTERS); |
| __ bind(&exit); |
| decrement_loop_depth(); |
| } |
| |
| void FullCodeGenerator::EmitSetHomeObject(Expression* initializer, int offset, |
| FeedbackSlot slot) { |
| DCHECK(NeedsHomeObject(initializer)); |
| __ movp(StoreDescriptor::ReceiverRegister(), Operand(rsp, 0)); |
| __ movp(StoreDescriptor::ValueRegister(), |
| Operand(rsp, offset * kPointerSize)); |
| CallStoreIC(slot, isolate()->factory()->home_object_symbol()); |
| } |
| |
| void FullCodeGenerator::EmitSetHomeObjectAccumulator(Expression* initializer, |
| int offset, |
| FeedbackSlot slot) { |
| DCHECK(NeedsHomeObject(initializer)); |
| __ movp(StoreDescriptor::ReceiverRegister(), rax); |
| __ movp(StoreDescriptor::ValueRegister(), |
| Operand(rsp, offset * kPointerSize)); |
| CallStoreIC(slot, isolate()->factory()->home_object_symbol()); |
| } |
| |
| void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy, |
| TypeofMode typeof_mode) { |
| // Record position before possible IC call. |
| SetExpressionPosition(proxy); |
| PrepareForBailoutForId(proxy->BeforeId(), BailoutState::NO_REGISTERS); |
| Variable* var = proxy->var(); |
| |
| // Two cases: global variable, and all other types of variables. |
| switch (var->location()) { |
| case VariableLocation::UNALLOCATED: { |
| Comment cmnt(masm_, "[ Global variable"); |
| EmitGlobalVariableLoad(proxy, typeof_mode); |
| context()->Plug(rax); |
| break; |
| } |
| |
| case VariableLocation::PARAMETER: |
| case VariableLocation::LOCAL: |
| case VariableLocation::CONTEXT: { |
| DCHECK_EQ(NOT_INSIDE_TYPEOF, typeof_mode); |
| Comment cmnt(masm_, var->IsContextSlot() ? "[ Context slot" |
| : "[ Stack slot"); |
| if (proxy->hole_check_mode() == HoleCheckMode::kRequired) { |
| // Throw a reference error when using an uninitialized let/const |
| // binding in harmony mode. |
| DCHECK(IsLexicalVariableMode(var->mode())); |
| Label done; |
| GetVar(rax, var); |
| __ CompareRoot(rax, Heap::kTheHoleValueRootIndex); |
| __ j(not_equal, &done, Label::kNear); |
| __ Push(var->name()); |
| __ CallRuntime(Runtime::kThrowReferenceError); |
| __ bind(&done); |
| context()->Plug(rax); |
| break; |
| } |
| context()->Plug(var); |
| break; |
| } |
| |
| case VariableLocation::LOOKUP: |
| case VariableLocation::MODULE: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void FullCodeGenerator::EmitAccessor(ObjectLiteralProperty* property) { |
| Expression* expression = (property == NULL) ? NULL : property->value(); |
| if (expression == NULL) { |
| OperandStackDepthIncrement(1); |
| __ PushRoot(Heap::kNullValueRootIndex); |
| } else { |
| VisitForStackValue(expression); |
| if (NeedsHomeObject(expression)) { |
| DCHECK(property->kind() == ObjectLiteral::Property::GETTER || |
| property->kind() == ObjectLiteral::Property::SETTER); |
| int offset = property->kind() == ObjectLiteral::Property::GETTER ? 2 : 3; |
| EmitSetHomeObject(expression, offset, property->GetSlot()); |
| } |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) { |
| Comment cmnt(masm_, "[ ObjectLiteral"); |
| |
| Handle<BoilerplateDescription> constant_properties = |
| expr->GetOrBuildConstantProperties(isolate()); |
| int flags = expr->ComputeFlags(); |
| if (MustCreateObjectLiteralWithRuntime(expr)) { |
| __ Push(Operand(rbp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ Push(SmiFromSlot(expr->literal_slot())); |
| __ Push(constant_properties); |
| __ Push(Smi::FromInt(flags)); |
| __ CallRuntime(Runtime::kCreateObjectLiteral); |
| } else { |
| __ movp(rax, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ Move(rbx, SmiFromSlot(expr->literal_slot())); |
| __ Move(rcx, constant_properties); |
| __ Move(rdx, Smi::FromInt(flags)); |
| Callable callable = CodeFactory::FastCloneShallowObject( |
| isolate(), expr->properties_count()); |
| __ Call(callable.code(), RelocInfo::CODE_TARGET); |
| RestoreContext(); |
| } |
| PrepareForBailoutForId(expr->CreateLiteralId(), BailoutState::TOS_REGISTER); |
| |
| // If result_saved is true the result is on top of the stack. If |
| // result_saved is false the result is in rax. |
| bool result_saved = false; |
| |
| AccessorTable accessor_table(zone()); |
| for (int i = 0; i < expr->properties()->length(); i++) { |
| ObjectLiteral::Property* property = expr->properties()->at(i); |
| DCHECK(!property->is_computed_name()); |
| if (property->IsCompileTimeValue()) continue; |
| |
| Literal* key = property->key()->AsLiteral(); |
| Expression* value = property->value(); |
| if (!result_saved) { |
| PushOperand(rax); // Save result on the stack |
| result_saved = true; |
| } |
| switch (property->kind()) { |
| case ObjectLiteral::Property::SPREAD: |
| 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->IsStringLiteral()) { |
| DCHECK(key->IsPropertyName()); |
| if (property->emit_store()) { |
| VisitForAccumulatorValue(value); |
| DCHECK(StoreDescriptor::ValueRegister().is(rax)); |
| __ movp(StoreDescriptor::ReceiverRegister(), Operand(rsp, 0)); |
| CallStoreIC(property->GetSlot(0), key->value()); |
| PrepareForBailoutForId(key->id(), BailoutState::NO_REGISTERS); |
| |
| if (NeedsHomeObject(value)) { |
| EmitSetHomeObjectAccumulator(value, 0, property->GetSlot(1)); |
| } |
| } else { |
| VisitForEffect(value); |
| } |
| break; |
| } |
| PushOperand(Operand(rsp, 0)); // Duplicate receiver. |
| VisitForStackValue(key); |
| VisitForStackValue(value); |
| if (property->emit_store()) { |
| if (NeedsHomeObject(value)) { |
| EmitSetHomeObject(value, 2, property->GetSlot()); |
| } |
| PushOperand(Smi::FromInt(SLOPPY)); // Language mode |
| CallRuntimeWithOperands(Runtime::kSetProperty); |
| } else { |
| DropOperands(3); |
| } |
| break; |
| case ObjectLiteral::Property::PROTOTYPE: |
| PushOperand(Operand(rsp, 0)); // Duplicate receiver. |
| VisitForStackValue(value); |
| DCHECK(property->emit_store()); |
| CallRuntimeWithOperands(Runtime::kInternalSetPrototype); |
