d4d2277e2e
A few other tweaks. Review URL: http://codereview.chromium.org/435020 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3355 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
1558 lines
50 KiB
C++
1558 lines
50 KiB
C++
// Copyright 2009 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h"
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#include "codegen-inl.h"
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#include "compiler.h"
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#include "debug.h"
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#include "fast-codegen.h"
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#include "parser.h"
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namespace v8 {
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namespace internal {
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#define __ ACCESS_MASM(masm_)
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// Generate code for a JS function. On entry to the function the receiver
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// and arguments have been pushed on the stack left to right, with the
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// return address on top of them. The actual argument count matches the
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// formal parameter count expected by the function.
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//
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// The live registers are:
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// o rdi: the JS function object being called (ie, ourselves)
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// o rsi: our context
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// o rbp: our caller's frame pointer
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// o rsp: stack pointer (pointing to return address)
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//
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// The function builds a JS frame. Please see JavaScriptFrameConstants in
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// frames-x64.h for its layout.
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void FastCodeGenerator::Generate(FunctionLiteral* fun) {
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function_ = fun;
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SetFunctionPosition(fun);
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__ push(rbp); // Caller's frame pointer.
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__ movq(rbp, rsp);
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__ push(rsi); // Callee's context.
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__ push(rdi); // Callee's JS Function.
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{ Comment cmnt(masm_, "[ Allocate locals");
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int locals_count = fun->scope()->num_stack_slots();
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if (locals_count <= 1) {
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if (locals_count > 0) {
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__ PushRoot(Heap::kUndefinedValueRootIndex);
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}
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} else {
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__ LoadRoot(rdx, Heap::kUndefinedValueRootIndex);
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for (int i = 0; i < locals_count; i++) {
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__ push(rdx);
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}
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}
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}
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bool function_in_register = true;
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Variable* arguments = fun->scope()->arguments()->AsVariable();
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if (arguments != NULL) {
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// Function uses arguments object.
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Comment cmnt(masm_, "[ Allocate arguments object");
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__ push(rdi);
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// The receiver is just before the parameters on the caller's stack.
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__ lea(rdx, Operand(rbp, StandardFrameConstants::kCallerSPOffset +
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fun->num_parameters() * kPointerSize));
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__ push(rdx);
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__ Push(Smi::FromInt(fun->num_parameters()));
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// Arguments to ArgumentsAccessStub:
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// function, receiver address, parameter count.
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// The stub will rewrite receiver and parameter count if the previous
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// stack frame was an arguments adapter frame.
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ArgumentsAccessStub stub(ArgumentsAccessStub::NEW_OBJECT);
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__ CallStub(&stub);
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// Store new arguments object in both "arguments" and ".arguments" slots.
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__ movq(Operand(rbp, SlotOffset(arguments->slot())), rax);
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Slot* dot_arguments_slot =
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fun->scope()->arguments_shadow()->AsVariable()->slot();
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__ movq(Operand(rbp, SlotOffset(dot_arguments_slot)), rax);
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function_in_register = false;
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}
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// Possibly allocate a local context.
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if (fun->scope()->num_heap_slots() > 0) {
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Comment cmnt(masm_, "[ Allocate local context");
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if (function_in_register) {
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// Argument to NewContext is the function, still in rdi.
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__ push(rdi);
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} else {
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// Argument to NewContext is the function, no longer in rdi.
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__ push(Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
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}
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__ CallRuntime(Runtime::kNewContext, 1);
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// Context is returned in both rax and rsi. It replaces the context
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// passed to us. It's saved in the stack and kept live in rsi.
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__ movq(Operand(rbp, StandardFrameConstants::kContextOffset), rsi);
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#ifdef DEBUG
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// Assert we do not have to copy any parameters into the context.
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for (int i = 0, len = fun->scope()->num_parameters(); i < len; i++) {
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Slot* slot = fun->scope()->parameter(i)->slot();
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ASSERT(slot != NULL && slot->type() != Slot::CONTEXT);
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}
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#endif
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}
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{ Comment cmnt(masm_, "[ Stack check");
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Label ok;
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__ CompareRoot(rsp, Heap::kStackLimitRootIndex);
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__ j(above_equal, &ok);
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StackCheckStub stub;
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__ CallStub(&stub);
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__ bind(&ok);
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}
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{ Comment cmnt(masm_, "[ Declarations");
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VisitDeclarations(fun->scope()->declarations());
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}
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if (FLAG_trace) {
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__ CallRuntime(Runtime::kTraceEnter, 0);
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}
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{ Comment cmnt(masm_, "[ Body");
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ASSERT(loop_depth() == 0);
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VisitStatements(fun->body());
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ASSERT(loop_depth() == 0);
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}
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{ Comment cmnt(masm_, "[ return <undefined>;");
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// Emit a 'return undefined' in case control fell off the end of the body.
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__ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
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EmitReturnSequence(function_->end_position());
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}
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}
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void FastCodeGenerator::EmitReturnSequence(int position) {
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Comment cmnt(masm_, "[ Return sequence");
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if (return_label_.is_bound()) {
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__ jmp(&return_label_);
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} else {
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__ bind(&return_label_);
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if (FLAG_trace) {
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__ push(rax);
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__ CallRuntime(Runtime::kTraceExit, 1);
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}
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#ifdef DEBUG
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// Add a label for checking the size of the code used for returning.
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Label check_exit_codesize;
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masm_->bind(&check_exit_codesize);
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#endif
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CodeGenerator::RecordPositions(masm_, position);
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__ RecordJSReturn();
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// Do not use the leave instruction here because it is too short to
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// patch with the code required by the debugger.
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__ movq(rsp, rbp);
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__ pop(rbp);
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__ ret((function_->scope()->num_parameters() + 1) * kPointerSize);
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#ifdef ENABLE_DEBUGGER_SUPPORT
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// Add padding that will be overwritten by a debugger breakpoint. We
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// have just generated "movq rsp, rbp; pop rbp; ret k" with length 7
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// (3 + 1 + 3).
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const int kPadding = Debug::kX64JSReturnSequenceLength - 7;
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for (int i = 0; i < kPadding; ++i) {
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masm_->int3();
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}
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// Check that the size of the code used for returning matches what is
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// expected by the debugger.
