| // Copyright 2011 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "v8.h" |
| |
| #if defined(V8_TARGET_ARCH_IA32) |
| |
| #include "code-stubs.h" |
| #include "codegen-inl.h" |
| #include "compiler.h" |
| #include "debug.h" |
| #include "full-codegen.h" |
| #include "parser.h" |
| #include "scopes.h" |
| #include "stub-cache.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() { |
| ASSERT(patch_site_.is_bound() == info_emitted_); |
| } |
| |
| void EmitJumpIfNotSmi(Register reg, NearLabel* target) { |
| __ test(reg, Immediate(kSmiTagMask)); |
| EmitJump(not_carry, target); // Always taken before patched. |
| } |
| |
| void EmitJumpIfSmi(Register reg, NearLabel* target) { |
| __ test(reg, Immediate(kSmiTagMask)); |
| EmitJump(carry, target); // Never taken before patched. |
| } |
| |
| void EmitPatchInfo() { |
| int delta_to_patch_site = masm_->SizeOfCodeGeneratedSince(&patch_site_); |
| ASSERT(is_int8(delta_to_patch_site)); |
| __ test(eax, Immediate(delta_to_patch_site)); |
| #ifdef DEBUG |
| info_emitted_ = true; |
| #endif |
| } |
| |
| bool is_bound() const { return patch_site_.is_bound(); } |
| |
| private: |
| // jc will be patched with jz, jnc will become jnz. |
| void EmitJump(Condition cc, NearLabel* target) { |
| ASSERT(!patch_site_.is_bound() && !info_emitted_); |
| ASSERT(cc == carry || cc == not_carry); |
| __ bind(&patch_site_); |
| __ j(cc, target); |
| } |
| |
| MacroAssembler* masm_; |
| Label patch_site_; |
| #ifdef DEBUG |
| bool info_emitted_; |
| #endif |
| }; |
| |
| |
| // Generate code for a JS function. On entry to the function the receiver |
| // and arguments have been pushed on the stack left to right, with the |
| // return address on top of them. The actual argument count matches the |
| // formal parameter count expected by the function. |
| // |
| // The live registers are: |
| // o edi: the JS function object being called (ie, ourselves) |
| // o esi: our context |
| // o ebp: our caller's frame pointer |
| // o esp: stack pointer (pointing to return address) |
| // |
| // The function builds a JS frame. Please see JavaScriptFrameConstants in |
| // frames-ia32.h for its layout. |
| void FullCodeGenerator::Generate(CompilationInfo* info) { |
| ASSERT(info_ == NULL); |
| info_ = info; |
| SetFunctionPosition(function()); |
| Comment cmnt(masm_, "[ function compiled by full code generator"); |
| |
| #ifdef DEBUG |
| if (strlen(FLAG_stop_at) > 0 && |
| info->function()->name()->IsEqualTo(CStrVector(FLAG_stop_at))) { |
| __ int3(); |
| } |
| #endif |
| |
| __ push(ebp); // Caller's frame pointer. |
| __ mov(ebp, esp); |
| __ push(esi); // Callee's context. |
| __ push(edi); // Callee's JS Function. |
| |
| { Comment cmnt(masm_, "[ Allocate locals"); |
| int locals_count = scope()->num_stack_slots(); |
| if (locals_count == 1) { |
| __ push(Immediate(Factory::undefined_value())); |
| } else if (locals_count > 1) { |
| __ mov(eax, Immediate(Factory::undefined_value())); |
| for (int i = 0; i < locals_count; i++) { |
| __ push(eax); |
| } |
| } |
| } |
| |
| bool function_in_register = true; |
| |
| // Possibly allocate a local context. |
| int heap_slots = scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS; |
| if (heap_slots > 0) { |
| Comment cmnt(masm_, "[ Allocate local context"); |
| // Argument to NewContext is the function, which is still in edi. |
| __ push(edi); |
| if (heap_slots <= FastNewContextStub::kMaximumSlots) { |
| FastNewContextStub stub(heap_slots); |
| __ CallStub(&stub); |
| } else { |
| __ CallRuntime(Runtime::kNewContext, 1); |
| } |
| function_in_register = false; |
| // Context is returned in both eax and esi. It replaces the context |
| // passed to us. It's saved in the stack and kept live in esi. |
| __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), esi); |
| |
| // Copy parameters into context if necessary. |
| int num_parameters = scope()->num_parameters(); |
| for (int i = 0; i < num_parameters; i++) { |
| Slot* slot = scope()->parameter(i)->AsSlot(); |
| if (slot != NULL && slot->type() == Slot::CONTEXT) { |
| int parameter_offset = StandardFrameConstants::kCallerSPOffset + |
| (num_parameters - 1 - i) * kPointerSize; |
| // Load parameter from stack. |
| __ mov(eax, Operand(ebp, parameter_offset)); |
| // Store it in the context. |
| int context_offset = Context::SlotOffset(slot->index()); |
| __ mov(Operand(esi, context_offset), eax); |
| // Update the write barrier. This clobbers all involved |
| // registers, so we have use a third register to avoid |
| // clobbering esi. |
| __ mov(ecx, esi); |
| __ RecordWrite(ecx, context_offset, eax, ebx); |
| } |
| } |
| } |
| |
| Variable* arguments = scope()->arguments(); |
| if (arguments != NULL) { |
| // Function uses arguments object. |
| Comment cmnt(masm_, "[ Allocate arguments object"); |
| if (function_in_register) { |
| __ push(edi); |
| } else { |
| __ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| } |
| // Receiver is just before the parameters on the caller's stack. |
| int offset = scope()->num_parameters() * kPointerSize; |
| __ lea(edx, |
| Operand(ebp, StandardFrameConstants::kCallerSPOffset + offset)); |
| __ push(edx); |
| __ push(Immediate(Smi::FromInt(scope()->num_parameters()))); |
| // Arguments to ArgumentsAccessStub: |
| // function, receiver address, parameter count. |
| // The stub will rewrite receiver and parameter count if the previous |
| // stack frame was an arguments adapter frame. |
| ArgumentsAccessStub stub(ArgumentsAccessStub::NEW_OBJECT); |
| __ CallStub(&stub); |
| __ mov(ecx, eax); // Duplicate result. |
| Move(arguments->AsSlot(), eax, ebx, edx); |
| Slot* dot_arguments_slot = scope()->arguments_shadow()->AsSlot(); |
| Move(dot_arguments_slot, ecx, ebx, edx); |
| } |
| |
| if (FLAG_trace) { |
| __ CallRuntime(Runtime::kTraceEnter, 0); |
| } |
| |
| // Visit the declarations and body unless there is an illegal |
| // redeclaration. |
| if (scope()->HasIllegalRedeclaration()) { |
| Comment cmnt(masm_, "[ Declarations"); |
| scope()->VisitIllegalRedeclaration(this); |
| |
| } else { |
| { Comment cmnt(masm_, "[ Declarations"); |
| // For named function expressions, declare the function name as a |
| // constant. |
| if (scope()->is_function_scope() && scope()->function() != NULL) { |
| EmitDeclaration(scope()->function(), Variable::CONST, NULL); |
| } |
| VisitDeclarations(scope()->declarations()); |
| } |
| |
| { Comment cmnt(masm_, "[ Stack check"); |
| PrepareForBailout(info->function(), NO_REGISTERS); |
| NearLabel ok; |
| ExternalReference stack_limit = |
| ExternalReference::address_of_stack_limit(); |
| __ cmp(esp, Operand::StaticVariable(stack_limit)); |
| __ j(above_equal, &ok, taken); |
| StackCheckStub stub; |
| __ CallStub(&stub); |
| __ bind(&ok); |
| } |
| |
| { Comment cmnt(masm_, "[ Body"); |
| ASSERT(loop_depth() == 0); |
| VisitStatements(function()->body()); |
| ASSERT(loop_depth() == 0); |
| } |
| } |
| |
| // Always emit a 'return undefined' in case control fell off the end of |
| // the body. |
| { Comment cmnt(masm_, "[ return <undefined>;"); |
| __ mov(eax, Factory::undefined_value()); |
| EmitReturnSequence(); |
| } |
| } |
| |
| |
| void FullCodeGenerator::ClearAccumulator() { |
| __ Set(eax, Immediate(Smi::FromInt(0))); |
| } |
| |
| |
| void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt) { |
| Comment cmnt(masm_, "[ Stack check"); |
| NearLabel ok; |
| ExternalReference stack_limit = ExternalReference::address_of_stack_limit(); |
| __ cmp(esp, Operand::StaticVariable(stack_limit)); |
| __ j(above_equal, &ok, taken); |
| StackCheckStub stub; |
| __ CallStub(&stub); |
| // 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. |
| RecordStackCheck(stmt->OsrEntryId()); |
| |
| // Loop stack checks can be patched to perform on-stack replacement. In |
| // order to decide whether or not to perform OSR we embed the loop depth |
| // in a test instruction after the call so we can extract it from the OSR |
| // builtin. |
| ASSERT(loop_depth() > 0); |
| __ test(eax, Immediate(Min(loop_depth(), Code::kMaxLoopNestingMarker))); |
| |
| __ bind(&ok); |
| PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS); |
| // Record a mapping of the OSR id to this PC. This is used if the OSR |
| // entry becomes the target of a bailout. We don't expect it to be, but |
| // we want it to work if it is. |
| PrepareForBailoutForId(stmt->OsrEntryId(), NO_REGISTERS); |
| } |
| |
| |
| void FullCodeGenerator::EmitReturnSequence() { |
| Comment cmnt(masm_, "[ Return sequence"); |
| if (return_label_.is_bound()) { |
| __ jmp(&return_label_); |
| } else { |
| // Common return label |
| __ bind(&return_label_); |
| if (FLAG_trace) { |
| __ push(eax); |
| __ CallRuntime(Runtime::kTraceExit, 1); |
| } |
| #ifdef DEBUG |
| // Add a label for checking the size of the code used for returning. |
| Label check_exit_codesize; |
| masm_->bind(&check_exit_codesize); |
| #endif |
| SetSourcePosition(function()->end_position() - 1); |
| __ RecordJSReturn(); |
| // Do not use the leave instruction here because it is too short to |
| // patch with the code required by the debugger. |
| __ mov(esp, ebp); |
| __ pop(ebp); |
| |
| int arguments_bytes = (scope()->num_parameters() + 1) * kPointerSize; |
| __ Ret(arguments_bytes, ecx); |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| // Check that the size of the code used for returning is large enough |
| // for the debugger's requirements. |
| ASSERT(Assembler::kJSReturnSequenceLength <= |
| masm_->SizeOfCodeGeneratedSince(&check_exit_codesize)); |
| #endif |
| } |
| } |
| |
| |
| void FullCodeGenerator::EffectContext::Plug(Slot* slot) const { |
| } |
| |
| |
| void FullCodeGenerator::AccumulatorValueContext::Plug(Slot* slot) const { |
| MemOperand slot_operand = codegen()->EmitSlotSearch(slot, result_register()); |
| __ mov(result_register(), slot_operand); |
| } |
| |
| |
| void FullCodeGenerator::StackValueContext::Plug(Slot* slot) const { |
| MemOperand slot_operand = codegen()->EmitSlotSearch(slot, result_register()); |
| // Memory operands can be pushed directly. |
| __ push(slot_operand); |
| } |
| |
| |
| void FullCodeGenerator::TestContext::Plug(Slot* slot) const { |
| // For simplicity we always test the accumulator register. |
| codegen()->Move(result_register(), slot); |
| codegen()->PrepareForBailoutBeforeSplit(TOS_REG, false, NULL, NULL); |
| codegen()->DoTest(true_label_, false_label_, fall_through_); |
| } |
| |
| |
| void FullCodeGenerator::EffectContext::Plug(Heap::RootListIndex index) const { |
| UNREACHABLE(); // Not used on IA32. |
| } |
| |
| |
| void FullCodeGenerator::AccumulatorValueContext::Plug( |
| Heap::RootListIndex index) const { |
| UNREACHABLE(); // Not used on IA32. |
| } |
| |
| |
| void FullCodeGenerator::StackValueContext::Plug( |
| Heap::RootListIndex index) const { |
| UNREACHABLE(); // Not used on IA32. |
| } |
| |
| |
| void FullCodeGenerator::TestContext::Plug(Heap::RootListIndex index) const { |
| UNREACHABLE(); // Not used on IA32. |
| } |
| |
| |
| void FullCodeGenerator::EffectContext::Plug(Handle<Object> lit) const { |
| } |
| |
| |
| void FullCodeGenerator::AccumulatorValueContext::Plug( |
| Handle<Object> lit) const { |
| __ Set(result_register(), Immediate(lit)); |
| } |
| |
| |
| void FullCodeGenerator::StackValueContext::Plug(Handle<Object> lit) const { |
| // Immediates can be pushed directly. |
| __ push(Immediate(lit)); |
| } |
| |
| |
| void FullCodeGenerator::TestContext::Plug(Handle<Object> lit) const { |
| codegen()->PrepareForBailoutBeforeSplit(TOS_REG, |
| true, |
| true_label_, |
| false_label_); |
| ASSERT(!lit->IsUndetectableObject()); // There are no undetectable literals. |
| if (lit->IsUndefined() || lit->IsNull() || lit->IsFalse()) { |
| if (false_label_ != fall_through_) __ jmp(false_label_); |
| } else if (lit->IsTrue() || lit->IsJSObject()) { |
| if (true_label_ != fall_through_) __ jmp(true_label_); |
| } else if (lit->IsString()) { |
| if (String::cast(*lit)->length() == 0) { |
| if (false_label_ != fall_through_) __ jmp(false_label_); |
| } else { |
| if (true_label_ != fall_through_) __ jmp(true_label_); |
| } |
| } else if (lit->IsSmi()) { |
| if (Smi::cast(*lit)->value() == 0) { |
| if (false_label_ != fall_through_) __ jmp(false_label_); |
| } else { |
| if (true_label_ != fall_through_) __ jmp(true_label_); |
| } |
| } else { |
| // For simplicity we always test the accumulator register. |
| __ mov(result_register(), lit); |
| codegen()->DoTest(true_label_, false_label_, fall_through_); |
| } |
| } |
| |
| |
| void FullCodeGenerator::EffectContext::DropAndPlug(int count, |
| Register reg) const { |
| ASSERT(count > 0); |
| __ Drop(count); |
| } |
| |
| |
| void FullCodeGenerator::AccumulatorValueContext::DropAndPlug( |
| int count, |
| Register reg) const { |
| ASSERT(count > 0); |
| __ Drop(count); |
| __ Move(result_register(), reg); |
| } |
| |
| |
| void FullCodeGenerator::StackValueContext::DropAndPlug(int count, |
| Register reg) const { |
| ASSERT(count > 0); |
| if (count > 1) __ Drop(count - 1); |
| __ mov(Operand(esp, 0), reg); |
| } |
| |
| |
| void FullCodeGenerator::TestContext::DropAndPlug(int count, |
| Register reg) const { |
| ASSERT(count > 0); |
| // For simplicity we always test the accumulator register. |
| __ Drop(count); |
| __ Move(result_register(), reg); |
| codegen()->PrepareForBailoutBeforeSplit(TOS_REG, false, NULL, NULL); |
| codegen()->DoTest(true_label_, false_label_, fall_through_); |
| } |
| |
| |
| void FullCodeGenerator::EffectContext::Plug(Label* materialize_true, |
| Label* materialize_false) const { |
| ASSERT(materialize_true == materialize_false); |
| __ bind(materialize_true); |
| } |
| |
| |
| void FullCodeGenerator::AccumulatorValueContext::Plug( |
| Label* materialize_true, |
| Label* materialize_false) const { |
| NearLabel done; |
| __ bind(materialize_true); |
| __ mov(result_register(), Factory::true_value()); |
| __ jmp(&done); |
| __ bind(materialize_false); |
| __ mov(result_register(), Factory::false_value()); |
| __ bind(&done); |
| } |
| |
| |
| void FullCodeGenerator::StackValueContext::Plug( |
| Label* materialize_true, |
| Label* materialize_false) const { |
| NearLabel done; |
| __ bind(materialize_true); |
| __ push(Immediate(Factory::true_value())); |
| __ jmp(&done); |
| __ bind(materialize_false); |
| __ push(Immediate(Factory::false_value())); |
| __ bind(&done); |
| } |
| |
| |
| void FullCodeGenerator::TestContext::Plug(Label* materialize_true, |
| Label* materialize_false) const { |
| ASSERT(materialize_true == true_label_); |
| ASSERT(materialize_false == false_label_); |
| } |
| |
| |
| void FullCodeGenerator::EffectContext::Plug(bool flag) const { |
| } |
| |
| |
| void FullCodeGenerator::AccumulatorValueContext::Plug(bool flag) const { |
| Handle<Object> value = |
| flag ? Factory::true_value() : Factory::false_value(); |
| __ mov(result_register(), value); |
| } |
| |
| |
| void FullCodeGenerator::StackValueContext::Plug(bool flag) const { |
| Handle<Object> value = |
| flag ? Factory::true_value() : Factory::false_value(); |
| __ push(Immediate(value)); |
| } |
| |
| |
| void FullCodeGenerator::TestContext::Plug(bool flag) const { |
| codegen()->PrepareForBailoutBeforeSplit(TOS_REG, |
| 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(Label* if_true, |
| Label* if_false, |
| Label* fall_through) { |
| // Emit the inlined tests assumed by the stub. |
| __ cmp(result_register(), Factory::undefined_value()); |
| __ j(equal, if_false); |
| __ cmp(result_register(), Factory::true_value()); |
| __ j(equal, if_true); |
| __ cmp(result_register(), Factory::false_value()); |
| __ j(equal, if_false); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ test(result_register(), Operand(result_register())); |
| __ j(zero, if_false); |
| __ test(result_register(), Immediate(kSmiTagMask)); |
| __ j(zero, if_true); |
| |
| // Call the ToBoolean stub for all other cases. |
| ToBooleanStub stub; |
| __ push(result_register()); |
| __ CallStub(&stub); |
| __ test(eax, Operand(eax)); |
| |
| // The stub returns nonzero for true. |
| Split(not_zero, if_true, if_false, fall_through); |
| } |
| |
| |
| void FullCodeGenerator::Split(Condition cc, |
| Label* if_true, |
| Label* if_false, |
| Label* fall_through) { |
| if (if_false == fall_through) { |
| __ j(cc, if_true); |
| } else if (if_true == fall_through) { |
| __ j(NegateCondition(cc), if_false); |
| } else { |
| __ j(cc, if_true); |
| __ jmp(if_false); |
| } |
| } |
| |
| |
| MemOperand FullCodeGenerator::EmitSlotSearch(Slot* slot, Register scratch) { |
| switch (slot->type()) { |
| case Slot::PARAMETER: |
| case Slot::LOCAL: |
| return Operand(ebp, SlotOffset(slot)); |
| case Slot::CONTEXT: { |
| int context_chain_length = |
| scope()->ContextChainLength(slot->var()->scope()); |
| __ LoadContext(scratch, context_chain_length); |
| return ContextOperand(scratch, slot->index()); |