| PrepareForBailoutForId(expr->GetIdForPropertySet(i), |
| BailoutState::NO_REGISTERS); |
| break; |
| case ObjectLiteral::Property::GETTER: |
| if (property->emit_store()) { |
| AccessorTable::Iterator it = accessor_table.lookup(key); |
| it->second->bailout_id = expr->GetIdForPropertySet(i); |
| it->second->getter = property; |
| } |
| break; |
| case ObjectLiteral::Property::SETTER: |
| if (property->emit_store()) { |
| AccessorTable::Iterator it = accessor_table.lookup(key); |
| it->second->bailout_id = expr->GetIdForPropertySet(i); |
| it->second->setter = property; |
| } |
| 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) { |
| PushOperand(Operand(rsp, 0)); // Duplicate receiver. |
| VisitForStackValue(it->first); |
| EmitAccessor(it->second->getter); |
| EmitAccessor(it->second->setter); |
| PushOperand(Smi::FromInt(NONE)); |
| CallRuntimeWithOperands(Runtime::kDefineAccessorPropertyUnchecked); |
| PrepareForBailoutForId(it->second->bailout_id, BailoutState::NO_REGISTERS); |
| } |
| |
| if (result_saved) { |
| context()->PlugTOS(); |
| } else { |
| context()->Plug(rax); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) { |
| Comment cmnt(masm_, "[ ArrayLiteral"); |
| |
| Handle<ConstantElementsPair> constant_elements = |
| expr->GetOrBuildConstantElements(isolate()); |
| 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)) { |
| __ Push(Operand(rbp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ Push(SmiFromSlot(expr->literal_slot())); |
| __ Push(constant_elements); |
| __ Push(Smi::FromInt(expr->ComputeFlags())); |
| __ CallRuntime(Runtime::kCreateArrayLiteral); |
| } else { |
| __ movp(rax, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ Move(rbx, SmiFromSlot(expr->literal_slot())); |
| __ Move(rcx, constant_elements); |
| Callable callable = |
| CodeFactory::FastCloneShallowArray(isolate(), allocation_site_mode); |
| __ Call(callable.code(), RelocInfo::CODE_TARGET); |
| RestoreContext(); |
| } |
| PrepareForBailoutForId(expr->CreateLiteralId(), BailoutState::TOS_REGISTER); |
| |
| 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 array_index = 0; array_index < length; array_index++) { |
| Expression* subexpr = subexprs->at(array_index); |
| DCHECK(!subexpr->IsSpread()); |
| |
| // 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) { |
| PushOperand(rax); // array literal |
| result_saved = true; |
| } |
| VisitForAccumulatorValue(subexpr); |
| |
| __ Move(StoreDescriptor::NameRegister(), Smi::FromInt(array_index)); |
| __ movp(StoreDescriptor::ReceiverRegister(), Operand(rsp, 0)); |
| CallKeyedStoreIC(expr->LiteralFeedbackSlot()); |
| |
| PrepareForBailoutForId(expr->GetIdForElement(array_index), |
| BailoutState::NO_REGISTERS); |
| } |
| |
| if (result_saved) { |
| context()->PlugTOS(); |
| } else { |
| context()->Plug(rax); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitAssignment(Assignment* expr) { |
| DCHECK(expr->target()->IsValidReferenceExpressionOrThis()); |
| |
| Comment cmnt(masm_, "[ Assignment"); |
| |
| Property* property = expr->target()->AsProperty(); |
| LhsKind assign_type = Property::GetAssignType(property); |
| |
| // Evaluate LHS expression. |
| switch (assign_type) { |
| case VARIABLE: |
| // Nothing to do here. |
| break; |
| case NAMED_PROPERTY: |
| if (expr->is_compound()) { |
| // We need the receiver both on the stack and in the register. |
| VisitForStackValue(property->obj()); |
| __ movp(LoadDescriptor::ReceiverRegister(), Operand(rsp, 0)); |
| } else { |
| VisitForStackValue(property->obj()); |
| } |
| break; |
| case KEYED_PROPERTY: { |
| if (expr->is_compound()) { |
| VisitForStackValue(property->obj()); |
| VisitForStackValue(property->key()); |
| __ movp(LoadDescriptor::ReceiverRegister(), Operand(rsp, kPointerSize)); |
| __ movp(LoadDescriptor::NameRegister(), Operand(rsp, 0)); |
| } else { |
| VisitForStackValue(property->obj()); |
| VisitForStackValue(property->key()); |
| } |
| break; |
| } |
| case NAMED_SUPER_PROPERTY: |
| case KEYED_SUPER_PROPERTY: |
| UNREACHABLE(); |
| break; |
| } |
| |
| // For compound assignments we need another deoptimization point after the |
| // variable/property load. |
| if (expr->is_compound()) { |
| { AccumulatorValueContext context(this); |
| switch (assign_type) { |
| case VARIABLE: |
| EmitVariableLoad(expr->target()->AsVariableProxy()); |
| PrepareForBailout(expr->target(), BailoutState::TOS_REGISTER); |
| break; |
| case NAMED_PROPERTY: |
| EmitNamedPropertyLoad(property); |
| PrepareForBailoutForId(property->LoadId(), |
| BailoutState::TOS_REGISTER); |
| break; |
| case KEYED_PROPERTY: |
| EmitKeyedPropertyLoad(property); |
| PrepareForBailoutForId(property->LoadId(), |
| BailoutState::TOS_REGISTER); |
| break; |
| case NAMED_SUPER_PROPERTY: |
| case KEYED_SUPER_PROPERTY: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| |
| Token::Value op = expr->binary_op(); |
| PushOperand(rax); // Left operand goes on the stack. |
| VisitForAccumulatorValue(expr->value()); |
| |
| AccumulatorValueContext context(this); |
| 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(), BailoutState::TOS_REGISTER); |
| } else { |
| VisitForAccumulatorValue(expr->value()); |
| } |
| |
| SetExpressionPosition(expr); |
| |
| // Store the value. |
| switch (assign_type) { |
| case VARIABLE: { |
| VariableProxy* proxy = expr->target()->AsVariableProxy(); |
| EmitVariableAssignment(proxy->var(), expr->op(), expr->AssignmentSlot(), |
| proxy->hole_check_mode()); |
| PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER); |
| context()->Plug(rax); |
| break; |
| } |
| case NAMED_PROPERTY: |
| EmitNamedPropertyAssignment(expr); |
| break; |
| case KEYED_PROPERTY: |
| EmitKeyedPropertyAssignment(expr); |
| break; |
| case NAMED_SUPER_PROPERTY: |
| case KEYED_SUPER_PROPERTY: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitYield(Yield* expr) { |
