2c9c94bd32
BUG= TEST= Review URL: https://chromiumcodereview.appspot.com/10829009 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12186 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
4562 lines
152 KiB
C++
4562 lines
152 KiB
C++
// Copyright 2012 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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#if defined(V8_TARGET_ARCH_IA32)
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#include "code-stubs.h"
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#include "codegen.h"
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#include "compiler.h"
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#include "debug.h"
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#include "full-codegen.h"
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#include "isolate-inl.h"
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#include "parser.h"
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#include "scopes.h"
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#include "stub-cache.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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class JumpPatchSite BASE_EMBEDDED {
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public:
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explicit JumpPatchSite(MacroAssembler* masm) : masm_(masm) {
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#ifdef DEBUG
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info_emitted_ = false;
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#endif
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}
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~JumpPatchSite() {
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ASSERT(patch_site_.is_bound() == info_emitted_);
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}
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void EmitJumpIfNotSmi(Register reg,
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Label* target,
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Label::Distance distance = Label::kFar) {
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__ test(reg, Immediate(kSmiTagMask));
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EmitJump(not_carry, target, distance); // Always taken before patched.
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}
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void EmitJumpIfSmi(Register reg,
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Label* target,
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Label::Distance distance = Label::kFar) {
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__ test(reg, Immediate(kSmiTagMask));
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EmitJump(carry, target, distance); // Never taken before patched.
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}
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void EmitPatchInfo() {
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if (patch_site_.is_bound()) {
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int delta_to_patch_site = masm_->SizeOfCodeGeneratedSince(&patch_site_);
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ASSERT(is_int8(delta_to_patch_site));
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__ test(eax, Immediate(delta_to_patch_site));
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#ifdef DEBUG
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info_emitted_ = true;
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#endif
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} else {
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__ nop(); // Signals no inlined code.
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}
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}
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private:
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// jc will be patched with jz, jnc will become jnz.
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void EmitJump(Condition cc, Label* target, Label::Distance distance) {
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ASSERT(!patch_site_.is_bound() && !info_emitted_);
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ASSERT(cc == carry || cc == not_carry);
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__ bind(&patch_site_);
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__ j(cc, target, distance);
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}
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MacroAssembler* masm_;
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Label patch_site_;
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#ifdef DEBUG
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bool info_emitted_;
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#endif
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};
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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 edi: the JS function object being called (i.e. ourselves)
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// o esi: our context
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// o ebp: our caller's frame pointer
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// o esp: 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-ia32.h for its layout.
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void FullCodeGenerator::Generate() {
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CompilationInfo* info = info_;
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handler_table_ =
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isolate()->factory()->NewFixedArray(function()->handler_count(), TENURED);
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profiling_counter_ = isolate()->factory()->NewJSGlobalPropertyCell(
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Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget)));
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SetFunctionPosition(function());
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Comment cmnt(masm_, "[ function compiled by full code generator");
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ProfileEntryHookStub::MaybeCallEntryHook(masm_);
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#ifdef DEBUG
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if (strlen(FLAG_stop_at) > 0 &&
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info->function()->name()->IsEqualTo(CStrVector(FLAG_stop_at))) {
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__ int3();
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}
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#endif
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// Strict mode functions and builtins need to replace the receiver
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// with undefined when called as functions (without an explicit
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// receiver object). ecx is zero for method calls and non-zero for
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// function calls.
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if (!info->is_classic_mode() || info->is_native()) {
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Label ok;
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__ test(ecx, ecx);
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__ j(zero, &ok, Label::kNear);
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// +1 for return address.
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int receiver_offset = (info->scope()->num_parameters() + 1) * kPointerSize;
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__ mov(ecx, Operand(esp, receiver_offset));
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__ JumpIfSmi(ecx, &ok);
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__ CmpObjectType(ecx, JS_GLOBAL_PROXY_TYPE, ecx);
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__ j(not_equal, &ok, Label::kNear);
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__ mov(Operand(esp, receiver_offset),
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Immediate(isolate()->factory()->undefined_value()));
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__ bind(&ok);
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}
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// Open a frame scope to indicate that there is a frame on the stack. The
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// MANUAL indicates that the scope shouldn't actually generate code to set up
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// the frame (that is done below).
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FrameScope frame_scope(masm_, StackFrame::MANUAL);
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__ push(ebp); // Caller's frame pointer.
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__ mov(ebp, esp);
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__ push(esi); // Callee's context.
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__ push(edi); // Callee's JS Function.
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{ Comment cmnt(masm_, "[ Allocate locals");
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int locals_count = info->scope()->num_stack_slots();
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if (locals_count == 1) {
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__ push(Immediate(isolate()->factory()->undefined_value()));
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} else if (locals_count > 1) {
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__ mov(eax, Immediate(isolate()->factory()->undefined_value()));
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for (int i = 0; i < locals_count; i++) {
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__ push(eax);
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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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// Possibly allocate a local context.
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int heap_slots = info->scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS;
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if (heap_slots > 0) {
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Comment cmnt(masm_, "[ Allocate local context");
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// Argument to NewContext is the function, which is still in edi.
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__ push(edi);
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if (heap_slots <= FastNewContextStub::kMaximumSlots) {
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FastNewContextStub stub(heap_slots);
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__ CallStub(&stub);
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} else {
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__ CallRuntime(Runtime::kNewFunctionContext, 1);
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}
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function_in_register = false;
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// Context is returned in both eax and esi. It replaces the context
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// passed to us. It's saved in the stack and kept live in esi.
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__ mov(Operand(ebp, StandardFrameConstants::kContextOffset), esi);
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// Copy parameters into context if necessary.
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int num_parameters = info->scope()->num_parameters();
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for (int i = 0; i < num_parameters; i++) {
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Variable* var = scope()->parameter(i);
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if (var->IsContextSlot()) {
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int parameter_offset = StandardFrameConstants::kCallerSPOffset +
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(num_parameters - 1 - i) * kPointerSize;
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// Load parameter from stack.
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__ mov(eax, Operand(ebp, parameter_offset));
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// Store it in the context.
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int context_offset = Context::SlotOffset(var->index());
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__ mov(Operand(esi, context_offset), eax);
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// Update the write barrier. This clobbers eax and ebx.
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__ RecordWriteContextSlot(esi,
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context_offset,
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eax,
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ebx,
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kDontSaveFPRegs);
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}
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}
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}
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Variable* arguments = scope()->arguments();
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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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if (function_in_register) {
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__ push(edi);
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} else {
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__ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
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}
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// Receiver is just before the parameters on the caller's stack.
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int num_parameters = info->scope()->num_parameters();
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int offset = num_parameters * kPointerSize;
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__ lea(edx,
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Operand(ebp, StandardFrameConstants::kCallerSPOffset + offset));
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__ push(edx);
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__ push(Immediate(Smi::FromInt(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::Type type;
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if (!is_classic_mode()) {
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type = ArgumentsAccessStub::NEW_STRICT;
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} else if (function()->has_duplicate_parameters()) {
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type = ArgumentsAccessStub::NEW_NON_STRICT_SLOW;
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} else {
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type = ArgumentsAccessStub::NEW_NON_STRICT_FAST;
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}
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ArgumentsAccessStub stub(type);
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__ CallStub(&stub);
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SetVar(arguments, eax, ebx, edx);
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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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// Visit the declarations and body unless there is an illegal
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// redeclaration.
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if (scope()->HasIllegalRedeclaration()) {
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Comment cmnt(masm_, "[ Declarations");
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scope()->VisitIllegalRedeclaration(this);
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} else {
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PrepareForBailoutForId(AstNode::kFunctionEntryId, NO_REGISTERS);
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{ Comment cmnt(masm_, "[ Declarations");
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// For named function expressions, declare the function name as a
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// constant.
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if (scope()->is_function_scope() && scope()->function() != NULL) {
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VariableDeclaration* function = scope()->function();
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ASSERT(function->proxy()->var()->mode() == CONST ||
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function->proxy()->var()->mode() == CONST_HARMONY);
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ASSERT(function->proxy()->var()->location() != Variable::UNALLOCATED);
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VisitVariableDeclaration(function);
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}
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VisitDeclarations(scope()->declarations());
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}
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{ Comment cmnt(masm_, "[ Stack check");
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PrepareForBailoutForId(AstNode::kDeclarationsId, NO_REGISTERS);
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Label ok;
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ExternalReference stack_limit =
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ExternalReference::address_of_stack_limit(isolate());
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__ cmp(esp, Operand::StaticVariable(stack_limit));
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__ j(above_equal, &ok, Label::kNear);
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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_, "[ Body");
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ASSERT(loop_depth() == 0);
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VisitStatements(function()->body());
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ASSERT(loop_depth() == 0);
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}
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}
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// Always emit a 'return undefined' in case control fell off the end of
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// the body.
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{ Comment cmnt(masm_, "[ return <undefined>;");
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__ mov(eax, isolate()->factory()->undefined_value());
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EmitReturnSequence();
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}
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}
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void FullCodeGenerator::ClearAccumulator() {
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__ Set(eax, Immediate(Smi::FromInt(0)));
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}
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void FullCodeGenerator::EmitProfilingCounterDecrement(int delta) {
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__ mov(ebx, Immediate(profiling_counter_));
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__ sub(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset),
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Immediate(Smi::FromInt(delta)));
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}
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void FullCodeGenerator::EmitProfilingCounterReset() {
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int reset_value = FLAG_interrupt_budget;
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if (info_->ShouldSelfOptimize() && !FLAG_retry_self_opt) {
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// Self-optimization is a one-off thing: if it fails, don't try again.
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reset_value = Smi::kMaxValue;
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}
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__ mov(ebx, Immediate(profiling_counter_));
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__ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset),
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Immediate(Smi::FromInt(reset_value)));
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}
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const int FullCodeGenerator::kMaxBackEdgeWeight = 127;
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const int FullCodeGenerator::kBackEdgeDistanceUnit = 100;
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void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt,
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Label* back_edge_target) {
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Comment cmnt(masm_, "[ Stack check");
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Label ok;
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if (FLAG_count_based_interrupts) {
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int weight = 1;
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if (FLAG_weighted_back_edges) {
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ASSERT(back_edge_target->is_bound());
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int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target);
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weight = Min(kMaxBackEdgeWeight,
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Max(1, distance / kBackEdgeDistanceUnit));
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}
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EmitProfilingCounterDecrement(weight);
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__ j(positive, &ok, Label::kNear);
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InterruptStub stub;
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__ CallStub(&stub);
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} else {
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// Count based interrupts happen often enough when they are enabled
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// that the additional stack checks are not necessary (they would
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// only check for interrupts).
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ExternalReference stack_limit =
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ExternalReference::address_of_stack_limit(isolate());
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__ cmp(esp, Operand::StaticVariable(stack_limit));
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__ j(above_equal, &ok, Label::kNear);
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StackCheckStub stub;
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__ CallStub(&stub);
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}
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// Record a mapping of this PC offset to the OSR id. This is used to find
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// the AST id from the unoptimized code in order to use it as a key into
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// the deoptimization input data found in the optimized code.
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RecordStackCheck(stmt->OsrEntryId());
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// Loop stack checks can be patched to perform on-stack replacement. In
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// order to decide whether or not to perform OSR we embed the loop depth
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// in a test instruction after the call so we can extract it from the OSR
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// builtin.
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ASSERT(loop_depth() > 0);
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__ test(eax, Immediate(Min(loop_depth(), Code::kMaxLoopNestingMarker)));
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if (FLAG_count_based_interrupts) {
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EmitProfilingCounterReset();
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}
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__ bind(&ok);
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PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);
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// Record a mapping of the OSR id to this PC. This is used if the OSR
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// entry becomes the target of a bailout. We don't expect it to be, but
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// we want it to work if it is.
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PrepareForBailoutForId(stmt->OsrEntryId(), NO_REGISTERS);
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}
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void FullCodeGenerator::EmitReturnSequence() {
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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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// Common return label
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__ bind(&return_label_);
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if (FLAG_trace) {
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__ push(eax);
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__ CallRuntime(Runtime::kTraceExit, 1);
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}
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if (FLAG_interrupt_at_exit || FLAG_self_optimization) {
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// Pretend that the exit is a backwards jump to the entry.
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int weight = 1;
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if (info_->ShouldSelfOptimize()) {
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weight = FLAG_interrupt_budget / FLAG_self_opt_count;
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} else if (FLAG_weighted_back_edges) {
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int distance = masm_->pc_offset();
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weight = Min(kMaxBackEdgeWeight,
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Max(1, distance / kBackEdgeDistanceUnit));
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}
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EmitProfilingCounterDecrement(weight);
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Label ok;
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__ j(positive, &ok, Label::kNear);
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__ push(eax);
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if (info_->ShouldSelfOptimize() && FLAG_direct_self_opt) {
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__ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
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__ CallRuntime(Runtime::kOptimizeFunctionOnNextCall, 1);
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} else {
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InterruptStub stub;
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__ CallStub(&stub);
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}
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__ pop(eax);
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EmitProfilingCounterReset();
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__ bind(&ok);
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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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SetSourcePosition(function()->end_position() - 1);
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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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__ mov(esp, ebp);
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__ pop(ebp);
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int arguments_bytes = (info_->scope()->num_parameters() + 1) * kPointerSize;
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__ Ret(arguments_bytes, ecx);
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#ifdef ENABLE_DEBUGGER_SUPPORT
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// Check that the size of the code used for returning is large enough
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// for the debugger's requirements.
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ASSERT(Assembler::kJSReturnSequenceLength <=
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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 FullCodeGenerator::EffectContext::Plug(Variable* var) const {
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ASSERT(var->IsStackAllocated() || var->IsContextSlot());
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}
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void FullCodeGenerator::AccumulatorValueContext::Plug(Variable* var) const {
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ASSERT(var->IsStackAllocated() || var->IsContextSlot());
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codegen()->GetVar(result_register(), var);
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}
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void FullCodeGenerator::StackValueContext::Plug(Variable* var) const {
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ASSERT(var->IsStackAllocated() || var->IsContextSlot());
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MemOperand operand = codegen()->VarOperand(var, result_register());
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// Memory operands can be pushed directly.
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__ push(operand);
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}
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void FullCodeGenerator::TestContext::Plug(Variable* var) const {
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// For simplicity we always test the accumulator register.
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codegen()->GetVar(result_register(), var);
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codegen()->PrepareForBailoutBeforeSplit(condition(), false, NULL, NULL);
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codegen()->DoTest(this);
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}
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void FullCodeGenerator::EffectContext::Plug(Heap::RootListIndex index) const {
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UNREACHABLE(); // Not used on IA32.
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}
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void FullCodeGenerator::AccumulatorValueContext::Plug(
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Heap::RootListIndex index) const {
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UNREACHABLE(); // Not used on IA32.
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}
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void FullCodeGenerator::StackValueContext::Plug(
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Heap::RootListIndex index) const {
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UNREACHABLE(); // Not used on IA32.
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}
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|
|
void FullCodeGenerator::TestContext::Plug(Heap::RootListIndex index) const {
|
|
UNREACHABLE(); // Not used on IA32.