| } |
| case Slot::LOOKUP: |
| UNREACHABLE(); |
| } |
| UNREACHABLE(); |
| return Operand(eax, 0); |
| } |
| |
| |
| void FullCodeGenerator::Move(Register destination, Slot* source) { |
| MemOperand location = EmitSlotSearch(source, destination); |
| __ mov(destination, location); |
| } |
| |
| |
| void FullCodeGenerator::Move(Slot* dst, |
| Register src, |
| Register scratch1, |
| Register scratch2) { |
| ASSERT(dst->type() != Slot::LOOKUP); // Not yet implemented. |
| ASSERT(!scratch1.is(src) && !scratch2.is(src)); |
| MemOperand location = EmitSlotSearch(dst, scratch1); |
| __ mov(location, src); |
| // Emit the write barrier code if the location is in the heap. |
| if (dst->type() == Slot::CONTEXT) { |
| int offset = Context::SlotOffset(dst->index()); |
| ASSERT(!scratch1.is(esi) && !src.is(esi) && !scratch2.is(esi)); |
| __ RecordWrite(scratch1, offset, src, scratch2); |
| } |
| } |
| |
| |
| void FullCodeGenerator::PrepareForBailoutBeforeSplit(State state, |
| bool should_normalize, |
| Label* if_true, |
| Label* if_false) { |
| // Only prepare for bailouts before splits if we're in a test |
| // context. Otherwise, we let the Visit function deal with the |
| // preparation to avoid preparing with the same AST id twice. |
| if (!context()->IsTest() || !info_->IsOptimizable()) return; |
| |
| NearLabel skip; |
| if (should_normalize) __ jmp(&skip); |
| |
| ForwardBailoutStack* current = forward_bailout_stack_; |
| while (current != NULL) { |
| PrepareForBailout(current->expr(), state); |
| current = current->parent(); |
| } |
| |
| if (should_normalize) { |
| __ cmp(eax, Factory::true_value()); |
| Split(equal, if_true, if_false, NULL); |
| __ bind(&skip); |
| } |
| } |
| |
| |
| void FullCodeGenerator::EmitDeclaration(Variable* variable, |
| Variable::Mode mode, |
| FunctionLiteral* function) { |
| Comment cmnt(masm_, "[ Declaration"); |
| ASSERT(variable != NULL); // Must have been resolved. |
| Slot* slot = variable->AsSlot(); |
| Property* prop = variable->AsProperty(); |
| |
| if (slot != NULL) { |
| switch (slot->type()) { |
| case Slot::PARAMETER: |
| case Slot::LOCAL: |
| if (mode == Variable::CONST) { |
| __ mov(Operand(ebp, SlotOffset(slot)), |
| Immediate(Factory::the_hole_value())); |
| } else if (function != NULL) { |
| VisitForAccumulatorValue(function); |
| __ mov(Operand(ebp, SlotOffset(slot)), result_register()); |
| } |
| break; |
| |
| case Slot::CONTEXT: |
| // We bypass the general EmitSlotSearch because we know more about |
| // this specific context. |
| |
| // The variable in the decl always resides in the current function |
| // context. |
| ASSERT_EQ(0, scope()->ContextChainLength(variable->scope())); |
| if (FLAG_debug_code) { |
| // Check that we're not inside a 'with'. |
| __ mov(ebx, ContextOperand(esi, Context::FCONTEXT_INDEX)); |
| __ cmp(ebx, Operand(esi)); |
| __ Check(equal, "Unexpected declaration in current context."); |
| } |
| if (mode == Variable::CONST) { |
| __ mov(ContextOperand(esi, slot->index()), |
| Immediate(Factory::the_hole_value())); |
| // No write barrier since the hole value is in old space. |
| } else if (function != NULL) { |
| VisitForAccumulatorValue(function); |
| __ mov(ContextOperand(esi, slot->index()), result_register()); |
| int offset = Context::SlotOffset(slot->index()); |
| __ mov(ebx, esi); |
| __ RecordWrite(ebx, offset, result_register(), ecx); |
| } |
| break; |
| |
| case Slot::LOOKUP: { |
| __ push(esi); |
| __ push(Immediate(variable->name())); |
| // Declaration nodes are always introduced in one of two modes. |
| ASSERT(mode == Variable::VAR || mode == Variable::CONST); |
| PropertyAttributes attr = (mode == Variable::VAR) ? NONE : READ_ONLY; |
| __ push(Immediate(Smi::FromInt(attr))); |
| // Push initial value, if any. |
| // Note: For variables we must not push an initial value (such as |
| // 'undefined') because we may have a (legal) redeclaration and we |
| // must not destroy the current value. |
| if (mode == Variable::CONST) { |
| __ push(Immediate(Factory::the_hole_value())); |
| } else if (function != NULL) { |
| VisitForStackValue(function); |
| } else { |
| __ push(Immediate(Smi::FromInt(0))); // No initial value! |
| } |
| __ CallRuntime(Runtime::kDeclareContextSlot, 4); |
| break; |
| } |
| } |
| |
| } else if (prop != NULL) { |
| if (function != NULL || mode == Variable::CONST) { |
| // We are declaring a function or constant that rewrites to a |
| // property. Use (keyed) IC to set the initial value. We cannot |
| // visit the rewrite because it's shared and we risk recording |
| // duplicate AST IDs for bailouts from optimized code. |
| ASSERT(prop->obj()->AsVariableProxy() != NULL); |
| { AccumulatorValueContext for_object(this); |
| EmitVariableLoad(prop->obj()->AsVariableProxy()->var()); |
| } |
| |
| if (function != NULL) { |
| __ push(eax); |
| VisitForAccumulatorValue(function); |
| __ pop(edx); |
| } else { |
| __ mov(edx, eax); |
| __ mov(eax, Factory::the_hole_value()); |
| } |
| ASSERT(prop->key()->AsLiteral() != NULL && |
| prop->key()->AsLiteral()->handle()->IsSmi()); |
| __ Set(ecx, Immediate(prop->key()->AsLiteral()->handle())); |
| |
| Handle<Code> ic(Builtins::builtin(is_strict() |
| ? Builtins::KeyedStoreIC_Initialize_Strict |
| : Builtins::KeyedStoreIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| } |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitDeclaration(Declaration* decl) { |
| EmitDeclaration(decl->proxy()->var(), decl->mode(), decl->fun()); |
| } |
| |
| |
| void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) { |
| // Call the runtime to declare the globals. |
| __ push(esi); // The context is the first argument. |
| __ push(Immediate(pairs)); |
| __ push(Immediate(Smi::FromInt(is_eval() ? 1 : 0))); |
| __ push(Immediate(Smi::FromInt(strict_mode_flag()))); |
| __ CallRuntime(Runtime::kDeclareGlobals, 4); |
| // Return value is ignored. |
| } |
| |
| |
| void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) { |
| Comment cmnt(masm_, "[ SwitchStatement"); |
| Breakable nested_statement(this, stmt); |
| SetStatementPosition(stmt); |
| |
| // Keep the switch value on the stack until a case matches. |
| VisitForStackValue(stmt->tag()); |
| PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS); |
| |
| ZoneList<CaseClause*>* clauses = stmt->cases(); |
| CaseClause* default_clause = NULL; // Can occur anywhere in the list. |
| |
| Label next_test; // Recycled for each test. |
| // Compile all the tests with branches to their bodies. |
| for (int i = 0; i < clauses->length(); i++) { |
| CaseClause* clause = clauses->at(i); |
| clause->body_target()->entry_label()->Unuse(); |
| |
| // The default is not a test, but remember it as final fall through. |
| if (clause->is_default()) { |
| default_clause = clause; |
| continue; |
| } |
| |
| Comment cmnt(masm_, "[ Case comparison"); |
| __ bind(&next_test); |
| next_test.Unuse(); |
| |
| // Compile the label expression. |
| VisitForAccumulatorValue(clause->label()); |
| |
| // Perform the comparison as if via '==='. |
| __ mov(edx, Operand(esp, 0)); // Switch value. |
| bool inline_smi_code = ShouldInlineSmiCase(Token::EQ_STRICT); |
| JumpPatchSite patch_site(masm_); |
| if (inline_smi_code) { |
| NearLabel slow_case; |
| __ mov(ecx, edx); |
| __ or_(ecx, Operand(eax)); |
| patch_site.EmitJumpIfNotSmi(ecx, &slow_case); |
| |
| __ cmp(edx, Operand(eax)); |
| __ j(not_equal, &next_test); |
| __ Drop(1); // Switch value is no longer needed. |
| __ jmp(clause->body_target()->entry_label()); |
| __ bind(&slow_case); |
| } |
| |
| // Record position before stub call for type feedback. |
| SetSourcePosition(clause->position()); |
| Handle<Code> ic = CompareIC::GetUninitialized(Token::EQ_STRICT); |
| EmitCallIC(ic, &patch_site); |
| __ test(eax, Operand(eax)); |
| __ j(not_equal, &next_test); |
| __ Drop(1); // Switch value is no longer needed. |
| __ jmp(clause->body_target()->entry_label()); |
| } |
| |
| // Discard the test value and jump to the default if present, otherwise to |
| // the end of the statement. |
| __ bind(&next_test); |
| __ Drop(1); // Switch value is no longer needed. |
| if (default_clause == NULL) { |
| __ jmp(nested_statement.break_target()); |
| } else { |
| __ jmp(default_clause->body_target()->entry_label()); |
| } |
| |
| // 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()->entry_label()); |
| VisitStatements(clause->statements()); |
| } |
| |
| __ bind(nested_statement.break_target()); |
| PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS); |
| } |
| |
| |
| void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) { |
| Comment cmnt(masm_, "[ ForInStatement"); |
| SetStatementPosition(stmt); |
| |
| Label loop, exit; |
| ForIn loop_statement(this, stmt); |
| increment_loop_depth(); |
| |
| // Get the object to enumerate over. Both SpiderMonkey and JSC |
| // ignore null and undefined in contrast to the specification; see |
| // ECMA-262 section 12.6.4. |
| VisitForAccumulatorValue(stmt->enumerable()); |
| __ cmp(eax, Factory::undefined_value()); |
| __ j(equal, &exit); |
| __ cmp(eax, Factory::null_value()); |
| __ j(equal, &exit); |
| |
| // Convert the object to a JS object. |
| NearLabel convert, done_convert; |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(zero, &convert); |
| __ CmpObjectType(eax, FIRST_JS_OBJECT_TYPE, ecx); |
| __ j(above_equal, &done_convert); |
| __ bind(&convert); |
| __ push(eax); |
| __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| __ bind(&done_convert); |
| __ push(eax); |
| |
| // Check cache validity in generated code. This is a fast case for |
| // the JSObject::IsSimpleEnum cache validity checks. If we cannot |
| // guarantee cache validity, call the runtime system to check cache |
| // validity or get the property names in a fixed array. |
| Label next, call_runtime; |
| __ mov(ecx, eax); |
| __ bind(&next); |
| |
| // Check that there are no elements. Register ecx contains the |
| // current JS object we've reached through the prototype chain. |
| __ cmp(FieldOperand(ecx, JSObject::kElementsOffset), |
| Factory::empty_fixed_array()); |
| __ j(not_equal, &call_runtime); |
| |
| // Check that instance descriptors are not empty so that we can |
| // check for an enum cache. Leave the map in ebx for the subsequent |
| // prototype load. |
| __ mov(ebx, FieldOperand(ecx, HeapObject::kMapOffset)); |
| __ mov(edx, FieldOperand(ebx, Map::kInstanceDescriptorsOffset)); |
| __ cmp(edx, Factory::empty_descriptor_array()); |
| __ j(equal, &call_runtime); |
| |
| // Check that there is an enum cache in the non-empty instance |
| // descriptors (edx). This is the case if the next enumeration |
| // index field does not contain a smi. |
| __ mov(edx, FieldOperand(edx, DescriptorArray::kEnumerationIndexOffset)); |
| __ test(edx, Immediate(kSmiTagMask)); |
| __ j(zero, &call_runtime); |
| |
| // For all objects but the receiver, check that the cache is empty. |
| NearLabel check_prototype; |
| __ cmp(ecx, Operand(eax)); |
| __ j(equal, &check_prototype); |
| __ mov(edx, FieldOperand(edx, DescriptorArray::kEnumCacheBridgeCacheOffset)); |
| __ cmp(edx, Factory::empty_fixed_array()); |
| __ j(not_equal, &call_runtime); |
| |
| // Load the prototype from the map and loop if non-null. |
| __ bind(&check_prototype); |
| __ mov(ecx, FieldOperand(ebx, Map::kPrototypeOffset)); |
| __ cmp(ecx, Factory::null_value()); |
| __ j(not_equal, &next); |
| |
| // The enum cache is valid. Load the map of the object being |
| // iterated over and use the cache for the iteration. |
| NearLabel use_cache; |
| __ mov(eax, FieldOperand(eax, HeapObject::kMapOffset)); |
| __ jmp(&use_cache); |
| |
| // Get the set of properties to enumerate. |
| __ bind(&call_runtime); |
| __ push(eax); // Duplicate the enumerable object on the stack. |
| __ CallRuntime(Runtime::kGetPropertyNamesFast, 1); |
| |
| // 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. |
| NearLabel fixed_array; |
| __ cmp(FieldOperand(eax, HeapObject::kMapOffset), Factory::meta_map()); |
| __ j(not_equal, &fixed_array); |
| |
| // We got a map in register eax. Get the enumeration cache from it. |
| __ bind(&use_cache); |
| __ mov(ecx, FieldOperand(eax, Map::kInstanceDescriptorsOffset)); |
| __ mov(ecx, FieldOperand(ecx, DescriptorArray::kEnumerationIndexOffset)); |
| __ mov(edx, FieldOperand(ecx, DescriptorArray::kEnumCacheBridgeCacheOffset)); |
| |
| // Setup the four remaining stack slots. |
| __ push(eax); // Map. |
| __ push(edx); // Enumeration cache. |
| __ mov(eax, FieldOperand(edx, FixedArray::kLengthOffset)); |
| __ push(eax); // Enumeration cache length (as smi). |
| __ push(Immediate(Smi::FromInt(0))); // Initial index. |
| __ jmp(&loop); |
| |
| // We got a fixed array in register eax. Iterate through that. |
| __ bind(&fixed_array); |
| __ push(Immediate(Smi::FromInt(0))); // Map (0) - force slow check. |
| __ push(eax); |
| __ mov(eax, FieldOperand(eax, FixedArray::kLengthOffset)); |
| __ push(eax); // Fixed array length (as smi). |
| __ push(Immediate(Smi::FromInt(0))); // Initial index. |
| |
| // Generate code for doing the condition check. |
| __ bind(&loop); |
| __ mov(eax, Operand(esp, 0 * kPointerSize)); // Get the current index. |
| __ cmp(eax, Operand(esp, 1 * kPointerSize)); // Compare to the array length. |
| __ j(above_equal, loop_statement.break_target()); |
| |
| // Get the current entry of the array into register ebx. |
| __ mov(ebx, Operand(esp, 2 * kPointerSize)); |
| __ mov(ebx, FieldOperand(ebx, eax, times_2, FixedArray::kHeaderSize)); |
| |
| // Get the expected map from the stack or a zero map in the |
| // permanent slow case into register edx. |
| __ mov(edx, Operand(esp, 3 * kPointerSize)); |
| |
| // Check if the expected map still matches that of the enumerable. |
| // If not, we have to filter the key. |
| NearLabel update_each; |
| __ mov(ecx, Operand(esp, 4 * kPointerSize)); |
| __ cmp(edx, FieldOperand(ecx, HeapObject::kMapOffset)); |
| __ j(equal, &update_each); |
| |
| // Convert the entry to a string or null if it isn't a property |
| // anymore. If the property has been removed while iterating, we |
| // just skip it. |
| __ push(ecx); // Enumerable. |
| __ push(ebx); // Current entry. |
| __ InvokeBuiltin(Builtins::FILTER_KEY, CALL_FUNCTION); |
| __ test(eax, Operand(eax)); |
| __ j(equal, loop_statement.continue_target()); |
| __ mov(ebx, Operand(eax)); |
| |
| // Update the 'each' property or variable from the possibly filtered |
| // entry in register ebx. |
| __ bind(&update_each); |
| __ mov(result_register(), ebx); |
| // Perform the assignment as if via '='. |
| { EffectContext context(this); |
| EmitAssignment(stmt->each(), stmt->AssignmentId()); |
| } |
| |
| // 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_target()); |
| __ add(Operand(esp, 0 * kPointerSize), Immediate(Smi::FromInt(1))); |
| |
| EmitStackCheck(stmt); |
| __ jmp(&loop); |
| |
| // Remove the pointers stored on the stack. |
| __ bind(loop_statement.break_target()); |
| __ add(Operand(esp), Immediate(5 * kPointerSize)); |
| |
| // Exit and decrement the loop depth. |
| __ bind(&exit); |
| decrement_loop_depth(); |
| } |
| |
| |
| void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info, |
| bool pretenure) { |
| // Use the fast case closure allocation code that allocates in new |
| // space for nested functions that don't need literals cloning. If |
| // we're running with the --always-opt or the --prepare-always-opt |
| // flag, we need to use the runtime function so that the new function |
| // we are creating here gets a chance to have its code optimized and |
| // doesn't just get a copy of the existing unoptimized code. |
| if (!FLAG_always_opt && |
| !FLAG_prepare_always_opt && |
| scope()->is_function_scope() && |
| info->num_literals() == 0 && |
| !pretenure) { |
| FastNewClosureStub stub; |
| __ push(Immediate(info)); |
| __ CallStub(&stub); |
| } else { |
| __ push(esi); |
| __ push(Immediate(info)); |
| __ push(Immediate(pretenure |
| ? Factory::true_value() |
| : Factory::false_value())); |
| __ CallRuntime(Runtime::kNewClosure, 3); |
| } |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) { |
| Comment cmnt(masm_, "[ VariableProxy"); |
| EmitVariableLoad(expr->var()); |
| } |
| |
| |
| void FullCodeGenerator::EmitLoadGlobalSlotCheckExtensions( |
| Slot* slot, |
| TypeofState typeof_state, |
| Label* slow) { |
| Register context = esi; |
| Register temp = edx; |
| |
| Scope* s = scope(); |
| while (s != NULL) { |
| if (s->num_heap_slots() > 0) { |
| if (s->calls_eval()) { |
| // Check that extension is NULL. |
| __ cmp(ContextOperand(context, Context::EXTENSION_INDEX), |
| Immediate(0)); |
| __ j(not_equal, slow); |
| } |
| // Load next context in chain. |
| __ mov(temp, ContextOperand(context, Context::CLOSURE_INDEX)); |
| __ mov(temp, FieldOperand(temp, JSFunction::kContextOffset)); |
| // Walk the rest of the chain without clobbering esi. |