| // Resumable functions are not supported. |
| UNREACHABLE(); |
| } |
| |
| void FullCodeGenerator::PushOperand(MemOperand operand) { |
| OperandStackDepthIncrement(1); |
| __ Push(operand); |
| } |
| |
| void FullCodeGenerator::EmitOperandStackDepthCheck() { |
| if (FLAG_debug_code) { |
| int expected_diff = StandardFrameConstants::kFixedFrameSizeFromFp + |
| operand_stack_depth_ * kPointerSize; |
| __ movp(rax, rbp); |
| __ subp(rax, rsp); |
| __ cmpp(rax, Immediate(expected_diff)); |
| __ Assert(equal, kUnexpectedStackDepth); |
| } |
| } |
| |
| void FullCodeGenerator::EmitCreateIteratorResult(bool done) { |
| Label allocate, done_allocate; |
| |
| __ Allocate(JSIteratorResult::kSize, rax, rcx, rdx, &allocate, |
| NO_ALLOCATION_FLAGS); |
| __ jmp(&done_allocate, Label::kNear); |
| |
| __ bind(&allocate); |
| __ Push(Smi::FromInt(JSIteratorResult::kSize)); |
| __ CallRuntime(Runtime::kAllocateInNewSpace); |
| |
| __ bind(&done_allocate); |
| __ LoadNativeContextSlot(Context::ITERATOR_RESULT_MAP_INDEX, rbx); |
| __ movp(FieldOperand(rax, HeapObject::kMapOffset), rbx); |
| __ LoadRoot(rbx, Heap::kEmptyFixedArrayRootIndex); |
| __ movp(FieldOperand(rax, JSObject::kPropertiesOffset), rbx); |
| __ movp(FieldOperand(rax, JSObject::kElementsOffset), rbx); |
| __ Pop(FieldOperand(rax, JSIteratorResult::kValueOffset)); |
| __ LoadRoot(FieldOperand(rax, JSIteratorResult::kDoneOffset), |
| done ? Heap::kTrueValueRootIndex : Heap::kFalseValueRootIndex); |
| STATIC_ASSERT(JSIteratorResult::kSize == 5 * kPointerSize); |
| OperandStackDepthDecrement(1); |
| } |
| |
| |
| 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 (popped into rdx). Right operand is in rax but moved into |
| // rcx to make the shifts easier. |
| Label done, stub_call, smi_case; |
| PopOperand(rdx); |
| __ movp(rcx, rax); |
| __ orp(rax, rdx); |
| JumpPatchSite patch_site(masm_); |
| patch_site.EmitJumpIfSmi(rax, &smi_case, Label::kNear); |
| |
| __ bind(&stub_call); |
| __ movp(rax, rcx); |
| Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), op).code(); |
| CallIC(code, expr->BinaryOperationFeedbackId()); |
| patch_site.EmitPatchInfo(); |
| __ jmp(&done, Label::kNear); |
| |
| __ bind(&smi_case); |
| switch (op) { |
| case Token::SAR: |
| __ SmiShiftArithmeticRight(rax, rdx, rcx); |
| break; |
| case Token::SHL: |
| __ SmiShiftLeft(rax, rdx, rcx, &stub_call); |
| break; |
| case Token::SHR: |
| __ SmiShiftLogicalRight(rax, rdx, rcx, &stub_call); |
| break; |
| case Token::ADD: |
| __ SmiAdd(rax, rdx, rcx, &stub_call); |
| break; |
| case Token::SUB: |
| __ SmiSub(rax, rdx, rcx, &stub_call); |
| break; |
| case Token::MUL: |
| __ SmiMul(rax, rdx, rcx, &stub_call); |
| break; |
| case Token::BIT_OR: |
| __ SmiOr(rax, rdx, rcx); |
| break; |
| case Token::BIT_AND: |
| __ SmiAnd(rax, rdx, rcx); |
| break; |
| case Token::BIT_XOR: |
| __ SmiXor(rax, rdx, rcx); |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| |
| __ bind(&done); |
| context()->Plug(rax); |
| } |
| |
| |
| void FullCodeGenerator::EmitBinaryOp(BinaryOperation* expr, Token::Value op) { |
| PopOperand(rdx); |
| 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(rax); |
| } |
| |
| void FullCodeGenerator::EmitAssignment(Expression* expr, FeedbackSlot slot) { |
| DCHECK(expr->IsValidReferenceExpressionOrThis()); |
| |
| Property* prop = expr->AsProperty(); |
| LhsKind assign_type = Property::GetAssignType(prop); |
| |
| switch (assign_type) { |
| case VARIABLE: { |
| VariableProxy* proxy = expr->AsVariableProxy(); |
| EffectContext context(this); |
| EmitVariableAssignment(proxy->var(), Token::ASSIGN, slot, |
| proxy->hole_check_mode()); |
| break; |
| } |
| case NAMED_PROPERTY: { |
| PushOperand(rax); // Preserve value. |
| VisitForAccumulatorValue(prop->obj()); |
| __ Move(StoreDescriptor::ReceiverRegister(), rax); |
| PopOperand(StoreDescriptor::ValueRegister()); // Restore value. |
| CallStoreIC(slot, prop->key()->AsLiteral()->value()); |
| break; |
| } |
| case KEYED_PROPERTY: { |
| PushOperand(rax); // Preserve value. |
| VisitForStackValue(prop->obj()); |
| VisitForAccumulatorValue(prop->key()); |
| __ Move(StoreDescriptor::NameRegister(), rax); |
| PopOperand(StoreDescriptor::ReceiverRegister()); |
| PopOperand(StoreDescriptor::ValueRegister()); // Restore value. |
| CallKeyedStoreIC(slot); |
| break; |
| } |
| case NAMED_SUPER_PROPERTY: |
| case KEYED_SUPER_PROPERTY: |
| UNREACHABLE(); |
| break; |
| } |
| context()->Plug(rax); |
| } |
| |
| |
| void FullCodeGenerator::EmitStoreToStackLocalOrContextSlot( |
| Variable* var, MemOperand location) { |
| __ movp(location, rax); |
| if (var->IsContextSlot()) { |
| __ movp(rdx, rax); |
| __ RecordWriteContextSlot( |
| rcx, Context::SlotOffset(var->index()), rdx, rbx, kDontSaveFPRegs); |
| } |
| } |
| |
| void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op, |
| FeedbackSlot slot, |
| HoleCheckMode hole_check_mode) { |
| if (var->IsUnallocated()) { |
| // Global var, const, or let. |
| __ LoadGlobalObject(StoreDescriptor::ReceiverRegister()); |
| CallStoreIC(slot, var->name()); |
| |
| } else if (IsLexicalVariableMode(var->mode()) && op != Token::INIT) { |
| DCHECK(!var->IsLookupSlot()); |
| DCHECK(var->IsStackAllocated() || var->IsContextSlot()); |
| MemOperand location = VarOperand(var, rcx); |
| // Perform an initialization check for lexically declared variables. |
| if (hole_check_mode == HoleCheckMode::kRequired) { |
| Label assign; |
| __ movp(rdx, location); |
| __ CompareRoot(rdx, Heap::kTheHoleValueRootIndex); |
| __ j(not_equal, &assign, Label::kNear); |
| __ Push(var->name()); |
| __ CallRuntime(Runtime::kThrowReferenceError); |
| __ bind(&assign); |
| } |
| if (var->mode() != CONST) { |
| EmitStoreToStackLocalOrContextSlot(var, location); |
| } else if (var->throw_on_const_assignment(language_mode())) { |