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EffectContext::Plug(Handle<Object> lit) const {
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::AccumulatorValueContext::Plug(
|
|
Handle<Object> lit) const {
|
|
if (lit->IsSmi()) {
|
|
__ SafeSet(result_register(), Immediate(lit));
|
|
} else {
|
|
__ Set(result_register(), Immediate(lit));
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::StackValueContext::Plug(Handle<Object> lit) const {
|
|
if (lit->IsSmi()) {
|
|
__ SafePush(Immediate(lit));
|
|
} else {
|
|
__ push(Immediate(lit));
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::TestContext::Plug(Handle<Object> lit) const {
|
|
codegen()->PrepareForBailoutBeforeSplit(condition(),
|
|
true,
|
|
true_label_,
|
|
false_label_);
|
|
ASSERT(!lit->IsUndetectableObject()); // There are no undetectable literals.
|
|
if (lit->IsUndefined() || lit->IsNull() || lit->IsFalse()) {
|
|
if (false_label_ != fall_through_) __ jmp(false_label_);
|
|
} else if (lit->IsTrue() || lit->IsJSObject()) {
|
|
if (true_label_ != fall_through_) __ jmp(true_label_);
|
|
} else if (lit->IsString()) {
|
|
if (String::cast(*lit)->length() == 0) {
|
|
if (false_label_ != fall_through_) __ jmp(false_label_);
|
|
} else {
|
|
if (true_label_ != fall_through_) __ jmp(true_label_);
|
|
}
|
|
} else if (lit->IsSmi()) {
|
|
if (Smi::cast(*lit)->value() == 0) {
|
|
if (false_label_ != fall_through_) __ jmp(false_label_);
|
|
} else {
|
|
if (true_label_ != fall_through_) __ jmp(true_label_);
|
|
}
|
|
} else {
|
|
// For simplicity we always test the accumulator register.
|
|
__ mov(result_register(), lit);
|
|
codegen()->DoTest(this);
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EffectContext::DropAndPlug(int count,
|
|
Register reg) const {
|
|
ASSERT(count > 0);
|
|
__ Drop(count);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::AccumulatorValueContext::DropAndPlug(
|
|
int count,
|
|
Register reg) const {
|
|
ASSERT(count > 0);
|
|
__ Drop(count);
|
|
__ Move(result_register(), reg);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::StackValueContext::DropAndPlug(int count,
|
|
Register reg) const {
|
|
ASSERT(count > 0);
|
|
if (count > 1) __ Drop(count - 1);
|
|
__ mov(Operand(esp, 0), reg);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::TestContext::DropAndPlug(int count,
|
|
Register reg) const {
|
|
ASSERT(count > 0);
|
|
// For simplicity we always test the accumulator register.
|
|
__ Drop(count);
|
|
__ Move(result_register(), reg);
|
|
codegen()->PrepareForBailoutBeforeSplit(condition(), false, NULL, NULL);
|
|
codegen()->DoTest(this);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EffectContext::Plug(Label* materialize_true,
|
|
Label* materialize_false) const {
|
|
ASSERT(materialize_true == materialize_false);
|
|
__ bind(materialize_true);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::AccumulatorValueContext::Plug(
|
|
Label* materialize_true,
|
|
Label* materialize_false) const {
|
|
Label done;
|
|
__ bind(materialize_true);
|
|
__ mov(result_register(), isolate()->factory()->true_value());
|
|
__ jmp(&done, Label::kNear);
|
|
__ bind(materialize_false);
|
|
__ mov(result_register(), isolate()->factory()->false_value());
|
|
__ bind(&done);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::StackValueContext::Plug(
|
|
Label* materialize_true,
|
|
Label* materialize_false) const {
|
|
Label done;
|
|
__ bind(materialize_true);
|
|
__ push(Immediate(isolate()->factory()->true_value()));
|
|
__ jmp(&done, Label::kNear);
|
|
__ bind(materialize_false);
|
|
__ push(Immediate(isolate()->factory()->false_value()));
|
|
__ bind(&done);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::TestContext::Plug(Label* materialize_true,
|
|
Label* materialize_false) const {
|
|
ASSERT(materialize_true == true_label_);
|
|
ASSERT(materialize_false == false_label_);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EffectContext::Plug(bool flag) const {
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::AccumulatorValueContext::Plug(bool flag) const {
|
|
Handle<Object> value = flag
|
|
? isolate()->factory()->true_value()
|
|
: isolate()->factory()->false_value();
|
|
__ mov(result_register(), value);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::StackValueContext::Plug(bool flag) const {
|
|
Handle<Object> value = flag
|
|
? isolate()->factory()->true_value()
|
|
: isolate()->factory()->false_value();
|
|
__ push(Immediate(value));
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::TestContext::Plug(bool flag) const {
|
|
codegen()->PrepareForBailoutBeforeSplit(condition(),
|
|
true,
|
|
true_label_,
|
|
false_label_);
|
|
if (flag) {
|
|
if (true_label_ != fall_through_) __ jmp(true_label_);
|
|
} else {
|
|
if (false_label_ != fall_through_) __ jmp(false_label_);
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::DoTest(Expression* condition,
|
|
Label* if_true,
|
|
Label* if_false,
|
|
Label* fall_through) {
|
|
ToBooleanStub stub(result_register());
|
|
__ push(result_register());
|
|
__ CallStub(&stub, condition->test_id());
|
|
__ test(result_register(), result_register());
|
|
// The stub returns nonzero for true.
|
|
Split(not_zero, if_true, if_false, fall_through);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::Split(Condition cc,
|
|
Label* if_true,
|
|
Label* if_false,
|
|
Label* fall_through) {
|
|
if (if_false == fall_through) {
|
|
__ j(cc, if_true);
|
|
} else if (if_true == fall_through) {
|
|
__ j(NegateCondition(cc), if_false);
|
|
} else {
|
|
__ j(cc, if_true);
|
|
__ jmp(if_false);
|
|
}
|
|
}
|
|
|
|
|
|
MemOperand FullCodeGenerator::StackOperand(Variable* var) {
|
|
ASSERT(var->IsStackAllocated());
|
|
// Offset is negative because higher indexes are at lower addresses.
|
|
int offset = -var->index() * kPointerSize;
|
|
// Adjust by a (parameter or local) base offset.
|
|
if (var->IsParameter()) {
|
|
offset += (info_->scope()->num_parameters() + 1) * kPointerSize;
|
|
} else {
|
|
offset += JavaScriptFrameConstants::kLocal0Offset;
|
|
}
|
|
return Operand(ebp, offset);
|
|
}
|
|
|
|
|
|
MemOperand FullCodeGenerator::VarOperand(Variable* var, Register scratch) {
|
|
ASSERT(var->IsContextSlot() || var->IsStackAllocated());
|
|
if (var->IsContextSlot()) {
|
|
int context_chain_length = scope()->ContextChainLength(var->scope());
|
|
__ LoadContext(scratch, context_chain_length);
|
|
return ContextOperand(scratch, var->index());
|
|
} else {
|
|
return StackOperand(var);
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::GetVar(Register dest, Variable* var) {
|
|
ASSERT(var->IsContextSlot() || var->IsStackAllocated());
|
|
MemOperand location = VarOperand(var, dest);
|
|
__ mov(dest, location);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::SetVar(Variable* var,
|
|
Register src,
|
|
Register scratch0,
|
|
Register scratch1) {
|
|
ASSERT(var->IsContextSlot() || var->IsStackAllocated());
|
|
ASSERT(!scratch0.is(src));
|
|
ASSERT(!scratch0.is(scratch1));
|
|
ASSERT(!scratch1.is(src));
|
|
MemOperand location = VarOperand(var, scratch0);
|
|
__ mov(location, src);
|
|
|
|
// Emit the write barrier code if the location is in the heap.
|
|
if (var->IsContextSlot()) {
|
|
int offset = Context::SlotOffset(var->index());
|
|
ASSERT(!scratch0.is(esi) && !src.is(esi) && !scratch1.is(esi));
|
|
__ RecordWriteContextSlot(scratch0, offset, src, scratch1, kDontSaveFPRegs);
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::PrepareForBailoutBeforeSplit(Expression* expr,
|
|
bool should_normalize,
|
|
Label* if_true,
|
|
Label* if_false) {
|
|
// Only prepare for bailouts before splits if we're in a test
|
|
// context. Otherwise, we let the Visit function deal with the
|
|
// preparation to avoid preparing with the same AST id twice.
|
|
if (!context()->IsTest() || !info_->IsOptimizable()) return;
|
|
|
|
Label skip;
|
|
if (should_normalize) __ jmp(&skip, Label::kNear);
|
|
PrepareForBailout(expr, TOS_REG);
|
|
if (should_normalize) {
|
|
__ cmp(eax, isolate()->factory()->true_value());
|
|
Split(equal, if_true, if_false, NULL);
|
|
__ bind(&skip);
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitDebugCheckDeclarationContext(Variable* variable) {
|
|
// The variable in the declaration always resides in the current function
|
|
// context.
|
|
ASSERT_EQ(0, scope()->ContextChainLength(variable->scope()));
|
|
if (FLAG_debug_code) {
|
|
// Check that we're not inside a with or catch context.
|
|
__ mov(ebx, FieldOperand(esi, HeapObject::kMapOffset));
|
|
__ cmp(ebx, isolate()->factory()->with_context_map());
|
|
__ Check(not_equal, "Declaration in with context.");
|
|
__ cmp(ebx, isolate()->factory()->catch_context_map());
|
|
__ Check(not_equal, "Declaration in catch context.");
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitVariableDeclaration(
|
|
VariableDeclaration* declaration) {
|
|
// If it was not possible to allocate the variable at compile time, we
|
|
// need to "declare" it at runtime to make sure it actually exists in the
|
|
// local context.
|
|
VariableProxy* proxy = declaration->proxy();
|
|
VariableMode mode = declaration->mode();
|
|
Variable* variable = proxy->var();
|
|
bool hole_init = mode == CONST || mode == CONST_HARMONY || mode == LET;
|
|
switch (variable->location()) {
|
|
case Variable::UNALLOCATED:
|
|
globals_->Add(variable->name(), zone());
|
|
globals_->Add(variable->binding_needs_init()
|
|
? isolate()->factory()->the_hole_value()
|
|
: isolate()->factory()->undefined_value(), zone());
|
|
break;
|
|
|
|
case Variable::PARAMETER:
|
|
case Variable::LOCAL:
|
|
if (hole_init) {
|
|
Comment cmnt(masm_, "[ VariableDeclaration");
|
|
__ mov(StackOperand(variable),
|
|
Immediate(isolate()->factory()->the_hole_value()));
|
|
}
|
|
break;
|
|
|
|
case Variable::CONTEXT:
|
|
if (hole_init) {
|
|
Comment cmnt(masm_, "[ VariableDeclaration");
|
|
EmitDebugCheckDeclarationContext(variable);
|
|
__ mov(ContextOperand(esi, variable->index()),
|
|
Immediate(isolate()->factory()->the_hole_value()));
|
|
// No write barrier since the hole value is in old space.
|
|
PrepareForBailoutForId(proxy->id(), NO_REGISTERS);
|
|
}
|
|
break;
|
|
|
|
case Variable::LOOKUP: {
|
|
Comment cmnt(masm_, "[ VariableDeclaration");
|
|
__ push(esi);
|
|
__ push(Immediate(variable->name()));
|
|
// VariableDeclaration nodes are always introduced in one of four modes.
|
|
ASSERT(mode == VAR || mode == LET ||
|
|
mode == CONST || mode == CONST_HARMONY);
|
|
PropertyAttributes attr = (mode == CONST || mode == CONST_HARMONY)
|
|
? READ_ONLY : NONE;
|
|
__ push(Immediate(Smi::FromInt(attr)));
|
|
// Push initial value, if any.
|
|
// Note: For variables we must not push an initial value (such as
|
|
// 'undefined') because we may have a (legal) redeclaration and we
|
|
// must not destroy the current value.
|
|
if (hole_init) {
|
|
__ push(Immediate(isolate()->factory()->the_hole_value()));
|
|
} else {
|
|
__ push(Immediate(Smi::FromInt(0))); // Indicates no initial value.
|
|
}
|
|
__ CallRuntime(Runtime::kDeclareContextSlot, 4);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitFunctionDeclaration(
|
|
FunctionDeclaration* declaration) {
|
|
VariableProxy* proxy = declaration->proxy();
|
|
Variable* variable = proxy->var();
|
|
switch (variable->location()) {
|
|
case Variable::UNALLOCATED: {
|
|
globals_->Add(variable->name(), zone());
|
|
Handle<SharedFunctionInfo> function =
|
|
Compiler::BuildFunctionInfo(declaration->fun(), script());
|
|
// Check for stack-overflow exception.
|
|
if (function.is_null()) return SetStackOverflow();
|
|
globals_->Add(function, zone());
|
|
break;
|
|
}
|
|
|
|
case Variable::PARAMETER:
|
|
case Variable::LOCAL: {
|
|
Comment cmnt(masm_, "[ FunctionDeclaration");
|
|
VisitForAccumulatorValue(declaration->fun());
|
|
__ mov(StackOperand(variable), result_register());
|
|
break;
|
|
}
|
|
|
|
case Variable::CONTEXT: {
|
|
Comment cmnt(masm_, "[ FunctionDeclaration");
|
|
EmitDebugCheckDeclarationContext(variable);
|
|
VisitForAccumulatorValue(declaration->fun());
|
|
__ mov(ContextOperand(esi, variable->index()), result_register());
|
|
// We know that we have written a function, which is not a smi.
|
|
__ RecordWriteContextSlot(esi,
|
|
Context::SlotOffset(variable->index()),
|
|
result_register(),
|
|
ecx,
|
|
kDontSaveFPRegs,
|
|
EMIT_REMEMBERED_SET,
|
|
OMIT_SMI_CHECK);
|
|
PrepareForBailoutForId(proxy->id(), NO_REGISTERS);
|
|
break;
|
|
}
|
|
|
|
case Variable::LOOKUP: {
|
|
Comment cmnt(masm_, "[ FunctionDeclaration");
|
|
__ push(esi);
|
|
__ push(Immediate(variable->name()));
|
|
__ push(Immediate(Smi::FromInt(NONE)));
|
|
VisitForStackValue(declaration->fun());
|
|
__ CallRuntime(Runtime::kDeclareContextSlot, 4);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitModuleDeclaration(ModuleDeclaration* declaration) {
|
|
VariableProxy* proxy = declaration->proxy();
|
|
Variable* variable = proxy->var();
|
|
Handle<JSModule> instance = declaration->module()->interface()->Instance();
|
|
ASSERT(!instance.is_null());
|
|
|
|
switch (variable->location()) {
|
|
case Variable::UNALLOCATED: {
|
|
Comment cmnt(masm_, "[ ModuleDeclaration");
|
|
globals_->Add(variable->name(), zone());
|
|
globals_->Add(instance, zone());
|
|
Visit(declaration->module());
|
|
break;
|
|
}
|
|
|
|
case Variable::CONTEXT: {
|
|
Comment cmnt(masm_, "[ ModuleDeclaration");
|
|
EmitDebugCheckDeclarationContext(variable);
|
|
__ mov(ContextOperand(esi, variable->index()), Immediate(instance));
|
|
Visit(declaration->module());
|
|
break;
|
|
}
|
|
|
|
case Variable::PARAMETER:
|
|
case Variable::LOCAL:
|
|
case Variable::LOOKUP:
|
|
UNREACHABLE();
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitImportDeclaration(ImportDeclaration* declaration) {
|
|
VariableProxy* proxy = declaration->proxy();
|
|
Variable* variable = proxy->var();
|
|
switch (variable->location()) {
|
|
case Variable::UNALLOCATED:
|
|
// TODO(rossberg)
|
|
break;
|
|
|
|
case Variable::CONTEXT: {
|
|
Comment cmnt(masm_, "[ ImportDeclaration");
|
|
EmitDebugCheckDeclarationContext(variable);
|
|
// TODO(rossberg)
|
|
break;
|
|
}
|
|
|
|
case Variable::PARAMETER:
|
|
case Variable::LOCAL:
|
|
case Variable::LOOKUP:
|
|
UNREACHABLE();
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitExportDeclaration(ExportDeclaration* declaration) {
|
|
// TODO(rossberg)
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) {
|
|
// Call the runtime to declare the globals.
|
|
__ push(esi); // The context is the first argument.
|
|
__ push(Immediate(pairs));
|
|
__ push(Immediate(Smi::FromInt(DeclareGlobalsFlags())));
|
|
__ CallRuntime(Runtime::kDeclareGlobals, 3);
|
|
// Return value is ignored.
