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

Issue 549109: Rename the fast-codegen* files to full-codegen*. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 10 years, 11 months ago
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Index: src/ia32/fast-codegen-ia32.cc
===================================================================
--- src/ia32/fast-codegen-ia32.cc (revision 3660)
+++ src/ia32/fast-codegen-ia32.cc (working copy)
@@ -1,1804 +0,0 @@
-// Copyright 2009 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"
-
-#include "codegen-inl.h"
-#include "compiler.h"
-#include "debug.h"
-#include "fast-codegen.h"
-#include "parser.h"
-
-namespace v8 {
-namespace internal {
-
-#define __ ACCESS_MASM(masm_)
-
-// 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(FunctionLiteral* fun) {
- function_ = fun;
- SetFunctionPosition(fun);
-
- __ 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 = fun->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.
- if (fun->scope()->num_heap_slots() > 0) {
- Comment cmnt(masm_, "[ Allocate local context");
- // Argument to NewContext is the function, which is still in edi.
- __ push(edi);
- __ 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 = fun->scope()->num_parameters();
- for (int i = 0; i < num_parameters; i++) {
- Slot* slot = fun->scope()->parameter(i)->slot();
- 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
- __ mov(Operand(esi, Context::SlotOffset(slot->index())), eax);
- }
- }
- }
-
- Variable* arguments = fun->scope()->arguments()->AsVariable();
- 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.
- __ lea(edx, Operand(ebp, StandardFrameConstants::kCallerSPOffset +
- fun->num_parameters() * kPointerSize));
- __ push(edx);
- __ push(Immediate(Smi::FromInt(fun->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->slot(), eax, ebx, edx);
- Slot* dot_arguments_slot =
- fun->scope()->arguments_shadow()->AsVariable()->slot();
- Move(dot_arguments_slot, ecx, ebx, edx);
- }
-
- { Comment cmnt(masm_, "[ Declarations");
- VisitDeclarations(fun->scope()->declarations());
- }
-
- { Comment cmnt(masm_, "[ Stack check");
- Label 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);
- }
-
- if (FLAG_trace) {
- __ CallRuntime(Runtime::kTraceEnter, 0);
- }
-
- { Comment cmnt(masm_, "[ Body");
- ASSERT(loop_depth() == 0);
- VisitStatements(fun->body());
- ASSERT(loop_depth() == 0);
- }
-
- { Comment cmnt(masm_, "[ return <undefined>;");
- // Emit a 'return undefined' in case control fell off the end of the body.
- __ mov(eax, Factory::undefined_value());
- EmitReturnSequence(function_->end_position());
- }
-}
-
-
-void FullCodeGenerator::EmitReturnSequence(int position) {
- 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
- CodeGenerator::RecordPositions(masm_, position);
- __ 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);
- __ ret((function_->scope()->num_parameters() + 1) * kPointerSize);
-#ifdef ENABLE_DEBUGGER_SUPPORT
- // Check that the size of the code used for returning matches what is
- // expected by the debugger.
- ASSERT_EQ(Assembler::kJSReturnSequenceLength,
- masm_->SizeOfCodeGeneratedSince(&check_exit_codesize));
-#endif
- }
-}
-
-
-void FullCodeGenerator::Apply(Expression::Context context, Register reg) {
- switch (context) {
- case Expression::kUninitialized:
- UNREACHABLE();
-
- case Expression::kEffect:
- // Nothing to do.
- break;
-
- case Expression::kValue:
- // Move value into place.
- switch (location_) {
- case kAccumulator:
- if (!reg.is(result_register())) __ mov(result_register(), reg);
- break;
- case kStack:
- __ push(reg);
- break;
- }
- break;
-
- case Expression::kTest:
- // For simplicity we always test the accumulator register.
- if (!reg.is(result_register())) __ mov(result_register(), reg);
- DoTest(context);
- break;
-
- case Expression::kValueTest:
- case Expression::kTestValue:
- if (!reg.is(result_register())) __ mov(result_register(), reg);
- switch (location_) {
- case kAccumulator:
- break;
- case kStack:
- __ push(result_register());
- break;
- }
- DoTest(context);
- break;
- }
-}
-
-
-void FullCodeGenerator::Apply(Expression::Context context, Slot* slot) {
- switch (context) {
- case Expression::kUninitialized:
- UNREACHABLE();
- case Expression::kEffect:
- // Nothing to do.
- break;
- case Expression::kValue: {
- MemOperand slot_operand = EmitSlotSearch(slot, result_register());
- switch (location_) {
- case kAccumulator:
- __ mov(result_register(), slot_operand);
- break;
- case kStack:
- // Memory operands can be pushed directly.
- __ push(slot_operand);
- break;
- }
- break;
- }
-
- case Expression::kTest:
- // For simplicity we always test the accumulator register.