| __ CallRuntime(Runtime::kThrowConstAssignError); |
| } |
| |
| } else if (var->is_this() && var->mode() == CONST && op == Token::INIT) { |
| // Initializing assignment to const {this} needs a write barrier. |
| DCHECK(var->IsStackAllocated() || var->IsContextSlot()); |
| Label uninitialized_this; |
| MemOperand location = VarOperand(var, rcx); |
| __ movp(rdx, location); |
| __ CompareRoot(rdx, Heap::kTheHoleValueRootIndex); |
| __ j(equal, &uninitialized_this); |
| __ Push(var->name()); |
| __ CallRuntime(Runtime::kThrowReferenceError); |
| __ bind(&uninitialized_this); |
| EmitStoreToStackLocalOrContextSlot(var, location); |
| |
| } else { |
| DCHECK(var->mode() != CONST || op == Token::INIT); |
| DCHECK(var->IsStackAllocated() || var->IsContextSlot()); |
| DCHECK(!var->IsLookupSlot()); |
| // Assignment to var or initializing assignment to let/const in harmony |
| // mode. |
| MemOperand location = VarOperand(var, rcx); |
| if (FLAG_debug_code && var->mode() == LET && op == Token::INIT) { |
| // Check for an uninitialized let binding. |
| __ movp(rdx, location); |
| __ CompareRoot(rdx, Heap::kTheHoleValueRootIndex); |
| __ Check(equal, kLetBindingReInitialization); |
| } |
| EmitStoreToStackLocalOrContextSlot(var, location); |
| } |
| } |
| |
| |
| void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) { |
| // Assignment to a property, using a named store IC. |
| Property* prop = expr->target()->AsProperty(); |
| DCHECK(prop != NULL); |
| DCHECK(prop->key()->IsLiteral()); |
| |
| PopOperand(StoreDescriptor::ReceiverRegister()); |
| CallStoreIC(expr->AssignmentSlot(), prop->key()->AsLiteral()->value()); |
| |
| PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER); |
| context()->Plug(rax); |
| } |
| |
| |
| void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) { |
| // Assignment to a property, using a keyed store IC. |
| PopOperand(StoreDescriptor::NameRegister()); // Key. |
| PopOperand(StoreDescriptor::ReceiverRegister()); |
| DCHECK(StoreDescriptor::ValueRegister().is(rax)); |
| CallKeyedStoreIC(expr->AssignmentSlot()); |
| |
| PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER); |
| context()->Plug(rax); |
| } |
| |
| // Code common for calls using the IC. |
| void FullCodeGenerator::EmitCallWithLoadIC(Call* expr) { |
| Expression* callee = expr->expression(); |
| |
| // Get the target function. |
| ConvertReceiverMode convert_mode; |
| if (callee->IsVariableProxy()) { |
| { StackValueContext context(this); |
| EmitVariableLoad(callee->AsVariableProxy()); |
| PrepareForBailout(callee, BailoutState::NO_REGISTERS); |
| } |
| // Push undefined as receiver. This is patched in the Call builtin if it |
| // is a sloppy mode method. |
| PushOperand(isolate()->factory()->undefined_value()); |
| convert_mode = ConvertReceiverMode::kNullOrUndefined; |
| } else { |
| // Load the function from the receiver. |
| DCHECK(callee->IsProperty()); |
| DCHECK(!callee->AsProperty()->IsSuperAccess()); |
| __ movp(LoadDescriptor::ReceiverRegister(), Operand(rsp, 0)); |
| EmitNamedPropertyLoad(callee->AsProperty()); |
| PrepareForBailoutForId(callee->AsProperty()->LoadId(), |
| BailoutState::TOS_REGISTER); |
| // Push the target function under the receiver. |
| PushOperand(Operand(rsp, 0)); |
| __ movp(Operand(rsp, kPointerSize), rax); |
| convert_mode = ConvertReceiverMode::kNotNullOrUndefined; |
| } |
| |
| EmitCall(expr, convert_mode); |
| } |
| |
| |
| // Common code 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()); |
| __ movp(LoadDescriptor::ReceiverRegister(), Operand(rsp, 0)); |
| __ Move(LoadDescriptor::NameRegister(), rax); |
| EmitKeyedPropertyLoad(callee->AsProperty()); |
| PrepareForBailoutForId(callee->AsProperty()->LoadId(), |
| BailoutState::TOS_REGISTER); |
| |
| // Push the target function under the receiver. |
| PushOperand(Operand(rsp, 0)); |
| __ movp(Operand(rsp, kPointerSize), rax); |
| |
| EmitCall(expr, ConvertReceiverMode::kNotNullOrUndefined); |
| } |
| |
| |
| void FullCodeGenerator::EmitCall(Call* expr, ConvertReceiverMode mode) { |
| // Load the arguments. |
| ZoneList<Expression*>* args = expr->arguments(); |
| int arg_count = args->length(); |
| for (int i = 0; i < arg_count; i++) { |
| VisitForStackValue(args->at(i)); |
| } |
| |
| PrepareForBailoutForId(expr->CallId(), BailoutState::NO_REGISTERS); |
| SetCallPosition(expr, expr->tail_call_mode()); |
| if (expr->tail_call_mode() == TailCallMode::kAllow) { |
| if (FLAG_trace) { |
| __ CallRuntime(Runtime::kTraceTailCall); |
| } |
| // Update profiling counters before the tail call since we will |
| // not return to this function. |
| EmitProfilingCounterHandlingForReturnSequence(true); |
| } |
| Handle<Code> code = |
| CodeFactory::CallICTrampoline(isolate(), mode, expr->tail_call_mode()) |
| .code(); |
| __ Set(rdx, IntFromSlot(expr->CallFeedbackICSlot())); |
| __ movp(rdi, Operand(rsp, (arg_count + 1) * kPointerSize)); |
| __ Set(rax, arg_count); |
| CallIC(code); |
| OperandStackDepthDecrement(arg_count + 1); |
| |
| RecordJSReturnSite(expr); |
| RestoreContext(); |
| // Discard the function left on TOS. |
| context()->DropAndPlug(1, rax); |
| } |
| |
| void FullCodeGenerator::VisitCallNew(CallNew* expr) { |
| Comment cmnt(masm_, "[ CallNew"); |
| // According to ECMA-262, section 11.2.2, page 44, the function |
| // expression in new calls must be evaluated before the |
| // arguments. |
| |
| // Push constructor on the stack. If it's not a function it's used as |
| // receiver for CALL_NON_FUNCTION, otherwise the value on the stack is |
| // ignored. |
| DCHECK(!expr->expression()->IsSuperPropertyReference()); |
| VisitForStackValue(expr->expression()); |
| |
| // Push the arguments ("left-to-right") on the stack. |
| ZoneList<Expression*>* args = expr->arguments(); |
| int arg_count = args->length(); |