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
|
|
Comment cmnt(masm_, "[ SwitchStatement");
|
|
Breakable nested_statement(this, stmt);
|
|
SetStatementPosition(stmt);
|
|
|
|
// Keep the switch value on the stack until a case matches.
|
|
VisitForStackValue(stmt->tag());
|
|
PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);
|
|
|
|
ZoneList<CaseClause*>* clauses = stmt->cases();
|
|
CaseClause* default_clause = NULL; // Can occur anywhere in the list.
|
|
|
|
Label next_test; // Recycled for each test.
|
|
// Compile all the tests with branches to their bodies.
|
|
for (int i = 0; i < clauses->length(); i++) {
|
|
CaseClause* clause = clauses->at(i);
|
|
clause->body_target()->Unuse();
|
|
|
|
// The default is not a test, but remember it as final fall through.
|
|
if (clause->is_default()) {
|
|
default_clause = clause;
|
|
continue;
|
|
}
|
|
|
|
Comment cmnt(masm_, "[ Case comparison");
|
|
__ bind(&next_test);
|
|
next_test.Unuse();
|
|
|
|
// Compile the label expression.
|
|
VisitForAccumulatorValue(clause->label());
|
|
|
|
// Perform the comparison as if via '==='.
|
|
__ mov(edx, Operand(esp, 0)); // Switch value.
|
|
bool inline_smi_code = ShouldInlineSmiCase(Token::EQ_STRICT);
|
|
JumpPatchSite patch_site(masm_);
|
|
if (inline_smi_code) {
|
|
Label slow_case;
|
|
__ mov(ecx, edx);
|
|
__ or_(ecx, eax);
|
|
patch_site.EmitJumpIfNotSmi(ecx, &slow_case, Label::kNear);
|
|
|
|
__ cmp(edx, eax);
|
|
__ j(not_equal, &next_test);
|
|
__ Drop(1); // Switch value is no longer needed.
|
|
__ jmp(clause->body_target());
|
|
__ bind(&slow_case);
|
|
}
|
|
|
|
// Record position before stub call for type feedback.
|
|
SetSourcePosition(clause->position());
|
|
Handle<Code> ic = CompareIC::GetUninitialized(Token::EQ_STRICT);
|
|
CallIC(ic, RelocInfo::CODE_TARGET, clause->CompareId());
|
|
patch_site.EmitPatchInfo();
|
|
__ test(eax, eax);
|
|
__ j(not_equal, &next_test);
|
|
__ Drop(1); // Switch value is no longer needed.
|
|
__ jmp(clause->body_target());
|
|
}
|
|
|
|
// Discard the test value and jump to the default if present, otherwise to
|
|
// the end of the statement.
|
|
__ bind(&next_test);
|
|
__ Drop(1); // Switch value is no longer needed.
|
|
if (default_clause == NULL) {
|
|
__ jmp(nested_statement.break_label());
|
|
} else {
|
|
__ jmp(default_clause->body_target());
|
|
}
|
|
|
|
// Compile all the case bodies.
|
|
for (int i = 0; i < clauses->length(); i++) {
|
|
Comment cmnt(masm_, "[ Case body");
|
|
CaseClause* clause = clauses->at(i);
|
|
__ bind(clause->body_target());
|
|
PrepareForBailoutForId(clause->EntryId(), NO_REGISTERS);
|
|
VisitStatements(clause->statements());
|
|
}
|
|
|
|
__ bind(nested_statement.break_label());
|
|
PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
|
|
Comment cmnt(masm_, "[ ForInStatement");
|
|
SetStatementPosition(stmt);
|
|
|
|
Label loop, exit;
|
|
ForIn loop_statement(this, stmt);
|
|
increment_loop_depth();
|
|
|
|
// Get the object to enumerate over. Both SpiderMonkey and JSC
|
|
// ignore null and undefined in contrast to the specification; see
|
|
// ECMA-262 section 12.6.4.
|
|
VisitForAccumulatorValue(stmt->enumerable());
|
|
__ cmp(eax, isolate()->factory()->undefined_value());
|
|
__ j(equal, &exit);
|
|
__ cmp(eax, isolate()->factory()->null_value());
|
|
__ j(equal, &exit);
|
|
|
|
PrepareForBailoutForId(stmt->PrepareId(), TOS_REG);
|
|
|
|
// Convert the object to a JS object.
|
|
Label convert, done_convert;
|
|
__ JumpIfSmi(eax, &convert, Label::kNear);
|
|
__ CmpObjectType(eax, FIRST_SPEC_OBJECT_TYPE, ecx);
|
|
__ j(above_equal, &done_convert, Label::kNear);
|
|
__ bind(&convert);
|
|
__ push(eax);
|
|
__ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
|
|
__ bind(&done_convert);
|
|
__ push(eax);
|
|
|
|
// Check for proxies.
|
|
Label call_runtime, use_cache, fixed_array;
|
|
STATIC_ASSERT(FIRST_JS_PROXY_TYPE == FIRST_SPEC_OBJECT_TYPE);
|
|
__ CmpObjectType(eax, LAST_JS_PROXY_TYPE, ecx);
|
|
__ j(below_equal, &call_runtime);
|
|
|
|
// Check cache validity in generated code. This is a fast case for
|
|
// the JSObject::IsSimpleEnum cache validity checks. If we cannot
|
|
// guarantee cache validity, call the runtime system to check cache
|
|
// validity or get the property names in a fixed array.
|
|
__ CheckEnumCache(&call_runtime);
|
|
|
|
__ mov(eax, FieldOperand(eax, HeapObject::kMapOffset));
|
|
__ jmp(&use_cache, Label::kNear);
|
|
|
|
// Get the set of properties to enumerate.
|
|
__ bind(&call_runtime);
|
|
__ push(eax);
|
|
__ CallRuntime(Runtime::kGetPropertyNamesFast, 1);
|
|
__ cmp(FieldOperand(eax, HeapObject::kMapOffset),
|
|
isolate()->factory()->meta_map());
|
|
__ j(not_equal, &fixed_array);
|
|
|
|
|
|
// We got a map in register eax. Get the enumeration cache from it.
|
|
__ bind(&use_cache);
|
|
__ LoadInstanceDescriptors(eax, ecx);
|
|
__ mov(ecx, FieldOperand(ecx, DescriptorArray::kEnumCacheOffset));
|
|
__ mov(edx, FieldOperand(ecx, DescriptorArray::kEnumCacheBridgeCacheOffset));
|
|
|
|
// Set up the four remaining stack slots.
|
|
__ push(eax); // Map.
|
|
__ push(edx); // Enumeration cache.
|
|
__ mov(eax, FieldOperand(edx, FixedArray::kLengthOffset));
|
|
__ push(eax); // Enumeration cache length (as smi).
|
|
__ push(Immediate(Smi::FromInt(0))); // Initial index.
|
|
__ jmp(&loop);
|
|
|
|
// We got a fixed array in register eax. Iterate through that.
|
|
Label non_proxy;
|
|
__ bind(&fixed_array);
|
|
|
|
Handle<JSGlobalPropertyCell> cell =
|
|
isolate()->factory()->NewJSGlobalPropertyCell(
|
|
Handle<Object>(
|
|
Smi::FromInt(TypeFeedbackCells::kForInFastCaseMarker)));
|
|
RecordTypeFeedbackCell(stmt->PrepareId(), cell);
|
|
__ LoadHeapObject(ebx, cell);
|
|
__ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset),
|
|
Immediate(Smi::FromInt(TypeFeedbackCells::kForInSlowCaseMarker)));
|
|
|
|
__ mov(ebx, Immediate(Smi::FromInt(1))); // Smi indicates slow check
|
|
__ mov(ecx, Operand(esp, 0 * kPointerSize)); // Get enumerated object
|
|
STATIC_ASSERT(FIRST_JS_PROXY_TYPE == FIRST_SPEC_OBJECT_TYPE);
|
|
__ CmpObjectType(ecx, LAST_JS_PROXY_TYPE, ecx);
|
|
__ j(above, &non_proxy);
|
|
__ mov(ebx, Immediate(Smi::FromInt(0))); // Zero indicates proxy
|
|
__ bind(&non_proxy);
|
|
__ push(ebx); // Smi
|
|
__ push(eax); // Array
|
|
__ mov(eax, FieldOperand(eax, FixedArray::kLengthOffset));
|
|
__ push(eax); // Fixed array length (as smi).
|
|
__ push(Immediate(Smi::FromInt(0))); // Initial index.
|
|
|
|
// Generate code for doing the condition check.
|
|
PrepareForBailoutForId(stmt->BodyId(), NO_REGISTERS);
|
|
__ bind(&loop);
|
|
__ mov(eax, Operand(esp, 0 * kPointerSize)); // Get the current index.
|
|
__ cmp(eax, Operand(esp, 1 * kPointerSize)); // Compare to the array length.
|
|
__ j(above_equal, loop_statement.break_label());
|
|
|
|
// Get the current entry of the array into register ebx.
|
|
__ mov(ebx, Operand(esp, 2 * kPointerSize));
|
|
__ mov(ebx, FieldOperand(ebx, eax, times_2, FixedArray::kHeaderSize));
|
|
|
|
// Get the expected map from the stack or a smi in the
|
|
// permanent slow case into register edx.
|
|
__ mov(edx, Operand(esp, 3 * kPointerSize));
|
|
|
|
// Check if the expected map still matches that of the enumerable.
|
|
// If not, we may have to filter the key.
|
|
Label update_each;
|
|
__ mov(ecx, Operand(esp, 4 * kPointerSize));
|
|
__ cmp(edx, FieldOperand(ecx, HeapObject::kMapOffset));
|
|
__ j(equal, &update_each, Label::kNear);
|
|
|
|
// For proxies, no filtering is done.
|
|
// TODO(rossberg): What if only a prototype is a proxy? Not specified yet.
|
|
ASSERT(Smi::FromInt(0) == 0);
|
|
__ test(edx, edx);
|
|
__ j(zero, &update_each);
|
|
|
|
// Convert the entry to a string or null if it isn't a property
|
|
// anymore. If the property has been removed while iterating, we
|
|
// just skip it.
|
|
__ push(ecx); // Enumerable.
|
|
__ push(ebx); // Current entry.
|
|
__ InvokeBuiltin(Builtins::FILTER_KEY, CALL_FUNCTION);
|
|
__ test(eax, eax);
|
|
__ j(equal, loop_statement.continue_label());
|
|
__ mov(ebx, eax);
|
|
|
|
// Update the 'each' property or variable from the possibly filtered
|
|
// entry in register ebx.
|
|
__ bind(&update_each);
|
|
__ mov(result_register(), ebx);
|
|
// Perform the assignment as if via '='.
|
|
{ EffectContext context(this);
|
|
EmitAssignment(stmt->each());
|
|
}
|
|
|
|
// Generate code for the body of the loop.
|
|
Visit(stmt->body());
|
|
|
|
// Generate code for going to the next element by incrementing the
|
|
// index (smi) stored on top of the stack.
|
|
__ bind(loop_statement.continue_label());
|
|
__ add(Operand(esp, 0 * kPointerSize), Immediate(Smi::FromInt(1)));
|
|
|
|
EmitStackCheck(stmt, &loop);
|
|
__ jmp(&loop);
|
|
|
|
// Remove the pointers stored on the stack.
|
|
__ bind(loop_statement.break_label());
|
|
__ add(esp, Immediate(5 * kPointerSize));
|
|
|
|
// Exit and decrement the loop depth.
|
|
PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS);
|
|
__ bind(&exit);
|
|
decrement_loop_depth();
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
|
|
bool pretenure) {
|
|
// Use the fast case closure allocation code that allocates in new
|
|
// space for nested functions that don't need literals cloning. If
|
|
// we're running with the --always-opt or the --prepare-always-opt
|
|
// flag, we need to use the runtime function so that the new function
|
|
// we are creating here gets a chance to have its code optimized and
|
|
// doesn't just get a copy of the existing unoptimized code.
|
|
if (!FLAG_always_opt &&
|
|
!FLAG_prepare_always_opt &&
|
|
!pretenure &&
|
|
scope()->is_function_scope() &&
|
|
info->num_literals() == 0) {
|
|
FastNewClosureStub stub(info->language_mode());
|
|
__ push(Immediate(info));
|
|
__ CallStub(&stub);
|
|
} else {
|
|
__ push(esi);
|
|
__ push(Immediate(info));
|
|
__ push(Immediate(pretenure
|
|
? isolate()->factory()->true_value()
|
|
: isolate()->factory()->false_value()));
|
|
__ CallRuntime(Runtime::kNewClosure, 3);
|
|
}
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
|
|
Comment cmnt(masm_, "[ VariableProxy");
|
|
EmitVariableLoad(expr);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitLoadGlobalCheckExtensions(Variable* var,
|
|
TypeofState typeof_state,
|
|
Label* slow) {
|
|
Register context = esi;
|
|
Register temp = edx;
|
|
|
|
Scope* s = scope();
|
|
while (s != NULL) {
|
|
if (s->num_heap_slots() > 0) {
|
|
if (s->calls_non_strict_eval()) {
|
|
// Check that extension is NULL.
|
|
__ cmp(ContextOperand(context, Context::EXTENSION_INDEX),
|
|
Immediate(0));
|
|
__ j(not_equal, slow);
|
|
}
|
|
// Load next context in chain.
|
|
__ mov(temp, ContextOperand(context, Context::PREVIOUS_INDEX));
|
|
// Walk the rest of the chain without clobbering esi.
|
|
context = temp;
|
|
}
|
|
// If no outer scope calls eval, we do not need to check more
|
|
// context extensions. If we have reached an eval scope, we check
|
|
// all extensions from this point.
|
|
if (!s->outer_scope_calls_non_strict_eval() || s->is_eval_scope()) break;
|
|
s = s->outer_scope();
|
|
}
|
|
|
|
if (s != NULL && s->is_eval_scope()) {
|
|
// Loop up the context chain. There is no frame effect so it is
|
|
// safe to use raw labels here.
|
|
Label next, fast;
|
|
if (!context.is(temp)) {
|
|
__ mov(temp, context);
|
|
}
|
|
__ bind(&next);
|
|
// Terminate at global context.
|
|
__ cmp(FieldOperand(temp, HeapObject::kMapOffset),
|
|
Immediate(isolate()->factory()->global_context_map()));
|
|
__ j(equal, &fast, Label::kNear);
|
|
// Check that extension is NULL.
|
|
__ cmp(ContextOperand(temp, Context::EXTENSION_INDEX), Immediate(0));
|
|
__ j(not_equal, slow);
|
|
// Load next context in chain.
|
|
__ mov(temp, ContextOperand(temp, Context::PREVIOUS_INDEX));
|
|
__ jmp(&next);
|
|
__ bind(&fast);
|
|
}
|
|
|
|
// All extension objects were empty and it is safe to use a global
|
|
// load IC call.
|
|
__ mov(edx, GlobalObjectOperand());
|
|
__ mov(ecx, var->name());
|
|
Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize();
|
|
RelocInfo::Mode mode = (typeof_state == INSIDE_TYPEOF)
|
|
? RelocInfo::CODE_TARGET
|
|
: RelocInfo::CODE_TARGET_CONTEXT;
|
|
CallIC(ic, mode);
|
|
}
|
|
|
|
|
|
MemOperand FullCodeGenerator::ContextSlotOperandCheckExtensions(Variable* var,
|
|
Label* slow) {
|
|
ASSERT(var->IsContextSlot());
|
|
Register context = esi;
|
|
Register temp = ebx;
|
|
|
|
for (Scope* s = scope(); s != var->scope(); s = s->outer_scope()) {
|
|
if (s->num_heap_slots() > 0) {
|
|
if (s->calls_non_strict_eval()) {
|
|
// Check that extension is NULL.
|
|
__ cmp(ContextOperand(context, Context::EXTENSION_INDEX),
|
|
Immediate(0));
|
|
__ j(not_equal, slow);
|
|
}
|
|
__ mov(temp, ContextOperand(context, Context::PREVIOUS_INDEX));
|
|
// Walk the rest of the chain without clobbering esi.
|
|
context = temp;
|
|
}
|
|
}
|
|
// Check that last extension is NULL.
|
|
__ cmp(ContextOperand(context, Context::EXTENSION_INDEX), Immediate(0));
|
|
__ j(not_equal, slow);
|
|
|
|
// This function is used only for loads, not stores, so it's safe to
|
|
// return an esi-based operand (the write barrier cannot be allowed to
|
|
// destroy the esi register).
|
|
return ContextOperand(context, var->index());
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitDynamicLookupFastCase(Variable* var,
|
|
TypeofState typeof_state,
|
|
Label* slow,
|
|
Label* done) {
|
|
// Generate fast-case code for variables that might be shadowed by
|
|
// eval-introduced variables. Eval is used a lot without
|
|
// introducing variables. In those cases, we do not want to
|
|
// perform a runtime call for all variables in the scope
|
|
// containing the eval.
|
|
if (var->mode() == DYNAMIC_GLOBAL) {
|
|
EmitLoadGlobalCheckExtensions(var, typeof_state, slow);
|
|
__ jmp(done);
|
|
} else if (var->mode() == DYNAMIC_LOCAL) {
|
|
Variable* local = var->local_if_not_shadowed();
|
|
__ mov(eax, ContextSlotOperandCheckExtensions(local, slow));
|
|
if (local->mode() == CONST ||
|
|
local->mode() == CONST_HARMONY ||
|
|
local->mode() == LET) {
|
|
__ cmp(eax, isolate()->factory()->the_hole_value());
|
|
__ j(not_equal, done);
|
|
if (local->mode() == CONST) {
|
|
__ mov(eax, isolate()->factory()->undefined_value());
|
|
} else { // LET || CONST_HARMONY
|
|
__ push(Immediate(var->name()));
|
|
__ CallRuntime(Runtime::kThrowReferenceError, 1);
|
|
}
|
|
}
|
|
__ jmp(done);
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy) {
|
|
// Record position before possible IC call.