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ASSERT_EQ(Debug::kX64JSReturnSequenceLength,
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masm_->SizeOfCodeGeneratedSince(&check_exit_codesize));
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#endif
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}
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}
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void FastCodeGenerator::Move(Expression::Context context, Register source) {
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switch (context) {
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case Expression::kUninitialized:
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UNREACHABLE();
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case Expression::kEffect:
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break;
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case Expression::kValue:
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__ push(source);
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break;
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case Expression::kTest:
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TestAndBranch(source, true_label_, false_label_);
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break;
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case Expression::kValueTest: {
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Label discard;
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__ push(source);
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TestAndBranch(source, true_label_, &discard);
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__ bind(&discard);
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__ addq(rsp, Immediate(kPointerSize));
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__ jmp(false_label_);
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break;
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}
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case Expression::kTestValue: {
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Label discard;
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__ push(source);
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TestAndBranch(source, &discard, false_label_);
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__ bind(&discard);
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__ addq(rsp, Immediate(kPointerSize));
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__ jmp(true_label_);
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break;
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}
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}
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}
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void FastCodeGenerator::Move(Expression::Context context, Slot* source) {
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switch (context) {
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case Expression::kUninitialized:
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UNREACHABLE();
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case Expression::kEffect:
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break;
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case Expression::kValue:
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__ push(Operand(rbp, SlotOffset(source)));
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break;
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case Expression::kTest: // Fall through.
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case Expression::kValueTest: // Fall through.
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case Expression::kTestValue:
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__ movq(rax, Operand(rbp, SlotOffset(source)));
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Move(context, rax);
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break;
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}
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}
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void FastCodeGenerator::Move(Expression::Context context, Literal* expr) {
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switch (context) {
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case Expression::kUninitialized:
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UNREACHABLE();
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case Expression::kEffect:
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break;
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case Expression::kValue:
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__ Push(expr->handle());
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break;
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case Expression::kTest: // Fall through.
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case Expression::kValueTest: // Fall through.
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case Expression::kTestValue:
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__ Move(rax, expr->handle());
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Move(context, rax);
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break;
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}
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}
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void FastCodeGenerator::DropAndMove(Expression::Context context,
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Register source) {
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switch (context) {
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case Expression::kUninitialized:
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UNREACHABLE();
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case Expression::kEffect:
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__ addq(rsp, Immediate(kPointerSize));
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break;
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case Expression::kValue:
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__ movq(Operand(rsp, 0), source);
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break;
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case Expression::kTest:
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ASSERT(!source.is(rsp));
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__ addq(rsp, Immediate(kPointerSize));
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TestAndBranch(source, true_label_, false_label_);
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break;
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case Expression::kValueTest: {
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Label discard;
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__ movq(Operand(rsp, 0), source);
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TestAndBranch(source, true_label_, &discard);
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__ bind(&discard);
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__ addq(rsp, Immediate(kPointerSize));
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__ jmp(false_label_);
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break;
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}
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case Expression::kTestValue: {
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Label discard;
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__ movq(Operand(rsp, 0), source);
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TestAndBranch(source, &discard, false_label_);
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__ bind(&discard);
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__ addq(rsp, Immediate(kPointerSize));
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__ jmp(true_label_);
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break;
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}
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}
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}
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void FastCodeGenerator::TestAndBranch(Register source,
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Label* true_label,
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Label* false_label) {
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ASSERT_NE(NULL, true_label);
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ASSERT_NE(NULL, false_label);
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// Use the shared ToBoolean stub to compile the value in the register into
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// control flow to the code generator's true and false labels. Perform
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// the fast checks assumed by the stub.
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// The undefined value is false.
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__ CompareRoot(source, Heap::kUndefinedValueRootIndex);
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__ j(equal, false_label);
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__ CompareRoot(source, Heap::kTrueValueRootIndex); // True is true.
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__ j(equal, true_label);
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__ CompareRoot(source, Heap::kFalseValueRootIndex); // False is false.
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__ j(equal, false_label);
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ASSERT_EQ(0, kSmiTag);
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__ SmiCompare(source, Smi::FromInt(0)); // The smi zero is false.
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__ j(equal, false_label);
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Condition is_smi = masm_->CheckSmi(source); // All other smis are true.
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__ j(is_smi, true_label);
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// Call the stub for all other cases.
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__ push(source);
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ToBooleanStub stub;
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__ CallStub(&stub);
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__ testq(rax, rax); // The stub returns nonzero for true.
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__ j(not_zero, true_label);
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__ jmp(false_label);
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}
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void FastCodeGenerator::VisitDeclaration(Declaration* decl) {
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Comment cmnt(masm_, "[ Declaration");
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Variable* var = decl->proxy()->var();
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ASSERT(var != NULL); // Must have been resolved.
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Slot* slot = var->slot();
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ASSERT(slot != NULL); // No global declarations here.
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// We have 3 cases for slots: LOOKUP, LOCAL, CONTEXT.
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switch (slot->type()) {
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case Slot::LOOKUP: {
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__ push(rsi);
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__ Push(var->name());
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// Declaration nodes are always introduced in one of two modes.
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ASSERT(decl->mode() == Variable::VAR || decl->mode() == Variable::CONST);
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PropertyAttributes attr = decl->mode() == Variable::VAR ?
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NONE : READ_ONLY;
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__ Push(Smi::FromInt(attr));
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// Push initial value, if any.
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// Note: For variables we must not push an initial value (such as
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// 'undefined') because we may have a (legal) redeclaration and we
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// must not destroy the current value.
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if (decl->mode() == Variable::CONST) {
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__ Push(Factory::the_hole_value());
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} else if (decl->fun() != NULL) {
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Visit(decl->fun());
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} else {
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__ Push(Smi::FromInt(0)); // no initial value!
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}
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__ CallRuntime(Runtime::kDeclareContextSlot, 4);
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break;
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}
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case Slot::LOCAL:
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if (decl->mode() == Variable::CONST) {
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__ Move(Operand(rbp, SlotOffset(var->slot())),
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Factory::the_hole_value());
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} else if (decl->fun() != NULL) {
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Visit(decl->fun());
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__ pop(Operand(rbp, SlotOffset(var->slot())));
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}
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break;
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case Slot::CONTEXT:
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// The variable in the decl always resides in the current context.
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ASSERT(function_->scope()->ContextChainLength(slot->var()->scope()) == 0);
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if (decl->mode() == Variable::CONST) {
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__ Move(rax, Factory::the_hole_value());
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if (FLAG_debug_code) {
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// Check if we have the correct context pointer.