| context = temp; |
| } |
| // If no outer scope calls eval, we do not need to check more |
| // context extensions. If we have reached an eval scope, we check |
| // all extensions from this point. |
| if (!s->outer_scope_calls_eval() || s->is_eval_scope()) break; |
| s = s->outer_scope(); |
| } |
| |
| if (s != NULL && s->is_eval_scope()) { |
| // Loop up the context chain. There is no frame effect so it is |
| // safe to use raw labels here. |
| NearLabel next, fast; |
| if (!context.is(temp)) { |
| __ mov(temp, context); |
| } |
| __ bind(&next); |
| // Terminate at global context. |
| __ cmp(FieldOperand(temp, HeapObject::kMapOffset), |
| Immediate(Factory::global_context_map())); |
| __ j(equal, &fast); |
| // Check that extension is NULL. |
| __ cmp(ContextOperand(temp, Context::EXTENSION_INDEX), Immediate(0)); |
| __ j(not_equal, slow); |
| // Load next context in chain. |
| __ mov(temp, ContextOperand(temp, Context::CLOSURE_INDEX)); |
| __ mov(temp, FieldOperand(temp, JSFunction::kContextOffset)); |
| __ jmp(&next); |
| __ bind(&fast); |
| } |
| |
| // All extension objects were empty and it is safe to use a global |
| // load IC call. |
| __ mov(eax, GlobalObjectOperand()); |
| __ mov(ecx, slot->var()->name()); |
| Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize)); |
| RelocInfo::Mode mode = (typeof_state == INSIDE_TYPEOF) |
| ? RelocInfo::CODE_TARGET |
| : RelocInfo::CODE_TARGET_CONTEXT; |
| EmitCallIC(ic, mode); |
| } |
| |
| |
| MemOperand FullCodeGenerator::ContextSlotOperandCheckExtensions( |
| Slot* slot, |
| Label* slow) { |
| ASSERT(slot->type() == Slot::CONTEXT); |
| Register context = esi; |
| Register temp = ebx; |
| |
| for (Scope* s = scope(); s != slot->var()->scope(); s = s->outer_scope()) { |
| if (s->num_heap_slots() > 0) { |
| if (s->calls_eval()) { |
| // Check that extension is NULL. |
| __ cmp(ContextOperand(context, Context::EXTENSION_INDEX), |
| Immediate(0)); |
| __ j(not_equal, slow); |
| } |
| __ mov(temp, ContextOperand(context, Context::CLOSURE_INDEX)); |
| __ mov(temp, FieldOperand(temp, JSFunction::kContextOffset)); |
| // Walk the rest of the chain without clobbering esi. |
| context = temp; |
| } |
| } |
| // Check that last extension is NULL. |
| __ cmp(ContextOperand(context, Context::EXTENSION_INDEX), Immediate(0)); |
| __ j(not_equal, slow); |
| |
| // This function is used only for loads, not stores, so it's safe to |
| // return an esi-based operand (the write barrier cannot be allowed to |
| // destroy the esi register). |
| return ContextOperand(context, slot->index()); |
| } |
| |
| |
| void FullCodeGenerator::EmitDynamicLoadFromSlotFastCase( |
| Slot* slot, |
| TypeofState typeof_state, |
| Label* slow, |
| Label* done) { |
| // Generate fast-case code for variables that might be shadowed by |
| // eval-introduced variables. Eval is used a lot without |
| // introducing variables. In those cases, we do not want to |
| // perform a runtime call for all variables in the scope |
| // containing the eval. |
| if (slot->var()->mode() == Variable::DYNAMIC_GLOBAL) { |
| EmitLoadGlobalSlotCheckExtensions(slot, typeof_state, slow); |
| __ jmp(done); |
| } else if (slot->var()->mode() == Variable::DYNAMIC_LOCAL) { |
| Slot* potential_slot = slot->var()->local_if_not_shadowed()->AsSlot(); |
| Expression* rewrite = slot->var()->local_if_not_shadowed()->rewrite(); |
| if (potential_slot != NULL) { |
| // Generate fast case for locals that rewrite to slots. |
| __ mov(eax, |
| ContextSlotOperandCheckExtensions(potential_slot, slow)); |
| if (potential_slot->var()->mode() == Variable::CONST) { |
| __ cmp(eax, Factory::the_hole_value()); |
| __ j(not_equal, done); |
| __ mov(eax, Factory::undefined_value()); |
| } |
| __ jmp(done); |
| } else if (rewrite != NULL) { |
| // Generate fast case for calls of an argument function. |
| Property* property = rewrite->AsProperty(); |
| if (property != NULL) { |
| VariableProxy* obj_proxy = property->obj()->AsVariableProxy(); |
| Literal* key_literal = property->key()->AsLiteral(); |
| if (obj_proxy != NULL && |
| key_literal != NULL && |
| obj_proxy->IsArguments() && |
| key_literal->handle()->IsSmi()) { |
| // Load arguments object if there are no eval-introduced |
| // variables. Then load the argument from the arguments |
| // object using keyed load. |
| __ mov(edx, |
| ContextSlotOperandCheckExtensions(obj_proxy->var()->AsSlot(), |
| slow)); |
| __ mov(eax, Immediate(key_literal->handle())); |
| Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| __ jmp(done); |
| } |
| } |
| } |
| } |
| } |
| |
| |
| void FullCodeGenerator::EmitVariableLoad(Variable* var) { |
| // Four cases: non-this global variables, lookup slots, all other |
| // types of slots, and parameters that rewrite to explicit property |
| // accesses on the arguments object. |
| Slot* slot = var->AsSlot(); |
| Property* property = var->AsProperty(); |
| |
| if (var->is_global() && !var->is_this()) { |
| Comment cmnt(masm_, "Global variable"); |
| // Use inline caching. Variable name is passed in ecx and the global |
| // object on the stack. |
| __ mov(eax, GlobalObjectOperand()); |
| __ mov(ecx, var->name()); |
| Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET_CONTEXT); |
| context()->Plug(eax); |
| |
| } else if (slot != NULL && slot->type() == Slot::LOOKUP) { |
| Label done, slow; |
| |
| // Generate code for loading from variables potentially shadowed |
| // by eval-introduced variables. |
| EmitDynamicLoadFromSlotFastCase(slot, NOT_INSIDE_TYPEOF, &slow, &done); |
| |
| __ bind(&slow); |
| Comment cmnt(masm_, "Lookup slot"); |
| __ push(esi); // Context. |
| __ push(Immediate(var->name())); |
| __ CallRuntime(Runtime::kLoadContextSlot, 2); |
| __ bind(&done); |
| |
| context()->Plug(eax); |
| |
| } else if (slot != NULL) { |
| Comment cmnt(masm_, (slot->type() == Slot::CONTEXT) |
| ? "Context slot" |
| : "Stack slot"); |
| if (var->mode() == Variable::CONST) { |
| // Constants may be the hole value if they have not been initialized. |
| // Unhole them. |
| NearLabel done; |
| MemOperand slot_operand = EmitSlotSearch(slot, eax); |
| __ mov(eax, slot_operand); |
| __ cmp(eax, Factory::the_hole_value()); |
| __ j(not_equal, &done); |
| __ mov(eax, Factory::undefined_value()); |
| __ bind(&done); |
| context()->Plug(eax); |
| } else { |
| context()->Plug(slot); |
| } |
| |
| } else { |
| Comment cmnt(masm_, "Rewritten parameter"); |
| ASSERT_NOT_NULL(property); |
| // Rewritten parameter accesses are of the form "slot[literal]". |
| |
| // Assert that the object is in a slot. |
| Variable* object_var = property->obj()->AsVariableProxy()->AsVariable(); |
| ASSERT_NOT_NULL(object_var); |
| Slot* object_slot = object_var->AsSlot(); |
| ASSERT_NOT_NULL(object_slot); |
| |
| // Load the object. |
| MemOperand object_loc = EmitSlotSearch(object_slot, eax); |
| __ mov(edx, object_loc); |
| |
| // Assert that the key is a smi. |
| Literal* key_literal = property->key()->AsLiteral(); |
| ASSERT_NOT_NULL(key_literal); |
| ASSERT(key_literal->handle()->IsSmi()); |
| |
| // Load the key. |
| __ mov(eax, Immediate(key_literal->handle())); |
| |
| // Do a keyed property load. |
| Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| |
| // Drop key and object left on the stack by IC. |
| context()->Plug(eax); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) { |
| Comment cmnt(masm_, "[ RegExpLiteral"); |
| NearLabel materialized; |
| // Registers will be used as follows: |
| // edi = JS function. |
| // ecx = literals array. |
| // ebx = regexp literal. |
| // eax = regexp literal clone. |
| __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ mov(ecx, FieldOperand(edi, JSFunction::kLiteralsOffset)); |
| int literal_offset = |
| FixedArray::kHeaderSize + expr->literal_index() * kPointerSize; |
| __ mov(ebx, FieldOperand(ecx, literal_offset)); |
| __ cmp(ebx, Factory::undefined_value()); |
| __ j(not_equal, &materialized); |
| |
| // Create regexp literal using runtime function |
| // Result will be in eax. |
| __ push(ecx); |
| __ push(Immediate(Smi::FromInt(expr->literal_index()))); |
| __ push(Immediate(expr->pattern())); |
| __ push(Immediate(expr->flags())); |
| __ CallRuntime(Runtime::kMaterializeRegExpLiteral, 4); |
| __ mov(ebx, eax); |
| |
| __ bind(&materialized); |
| int size = JSRegExp::kSize + JSRegExp::kInObjectFieldCount * kPointerSize; |
| Label allocated, runtime_allocate; |
| __ AllocateInNewSpace(size, eax, ecx, edx, &runtime_allocate, TAG_OBJECT); |
| __ jmp(&allocated); |
| |
| __ bind(&runtime_allocate); |
| __ push(ebx); |
| __ push(Immediate(Smi::FromInt(size))); |
| __ CallRuntime(Runtime::kAllocateInNewSpace, 1); |
| __ pop(ebx); |
| |
| __ bind(&allocated); |
| // Copy the content into the newly allocated memory. |
| // (Unroll copy loop once for better throughput). |
| for (int i = 0; i < size - kPointerSize; i += 2 * kPointerSize) { |
| __ mov(edx, FieldOperand(ebx, i)); |
| __ mov(ecx, FieldOperand(ebx, i + kPointerSize)); |
| __ mov(FieldOperand(eax, i), edx); |
| __ mov(FieldOperand(eax, i + kPointerSize), ecx); |
| } |
| if ((size % (2 * kPointerSize)) != 0) { |
| __ mov(edx, FieldOperand(ebx, size - kPointerSize)); |
| __ mov(FieldOperand(eax, size - kPointerSize), edx); |
| } |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) { |
| Comment cmnt(masm_, "[ ObjectLiteral"); |
| __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ push(FieldOperand(edi, JSFunction::kLiteralsOffset)); |
| __ push(Immediate(Smi::FromInt(expr->literal_index()))); |
| __ push(Immediate(expr->constant_properties())); |
| __ push(Immediate(Smi::FromInt(expr->fast_elements() ? 1 : 0))); |
| if (expr->depth() > 1) { |
| __ CallRuntime(Runtime::kCreateObjectLiteral, 4); |
| } else { |
| __ CallRuntime(Runtime::kCreateObjectLiteralShallow, 4); |
| } |
| |
| // If result_saved is true the result is on top of the stack. If |
| // result_saved is false the result is in eax. |
| bool result_saved = false; |
| |
| // Mark all computed expressions that are bound to a key that |
| // is shadowed by a later occurrence of the same key. For the |
| // marked expressions, no store code is emitted. |
| expr->CalculateEmitStore(); |
| |
| for (int i = 0; i < expr->properties()->length(); i++) { |
| ObjectLiteral::Property* property = expr->properties()->at(i); |
| if (property->IsCompileTimeValue()) continue; |
| |
| Literal* key = property->key(); |
| Expression* value = property->value(); |
| if (!result_saved) { |
| __ push(eax); // Save result on the stack |
| result_saved = true; |
| } |
| switch (property->kind()) { |
| case ObjectLiteral::Property::MATERIALIZED_LITERAL: |
| ASSERT(!CompileTimeValue::IsCompileTimeValue(value)); |
| // Fall through. |
| case ObjectLiteral::Property::COMPUTED: |
| if (key->handle()->IsSymbol()) { |
| if (property->emit_store()) { |
| VisitForAccumulatorValue(value); |
| __ mov(ecx, Immediate(key->handle())); |
| __ mov(edx, Operand(esp, 0)); |
| Handle<Code> ic(Builtins::builtin( |
| is_strict() ? Builtins::StoreIC_Initialize_Strict |
| : Builtins::StoreIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| PrepareForBailoutForId(key->id(), NO_REGISTERS); |
| } else { |
| VisitForEffect(value); |
| } |
| break; |
| } |
| // Fall through. |
| case ObjectLiteral::Property::PROTOTYPE: |
| __ push(Operand(esp, 0)); // Duplicate receiver. |
| VisitForStackValue(key); |
| VisitForStackValue(value); |
| if (property->emit_store()) { |
| __ push(Immediate(Smi::FromInt(NONE))); // PropertyAttributes |
| __ CallRuntime(Runtime::kSetProperty, 4); |
| } else { |
| __ Drop(3); |
| } |
| break; |
| case ObjectLiteral::Property::SETTER: |
| case ObjectLiteral::Property::GETTER: |
| __ push(Operand(esp, 0)); // Duplicate receiver. |
| VisitForStackValue(key); |
| __ push(Immediate(property->kind() == ObjectLiteral::Property::SETTER ? |
| Smi::FromInt(1) : |
| Smi::FromInt(0))); |
| VisitForStackValue(value); |
| __ CallRuntime(Runtime::kDefineAccessor, 4); |
| break; |
| default: UNREACHABLE(); |
| } |
| } |
| |
| if (result_saved) { |
| context()->PlugTOS(); |
| } else { |
| context()->Plug(eax); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) { |
| Comment cmnt(masm_, "[ ArrayLiteral"); |
| |
| ZoneList<Expression*>* subexprs = expr->values(); |
| int length = subexprs->length(); |
| |
| __ mov(ebx, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ push(FieldOperand(ebx, JSFunction::kLiteralsOffset)); |
| __ push(Immediate(Smi::FromInt(expr->literal_index()))); |
| __ push(Immediate(expr->constant_elements())); |
| if (expr->constant_elements()->map() == Heap::fixed_cow_array_map()) { |
| ASSERT(expr->depth() == 1); |
| FastCloneShallowArrayStub stub( |
| FastCloneShallowArrayStub::COPY_ON_WRITE_ELEMENTS, length); |
| __ CallStub(&stub); |
| __ IncrementCounter(&Counters::cow_arrays_created_stub, 1); |
| } else if (expr->depth() > 1) { |
| __ CallRuntime(Runtime::kCreateArrayLiteral, 3); |
| } else if (length > FastCloneShallowArrayStub::kMaximumClonedLength) { |
| __ CallRuntime(Runtime::kCreateArrayLiteralShallow, 3); |
| } else { |
| FastCloneShallowArrayStub stub( |
| FastCloneShallowArrayStub::CLONE_ELEMENTS, length); |
| __ CallStub(&stub); |
| } |
| |
| bool result_saved = false; // Is the result saved to the stack? |
| |
| // Emit code to evaluate all the non-constant subexpressions and to store |
| // them into the newly cloned array. |
| for (int i = 0; i < length; i++) { |
| Expression* subexpr = subexprs->at(i); |
| // If the subexpression is a literal or a simple materialized literal it |
| // is already set in the cloned array. |
| if (subexpr->AsLiteral() != NULL || |
| CompileTimeValue::IsCompileTimeValue(subexpr)) { |
| continue; |
| } |
| |
| if (!result_saved) { |
| __ push(eax); |
| result_saved = true; |
| } |
| VisitForAccumulatorValue(subexpr); |
| |
| // Store the subexpression value in the array's elements. |
| __ mov(ebx, Operand(esp, 0)); // Copy of array literal. |
| __ mov(ebx, FieldOperand(ebx, JSObject::kElementsOffset)); |
| int offset = FixedArray::kHeaderSize + (i * kPointerSize); |
| __ mov(FieldOperand(ebx, offset), result_register()); |
| |
| // Update the write barrier for the array store. |
| __ RecordWrite(ebx, offset, result_register(), ecx); |
| |
| PrepareForBailoutForId(expr->GetIdForElement(i), NO_REGISTERS); |
| } |
| |
| if (result_saved) { |
| context()->PlugTOS(); |
| } else { |
| context()->Plug(eax); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitAssignment(Assignment* expr) { |
| Comment cmnt(masm_, "[ Assignment"); |
| // Invalid left-hand sides are rewritten to have a 'throw ReferenceError' |
| // on the left-hand side. |
| if (!expr->target()->IsValidLeftHandSide()) { |
| VisitForEffect(expr->target()); |
| return; |
| } |
| |
| // Left-hand side can only be a property, a global or a (parameter or local) |
| // slot. Variables with rewrite to .arguments are treated as KEYED_PROPERTY. |
| enum LhsKind { VARIABLE, NAMED_PROPERTY, KEYED_PROPERTY }; |
| LhsKind assign_type = VARIABLE; |
| Property* property = expr->target()->AsProperty(); |
| if (property != NULL) { |
| assign_type = (property->key()->IsPropertyName()) |
| ? NAMED_PROPERTY |
| : KEYED_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 accumulator. |
| VisitForAccumulatorValue(property->obj()); |
| __ push(result_register()); |
| } else { |
| VisitForStackValue(property->obj()); |
| } |
| break; |
| case KEYED_PROPERTY: { |
| if (expr->is_compound()) { |
| if (property->is_arguments_access()) { |
| VariableProxy* obj_proxy = property->obj()->AsVariableProxy(); |
| MemOperand slot_operand = |
| EmitSlotSearch(obj_proxy->var()->AsSlot(), ecx); |
| __ push(slot_operand); |
| __ mov(eax, Immediate(property->key()->AsLiteral()->handle())); |
| } else { |
| VisitForStackValue(property->obj()); |
| VisitForAccumulatorValue(property->key()); |
| } |
| __ mov(edx, Operand(esp, 0)); |
| __ push(eax); |
| } else { |
| if (property->is_arguments_access()) { |
| VariableProxy* obj_proxy = property->obj()->AsVariableProxy(); |
| MemOperand slot_operand = |
| EmitSlotSearch(obj_proxy->var()->AsSlot(), ecx); |
| __ push(slot_operand); |
| __ push(Immediate(property->key()->AsLiteral()->handle())); |
| } else { |
| VisitForStackValue(property->obj()); |
| VisitForStackValue(property->key()); |
| } |
| } |
| break; |
| } |
| } |
| |
| if (expr->is_compound()) { |
| { AccumulatorValueContext context(this); |
| switch (assign_type) { |
| case VARIABLE: |
| EmitVariableLoad(expr->target()->AsVariableProxy()->var()); |
| break; |
| case NAMED_PROPERTY: |
| EmitNamedPropertyLoad(property); |
| break; |
| case KEYED_PROPERTY: |
| EmitKeyedPropertyLoad(property); |
| break; |
| } |
| } |
| |
| // For property compound assignments we need another deoptimization |
| // point after the property load. |
| if (property != NULL) { |
| PrepareForBailoutForId(expr->CompoundLoadId(), TOS_REG); |