| for (int i = 0; i < arg_count; i++) { |
| VisitForStackValue(args->at(i)); |
| } |
| |
| // Call the construct call builtin that handles allocation and |
| // constructor invocation. |
| SetConstructCallPosition(expr); |
| |
| // Load function and argument count into rdi and rax. |
| __ Set(rax, arg_count); |
| __ movp(rdi, Operand(rsp, arg_count * kPointerSize)); |
| |
| // Record call targets in unoptimized code, but not in the snapshot. |
| __ EmitLoadFeedbackVector(rbx); |
| __ Move(rdx, SmiFromSlot(expr->CallNewFeedbackSlot())); |
| |
| CallConstructStub stub(isolate()); |
| CallIC(stub.GetCode()); |
| OperandStackDepthDecrement(arg_count + 1); |
| PrepareForBailoutForId(expr->ReturnId(), BailoutState::TOS_REGISTER); |
| RestoreContext(); |
| context()->Plug(rax); |
| } |
| |
| 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); |
| __ JumpIfSmi(rax, if_true); |
| __ jmp(if_false); |
| |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::EmitIsJSReceiver(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(rax, if_false); |
| __ CmpObjectType(rax, FIRST_JS_RECEIVER_TYPE, rbx); |
| PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| Split(above_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(rax, if_false); |
| __ CmpObjectType(rax, JS_ARRAY_TYPE, rbx); |
| PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| Split(equal, if_true, if_false, fall_through); |
| |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::EmitIsTypedArray(CallRuntime* expr) { |
| ZoneList<Expression*>* args = expr->arguments(); |
| DCHECK(args->length() == 1); |
| |
| VisitForAccumulatorValue(args->at(0)); |
| |
| Label materialize_true, materialize_false; |
| Label* if_true = NULL; |
| Label* if_false = NULL; |
| Label* fall_through = NULL; |
| context()->PrepareTest(&materialize_true, &materialize_false, &if_true, |
| &if_false, &fall_through); |
| |
| __ JumpIfSmi(rax, if_false); |
| __ CmpObjectType(rax, JS_TYPED_ARRAY_TYPE, rbx); |
| 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(rax, if_false); |
| __ CmpObjectType(rax, JS_PROXY_TYPE, rbx); |
| PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| Split(equal, if_true, if_false, fall_through); |
| |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| 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 not a JSReceiver, we return null. |
| __ JumpIfSmi(rax, &null, Label::kNear); |
| STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE); |
| __ CmpObjectType(rax, FIRST_JS_RECEIVER_TYPE, rax); |
| __ j(below, &null, Label::kNear); |
| |
| // Return 'Function' for JSFunction and JSBoundFunction objects. |
| __ CmpInstanceType(rax, FIRST_FUNCTION_TYPE); |
| STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE); |
| __ j(above_equal, &function, Label::kNear); |
| |
| // Check if the constructor in the map is a JS function. |
| __ GetMapConstructor(rax, rax, rbx); |
| __ CmpInstanceType(rbx, JS_FUNCTION_TYPE); |
| __ j(not_equal, &non_function_constructor, Label::kNear); |
| |
| // rax now contains the constructor function. Grab the |
| // instance class name from there. |
| __ movp(rax, FieldOperand(rax, JSFunction::kSharedFunctionInfoOffset)); |
| __ movp(rax, FieldOperand(rax, SharedFunctionInfo::kInstanceClassNameOffset)); |
| __ jmp(&done, Label::kNear); |
| |
| // Non-JS objects have class null. |
| __ bind(&null); |
| __ LoadRoot(rax, Heap::kNullValueRootIndex); |
| __ jmp(&done, Label::kNear); |
| |
| // Functions have class 'Function'. |
| __ bind(&function); |
| __ LoadRoot(rax, Heap::kFunction_stringRootIndex); |
| __ jmp(&done, Label::kNear); |
| |
| // Objects with a non-function constructor have class 'Object'. |
| __ bind(&non_function_constructor); |
| __ LoadRoot(rax, Heap::kObject_stringRootIndex); |
| |
| // All done. |
| __ bind(&done); |
| |
| context()->Plug(rax); |
| } |
| |
| |
| void FullCodeGenerator::EmitStringCharCodeAt(CallRuntime* expr) { |
| ZoneList<Expression*>* args = expr->arguments(); |
| DCHECK(args->length() == 2); |
| |
| VisitForStackValue(args->at(0)); |
| VisitForAccumulatorValue(args->at(1)); |
| |
| Register object = rbx; |
| Register index = rax; |
| Register result = rdx; |
| |
| PopOperand(object); |
| |
| Label need_conversion; |
| Label index_out_of_range; |
| Label done; |
| StringCharCodeAtGenerator generator(object, index, result, &need_conversion, |
| &need_conversion, &index_out_of_range); |
| generator.GenerateFast(masm_); |
| __ jmp(&done); |
| |
| __ bind(&index_out_of_range); |
| // When the index is out of range, the spec requires us to return |
| // NaN. |
| __ LoadRoot(result, Heap::kNanValueRootIndex); |
| __ jmp(&done); |
| |
| __ bind(&need_conversion); |
| // Move the undefined value into the result register, which will |
| // trigger conversion. |
| __ LoadRoot(result, Heap::kUndefinedValueRootIndex); |
| __ jmp(&done); |
| |
| NopRuntimeCallHelper call_helper; |
| generator.GenerateSlow(masm_, NOT_PART_OF_IC_HANDLER, call_helper); |
| |
| __ bind(&done); |
| context()->Plug(result); |
| } |
| |
| |
| void FullCodeGenerator::EmitCall(CallRuntime* expr) { |
| ZoneList<Expression*>* args = expr->arguments(); |
| DCHECK_LE(2, args->length()); |
| // Push target, receiver and arguments onto the stack. |
| for (Expression* const arg : *args) { |
| VisitForStackValue(arg); |
| } |
| PrepareForBailoutForId(expr->CallId(), BailoutState::NO_REGISTERS); |
| // Move target to rdi. |
| int const argc = args->length() - 2; |
| __ movp(rdi, Operand(rsp, (argc + 1) * kPointerSize)); |
| // Call the target. |
| __ Set(rax, argc); |
| __ Call(isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); |
| OperandStackDepthDecrement(argc + 1); |
| RestoreContext(); |
| // Discard the function left on TOS. |
| context()->DropAndPlug(1, rax); |
| } |
| |
| void FullCodeGenerator::EmitGetSuperConstructor(CallRuntime* expr) { |