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__ movq(rbx, CodeGenerator::ContextOperand(rsi,
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Context::FCONTEXT_INDEX));
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__ cmpq(rbx, rsi);
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__ Check(equal, "Unexpected declaration in current context.");
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}
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__ movq(CodeGenerator::ContextOperand(rsi, slot->index()), rax);
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// No write barrier since the_hole_value is in old space.
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ASSERT(!Heap::InNewSpace(*Factory::the_hole_value()));
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} else if (decl->fun() != NULL) {
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Visit(decl->fun());
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__ pop(rax);
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if (FLAG_debug_code) {
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// Check if we have the correct context pointer.
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__ movq(rbx, CodeGenerator::ContextOperand(rsi,
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Context::FCONTEXT_INDEX));
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__ cmpq(rbx, rsi);
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__ Check(equal, "Unexpected declaration in current context.");
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}
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__ movq(CodeGenerator::ContextOperand(rsi, slot->index()), rax);
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int offset = Context::SlotOffset(slot->index());
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__ RecordWrite(rsi, offset, rax, rcx);
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}
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break;
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default:
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UNREACHABLE();
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}
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}
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void FastCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) {
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// Call the runtime to declare the globals.
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__ push(rsi); // The context is the first argument.
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__ Push(pairs);
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__ Push(Smi::FromInt(is_eval_ ? 1 : 0));
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__ CallRuntime(Runtime::kDeclareGlobals, 3);
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// Return value is ignored.
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}
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void FastCodeGenerator::VisitReturnStatement(ReturnStatement* stmt) {
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Comment cmnt(masm_, "[ ReturnStatement");
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Expression* expr = stmt->expression();
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if (expr->AsLiteral() != NULL) {
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__ Move(rax, expr->AsLiteral()->handle());
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} else {
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Visit(expr);
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ASSERT_EQ(Expression::kValue, expr->context());
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__ pop(rax);
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}
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EmitReturnSequence(stmt->statement_pos());
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}
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void FastCodeGenerator::VisitFunctionLiteral(FunctionLiteral* expr) {
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Comment cmnt(masm_, "[ FunctionLiteral");
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// Build the function boilerplate and instantiate it.
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Handle<JSFunction> boilerplate =
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Compiler::BuildBoilerplate(expr, script_, this);
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if (HasStackOverflow()) return;
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ASSERT(boilerplate->IsBoilerplate());
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// Create a new closure.
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__ push(rsi);
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__ Push(boilerplate);
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__ CallRuntime(Runtime::kNewClosure, 2);
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Move(expr->context(), rax);
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}
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void FastCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
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Comment cmnt(masm_, "[ VariableProxy");
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Expression* rewrite = expr->var()->rewrite();
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if (rewrite == NULL) {
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ASSERT(expr->var()->is_global());
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Comment cmnt(masm_, "Global variable");
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// Use inline caching. Variable name is passed in rcx and the global
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// object on the stack.
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__ push(CodeGenerator::GlobalObject());
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__ Move(rcx, expr->name());
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Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize));
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__ Call(ic, RelocInfo::CODE_TARGET_CONTEXT);
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// A test rax instruction following the call is used by the IC to
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// indicate that the inobject property case was inlined. Ensure there
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// is no test rax instruction here.
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__ nop();
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DropAndMove(expr->context(), rax);
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} else if (rewrite->AsSlot() != NULL) {
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Slot* slot = rewrite->AsSlot();
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switch (slot->type()) {
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case Slot::LOCAL:
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case Slot::PARAMETER: {
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Comment cmnt(masm_, "Stack slot");
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Move(expr->context(), slot);
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break;
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}
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case Slot::CONTEXT: {
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Comment cmnt(masm_, "Context slot");
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int chain_length =
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function_->scope()->ContextChainLength(slot->var()->scope());
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if (chain_length > 0) {
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// Move up the chain of contexts to the context containing the slot.
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__ movq(rax,
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Operand(rsi, Context::SlotOffset(Context::CLOSURE_INDEX)));
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// Load the function context (which is the incoming, outer context).
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__ movq(rax, FieldOperand(rax, JSFunction::kContextOffset));
|
|
for (int i = 1; i < chain_length; i++) {
|
|
__ movq(rax,
|
|
Operand(rax, Context::SlotOffset(Context::CLOSURE_INDEX)));
|
|
__ movq(rax, FieldOperand(rax, JSFunction::kContextOffset));
|
|
}
|
|
// The context may be an intermediate context, not a function context.
|
|
__ movq(rax,
|
|
Operand(rax, Context::SlotOffset(Context::FCONTEXT_INDEX)));
|
|
} else { // Slot is in the current function context.
|
|
// The context may be an intermediate context, not a function context.
|
|
__ movq(rax,
|
|
Operand(rsi, Context::SlotOffset(Context::FCONTEXT_INDEX)));
|
|
}
|
|
__ movq(rax, Operand(rax, Context::SlotOffset(slot->index())));
|
|
Move(expr->context(), rax);
|
|
break;
|
|
}
|
|
|
|
case Slot::LOOKUP:
|
|
UNREACHABLE();
|
|
break;
|
|
}
|
|
} else {
|
|
// The parameter variable has been rewritten into an explict access to
|
|
// the arguments object.
|
|
Property* property = rewrite->AsProperty();
|
|
ASSERT_NOT_NULL(property);
|
|
ASSERT_EQ(expr->context(), property->context());
|
|
Visit(property);
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) {
|
|
Comment cmnt(masm_, "[ RegExpLiteral");
|
|
Label done;
|
|
// Registers will be used as follows:
|
|
// rdi = JS function.
|
|
// rbx = literals array.
|
|
// rax = regexp literal.
|
|
__ movq(rdi, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
|
|
__ movq(rbx, FieldOperand(rdi, JSFunction::kLiteralsOffset));
|
|
int literal_offset =
|
|
FixedArray::kHeaderSize + expr->literal_index() * kPointerSize;
|
|
__ movq(rax, FieldOperand(rbx, literal_offset));
|
|
__ CompareRoot(rax, Heap::kUndefinedValueRootIndex);
|
|
__ j(not_equal, &done);
|
|
// Create regexp literal using runtime function
|
|
// Result will be in rax.