- Move(result_register(), slot);
- DoTest(context);
- break;
-
- case Expression::kValueTest:
- case Expression::kTestValue:
- Move(result_register(), slot);
- switch (location_) {
- case kAccumulator:
- break;
- case kStack:
- __ push(result_register());
- break;
- }
- DoTest(context);
- break;
- }
-}
-
-
-void FullCodeGenerator::Apply(Expression::Context context, Literal* lit) {
- switch (context) {
- case Expression::kUninitialized:
- UNREACHABLE();
- case Expression::kEffect:
- // Nothing to do.
- break;
- case Expression::kValue:
- switch (location_) {
- case kAccumulator:
- __ mov(result_register(), lit->handle());
- break;
- case kStack:
- // Immediates can be pushed directly.
- __ push(Immediate(lit->handle()));
- break;
- }
- break;
-
- case Expression::kTest:
- // For simplicity we always test the accumulator register.
- __ mov(result_register(), lit->handle());
- DoTest(context);
- break;
-
- case Expression::kValueTest:
- case Expression::kTestValue:
- __ mov(result_register(), lit->handle());
- switch (location_) {
- case kAccumulator:
- break;
- case kStack:
- __ push(result_register());
- break;
- }
- DoTest(context);
- break;
- }
-}
-
-
-void FullCodeGenerator::ApplyTOS(Expression::Context context) {
- switch (context) {
- case Expression::kUninitialized:
- UNREACHABLE();
-
- case Expression::kEffect:
- __ Drop(1);
- break;
-
- case Expression::kValue:
- switch (location_) {
- case kAccumulator:
- __ pop(result_register());
- break;
- case kStack:
- break;
- }
- break;
-
- case Expression::kTest:
- // For simplicity we always test the accumulator register.
- __ pop(result_register());
- DoTest(context);
- break;
-
- case Expression::kValueTest:
- case Expression::kTestValue:
- switch (location_) {
- case kAccumulator:
- __ pop(result_register());
- break;
- case kStack:
- __ mov(result_register(), Operand(esp, 0));
- break;
- }
- DoTest(context);
- break;
- }
-}
-
-
-void FullCodeGenerator::DropAndApply(int count,
- Expression::Context context,
- Register reg) {
- ASSERT(count > 0);
- ASSERT(!reg.is(esp));
- switch (context) {
- case Expression::kUninitialized:
- UNREACHABLE();
-
- case Expression::kEffect:
- __ Drop(count);
- break;
-
- case Expression::kValue:
- switch (location_) {
- case kAccumulator:
- __ Drop(count);
- if (!reg.is(result_register())) __ mov(result_register(), reg);
- break;
- case kStack:
- if (count > 1) __ Drop(count - 1);
- __ mov(Operand(esp, 0), reg);
- break;
- }
- break;
-
- case Expression::kTest:
- // For simplicity we always test the accumulator register.
- __ Drop(count);
- if (!reg.is(result_register())) __ mov(result_register(), reg);
- DoTest(context);
- break;
-
- case Expression::kValueTest:
- case Expression::kTestValue:
- switch (location_) {
- case kAccumulator:
- __ Drop(count);
- if (!reg.is(result_register())) __ mov(result_register(), reg);
- break;
- case kStack:
- if (count > 1) __ Drop(count - 1);
- __ mov(result_register(), reg);
- __ mov(Operand(esp, 0), result_register());
- break;
- }
- DoTest(context);
- break;
- }
-}
-
-
-void FullCodeGenerator::Apply(Expression::Context context,
- Label* materialize_true,
- Label* materialize_false) {
- switch (context) {
- case Expression::kUninitialized:
-
- case Expression::kEffect:
- ASSERT_EQ(materialize_true, materialize_false);
- __ bind(materialize_true);
- break;
-
- case Expression::kValue: {
- Label done;
- switch (location_) {
- case kAccumulator:
- __ bind(materialize_true);
- __ mov(result_register(), Factory::true_value());
- __ jmp(&done);
- __ bind(materialize_false);
- __ mov(result_register(), Factory::false_value());
- break;
- case kStack:
- __ bind(materialize_true);
- __ push(Immediate(Factory::true_value()));
- __ jmp(&done);
- __ bind(materialize_false);
- __ push(Immediate(Factory::false_value()));
- break;
- }
- __ bind(&done);
- break;
- }
-
- case Expression::kTest:
- break;
-
- case Expression::kValueTest:
- __ bind(materialize_true);
- switch (location_) {
- case kAccumulator:
- __ mov(result_register(), Factory::true_value());
- break;
- case kStack:
- __ push(Immediate(Factory::true_value()));
- break;
- }
- __ jmp(true_label_);
- break;
-
- case Expression::kTestValue:
- __ bind(materialize_false);
- switch (location_) {
- case kAccumulator:
- __ mov(result_register(), Factory::false_value());
- break;
- case kStack:
- __ push(Immediate(Factory::false_value()));
- break;
- }
- __ jmp(false_label_);
- break;
- }
-}
-
-
-void FullCodeGenerator::DoTest(Expression::Context context) {
- // The value to test is in the accumulator. If the value might be needed
- // on the stack (value/test and test/value contexts with a stack location
- // desired), then the value is already duplicated on the stack.