| ZoneList<Expression*>* args = expr->arguments(); |
| DCHECK_EQ(1, args->length()); |
| VisitForAccumulatorValue(args->at(0)); |
| __ AssertFunction(rax); |
| __ movp(rax, FieldOperand(rax, HeapObject::kMapOffset)); |
| __ movp(rax, FieldOperand(rax, Map::kPrototypeOffset)); |
| context()->Plug(rax); |
| } |
| |
| void FullCodeGenerator::EmitDebugIsActive(CallRuntime* expr) { |
| DCHECK(expr->arguments()->length() == 0); |
| ExternalReference debug_is_active = |
| ExternalReference::debug_is_active_address(isolate()); |
| __ Move(kScratchRegister, debug_is_active); |
| __ movzxbp(rax, Operand(kScratchRegister, 0)); |
| __ Integer32ToSmi(rax, rax); |
| context()->Plug(rax); |
| } |
| |
| |
| void FullCodeGenerator::EmitCreateIterResultObject(CallRuntime* expr) { |
| ZoneList<Expression*>* args = expr->arguments(); |
| DCHECK_EQ(2, args->length()); |
| VisitForStackValue(args->at(0)); |
| VisitForStackValue(args->at(1)); |
| |
| Label runtime, done; |
| |
| __ Allocate(JSIteratorResult::kSize, rax, rcx, rdx, &runtime, |
| NO_ALLOCATION_FLAGS); |
| __ LoadNativeContextSlot(Context::ITERATOR_RESULT_MAP_INDEX, rbx); |
| __ movp(FieldOperand(rax, HeapObject::kMapOffset), rbx); |
| __ LoadRoot(rbx, Heap::kEmptyFixedArrayRootIndex); |
| __ movp(FieldOperand(rax, JSObject::kPropertiesOffset), rbx); |
| __ movp(FieldOperand(rax, JSObject::kElementsOffset), rbx); |
| __ Pop(FieldOperand(rax, JSIteratorResult::kDoneOffset)); |
| __ Pop(FieldOperand(rax, JSIteratorResult::kValueOffset)); |
| STATIC_ASSERT(JSIteratorResult::kSize == 5 * kPointerSize); |
| __ jmp(&done, Label::kNear); |
| |
| __ bind(&runtime); |
| CallRuntimeWithOperands(Runtime::kCreateIterResultObject); |
| |
| __ bind(&done); |
| context()->Plug(rax); |
| } |
| |
| |
| void FullCodeGenerator::EmitLoadJSRuntimeFunction(CallRuntime* expr) { |
| // Push function. |
| __ LoadNativeContextSlot(expr->context_index(), rax); |
| PushOperand(rax); |
| |
| // Push undefined as receiver. |
| OperandStackDepthIncrement(1); |
| __ PushRoot(Heap::kUndefinedValueRootIndex); |
| } |
| |
| |
| void FullCodeGenerator::EmitCallJSRuntimeFunction(CallRuntime* expr) { |
| ZoneList<Expression*>* args = expr->arguments(); |
| int arg_count = args->length(); |
| |
| SetCallPosition(expr); |
| __ movp(rdi, Operand(rsp, (arg_count + 1) * kPointerSize)); |
| __ Set(rax, arg_count); |
| __ Call(isolate()->builtins()->Call(ConvertReceiverMode::kNullOrUndefined), |
| RelocInfo::CODE_TARGET); |
| OperandStackDepthDecrement(arg_count + 1); |
| RestoreContext(); |
| } |
| |
| |
| 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()); |
| CallRuntimeWithOperands(is_strict(language_mode()) |
| ? Runtime::kDeleteProperty_Strict |
| : Runtime::kDeleteProperty_Sloppy); |
| context()->Plug(rax); |
| } else if (proxy != NULL) { |
| Variable* var = proxy->var(); |
| // Delete of an unqualified identifier is disallowed in strict mode but |
| // "delete this" is allowed. |
| bool is_this = var->is_this(); |
| DCHECK(is_sloppy(language_mode()) || is_this); |
| if (var->IsUnallocated()) { |
| __ movp(rax, NativeContextOperand()); |
| __ Push(ContextOperand(rax, Context::EXTENSION_INDEX)); |
| __ Push(var->name()); |
| __ CallRuntime(Runtime::kDeleteProperty_Sloppy); |
| context()->Plug(rax); |
| } else { |
| DCHECK(!var->IsLookupSlot()); |
| DCHECK(var->IsStackAllocated() || var->IsContextSlot()); |
| // Result of deleting non-global variables is false. 'this' is |
| // not really a variable, though we implement it as one. The |
| // subexpression does not have side effects. |
| context()->Plug(is_this); |
| } |
| } else { |
| // 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(Heap::kUndefinedValueRootIndex); |
| 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); |
| if (!context()->IsAccumulatorValue()) OperandStackDepthIncrement(1); |
| __ bind(&materialize_true); |
| PrepareForBailoutForId(expr->MaterializeTrueId(), |
| BailoutState::NO_REGISTERS); |
| if (context()->IsAccumulatorValue()) { |
| __ LoadRoot(rax, Heap::kTrueValueRootIndex); |
| } else { |
| __ PushRoot(Heap::kTrueValueRootIndex); |
| } |
| __ jmp(&done, Label::kNear); |
| __ bind(&materialize_false); |
| PrepareForBailoutForId(expr->MaterializeFalseId(), |
| BailoutState::NO_REGISTERS); |
| if (context()->IsAccumulatorValue()) { |
| __ LoadRoot(rax, Heap::kFalseValueRootIndex); |
| } else { |
| __ PushRoot(Heap::kFalseValueRootIndex); |
| } |
| __ bind(&done); |
| } |
| break; |
| } |
| |
| case Token::TYPEOF: { |
| Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)"); |
| { |
| AccumulatorValueContext context(this); |
| VisitForTypeofValue(expr->expression()); |
| } |
| __ movp(rbx, rax); |
| __ Call(isolate()->builtins()->Typeof(), RelocInfo::CODE_TARGET); |
| context()->Plug(rax); |
| break; |
| } |
| |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitCountOperation(CountOperation* expr) { |
| DCHECK(expr->expression()->IsValidReferenceExpressionOrThis()); |
| |
| Comment cmnt(masm_, "[ CountOperation"); |
| |
| Property* prop = expr->expression()->AsProperty(); |
| LhsKind assign_type = Property::GetAssignType(prop); |
| |
| // Evaluate expression and get value. |
| if (assign_type == VARIABLE) { |
| DCHECK(expr->expression()->AsVariableProxy()->var() != NULL); |
| AccumulatorValueContext context(this); |
| EmitVariableLoad(expr->expression()->AsVariableProxy()); |
| } else { |
| // Reserve space for result of postfix operation. |
| if (expr->is_postfix() && !context()->IsEffect()) { |
| PushOperand(Smi::kZero); |
| } |
| switch (assign_type) { |
| case NAMED_PROPERTY: { |
| VisitForStackValue(prop->obj()); |
| __ movp(LoadDescriptor::ReceiverRegister(), Operand(rsp, 0)); |
| EmitNamedPropertyLoad(prop); |
| break; |
| } |
| |
| case KEYED_PROPERTY: { |
| VisitForStackValue(prop->obj()); |
| VisitForStackValue(prop->key()); |