|
|
__ push(rbx);
|
|
__ Push(Smi::FromInt(expr->literal_index()));
|
|
__ Push(expr->pattern());
|
|
__ Push(expr->flags());
|
|
__ CallRuntime(Runtime::kMaterializeRegExpLiteral, 4);
|
|
// Label done:
|
|
__ bind(&done);
|
|
Move(expr->context(), rax);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
|
|
Comment cmnt(masm_, "[ ObjectLiteral");
|
|
Label boilerplate_exists;
|
|
|
|
__ movq(rdi, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
|
|
__ movq(rbx, FieldOperand(rdi, JSFunction::kLiteralsOffset));
|
|
int literal_offset =
|
|
FixedArray::kHeaderSize + expr->literal_index() * kPointerSize;
|
|
__ movq(rax, FieldOperand(rbx, literal_offset));
|
|
__ CompareRoot(rax, Heap::kUndefinedValueRootIndex);
|
|
__ j(not_equal, &boilerplate_exists);
|
|
// Create boilerplate if it does not exist.
|
|
// Literal array (0).
|
|
__ push(rbx);
|
|
// Literal index (1).
|
|
__ Push(Smi::FromInt(expr->literal_index()));
|
|
// Constant properties (2).
|
|
__ Push(expr->constant_properties());
|
|
__ CallRuntime(Runtime::kCreateObjectLiteralBoilerplate, 3);
|
|
__ bind(&boilerplate_exists);
|
|
// rax contains boilerplate.
|
|
// Clone boilerplate.
|
|
__ push(rax);
|
|
if (expr->depth() == 1) {
|
|
__ CallRuntime(Runtime::kCloneShallowLiteralBoilerplate, 1);
|
|
} else {
|
|
__ CallRuntime(Runtime::kCloneLiteralBoilerplate, 1);
|
|
}
|
|
|
|
// If result_saved == true: the result is saved on top of the stack.
|
|
// If result_saved == false: the result is not on the stack, just in rax.
|
|
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(rax); // Save result on the stack
|
|
result_saved = true;
|
|
}
|
|
switch (property->kind()) {
|
|
case ObjectLiteral::Property::MATERIALIZED_LITERAL: // fall through
|
|
ASSERT(!CompileTimeValue::IsCompileTimeValue(value));
|
|
case ObjectLiteral::Property::COMPUTED:
|
|
if (key->handle()->IsSymbol()) {
|
|
Visit(value);
|
|
ASSERT_EQ(Expression::kValue, value->context());
|
|
__ pop(rax);
|
|
__ Move(rcx, key->handle());
|
|
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
|
|
__ call(ic, RelocInfo::CODE_TARGET);
|
|
// StoreIC leaves the receiver on the stack.
|
|
break;
|
|
}
|
|
// fall through
|
|
case ObjectLiteral::Property::PROTOTYPE:
|
|
__ push(rax);
|
|
Visit(key);
|
|
ASSERT_EQ(Expression::kValue, key->context());
|
|
Visit(value);
|
|
ASSERT_EQ(Expression::kValue, value->context());
|
|
__ CallRuntime(Runtime::kSetProperty, 3);
|
|
__ movq(rax, Operand(rsp, 0)); // Restore result into rax.
|
|
break;
|
|
case ObjectLiteral::Property::SETTER: // fall through
|
|
case ObjectLiteral::Property::GETTER:
|
|
__ push(rax);
|
|
Visit(key);
|
|
ASSERT_EQ(Expression::kValue, key->context());
|
|
__ Push(property->kind() == ObjectLiteral::Property::SETTER ?
|
|
Smi::FromInt(1) :
|
|
Smi::FromInt(0));
|
|
Visit(value);
|
|
ASSERT_EQ(Expression::kValue, value->context());
|
|
__ CallRuntime(Runtime::kDefineAccessor, 4);
|
|
__ movq(rax, Operand(rsp, 0)); // Restore result into rax.
|
|
break;
|
|
default: UNREACHABLE();
|
|
}
|
|
}
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
case Expression::kEffect:
|
|
if (result_saved) __ addq(rsp, Immediate(kPointerSize));
|
|
break;
|
|
case Expression::kValue:
|
|
if (!result_saved) __ push(rax);
|
|
break;
|
|
case Expression::kTest:
|
|
if (result_saved) __ pop(rax);
|
|
TestAndBranch(rax, true_label_, false_label_);
|
|
break;
|
|
case Expression::kValueTest: {
|
|
Label discard;
|
|
if (!result_saved) __ push(rax);
|
|
TestAndBranch(rax, true_label_, &discard);
|
|
__ bind(&discard);
|
|
__ addq(rsp, Immediate(kPointerSize));
|
|
__ jmp(false_label_);
|
|
break;
|
|
}
|
|
case Expression::kTestValue: {
|
|
Label discard;
|
|
if (!result_saved) __ push(rax);
|
|
TestAndBranch(rax, &discard, false_label_);
|
|
__ bind(&discard);
|
|
__ addq(rsp, Immediate(kPointerSize));
|
|
__ jmp(true_label_);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
|
|
Comment cmnt(masm_, "[ ArrayLiteral");
|
|
Label make_clone;
|
|
|
|
// Fetch the function's literals array.
|
|
__ movq(rbx, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
|
|
__ movq(rbx, FieldOperand(rbx, JSFunction::kLiteralsOffset));
|
|
// Check if the literal's boilerplate has been instantiated.
|
|
int offset =
|
|
FixedArray::kHeaderSize + (expr->literal_index() * kPointerSize);
|
|
__ movq(rax, FieldOperand(rbx, offset));
|
|
__ CompareRoot(rax, Heap::kUndefinedValueRootIndex);
|
|
__ j(not_equal, &make_clone);
|
|
|
|
// Instantiate the boilerplate.
|
|
__ push(rbx);
|
|
__ Push(Smi::FromInt(expr->literal_index()));
|
|
__ Push(expr->literals());
|
|
__ CallRuntime(Runtime::kCreateArrayLiteralBoilerplate, 3);
|
|
|
|
__ bind(&make_clone);
|
|
// Clone the boilerplate.
|
|
__ push(rax);
|
|
if (expr->depth() > 1) {
|
|
__ CallRuntime(Runtime::kCloneLiteralBoilerplate, 1);
|
|
} else {
|
|
__ CallRuntime(Runtime::kCloneShallowLiteralBoilerplate, 1);
|
|
}
|
|
|
|
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(rax);
|
|
result_saved = true;
|
|
}
|
|
Visit(subexpr);
|
|
ASSERT_EQ(Expression::kValue, subexpr->context());
|
|
|
|
// Store the subexpression value in the array's elements.