- ASSERT_NE(NULL, true_label_);
- ASSERT_NE(NULL, false_label_);
-
- // In value/test and test/value expression contexts with stack as the
- // desired location, there is already an extra value on the stack. Use a
- // label to discard it if unneeded.
- Label discard;
- Label* if_true = true_label_;
- Label* if_false = false_label_;
- switch (context) {
- case Expression::kUninitialized:
- case Expression::kEffect:
- case Expression::kValue:
- UNREACHABLE();
- case Expression::kTest:
- break;
- case Expression::kValueTest:
- switch (location_) {
- case kAccumulator:
- break;
- case kStack:
- if_false = &discard;
- break;
- }
- break;
- case Expression::kTestValue:
- switch (location_) {
- case kAccumulator:
- break;
- case kStack:
- if_true = &discard;
- break;
- }
- break;
- }
-
- // 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);
- ASSERT_EQ(0, kSmiTag);
- __ test(result_register(), Operand(result_register()));
- __ j(zero, if_false);
- __ test(result_register(), Immediate(kSmiTagMask));
- __ j(zero, if_true);
-
- // Save a copy of the value if it may be needed and isn't already saved.
- switch (context) {
- case Expression::kUninitialized:
- case Expression::kEffect:
- case Expression::kValue:
- UNREACHABLE();
- case Expression::kTest:
- break;
- case Expression::kValueTest:
- switch (location_) {
- case kAccumulator:
- __ push(result_register());
- break;
- case kStack:
- break;
- }
- break;
- case Expression::kTestValue:
- switch (location_) {
- case kAccumulator:
- __ push(result_register());
- break;
- case kStack:
- break;
- }
- break;
- }
-
- // 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. Complete based on the context.
- switch (context) {
- case Expression::kUninitialized:
- case Expression::kEffect:
- case Expression::kValue:
- UNREACHABLE();
-
- case Expression::kTest:
- __ j(not_zero, true_label_);
- __ jmp(false_label_);
- break;
-
- case Expression::kValueTest:
- switch (location_) {
- case kAccumulator:
- __ j(zero, &discard);
- __ pop(result_register());
- __ jmp(true_label_);
- break;
- case kStack:
- __ j(not_zero, true_label_);
- break;
- }
- __ bind(&discard);
- __ Drop(1);
- __ jmp(false_label_);
- break;
-
- case Expression::kTestValue:
- switch (location_) {
- case kAccumulator:
- __ j(not_zero, &discard);
- __ pop(result_register());
- __ jmp(false_label_);
- break;
- case kStack:
- __ j(zero, false_label_);
- break;
- }
- __ bind(&discard);
- __ Drop(1);
- __ jmp(true_label_);
- break;
- }
-}
-
-
-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 =
- function_->scope()->ContextChainLength(slot->var()->scope());
- __ LoadContext(scratch, context_chain_length);
- return CodeGenerator::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 = FixedArray::kHeaderSize + dst->index() * kPointerSize;
- __ RecordWrite(scratch1, offset, src, scratch2);
- }
-}
-
-
-void FullCodeGenerator::VisitDeclaration(Declaration* decl) {
- Comment cmnt(masm_, "[ Declaration");
- Variable* var = decl->proxy()->var();
- ASSERT(var != NULL); // Must have been resolved.
- Slot* slot = var->slot();
- Property* prop = var->AsProperty();
-
- if (slot != NULL) {
- switch (slot->type()) {
- case Slot::PARAMETER:
- case Slot::LOCAL:
- if (decl->mode() == Variable::CONST) {
- __ mov(Operand(ebp, SlotOffset(slot)),
- Immediate(Factory::the_hole_value()));
- } else if (decl->fun() != NULL) {
- VisitForValue(decl->fun(), kAccumulator);
- __ 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 context.
- ASSERT_EQ(0, function_->scope()->ContextChainLength(var->scope()));
- if (FLAG_debug_code) {
- // Check if we have the correct context pointer.
- __ mov(ebx,
- CodeGenerator::ContextOperand(esi, Context::FCONTEXT_INDEX));
- __ cmp(ebx, Operand(esi));
- __ Check(equal, "Unexpected declaration in current context.");
- }
- if (decl->mode() == Variable::CONST) {
- __ mov(eax, Immediate(Factory::the_hole_value()));
- __ mov(CodeGenerator::ContextOperand(esi, slot->index()), eax);
- // No write barrier since the hole value is in old space.
- } else if (decl->fun() != NULL) {
- VisitForValue(decl->fun(), kAccumulator);
- __ mov(CodeGenerator::ContextOperand(esi, slot->index()),
- result_register());
- int offset = Context::SlotOffset(slot->index());
- __ RecordWrite(esi, offset, result_register(), ecx);
- }
- break;
-
- case Slot::LOOKUP: {
- __ push(esi);
- __ push(Immediate(var->name()));
- // Declaration nodes are always introduced in one of two modes.