| } |
| |
| Token::Value op = expr->binary_op(); |
| __ push(eax); // Left operand goes on the stack. |
| VisitForAccumulatorValue(expr->value()); |
| |
| OverwriteMode mode = expr->value()->ResultOverwriteAllowed() |
| ? OVERWRITE_RIGHT |
| : NO_OVERWRITE; |
| SetSourcePosition(expr->position() + 1); |
| AccumulatorValueContext context(this); |
| if (ShouldInlineSmiCase(op)) { |
| EmitInlineSmiBinaryOp(expr, |
| op, |
| mode, |
| expr->target(), |
| expr->value()); |
| } else { |
| EmitBinaryOp(op, mode); |
| } |
| |
| // Deoptimization point in case the binary operation may have side effects. |
| PrepareForBailout(expr->binary_operation(), TOS_REG); |
| } else { |
| VisitForAccumulatorValue(expr->value()); |
| } |
| |
| // Record source position before possible IC call. |
| SetSourcePosition(expr->position()); |
| |
| // Store the value. |
| switch (assign_type) { |
| case VARIABLE: |
| EmitVariableAssignment(expr->target()->AsVariableProxy()->var(), |
| expr->op()); |
| PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| context()->Plug(eax); |
| break; |
| case NAMED_PROPERTY: |
| EmitNamedPropertyAssignment(expr); |
| break; |
| case KEYED_PROPERTY: |
| EmitKeyedPropertyAssignment(expr); |
| break; |
| } |
| } |
| |
| |
| void FullCodeGenerator::EmitNamedPropertyLoad(Property* prop) { |
| SetSourcePosition(prop->position()); |
| Literal* key = prop->key()->AsLiteral(); |
| __ mov(ecx, Immediate(key->handle())); |
| Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| } |
| |
| |
| void FullCodeGenerator::EmitKeyedPropertyLoad(Property* prop) { |
| SetSourcePosition(prop->position()); |
| Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| } |
| |
| |
| void FullCodeGenerator::EmitInlineSmiBinaryOp(Expression* expr, |
| Token::Value op, |
| OverwriteMode mode, |
| Expression* left, |
| Expression* right) { |
| // Do combined smi check of the operands. Left operand is on the |
| // stack. Right operand is in eax. |
| NearLabel done, smi_case, stub_call; |
| __ pop(edx); |
| __ mov(ecx, eax); |
| __ or_(eax, Operand(edx)); |
| JumpPatchSite patch_site(masm_); |
| patch_site.EmitJumpIfSmi(eax, &smi_case); |
| |
| __ bind(&stub_call); |
| __ mov(eax, ecx); |
| TypeRecordingBinaryOpStub stub(op, mode); |
| EmitCallIC(stub.GetCode(), &patch_site); |
| __ jmp(&done); |
| |
| // Smi case. |
| __ bind(&smi_case); |
| __ mov(eax, edx); // Copy left operand in case of a stub call. |
| |
| switch (op) { |
| case Token::SAR: |
| __ SmiUntag(eax); |
| __ SmiUntag(ecx); |
| __ sar_cl(eax); // No checks of result necessary |
| __ SmiTag(eax); |
| break; |
| case Token::SHL: { |
| Label result_ok; |
| __ SmiUntag(eax); |
| __ SmiUntag(ecx); |
| __ shl_cl(eax); |
| // Check that the *signed* result fits in a smi. |
| __ cmp(eax, 0xc0000000); |
| __ j(positive, &result_ok); |
| __ SmiTag(ecx); |
| __ jmp(&stub_call); |
| __ bind(&result_ok); |
| __ SmiTag(eax); |
| break; |
| } |
| case Token::SHR: { |
| Label result_ok; |
| __ SmiUntag(eax); |
| __ SmiUntag(ecx); |
| __ shr_cl(eax); |
| __ test(eax, Immediate(0xc0000000)); |
| __ j(zero, &result_ok); |
| __ SmiTag(ecx); |
| __ jmp(&stub_call); |
| __ bind(&result_ok); |
| __ SmiTag(eax); |
| break; |
| } |
| case Token::ADD: |
| __ add(eax, Operand(ecx)); |
| __ j(overflow, &stub_call); |
| break; |
| case Token::SUB: |
| __ sub(eax, Operand(ecx)); |
| __ j(overflow, &stub_call); |
| break; |
| case Token::MUL: { |
| __ SmiUntag(eax); |
| __ imul(eax, Operand(ecx)); |
| __ j(overflow, &stub_call); |
| __ test(eax, Operand(eax)); |
| __ j(not_zero, &done, taken); |
| __ mov(ebx, edx); |
| __ or_(ebx, Operand(ecx)); |
| __ j(negative, &stub_call); |
| break; |
| } |
| case Token::BIT_OR: |
| __ or_(eax, Operand(ecx)); |
| break; |
| case Token::BIT_AND: |
| __ and_(eax, Operand(ecx)); |
| break; |
| case Token::BIT_XOR: |
| __ xor_(eax, Operand(ecx)); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| |
| __ bind(&done); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitBinaryOp(Token::Value op, |
| OverwriteMode mode) { |
| __ pop(edx); |
| TypeRecordingBinaryOpStub stub(op, mode); |
| EmitCallIC(stub.GetCode(), NULL); // NULL signals no inlined smi code. |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitAssignment(Expression* expr, int bailout_ast_id) { |
| // Invalid left-hand sides are rewritten to have a 'throw |
| // ReferenceError' on the left-hand side. |
| if (!expr->IsValidLeftHandSide()) { |
| VisitForEffect(expr); |
| return; |
| } |
| |
| // Left-hand side can only be a property, a global or a (parameter or local) |
| // slot. Variables with rewrite to .arguments are treated as KEYED_PROPERTY. |
| enum LhsKind { VARIABLE, NAMED_PROPERTY, KEYED_PROPERTY }; |
| LhsKind assign_type = VARIABLE; |
| Property* prop = expr->AsProperty(); |
| if (prop != NULL) { |
| assign_type = (prop->key()->IsPropertyName()) |
| ? NAMED_PROPERTY |
| : KEYED_PROPERTY; |
| } |
| |
| switch (assign_type) { |
| case VARIABLE: { |
| Variable* var = expr->AsVariableProxy()->var(); |
| EffectContext context(this); |
| EmitVariableAssignment(var, Token::ASSIGN); |
| break; |
| } |
| case NAMED_PROPERTY: { |
| __ push(eax); // Preserve value. |
| VisitForAccumulatorValue(prop->obj()); |
| __ mov(edx, eax); |
| __ pop(eax); // Restore value. |
| __ mov(ecx, prop->key()->AsLiteral()->handle()); |
| Handle<Code> ic(Builtins::builtin( |
| is_strict() ? Builtins::StoreIC_Initialize_Strict |
| : Builtins::StoreIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| break; |
| } |
| case KEYED_PROPERTY: { |
| __ push(eax); // Preserve value. |
| if (prop->is_synthetic()) { |
| ASSERT(prop->obj()->AsVariableProxy() != NULL); |
| ASSERT(prop->key()->AsLiteral() != NULL); |
| { AccumulatorValueContext for_object(this); |
| EmitVariableLoad(prop->obj()->AsVariableProxy()->var()); |
| } |
| __ mov(edx, eax); |
| __ Set(ecx, Immediate(prop->key()->AsLiteral()->handle())); |
| } else { |
| VisitForStackValue(prop->obj()); |
| VisitForAccumulatorValue(prop->key()); |
| __ mov(ecx, eax); |
| __ pop(edx); |
| } |
| __ pop(eax); // Restore value. |
| Handle<Code> ic(Builtins::builtin( |
| is_strict() ? Builtins::KeyedStoreIC_Initialize_Strict |
| : Builtins::KeyedStoreIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| break; |
| } |
| } |
| PrepareForBailoutForId(bailout_ast_id, TOS_REG); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitVariableAssignment(Variable* var, |
| Token::Value op) { |
| // Left-hand sides that rewrite to explicit property accesses do not reach |
| // here. |
| ASSERT(var != NULL); |
| ASSERT(var->is_global() || var->AsSlot() != NULL); |
| |
| if (var->is_global()) { |
| ASSERT(!var->is_this()); |
| // Assignment to a global variable. Use inline caching for the |
| // assignment. Right-hand-side value is passed in eax, variable name in |
| // ecx, and the global object on the stack. |
| __ mov(ecx, var->name()); |
| __ mov(edx, GlobalObjectOperand()); |
| Handle<Code> ic(Builtins::builtin( |
| is_strict() ? Builtins::StoreIC_Initialize_Strict |
| : Builtins::StoreIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET_CONTEXT); |
| |
| } else if (op == Token::INIT_CONST) { |
| // Like var declarations, const declarations are hoisted to function |
| // scope. However, unlike var initializers, const initializers are able |
| // to drill a hole to that function context, even from inside a 'with' |
| // context. We thus bypass the normal static scope lookup. |
| Slot* slot = var->AsSlot(); |
| Label skip; |
| switch (slot->type()) { |
| case Slot::PARAMETER: |
| // No const parameters. |
| UNREACHABLE(); |
| break; |
| case Slot::LOCAL: |
| __ mov(edx, Operand(ebp, SlotOffset(slot))); |
| __ cmp(edx, Factory::the_hole_value()); |
| __ j(not_equal, &skip); |
| __ mov(Operand(ebp, SlotOffset(slot)), eax); |
| break; |
| case Slot::CONTEXT: { |
| __ mov(ecx, ContextOperand(esi, Context::FCONTEXT_INDEX)); |
| __ mov(edx, ContextOperand(ecx, slot->index())); |
| __ cmp(edx, Factory::the_hole_value()); |
| __ j(not_equal, &skip); |
| __ mov(ContextOperand(ecx, slot->index()), eax); |
| int offset = Context::SlotOffset(slot->index()); |
| __ mov(edx, eax); // Preserve the stored value in eax. |
| __ RecordWrite(ecx, offset, edx, ebx); |
| break; |
| } |
| case Slot::LOOKUP: |
| __ push(eax); |
| __ push(esi); |
| __ push(Immediate(var->name())); |
| __ CallRuntime(Runtime::kInitializeConstContextSlot, 3); |
| break; |
| } |
| __ bind(&skip); |
| |
| } else if (var->mode() != Variable::CONST) { |
| // Perform the assignment for non-const variables. Const assignments |
| // are simply skipped. |
| Slot* slot = var->AsSlot(); |
| switch (slot->type()) { |
| case Slot::PARAMETER: |
| case Slot::LOCAL: |
| // Perform the assignment. |
| __ mov(Operand(ebp, SlotOffset(slot)), eax); |
| break; |
| |
| case Slot::CONTEXT: { |
| MemOperand target = EmitSlotSearch(slot, ecx); |
| // Perform the assignment and issue the write barrier. |
| __ mov(target, eax); |
| // The value of the assignment is in eax. RecordWrite clobbers its |
| // register arguments. |
| __ mov(edx, eax); |
| int offset = Context::SlotOffset(slot->index()); |
| __ RecordWrite(ecx, offset, edx, ebx); |
| break; |
| } |
| |
| case Slot::LOOKUP: |
| // Call the runtime for the assignment. |
| __ push(eax); // Value. |
| __ push(esi); // Context. |
| __ push(Immediate(var->name())); |
| __ push(Immediate(Smi::FromInt(strict_mode_flag()))); |
| __ CallRuntime(Runtime::kStoreContextSlot, 4); |
| break; |
| } |
| } |
| } |
| |
| |
| void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) { |
| // Assignment to a property, using a named store IC. |
| Property* prop = expr->target()->AsProperty(); |
| ASSERT(prop != NULL); |
| ASSERT(prop->key()->AsLiteral() != NULL); |
| |
| // If the assignment starts a block of assignments to the same object, |
| // change to slow case to avoid the quadratic behavior of repeatedly |
| // adding fast properties. |
| if (expr->starts_initialization_block()) { |
| __ push(result_register()); |
| __ push(Operand(esp, kPointerSize)); // Receiver is now under value. |
| __ CallRuntime(Runtime::kToSlowProperties, 1); |
| __ pop(result_register()); |
| } |
| |
| // Record source code position before IC call. |
| SetSourcePosition(expr->position()); |
| __ mov(ecx, prop->key()->AsLiteral()->handle()); |
| if (expr->ends_initialization_block()) { |
| __ mov(edx, Operand(esp, 0)); |
| } else { |
| __ pop(edx); |
| } |
| Handle<Code> ic(Builtins::builtin( |
| is_strict() ? Builtins::StoreIC_Initialize_Strict |
| : Builtins::StoreIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| |
| // If the assignment ends an initialization block, revert to fast case. |
| if (expr->ends_initialization_block()) { |
| __ push(eax); // Result of assignment, saved even if not needed. |
| __ push(Operand(esp, kPointerSize)); // Receiver is under value. |
| __ CallRuntime(Runtime::kToFastProperties, 1); |
| __ pop(eax); |
| __ Drop(1); |
| } |
| PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) { |
| // Assignment to a property, using a keyed store IC. |
| |
| // If the assignment starts a block of assignments to the same object, |
| // change to slow case to avoid the quadratic behavior of repeatedly |
| // adding fast properties. |
| if (expr->starts_initialization_block()) { |
| __ push(result_register()); |
| // Receiver is now under the key and value. |
| __ push(Operand(esp, 2 * kPointerSize)); |
| __ CallRuntime(Runtime::kToSlowProperties, 1); |
| __ pop(result_register()); |
| } |
| |
| __ pop(ecx); |
| if (expr->ends_initialization_block()) { |
| __ mov(edx, Operand(esp, 0)); // Leave receiver on the stack for later. |
| } else { |
| __ pop(edx); |
| } |
| // Record source code position before IC call. |
| SetSourcePosition(expr->position()); |
| Handle<Code> ic(Builtins::builtin( |
| is_strict() ? Builtins::KeyedStoreIC_Initialize_Strict |
| : Builtins::KeyedStoreIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| |
| // If the assignment ends an initialization block, revert to fast case. |
| if (expr->ends_initialization_block()) { |
| __ pop(edx); |
| __ push(eax); // Result of assignment, saved even if not needed. |
| __ push(edx); |
| __ CallRuntime(Runtime::kToFastProperties, 1); |
| __ pop(eax); |
| } |
| |
| PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::VisitProperty(Property* expr) { |
| Comment cmnt(masm_, "[ Property"); |
| Expression* key = expr->key(); |
| |
| if (key->IsPropertyName()) { |
| VisitForAccumulatorValue(expr->obj()); |
| EmitNamedPropertyLoad(expr); |
| context()->Plug(eax); |
| } else { |
| VisitForStackValue(expr->obj()); |
| VisitForAccumulatorValue(expr->key()); |
| __ pop(edx); |
| EmitKeyedPropertyLoad(expr); |
| context()->Plug(eax); |
| } |
| } |
| |
| |
| void FullCodeGenerator::EmitCallWithIC(Call* expr, |
| Handle<Object> name, |
| RelocInfo::Mode mode) { |
| // Code common for calls using the IC. |
| ZoneList<Expression*>* args = expr->arguments(); |
| int arg_count = args->length(); |
| { PreservePositionScope scope(masm()->positions_recorder()); |
| for (int i = 0; i < arg_count; i++) { |
| VisitForStackValue(args->at(i)); |
| } |
| __ Set(ecx, Immediate(name)); |
| } |
| // Record source position of the IC call. |
| SetSourcePosition(expr->position()); |
| InLoopFlag in_loop = (loop_depth() > 0) ? IN_LOOP : NOT_IN_LOOP; |
| Handle<Code> ic = StubCache::ComputeCallInitialize(arg_count, in_loop); |
| EmitCallIC(ic, mode); |
| RecordJSReturnSite(expr); |
| // Restore context register. |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitKeyedCallWithIC(Call* expr, |
| Expression* key, |
| RelocInfo::Mode mode) { |
| // Load the key. |
| VisitForAccumulatorValue(key); |
| |
| // Swap the name of the function and the receiver on the stack to follow |
| // the calling convention for call ICs. |
| __ pop(ecx); |
| __ push(eax); |
| __ push(ecx); |
| |
| // Load the arguments. |
| ZoneList<Expression*>* args = expr->arguments(); |
| int arg_count = args->length(); |
| { PreservePositionScope scope(masm()->positions_recorder()); |
| for (int i = 0; i < arg_count; i++) { |
| VisitForStackValue(args->at(i)); |
| } |
| } |
| // Record source position of the IC call. |
| SetSourcePosition(expr->position()); |
| InLoopFlag in_loop = (loop_depth() > 0) ? IN_LOOP : NOT_IN_LOOP; |
| Handle<Code> ic = StubCache::ComputeKeyedCallInitialize(arg_count, in_loop); |
| __ mov(ecx, Operand(esp, (arg_count + 1) * kPointerSize)); // Key. |
| EmitCallIC(ic, mode); |
| RecordJSReturnSite(expr); |
| // Restore context register. |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| context()->DropAndPlug(1, eax); // Drop the key still on the stack. |
| } |
| |
| |
| void FullCodeGenerator::EmitCallWithStub(Call* expr) { |
| // Code common for calls using the call stub. |
| ZoneList<Expression*>* args = expr->arguments(); |
| int arg_count = args->length(); |
| { PreservePositionScope scope(masm()->positions_recorder()); |
| for (int i = 0; i < arg_count; i++) { |
| VisitForStackValue(args->at(i)); |
| } |
| } |
| // Record source position for debugger. |
| SetSourcePosition(expr->position()); |
| InLoopFlag in_loop = (loop_depth() > 0) ? IN_LOOP : NOT_IN_LOOP; |
| CallFunctionStub stub(arg_count, in_loop, RECEIVER_MIGHT_BE_VALUE); |
| __ CallStub(&stub); |
| RecordJSReturnSite(expr); |
| // Restore context register. |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| context()->DropAndPlug(1, eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitResolvePossiblyDirectEval(ResolveEvalFlag flag, |
| int arg_count) { |
| // Push copy of the first argument or undefined if it doesn't exist. |
| if (arg_count > 0) { |
| __ push(Operand(esp, arg_count * kPointerSize)); |
| } else { |
| __ push(Immediate(Factory::undefined_value())); |
| } |
| |
| // Push the receiver of the enclosing function. |
| __ push(Operand(ebp, (2 + scope()->num_parameters()) * kPointerSize)); |
| |
| // Push the strict mode flag. |
| __ push(Immediate(Smi::FromInt(strict_mode_flag()))); |
| |
| __ CallRuntime(flag == SKIP_CONTEXT_LOOKUP |
| ? Runtime::kResolvePossiblyDirectEvalNoLookup |
| : Runtime::kResolvePossiblyDirectEval, 4); |
| } |
| |
| |
| void FullCodeGenerator::VisitCall(Call* expr) { |
| #ifdef DEBUG |
| // We want to verify that RecordJSReturnSite gets called on all paths |
| // through this function. Avoid early returns. |
| expr->return_is_recorded_ = false; |
| #endif |
| |
| Comment cmnt(masm_, "[ Call"); |
| Expression* fun = expr->expression(); |
| Variable* var = fun->AsVariableProxy()->AsVariable(); |
| |
| if (var != NULL && var->is_possibly_eval()) { |
| // In a call to eval, we first call %ResolvePossiblyDirectEval to |
| // resolve the function we need to call and the receiver of the |
| // call. Then we call the resolved function using the given |
| // arguments. |
| ZoneList<Expression*>* args = expr->arguments(); |