|
|
SetSourcePosition(proxy->position());
|
|
Variable* var = proxy->var();
|
|
|
|
// Three cases: global variables, lookup variables, and all other types of
|
|
// variables.
|
|
switch (var->location()) {
|
|
case Variable::UNALLOCATED: {
|
|
Comment cmnt(masm_, "Global variable");
|
|
// Use inline caching. Variable name is passed in ecx and the global
|
|
// object in eax.
|
|
__ mov(edx, GlobalObjectOperand());
|
|
__ mov(ecx, var->name());
|
|
Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize();
|
|
CallIC(ic, RelocInfo::CODE_TARGET_CONTEXT);
|
|
context()->Plug(eax);
|
|
break;
|
|
}
|
|
|
|
case Variable::PARAMETER:
|
|
case Variable::LOCAL:
|
|
case Variable::CONTEXT: {
|
|
Comment cmnt(masm_, var->IsContextSlot()
|
|
? "Context variable"
|
|
: "Stack variable");
|
|
if (var->binding_needs_init()) {
|
|
// var->scope() may be NULL when the proxy is located in eval code and
|
|
// refers to a potential outside binding. Currently those bindings are
|
|
// always looked up dynamically, i.e. in that case
|
|
// var->location() == LOOKUP.
|
|
// always holds.
|
|
ASSERT(var->scope() != NULL);
|
|
|
|
// Check if the binding really needs an initialization check. The check
|
|
// can be skipped in the following situation: we have a LET or CONST
|
|
// binding in harmony mode, both the Variable and the VariableProxy have
|
|
// the same declaration scope (i.e. they are both in global code, in the
|
|
// same function or in the same eval code) and the VariableProxy is in
|
|
// the source physically located after the initializer of the variable.
|
|
//
|
|
// We cannot skip any initialization checks for CONST in non-harmony
|
|
// mode because const variables may be declared but never initialized:
|
|
// if (false) { const x; }; var y = x;
|
|
//
|
|
// The condition on the declaration scopes is a conservative check for
|
|
// nested functions that access a binding and are called before the
|
|
// binding is initialized:
|
|
// function() { f(); let x = 1; function f() { x = 2; } }
|
|
//
|
|
bool skip_init_check;
|
|
if (var->scope()->DeclarationScope() != scope()->DeclarationScope()) {
|
|
skip_init_check = false;
|
|
} else {
|
|
// Check that we always have valid source position.
|
|
ASSERT(var->initializer_position() != RelocInfo::kNoPosition);
|
|
ASSERT(proxy->position() != RelocInfo::kNoPosition);
|
|
skip_init_check = var->mode() != CONST &&
|
|
var->initializer_position() < proxy->position();
|
|
}
|
|
|
|
if (!skip_init_check) {
|
|
// Let and const need a read barrier.
|
|
Label done;
|
|
GetVar(eax, var);
|
|
__ cmp(eax, isolate()->factory()->the_hole_value());
|
|
__ j(not_equal, &done, Label::kNear);
|
|
if (var->mode() == LET || var->mode() == CONST_HARMONY) {
|
|
// Throw a reference error when using an uninitialized let/const
|
|
// binding in harmony mode.
|
|
__ push(Immediate(var->name()));
|
|
__ CallRuntime(Runtime::kThrowReferenceError, 1);
|
|
} else {
|
|
// Uninitalized const bindings outside of harmony mode are unholed.
|
|
ASSERT(var->mode() == CONST);
|
|
__ mov(eax, isolate()->factory()->undefined_value());
|
|
}
|
|
__ bind(&done);
|
|
context()->Plug(eax);
|
|
break;
|
|
}
|
|
}
|
|
context()->Plug(var);
|
|
break;
|
|
}
|
|
|
|
case Variable::LOOKUP: {
|
|
Label done, slow;
|
|
// Generate code for loading from variables potentially shadowed
|
|
// by eval-introduced variables.
|
|
EmitDynamicLookupFastCase(var, NOT_INSIDE_TYPEOF, &slow, &done);
|
|
__ bind(&slow);
|
|
Comment cmnt(masm_, "Lookup variable");
|
|
__ push(esi); // Context.
|
|
__ push(Immediate(var->name()));
|
|
__ CallRuntime(Runtime::kLoadContextSlot, 2);
|
|
__ bind(&done);
|
|
context()->Plug(eax);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) {
|
|
Comment cmnt(masm_, "[ RegExpLiteral");
|
|
Label materialized;
|
|
// Registers will be used as follows:
|
|
// edi = JS function.
|
|
// ecx = literals array.
|
|
// ebx = regexp literal.
|
|
// eax = regexp literal clone.
|
|
__ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
|
|
__ mov(ecx, FieldOperand(edi, JSFunction::kLiteralsOffset));
|
|
int literal_offset =
|
|
FixedArray::kHeaderSize + expr->literal_index() * kPointerSize;
|
|
__ mov(ebx, FieldOperand(ecx, literal_offset));
|
|
__ cmp(ebx, isolate()->factory()->undefined_value());
|
|
__ j(not_equal, &materialized, Label::kNear);
|
|
|
|
// Create regexp literal using runtime function
|
|
// Result will be in eax.
|
|
__ push(ecx);
|
|
__ push(Immediate(Smi::FromInt(expr->literal_index())));
|
|
__ push(Immediate(expr->pattern()));
|
|
__ push(Immediate(expr->flags()));
|
|
__ CallRuntime(Runtime::kMaterializeRegExpLiteral, 4);
|
|
__ mov(ebx, eax);
|
|
|
|
__ bind(&materialized);
|
|
int size = JSRegExp::kSize + JSRegExp::kInObjectFieldCount * kPointerSize;
|
|
Label allocated, runtime_allocate;
|
|
__ AllocateInNewSpace(size, eax, ecx, edx, &runtime_allocate, TAG_OBJECT);
|
|
__ jmp(&allocated);
|
|
|
|
__ bind(&runtime_allocate);
|
|
__ push(ebx);
|
|
__ push(Immediate(Smi::FromInt(size)));
|
|
__ CallRuntime(Runtime::kAllocateInNewSpace, 1);
|
|
__ pop(ebx);
|
|
|
|
__ bind(&allocated);
|
|
// Copy the content into the newly allocated memory.
|
|
// (Unroll copy loop once for better throughput).
|
|
for (int i = 0; i < size - kPointerSize; i += 2 * kPointerSize) {
|
|
__ mov(edx, FieldOperand(ebx, i));
|
|
__ mov(ecx, FieldOperand(ebx, i + kPointerSize));
|
|
__ mov(FieldOperand(eax, i), edx);
|
|
__ mov(FieldOperand(eax, i + kPointerSize), ecx);
|
|
}
|
|
if ((size % (2 * kPointerSize)) != 0) {
|
|
__ mov(edx, FieldOperand(ebx, size - kPointerSize));
|
|
__ mov(FieldOperand(eax, size - kPointerSize), edx);
|
|
}
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitAccessor(Expression* expression) {
|
|
if (expression == NULL) {
|
|
__ push(Immediate(isolate()->factory()->null_value()));
|
|
} else {
|
|
VisitForStackValue(expression);
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
|
|
Comment cmnt(masm_, "[ ObjectLiteral");
|
|
Handle<FixedArray> constant_properties = expr->constant_properties();
|
|
__ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
|
|
__ push(FieldOperand(edi, JSFunction::kLiteralsOffset));
|
|
__ push(Immediate(Smi::FromInt(expr->literal_index())));
|
|
__ push(Immediate(constant_properties));
|
|
int flags = expr->fast_elements()
|
|
? ObjectLiteral::kFastElements
|
|
: ObjectLiteral::kNoFlags;
|
|
flags |= expr->has_function()
|
|
? ObjectLiteral::kHasFunction
|
|
: ObjectLiteral::kNoFlags;
|
|
__ push(Immediate(Smi::FromInt(flags)));
|
|
int properties_count = constant_properties->length() / 2;
|
|
if (expr->depth() > 1) {
|
|
__ CallRuntime(Runtime::kCreateObjectLiteral, 4);
|
|
} else if (flags != ObjectLiteral::kFastElements ||
|
|
properties_count > FastCloneShallowObjectStub::kMaximumClonedProperties) {
|
|
__ CallRuntime(Runtime::kCreateObjectLiteralShallow, 4);
|
|
} else {
|
|
FastCloneShallowObjectStub stub(properties_count);
|
|
__ CallStub(&stub);
|
|
}
|
|
|
|
// If result_saved is true the result is on top of the stack. If
|
|
// result_saved is false the result is in eax.
|
|
bool result_saved = false;
|
|
|
|
// Mark all computed expressions that are bound to a key that
|
|
// is shadowed by a later occurrence of the same key. For the
|
|
// marked expressions, no store code is emitted.
|
|
expr->CalculateEmitStore(zone());
|
|
|
|
AccessorTable accessor_table(zone());
|
|
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::CONSTANT:
|
|
UNREACHABLE();
|
|
case ObjectLiteral::Property::MATERIALIZED_LITERAL:
|
|
ASSERT(!CompileTimeValue::IsCompileTimeValue(value));
|
|
// Fall through.
|
|
case ObjectLiteral::Property::COMPUTED:
|
|
if (key->handle()->IsSymbol()) {
|
|
if (property->emit_store()) {
|
|
VisitForAccumulatorValue(value);
|
|
__ mov(ecx, Immediate(key->handle()));
|
|
__ mov(edx, Operand(esp, 0));
|
|
Handle<Code> ic = is_classic_mode()
|
|
? isolate()->builtins()->StoreIC_Initialize()
|
|
: isolate()->builtins()->StoreIC_Initialize_Strict();
|
|
CallIC(ic, RelocInfo::CODE_TARGET, key->id());
|
|
PrepareForBailoutForId(key->id(), NO_REGISTERS);
|
|
} else {
|
|
VisitForEffect(value);
|
|
}
|
|
break;
|
|
}
|
|
// Fall through.
|
|
case ObjectLiteral::Property::PROTOTYPE:
|
|
__ push(Operand(esp, 0)); // Duplicate receiver.
|
|
VisitForStackValue(key);
|
|
VisitForStackValue(value);
|
|
if (property->emit_store()) {
|
|
__ push(Immediate(Smi::FromInt(NONE))); // PropertyAttributes
|
|
__ CallRuntime(Runtime::kSetProperty, 4);
|
|
} else {
|
|
__ Drop(3);
|
|
}
|
|
break;
|
|
case ObjectLiteral::Property::GETTER:
|
|
accessor_table.lookup(key)->second->getter = value;
|
|
break;
|
|
case ObjectLiteral::Property::SETTER:
|
|
accessor_table.lookup(key)->second->setter = value;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Emit code to define accessors, using only a single call to the runtime for
|
|
// each pair of corresponding getters and setters.
|
|
for (AccessorTable::Iterator it = accessor_table.begin();
|
|
it != accessor_table.end();
|
|
++it) {
|
|
__ push(Operand(esp, 0)); // Duplicate receiver.
|
|
VisitForStackValue(it->first);
|
|
EmitAccessor(it->second->getter);
|
|
EmitAccessor(it->second->setter);
|
|
__ push(Immediate(Smi::FromInt(NONE)));
|
|
__ CallRuntime(Runtime::kDefineOrRedefineAccessorProperty, 5);
|
|
}
|
|
|
|
if (expr->has_function()) {
|
|
ASSERT(result_saved);
|
|
__ push(Operand(esp, 0));
|
|
__ CallRuntime(Runtime::kToFastProperties, 1);
|
|
}
|
|
|
|
if (result_saved) {
|
|
context()->PlugTOS();
|
|
} else {
|
|
context()->Plug(eax);
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
|
|
Comment cmnt(masm_, "[ ArrayLiteral");
|
|
|
|
ZoneList<Expression*>* subexprs = expr->values();
|
|
int length = subexprs->length();
|
|
Handle<FixedArray> constant_elements = expr->constant_elements();
|
|
ASSERT_EQ(2, constant_elements->length());
|
|
ElementsKind constant_elements_kind =
|
|
static_cast<ElementsKind>(Smi::cast(constant_elements->get(0))->value());
|
|
bool has_constant_fast_elements =
|
|
IsFastObjectElementsKind(constant_elements_kind);
|
|
Handle<FixedArrayBase> constant_elements_values(
|
|
FixedArrayBase::cast(constant_elements->get(1)));
|
|
|
|
__ mov(ebx, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
|
|
__ push(FieldOperand(ebx, JSFunction::kLiteralsOffset));
|
|
__ push(Immediate(Smi::FromInt(expr->literal_index())));
|
|
__ push(Immediate(constant_elements));
|
|
Heap* heap = isolate()->heap();
|
|
if (has_constant_fast_elements &&
|
|
constant_elements_values->map() == heap->fixed_cow_array_map()) {
|
|
// If the elements are already FAST_*_ELEMENTS, the boilerplate cannot
|
|
// change, so it's possible to specialize the stub in advance.
|
|
__ IncrementCounter(isolate()->counters()->cow_arrays_created_stub(), 1);
|
|
FastCloneShallowArrayStub stub(
|
|
FastCloneShallowArrayStub::COPY_ON_WRITE_ELEMENTS,
|
|
length);
|
|
__ CallStub(&stub);
|
|
} else if (expr->depth() > 1) {
|
|
__ CallRuntime(Runtime::kCreateArrayLiteral, 3);
|
|
} else if (length > FastCloneShallowArrayStub::kMaximumClonedLength) {
|
|
__ CallRuntime(Runtime::kCreateArrayLiteralShallow, 3);
|
|
} else {
|
|
ASSERT(IsFastSmiOrObjectElementsKind(constant_elements_kind) ||
|
|
FLAG_smi_only_arrays);
|
|
// If the elements are already FAST_*_ELEMENTS, the boilerplate cannot
|
|
// change, so it's possible to specialize the stub in advance.
|
|
FastCloneShallowArrayStub::Mode mode = has_constant_fast_elements
|
|
? FastCloneShallowArrayStub::CLONE_ELEMENTS
|
|
: FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS;
|
|
FastCloneShallowArrayStub stub(mode, length);
|
|
__ CallStub(&stub);
|
|
}
|
|
|
|
bool result_saved = false; // Is the result saved to the stack?
|
|
|
|
// Emit code to evaluate all the non-constant subexpressions and to store
|
|
// them into the newly cloned array.
|
|
for (int i = 0; i < length; i++) {
|
|
Expression* subexpr = subexprs->at(i);
|
|
// If the subexpression is a literal or a simple materialized literal it
|
|
// is already set in the cloned array.
|
|
if (subexpr->AsLiteral() != NULL ||
|
|
CompileTimeValue::IsCompileTimeValue(subexpr)) {
|
|
continue;
|
|
}
|
|
|
|
if (!result_saved) {
|
|
__ push(eax);
|
|
result_saved = true;
|
|
}
|
|
VisitForAccumulatorValue(subexpr);
|
|
|
|
if (IsFastObjectElementsKind(constant_elements_kind)) {
|
|
// Fast-case array literal with ElementsKind of FAST_*_ELEMENTS, they
|
|
// cannot transition and don't need to call the runtime stub.
|
|
int offset = FixedArray::kHeaderSize + (i * kPointerSize);
|
|
__ mov(ebx, Operand(esp, 0)); // Copy of array literal.
|
|
__ mov(ebx, FieldOperand(ebx, JSObject::kElementsOffset));
|
|
// Store the subexpression value in the array's elements.
|
|
__ mov(FieldOperand(ebx, offset), result_register());
|
|
// Update the write barrier for the array store.
|
|
__ RecordWriteField(ebx, offset, result_register(), ecx,
|
|
kDontSaveFPRegs,
|
|
EMIT_REMEMBERED_SET,
|
|
INLINE_SMI_CHECK);
|
|
} else {
|
|
// Store the subexpression value in the array's elements.
|
|
__ mov(ebx, Operand(esp, 0)); // Copy of array literal.
|
|
__ mov(edi, FieldOperand(ebx, JSObject::kMapOffset));
|
|
__ mov(ecx, Immediate(Smi::FromInt(i)));
|
|
__ mov(edx, Immediate(Smi::FromInt(expr->literal_index())));
|
|
StoreArrayLiteralElementStub stub;
|
|
__ CallStub(&stub);
|
|
}
|
|
|
|
PrepareForBailoutForId(expr->GetIdForElement(i), NO_REGISTERS);
|
|
}
|
|
|
|
if (result_saved) {
|
|
context()->PlugTOS();
|
|
} else {
|
|
context()->Plug(eax);
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitAssignment(Assignment* expr) {
|
|
Comment cmnt(masm_, "[ Assignment");
|
|
// Invalid left-hand sides are rewritten to have a 'throw ReferenceError'
|
|
// on the left-hand side.