- ASSERT(decl->mode() == Variable::VAR ||
- decl->mode() == Variable::CONST);
- PropertyAttributes attr =
- (decl->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 (decl->mode() == Variable::CONST) {
- __ push(Immediate(Factory::the_hole_value()));
- } else if (decl->fun() != NULL) {
- VisitForValue(decl->fun(), kStack);
- } else {
- __ push(Immediate(Smi::FromInt(0))); // No initial value!
- }
- __ CallRuntime(Runtime::kDeclareContextSlot, 4);
- break;
- }
- }
-
- } else if (prop != NULL) {
- if (decl->fun() != NULL || decl->mode() == Variable::CONST) {
- // We are declaring a function or constant that rewrites to a
- // property. Use (keyed) IC to set the initial value.
- VisitForValue(prop->obj(), kStack);
- VisitForValue(prop->key(), kStack);
-
- if (decl->fun() != NULL) {
- VisitForValue(decl->fun(), kAccumulator);
- } else {
- __ mov(result_register(), Factory::the_hole_value());
- }
-
- Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- // Absence of a test eax instruction following the call
- // indicates that none of the load was inlined.
- __ nop();
-
- // Value in eax is ignored (declarations are statements). Receiver
- // and key on stack are discarded.
- __ Drop(2);
- }
- }
-}
-
-
-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)));
- __ CallRuntime(Runtime::kDeclareGlobals, 3);
- // Return value is ignored.
-}
-
-
-void FullCodeGenerator::VisitFunctionLiteral(FunctionLiteral* expr) {
- Comment cmnt(masm_, "[ FunctionLiteral");
-
- // Build the function boilerplate and instantiate it.
- Handle<JSFunction> boilerplate =
- Compiler::BuildBoilerplate(expr, script_, this);
- if (HasStackOverflow()) return;
-
- ASSERT(boilerplate->IsBoilerplate());
-
- // Create a new closure.
- __ push(esi);
- __ push(Immediate(boilerplate));
- __ CallRuntime(Runtime::kNewClosure, 2);
- Apply(context_, eax);
-}
-
-
-void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
- Comment cmnt(masm_, "[ VariableProxy");
- EmitVariableLoad(expr->var(), context_);
-}
-
-
-void FullCodeGenerator::EmitVariableLoad(Variable* var,
- Expression::Context context) {
- Expression* rewrite = var->rewrite();
- if (rewrite == NULL) {
- ASSERT(var->is_global());
- Comment cmnt(masm_, "Global variable");
- // Use inline caching. Variable name is passed in ecx and the global
- // object on the stack.
- __ push(CodeGenerator::GlobalObject());
- __ mov(ecx, var->name());
- Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET_CONTEXT);
- // By emitting a nop we make sure that we do not have a test eax
- // instruction after the call it is treated specially by the LoadIC code
- // Remember that the assembler may choose to do peephole optimization
- // (eg, push/pop elimination).
- __ nop();
- DropAndApply(1, context, eax);
- } else if (rewrite->AsSlot() != NULL) {
- Slot* slot = rewrite->AsSlot();
- if (FLAG_debug_code) {
- switch (slot->type()) {
- case Slot::PARAMETER:
- case Slot::LOCAL: {
- Comment cmnt(masm_, "Stack slot");
- break;
- }
- case Slot::CONTEXT: {
- Comment cmnt(masm_, "Context slot");
- break;
- }
- case Slot::LOOKUP:
- UNIMPLEMENTED();
- break;
- }
- }
- Apply(context, slot);
- } else {
- Comment cmnt(masm_, "Variable rewritten to property");
- // A variable has been rewritten into an explicit access to an object
- // property.
- Property* property = rewrite->AsProperty();
- ASSERT_NOT_NULL(property);
-
- // The only property expressions that can occur 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->slot();
- ASSERT_NOT_NULL(object_slot);
-
- // Load the object.
- MemOperand object_loc = EmitSlotSearch(object_slot, eax);
- __ push(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.
- __ push(Immediate(key_literal->handle()));
-
- // Do a keyed property load.
- Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- // Notice: We must not have a "test eax, ..." instruction after the
- // call. It is treated specially by the LoadIC code.
- __ nop();
- // Drop key and object left on the stack by IC.
- DropAndApply(2, context, eax);
- }
-}
-
-
-void FullCodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) {
- Comment cmnt(masm_, "[ RegExpLiteral");
- Label done;
- // Registers will be used as follows:
- // edi = JS function.
- // ebx = literals array.
- // eax = regexp literal.
- __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
- __ mov(ebx, FieldOperand(edi, JSFunction::kLiteralsOffset));
- int literal_offset =
- FixedArray::kHeaderSize + expr->literal_index() * kPointerSize;
- __ mov(eax, FieldOperand(ebx, literal_offset));
- __ cmp(eax, Factory::undefined_value());
- __ j(not_equal, &done);
- // Create regexp literal using runtime function
- // Result will be in eax.