| int arg_count = args->length(); |
| { PreservePositionScope pos_scope(masm()->positions_recorder()); |
| VisitForStackValue(fun); |
| // Reserved receiver slot. |
| __ push(Immediate(Factory::undefined_value())); |
| |
| // Push the arguments. |
| for (int i = 0; i < arg_count; i++) { |
| VisitForStackValue(args->at(i)); |
| } |
| |
| // If we know that eval can only be shadowed by eval-introduced |
| // variables we attempt to load the global eval function directly |
| // in generated code. If we succeed, there is no need to perform a |
| // context lookup in the runtime system. |
| Label done; |
| if (var->AsSlot() != NULL && var->mode() == Variable::DYNAMIC_GLOBAL) { |
| Label slow; |
| EmitLoadGlobalSlotCheckExtensions(var->AsSlot(), |
| NOT_INSIDE_TYPEOF, |
| &slow); |
| // Push the function and resolve eval. |
| __ push(eax); |
| EmitResolvePossiblyDirectEval(SKIP_CONTEXT_LOOKUP, arg_count); |
| __ jmp(&done); |
| __ bind(&slow); |
| } |
| |
| // Push copy of the function (found below the arguments) and |
| // resolve eval. |
| __ push(Operand(esp, (arg_count + 1) * kPointerSize)); |
| EmitResolvePossiblyDirectEval(PERFORM_CONTEXT_LOOKUP, arg_count); |
| if (done.is_linked()) { |
| __ bind(&done); |
| } |
| |
| // The runtime call returns a pair of values in eax (function) and |
| // edx (receiver). Touch up the stack with the right values. |
| __ mov(Operand(esp, (arg_count + 0) * kPointerSize), edx); |
| __ mov(Operand(esp, (arg_count + 1) * kPointerSize), eax); |
| } |
| // Record source position for debugger. |
| SetSourcePosition(expr->position()); |
| InLoopFlag in_loop = (loop_depth() > 0) ? IN_LOOP : NOT_IN_LOOP; |
| CallFunctionStub stub(arg_count, in_loop, RECEIVER_MIGHT_BE_VALUE); |
| __ CallStub(&stub); |
| RecordJSReturnSite(expr); |
| // Restore context register. |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| context()->DropAndPlug(1, eax); |
| } else if (var != NULL && !var->is_this() && var->is_global()) { |
| // Push global object as receiver for the call IC. |
| __ push(GlobalObjectOperand()); |
| EmitCallWithIC(expr, var->name(), RelocInfo::CODE_TARGET_CONTEXT); |
| } else if (var != NULL && var->AsSlot() != NULL && |
| var->AsSlot()->type() == Slot::LOOKUP) { |
| // Call to a lookup slot (dynamically introduced variable). |
| Label slow, done; |
| |
| { PreservePositionScope scope(masm()->positions_recorder()); |
| // Generate code for loading from variables potentially shadowed |
| // by eval-introduced variables. |
| EmitDynamicLoadFromSlotFastCase(var->AsSlot(), |
| NOT_INSIDE_TYPEOF, |
| &slow, |
| &done); |
| } |
| |
| __ bind(&slow); |
| // Call the runtime to find the function to call (returned in eax) |
| // and the object holding it (returned in edx). |
| __ push(context_register()); |
| __ push(Immediate(var->name())); |
| __ CallRuntime(Runtime::kLoadContextSlot, 2); |
| __ push(eax); // Function. |
| __ push(edx); // Receiver. |
| |
| // If fast case code has been generated, emit code to push the |
| // function and receiver and have the slow path jump around this |
| // code. |
| if (done.is_linked()) { |
| Label call; |
| __ jmp(&call); |
| __ bind(&done); |
| // Push function. |
| __ push(eax); |
| // Push global receiver. |
| __ mov(ebx, GlobalObjectOperand()); |
| __ push(FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset)); |
| __ bind(&call); |
| } |
| |
| EmitCallWithStub(expr); |
| } else if (fun->AsProperty() != NULL) { |
| // Call to an object property. |
| Property* prop = fun->AsProperty(); |
| Literal* key = prop->key()->AsLiteral(); |
| if (key != NULL && key->handle()->IsSymbol()) { |
| // Call to a named property, use call IC. |
| { PreservePositionScope scope(masm()->positions_recorder()); |
| VisitForStackValue(prop->obj()); |
| } |
| EmitCallWithIC(expr, key->handle(), RelocInfo::CODE_TARGET); |
| } else { |
| // Call to a keyed property. |
| // For a synthetic property use keyed load IC followed by function call, |
| // for a regular property use keyed EmitCallIC. |
| if (prop->is_synthetic()) { |
| // Do not visit the object and key subexpressions (they are shared |
| // by all occurrences of the same rewritten parameter). |
| ASSERT(prop->obj()->AsVariableProxy() != NULL); |
| ASSERT(prop->obj()->AsVariableProxy()->var()->AsSlot() != NULL); |
| Slot* slot = prop->obj()->AsVariableProxy()->var()->AsSlot(); |
| MemOperand operand = EmitSlotSearch(slot, edx); |
| __ mov(edx, operand); |
| |
| ASSERT(prop->key()->AsLiteral() != NULL); |
| ASSERT(prop->key()->AsLiteral()->handle()->IsSmi()); |
| __ mov(eax, prop->key()->AsLiteral()->handle()); |
| |
| // Record source code position for IC call. |
| SetSourcePosition(prop->position()); |
| |
| Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| // Push result (function). |
| __ push(eax); |
| // Push Global receiver. |
| __ mov(ecx, GlobalObjectOperand()); |
| __ push(FieldOperand(ecx, GlobalObject::kGlobalReceiverOffset)); |
| EmitCallWithStub(expr); |
| } else { |
| { PreservePositionScope scope(masm()->positions_recorder()); |
| VisitForStackValue(prop->obj()); |
| } |
| EmitKeyedCallWithIC(expr, prop->key(), RelocInfo::CODE_TARGET); |
| } |
| } |
| } else { |
| // Call to some other expression. If the expression is an anonymous |
| // function literal not called in a loop, mark it as one that should |
| // also use the full code generator. |
| FunctionLiteral* lit = fun->AsFunctionLiteral(); |
| if (lit != NULL && |
| lit->name()->Equals(Heap::empty_string()) && |
| loop_depth() == 0) { |
| lit->set_try_full_codegen(true); |
| } |
| { PreservePositionScope scope(masm()->positions_recorder()); |
| VisitForStackValue(fun); |
| } |
| // Load global receiver object. |
| __ mov(ebx, GlobalObjectOperand()); |
| __ push(FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset)); |
| // Emit function call. |
| EmitCallWithStub(expr); |
| } |
| |
| #ifdef DEBUG |
| // RecordJSReturnSite should have been called. |
| ASSERT(expr->return_is_recorded_); |
| #endif |
| } |
| |
| |
| void FullCodeGenerator::VisitCallNew(CallNew* expr) { |
| Comment cmnt(masm_, "[ CallNew"); |
| // According to ECMA-262, section 11.2.2, page 44, the function |
| // expression in new calls must be evaluated before the |
| // arguments. |
| |
| // Push constructor on the stack. If it's not a function it's used as |
| // receiver for CALL_NON_FUNCTION, otherwise the value on the stack is |
| // ignored. |
| VisitForStackValue(expr->expression()); |
| |
| // Push the arguments ("left-to-right") on the stack. |
| ZoneList<Expression*>* args = expr->arguments(); |
| int arg_count = args->length(); |
| for (int i = 0; i < arg_count; i++) { |
| VisitForStackValue(args->at(i)); |
| } |
| |
| // Call the construct call builtin that handles allocation and |
| // constructor invocation. |
| SetSourcePosition(expr->position()); |
| |
| // Load function and argument count into edi and eax. |
| __ Set(eax, Immediate(arg_count)); |
| __ mov(edi, Operand(esp, arg_count * kPointerSize)); |
| |
| Handle<Code> construct_builtin(Builtins::builtin(Builtins::JSConstructCall)); |
| __ call(construct_builtin, RelocInfo::CONSTRUCT_CALL); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitIsSmi(ZoneList<Expression*>* args) { |
| ASSERT(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(TOS_REG, true, if_true, if_false); |
| __ test(eax, Immediate(kSmiTagMask)); |
| Split(zero, if_true, if_false, fall_through); |
| |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::EmitIsNonNegativeSmi(ZoneList<Expression*>* args) { |
| ASSERT(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(TOS_REG, true, if_true, if_false); |
| __ test(eax, Immediate(kSmiTagMask | 0x80000000)); |
| Split(zero, if_true, if_false, fall_through); |
| |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::EmitIsObject(ZoneList<Expression*>* args) { |
| ASSERT(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); |
| |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(zero, if_false); |
| __ cmp(eax, Factory::null_value()); |
| __ j(equal, if_true); |
| __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| // Undetectable objects behave like undefined when tested with typeof. |
| __ movzx_b(ecx, FieldOperand(ebx, Map::kBitFieldOffset)); |
| __ test(ecx, Immediate(1 << Map::kIsUndetectable)); |
| __ j(not_zero, if_false); |
| __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceTypeOffset)); |
| __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
| __ j(below, if_false); |
| __ cmp(ecx, LAST_JS_OBJECT_TYPE); |
| PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false); |
| Split(below_equal, if_true, if_false, fall_through); |
| |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::EmitIsSpecObject(ZoneList<Expression*>* args) { |
| ASSERT(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); |
| |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(equal, if_false); |
| __ CmpObjectType(eax, FIRST_JS_OBJECT_TYPE, ebx); |
| PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false); |
| Split(above_equal, if_true, if_false, fall_through); |
| |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::EmitIsUndetectableObject(ZoneList<Expression*>* args) { |
| ASSERT(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); |
| |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(zero, if_false); |
| __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| __ movzx_b(ebx, FieldOperand(ebx, Map::kBitFieldOffset)); |
| __ test(ebx, Immediate(1 << Map::kIsUndetectable)); |
| PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false); |
| Split(not_zero, if_true, if_false, fall_through); |
| |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf( |
| ZoneList<Expression*>* args) { |
| ASSERT(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); |
| |
| // TODO(3110205): Implement this. |
| // Currently unimplemented. Emit false, a safe choice. |
| PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false); |
| __ jmp(if_false); |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::EmitIsFunction(ZoneList<Expression*>* args) { |
| ASSERT(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); |
| |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(zero, if_false); |
| __ CmpObjectType(eax, JS_FUNCTION_TYPE, ebx); |
| PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false); |
| Split(equal, if_true, if_false, fall_through); |
| |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::EmitIsArray(ZoneList<Expression*>* args) { |
| ASSERT(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); |
| |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(equal, if_false); |
| __ CmpObjectType(eax, JS_ARRAY_TYPE, ebx); |
| PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false); |
| Split(equal, if_true, if_false, fall_through); |
| |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::EmitIsRegExp(ZoneList<Expression*>* args) { |
| ASSERT(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); |
| |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(equal, if_false); |
| __ CmpObjectType(eax, JS_REGEXP_TYPE, ebx); |
| PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false); |
| Split(equal, if_true, if_false, fall_through); |
| |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| |
| void FullCodeGenerator::EmitIsConstructCall(ZoneList<Expression*>* args) { |
| ASSERT(args->length() == 0); |
| |
| Label materialize_true, materialize_false; |
| Label* if_true = NULL; |
| Label* if_false = NULL; |
| Label* fall_through = NULL; |
| context()->PrepareTest(&materialize_true, &materialize_false, |
| &if_true, &if_false, &fall_through); |
| |
| // Get the frame pointer for the calling frame. |
| __ mov(eax, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| |
| // Skip the arguments adaptor frame if it exists. |
| Label check_frame_marker; |
| __ cmp(Operand(eax, StandardFrameConstants::kContextOffset), |
| Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| __ j(not_equal, &check_frame_marker); |
| __ mov(eax, Operand(eax, StandardFrameConstants::kCallerFPOffset)); |
| |
| // Check the marker in the calling frame. |
| __ bind(&check_frame_marker); |
| __ cmp(Operand(eax, StandardFrameConstants::kMarkerOffset), |
| Immediate(Smi::FromInt(StackFrame::CONSTRUCT))); |
| PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false); |
| Split(equal, if_true, if_false, fall_through); |
| |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::EmitObjectEquals(ZoneList<Expression*>* args) { |
| ASSERT(args->length() == 2); |
| |
| // Load the two objects into registers and perform the comparison. |
| VisitForStackValue(args->at(0)); |
| VisitForAccumulatorValue(args->at(1)); |
| |
| Label materialize_true, materialize_false; |
| Label* if_true = NULL; |
| Label* if_false = NULL; |
| Label* fall_through = NULL; |
| context()->PrepareTest(&materialize_true, &materialize_false, |
| &if_true, &if_false, &fall_through); |
| |
| __ pop(ebx); |
| __ cmp(eax, Operand(ebx)); |
| PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false); |
| Split(equal, if_true, if_false, fall_through); |
| |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::EmitArguments(ZoneList<Expression*>* args) { |
| ASSERT(args->length() == 1); |
| |
| // ArgumentsAccessStub expects the key in edx and the formal |
| // parameter count in eax. |
| VisitForAccumulatorValue(args->at(0)); |
| __ mov(edx, eax); |
| __ mov(eax, Immediate(Smi::FromInt(scope()->num_parameters()))); |
| ArgumentsAccessStub stub(ArgumentsAccessStub::READ_ELEMENT); |
| __ CallStub(&stub); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitArgumentsLength(ZoneList<Expression*>* args) { |
| ASSERT(args->length() == 0); |
| |
| Label exit; |
| // Get the number of formal parameters. |
| __ Set(eax, Immediate(Smi::FromInt(scope()->num_parameters()))); |
| |
| // Check if the calling frame is an arguments adaptor frame. |
| __ mov(ebx, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| __ cmp(Operand(ebx, StandardFrameConstants::kContextOffset), |
| Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| __ j(not_equal, &exit); |
| |
| // Arguments adaptor case: Read the arguments length from the |
| // adaptor frame. |
| __ mov(eax, Operand(ebx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| |
| __ bind(&exit); |
| if (FLAG_debug_code) __ AbortIfNotSmi(eax); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitClassOf(ZoneList<Expression*>* args) { |
| ASSERT(args->length() == 1); |
| Label done, null, function, non_function_constructor; |
| |
| VisitForAccumulatorValue(args->at(0)); |
| |
| // If the object is a smi, we return null. |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(zero, &null); |
| |
| // Check that the object is a JS object but take special care of JS |
| // functions to make sure they have 'Function' as their class. |
| __ CmpObjectType(eax, FIRST_JS_OBJECT_TYPE, eax); // Map is now in eax. |
| __ j(below, &null); |
| |
| // As long as JS_FUNCTION_TYPE is the last instance type and it is |
| // right after LAST_JS_OBJECT_TYPE, we can avoid checking for |
| // LAST_JS_OBJECT_TYPE. |
| ASSERT(LAST_TYPE == JS_FUNCTION_TYPE); |
| ASSERT(JS_FUNCTION_TYPE == LAST_JS_OBJECT_TYPE + 1); |
| __ CmpInstanceType(eax, JS_FUNCTION_TYPE); |
| __ j(equal, &function); |
| |
| // Check if the constructor in the map is a function. |
| __ mov(eax, FieldOperand(eax, Map::kConstructorOffset)); |
| __ CmpObjectType(eax, JS_FUNCTION_TYPE, ebx); |
| __ j(not_equal, &non_function_constructor); |
| |
| // eax now contains the constructor function. Grab the |
| // instance class name from there. |
| __ mov(eax, FieldOperand(eax, JSFunction::kSharedFunctionInfoOffset)); |
| __ mov(eax, FieldOperand(eax, SharedFunctionInfo::kInstanceClassNameOffset)); |
| __ jmp(&done); |
| |
| // Functions have class 'Function'. |
| __ bind(&function); |
| __ mov(eax, Factory::function_class_symbol()); |
| __ jmp(&done); |
| |
| // Objects with a non-function constructor have class 'Object'. |
| __ bind(&non_function_constructor); |
| __ mov(eax, Factory::Object_symbol()); |
| __ jmp(&done); |
| |
| // Non-JS objects have class null. |
| __ bind(&null); |
| __ mov(eax, Factory::null_value()); |
| |
| // All done. |
| __ bind(&done); |
| |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitLog(ZoneList<Expression*>* args) { |
| // Conditionally generate a log call. |
| // Args: |
| // 0 (literal string): The type of logging (corresponds to the flags). |
| // This is used to determine whether or not to generate the log call. |
| // 1 (string): Format string. Access the string at argument index 2 |
| // with '%2s' (see Logger::LogRuntime for all the formats). |
| // 2 (array): Arguments to the format string. |
| ASSERT_EQ(args->length(), 3); |
| #ifdef ENABLE_LOGGING_AND_PROFILING |
| if (CodeGenerator::ShouldGenerateLog(args->at(0))) { |
| VisitForStackValue(args->at(1)); |