|
|
if (!expr->target()->IsValidLeftHandSide()) {
|
|
VisitForEffect(expr->target());
|
|
return;
|
|
}
|
|
|
|
// Left-hand side can only be a property, a global or a (parameter or local)
|
|
// slot.
|
|
enum LhsKind { VARIABLE, NAMED_PROPERTY, KEYED_PROPERTY };
|
|
LhsKind assign_type = VARIABLE;
|
|
Property* property = expr->target()->AsProperty();
|
|
if (property != NULL) {
|
|
assign_type = (property->key()->IsPropertyName())
|
|
? NAMED_PROPERTY
|
|
: KEYED_PROPERTY;
|
|
}
|
|
|
|
// Evaluate LHS expression.
|
|
switch (assign_type) {
|
|
case VARIABLE:
|
|
// Nothing to do here.
|
|
break;
|
|
case NAMED_PROPERTY:
|
|
if (expr->is_compound()) {
|
|
// We need the receiver both on the stack and in edx.
|
|
VisitForStackValue(property->obj());
|
|
__ mov(edx, Operand(esp, 0));
|
|
} else {
|
|
VisitForStackValue(property->obj());
|
|
}
|
|
break;
|
|
case KEYED_PROPERTY: {
|
|
if (expr->is_compound()) {
|
|
VisitForStackValue(property->obj());
|
|
VisitForStackValue(property->key());
|
|
__ mov(edx, Operand(esp, kPointerSize)); // Object.
|
|
__ mov(ecx, Operand(esp, 0)); // Key.
|
|
} else {
|
|
VisitForStackValue(property->obj());
|
|
VisitForStackValue(property->key());
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
// For compound assignments we need another deoptimization point after the
|
|
// variable/property load.
|
|
if (expr->is_compound()) {
|
|
AccumulatorValueContext result_context(this);
|
|
{ AccumulatorValueContext left_operand_context(this);
|
|
switch (assign_type) {
|
|
case VARIABLE:
|
|
EmitVariableLoad(expr->target()->AsVariableProxy());
|
|
PrepareForBailout(expr->target(), TOS_REG);
|
|
break;
|
|
case NAMED_PROPERTY:
|
|
EmitNamedPropertyLoad(property);
|
|
PrepareForBailoutForId(expr->CompoundLoadId(), TOS_REG);
|
|
break;
|
|
case KEYED_PROPERTY:
|
|
EmitKeyedPropertyLoad(property);
|
|
PrepareForBailoutForId(expr->CompoundLoadId(), TOS_REG);
|
|
break;
|
|
}
|
|
}
|
|
|
|
Token::Value op = expr->binary_op();
|
|
__ push(eax); // Left operand goes on the stack.
|
|
VisitForAccumulatorValue(expr->value());
|
|
|
|
OverwriteMode mode = expr->value()->ResultOverwriteAllowed()
|
|
? OVERWRITE_RIGHT
|
|
: NO_OVERWRITE;
|
|
SetSourcePosition(expr->position() + 1);
|
|
if (ShouldInlineSmiCase(op)) {
|
|
EmitInlineSmiBinaryOp(expr->binary_operation(),
|
|
op,
|
|
mode,
|
|
expr->target(),
|
|
expr->value());
|
|
} else {
|
|
EmitBinaryOp(expr->binary_operation(), op, mode);
|
|
}
|
|
|
|
// Deoptimization point in case the binary operation may have side effects.
|
|
PrepareForBailout(expr->binary_operation(), TOS_REG);
|
|
} else {
|
|
VisitForAccumulatorValue(expr->value());
|
|
}
|
|
|
|
// Record source position before possible IC call.
|
|
SetSourcePosition(expr->position());
|
|
|
|
// Store the value.
|
|
switch (assign_type) {
|
|
case VARIABLE:
|
|
EmitVariableAssignment(expr->target()->AsVariableProxy()->var(),
|
|
expr->op());
|
|
PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
|
|
context()->Plug(eax);
|
|
break;
|
|
case NAMED_PROPERTY:
|
|
EmitNamedPropertyAssignment(expr);
|
|
break;
|
|
case KEYED_PROPERTY:
|
|
EmitKeyedPropertyAssignment(expr);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitNamedPropertyLoad(Property* prop) {
|
|
SetSourcePosition(prop->position());
|
|
Literal* key = prop->key()->AsLiteral();
|
|
ASSERT(!key->handle()->IsSmi());
|
|
__ mov(ecx, Immediate(key->handle()));
|
|
Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize();
|
|
CallIC(ic, RelocInfo::CODE_TARGET, prop->id());
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitKeyedPropertyLoad(Property* prop) {
|
|
SetSourcePosition(prop->position());
|
|
Handle<Code> ic = isolate()->builtins()->KeyedLoadIC_Initialize();
|
|
CallIC(ic, RelocInfo::CODE_TARGET, prop->id());
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitInlineSmiBinaryOp(BinaryOperation* expr,
|
|
Token::Value op,
|
|
OverwriteMode mode,
|
|
Expression* left,
|
|
Expression* right) {
|
|
// Do combined smi check of the operands. Left operand is on the
|
|
// stack. Right operand is in eax.
|
|
Label smi_case, done, stub_call;
|
|
__ pop(edx);
|
|
__ mov(ecx, eax);
|
|
__ or_(eax, edx);
|
|
JumpPatchSite patch_site(masm_);
|
|
patch_site.EmitJumpIfSmi(eax, &smi_case, Label::kNear);
|
|
|
|
__ bind(&stub_call);
|
|
__ mov(eax, ecx);
|
|
BinaryOpStub stub(op, mode);
|
|
CallIC(stub.GetCode(), RelocInfo::CODE_TARGET, expr->id());
|
|
patch_site.EmitPatchInfo();
|
|
__ jmp(&done, Label::kNear);
|
|
|
|
// Smi case.
|
|
__ bind(&smi_case);
|
|
__ mov(eax, edx); // Copy left operand in case of a stub call.
|
|
|
|
switch (op) {
|
|
case Token::SAR:
|
|
__ SmiUntag(eax);
|
|
__ SmiUntag(ecx);
|
|
__ sar_cl(eax); // No checks of result necessary
|
|
__ SmiTag(eax);
|
|
break;
|
|
case Token::SHL: {
|
|
Label result_ok;
|
|
__ SmiUntag(eax);
|
|
__ SmiUntag(ecx);
|
|
__ shl_cl(eax);
|
|
// Check that the *signed* result fits in a smi.
|
|
__ cmp(eax, 0xc0000000);
|
|
__ j(positive, &result_ok);
|
|
__ SmiTag(ecx);
|
|
__ jmp(&stub_call);
|
|
__ bind(&result_ok);
|
|
__ SmiTag(eax);
|
|
break;
|
|
}
|
|
case Token::SHR: {
|
|
Label result_ok;
|
|
__ SmiUntag(eax);
|
|
__ SmiUntag(ecx);
|
|
__ shr_cl(eax);
|
|
__ test(eax, Immediate(0xc0000000));
|
|
__ j(zero, &result_ok);
|
|
__ SmiTag(ecx);
|
|
__ jmp(&stub_call);
|
|
__ bind(&result_ok);
|
|
__ SmiTag(eax);
|
|
break;
|
|
}
|
|
case Token::ADD:
|
|
__ add(eax, ecx);
|
|
__ j(overflow, &stub_call);
|
|
break;
|
|
case Token::SUB:
|
|
__ sub(eax, ecx);
|
|
__ j(overflow, &stub_call);
|
|
break;
|
|
case Token::MUL: {
|
|
__ SmiUntag(eax);
|
|
__ imul(eax, ecx);
|
|
__ j(overflow, &stub_call);
|
|
__ test(eax, eax);
|
|
__ j(not_zero, &done, Label::kNear);
|
|
__ mov(ebx, edx);
|
|
__ or_(ebx, ecx);
|
|
__ j(negative, &stub_call);
|
|
break;
|
|
}
|
|
case Token::BIT_OR:
|
|
__ or_(eax, ecx);
|
|
break;
|
|
case Token::BIT_AND:
|
|
__ and_(eax, ecx);
|
|
break;
|
|
case Token::BIT_XOR:
|
|
__ xor_(eax, ecx);
|
|
break;
|
|
default:
|
|
UNREACHABLE();
|
|
}
|
|
|
|
__ bind(&done);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitBinaryOp(BinaryOperation* expr,
|
|
Token::Value op,
|
|
OverwriteMode mode) {
|
|
__ pop(edx);
|
|
BinaryOpStub stub(op, mode);
|
|
JumpPatchSite patch_site(masm_); // unbound, signals no inlined smi code.
|
|
CallIC(stub.GetCode(), RelocInfo::CODE_TARGET, expr->id());
|
|
patch_site.EmitPatchInfo();
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitAssignment(Expression* expr) {
|
|
// Invalid left-hand sides are rewritten to have a 'throw
|
|
// ReferenceError' on the left-hand side.
|
|
if (!expr->IsValidLeftHandSide()) {
|
|
VisitForEffect(expr);
|
|
return;
|
|
}
|
|
|
|
// Left-hand side can only be a property, a global or a (parameter or local)
|
|
// slot.
|
|
enum LhsKind { VARIABLE, NAMED_PROPERTY, KEYED_PROPERTY };
|
|
LhsKind assign_type = VARIABLE;
|
|
Property* prop = expr->AsProperty();
|
|
if (prop != NULL) {
|
|
assign_type = (prop->key()->IsPropertyName())
|
|
? NAMED_PROPERTY
|
|
: KEYED_PROPERTY;
|
|
}
|
|
|
|
switch (assign_type) {
|
|
case VARIABLE: {
|
|
Variable* var = expr->AsVariableProxy()->var();
|
|
EffectContext context(this);
|
|
EmitVariableAssignment(var, Token::ASSIGN);
|
|
break;
|
|
}
|
|
case NAMED_PROPERTY: {
|
|
__ push(eax); // Preserve value.
|
|
VisitForAccumulatorValue(prop->obj());
|
|
__ mov(edx, eax);
|
|
__ pop(eax); // Restore value.
|
|
__ mov(ecx, prop->key()->AsLiteral()->handle());
|
|
Handle<Code> ic = is_classic_mode()
|
|
? isolate()->builtins()->StoreIC_Initialize()
|
|
: isolate()->builtins()->StoreIC_Initialize_Strict();
|
|
CallIC(ic);
|
|
break;
|
|
}
|
|
case KEYED_PROPERTY: {
|
|
__ push(eax); // Preserve value.
|
|
VisitForStackValue(prop->obj());
|
|
VisitForAccumulatorValue(prop->key());
|
|
__ mov(ecx, eax);
|
|
__ pop(edx); // Receiver.
|
|
__ pop(eax); // Restore value.
|
|
Handle<Code> ic = is_classic_mode()
|
|
? isolate()->builtins()->KeyedStoreIC_Initialize()
|
|
: isolate()->builtins()->KeyedStoreIC_Initialize_Strict();
|
|
CallIC(ic);
|
|
break;
|
|
}
|
|
}
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitVariableAssignment(Variable* var,
|
|
Token::Value op) {
|
|
if (var->IsUnallocated()) {
|
|
// Global var, const, or let.
|
|
__ mov(ecx, var->name());
|
|
__ mov(edx, GlobalObjectOperand());
|
|
Handle<Code> ic = is_classic_mode()
|
|
? isolate()->builtins()->StoreIC_Initialize()
|
|
: isolate()->builtins()->StoreIC_Initialize_Strict();
|
|
CallIC(ic, RelocInfo::CODE_TARGET_CONTEXT);
|
|
|
|
} else if (op == Token::INIT_CONST) {
|
|
// Const initializers need a write barrier.
|
|
ASSERT(!var->IsParameter()); // No const parameters.
|
|
if (var->IsStackLocal()) {
|
|
Label skip;
|
|
__ mov(edx, StackOperand(var));
|
|
__ cmp(edx, isolate()->factory()->the_hole_value());
|
|
__ j(not_equal, &skip);
|
|
__ mov(StackOperand(var), eax);
|
|
__ bind(&skip);
|
|
} else {
|
|
ASSERT(var->IsContextSlot() || var->IsLookupSlot());
|
|
// Like var declarations, const declarations are hoisted to function
|
|
// scope. However, unlike var initializers, const initializers are
|
|
// able to drill a hole to that function context, even from inside a
|
|
// 'with' context. We thus bypass the normal static scope lookup for
|
|
// var->IsContextSlot().
|
|
__ push(eax);
|
|
__ push(esi);
|
|
__ push(Immediate(var->name()));
|
|
__ CallRuntime(Runtime::kInitializeConstContextSlot, 3);
|
|
}
|
|
|
|
} else if (var->mode() == LET && op != Token::INIT_LET) {
|
|
// Non-initializing assignment to let variable needs a write barrier.
|
|
if (var->IsLookupSlot()) {
|
|
__ push(eax); // Value.
|
|
__ push(esi); // Context.
|
|
__ push(Immediate(var->name()));
|
|
__ push(Immediate(Smi::FromInt(language_mode())));
|
|
__ CallRuntime(Runtime::kStoreContextSlot, 4);
|
|
} else {
|
|
ASSERT(var->IsStackAllocated() || var->IsContextSlot());
|
|
Label assign;
|
|
MemOperand location = VarOperand(var, ecx);
|
|
__ mov(edx, location);
|
|
__ cmp(edx, isolate()->factory()->the_hole_value());
|
|
__ j(not_equal, &assign, Label::kNear);
|
|
__ push(Immediate(var->name()));
|
|
__ CallRuntime(Runtime::kThrowReferenceError, 1);
|
|
__ bind(&assign);
|
|
__ mov(location, eax);
|
|
if (var->IsContextSlot()) {
|
|
__ mov(edx, eax);
|
|
int offset = Context::SlotOffset(var->index());
|
|
__ RecordWriteContextSlot(ecx, offset, edx, ebx, kDontSaveFPRegs);
|
|
}
|
|
}
|
|
|
|
} else if (!var->is_const_mode() || op == Token::INIT_CONST_HARMONY) {
|
|
// Assignment to var or initializing assignment to let/const
|
|
// in harmony mode.
|
|
if (var->IsStackAllocated() || var->IsContextSlot()) {
|
|
MemOperand location = VarOperand(var, ecx);
|
|
if (FLAG_debug_code && op == Token::INIT_LET) {
|
|
// Check for an uninitialized let binding.
|
|
__ mov(edx, location);
|
|
__ cmp(edx, isolate()->factory()->the_hole_value());
|
|
__ Check(equal, "Let binding re-initialization.");
|
|
}
|
|
// Perform the assignment.
|
|
__ mov(location, eax);
|
|
if (var->IsContextSlot()) {
|
|
__ mov(edx, eax);
|
|
int offset = Context::SlotOffset(var->index());
|
|
__ RecordWriteContextSlot(ecx, offset, edx, ebx, kDontSaveFPRegs);
|
|
}
|
|
} else {
|
|
ASSERT(var->IsLookupSlot());
|
|
__ push(eax); // Value.
|
|
__ push(esi); // Context.
|
|
__ push(Immediate(var->name()));
|
|
__ push(Immediate(Smi::FromInt(language_mode())));
|
|
__ CallRuntime(Runtime::kStoreContextSlot, 4);
|
|
}
|
|
}
|
|
// Non-initializing assignments to consts are ignored.