- __ push(ebx);
- __ push(Immediate(Smi::FromInt(expr->literal_index())));
- __ push(Immediate(expr->pattern()));
- __ push(Immediate(expr->flags()));
- __ CallRuntime(Runtime::kMaterializeRegExpLiteral, 4);
- // Label done:
- __ bind(&done);
- Apply(context_, 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()));
- if (expr->depth() > 1) {
- __ CallRuntime(Runtime::kCreateObjectLiteral, 3);
- } else {
- __ CallRuntime(Runtime::kCreateObjectLiteralShallow, 3);
- }
-
- // 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;
-
- 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()) {
- VisitForValue(value, kAccumulator);
- __ mov(ecx, Immediate(key->handle()));
- Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- __ nop();
- // StoreIC leaves the receiver on the stack.
- break;
- }
- // Fall through.
- case ObjectLiteral::Property::PROTOTYPE:
- __ push(Operand(esp, 0)); // Duplicate receiver.
- VisitForValue(key, kStack);
- VisitForValue(value, kStack);
- __ CallRuntime(Runtime::kSetProperty, 3);
- break;
- case ObjectLiteral::Property::SETTER:
- case ObjectLiteral::Property::GETTER:
- __ push(Operand(esp, 0)); // Duplicate receiver.
- VisitForValue(key, kStack);
- __ push(Immediate(property->kind() == ObjectLiteral::Property::SETTER ?
- Smi::FromInt(1) :
- Smi::FromInt(0)));
- VisitForValue(value, kStack);
- __ CallRuntime(Runtime::kDefineAccessor, 4);
- break;
- default: UNREACHABLE();
- }
- }
-
- if (result_saved) {
- ApplyTOS(context_);
- } else {
- Apply(context_, eax);
- }
-}
-
-
-void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
- Comment cmnt(masm_, "[ ArrayLiteral");
- __ 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->depth() > 1) {
- __ CallRuntime(Runtime::kCreateArrayLiteral, 3);
- } else {
- __ CallRuntime(Runtime::kCreateArrayLiteralShallow, 3);
- }
-
- 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.
- ZoneList<Expression*>* subexprs = expr->values();
- for (int i = 0, len = subexprs->length(); i < len; 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;
- }
- VisitForValue(subexpr, kAccumulator);
-
- // 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);
- }
-
- if (result_saved) {
- ApplyTOS(context_);
- } else {
- Apply(context_, eax);
- }
-}
-
-
-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));
- __ call(ic, RelocInfo::CODE_TARGET);
- __ nop();
-}
-
-
-void FullCodeGenerator::EmitKeyedPropertyLoad(Property* prop) {
- SetSourcePosition(prop->position());
- Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- __ nop();
-}
-
-
-void FullCodeGenerator::EmitBinaryOp(Token::Value op,
- Expression::Context context) {
- __ push(result_register());
- GenericBinaryOpStub stub(op,
- NO_OVERWRITE,
- NO_GENERIC_BINARY_FLAGS);
- __ CallStub(&stub);
- Apply(context, eax);
-}
-
-
-void FullCodeGenerator::EmitVariableAssignment(Variable* var,
- Expression::Context context) {
- ASSERT(var != NULL);
- ASSERT(var->is_global() || var->slot() != NULL);
- if (var->is_global()) {
- // 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());
- __ push(CodeGenerator::GlobalObject());
- Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- __ nop();
- // Overwrite the receiver on the stack with the result if needed.
- DropAndApply(1, context, eax);
-
- } else if (var->slot() != NULL) {
- Slot* slot = var->slot();
- switch (slot->type()) {
- case Slot::LOCAL:
- case Slot::PARAMETER:
- __ mov(Operand(ebp, SlotOffset(slot)), result_register());
- break;
-
- case Slot::CONTEXT: {
- MemOperand target = EmitSlotSearch(slot, ecx);
- __ mov(target, result_register());
-
- // RecordWrite may destroy all its register arguments.
- __ mov(edx, result_register());
- int offset = FixedArray::kHeaderSize + slot->index() * kPointerSize;
- __ RecordWrite(ecx, offset, edx, ebx);
- break;
- }
-
- case Slot::LOOKUP:
- UNREACHABLE();
- break;
- }
- Apply(context, result_register());
-
- } else {
- // Variables rewritten as properties are not treated as variables in
- // assignments.
- UNREACHABLE();
- }
-}
-
-
-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());
- Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- __ nop();
-
- // 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);
- }
-
- DropAndApply(1, context_, 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());
- }
-
- // Record source code position before IC call.
- SetSourcePosition(expr->position());
- Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- // This nop signals to the IC that there is no inlined code at the call
- // site for it to patch.
- __ nop();
-
- // 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.
- // Receiver is under the key and value.
- __ push(Operand(esp, 2 * kPointerSize));
- __ CallRuntime(Runtime::kToFastProperties, 1);
- __ pop(eax);
- }
-
- // Receiver and key are still on stack.
- DropAndApply(2, context_, eax);
-}
-
-
-void FullCodeGenerator::VisitProperty(Property* expr) {
- Comment cmnt(masm_, "[ Property");
- Expression* key = expr->key();
-
- // Evaluate the receiver.