|
|
__ pop(rax); // Subexpression value.
|
|
__ movq(rbx, Operand(rsp, 0)); // Copy of array literal.
|
|
__ movq(rbx, FieldOperand(rbx, JSObject::kElementsOffset));
|
|
int offset = FixedArray::kHeaderSize + (i * kPointerSize);
|
|
__ movq(FieldOperand(rbx, offset), rax);
|
|
|
|
// Update the write barrier for the array store.
|
|
__ RecordWrite(rbx, offset, rax, rcx);
|
|
}
|
|
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
case Expression::kEffect:
|
|
if (result_saved) __ addq(rsp, Immediate(kPointerSize));
|
|
break;
|
|
case Expression::kValue:
|
|
if (!result_saved) __ push(rax);
|
|
break;
|
|
case Expression::kTest:
|
|
if (result_saved) __ pop(rax);
|
|
TestAndBranch(rax, true_label_, false_label_);
|
|
break;
|
|
case Expression::kValueTest: {
|
|
Label discard;
|
|
if (!result_saved) __ push(rax);
|
|
TestAndBranch(rax, true_label_, &discard);
|
|
__ bind(&discard);
|
|
__ addq(rsp, Immediate(kPointerSize));
|
|
__ jmp(false_label_);
|
|
break;
|
|
}
|
|
case Expression::kTestValue: {
|
|
Label discard;
|
|
if (!result_saved) __ push(rax);
|
|
TestAndBranch(rax, &discard, false_label_);
|
|
__ bind(&discard);
|
|
__ addq(rsp, Immediate(kPointerSize));
|
|
__ jmp(true_label_);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::EmitVariableAssignment(Assignment* expr) {
|
|
Variable* var = expr->target()->AsVariableProxy()->AsVariable();
|
|
ASSERT(var != NULL);
|
|
|
|
if (var->is_global()) {
|
|
// Assignment to a global variable. Use inline caching for the
|
|
// assignment. Right-hand-side value is passed in rax, variable name in
|
|
// rcx, and the global object on the stack.
|
|
__ pop(rax);
|
|
__ Move(rcx, var->name());
|
|
__ push(CodeGenerator::GlobalObject());
|
|
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
|
|
__ Call(ic, RelocInfo::CODE_TARGET);
|
|
// Overwrite the global object on the stack with the result if needed.
|
|
DropAndMove(expr->context(), rax);
|
|
|
|
} else {
|
|
Slot* slot = var->slot();
|
|
ASSERT_NOT_NULL(slot); // Variables rewritten as properties not handled.
|
|
switch (slot->type()) {
|
|
case Slot::LOCAL:
|
|
case Slot::PARAMETER: {
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
case Expression::kEffect:
|
|
// Perform assignment and discard value.
|
|
__ pop(Operand(rbp, SlotOffset(var->slot())));
|
|
break;
|
|
case Expression::kValue:
|
|
// Perform assignment and preserve value.
|
|
__ movq(rax, Operand(rsp, 0));
|
|
__ movq(Operand(rbp, SlotOffset(var->slot())), rax);
|
|
break;
|
|
case Expression::kTest:
|
|
// Perform assignment and test (and discard) value.
|
|
__ pop(rax);
|
|
__ movq(Operand(rbp, SlotOffset(var->slot())), rax);
|
|
TestAndBranch(rax, true_label_, false_label_);
|
|
break;
|
|
case Expression::kValueTest: {
|
|
Label discard;
|
|
__ movq(rax, Operand(rsp, 0));
|
|
__ movq(Operand(rbp, SlotOffset(var->slot())), rax);
|
|
TestAndBranch(rax, true_label_, &discard);
|
|
__ bind(&discard);
|
|
__ addq(rsp, Immediate(kPointerSize));
|
|
__ jmp(false_label_);
|
|
break;
|
|
}
|
|
case Expression::kTestValue: {
|
|
Label discard;
|
|
__ movq(rax, Operand(rsp, 0));
|
|
__ movq(Operand(rbp, SlotOffset(var->slot())), rax);
|
|
TestAndBranch(rax, &discard, false_label_);
|
|
__ bind(&discard);
|
|
__ addq(rsp, Immediate(kPointerSize));
|
|
__ jmp(true_label_);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
case Slot::CONTEXT: {
|
|
int chain_length =
|
|
function_->scope()->ContextChainLength(slot->var()->scope());
|
|
if (chain_length > 0) {
|
|
// Move up the context chain to the context containing the slot.
|
|
__ movq(rax,
|
|
Operand(rsi, Context::SlotOffset(Context::CLOSURE_INDEX)));
|
|
// Load the function context (which is the incoming, outer context).
|
|
__ movq(rax, FieldOperand(rax, JSFunction::kContextOffset));
|
|
for (int i = 1; i < chain_length; i++) {
|
|
__ movq(rax,
|
|
Operand(rax, Context::SlotOffset(Context::CLOSURE_INDEX)));
|
|
__ movq(rax, FieldOperand(rax, JSFunction::kContextOffset));
|
|
}
|
|
} else { // Slot is in the current context. Generate optimized code.
|
|
__ movq(rax, rsi); // RecordWrite destroys the object register.
|
|
}
|
|
if (FLAG_debug_code) {
|
|
__ cmpq(rax,
|
|
Operand(rax, Context::SlotOffset(Context::FCONTEXT_INDEX)));
|
|
__ Check(equal, "Context Slot chain length wrong.");
|
|
}
|
|
__ pop(rcx);
|
|
__ movq(Operand(rax, Context::SlotOffset(slot->index())), rcx);
|
|
|
|
// RecordWrite may destroy all its register arguments.
|
|
if (expr->context() == Expression::kValue) {
|
|
__ push(rcx);
|
|
} else if (expr->context() != Expression::kEffect) {
|
|
__ movq(rdx, rcx);
|
|
}
|
|
int offset = FixedArray::kHeaderSize + slot->index() * kPointerSize;
|
|
__ RecordWrite(rax, offset, rcx, rbx);
|
|
if (expr->context() != Expression::kEffect &&
|
|
expr->context() != Expression::kValue) {
|
|
Move(expr->context(), rdx);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case Slot::LOOKUP:
|
|
UNREACHABLE();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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(Operand(rsp, kPointerSize)); // Receiver is under value.
|
|
__ CallRuntime(Runtime::kToSlowProperties, 1);
|
|
}
|
|
|
|
__ pop(rax);
|
|
__ Move(rcx, prop->key()->AsLiteral()->handle());
|
|
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
|
|
__ Call(ic, RelocInfo::CODE_TARGET);
|
|
|
|
// If the assignment ends an initialization block, revert to fast case.