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) {
|
|
// Assignment to a property, using a named store IC.
|
|
// eax : value
|
|
// esp[0] : receiver
|
|
|
|
Property* prop = expr->target()->AsProperty();
|
|
ASSERT(prop != NULL);
|
|
ASSERT(prop->key()->AsLiteral() != NULL);
|
|
|
|
// If the assignment starts a block of assignments to the same object,
|
|
// change to slow case to avoid the quadratic behavior of repeatedly
|
|
// adding fast properties.
|
|
if (expr->starts_initialization_block()) {
|
|
__ push(result_register());
|
|
__ push(Operand(esp, kPointerSize)); // Receiver is now under value.
|
|
__ CallRuntime(Runtime::kToSlowProperties, 1);
|
|
__ pop(result_register());
|
|
}
|
|
|
|
// Record source code position before IC call.
|
|
SetSourcePosition(expr->position());
|
|
__ mov(ecx, prop->key()->AsLiteral()->handle());
|
|
if (expr->ends_initialization_block()) {
|
|
__ mov(edx, Operand(esp, 0));
|
|
} else {
|
|
__ pop(edx);
|
|
}
|
|
Handle<Code> ic = is_classic_mode()
|
|
? isolate()->builtins()->StoreIC_Initialize()
|
|
: isolate()->builtins()->StoreIC_Initialize_Strict();
|
|
CallIC(ic, RelocInfo::CODE_TARGET, expr->id());
|
|
|
|
// If the assignment ends an initialization block, revert to fast case.
|
|
if (expr->ends_initialization_block()) {
|
|
__ push(eax); // Result of assignment, saved even if not needed.
|
|
__ push(Operand(esp, kPointerSize)); // Receiver is under value.
|
|
__ CallRuntime(Runtime::kToFastProperties, 1);
|
|
__ pop(eax);
|
|
__ Drop(1);
|
|
}
|
|
PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) {
|
|
// Assignment to a property, using a keyed store IC.
|
|
// eax : value
|
|
// esp[0] : key
|
|
// esp[kPointerSize] : receiver
|
|
|
|
// If the assignment starts a block of assignments to the same object,
|
|
// change to slow case to avoid the quadratic behavior of repeatedly
|
|
// adding fast properties.
|
|
if (expr->starts_initialization_block()) {
|
|
__ push(result_register());
|
|
// Receiver is now under the key and value.
|
|
__ push(Operand(esp, 2 * kPointerSize));
|
|
__ CallRuntime(Runtime::kToSlowProperties, 1);
|
|
__ pop(result_register());
|
|
}
|
|
|
|
__ pop(ecx); // Key.
|
|
if (expr->ends_initialization_block()) {
|
|
__ mov(edx, Operand(esp, 0)); // Leave receiver on the stack for later.
|
|
} else {
|
|
__ pop(edx);
|
|
}
|
|
// Record source code position before IC call.
|
|
SetSourcePosition(expr->position());
|
|
Handle<Code> ic = is_classic_mode()
|
|
? isolate()->builtins()->KeyedStoreIC_Initialize()
|
|
: isolate()->builtins()->KeyedStoreIC_Initialize_Strict();
|
|
CallIC(ic, RelocInfo::CODE_TARGET, expr->id());
|
|
|
|
// If the assignment ends an initialization block, revert to fast case.
|
|
if (expr->ends_initialization_block()) {
|
|
__ pop(edx);
|
|
__ push(eax); // Result of assignment, saved even if not needed.
|
|
__ push(edx);
|
|
__ CallRuntime(Runtime::kToFastProperties, 1);
|
|
__ pop(eax);
|
|
}
|
|
|
|
PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitProperty(Property* expr) {
|
|
Comment cmnt(masm_, "[ Property");
|
|
Expression* key = expr->key();
|
|
|
|
if (key->IsPropertyName()) {
|
|
VisitForAccumulatorValue(expr->obj());
|
|
__ mov(edx, result_register());
|
|
EmitNamedPropertyLoad(expr);
|
|
context()->Plug(eax);
|
|
} else {
|
|
VisitForStackValue(expr->obj());
|
|
VisitForAccumulatorValue(expr->key());
|
|
__ pop(edx); // Object.
|
|
__ mov(ecx, result_register()); // Key.
|
|
EmitKeyedPropertyLoad(expr);
|
|
context()->Plug(eax);
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::CallIC(Handle<Code> code,
|
|
RelocInfo::Mode rmode,
|
|
unsigned ast_id) {
|
|
ic_total_count_++;
|
|
__ call(code, rmode, ast_id);
|
|
}
|
|
|
|
|
|
|
|
|
|
void FullCodeGenerator::EmitCallWithIC(Call* expr,
|
|
Handle<Object> name,
|
|
RelocInfo::Mode mode) {
|
|
// Code common for calls using the IC.
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
int arg_count = args->length();
|
|
{ PreservePositionScope scope(masm()->positions_recorder());
|
|
for (int i = 0; i < arg_count; i++) {
|
|
VisitForStackValue(args->at(i));
|
|
}
|
|
__ Set(ecx, Immediate(name));
|
|
}
|
|
// Record source position of the IC call.
|
|
SetSourcePosition(expr->position());
|
|
Handle<Code> ic =
|
|
isolate()->stub_cache()->ComputeCallInitialize(arg_count, mode);
|
|
CallIC(ic, mode, expr->id());
|
|
RecordJSReturnSite(expr);
|
|
// Restore context register.
|
|
__ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitKeyedCallWithIC(Call* expr,
|
|
Expression* key) {
|
|
// Load the key.
|
|
VisitForAccumulatorValue(key);
|
|
|
|
// Swap the name of the function and the receiver on the stack to follow
|
|
// the calling convention for call ICs.
|
|
__ pop(ecx);
|
|
__ push(eax);
|
|
__ push(ecx);
|
|
|
|
// Load the arguments.
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
int arg_count = args->length();
|
|
{ PreservePositionScope scope(masm()->positions_recorder());
|
|
for (int i = 0; i < arg_count; i++) {
|
|
VisitForStackValue(args->at(i));
|
|
}
|
|
}
|
|
// Record source position of the IC call.
|
|
SetSourcePosition(expr->position());
|
|
Handle<Code> ic =
|
|
isolate()->stub_cache()->ComputeKeyedCallInitialize(arg_count);
|
|
__ mov(ecx, Operand(esp, (arg_count + 1) * kPointerSize)); // Key.
|
|
CallIC(ic, RelocInfo::CODE_TARGET, expr->id());
|
|
RecordJSReturnSite(expr);
|
|
// Restore context register.
|
|
__ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
|
|
context()->DropAndPlug(1, eax); // Drop the key still on the stack.
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitCallWithStub(Call* expr, CallFunctionFlags flags) {
|
|
// Code common for calls using the call stub.
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
int arg_count = args->length();
|
|
{ PreservePositionScope scope(masm()->positions_recorder());
|
|
for (int i = 0; i < arg_count; i++) {
|
|
VisitForStackValue(args->at(i));
|
|
}
|
|
}
|
|
// Record source position for debugger.
|
|
SetSourcePosition(expr->position());
|
|
|
|
// Record call targets in unoptimized code, but not in the snapshot.
|
|
if (!Serializer::enabled()) {
|
|
flags = static_cast<CallFunctionFlags>(flags | RECORD_CALL_TARGET);
|
|
Handle<Object> uninitialized =
|
|
TypeFeedbackCells::UninitializedSentinel(isolate());
|
|
Handle<JSGlobalPropertyCell> cell =
|
|
isolate()->factory()->NewJSGlobalPropertyCell(uninitialized);
|
|
RecordTypeFeedbackCell(expr->id(), cell);
|
|
__ mov(ebx, cell);
|
|
}
|
|
|
|
CallFunctionStub stub(arg_count, flags);
|
|
__ mov(edi, Operand(esp, (arg_count + 1) * kPointerSize));
|
|
__ CallStub(&stub, expr->id());
|
|
|
|
RecordJSReturnSite(expr);
|
|
// Restore context register.
|
|
__ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
|
|
context()->DropAndPlug(1, eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) {
|
|
// Push copy of the first argument or undefined if it doesn't exist.
|
|
if (arg_count > 0) {
|
|
__ push(Operand(esp, arg_count * kPointerSize));
|
|
} else {
|
|
__ push(Immediate(isolate()->factory()->undefined_value()));
|
|
}
|
|
|
|
// Push the receiver of the enclosing function.
|
|
__ push(Operand(ebp, (2 + info_->scope()->num_parameters()) * kPointerSize));
|
|
// Push the language mode.
|
|
__ push(Immediate(Smi::FromInt(language_mode())));
|
|
|
|
// Push the start position of the scope the calls resides in.
|
|
__ push(Immediate(Smi::FromInt(scope()->start_position())));
|
|
|
|
// Do the runtime call.
|
|
__ CallRuntime(Runtime::kResolvePossiblyDirectEval, 5);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitCall(Call* expr) {
|
|
#ifdef DEBUG
|
|
// We want to verify that RecordJSReturnSite gets called on all paths
|
|
// through this function. Avoid early returns.
|
|
expr->return_is_recorded_ = false;
|
|
#endif
|
|
|
|
Comment cmnt(masm_, "[ Call");
|
|
Expression* callee = expr->expression();
|
|
VariableProxy* proxy = callee->AsVariableProxy();
|
|
Property* property = callee->AsProperty();
|
|
|
|
if (proxy != NULL && proxy->var()->is_possibly_eval()) {
|
|
// In a call to eval, we first call %ResolvePossiblyDirectEval to
|
|
// resolve the function we need to call and the receiver of the call.
|
|
// Then we call the resolved function using the given arguments.
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
int arg_count = args->length();
|
|
{ PreservePositionScope pos_scope(masm()->positions_recorder());
|
|
VisitForStackValue(callee);
|
|
// Reserved receiver slot.
|
|
__ push(Immediate(isolate()->factory()->undefined_value()));
|
|
// Push the arguments.
|
|
for (int i = 0; i < arg_count; i++) {
|
|
VisitForStackValue(args->at(i));
|
|
}
|
|
|
|
// Push a copy of the function (found below the arguments) and
|
|
// resolve eval.
|
|
__ push(Operand(esp, (arg_count + 1) * kPointerSize));
|
|
EmitResolvePossiblyDirectEval(arg_count);
|
|
|
|
// The runtime call returns a pair of values in eax (function) and
|
|
// edx (receiver). Touch up the stack with the right values.
|
|
__ mov(Operand(esp, (arg_count + 0) * kPointerSize), edx);
|
|
__ mov(Operand(esp, (arg_count + 1) * kPointerSize), eax);
|
|
}
|
|
// Record source position for debugger.
|
|
SetSourcePosition(expr->position());
|
|
CallFunctionStub stub(arg_count, RECEIVER_MIGHT_BE_IMPLICIT);
|
|
__ mov(edi, Operand(esp, (arg_count + 1) * kPointerSize));
|
|
__ CallStub(&stub);
|
|
RecordJSReturnSite(expr);
|
|
// Restore context register.
|
|
__ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
|
|
context()->DropAndPlug(1, eax);
|
|
|
|
} else if (proxy != NULL && proxy->var()->IsUnallocated()) {
|
|
// Push global object as receiver for the call IC.
|
|
__ push(GlobalObjectOperand());
|
|
EmitCallWithIC(expr, proxy->name(), RelocInfo::CODE_TARGET_CONTEXT);
|
|
|
|
} else if (proxy != NULL && proxy->var()->IsLookupSlot()) {
|
|
// Call to a lookup slot (dynamically introduced variable).
|
|
Label slow, done;
|
|
{ PreservePositionScope scope(masm()->positions_recorder());
|
|
// Generate code for loading from variables potentially shadowed by
|
|
// eval-introduced variables.
|
|
EmitDynamicLookupFastCase(proxy->var(), NOT_INSIDE_TYPEOF, &slow, &done);
|
|
}
|
|
__ bind(&slow);
|
|
// Call the runtime to find the function to call (returned in eax) and
|
|
// the object holding it (returned in edx).
|
|
__ push(context_register());
|
|
__ push(Immediate(proxy->name()));
|
|
__ CallRuntime(Runtime::kLoadContextSlot, 2);
|
|
__ push(eax); // Function.
|
|
__ push(edx); // Receiver.
|
|
|
|
// If fast case code has been generated, emit code to push the function
|
|
// and receiver and have the slow path jump around this code.
|
|
if (done.is_linked()) {
|
|
Label call;
|
|
__ jmp(&call, Label::kNear);
|
|
__ bind(&done);
|
|
// Push function.
|
|
__ push(eax);
|
|
// The receiver is implicitly the global receiver. Indicate this by
|
|
// passing the hole to the call function stub.
|
|
__ push(Immediate(isolate()->factory()->the_hole_value()));
|
|
__ bind(&call);
|
|
}
|
|
|
|
// The receiver is either the global receiver or an object found by
|
|
// LoadContextSlot. That object could be the hole if the receiver is
|
|
// implicitly the global object.
|
|
EmitCallWithStub(expr, RECEIVER_MIGHT_BE_IMPLICIT);
|
|
|
|
} else if (property != NULL) {
|
|
{ PreservePositionScope scope(masm()->positions_recorder());
|
|
VisitForStackValue(property->obj());
|
|
}
|
|
if (property->key()->IsPropertyName()) {
|
|
EmitCallWithIC(expr,
|
|
property->key()->AsLiteral()->handle(),
|
|
RelocInfo::CODE_TARGET);
|
|
} else {
|
|
EmitKeyedCallWithIC(expr, property->key());
|
|
}
|
|
|
|
} else {
|
|
// Call to an arbitrary expression not handled specially above.
|
|
{ PreservePositionScope scope(masm()->positions_recorder());
|
|
VisitForStackValue(callee);
|
|
}
|
|
// Load global receiver object.
|
|
__ mov(ebx, GlobalObjectOperand());
|
|
__ push(FieldOperand(ebx, GlobalObject::kGlobalReceiverOffset));
|
|
// Emit function call.
|
|
EmitCallWithStub(expr, NO_CALL_FUNCTION_FLAGS);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
// RecordJSReturnSite should have been called.
|
|
ASSERT(expr->return_is_recorded_);
|
|
#endif
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitCallNew(CallNew* expr) {
|
|
Comment cmnt(masm_, "[ CallNew");
|
|
// According to ECMA-262, section 11.2.2, page 44, the function
|
|
// expression in new calls must be evaluated before the
|
|
// arguments.
|
|
|
|
// Push constructor on the stack. If it's not a function it's used as
|
|
// receiver for CALL_NON_FUNCTION, otherwise the value on the stack is
|
|
// ignored.
|
|
VisitForStackValue(expr->expression());
|
|
|
|
// Push the arguments ("left-to-right") on the stack.
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
int arg_count = args->length();
|
|
for (int i = 0; i < arg_count; i++) {
|
|
VisitForStackValue(args->at(i));
|
|
}
|
|
|
|
// Call the construct call builtin that handles allocation and
|
|
// constructor invocation.
|
|
SetSourcePosition(expr->position());
|
|
|
|
// Load function and argument count into edi and eax.
|
|
__ Set(eax, Immediate(arg_count));
|
|
__ mov(edi, Operand(esp, arg_count * kPointerSize));
|
|
|
|
// Record call targets in unoptimized code, but not in the snapshot.
|
|
CallFunctionFlags flags;
|
|
if (!Serializer::enabled()) {
|
|
flags = RECORD_CALL_TARGET;
|
|
Handle<Object> uninitialized =
|
|
TypeFeedbackCells::UninitializedSentinel(isolate());
|
|
Handle<JSGlobalPropertyCell> cell =
|
|
isolate()->factory()->NewJSGlobalPropertyCell(uninitialized);
|
|
RecordTypeFeedbackCell(expr->id(), cell);
|
|
__ mov(ebx, cell);
|
|
} else {
|
|
flags = NO_CALL_FUNCTION_FLAGS;
|
|
}
|
|
|
|
CallConstructStub stub(flags);
|
|
__ call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
|
|
PrepareForBailoutForId(expr->ReturnId(), TOS_REG);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitIsSmi(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
|
|
VisitForAccumulatorValue(args->at(0));
|
|
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
__ test(eax, Immediate(kSmiTagMask));
|
|
Split(zero, if_true, if_false, fall_through);
|
|
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitIsNonNegativeSmi(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
|
|
VisitForAccumulatorValue(args->at(0));
|
|
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
__ test(eax, Immediate(kSmiTagMask | 0x80000000));
|
|
Split(zero, if_true, if_false, fall_through);
|
|
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitIsObject(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
|
|
VisitForAccumulatorValue(args->at(0));
|
|
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
__ JumpIfSmi(eax, if_false);
|
|
__ cmp(eax, isolate()->factory()->null_value());
|
|
__ j(equal, if_true);
|
|
__ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset));
|
|
// Undetectable objects behave like undefined when tested with typeof.