| // Leave receiver on stack |
| __ movp(LoadDescriptor::ReceiverRegister(), Operand(rsp, kPointerSize)); |
| // Copy of key, needed for later store. |
| __ movp(LoadDescriptor::NameRegister(), Operand(rsp, 0)); |
| EmitKeyedPropertyLoad(prop); |
| break; |
| } |
| |
| case NAMED_SUPER_PROPERTY: |
| case KEYED_SUPER_PROPERTY: |
| 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(), BailoutState::TOS_REGISTER); |
| } else { |
| PrepareForBailoutForId(prop->LoadId(), BailoutState::TOS_REGISTER); |
| } |
| |
| // 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(rax, &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(rax); |
| break; |
| case NAMED_PROPERTY: |
| __ movp(Operand(rsp, kPointerSize), rax); |
| break; |
| case KEYED_PROPERTY: |
| __ movp(Operand(rsp, 2 * kPointerSize), rax); |
| break; |
| case NAMED_SUPER_PROPERTY: |
| case KEYED_SUPER_PROPERTY: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| } |
| |
| SmiOperationConstraints constraints = |
| SmiOperationConstraint::kPreserveSourceRegister | |
| SmiOperationConstraint::kBailoutOnNoOverflow; |
| if (expr->op() == Token::INC) { |
| __ SmiAddConstant(rax, rax, Smi::FromInt(1), constraints, &done, |
| Label::kNear); |
| } else { |
| __ SmiSubConstant(rax, rax, Smi::FromInt(1), constraints, &done, |
| Label::kNear); |
| } |
| __ jmp(&stub_call, Label::kNear); |
| __ bind(&slow); |
| } |
| |
| // Convert old value into a number. |
| __ Call(isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET); |
| RestoreContext(); |
| PrepareForBailoutForId(expr->ToNumberId(), BailoutState::TOS_REGISTER); |
| |
| // 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: |
| PushOperand(rax); |
| break; |
| case NAMED_PROPERTY: |
| __ movp(Operand(rsp, kPointerSize), rax); |
| break; |
| case KEYED_PROPERTY: |
| __ movp(Operand(rsp, 2 * kPointerSize), rax); |
| break; |
| case NAMED_SUPER_PROPERTY: |
| case KEYED_SUPER_PROPERTY: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| } |
| |
| SetExpressionPosition(expr); |
| |
| // Call stub for +1/-1. |
| __ bind(&stub_call); |
| __ movp(rdx, rax); |
| __ Move(rax, 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 rax. |
| switch (assign_type) { |
| case VARIABLE: { |
| VariableProxy* proxy = expr->expression()->AsVariableProxy(); |
| if (expr->is_postfix()) { |
| // Perform the assignment as if via '='. |
| { EffectContext context(this); |
| EmitVariableAssignment(proxy->var(), Token::ASSIGN, expr->CountSlot(), |
| proxy->hole_check_mode()); |
| PrepareForBailoutForId(expr->AssignmentId(), |
| BailoutState::TOS_REGISTER); |
| context.Plug(rax); |
| } |
| // For all contexts except kEffect: We have the result on |
| // top of the stack. |
| if (!context()->IsEffect()) { |
| context()->PlugTOS(); |
| } |
| } else { |
| // Perform the assignment as if via '='. |
| EmitVariableAssignment(proxy->var(), Token::ASSIGN, expr->CountSlot(), |
| proxy->hole_check_mode()); |
| PrepareForBailoutForId(expr->AssignmentId(), |
| BailoutState::TOS_REGISTER); |
| context()->Plug(rax); |
| } |
| break; |
| } |
| case NAMED_PROPERTY: { |
| PopOperand(StoreDescriptor::ReceiverRegister()); |
| CallStoreIC(expr->CountSlot(), prop->key()->AsLiteral()->value()); |
| PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER); |
| if (expr->is_postfix()) { |
| if (!context()->IsEffect()) { |
| context()->PlugTOS(); |
| } |
| } else { |
| context()->Plug(rax); |
| } |
| break; |
| } |
| case KEYED_PROPERTY: { |
| PopOperand(StoreDescriptor::NameRegister()); |
| PopOperand(StoreDescriptor::ReceiverRegister()); |
| CallKeyedStoreIC(expr->CountSlot()); |
| PrepareForBailoutForId(expr->AssignmentId(), BailoutState::TOS_REGISTER); |
| if (expr->is_postfix()) { |
| if (!context()->IsEffect()) { |
| context()->PlugTOS(); |
| } |
| } else { |
| context()->Plug(rax); |
| } |
| break; |
| } |
| case NAMED_SUPER_PROPERTY: |
| case KEYED_SUPER_PROPERTY: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| |
| |
| void FullCodeGenerator::EmitLiteralCompareTypeof(Expression* expr, |
| Expression* sub_expr, |
| Handle<String> check) { |
| Label materialize_true, materialize_false; |
| Label* if_true = NULL; |
| Label* if_false = NULL; |
| Label* fall_through = NULL; |
| context()->PrepareTest(&materialize_true, &materialize_false, |
| &if_true, &if_false, &fall_through); |
| |
| { AccumulatorValueContext context(this); |
| VisitForTypeofValue(sub_expr); |
| } |
| PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| |
| Factory* factory = isolate()->factory(); |
| if (String::Equals(check, factory->number_string())) { |
| __ JumpIfSmi(rax, if_true); |
| __ movp(rax, FieldOperand(rax, HeapObject::kMapOffset)); |
| __ CompareRoot(rax, Heap::kHeapNumberMapRootIndex); |
| Split(equal, if_true, if_false, fall_through); |
| } else if (String::Equals(check, factory->string_string())) { |
| __ JumpIfSmi(rax, if_false); |
| __ CmpObjectType(rax, FIRST_NONSTRING_TYPE, rdx); |
| Split(below, if_true, if_false, fall_through); |
| } else if (String::Equals(check, factory->symbol_string())) { |
| __ JumpIfSmi(rax, if_false); |
| __ CmpObjectType(rax, SYMBOL_TYPE, rdx); |
| Split(equal, if_true, if_false, fall_through); |
| } else if (String::Equals(check, factory->boolean_string())) { |
| __ CompareRoot(rax, Heap::kTrueValueRootIndex); |
| __ j(equal, if_true); |
| __ CompareRoot(rax, Heap::kFalseValueRootIndex); |
| Split(equal, if_true, if_false, fall_through); |
| } else if (String::Equals(check, factory->undefined_string())) { |
| __ CompareRoot(rax, Heap::kNullValueRootIndex); |
| __ j(equal, if_false); |
| __ JumpIfSmi(rax, if_false); |
| // Check for undetectable objects => true. |
| __ movp(rdx, FieldOperand(rax, HeapObject::kMapOffset)); |
| __ testb(FieldOperand(rdx, Map::kBitFieldOffset), |
| Immediate(1 << Map::kIsUndetectable)); |