|
|
if (expr->ends_initialization_block()) {
|
|
__ push(rax); // Result of assignment, saved even if not needed.
|
|
__ push(Operand(rsp, kPointerSize)); // Receiver is under value.
|
|
__ CallRuntime(Runtime::kToFastProperties, 1);
|
|
__ pop(rax);
|
|
}
|
|
|
|
DropAndMove(expr->context(), rax);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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()) {
|
|
// Reciever is under the key and value.
|
|
__ push(Operand(rsp, 2 * kPointerSize));
|
|
__ CallRuntime(Runtime::kToSlowProperties, 1);
|
|
}
|
|
|
|
__ pop(rax);
|
|
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(rax); // Result of assignment, saved even if not needed.
|
|
// Reciever is under the key and value.
|
|
__ push(Operand(rsp, 2 * kPointerSize));
|
|
__ CallRuntime(Runtime::kToFastProperties, 1);
|
|
__ pop(rax);
|
|
}
|
|
|
|
// Receiver and key are still on stack.
|
|
__ addq(rsp, Immediate(2 * kPointerSize));
|
|
Move(expr->context(), rax);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::VisitProperty(Property* expr) {
|
|
Comment cmnt(masm_, "[ Property");
|
|
Expression* key = expr->key();
|
|
uint32_t dummy;
|
|
|
|
// Record the source position for the property load.
|
|
SetSourcePosition(expr->position());
|
|
|
|
// Evaluate receiver.
|
|
Visit(expr->obj());
|
|
|
|
|
|
if (key->AsLiteral() != NULL && key->AsLiteral()->handle()->IsSymbol() &&
|
|
!String::cast(*(key->AsLiteral()->handle()))->AsArrayIndex(&dummy)) {
|
|
// Do a NAMED property load.
|
|
// The IC expects the property name in rcx and the receiver on the stack.
|
|
__ Move(rcx, key->AsLiteral()->handle());
|
|
Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize));
|
|
__ call(ic, RelocInfo::CODE_TARGET);
|
|
// By emitting a nop we make sure that we do not have a "test rax,..."
|
|
// instruction after the call it is treated specially by the LoadIC code.
|
|
__ nop();
|
|
} else {
|
|
// Do a KEYED property load.
|
|
Visit(expr->key());
|
|
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 rax,..."
|
|
// instruction after the call it is treated specially by the LoadIC code.
|
|
__ nop();
|
|
// Drop key left on the stack by IC.
|
|
__ addq(rsp, Immediate(kPointerSize));
|
|
}
|
|
DropAndMove(expr->context(), rax);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::EmitCallWithIC(Call* expr, RelocInfo::Mode reloc_info) {
|
|
// 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++) {
|
|
Visit(args->at(i));
|
|
ASSERT_EQ(Expression::kValue, args->at(i)->context());
|
|
}
|
|
// Record source position for debugger.
|
|
SetSourcePosition(expr->position());
|
|
// Call the IC initialization code.
|
|
Handle<Code> ic = CodeGenerator::ComputeCallInitialize(arg_count,
|
|
NOT_IN_LOOP);
|
|
__ call(ic, reloc_info);
|
|
// Restore context register.
|
|
__ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
|
|
// Discard the function left on TOS.
|
|
DropAndMove(expr->context(), rax);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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++) {
|
|
Visit(args->at(i));
|
|
}
|
|
// Record source position for debugger.
|
|
SetSourcePosition(expr->position());
|
|
CallFunctionStub stub(arg_count, NOT_IN_LOOP);
|
|
__ CallStub(&stub);
|
|
// Restore context register.
|
|
__ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
|
|
// Discard the function left on TOS.
|
|
DropAndMove(expr->context(), rax);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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()) {
|
|
// Call to a global variable.
|
|
__ Push(var->name());
|
|
// Push global object as receiver for the call IC lookup.
|
|
__ push(CodeGenerator::GlobalObject());
|
|
EmitCallWithIC(expr, 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.
|
|
__ Push(key->handle());
|
|
Visit(prop->obj());
|
|
EmitCallWithIC(expr, RelocInfo::CODE_TARGET);
|
|
} else {
|
|
// Call to a keyed property, use keyed load IC followed by function
|
|
// call.
|
|
Visit(prop->obj());
|
|
Visit(prop->key());
|
|
// 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.
|
|
__ addq(rsp, Immediate(kPointerSize));
|
|
// Pop receiver.
|
|
__ pop(rbx);
|
|
// Push result (function).
|
|
__ push(rax);
|
|
// Push receiver object on stack.
|
|
if (prop->is_synthetic()) {
|
|
__ push(CodeGenerator::GlobalObject());
|
|
} else {
|
|
__ push(rbx);
|
|
}
|
|
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);
|
|
}
|
|
Visit(fun);
|
|
// Load global receiver object.
|
|
__ movq(rbx, CodeGenerator::GlobalObject());
|
|
__ push(FieldOperand(rbx, GlobalObject::kGlobalReceiverOffset));
|
|
// Emit function call.
|
|
EmitCallWithStub(expr);
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::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.
|
|
Visit(expr->expression());
|
|
ASSERT_EQ(Expression::kValue, expr->expression()->context());
|
|
// If location is value, already on the stack,
|
|
|
|
// 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++) {
|
|
Visit(args->at(i));
|
|
ASSERT_EQ(Expression::kValue, args->at(i)->context());
|
|
// If location is value, it is already on the stack,
|
|
// so nothing to do here.
|
|
}
|
|
|
|
// Call the construct call builtin that handles allocation and
|
|
// constructor invocation.
|
|
SetSourcePosition(expr->position());
|
|
|
|
// Load function, arg_count into rdi and rax.
|
|
__ Set(rax, arg_count);
|
|
// Function is in rsp[arg_count + 1].
|
|
__ movq(rdi, Operand(rsp, rax, 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 rax, or pop it.
|
|
DropAndMove(expr->context(), rax);
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
|
|
Comment cmnt(masm_, "[ CallRuntime");
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
Runtime::Function* function = expr->function();
|
|
|
|
ASSERT(function != NULL);
|
|
|
|
// Push the arguments ("left-to-right").