- VisitForValue(expr->obj(), kStack);
-
- if (key->IsPropertyName()) {
- EmitNamedPropertyLoad(expr);
- // Drop receiver left on the stack by IC.
- DropAndApply(1, context_, eax);
- } else {
- VisitForValue(expr->key(), kStack);
- EmitKeyedPropertyLoad(expr);
- // Drop key and receiver left on the stack by IC.
- DropAndApply(2, context_, 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();
- for (int i = 0; i < arg_count; i++) {
- VisitForValue(args->at(i), kStack);
- }
- __ 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 = CodeGenerator::ComputeCallInitialize(arg_count, in_loop);
- __ call(ic, mode);
- // Restore context register.
- __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
- Apply(context_, eax);
-}
-
-
-void FullCodeGenerator::EmitCallWithStub(Call* expr) {
- // Code common for calls using the call stub.
- ZoneList<Expression*>* args = expr->arguments();
- int arg_count = args->length();
- for (int i = 0; i < arg_count; i++) {
- VisitForValue(args->at(i), kStack);
- }
- // Record source position for debugger.
- SetSourcePosition(expr->position());
- CallFunctionStub stub(arg_count, NOT_IN_LOOP, RECEIVER_MIGHT_BE_VALUE);
- __ CallStub(&stub);
- // Restore context register.
- __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
- DropAndApply(1, context_, eax);
-}
-
-
-void FullCodeGenerator::VisitCall(Call* expr) {
- Comment cmnt(masm_, "[ Call");
- Expression* fun = expr->expression();
- Variable* var = fun->AsVariableProxy()->AsVariable();
-
- if (var != NULL && var->is_possibly_eval()) {
- // Call to the identifier 'eval'.
- UNREACHABLE();
- } else if (var != NULL && !var->is_this() && var->is_global()) {
- // Push global object as receiver for the call IC.
- __ push(CodeGenerator::GlobalObject());
- EmitCallWithIC(expr, var->name(), RelocInfo::CODE_TARGET_CONTEXT);
- } else if (var != NULL && var->slot() != NULL &&
- var->slot()->type() == Slot::LOOKUP) {
- // Call to a lookup slot.
- UNREACHABLE();
- } 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.
- VisitForValue(prop->obj(), kStack);
- EmitCallWithIC(expr, key->handle(), RelocInfo::CODE_TARGET);
- } else {
- // Call to a keyed property, use keyed load IC followed by function
- // call.
- VisitForValue(prop->obj(), kStack);
- VisitForValue(prop->key(), kStack);
- // Record source code position for IC call.
- SetSourcePosition(prop->position());
- Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- // By emitting a nop we make sure that we do not have a "test eax,..."
- // instruction after the call it is treated specially by the LoadIC code.
- __ nop();
- // Drop key left on the stack by IC.
- __ Drop(1);
- // Pop receiver.
- __ pop(ebx);
- // Push result (function).
- __ push(eax);
- // Push receiver object on stack.
- if (prop->is_synthetic()) {
- __ mov(ecx, CodeGenerator::GlobalObject());
- __ push(FieldOperand(ecx, GlobalObject::kGlobalReceiverOffset));
- } else {
- __ push(ebx);
- }
- EmitCallWithStub(expr);
- }
- } 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 fast code generator.
- FunctionLiteral* lit = fun->AsFunctionLiteral();
- if (lit != NULL &&
- lit->name()->Equals(Heap::empty_string()) &&
- loop_depth() == 0) {
- lit->set_try_fast_codegen(true);
- }
- VisitForValue(fun, kStack);
- // Load global receiver object.
- __ mov(ebx, CodeGenerator::GlobalObject());
- __ push(FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset));
- // Emit function call.
- EmitCallWithStub(expr);
- }
-}
-
-
-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 function on the stack.
- VisitForValue(expr->expression(), kStack);
-
- // Push global object (receiver).
- __ push(CodeGenerator::GlobalObject());
-
- // 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++) {
- VisitForValue(args->at(i), kStack);
- }
-
- // Call the construct call builtin that handles allocation and
- // constructor invocation.
- SetSourcePosition(expr->position());
-
- // Load function, arg_count into edi and eax.
- __ Set(eax, Immediate(arg_count));
- // Function is in esp[arg_count + 1].
- __ mov(edi, Operand(esp, eax, times_pointer_size, kPointerSize));
-
- Handle<Code> construct_builtin(Builtins::builtin(Builtins::JSConstructCall));
- __ call(construct_builtin, RelocInfo::CONSTRUCT_CALL);
-
- // Replace function on TOS with result in eax, or pop it.
- DropAndApply(1, context_, eax);
-}
-
-
-void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
- Comment cmnt(masm_, "[ CallRuntime");
- ZoneList<Expression*>* args = expr->arguments();
-
- if (expr->is_jsruntime()) {
- // Prepare for calling JS runtime function.
- __ mov(eax, CodeGenerator::GlobalObject());
- __ push(FieldOperand(eax, GlobalObject::kBuiltinsOffset));
- }
-
- // Push the arguments ("left-to-right").