| VisitForStackValue(args->at(2)); |
| __ CallRuntime(Runtime::kLog, 2); |
| } |
| #endif |
| // Finally, we're expected to leave a value on the top of the stack. |
| __ mov(eax, Factory::undefined_value()); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitRandomHeapNumber(ZoneList<Expression*>* args) { |
| ASSERT(args->length() == 0); |
| |
| Label slow_allocate_heapnumber; |
| Label heapnumber_allocated; |
| |
| __ AllocateHeapNumber(edi, ebx, ecx, &slow_allocate_heapnumber); |
| __ jmp(&heapnumber_allocated); |
| |
| __ bind(&slow_allocate_heapnumber); |
| // Allocate a heap number. |
| __ CallRuntime(Runtime::kNumberAlloc, 0); |
| __ mov(edi, eax); |
| |
| __ bind(&heapnumber_allocated); |
| |
| __ PrepareCallCFunction(0, ebx); |
| __ CallCFunction(ExternalReference::random_uint32_function(), 0); |
| |
| // Convert 32 random bits in eax to 0.(32 random bits) in a double |
| // by computing: |
| // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)). |
| // This is implemented on both SSE2 and FPU. |
| if (CpuFeatures::IsSupported(SSE2)) { |
| CpuFeatures::Scope fscope(SSE2); |
| __ mov(ebx, Immediate(0x49800000)); // 1.0 x 2^20 as single. |
| __ movd(xmm1, Operand(ebx)); |
| __ movd(xmm0, Operand(eax)); |
| __ cvtss2sd(xmm1, xmm1); |
| __ pxor(xmm0, xmm1); |
| __ subsd(xmm0, xmm1); |
| __ movdbl(FieldOperand(edi, HeapNumber::kValueOffset), xmm0); |
| } else { |
| // 0x4130000000000000 is 1.0 x 2^20 as a double. |
| __ mov(FieldOperand(edi, HeapNumber::kExponentOffset), |
| Immediate(0x41300000)); |
| __ mov(FieldOperand(edi, HeapNumber::kMantissaOffset), eax); |
| __ fld_d(FieldOperand(edi, HeapNumber::kValueOffset)); |
| __ mov(FieldOperand(edi, HeapNumber::kMantissaOffset), Immediate(0)); |
| __ fld_d(FieldOperand(edi, HeapNumber::kValueOffset)); |
| __ fsubp(1); |
| __ fstp_d(FieldOperand(edi, HeapNumber::kValueOffset)); |
| } |
| __ mov(eax, edi); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitSubString(ZoneList<Expression*>* args) { |
| // Load the arguments on the stack and call the stub. |
| SubStringStub stub; |
| ASSERT(args->length() == 3); |
| VisitForStackValue(args->at(0)); |
| VisitForStackValue(args->at(1)); |
| VisitForStackValue(args->at(2)); |
| __ CallStub(&stub); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitRegExpExec(ZoneList<Expression*>* args) { |
| // Load the arguments on the stack and call the stub. |
| RegExpExecStub stub; |
| ASSERT(args->length() == 4); |
| VisitForStackValue(args->at(0)); |
| VisitForStackValue(args->at(1)); |
| VisitForStackValue(args->at(2)); |
| VisitForStackValue(args->at(3)); |
| __ CallStub(&stub); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitValueOf(ZoneList<Expression*>* args) { |
| ASSERT(args->length() == 1); |
| |
| VisitForAccumulatorValue(args->at(0)); // Load the object. |
| |
| NearLabel done; |
| // If the object is a smi return the object. |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(zero, &done); |
| // If the object is not a value type, return the object. |
| __ CmpObjectType(eax, JS_VALUE_TYPE, ebx); |
| __ j(not_equal, &done); |
| __ mov(eax, FieldOperand(eax, JSValue::kValueOffset)); |
| |
| __ bind(&done); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitMathPow(ZoneList<Expression*>* args) { |
| // Load the arguments on the stack and call the runtime function. |
| ASSERT(args->length() == 2); |
| VisitForStackValue(args->at(0)); |
| VisitForStackValue(args->at(1)); |
| |
| MathPowStub stub; |
| __ CallStub(&stub); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitSetValueOf(ZoneList<Expression*>* args) { |
| ASSERT(args->length() == 2); |
| |
| VisitForStackValue(args->at(0)); // Load the object. |
| VisitForAccumulatorValue(args->at(1)); // Load the value. |
| __ pop(ebx); // eax = value. ebx = object. |
| |
| NearLabel done; |
| // If the object is a smi, return the value. |
| __ test(ebx, Immediate(kSmiTagMask)); |
| __ j(zero, &done); |
| |
| // If the object is not a value type, return the value. |
| __ CmpObjectType(ebx, JS_VALUE_TYPE, ecx); |
| __ j(not_equal, &done); |
| |
| // Store the value. |
| __ mov(FieldOperand(ebx, JSValue::kValueOffset), eax); |
| // Update the write barrier. Save the value as it will be |
| // overwritten by the write barrier code and is needed afterward. |
| __ mov(edx, eax); |
| __ RecordWrite(ebx, JSValue::kValueOffset, edx, ecx); |
| |
| __ bind(&done); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitNumberToString(ZoneList<Expression*>* args) { |
| ASSERT_EQ(args->length(), 1); |
| |
| // Load the argument on the stack and call the stub. |
| VisitForStackValue(args->at(0)); |
| |
| NumberToStringStub stub; |
| __ CallStub(&stub); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitStringCharFromCode(ZoneList<Expression*>* args) { |
| ASSERT(args->length() == 1); |
| |
| VisitForAccumulatorValue(args->at(0)); |
| |
| Label done; |
| StringCharFromCodeGenerator generator(eax, ebx); |
| generator.GenerateFast(masm_); |
| __ jmp(&done); |
| |
| NopRuntimeCallHelper call_helper; |
| generator.GenerateSlow(masm_, call_helper); |
| |
| __ bind(&done); |
| context()->Plug(ebx); |
| } |
| |
| |
| void FullCodeGenerator::EmitStringCharCodeAt(ZoneList<Expression*>* args) { |
| ASSERT(args->length() == 2); |
| |
| VisitForStackValue(args->at(0)); |
| VisitForAccumulatorValue(args->at(1)); |
| |
| Register object = ebx; |
| Register index = eax; |
| Register scratch = ecx; |
| Register result = edx; |
| |
| __ pop(object); |
| |
| Label need_conversion; |
| Label index_out_of_range; |
| Label done; |
| StringCharCodeAtGenerator generator(object, |
| index, |
| scratch, |
| result, |
| &need_conversion, |
| &need_conversion, |
| &index_out_of_range, |
| STRING_INDEX_IS_NUMBER); |
| generator.GenerateFast(masm_); |
| __ jmp(&done); |
| |
| __ bind(&index_out_of_range); |
| // When the index is out of range, the spec requires us to return |
| // NaN. |
| __ Set(result, Immediate(Factory::nan_value())); |
| __ jmp(&done); |
| |
| __ bind(&need_conversion); |
| // Move the undefined value into the result register, which will |
| // trigger conversion. |
| __ Set(result, Immediate(Factory::undefined_value())); |
| __ jmp(&done); |
| |
| NopRuntimeCallHelper call_helper; |
| generator.GenerateSlow(masm_, call_helper); |
| |
| __ bind(&done); |
| context()->Plug(result); |
| } |
| |
| |
| void FullCodeGenerator::EmitStringCharAt(ZoneList<Expression*>* args) { |
| ASSERT(args->length() == 2); |
| |
| VisitForStackValue(args->at(0)); |
| VisitForAccumulatorValue(args->at(1)); |
| |
| Register object = ebx; |
| Register index = eax; |
| Register scratch1 = ecx; |
| Register scratch2 = edx; |
| Register result = eax; |
| |
| __ pop(object); |
| |
| Label need_conversion; |
| Label index_out_of_range; |
| Label done; |
| StringCharAtGenerator generator(object, |
| index, |
| scratch1, |
| scratch2, |
| result, |
| &need_conversion, |
| &need_conversion, |
| &index_out_of_range, |
| STRING_INDEX_IS_NUMBER); |
| generator.GenerateFast(masm_); |
| __ jmp(&done); |
| |
| __ bind(&index_out_of_range); |
| // When the index is out of range, the spec requires us to return |
| // the empty string. |
| __ Set(result, Immediate(Factory::empty_string())); |
| __ jmp(&done); |
| |
| __ bind(&need_conversion); |
| // Move smi zero into the result register, which will trigger |
| // conversion. |
| __ Set(result, Immediate(Smi::FromInt(0))); |
| __ jmp(&done); |
| |
| NopRuntimeCallHelper call_helper; |
| generator.GenerateSlow(masm_, call_helper); |
| |
| __ bind(&done); |
| context()->Plug(result); |
| } |
| |
| |
| void FullCodeGenerator::EmitStringAdd(ZoneList<Expression*>* args) { |
| ASSERT_EQ(2, args->length()); |
| |
| VisitForStackValue(args->at(0)); |
| VisitForStackValue(args->at(1)); |
| |
| StringAddStub stub(NO_STRING_ADD_FLAGS); |
| __ CallStub(&stub); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitStringCompare(ZoneList<Expression*>* args) { |
| ASSERT_EQ(2, args->length()); |
| |
| VisitForStackValue(args->at(0)); |
| VisitForStackValue(args->at(1)); |
| |
| StringCompareStub stub; |
| __ CallStub(&stub); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitMathSin(ZoneList<Expression*>* args) { |
| // Load the argument on the stack and call the stub. |
| TranscendentalCacheStub stub(TranscendentalCache::SIN, |
| TranscendentalCacheStub::TAGGED); |
| ASSERT(args->length() == 1); |
| VisitForStackValue(args->at(0)); |
| __ CallStub(&stub); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitMathCos(ZoneList<Expression*>* args) { |
| // Load the argument on the stack and call the stub. |
| TranscendentalCacheStub stub(TranscendentalCache::COS, |
| TranscendentalCacheStub::TAGGED); |
| ASSERT(args->length() == 1); |
| VisitForStackValue(args->at(0)); |
| __ CallStub(&stub); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitMathLog(ZoneList<Expression*>* args) { |
| // Load the argument on the stack and call the stub. |
| TranscendentalCacheStub stub(TranscendentalCache::LOG, |
| TranscendentalCacheStub::TAGGED); |
| ASSERT(args->length() == 1); |
| VisitForStackValue(args->at(0)); |
| __ CallStub(&stub); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitMathSqrt(ZoneList<Expression*>* args) { |
| // Load the argument on the stack and call the runtime function. |
| ASSERT(args->length() == 1); |
| VisitForStackValue(args->at(0)); |
| __ CallRuntime(Runtime::kMath_sqrt, 1); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitCallFunction(ZoneList<Expression*>* args) { |
| ASSERT(args->length() >= 2); |
| |
| int arg_count = args->length() - 2; // For receiver and function. |
| VisitForStackValue(args->at(0)); // Receiver. |
| for (int i = 0; i < arg_count; i++) { |
| VisitForStackValue(args->at(i + 1)); |
| } |
| VisitForAccumulatorValue(args->at(arg_count + 1)); // Function. |
| |
| // InvokeFunction requires function in edi. Move it in there. |
| if (!result_register().is(edi)) __ mov(edi, result_register()); |
| ParameterCount count(arg_count); |
| __ InvokeFunction(edi, count, CALL_FUNCTION); |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitRegExpConstructResult(ZoneList<Expression*>* args) { |
| // Load the arguments on the stack and call the stub. |
| RegExpConstructResultStub stub; |
| ASSERT(args->length() == 3); |
| VisitForStackValue(args->at(0)); |
| VisitForStackValue(args->at(1)); |
| VisitForStackValue(args->at(2)); |
| __ CallStub(&stub); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitSwapElements(ZoneList<Expression*>* args) { |
| ASSERT(args->length() == 3); |
| VisitForStackValue(args->at(0)); |
| VisitForStackValue(args->at(1)); |
| VisitForStackValue(args->at(2)); |
| Label done; |
| Label slow_case; |
| Register object = eax; |
| Register index_1 = ebx; |
| Register index_2 = ecx; |
| Register elements = edi; |
| Register temp = edx; |
| __ mov(object, Operand(esp, 2 * kPointerSize)); |
| // Fetch the map and check if array is in fast case. |
| // Check that object doesn't require security checks and |
| // has no indexed interceptor. |
| __ CmpObjectType(object, FIRST_JS_OBJECT_TYPE, temp); |
| __ j(below, &slow_case); |
| __ test_b(FieldOperand(temp, Map::kBitFieldOffset), |
| KeyedLoadIC::kSlowCaseBitFieldMask); |
| __ j(not_zero, &slow_case); |
| |
| // Check the object's elements are in fast case and writable. |
| __ mov(elements, FieldOperand(object, JSObject::kElementsOffset)); |
| __ cmp(FieldOperand(elements, HeapObject::kMapOffset), |
| Immediate(Factory::fixed_array_map())); |
| __ j(not_equal, &slow_case); |
| |
| // Check that both indices are smis. |
| __ mov(index_1, Operand(esp, 1 * kPointerSize)); |
| __ mov(index_2, Operand(esp, 0)); |
| __ mov(temp, index_1); |
| __ or_(temp, Operand(index_2)); |
| __ test(temp, Immediate(kSmiTagMask)); |
| __ j(not_zero, &slow_case); |
| |
| // Check that both indices are valid. |
| __ mov(temp, FieldOperand(object, JSArray::kLengthOffset)); |
| __ cmp(temp, Operand(index_1)); |
| __ j(below_equal, &slow_case); |
| __ cmp(temp, Operand(index_2)); |
| __ j(below_equal, &slow_case); |
| |
| // Bring addresses into index1 and index2. |
| __ lea(index_1, CodeGenerator::FixedArrayElementOperand(elements, index_1)); |
| __ lea(index_2, CodeGenerator::FixedArrayElementOperand(elements, index_2)); |
| |
| // Swap elements. Use object and temp as scratch registers. |
| __ mov(object, Operand(index_1, 0)); |
| __ mov(temp, Operand(index_2, 0)); |
| __ mov(Operand(index_2, 0), object); |
| __ mov(Operand(index_1, 0), temp); |
| |
| Label new_space; |
| __ InNewSpace(elements, temp, equal, &new_space); |
| |
| __ mov(object, elements); |
| __ RecordWriteHelper(object, index_1, temp); |
| __ RecordWriteHelper(elements, index_2, temp); |
| |
| __ bind(&new_space); |
| // We are done. Drop elements from the stack, and return undefined. |
| __ add(Operand(esp), Immediate(3 * kPointerSize)); |
| __ mov(eax, Factory::undefined_value()); |
| __ jmp(&done); |
| |
| __ bind(&slow_case); |
| __ CallRuntime(Runtime::kSwapElements, 3); |
| |
| __ bind(&done); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitGetFromCache(ZoneList<Expression*>* args) { |
| ASSERT_EQ(2, args->length()); |
| |
| ASSERT_NE(NULL, args->at(0)->AsLiteral()); |
| int cache_id = Smi::cast(*(args->at(0)->AsLiteral()->handle()))->value(); |
| |
| Handle<FixedArray> jsfunction_result_caches( |
| Top::global_context()->jsfunction_result_caches()); |
| if (jsfunction_result_caches->length() <= cache_id) { |
| __ Abort("Attempt to use undefined cache."); |
| __ mov(eax, Factory::undefined_value()); |
| context()->Plug(eax); |
| return; |
| } |
| |
| VisitForAccumulatorValue(args->at(1)); |
| |
| Register key = eax; |
| Register cache = ebx; |
| Register tmp = ecx; |
| __ mov(cache, ContextOperand(esi, Context::GLOBAL_INDEX)); |
| __ mov(cache, |
| FieldOperand(cache, GlobalObject::kGlobalContextOffset)); |
| __ mov(cache, ContextOperand(cache, Context::JSFUNCTION_RESULT_CACHES_INDEX)); |
| __ mov(cache, |
| FieldOperand(cache, FixedArray::OffsetOfElementAt(cache_id))); |
| |
| Label done, not_found; |
| // tmp now holds finger offset as a smi. |
| ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
| __ mov(tmp, FieldOperand(cache, JSFunctionResultCache::kFingerOffset)); |
| __ cmp(key, CodeGenerator::FixedArrayElementOperand(cache, tmp)); |
| __ j(not_equal, ¬_found); |
| |
| __ mov(eax, CodeGenerator::FixedArrayElementOperand(cache, tmp, 1)); |
| __ jmp(&done); |
| |
| __ bind(¬_found); |
| // Call runtime to perform the lookup. |
| __ push(cache); |
| __ push(key); |
| __ CallRuntime(Runtime::kGetFromCache, 2); |
| |
| __ bind(&done); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitIsRegExpEquivalent(ZoneList<Expression*>* args) { |
| ASSERT_EQ(2, args->length()); |
| |
| Register right = eax; |
| Register left = ebx; |
| Register tmp = ecx; |
| |
| VisitForStackValue(args->at(0)); |
| VisitForAccumulatorValue(args->at(1)); |
| __ pop(left); |
| |
| Label done, fail, ok; |
| __ cmp(left, Operand(right)); |
| __ j(equal, &ok); |
| // Fail if either is a non-HeapObject. |
| __ mov(tmp, left); |
| __ and_(Operand(tmp), right); |
| __ test(Operand(tmp), Immediate(kSmiTagMask)); |
| __ j(zero, &fail); |
| __ CmpObjectType(left, JS_REGEXP_TYPE, tmp); |
| __ j(not_equal, &fail); |
| __ cmp(tmp, FieldOperand(right, HeapObject::kMapOffset)); |
| __ j(not_equal, &fail); |
| __ mov(tmp, FieldOperand(left, JSRegExp::kDataOffset)); |
| __ cmp(tmp, FieldOperand(right, JSRegExp::kDataOffset)); |
| __ j(equal, &ok); |
| __ bind(&fail); |
| __ mov(eax, Immediate(Factory::false_value())); |
| __ jmp(&done); |
| __ bind(&ok); |
| __ mov(eax, Immediate(Factory::true_value())); |
| __ bind(&done); |
| |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitHasCachedArrayIndex(ZoneList<Expression*>* args) { |
| ASSERT(args->length() == 1); |
| |
| VisitForAccumulatorValue(args->at(0)); |
| |
| if (FLAG_debug_code) { |
| __ AbortIfNotString(eax); |
| } |
| |
| Label materialize_true, materialize_false; |
| Label* if_true = NULL; |
| Label* if_false = NULL; |
| Label* fall_through = NULL; |
| context()->PrepareTest(&materialize_true, &materialize_false, |
| &if_true, &if_false, &fall_through); |
| |
| __ test(FieldOperand(eax, String::kHashFieldOffset), |
| Immediate(String::kContainsCachedArrayIndexMask)); |
| PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false); |
| Split(zero, if_true, if_false, fall_through); |
| |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::EmitGetCachedArrayIndex(ZoneList<Expression*>* args) { |
| ASSERT(args->length() == 1); |
| VisitForAccumulatorValue(args->at(0)); |
| |
| if (FLAG_debug_code) { |
| __ AbortIfNotString(eax); |
| } |
| |
| __ mov(eax, FieldOperand(eax, String::kHashFieldOffset)); |
| __ IndexFromHash(eax, eax); |
| |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::EmitFastAsciiArrayJoin(ZoneList<Expression*>* args) { |