|
|
int arg_count = args->length();
|
|
for (int i = 0; i < arg_count; i++) {
|
|
Visit(args->at(i));
|
|
ASSERT_EQ(Expression::kValue, args->at(i)->context());
|
|
}
|
|
|
|
__ CallRuntime(function, arg_count);
|
|
Move(expr->context(), rax);
|
|
}
|
|
|
|
void FastCodeGenerator::VisitCountOperation(CountOperation* expr) {
|
|
Comment cmnt(masm_, "[ CountOperation");
|
|
VariableProxy* proxy = expr->expression()->AsVariableProxy();
|
|
ASSERT(proxy->AsVariable() != NULL);
|
|
ASSERT(proxy->AsVariable()->is_global());
|
|
|
|
Visit(proxy);
|
|
__ InvokeBuiltin(Builtins::TO_NUMBER, CALL_FUNCTION);
|
|
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
case Expression::kValue: // Fall through
|
|
case Expression::kTest: // Fall through
|
|
case Expression::kTestValue: // Fall through
|
|
case Expression::kValueTest:
|
|
// Duplicate the result on the stack.
|
|
__ push(rax);
|
|
break;
|
|
case Expression::kEffect:
|
|
// Do not save result.
|
|
break;
|
|
}
|
|
// Call runtime for +1/-1.
|
|
__ push(rax);
|
|
__ Push(Smi::FromInt(1));
|
|
if (expr->op() == Token::INC) {
|
|
__ CallRuntime(Runtime::kNumberAdd, 2);
|
|
} else {
|
|
__ CallRuntime(Runtime::kNumberSub, 2);
|
|
}
|
|
// Call Store IC.
|
|
__ Move(rcx, proxy->AsVariable()->name());
|
|
__ push(CodeGenerator::GlobalObject());
|
|
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize));
|
|
__ call(ic, RelocInfo::CODE_TARGET);
|
|
// Restore up stack after store IC
|
|
__ addq(rsp, Immediate(kPointerSize));
|
|
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
case Expression::kEffect: // Fall through
|
|
case Expression::kValue:
|
|
// Do nothing. Result in either on the stack for value context
|
|
// or discarded for effect context.
|
|
break;
|
|
case Expression::kTest:
|
|
__ pop(rax);
|
|
TestAndBranch(rax, true_label_, false_label_);
|
|
break;
|
|
case Expression::kValueTest: {
|
|
Label discard;
|
|
__ movq(rax, Operand(rsp, 0));
|
|
TestAndBranch(rax, true_label_, &discard);
|
|
__ bind(&discard);
|
|
__ addq(rsp, Immediate(kPointerSize));
|
|
__ jmp(false_label_);
|
|
break;
|
|
}
|
|
case Expression::kTestValue: {
|
|
Label discard;
|
|
__ movq(rax, Operand(rsp, 0));
|
|
TestAndBranch(rax, &discard, false_label_);
|
|
__ bind(&discard);
|
|
__ addq(rsp, Immediate(kPointerSize));
|
|
__ jmp(true_label_);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
|
|
switch (expr->op()) {
|
|
case Token::VOID: {
|
|
Comment cmnt(masm_, "[ UnaryOperation (VOID)");
|
|
Visit(expr->expression());
|
|
ASSERT_EQ(Expression::kEffect, expr->expression()->context());
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
break;
|
|
case Expression::kEffect:
|
|
break;
|
|
case Expression::kValue:
|
|
__ PushRoot(Heap::kUndefinedValueRootIndex);
|
|
break;
|
|
case Expression::kTestValue:
|
|
// Value is false so it's needed.
|
|
__ PushRoot(Heap::kUndefinedValueRootIndex);
|
|
// Fall through.
|
|
case Expression::kTest: // Fall through.
|
|
case Expression::kValueTest:
|
|
__ jmp(false_label_);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case Token::NOT: {
|
|
Comment cmnt(masm_, "[ UnaryOperation (NOT)");
|
|
ASSERT_EQ(Expression::kTest, expr->expression()->context());
|
|
|
|
Label push_true;
|
|
Label push_false;
|
|
Label done;
|
|
Label* saved_true = true_label_;
|
|
Label* saved_false = false_label_;
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
break;
|
|
|
|
case Expression::kValue:
|
|
true_label_ = &push_false;
|
|
false_label_ = &push_true;
|
|
Visit(expr->expression());
|
|
__ bind(&push_true);
|
|
__ PushRoot(Heap::kTrueValueRootIndex);
|
|
__ jmp(&done);
|
|
__ bind(&push_false);
|
|
__ PushRoot(Heap::kFalseValueRootIndex);
|
|
__ bind(&done);
|
|
break;
|
|
|
|
case Expression::kEffect:
|
|
true_label_ = &done;
|
|
false_label_ = &done;
|
|
Visit(expr->expression());
|
|
__ bind(&done);
|
|
break;
|
|
|
|
case Expression::kTest:
|
|
true_label_ = saved_false;
|
|
false_label_ = saved_true;
|
|
Visit(expr->expression());
|
|
break;
|
|
|
|
case Expression::kValueTest:
|
|
true_label_ = saved_false;
|
|
false_label_ = &push_true;
|
|
Visit(expr->expression());
|
|
__ bind(&push_true);
|
|
__ PushRoot(Heap::kTrueValueRootIndex);
|
|
__ jmp(saved_true);
|
|
break;
|
|
|
|
case Expression::kTestValue:
|
|
true_label_ = &push_false;
|
|
false_label_ = saved_true;
|
|
Visit(expr->expression());
|
|
__ bind(&push_false);
|
|
__ PushRoot(Heap::kFalseValueRootIndex);
|
|
__ jmp(saved_false);
|
|
break;
|
|
}
|
|
true_label_ = saved_true;
|
|
false_label_ = saved_false;
|
|
break;
|
|
}
|
|
|
|
case Token::TYPEOF: {
|
|
Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)");
|
|
ASSERT_EQ(Expression::kValue, expr->expression()->context());
|
|
|
|
VariableProxy* proxy = expr->expression()->AsVariableProxy();
|
|
if (proxy != NULL &&
|
|
!proxy->var()->is_this() &&
|
|
proxy->var()->is_global()) {
|
|
Comment cmnt(masm_, "Global variable");
|
|
__ push(CodeGenerator::GlobalObject());
|
|
__ Move(rcx, 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);
|
|
__ movq(Operand(rsp, 0), rax);
|
|
} else if (proxy != NULL &&
|
|
proxy->var()->slot() != NULL &&
|
|
proxy->var()->slot()->type() == Slot::LOOKUP) {
|
|
__ push(rsi);
|
|
__ Push(proxy->name());
|
|
__ CallRuntime(Runtime::kLoadContextSlotNoReferenceError, 2);
|
|
__ push(rax);
|
|
} else {
|
|
// This expression cannot throw a reference error at the top level.