| Split(not_zero, if_true, if_false, fall_through); |
| } else if (String::Equals(check, factory->function_string())) { |
| __ JumpIfSmi(rax, if_false); |
| // Check for callable and not undetectable objects => true. |
| __ movp(rdx, FieldOperand(rax, HeapObject::kMapOffset)); |
| __ movzxbl(rdx, FieldOperand(rdx, Map::kBitFieldOffset)); |
| __ andb(rdx, |
| Immediate((1 << Map::kIsCallable) | (1 << Map::kIsUndetectable))); |
| __ cmpb(rdx, Immediate(1 << Map::kIsCallable)); |
| Split(equal, if_true, if_false, fall_through); |
| } else if (String::Equals(check, factory->object_string())) { |
| __ JumpIfSmi(rax, if_false); |
| __ CompareRoot(rax, Heap::kNullValueRootIndex); |
| __ j(equal, if_true); |
| STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE); |
| __ CmpObjectType(rax, FIRST_JS_RECEIVER_TYPE, rdx); |
| __ j(below, if_false); |
| // Check for callable or undetectable objects => false. |
| __ testb(FieldOperand(rdx, Map::kBitFieldOffset), |
| Immediate((1 << Map::kIsCallable) | (1 << Map::kIsUndetectable))); |
| Split(zero, if_true, if_false, fall_through); |
| // clang-format off |
| #define SIMD128_TYPE(TYPE, Type, type, lane_count, lane_type) \ |
| } else if (String::Equals(check, factory->type##_string())) { \ |
| __ JumpIfSmi(rax, if_false); \ |
| __ movp(rax, FieldOperand(rax, HeapObject::kMapOffset)); \ |
| __ CompareRoot(rax, Heap::k##Type##MapRootIndex); \ |
| Split(equal, if_true, if_false, fall_through); |
| SIMD128_TYPES(SIMD128_TYPE) |
| #undef SIMD128_TYPE |
| // clang-format on |
| } else { |
| if (if_false != fall_through) __ jmp(if_false); |
| } |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) { |
| Comment cmnt(masm_, "[ CompareOperation"); |
| |
| // 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()); |
| SetExpressionPosition(expr); |
| EmitHasProperty(); |
| PrepareForBailoutBeforeSplit(expr, false, NULL, NULL); |
| __ CompareRoot(rax, Heap::kTrueValueRootIndex); |
| Split(equal, if_true, if_false, fall_through); |
| break; |
| |
| case Token::INSTANCEOF: { |
| VisitForAccumulatorValue(expr->right()); |
| SetExpressionPosition(expr); |
| PopOperand(rdx); |
| __ Call(isolate()->builtins()->InstanceOf(), RelocInfo::CODE_TARGET); |
| RestoreContext(); |
| PrepareForBailoutBeforeSplit(expr, false, NULL, NULL); |
| __ CompareRoot(rax, Heap::kTrueValueRootIndex); |
| Split(equal, if_true, if_false, fall_through); |
| break; |
| } |
| |
| default: { |
| VisitForAccumulatorValue(expr->right()); |
| SetExpressionPosition(expr); |
| Condition cc = CompareIC::ComputeCondition(op); |
| PopOperand(rdx); |
| |
| bool inline_smi_code = ShouldInlineSmiCase(op); |
| JumpPatchSite patch_site(masm_); |
| if (inline_smi_code) { |
| Label slow_case; |
| __ movp(rcx, rdx); |
| __ orp(rcx, rax); |
| patch_site.EmitJumpIfNotSmi(rcx, &slow_case, Label::kNear); |
| __ cmpp(rdx, rax); |
| Split(cc, if_true, if_false, NULL); |
| __ bind(&slow_case); |
| } |
| |
| Handle<Code> ic = CodeFactory::CompareIC(isolate(), op).code(); |
| CallIC(ic, expr->CompareOperationFeedbackId()); |
| patch_site.EmitPatchInfo(); |
| |
| PrepareForBailoutBeforeSplit(expr, true, if_true, if_false); |
| __ testp(rax, rax); |
| 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); |
| if (expr->op() == Token::EQ_STRICT) { |
| Heap::RootListIndex nil_value = nil == kNullValue ? |
| Heap::kNullValueRootIndex : |
| Heap::kUndefinedValueRootIndex; |
| __ CompareRoot(rax, nil_value); |
| Split(equal, if_true, if_false, fall_through); |
| } else { |
| __ JumpIfSmi(rax, if_false); |
| __ movp(rax, FieldOperand(rax, HeapObject::kMapOffset)); |
| __ testb(FieldOperand(rax, Map::kBitFieldOffset), |
| Immediate(1 << Map::kIsUndetectable)); |
| Split(not_zero, if_true, if_false, fall_through); |
| } |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| Register FullCodeGenerator::result_register() { |
| return rax; |
| } |
| |
| |
| Register FullCodeGenerator::context_register() { |
| return rsi; |
| } |
| |
| void FullCodeGenerator::LoadFromFrameField(int frame_offset, Register value) { |
| DCHECK(IsAligned(frame_offset, kPointerSize)); |
| __ movp(value, Operand(rbp, frame_offset)); |
| } |
| |
| void FullCodeGenerator::StoreToFrameField(int frame_offset, Register value) { |
| DCHECK(IsAligned(frame_offset, kPointerSize)); |
| __ movp(Operand(rbp, frame_offset), value); |
| } |
| |
| |
| void FullCodeGenerator::LoadContextField(Register dst, int context_index) { |
| __ movp(dst, ContextOperand(rsi, context_index)); |
| } |
| |
| |
| void FullCodeGenerator::PushFunctionArgumentForContextAllocation() { |
| DeclarationScope* closure_scope = scope()->GetClosureScope(); |
| if (closure_scope->is_script_scope() || |
| closure_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. |
| __ movp(rax, NativeContextOperand()); |
| PushOperand(ContextOperand(rax, Context::CLOSURE_INDEX)); |
| } else if (closure_scope->is_eval_scope()) { |
| // Contexts created by a call to eval have the same closure as the |
| // context calling eval, not the anonymous closure containing the eval |
| // code. Fetch it from the context. |
| PushOperand(ContextOperand(rsi, Context::CLOSURE_INDEX)); |
| } else { |
| DCHECK(closure_scope->is_function_scope()); |
| PushOperand(Operand(rbp, JavaScriptFrameConstants::kFunctionOffset)); |
| } |
| } |
| |
| |
| #undef __ |
| |
| |
| static const byte kJnsInstruction = 0x79; |
| 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: |
| // 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(unoptimized_code->GetIsolate(), |
| 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)); |
| |
| DCHECK_EQ( |
| isolate->builtins()->OnStackReplacement()->entry(), |
| Assembler::target_address_at(call_target_address, unoptimized_code)); |
| return ON_STACK_REPLACEMENT; |
| } |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_TARGET_ARCH_X64 |