|
|
__ movzx_b(ecx, FieldOperand(ebx, Map::kBitFieldOffset));
|
|
__ test(ecx, Immediate(1 << Map::kIsUndetectable));
|
|
__ j(not_zero, if_false);
|
|
__ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceTypeOffset));
|
|
__ cmp(ecx, FIRST_NONCALLABLE_SPEC_OBJECT_TYPE);
|
|
__ j(below, if_false);
|
|
__ cmp(ecx, LAST_NONCALLABLE_SPEC_OBJECT_TYPE);
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
Split(below_equal, if_true, if_false, fall_through);
|
|
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitIsSpecObject(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
|
|
VisitForAccumulatorValue(args->at(0));
|
|
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
__ JumpIfSmi(eax, if_false);
|
|
__ CmpObjectType(eax, FIRST_SPEC_OBJECT_TYPE, ebx);
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
Split(above_equal, if_true, if_false, fall_through);
|
|
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitIsUndetectableObject(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
|
|
VisitForAccumulatorValue(args->at(0));
|
|
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
__ JumpIfSmi(eax, if_false);
|
|
__ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset));
|
|
__ movzx_b(ebx, FieldOperand(ebx, Map::kBitFieldOffset));
|
|
__ test(ebx, Immediate(1 << Map::kIsUndetectable));
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
Split(not_zero, if_true, if_false, fall_through);
|
|
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
|
|
CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
|
|
VisitForAccumulatorValue(args->at(0));
|
|
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
if (FLAG_debug_code) __ AbortIfSmi(eax);
|
|
|
|
// Check whether this map has already been checked to be safe for default
|
|
// valueOf.
|
|
__ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset));
|
|
__ test_b(FieldOperand(ebx, Map::kBitField2Offset),
|
|
1 << Map::kStringWrapperSafeForDefaultValueOf);
|
|
__ j(not_zero, if_true);
|
|
|
|
// Check for fast case object. Return false for slow case objects.
|
|
__ mov(ecx, FieldOperand(eax, JSObject::kPropertiesOffset));
|
|
__ mov(ecx, FieldOperand(ecx, HeapObject::kMapOffset));
|
|
__ cmp(ecx, FACTORY->hash_table_map());
|
|
__ j(equal, if_false);
|
|
|
|
// Look for valueOf symbol in the descriptor array, and indicate false if
|
|
// found. The type is not checked, so if it is a transition it is a false
|
|
// negative.
|
|
__ LoadInstanceDescriptors(ebx, ebx);
|
|
__ mov(ecx, FieldOperand(ebx, FixedArray::kLengthOffset));
|
|
// ebx: descriptor array
|
|
// ecx: length of descriptor array
|
|
// Calculate the end of the descriptor array.
|
|
STATIC_ASSERT(kSmiTag == 0);
|
|
STATIC_ASSERT(kSmiTagSize == 1);
|
|
STATIC_ASSERT(kPointerSize == 4);
|
|
__ lea(ecx, Operand(ebx, ecx, times_2, FixedArray::kHeaderSize));
|
|
// Calculate location of the first key name.
|
|
__ add(ebx,
|
|
Immediate(FixedArray::kHeaderSize +
|
|
DescriptorArray::kFirstIndex * kPointerSize));
|
|
// Loop through all the keys in the descriptor array. If one of these is the
|
|
// symbol valueOf the result is false.
|
|
Label entry, loop;
|
|
__ jmp(&entry);
|
|
__ bind(&loop);
|
|
__ mov(edx, FieldOperand(ebx, 0));
|
|
__ cmp(edx, FACTORY->value_of_symbol());
|
|
__ j(equal, if_false);
|
|
__ add(ebx, Immediate(kPointerSize));
|
|
__ bind(&entry);
|
|
__ cmp(ebx, ecx);
|
|
__ j(not_equal, &loop);
|
|
|
|
// Reload map as register ebx was used as temporary above.
|
|
__ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset));
|
|
|
|
// If a valueOf property is not found on the object check that it's
|
|
// prototype is the un-modified String prototype. If not result is false.
|
|
__ mov(ecx, FieldOperand(ebx, Map::kPrototypeOffset));
|
|
__ JumpIfSmi(ecx, if_false);
|
|
__ mov(ecx, FieldOperand(ecx, HeapObject::kMapOffset));
|
|
__ mov(edx, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX)));
|
|
__ mov(edx,
|
|
FieldOperand(edx, GlobalObject::kGlobalContextOffset));
|
|
__ cmp(ecx,
|
|
ContextOperand(edx,
|
|
Context::STRING_FUNCTION_PROTOTYPE_MAP_INDEX));
|
|
__ j(not_equal, if_false);
|
|
// Set the bit in the map to indicate that it has been checked safe for
|
|
// default valueOf and set true result.
|
|
__ or_(FieldOperand(ebx, Map::kBitField2Offset),
|
|
Immediate(1 << Map::kStringWrapperSafeForDefaultValueOf));
|
|
__ jmp(if_true);
|
|
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitIsFunction(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
|
|
VisitForAccumulatorValue(args->at(0));
|
|
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
__ JumpIfSmi(eax, if_false);
|
|
__ CmpObjectType(eax, JS_FUNCTION_TYPE, ebx);
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
Split(equal, if_true, if_false, fall_through);
|
|
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitIsArray(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
|
|
VisitForAccumulatorValue(args->at(0));
|
|
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
__ JumpIfSmi(eax, if_false);
|
|
__ CmpObjectType(eax, JS_ARRAY_TYPE, ebx);
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
Split(equal, if_true, if_false, fall_through);
|
|
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitIsRegExp(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
|
|
VisitForAccumulatorValue(args->at(0));
|
|
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
__ JumpIfSmi(eax, if_false);
|
|
__ CmpObjectType(eax, JS_REGEXP_TYPE, ebx);
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
Split(equal, if_true, if_false, fall_through);
|
|
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
|
|
void FullCodeGenerator::EmitIsConstructCall(CallRuntime* expr) {
|
|
ASSERT(expr->arguments()->length() == 0);
|
|
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
// Get the frame pointer for the calling frame.
|
|
__ mov(eax, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
|
|
|
|
// Skip the arguments adaptor frame if it exists.
|
|
Label check_frame_marker;
|
|
__ cmp(Operand(eax, StandardFrameConstants::kContextOffset),
|
|
Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
|
|
__ j(not_equal, &check_frame_marker);
|
|
__ mov(eax, Operand(eax, StandardFrameConstants::kCallerFPOffset));
|
|
|
|
// Check the marker in the calling frame.
|
|
__ bind(&check_frame_marker);
|
|
__ cmp(Operand(eax, StandardFrameConstants::kMarkerOffset),
|
|
Immediate(Smi::FromInt(StackFrame::CONSTRUCT)));
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
Split(equal, if_true, if_false, fall_through);
|
|
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitObjectEquals(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 2);
|
|
|
|
// Load the two objects into registers and perform the comparison.
|
|
VisitForStackValue(args->at(0));
|
|
VisitForAccumulatorValue(args->at(1));
|
|
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
__ pop(ebx);
|
|
__ cmp(eax, ebx);
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
Split(equal, if_true, if_false, fall_through);
|
|
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitArguments(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
|
|
// ArgumentsAccessStub expects the key in edx and the formal
|
|
// parameter count in eax.
|
|
VisitForAccumulatorValue(args->at(0));
|
|
__ mov(edx, eax);
|
|
__ Set(eax, Immediate(Smi::FromInt(info_->scope()->num_parameters())));
|
|
ArgumentsAccessStub stub(ArgumentsAccessStub::READ_ELEMENT);
|
|
__ CallStub(&stub);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitArgumentsLength(CallRuntime* expr) {
|
|
ASSERT(expr->arguments()->length() == 0);
|
|
|
|
Label exit;
|
|
// Get the number of formal parameters.
|
|
__ Set(eax, Immediate(Smi::FromInt(info_->scope()->num_parameters())));
|
|
|
|
// Check if the calling frame is an arguments adaptor frame.
|
|
__ mov(ebx, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
|
|
__ cmp(Operand(ebx, StandardFrameConstants::kContextOffset),
|
|
Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
|
|
__ j(not_equal, &exit);
|
|
|
|
// Arguments adaptor case: Read the arguments length from the
|
|
// adaptor frame.
|
|
__ mov(eax, Operand(ebx, ArgumentsAdaptorFrameConstants::kLengthOffset));
|
|
|
|
__ bind(&exit);
|
|
if (FLAG_debug_code) __ AbortIfNotSmi(eax);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitClassOf(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
Label done, null, function, non_function_constructor;
|
|
|
|
VisitForAccumulatorValue(args->at(0));
|
|
|
|
// If the object is a smi, we return null.
|
|
__ JumpIfSmi(eax, &null);
|
|
|
|
// Check that the object is a JS object but take special care of JS
|
|
// functions to make sure they have 'Function' as their class.
|
|
// Assume that there are only two callable types, and one of them is at
|
|
// either end of the type range for JS object types. Saves extra comparisons.
|
|
STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2);
|
|
__ CmpObjectType(eax, FIRST_SPEC_OBJECT_TYPE, eax);
|
|
// Map is now in eax.
|
|
__ j(below, &null);
|
|
STATIC_ASSERT(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE ==
|
|
FIRST_SPEC_OBJECT_TYPE + 1);
|
|
__ j(equal, &function);
|
|
|
|
__ CmpInstanceType(eax, LAST_SPEC_OBJECT_TYPE);
|
|
STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE ==
|
|
LAST_SPEC_OBJECT_TYPE - 1);
|
|
__ j(equal, &function);
|
|
// Assume that there is no larger type.
|
|
STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE == LAST_TYPE - 1);
|
|
|
|
// Check if the constructor in the map is a JS function.
|
|
__ mov(eax, FieldOperand(eax, Map::kConstructorOffset));
|
|
__ CmpObjectType(eax, JS_FUNCTION_TYPE, ebx);
|
|
__ j(not_equal, &non_function_constructor);
|
|
|
|
// eax now contains the constructor function. Grab the
|
|
// instance class name from there.
|
|
__ mov(eax, FieldOperand(eax, JSFunction::kSharedFunctionInfoOffset));
|
|
__ mov(eax, FieldOperand(eax, SharedFunctionInfo::kInstanceClassNameOffset));
|
|
__ jmp(&done);
|
|
|
|
// Functions have class 'Function'.
|
|
__ bind(&function);
|
|
__ mov(eax, isolate()->factory()->function_class_symbol());
|
|
__ jmp(&done);
|
|
|
|
// Objects with a non-function constructor have class 'Object'.
|
|
__ bind(&non_function_constructor);
|
|
__ mov(eax, isolate()->factory()->Object_symbol());
|
|
__ jmp(&done);
|
|
|
|
// Non-JS objects have class null.
|
|
__ bind(&null);
|
|
__ mov(eax, isolate()->factory()->null_value());
|
|
|
|
// All done.
|
|
__ bind(&done);
|
|
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitLog(CallRuntime* expr) {
|
|
// Conditionally generate a log call.
|
|
// Args:
|
|
// 0 (literal string): The type of logging (corresponds to the flags).
|
|
// This is used to determine whether or not to generate the log call.
|
|
// 1 (string): Format string. Access the string at argument index 2
|
|
// with '%2s' (see Logger::LogRuntime for all the formats).
|
|
// 2 (array): Arguments to the format string.
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT_EQ(args->length(), 3);
|
|
if (CodeGenerator::ShouldGenerateLog(args->at(0))) {
|
|
VisitForStackValue(args->at(1));
|
|
VisitForStackValue(args->at(2));
|
|
__ CallRuntime(Runtime::kLog, 2);
|
|
}
|
|
// Finally, we're expected to leave a value on the top of the stack.
|
|
__ mov(eax, isolate()->factory()->undefined_value());
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitRandomHeapNumber(CallRuntime* expr) {
|
|
ASSERT(expr->arguments()->length() == 0);
|
|
|
|
Label slow_allocate_heapnumber;
|
|
Label heapnumber_allocated;
|
|
|
|
__ AllocateHeapNumber(edi, ebx, ecx, &slow_allocate_heapnumber);
|
|
__ jmp(&heapnumber_allocated);
|
|
|
|
__ bind(&slow_allocate_heapnumber);
|
|
// Allocate a heap number.
|
|
__ CallRuntime(Runtime::kNumberAlloc, 0);
|
|
__ mov(edi, eax);
|
|
|
|
__ bind(&heapnumber_allocated);
|
|
|
|
__ PrepareCallCFunction(1, ebx);
|
|
__ mov(eax, ContextOperand(context_register(), Context::GLOBAL_INDEX));
|
|
__ mov(eax, FieldOperand(eax, GlobalObject::kGlobalContextOffset));
|
|
__ mov(Operand(esp, 0), eax);
|
|
__ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1);
|
|
|
|
// Convert 32 random bits in eax to 0.(32 random bits) in a double
|
|
// by computing:
|
|
// ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)).
|
|
// This is implemented on both SSE2 and FPU.
|
|
if (CpuFeatures::IsSupported(SSE2)) {
|
|
CpuFeatures::Scope fscope(SSE2);
|
|
__ mov(ebx, Immediate(0x49800000)); // 1.0 x 2^20 as single.
|
|
__ movd(xmm1, ebx);
|
|
__ movd(xmm0, eax);
|
|
__ cvtss2sd(xmm1, xmm1);
|
|
__ xorps(xmm0, xmm1);
|
|
__ subsd(xmm0, xmm1);
|
|
__ movdbl(FieldOperand(edi, HeapNumber::kValueOffset), xmm0);
|
|
} else {
|
|
// 0x4130000000000000 is 1.0 x 2^20 as a double.
|
|
__ mov(FieldOperand(edi, HeapNumber::kExponentOffset),
|
|
Immediate(0x41300000));
|
|
__ mov(FieldOperand(edi, HeapNumber::kMantissaOffset), eax);
|
|
__ fld_d(FieldOperand(edi, HeapNumber::kValueOffset));
|
|
__ mov(FieldOperand(edi, HeapNumber::kMantissaOffset), Immediate(0));
|
|
__ fld_d(FieldOperand(edi, HeapNumber::kValueOffset));
|
|
__ fsubp(1);
|
|
__ fstp_d(FieldOperand(edi, HeapNumber::kValueOffset));
|
|
}
|
|
__ mov(eax, edi);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitSubString(CallRuntime* expr) {
|
|
// Load the arguments on the stack and call the stub.
|
|
SubStringStub stub;
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 3);
|
|
VisitForStackValue(args->at(0));
|
|
VisitForStackValue(args->at(1));
|
|
VisitForStackValue(args->at(2));
|
|
__ CallStub(&stub);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitRegExpExec(CallRuntime* expr) {
|
|
// Load the arguments on the stack and call the stub.
|
|
RegExpExecStub stub;
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 4);
|
|
VisitForStackValue(args->at(0));
|
|
VisitForStackValue(args->at(1));
|
|
VisitForStackValue(args->at(2));
|
|
VisitForStackValue(args->at(3));
|
|
__ CallStub(&stub);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitValueOf(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
|
|
VisitForAccumulatorValue(args->at(0)); // Load the object.
|
|
|
|
Label done;
|
|
// If the object is a smi return the object.
|
|
__ JumpIfSmi(eax, &done, Label::kNear);
|
|
// If the object is not a value type, return the object.
|
|
__ CmpObjectType(eax, JS_VALUE_TYPE, ebx);
|
|
__ j(not_equal, &done, Label::kNear);
|
|
__ mov(eax, FieldOperand(eax, JSValue::kValueOffset));
|
|
|
|
__ bind(&done);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 2);
|
|
ASSERT_NE(NULL, args->at(1)->AsLiteral());
|
|
Smi* index = Smi::cast(*(args->at(1)->AsLiteral()->handle()));
|
|
|
|
VisitForAccumulatorValue(args->at(0)); // Load the object.
|
|
|
|
Label runtime, done;
|
|
Register object = eax;
|
|
Register result = eax;
|
|
Register scratch = ecx;
|
|
|
|
#ifdef DEBUG
|
|
__ AbortIfSmi(object);
|
|
__ CmpObjectType(object, JS_DATE_TYPE, scratch);
|
|
__ Assert(equal, "Trying to get date field from non-date.");
|
|
#endif
|
|
|
|
if (index->value() == 0) {
|
|
__ mov(result, FieldOperand(object, JSDate::kValueOffset));
|
|
} else {
|
|
if (index->value() < JSDate::kFirstUncachedField) {
|
|
ExternalReference stamp = ExternalReference::date_cache_stamp(isolate());
|
|
__ mov(scratch, Operand::StaticVariable(stamp));
|
|
__ cmp(scratch, FieldOperand(object, JSDate::kCacheStampOffset));
|
|
__ j(not_equal, &runtime, Label::kNear);
|
|
__ mov(result, FieldOperand(object, JSDate::kValueOffset +
|
|
kPointerSize * index->value()));
|
|
__ jmp(&done);
|
|
}
|
|
__ bind(&runtime);
|
|
__ PrepareCallCFunction(2, scratch);
|
|
__ mov(Operand(esp, 0), object);
|
|
__ mov(Operand(esp, 1 * kPointerSize), Immediate(index));
|
|
__ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2);
|
|
__ bind(&done);
|
|
}
|
|
context()->Plug(result);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitMathPow(CallRuntime* expr) {
|
|
// Load the arguments on the stack and call the runtime function.