| Label bailout, done, one_char_separator, long_separator, |
| non_trivial_array, not_size_one_array, loop, |
| loop_1, loop_1_condition, loop_2, loop_2_entry, loop_3, loop_3_entry; |
| |
| ASSERT(args->length() == 2); |
| // We will leave the separator on the stack until the end of the function. |
| VisitForStackValue(args->at(1)); |
| // Load this to eax (= array) |
| VisitForAccumulatorValue(args->at(0)); |
| // All aliases of the same register have disjoint lifetimes. |
| Register array = eax; |
| Register elements = no_reg; // Will be eax. |
| |
| Register index = edx; |
| |
| Register string_length = ecx; |
| |
| Register string = esi; |
| |
| Register scratch = ebx; |
| |
| Register array_length = edi; |
| Register result_pos = no_reg; // Will be edi. |
| |
| // Separator operand is already pushed. |
| Operand separator_operand = Operand(esp, 2 * kPointerSize); |
| Operand result_operand = Operand(esp, 1 * kPointerSize); |
| Operand array_length_operand = Operand(esp, 0); |
| __ sub(Operand(esp), Immediate(2 * kPointerSize)); |
| __ cld(); |
| // Check that the array is a JSArray |
| __ test(array, Immediate(kSmiTagMask)); |
| __ j(zero, &bailout); |
| __ CmpObjectType(array, JS_ARRAY_TYPE, scratch); |
| __ j(not_equal, &bailout); |
| |
| // Check that the array has fast elements. |
| __ test_b(FieldOperand(scratch, Map::kBitField2Offset), |
| 1 << Map::kHasFastElements); |
| __ j(zero, &bailout); |
| |
| // If the array has length zero, return the empty string. |
| __ mov(array_length, FieldOperand(array, JSArray::kLengthOffset)); |
| __ SmiUntag(array_length); |
| __ j(not_zero, &non_trivial_array); |
| __ mov(result_operand, Factory::empty_string()); |
| __ jmp(&done); |
| |
| // Save the array length. |
| __ bind(&non_trivial_array); |
| __ mov(array_length_operand, array_length); |
| |
| // Save the FixedArray containing array's elements. |
| // End of array's live range. |
| elements = array; |
| __ mov(elements, FieldOperand(array, JSArray::kElementsOffset)); |
| array = no_reg; |
| |
| |
| // Check that all array elements are sequential ASCII strings, and |
| // accumulate the sum of their lengths, as a smi-encoded value. |
| __ Set(index, Immediate(0)); |
| __ Set(string_length, Immediate(0)); |
| // Loop condition: while (index < length). |
| // Live loop registers: index, array_length, string, |
| // scratch, string_length, elements. |
| if (FLAG_debug_code) { |
| __ cmp(index, Operand(array_length)); |
| __ Assert(less, "No empty arrays here in EmitFastAsciiArrayJoin"); |
| } |
| __ bind(&loop); |
| __ mov(string, FieldOperand(elements, |
| index, |
| times_pointer_size, |
| FixedArray::kHeaderSize)); |
| __ test(string, Immediate(kSmiTagMask)); |
| __ j(zero, &bailout); |
| __ mov(scratch, FieldOperand(string, HeapObject::kMapOffset)); |
| __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset)); |
| __ and_(scratch, Immediate( |
| kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask)); |
| __ cmp(scratch, kStringTag | kAsciiStringTag | kSeqStringTag); |
| __ j(not_equal, &bailout); |
| __ add(string_length, |
| FieldOperand(string, SeqAsciiString::kLengthOffset)); |
| __ j(overflow, &bailout); |
| __ add(Operand(index), Immediate(1)); |
| __ cmp(index, Operand(array_length)); |
| __ j(less, &loop); |
| |
| // If array_length is 1, return elements[0], a string. |
| __ cmp(array_length, 1); |
| __ j(not_equal, ¬_size_one_array); |
| __ mov(scratch, FieldOperand(elements, FixedArray::kHeaderSize)); |
| __ mov(result_operand, scratch); |
| __ jmp(&done); |
| |
| __ bind(¬_size_one_array); |
| |
| // End of array_length live range. |
| result_pos = array_length; |
| array_length = no_reg; |
| |
| // Live registers: |
| // string_length: Sum of string lengths, as a smi. |
| // elements: FixedArray of strings. |
| |
| // Check that the separator is a flat ASCII string. |
| __ mov(string, separator_operand); |
| __ test(string, Immediate(kSmiTagMask)); |
| __ j(zero, &bailout); |
| __ mov(scratch, FieldOperand(string, HeapObject::kMapOffset)); |
| __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset)); |
| __ and_(scratch, Immediate( |
| kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask)); |
| __ cmp(scratch, ASCII_STRING_TYPE); |
| __ j(not_equal, &bailout); |
| |
| // Add (separator length times array_length) - separator length |
| // to string_length. |
| __ mov(scratch, separator_operand); |
| __ mov(scratch, FieldOperand(scratch, SeqAsciiString::kLengthOffset)); |
| __ sub(string_length, Operand(scratch)); // May be negative, temporarily. |
| __ imul(scratch, array_length_operand); |
| __ j(overflow, &bailout); |
| __ add(string_length, Operand(scratch)); |
| __ j(overflow, &bailout); |
| |
| __ shr(string_length, 1); |
| // Live registers and stack values: |
| // string_length |
| // elements |
| __ AllocateAsciiString(result_pos, string_length, scratch, |
| index, string, &bailout); |
| __ mov(result_operand, result_pos); |
| __ lea(result_pos, FieldOperand(result_pos, SeqAsciiString::kHeaderSize)); |
| |
| |
| __ mov(string, separator_operand); |
| __ cmp(FieldOperand(string, SeqAsciiString::kLengthOffset), |
| Immediate(Smi::FromInt(1))); |
| __ j(equal, &one_char_separator); |
| __ j(greater, &long_separator); |
| |
| |
| // Empty separator case |
| __ mov(index, Immediate(0)); |
| __ jmp(&loop_1_condition); |
| // Loop condition: while (index < length). |
| __ bind(&loop_1); |
| // Each iteration of the loop concatenates one string to the result. |
| // Live values in registers: |
| // index: which element of the elements array we are adding to the result. |
| // result_pos: the position to which we are currently copying characters. |
| // elements: the FixedArray of strings we are joining. |
| |
| // Get string = array[index]. |
| __ mov(string, FieldOperand(elements, index, |
| times_pointer_size, |
| FixedArray::kHeaderSize)); |
| __ mov(string_length, |
| FieldOperand(string, String::kLengthOffset)); |
| __ shr(string_length, 1); |
| __ lea(string, |
| FieldOperand(string, SeqAsciiString::kHeaderSize)); |
| __ CopyBytes(string, result_pos, string_length, scratch); |
| __ add(Operand(index), Immediate(1)); |
| __ bind(&loop_1_condition); |
| __ cmp(index, array_length_operand); |
| __ j(less, &loop_1); // End while (index < length). |
| __ jmp(&done); |
| |
| |
| |
| // One-character separator case |
| __ bind(&one_char_separator); |
| // Replace separator with its ascii character value. |
| __ mov_b(scratch, FieldOperand(string, SeqAsciiString::kHeaderSize)); |
| __ mov_b(separator_operand, scratch); |
| |
| __ Set(index, Immediate(0)); |
| // Jump into the loop after the code that copies the separator, so the first |
| // element is not preceded by a separator |
| __ jmp(&loop_2_entry); |
| // Loop condition: while (index < length). |
| __ bind(&loop_2); |
| // Each iteration of the loop concatenates one string to the result. |
| // Live values in registers: |
| // index: which element of the elements array we are adding to the result. |
| // result_pos: the position to which we are currently copying characters. |
| |
| // Copy the separator character to the result. |
| __ mov_b(scratch, separator_operand); |
| __ mov_b(Operand(result_pos, 0), scratch); |
| __ inc(result_pos); |
| |
| __ bind(&loop_2_entry); |
| // Get string = array[index]. |
| __ mov(string, FieldOperand(elements, index, |
| times_pointer_size, |
| FixedArray::kHeaderSize)); |
| __ mov(string_length, |
| FieldOperand(string, String::kLengthOffset)); |
| __ shr(string_length, 1); |
| __ lea(string, |
| FieldOperand(string, SeqAsciiString::kHeaderSize)); |
| __ CopyBytes(string, result_pos, string_length, scratch); |
| __ add(Operand(index), Immediate(1)); |
| |
| __ cmp(index, array_length_operand); |
| __ j(less, &loop_2); // End while (index < length). |
| __ jmp(&done); |
| |
| |
| // Long separator case (separator is more than one character). |
| __ bind(&long_separator); |
| |
| __ Set(index, Immediate(0)); |
| // Jump into the loop after the code that copies the separator, so the first |
| // element is not preceded by a separator |
| __ jmp(&loop_3_entry); |
| // Loop condition: while (index < length). |
| __ bind(&loop_3); |
| // Each iteration of the loop concatenates one string to the result. |
| // Live values in registers: |
| // index: which element of the elements array we are adding to the result. |
| // result_pos: the position to which we are currently copying characters. |
| |
| // Copy the separator to the result. |
| __ mov(string, separator_operand); |
| __ mov(string_length, |
| FieldOperand(string, String::kLengthOffset)); |
| __ shr(string_length, 1); |
| __ lea(string, |
| FieldOperand(string, SeqAsciiString::kHeaderSize)); |
| __ CopyBytes(string, result_pos, string_length, scratch); |
| |
| __ bind(&loop_3_entry); |
| // Get string = array[index]. |
| __ mov(string, FieldOperand(elements, index, |
| times_pointer_size, |
| FixedArray::kHeaderSize)); |
| __ mov(string_length, |
| FieldOperand(string, String::kLengthOffset)); |
| __ shr(string_length, 1); |
| __ lea(string, |
| FieldOperand(string, SeqAsciiString::kHeaderSize)); |
| __ CopyBytes(string, result_pos, string_length, scratch); |
| __ add(Operand(index), Immediate(1)); |
| |
| __ cmp(index, array_length_operand); |
| __ j(less, &loop_3); // End while (index < length). |
| __ jmp(&done); |
| |
| |
| __ bind(&bailout); |
| __ mov(result_operand, Factory::undefined_value()); |
| __ bind(&done); |
| __ mov(eax, result_operand); |
| // Drop temp values from the stack, and restore context register. |
| __ add(Operand(esp), Immediate(3 * kPointerSize)); |
| |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) { |
| Handle<String> name = expr->name(); |
| if (name->length() > 0 && name->Get(0) == '_') { |
| Comment cmnt(masm_, "[ InlineRuntimeCall"); |
| EmitInlineRuntimeCall(expr); |
| return; |
| } |
| |
| Comment cmnt(masm_, "[ CallRuntime"); |
| ZoneList<Expression*>* args = expr->arguments(); |
| |
| if (expr->is_jsruntime()) { |
| // Prepare for calling JS runtime function. |
| __ mov(eax, GlobalObjectOperand()); |
| __ push(FieldOperand(eax, GlobalObject::kBuiltinsOffset)); |
| } |
| |
| // Push the arguments ("left-to-right"). |
| int arg_count = args->length(); |
| for (int i = 0; i < arg_count; i++) { |
| VisitForStackValue(args->at(i)); |
| } |
| |
| if (expr->is_jsruntime()) { |
| // Call the JS runtime function via a call IC. |
| __ Set(ecx, Immediate(expr->name())); |
| InLoopFlag in_loop = (loop_depth() > 0) ? IN_LOOP : NOT_IN_LOOP; |
| Handle<Code> ic = StubCache::ComputeCallInitialize(arg_count, in_loop); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| // Restore context register. |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| } else { |
| // Call the C runtime function. |
| __ CallRuntime(expr->function(), arg_count); |
| } |
| context()->Plug(eax); |
| } |
| |
| |
| void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) { |
| switch (expr->op()) { |
| case Token::DELETE: { |
| Comment cmnt(masm_, "[ UnaryOperation (DELETE)"); |
| Property* prop = expr->expression()->AsProperty(); |
| Variable* var = expr->expression()->AsVariableProxy()->AsVariable(); |
| |
| if (prop != NULL) { |
| if (prop->is_synthetic()) { |
| // Result of deleting parameters is false, even when they rewrite |
| // to accesses on the arguments object. |
| context()->Plug(false); |
| } else { |
| VisitForStackValue(prop->obj()); |
| VisitForStackValue(prop->key()); |
| __ push(Immediate(Smi::FromInt(strict_mode_flag()))); |
| __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION); |
| context()->Plug(eax); |
| } |
| } else if (var != NULL) { |
| // Delete of an unqualified identifier is disallowed in strict mode |
| // but "delete this" is. |
| ASSERT(strict_mode_flag() == kNonStrictMode || var->is_this()); |
| if (var->is_global()) { |
| __ push(GlobalObjectOperand()); |
| __ push(Immediate(var->name())); |
| __ push(Immediate(Smi::FromInt(kNonStrictMode))); |
| __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION); |
| context()->Plug(eax); |
| } else if (var->AsSlot() != NULL && |
| var->AsSlot()->type() != Slot::LOOKUP) { |
| // Result of deleting non-global, non-dynamic variables is false. |
| // The subexpression does not have side effects. |
| context()->Plug(false); |
| } else { |
| // Non-global variable. Call the runtime to try to delete from the |
| // context where the variable was introduced. |
| __ push(context_register()); |
| __ push(Immediate(var->name())); |
| __ CallRuntime(Runtime::kDeleteContextSlot, 2); |
| context()->Plug(eax); |
| } |
| } else { |
| // Result of deleting non-property, non-variable reference is true. |
| // The subexpression may have side effects. |
| VisitForEffect(expr->expression()); |
| context()->Plug(true); |
| } |
| break; |
| } |
| |
| case Token::VOID: { |
| Comment cmnt(masm_, "[ UnaryOperation (VOID)"); |
| VisitForEffect(expr->expression()); |
| context()->Plug(Factory::undefined_value()); |
| break; |
| } |
| |
| case Token::NOT: { |
| Comment cmnt(masm_, "[ UnaryOperation (NOT)"); |
| if (context()->IsEffect()) { |
| // Unary NOT has no side effects so it's only necessary to visit the |
| // subexpression. Match the optimizing compiler by not branching. |
| VisitForEffect(expr->expression()); |
| } else { |
| Label materialize_true, materialize_false; |
| Label* if_true = NULL; |
| Label* if_false = NULL; |
| Label* fall_through = NULL; |
| |
| // Notice that the labels are swapped. |
| context()->PrepareTest(&materialize_true, &materialize_false, |
| &if_false, &if_true, &fall_through); |
| if (context()->IsTest()) ForwardBailoutToChild(expr); |
| VisitForControl(expr->expression(), if_true, if_false, fall_through); |
| context()->Plug(if_false, if_true); // Labels swapped. |
| } |
| break; |
| } |
| |
| case Token::TYPEOF: { |
| Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)"); |
| { StackValueContext context(this); |
| VisitForTypeofValue(expr->expression()); |
| } |
| __ CallRuntime(Runtime::kTypeof, 1); |
| context()->Plug(eax); |
| break; |
| } |
| |
| case Token::ADD: { |
| Comment cmt(masm_, "[ UnaryOperation (ADD)"); |
| VisitForAccumulatorValue(expr->expression()); |
| Label no_conversion; |
| __ test(result_register(), Immediate(kSmiTagMask)); |
| __ j(zero, &no_conversion); |
| ToNumberStub convert_stub; |
| __ CallStub(&convert_stub); |
| __ bind(&no_conversion); |
| context()->Plug(result_register()); |
| break; |
| } |
| |
| case Token::SUB: { |
| Comment cmt(masm_, "[ UnaryOperation (SUB)"); |
| bool can_overwrite = expr->expression()->ResultOverwriteAllowed(); |
| UnaryOverwriteMode overwrite = |
| can_overwrite ? UNARY_OVERWRITE : UNARY_NO_OVERWRITE; |
| GenericUnaryOpStub stub(Token::SUB, overwrite, NO_UNARY_FLAGS); |
| // GenericUnaryOpStub expects the argument to be in the |
| // accumulator register eax. |
| VisitForAccumulatorValue(expr->expression()); |
| __ CallStub(&stub); |
| context()->Plug(eax); |
| break; |
| } |
| |
| case Token::BIT_NOT: { |
| Comment cmt(masm_, "[ UnaryOperation (BIT_NOT)"); |
| // The generic unary operation stub expects the argument to be |
| // in the accumulator register eax. |
| VisitForAccumulatorValue(expr->expression()); |
| Label done; |
| bool inline_smi_case = ShouldInlineSmiCase(expr->op()); |
| if (inline_smi_case) { |
| NearLabel call_stub; |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(not_zero, &call_stub); |
| __ lea(eax, Operand(eax, kSmiTagMask)); |
| __ not_(eax); |
| __ jmp(&done); |
| __ bind(&call_stub); |
| } |
| bool overwrite = expr->expression()->ResultOverwriteAllowed(); |
| UnaryOverwriteMode mode = |
| overwrite ? UNARY_OVERWRITE : UNARY_NO_OVERWRITE; |
| UnaryOpFlags flags = inline_smi_case |
| ? NO_UNARY_SMI_CODE_IN_STUB |
| : NO_UNARY_FLAGS; |
| GenericUnaryOpStub stub(Token::BIT_NOT, mode, flags); |
| __ CallStub(&stub); |
| __ bind(&done); |
| context()->Plug(eax); |
| break; |
| } |
| |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitCountOperation(CountOperation* expr) { |
| Comment cmnt(masm_, "[ CountOperation"); |
| SetSourcePosition(expr->position()); |
| |
| // Invalid left-hand sides are rewritten to have a 'throw ReferenceError' |
| // as the left-hand side. |
| if (!expr->expression()->IsValidLeftHandSide()) { |
| VisitForEffect(expr->expression()); |
| return; |
| } |
| |
| // Expression can only be a property, a global or a (parameter or local) |
| // slot. Variables with rewrite to .arguments are treated as KEYED_PROPERTY. |
| enum LhsKind { VARIABLE, NAMED_PROPERTY, KEYED_PROPERTY }; |
| LhsKind assign_type = VARIABLE; |
| Property* prop = expr->expression()->AsProperty(); |
| // In case of a property we use the uninitialized expression context |
| // of the key to detect a named property. |
| if (prop != NULL) { |
| assign_type = |
| (prop->key()->IsPropertyName()) ? NAMED_PROPERTY : KEYED_PROPERTY; |