|
|
Visit(expr->expression());
|
|
}
|
|
|
|
__ CallRuntime(Runtime::kTypeof, 1);
|
|
Move(expr->context(), rax);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
UNREACHABLE();
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::VisitBinaryOperation(BinaryOperation* expr) {
|
|
Comment cmnt(masm_, "[ BinaryOperation");
|
|
switch (expr->op()) {
|
|
case Token::COMMA:
|
|
ASSERT_EQ(Expression::kEffect, expr->left()->context());
|
|
ASSERT_EQ(expr->context(), expr->right()->context());
|
|
Visit(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: {
|
|
ASSERT_EQ(Expression::kValue, expr->left()->context());
|
|
ASSERT_EQ(Expression::kValue, expr->right()->context());
|
|
|
|
Visit(expr->left());
|
|
Visit(expr->right());
|
|
GenericBinaryOpStub stub(expr->op(),
|
|
NO_OVERWRITE,
|
|
NO_GENERIC_BINARY_FLAGS);
|
|
__ CallStub(&stub);
|
|
Move(expr->context(), rax);
|
|
|
|
break;
|
|
}
|
|
default:
|
|
UNREACHABLE();
|
|
}
|
|
}
|
|
|
|
|
|
void FastCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
|
|
Comment cmnt(masm_, "[ CompareOperation");
|
|
ASSERT_EQ(Expression::kValue, expr->left()->context());
|
|
ASSERT_EQ(Expression::kValue, expr->right()->context());
|
|
Visit(expr->left());
|
|
Visit(expr->right());
|
|
|
|
// Convert current context to test context: Pre-test code.
|
|
Label push_true;
|
|
Label push_false;
|
|
Label done;
|
|
Label* saved_true = true_label_;
|
|
Label* saved_false = false_label_;
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
break;
|
|
|
|
case Expression::kValue:
|
|
true_label_ = &push_true;
|
|
false_label_ = &push_false;
|
|
break;
|
|
|
|
case Expression::kEffect:
|
|
true_label_ = &done;
|
|
false_label_ = &done;
|
|
break;
|
|
|
|
case Expression::kTest:
|
|
break;
|
|
|
|
case Expression::kValueTest:
|
|
true_label_ = &push_true;
|
|
break;
|
|
|
|
case Expression::kTestValue:
|
|
false_label_ = &push_false;
|
|
break;
|
|
}
|
|
// Convert current context to test context: End pre-test code.
|
|
|
|
switch (expr->op()) {
|
|
case Token::IN: {
|
|
__ InvokeBuiltin(Builtins::IN, CALL_FUNCTION);
|
|
__ CompareRoot(rax, Heap::kTrueValueRootIndex);
|
|
__ j(equal, true_label_);
|
|
__ jmp(false_label_);
|
|
break;
|
|
}
|
|
|
|
case Token::INSTANCEOF: {
|
|
InstanceofStub stub;
|
|
__ CallStub(&stub);
|
|
__ testq(rax, rax);
|
|
__ j(zero, true_label_); // The stub returns 0 for true.
|
|
__ jmp(false_label_);
|
|
break;
|
|
}
|
|
|
|
default: {
|
|
Condition cc = no_condition;
|
|
bool strict = false;
|
|
switch (expr->op()) {
|
|
case Token::EQ_STRICT:
|
|
strict = true;
|
|
// Fall through
|
|
case Token::EQ:
|
|
cc = equal;
|
|
__ pop(rax);
|
|
__ pop(rdx);
|
|
break;
|
|
case Token::LT:
|
|
cc = less;
|
|
__ pop(rax);
|
|
__ pop(rdx);
|
|
break;
|
|
case Token::GT:
|
|
// Reverse left and right sizes to obtain ECMA-262 conversion order.
|
|
cc = less;
|
|
__ pop(rdx);
|
|
__ pop(rax);
|
|
break;
|
|
case Token::LTE:
|
|
// Reverse left and right sizes to obtain ECMA-262 conversion order.
|
|
cc = greater_equal;
|
|
__ pop(rdx);
|
|
__ pop(rax);
|
|
break;
|
|
case Token::GTE:
|
|
cc = greater_equal;
|
|
__ pop(rax);
|
|
__ pop(rdx);
|
|
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;
|
|
__ JumpIfNotBothSmi(rax, rdx, &slow_case);
|
|
__ SmiCompare(rdx, rax);
|
|
__ j(cc, true_label_);
|
|
__ jmp(false_label_);
|
|
|
|
__ bind(&slow_case);
|
|
CompareStub stub(cc, strict);
|
|
__ CallStub(&stub);
|
|
__ testq(rax, rax);
|
|
__ j(cc, true_label_);
|
|
__ jmp(false_label_);
|
|
}
|
|
}
|
|
|
|
// Convert current context to test context: Post-test code.
|
|
switch (expr->context()) {
|
|
case Expression::kUninitialized:
|
|
UNREACHABLE();
|
|
break;
|
|
|
|
case Expression::kValue:
|
|
__ bind(&push_true);
|
|
__ PushRoot(Heap::kTrueValueRootIndex);
|
|
__ jmp(&done);
|
|
__ bind(&push_false);
|
|
__ PushRoot(Heap::kFalseValueRootIndex);
|
|
__ bind(&done);
|
|
break;
|
|
|
|
case Expression::kEffect:
|
|
__ bind(&done);
|
|
break;
|
|
|
|
case Expression::kTest:
|
|
break;
|
|
|
|
case Expression::kValueTest:
|
|
__ bind(&push_true);
|
|
__ PushRoot(Heap::kTrueValueRootIndex);
|
|
__ jmp(saved_true);
|
|
break;
|
|
|
|
case Expression::kTestValue:
|
|
__ bind(&push_false);
|
|
__ PushRoot(Heap::kFalseValueRootIndex);
|
|
__ jmp(saved_false);
|
|
break;
|
|
}
|
|
true_label_ = saved_true;
|
|
false_label_ = saved_false;
|
|
// Convert current context to test context: End post-test code.
|
|
}
|
|
|
|
|
|
#undef __
|
|
|
|
|
|
} } // namespace v8::internal
|