- int arg_count = args->length();
- for (int i = 0; i < arg_count; i++) {
- VisitForValue(args->at(i), kStack);
- }
-
- 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 = CodeGenerator::ComputeCallInitialize(arg_count, in_loop);
- __ call(ic, RelocInfo::CODE_TARGET);
- // Restore context register.
- __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
- } else {
- // Call the C runtime function.
- __ CallRuntime(expr->function(), arg_count);
- }
- Apply(context_, eax);
-}
-
-
-void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
- switch (expr->op()) {
- case Token::VOID: {
- Comment cmnt(masm_, "[ UnaryOperation (VOID)");
- VisitForEffect(expr->expression());
- switch (context_) {
- case Expression::kUninitialized:
- UNREACHABLE();
- break;
- case Expression::kEffect:
- break;
- case Expression::kValue:
- switch (location_) {
- case kAccumulator:
- __ mov(result_register(), Factory::undefined_value());
- break;
- case kStack:
- __ push(Immediate(Factory::undefined_value()));
- break;
- }
- break;
- case Expression::kTestValue:
- // Value is false so it's needed.
- switch (location_) {
- case kAccumulator:
- __ mov(result_register(), Factory::undefined_value());
- break;
- case kStack:
- __ push(Immediate(Factory::undefined_value()));
- break;
- }
- // Fall through.
- case Expression::kTest:
- case Expression::kValueTest:
- __ jmp(false_label_);
- break;
- }
- break;
- }
-
- case Token::NOT: {
- Comment cmnt(masm_, "[ UnaryOperation (NOT)");
- Label materialize_true, materialize_false, done;
- // Initially assume a pure test context. Notice that the labels are
- // swapped.
- Label* if_true = false_label_;
- Label* if_false = true_label_;
- switch (context_) {
- case Expression::kUninitialized:
- UNREACHABLE();
- break;
- case Expression::kEffect:
- if_true = &done;
- if_false = &done;
- break;
- case Expression::kValue:
- if_true = &materialize_false;
- if_false = &materialize_true;
- break;
- case Expression::kTest:
- break;
- case Expression::kValueTest:
- if_false = &materialize_true;
- break;
- case Expression::kTestValue:
- if_true = &materialize_false;
- break;
- }
- VisitForControl(expr->expression(), if_true, if_false);
- Apply(context_, if_false, if_true); // Labels swapped.
- break;
- }
-
- case Token::TYPEOF: {
- Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)");
- VariableProxy* proxy = expr->expression()->AsVariableProxy();
- if (proxy != NULL &&
- !proxy->var()->is_this() &&
- proxy->var()->is_global()) {
- Comment cmnt(masm_, "Global variable");
- __ push(CodeGenerator::GlobalObject());
- __ 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.
- __ call(ic, RelocInfo::CODE_TARGET);
- __ mov(Operand(esp, 0), eax);
- } else if (proxy != NULL &&
- proxy->var()->slot() != NULL &&
- proxy->var()->slot()->type() == Slot::LOOKUP) {
- __ push(esi);
- __ push(Immediate(proxy->name()));
- __ CallRuntime(Runtime::kLoadContextSlotNoReferenceError, 2);
- __ push(eax);
- } else {
- // This expression cannot throw a reference error at the top level.
- VisitForValue(expr->expression(), kStack);
- }
-
- __ CallRuntime(Runtime::kTypeof, 1);
- Apply(context_, eax);
- break;
- }
-
- default:
- UNREACHABLE();
- }
-}
-
-
-void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
- Comment cmnt(masm_, "[ CountOperation");
-
- // 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);
- Location saved_location = location_;
- location_ = kStack;
- EmitVariableLoad(expr->expression()->AsVariableProxy()->var(),
- Expression::kValue);
- location_ = saved_location;
- } else {
- // Reserve space for result of postfix operation.
- if (expr->is_postfix() && context_ != Expression::kEffect) {
- __ push(Immediate(Smi::FromInt(0)));
- }
- VisitForValue(prop->obj(), kStack);
- if (assign_type == NAMED_PROPERTY) {
- EmitNamedPropertyLoad(prop);
- } else {
- VisitForValue(prop->key(), kStack);
- EmitKeyedPropertyLoad(prop);
- }
- __ push(eax);
- }
-
- // Convert to number.
- __ InvokeBuiltin(Builtins::TO_NUMBER, CALL_FUNCTION);
-
- // Save result for postfix expressions.
- if (expr->is_postfix()) {
- switch (context_) {
- case Expression::kUninitialized:
- UNREACHABLE();
- case Expression::kEffect:
- // Do not save result.
- break;
- case Expression::kValue:
- case Expression::kTest:
- case Expression::kValueTest:
- case Expression::kTestValue:
- // 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;
- }
- break;
- }
- }
-
- // Call stub for +1/-1.
- __ push(eax);
- __ push(Immediate(Smi::FromInt(1)));
- GenericBinaryOpStub stub(expr->binary_op(),
- NO_OVERWRITE,
- NO_GENERIC_BINARY_FLAGS);
- __ CallStub(&stub);
-
- // Store the value returned in eax.