| } |
| |
| // Evaluate expression and get value. |
| if (assign_type == VARIABLE) { |
| ASSERT(expr->expression()->AsVariableProxy()->var() != NULL); |
| AccumulatorValueContext context(this); |
| EmitVariableLoad(expr->expression()->AsVariableProxy()->var()); |
| } else { |
| // Reserve space for result of postfix operation. |
| if (expr->is_postfix() && !context()->IsEffect()) { |
| __ push(Immediate(Smi::FromInt(0))); |
| } |
| if (assign_type == NAMED_PROPERTY) { |
| // Put the object both on the stack and in the accumulator. |
| VisitForAccumulatorValue(prop->obj()); |
| __ push(eax); |
| EmitNamedPropertyLoad(prop); |
| } else { |
| if (prop->is_arguments_access()) { |
| VariableProxy* obj_proxy = prop->obj()->AsVariableProxy(); |
| MemOperand slot_operand = |
| EmitSlotSearch(obj_proxy->var()->AsSlot(), ecx); |
| __ push(slot_operand); |
| __ mov(eax, Immediate(prop->key()->AsLiteral()->handle())); |
| } else { |
| VisitForStackValue(prop->obj()); |
| VisitForAccumulatorValue(prop->key()); |
| } |
| __ mov(edx, Operand(esp, 0)); |
| __ push(eax); |
| EmitKeyedPropertyLoad(prop); |
| } |
| } |
| |
| // We need a second deoptimization point after loading the value |
| // in case evaluating the property load my have a side effect. |
| PrepareForBailout(expr->increment(), TOS_REG); |
| |
| // Call ToNumber only if operand is not a smi. |
| NearLabel no_conversion; |
| if (ShouldInlineSmiCase(expr->op())) { |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(zero, &no_conversion); |
| } |
| ToNumberStub convert_stub; |
| __ CallStub(&convert_stub); |
| __ bind(&no_conversion); |
| |
| // Save result for postfix expressions. |
| if (expr->is_postfix()) { |
| if (!context()->IsEffect()) { |
| // Save the result on the stack. If we have a named or keyed property |
| // we store the result under the receiver that is currently on top |
| // of the stack. |
| switch (assign_type) { |
| case VARIABLE: |
| __ push(eax); |
| break; |
| case NAMED_PROPERTY: |
| __ mov(Operand(esp, kPointerSize), eax); |
| break; |
| case KEYED_PROPERTY: |
| __ mov(Operand(esp, 2 * kPointerSize), eax); |
| break; |
| } |
| } |
| } |
| |
| // Inline smi case if we are in a loop. |
| NearLabel stub_call, done; |
| JumpPatchSite patch_site(masm_); |
| |
| if (ShouldInlineSmiCase(expr->op())) { |
| if (expr->op() == Token::INC) { |
| __ add(Operand(eax), Immediate(Smi::FromInt(1))); |
| } else { |
| __ sub(Operand(eax), Immediate(Smi::FromInt(1))); |
| } |
| __ j(overflow, &stub_call); |
| // We could eliminate this smi check if we split the code at |
| // the first smi check before calling ToNumber. |
| patch_site.EmitJumpIfSmi(eax, &done); |
| |
| __ bind(&stub_call); |
| // Call stub. Undo operation first. |
| if (expr->op() == Token::INC) { |
| __ sub(Operand(eax), Immediate(Smi::FromInt(1))); |
| } else { |
| __ add(Operand(eax), Immediate(Smi::FromInt(1))); |
| } |
| } |
| |
| // Record position before stub call. |
| SetSourcePosition(expr->position()); |
| |
| // Call stub for +1/-1. |
| __ mov(edx, eax); |
| __ mov(eax, Immediate(Smi::FromInt(1))); |
| TypeRecordingBinaryOpStub stub(expr->binary_op(), NO_OVERWRITE); |
| EmitCallIC(stub.GetCode(), &patch_site); |
| __ bind(&done); |
| |
| // Store the value returned in eax. |
| switch (assign_type) { |
| case VARIABLE: |
| if (expr->is_postfix()) { |
| // Perform the assignment as if via '='. |
| { EffectContext context(this); |
| EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(), |
| Token::ASSIGN); |
| PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| context.Plug(eax); |
| } |
| // For all contexts except EffectContext We have the result on |
| // top of the stack. |
| if (!context()->IsEffect()) { |
| context()->PlugTOS(); |
| } |
| } else { |
| // Perform the assignment as if via '='. |
| EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(), |
| Token::ASSIGN); |
| PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| context()->Plug(eax); |
| } |
| break; |
| case NAMED_PROPERTY: { |
| __ mov(ecx, prop->key()->AsLiteral()->handle()); |
| __ pop(edx); |
| Handle<Code> ic(Builtins::builtin( |
| is_strict() ? Builtins::StoreIC_Initialize_Strict |
| : Builtins::StoreIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| if (expr->is_postfix()) { |
| if (!context()->IsEffect()) { |
| context()->PlugTOS(); |
| } |
| } else { |
| context()->Plug(eax); |
| } |
| break; |
| } |
| case KEYED_PROPERTY: { |
| __ pop(ecx); |
| __ pop(edx); |
| Handle<Code> ic(Builtins::builtin( |
| is_strict() ? Builtins::KeyedStoreIC_Initialize_Strict |
| : Builtins::KeyedStoreIC_Initialize)); |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| PrepareForBailoutForId(expr->AssignmentId(), TOS_REG); |
| if (expr->is_postfix()) { |
| // Result is on the stack |
| if (!context()->IsEffect()) { |
| context()->PlugTOS(); |
| } |
| } else { |
| context()->Plug(eax); |
| } |
| break; |
| } |
| } |
| } |
| |
| |
| void FullCodeGenerator::VisitForTypeofValue(Expression* expr) { |
| VariableProxy* proxy = expr->AsVariableProxy(); |
| ASSERT(!context()->IsEffect()); |
| ASSERT(!context()->IsTest()); |
| |
| if (proxy != NULL && !proxy->var()->is_this() && proxy->var()->is_global()) { |
| Comment cmnt(masm_, "Global variable"); |
| __ mov(eax, GlobalObjectOperand()); |
| __ mov(ecx, Immediate(proxy->name())); |
| Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize)); |
| // Use a regular load, not a contextual load, to avoid a reference |
| // error. |
| EmitCallIC(ic, RelocInfo::CODE_TARGET); |
| PrepareForBailout(expr, TOS_REG); |
| context()->Plug(eax); |
| } else if (proxy != NULL && |
| proxy->var()->AsSlot() != NULL && |
| proxy->var()->AsSlot()->type() == Slot::LOOKUP) { |
| Label done, slow; |
| |
| // Generate code for loading from variables potentially shadowed |
| // by eval-introduced variables. |
| Slot* slot = proxy->var()->AsSlot(); |
| EmitDynamicLoadFromSlotFastCase(slot, INSIDE_TYPEOF, &slow, &done); |
| |
| __ bind(&slow); |
| __ push(esi); |
| __ push(Immediate(proxy->name())); |
| __ CallRuntime(Runtime::kLoadContextSlotNoReferenceError, 2); |
| PrepareForBailout(expr, TOS_REG); |
| __ bind(&done); |
| |
| context()->Plug(eax); |
| } else { |
| // This expression cannot throw a reference error at the top level. |
| context()->HandleExpression(expr); |
| } |
| } |
| |
| |
| bool FullCodeGenerator::TryLiteralCompare(Token::Value op, |
| Expression* left, |
| Expression* right, |
| Label* if_true, |
| Label* if_false, |
| Label* fall_through) { |
| if (op != Token::EQ && op != Token::EQ_STRICT) return false; |
| |
| // Check for the pattern: typeof <expression> == <string literal>. |
| Literal* right_literal = right->AsLiteral(); |
| if (right_literal == NULL) return false; |
| Handle<Object> right_literal_value = right_literal->handle(); |
| if (!right_literal_value->IsString()) return false; |
| UnaryOperation* left_unary = left->AsUnaryOperation(); |
| if (left_unary == NULL || left_unary->op() != Token::TYPEOF) return false; |
| Handle<String> check = Handle<String>::cast(right_literal_value); |
| |
| { AccumulatorValueContext context(this); |
| VisitForTypeofValue(left_unary->expression()); |
| } |
| PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false); |
| |
| if (check->Equals(Heap::number_symbol())) { |
| __ JumpIfSmi(eax, if_true); |
| __ cmp(FieldOperand(eax, HeapObject::kMapOffset), |
| Factory::heap_number_map()); |
| Split(equal, if_true, if_false, fall_through); |
| } else if (check->Equals(Heap::string_symbol())) { |
| __ JumpIfSmi(eax, if_false); |
| __ CmpObjectType(eax, FIRST_NONSTRING_TYPE, edx); |
| __ j(above_equal, if_false); |
| // Check for undetectable objects => false. |
| __ test_b(FieldOperand(edx, Map::kBitFieldOffset), |
| 1 << Map::kIsUndetectable); |
| Split(zero, if_true, if_false, fall_through); |
| } else if (check->Equals(Heap::boolean_symbol())) { |
| __ cmp(eax, Factory::true_value()); |
| __ j(equal, if_true); |
| __ cmp(eax, Factory::false_value()); |
| Split(equal, if_true, if_false, fall_through); |
| } else if (check->Equals(Heap::undefined_symbol())) { |
| __ cmp(eax, Factory::undefined_value()); |
| __ j(equal, if_true); |
| __ JumpIfSmi(eax, if_false); |
| // Check for undetectable objects => true. |
| __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| __ movzx_b(ecx, FieldOperand(edx, Map::kBitFieldOffset)); |
| __ test(ecx, Immediate(1 << Map::kIsUndetectable)); |
| Split(not_zero, if_true, if_false, fall_through); |
| } else if (check->Equals(Heap::function_symbol())) { |
| __ JumpIfSmi(eax, if_false); |
| __ CmpObjectType(eax, FIRST_FUNCTION_CLASS_TYPE, edx); |
| Split(above_equal, if_true, if_false, fall_through); |
| } else if (check->Equals(Heap::object_symbol())) { |
| __ JumpIfSmi(eax, if_false); |
| __ cmp(eax, Factory::null_value()); |
| __ j(equal, if_true); |
| __ CmpObjectType(eax, FIRST_JS_OBJECT_TYPE, edx); |
| __ j(below, if_false); |
| __ CmpInstanceType(edx, FIRST_FUNCTION_CLASS_TYPE); |
| __ j(above_equal, if_false); |
| // Check for undetectable objects => false. |
| __ test_b(FieldOperand(edx, Map::kBitFieldOffset), |
| 1 << Map::kIsUndetectable); |
| Split(zero, if_true, if_false, fall_through); |
| } else { |
| if (if_false != fall_through) __ jmp(if_false); |
| } |
| |
| return true; |
| } |
| |
| |
| void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) { |
| Comment cmnt(masm_, "[ CompareOperation"); |
| SetSourcePosition(expr->position()); |
| |
| // 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); |
| |
| // First we try a fast inlined version of the compare when one of |
| // the operands is a literal. |
| Token::Value op = expr->op(); |
| Expression* left = expr->left(); |
| Expression* right = expr->right(); |
| if (TryLiteralCompare(op, left, right, if_true, if_false, fall_through)) { |
| context()->Plug(if_true, if_false); |
| return; |
| } |
| |
| VisitForStackValue(expr->left()); |
| switch (expr->op()) { |
| case Token::IN: |
| VisitForStackValue(expr->right()); |
| __ InvokeBuiltin(Builtins::IN, CALL_FUNCTION); |
| PrepareForBailoutBeforeSplit(TOS_REG, false, NULL, NULL); |
| __ cmp(eax, Factory::true_value()); |
| Split(equal, if_true, if_false, fall_through); |
| break; |
| |
| case Token::INSTANCEOF: { |
| VisitForStackValue(expr->right()); |
| InstanceofStub stub(InstanceofStub::kNoFlags); |
| __ CallStub(&stub); |
| PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false); |
| __ test(eax, Operand(eax)); |
| // The stub returns 0 for true. |
| Split(zero, if_true, if_false, fall_through); |
| break; |
| } |
| |
| default: { |
| VisitForAccumulatorValue(expr->right()); |
| Condition cc = no_condition; |
| bool strict = false; |
| switch (op) { |
| case Token::EQ_STRICT: |
| strict = true; |
| // Fall through |
| case Token::EQ: |
| cc = equal; |
| __ pop(edx); |
| break; |
| case Token::LT: |
| cc = less; |
| __ pop(edx); |
| break; |
| case Token::GT: |
| // Reverse left and right sizes to obtain ECMA-262 conversion order. |
| cc = less; |
| __ mov(edx, result_register()); |
| __ pop(eax); |
| break; |
| case Token::LTE: |
| // Reverse left and right sizes to obtain ECMA-262 conversion order. |
| cc = greater_equal; |
| __ mov(edx, result_register()); |
| __ pop(eax); |
| break; |
| case Token::GTE: |
| cc = greater_equal; |
| __ pop(edx); |
| break; |
| case Token::IN: |
| case Token::INSTANCEOF: |
| default: |
| UNREACHABLE(); |
| } |
| |
| bool inline_smi_code = ShouldInlineSmiCase(op); |
| JumpPatchSite patch_site(masm_); |
| if (inline_smi_code) { |
| NearLabel slow_case; |
| __ mov(ecx, Operand(edx)); |
| __ or_(ecx, Operand(eax)); |
| patch_site.EmitJumpIfNotSmi(ecx, &slow_case); |
| __ cmp(edx, Operand(eax)); |
| Split(cc, if_true, if_false, NULL); |
| __ bind(&slow_case); |
| } |
| |
| // Record position and call the compare IC. |
| SetSourcePosition(expr->position()); |
| Handle<Code> ic = CompareIC::GetUninitialized(op); |
| EmitCallIC(ic, &patch_site); |
| |
| PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false); |
| __ test(eax, Operand(eax)); |
| Split(cc, if_true, if_false, fall_through); |
| } |
| } |
| |
| // Convert the result of the comparison into one expected for this |
| // expression's context. |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::VisitCompareToNull(CompareToNull* expr) { |
| 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(expr->expression()); |
| PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false); |
| |
| __ cmp(eax, Factory::null_value()); |
| if (expr->is_strict()) { |
| Split(equal, if_true, if_false, fall_through); |
| } else { |
| __ j(equal, if_true); |
| __ cmp(eax, Factory::undefined_value()); |
| __ j(equal, if_true); |
| __ test(eax, Immediate(kSmiTagMask)); |
| __ j(zero, if_false); |
| // It can be an undetectable object. |
| __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| __ movzx_b(edx, FieldOperand(edx, Map::kBitFieldOffset)); |
| __ test(edx, Immediate(1 << Map::kIsUndetectable)); |
| Split(not_zero, if_true, if_false, fall_through); |
| } |
| context()->Plug(if_true, if_false); |
| } |
| |
| |
| void FullCodeGenerator::VisitThisFunction(ThisFunction* expr) { |
| __ mov(eax, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| context()->Plug(eax); |
| } |
| |
| |
| Register FullCodeGenerator::result_register() { |
| return eax; |
| } |
| |
| |
| Register FullCodeGenerator::context_register() { |
| return esi; |
| } |
| |
| |
| void FullCodeGenerator::EmitCallIC(Handle<Code> ic, RelocInfo::Mode mode) { |
| ASSERT(mode == RelocInfo::CODE_TARGET || |
| mode == RelocInfo::CODE_TARGET_CONTEXT); |
| switch (ic->kind()) { |
| case Code::LOAD_IC: |
| __ IncrementCounter(&Counters::named_load_full, 1); |
| break; |
| case Code::KEYED_LOAD_IC: |
| __ IncrementCounter(&Counters::keyed_load_full, 1); |
| break; |
| case Code::STORE_IC: |
| __ IncrementCounter(&Counters::named_store_full, 1); |
| break; |
| case Code::KEYED_STORE_IC: |
| __ IncrementCounter(&Counters::keyed_store_full, 1); |
| default: |
| break; |
| } |
| |
| __ call(ic, mode); |
| |
| // Crankshaft doesn't need patching of inlined loads and stores. |
| // When compiling the snapshot we need to produce code that works |
| // with and without Crankshaft. |
| if (V8::UseCrankshaft() && !Serializer::enabled()) { |
| return; |
| } |
| |
| // If we're calling a (keyed) load or store stub, we have to mark |
| // the call as containing no inlined code so we will not attempt to |
| // patch it. |
| switch (ic->kind()) { |
| case Code::LOAD_IC: |
| case Code::KEYED_LOAD_IC: |
| case Code::STORE_IC: |
| case Code::KEYED_STORE_IC: |
| __ nop(); // Signals no inlined code. |
| break; |
| default: |
| // Do nothing. |
| break; |
| } |
| } |
| |
| |
| void FullCodeGenerator::EmitCallIC(Handle<Code> ic, JumpPatchSite* patch_site) { |
| switch (ic->kind()) { |
| case Code::LOAD_IC: |
| __ IncrementCounter(&Counters::named_load_full, 1); |
| break; |
| case Code::KEYED_LOAD_IC: |
| __ IncrementCounter(&Counters::keyed_load_full, 1); |
| break; |
| case Code::STORE_IC: |
| __ IncrementCounter(&Counters::named_store_full, 1); |
| break; |
| case Code::KEYED_STORE_IC: |
| __ IncrementCounter(&Counters::keyed_store_full, 1); |
| default: |
| break; |
| } |
| |
| __ call(ic, RelocInfo::CODE_TARGET); |
| if (patch_site != NULL && patch_site->is_bound()) { |
| patch_site->EmitPatchInfo(); |
| } else { |
| __ nop(); // Signals no inlined code. |
| } |
| } |
| |
| |
| void FullCodeGenerator::StoreToFrameField(int frame_offset, Register value) { |
| ASSERT_EQ(POINTER_SIZE_ALIGN(frame_offset), frame_offset); |
| __ mov(Operand(ebp, frame_offset), value); |
| } |
| |
| |
| void FullCodeGenerator::LoadContextField(Register dst, int context_index) { |
| __ mov(dst, ContextOperand(esi, context_index)); |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| // Non-local control flow support. |
| |
| void FullCodeGenerator::EnterFinallyBlock() { |
| // Cook return address on top of stack (smi encoded Code* delta) |
| ASSERT(!result_register().is(edx)); |
| __ mov(edx, Operand(esp, 0)); |
| __ sub(Operand(edx), Immediate(masm_->CodeObject())); |
| ASSERT_EQ(1, kSmiTagSize + kSmiShiftSize); |
| ASSERT_EQ(0, kSmiTag); |
| __ add(edx, Operand(edx)); // Convert to smi. |
| __ mov(Operand(esp, 0), edx); |
| // Store result register while executing finally block. |
| __ push(result_register()); |
| } |
| |
| |
| void FullCodeGenerator::ExitFinallyBlock() { |
| ASSERT(!result_register().is(edx)); |
| // Restore result register from stack. |
| __ pop(result_register()); |
| // Uncook return address. |
| __ mov(edx, Operand(esp, 0)); |
| __ sar(edx, 1); // Convert smi to int. |
| __ add(Operand(edx), Immediate(masm_->CodeObject())); |
| __ mov(Operand(esp, 0), edx); |
| // And return. |
| __ ret(0); |
| } |
| |
| |
| #undef __ |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_TARGET_ARCH_IA32 |