- switch (assign_type) {
- case VARIABLE:
- if (expr->is_postfix()) {
- EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(),
- Expression::kEffect);
- // For all contexts except kEffect: We have the result on
- // top of the stack.
- if (context_ != Expression::kEffect) {
- ApplyTOS(context_);
- }
- } else {
- EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(),
- context_);
- }
- break;
- case NAMED_PROPERTY: {
- __ mov(ecx, prop->key()->AsLiteral()->handle());
- Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- // This nop signals to the IC that there is no inlined code at the call
- // site for it to patch.
- __ nop();
- if (expr->is_postfix()) {
- __ Drop(1); // Result is on the stack under the receiver.
- if (context_ != Expression::kEffect) {
- ApplyTOS(context_);
- }
- } else {
- DropAndApply(1, context_, eax);
- }
- break;
- }
- case KEYED_PROPERTY: {
- Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize));
- __ call(ic, RelocInfo::CODE_TARGET);
- // This nop signals to the IC that there is no inlined code at the call
- // site for it to patch.
- __ nop();
- if (expr->is_postfix()) {
- __ Drop(2); // Result is on the stack under the key and the receiver.
- if (context_ != Expression::kEffect) {
- ApplyTOS(context_);
- }
- } else {
- DropAndApply(2, context_, eax);
- }
- break;
- }
- }
-}
-
-
-void FullCodeGenerator::VisitBinaryOperation(BinaryOperation* expr) {
- Comment cmnt(masm_, "[ BinaryOperation");
- switch (expr->op()) {
- case Token::COMMA:
- VisitForEffect(expr->left());
- Visit(expr->right());
- break;
-
- case Token::OR:
- case Token::AND:
- EmitLogicalOperation(expr);
- break;
-
- case Token::ADD:
- case Token::SUB:
- case Token::DIV:
- case Token::MOD:
- case Token::MUL:
- case Token::BIT_OR:
- case Token::BIT_AND:
- case Token::BIT_XOR:
- case Token::SHL:
- case Token::SHR:
- case Token::SAR:
- VisitForValue(expr->left(), kStack);
- VisitForValue(expr->right(), kAccumulator);
- EmitBinaryOp(expr->op(), context_);
- break;
-
- default:
- UNREACHABLE();
- }
-}
-
-
-void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
- Comment cmnt(masm_, "[ CompareOperation");
-
- // 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, done;
- // Initially assume we are in a test context.
- Label* if_true = true_label_;
- Label* if_false = false_label_;
- switch (context_) {
- case Expression::kUninitialized:
- UNREACHABLE();
- break;
- case Expression::kEffect:
- if_true = &done;
- if_false = &done;
- break;
- case Expression::kValue:
- if_true = &materialize_true;
- if_false = &materialize_false;
- break;
- case Expression::kTest:
- break;
- case Expression::kValueTest:
- if_true = &materialize_true;
- break;
- case Expression::kTestValue:
- if_false = &materialize_false;
- break;
- }
-
- VisitForValue(expr->left(), kStack);
- switch (expr->op()) {
- case Token::IN:
- VisitForValue(expr->right(), kStack);
- __ InvokeBuiltin(Builtins::IN, CALL_FUNCTION);
- __ cmp(eax, Factory::true_value());
- __ j(equal, if_true);
- __ jmp(if_false);
- break;
-
- case Token::INSTANCEOF: {
- VisitForValue(expr->right(), kStack);
- InstanceofStub stub;
- __ CallStub(&stub);
- __ test(eax, Operand(eax));
- __ j(zero, if_true); // The stub returns 0 for true.
- __ jmp(if_false);
- break;
- }
-
- default: {
- VisitForValue(expr->right(), kAccumulator);
- Condition cc = no_condition;
- bool strict = false;
- switch (expr->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();
- }
-
- // The comparison stub expects the smi vs. smi case to be handled
- // before it is called.
- Label slow_case;
- __ mov(ecx, Operand(edx));
- __ or_(ecx, Operand(eax));
- __ test(ecx, Immediate(kSmiTagMask));
- __ j(not_zero, &slow_case, not_taken);
- __ cmp(edx, Operand(eax));
- __ j(cc, if_true);
- __ jmp(if_false);
-
- __ bind(&slow_case);
- CompareStub stub(cc, strict);
- __ CallStub(&stub);
- __ test(eax, Operand(eax));
- __ j(cc, if_true);
- __ jmp(if_false);
- }
- }
-
- // Convert the result of the comparison into one expected for this
- // expression's context.
- Apply(context_, if_true, if_false);
-}
-
-
-void FullCodeGenerator::VisitThisFunction(ThisFunction* expr) {
- __ mov(eax, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
- Apply(context_, eax);
-}
-
-
-Register FullCodeGenerator::result_register() { return eax; }
-
-
-Register FullCodeGenerator::context_register() { return esi; }
-
-
-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, CodeGenerator::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
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