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 2);
|
|
VisitForStackValue(args->at(0));
|
|
VisitForStackValue(args->at(1));
|
|
|
|
if (CpuFeatures::IsSupported(SSE2)) {
|
|
MathPowStub stub(MathPowStub::ON_STACK);
|
|
__ CallStub(&stub);
|
|
} else {
|
|
__ CallRuntime(Runtime::kMath_pow, 2);
|
|
}
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitSetValueOf(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 2);
|
|
|
|
VisitForStackValue(args->at(0)); // Load the object.
|
|
VisitForAccumulatorValue(args->at(1)); // Load the value.
|
|
__ pop(ebx); // eax = value. ebx = object.
|
|
|
|
Label done;
|
|
// If the object is a smi, return the value.
|
|
__ JumpIfSmi(ebx, &done, Label::kNear);
|
|
|
|
// If the object is not a value type, return the value.
|
|
__ CmpObjectType(ebx, JS_VALUE_TYPE, ecx);
|
|
__ j(not_equal, &done, Label::kNear);
|
|
|
|
// Store the value.
|
|
__ mov(FieldOperand(ebx, JSValue::kValueOffset), eax);
|
|
|
|
// Update the write barrier. Save the value as it will be
|
|
// overwritten by the write barrier code and is needed afterward.
|
|
__ mov(edx, eax);
|
|
__ RecordWriteField(ebx, JSValue::kValueOffset, edx, ecx, kDontSaveFPRegs);
|
|
|
|
__ bind(&done);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitNumberToString(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT_EQ(args->length(), 1);
|
|
|
|
// Load the argument on the stack and call the stub.
|
|
VisitForStackValue(args->at(0));
|
|
|
|
NumberToStringStub stub;
|
|
__ CallStub(&stub);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitStringCharFromCode(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
|
|
VisitForAccumulatorValue(args->at(0));
|
|
|
|
Label done;
|
|
StringCharFromCodeGenerator generator(eax, ebx);
|
|
generator.GenerateFast(masm_);
|
|
__ jmp(&done);
|
|
|
|
NopRuntimeCallHelper call_helper;
|
|
generator.GenerateSlow(masm_, call_helper);
|
|
|
|
__ bind(&done);
|
|
context()->Plug(ebx);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitStringCharCodeAt(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 2);
|
|
|
|
VisitForStackValue(args->at(0));
|
|
VisitForAccumulatorValue(args->at(1));
|
|
|
|
Register object = ebx;
|
|
Register index = eax;
|
|
Register result = edx;
|
|
|
|
__ pop(object);
|
|
|
|
Label need_conversion;
|
|
Label index_out_of_range;
|
|
Label done;
|
|
StringCharCodeAtGenerator generator(object,
|
|
index,
|
|
result,
|
|
&need_conversion,
|
|
&need_conversion,
|
|
&index_out_of_range,
|
|
STRING_INDEX_IS_NUMBER);
|
|
generator.GenerateFast(masm_);
|
|
__ jmp(&done);
|
|
|
|
__ bind(&index_out_of_range);
|
|
// When the index is out of range, the spec requires us to return
|
|
// NaN.
|
|
__ Set(result, Immediate(isolate()->factory()->nan_value()));
|
|
__ jmp(&done);
|
|
|
|
__ bind(&need_conversion);
|
|
// Move the undefined value into the result register, which will
|
|
// trigger conversion.
|
|
__ Set(result, Immediate(isolate()->factory()->undefined_value()));
|
|
__ jmp(&done);
|
|
|
|
NopRuntimeCallHelper call_helper;
|
|
generator.GenerateSlow(masm_, call_helper);
|
|
|
|
__ bind(&done);
|
|
context()->Plug(result);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitStringCharAt(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 2);
|
|
|
|
VisitForStackValue(args->at(0));
|
|
VisitForAccumulatorValue(args->at(1));
|
|
|
|
Register object = ebx;
|
|
Register index = eax;
|
|
Register scratch = edx;
|
|
Register result = eax;
|
|
|
|
__ pop(object);
|
|
|
|
Label need_conversion;
|
|
Label index_out_of_range;
|
|
Label done;
|
|
StringCharAtGenerator generator(object,
|
|
index,
|
|
scratch,
|
|
result,
|
|
&need_conversion,
|
|
&need_conversion,
|
|
&index_out_of_range,
|
|
STRING_INDEX_IS_NUMBER);
|
|
generator.GenerateFast(masm_);
|
|
__ jmp(&done);
|
|
|
|
__ bind(&index_out_of_range);
|
|
// When the index is out of range, the spec requires us to return
|
|
// the empty string.
|
|
__ Set(result, Immediate(isolate()->factory()->empty_string()));
|
|
__ jmp(&done);
|
|
|
|
__ bind(&need_conversion);
|
|
// Move smi zero into the result register, which will trigger
|
|
// conversion.
|
|
__ Set(result, Immediate(Smi::FromInt(0)));
|
|
__ jmp(&done);
|
|
|
|
NopRuntimeCallHelper call_helper;
|
|
generator.GenerateSlow(masm_, call_helper);
|
|
|
|
__ bind(&done);
|
|
context()->Plug(result);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitStringAdd(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT_EQ(2, args->length());
|
|
|
|
VisitForStackValue(args->at(0));
|
|
VisitForStackValue(args->at(1));
|
|
|
|
StringAddStub stub(NO_STRING_ADD_FLAGS);
|
|
__ CallStub(&stub);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitStringCompare(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT_EQ(2, args->length());
|
|
|
|
VisitForStackValue(args->at(0));
|
|
VisitForStackValue(args->at(1));
|
|
|
|
StringCompareStub stub;
|
|
__ CallStub(&stub);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitMathSin(CallRuntime* expr) {
|
|
// Load the argument on the stack and call the stub.
|
|
TranscendentalCacheStub stub(TranscendentalCache::SIN,
|
|
TranscendentalCacheStub::TAGGED);
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
VisitForStackValue(args->at(0));
|
|
__ CallStub(&stub);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitMathCos(CallRuntime* expr) {
|
|
// Load the argument on the stack and call the stub.
|
|
TranscendentalCacheStub stub(TranscendentalCache::COS,
|
|
TranscendentalCacheStub::TAGGED);
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
VisitForStackValue(args->at(0));
|
|
__ CallStub(&stub);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitMathTan(CallRuntime* expr) {
|
|
// Load the argument on the stack and call the stub.
|
|
TranscendentalCacheStub stub(TranscendentalCache::TAN,
|
|
TranscendentalCacheStub::TAGGED);
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
VisitForStackValue(args->at(0));
|
|
__ CallStub(&stub);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitMathLog(CallRuntime* expr) {
|
|
// Load the argument on the stack and call the stub.
|
|
TranscendentalCacheStub stub(TranscendentalCache::LOG,
|
|
TranscendentalCacheStub::TAGGED);
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
VisitForStackValue(args->at(0));
|
|
__ CallStub(&stub);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitMathSqrt(CallRuntime* expr) {
|
|
// Load the argument on the stack and call the runtime function.
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
VisitForStackValue(args->at(0));
|
|
__ CallRuntime(Runtime::kMath_sqrt, 1);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitCallFunction(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() >= 2);
|
|
|
|
int arg_count = args->length() - 2; // 2 ~ receiver and function.
|
|
for (int i = 0; i < arg_count + 1; ++i) {
|
|
VisitForStackValue(args->at(i));
|
|
}
|
|
VisitForAccumulatorValue(args->last()); // Function.
|
|
|
|
// Check for proxy.
|
|
Label proxy, done;
|
|
__ CmpObjectType(eax, JS_FUNCTION_PROXY_TYPE, ebx);
|
|
__ j(equal, &proxy);
|
|
|
|
// InvokeFunction requires the function in edi. Move it in there.
|
|
__ mov(edi, result_register());
|
|
ParameterCount count(arg_count);
|
|
__ InvokeFunction(edi, count, CALL_FUNCTION,
|
|
NullCallWrapper(), CALL_AS_METHOD);
|
|
__ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
|
|
__ jmp(&done);
|
|
|
|
__ bind(&proxy);
|
|
__ push(eax);
|
|
__ CallRuntime(Runtime::kCall, args->length());
|
|
__ bind(&done);
|
|
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitRegExpConstructResult(CallRuntime* expr) {
|
|
// Load the arguments on the stack and call the stub.
|
|
RegExpConstructResultStub stub;
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 3);
|
|
VisitForStackValue(args->at(0));
|
|
VisitForStackValue(args->at(1));
|
|
VisitForStackValue(args->at(2));
|
|
__ CallStub(&stub);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitGetFromCache(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT_EQ(2, args->length());
|
|
|
|
ASSERT_NE(NULL, args->at(0)->AsLiteral());
|
|
int cache_id = Smi::cast(*(args->at(0)->AsLiteral()->handle()))->value();
|
|
|
|
Handle<FixedArray> jsfunction_result_caches(
|
|
isolate()->global_context()->jsfunction_result_caches());
|
|
if (jsfunction_result_caches->length() <= cache_id) {
|
|
__ Abort("Attempt to use undefined cache.");
|
|
__ mov(eax, isolate()->factory()->undefined_value());
|
|
context()->Plug(eax);
|
|
return;
|
|
}
|
|
|
|
VisitForAccumulatorValue(args->at(1));
|
|
|
|
Register key = eax;
|
|
Register cache = ebx;
|
|
Register tmp = ecx;
|
|
__ mov(cache, ContextOperand(esi, Context::GLOBAL_INDEX));
|
|
__ mov(cache,
|
|
FieldOperand(cache, GlobalObject::kGlobalContextOffset));
|
|
__ mov(cache, ContextOperand(cache, Context::JSFUNCTION_RESULT_CACHES_INDEX));
|
|
__ mov(cache,
|
|
FieldOperand(cache, FixedArray::OffsetOfElementAt(cache_id)));
|
|
|
|
Label done, not_found;
|
|
// tmp now holds finger offset as a smi.
|
|
STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1);
|
|
__ mov(tmp, FieldOperand(cache, JSFunctionResultCache::kFingerOffset));
|
|
__ cmp(key, CodeGenerator::FixedArrayElementOperand(cache, tmp));
|
|
__ j(not_equal, ¬_found);
|
|
|
|
__ mov(eax, CodeGenerator::FixedArrayElementOperand(cache, tmp, 1));
|
|
__ jmp(&done);
|
|
|
|
__ bind(¬_found);
|
|
// Call runtime to perform the lookup.
|
|
__ push(cache);
|
|
__ push(key);
|
|
__ CallRuntime(Runtime::kGetFromCache, 2);
|
|
|
|
__ bind(&done);
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitIsRegExpEquivalent(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT_EQ(2, args->length());
|
|
|
|
Register right = eax;
|
|
Register left = ebx;
|
|
Register tmp = ecx;
|
|
|
|
VisitForStackValue(args->at(0));
|
|
VisitForAccumulatorValue(args->at(1));
|
|
__ pop(left);
|
|
|
|
Label done, fail, ok;
|
|
__ cmp(left, right);
|
|
__ j(equal, &ok);
|
|
// Fail if either is a non-HeapObject.
|
|
__ mov(tmp, left);
|
|
__ and_(tmp, right);
|
|
__ JumpIfSmi(tmp, &fail);
|
|
__ mov(tmp, FieldOperand(left, HeapObject::kMapOffset));
|
|
__ CmpInstanceType(tmp, JS_REGEXP_TYPE);
|
|
__ j(not_equal, &fail);
|
|
__ cmp(tmp, FieldOperand(right, HeapObject::kMapOffset));
|
|
__ j(not_equal, &fail);
|
|
__ mov(tmp, FieldOperand(left, JSRegExp::kDataOffset));
|
|
__ cmp(tmp, FieldOperand(right, JSRegExp::kDataOffset));
|
|
__ j(equal, &ok);
|
|
__ bind(&fail);
|
|
__ mov(eax, Immediate(isolate()->factory()->false_value()));
|
|
__ jmp(&done);
|
|
__ bind(&ok);
|
|
__ mov(eax, Immediate(isolate()->factory()->true_value()));
|
|
__ bind(&done);
|
|
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitHasCachedArrayIndex(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
|
|
VisitForAccumulatorValue(args->at(0));
|
|
|
|
if (FLAG_debug_code) {
|
|
__ AbortIfNotString(eax);
|
|
}
|
|
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
__ test(FieldOperand(eax, String::kHashFieldOffset),
|
|
Immediate(String::kContainsCachedArrayIndexMask));
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
Split(zero, if_true, if_false, fall_through);
|
|
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitGetCachedArrayIndex(CallRuntime* expr) {
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 1);
|
|
VisitForAccumulatorValue(args->at(0));
|
|
|
|
if (FLAG_debug_code) {
|
|
__ AbortIfNotString(eax);
|
|
}
|
|
|
|
__ mov(eax, FieldOperand(eax, String::kHashFieldOffset));
|
|
__ IndexFromHash(eax, eax);
|
|
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
|
|
Label bailout, done, one_char_separator, long_separator,
|
|
non_trivial_array, not_size_one_array, loop,
|
|
loop_1, loop_1_condition, loop_2, loop_2_entry, loop_3, loop_3_entry;
|
|
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
ASSERT(args->length() == 2);
|
|
// We will leave the separator on the stack until the end of the function.
|
|
VisitForStackValue(args->at(1));
|
|
// Load this to eax (= array)
|
|
VisitForAccumulatorValue(args->at(0));
|
|
// All aliases of the same register have disjoint lifetimes.
|
|
Register array = eax;
|
|
Register elements = no_reg; // Will be eax.
|
|
|
|
Register index = edx;
|
|
|
|
Register string_length = ecx;
|
|
|
|
Register string = esi;
|
|
|
|
Register scratch = ebx;
|
|
|
|
Register array_length = edi;
|
|
Register result_pos = no_reg; // Will be edi.
|
|
|
|
// Separator operand is already pushed.
|
|
Operand separator_operand = Operand(esp, 2 * kPointerSize);
|
|
Operand result_operand = Operand(esp, 1 * kPointerSize);
|
|
Operand array_length_operand = Operand(esp, 0);
|
|
__ sub(esp, Immediate(2 * kPointerSize));
|
|
__ cld();
|
|
// Check that the array is a JSArray
|
|
__ JumpIfSmi(array, &bailout);
|
|
__ CmpObjectType(array, JS_ARRAY_TYPE, scratch);
|
|
__ j(not_equal, &bailout);
|
|
|
|
// Check that the array has fast elements.
|
|
__ CheckFastElements(scratch, &bailout);
|
|
|
|
// If the array has length zero, return the empty string.
|
|
__ mov(array_length, FieldOperand(array, JSArray::kLengthOffset));
|
|
__ SmiUntag(array_length);
|
|
__ j(not_zero, &non_trivial_array);
|
|
__ mov(result_operand, isolate()->factory()->empty_string());
|
|
__ jmp(&done);
|
|
|
|
// Save the array length.
|
|
__ bind(&non_trivial_array);
|
|
__ mov(array_length_operand, array_length);
|
|
|
|
// Save the FixedArray containing array's elements.
|
|
// End of array's live range.
|
|
elements = array;
|
|
__ mov(elements, FieldOperand(array, JSArray::kElementsOffset));
|
|
array = no_reg;
|
|
|
|
|
|
// Check that all array elements are sequential ASCII strings, and
|
|
// accumulate the sum of their lengths, as a smi-encoded value.
|
|
__ Set(index, Immediate(0));
|
|
__ Set(string_length, Immediate(0));
|
|
// Loop condition: while (index < length).
|
|
// Live loop registers: index, array_length, string,
|
|
// scratch, string_length, elements.
|
|
if (FLAG_debug_code) {
|
|
__ cmp(index, array_length);
|
|
__ Assert(less, "No empty arrays here in EmitFastAsciiArrayJoin");
|
|
}
|
|
__ bind(&loop);
|
|
__ mov(string, FieldOperand(elements,
|
|
index,
|
|
times_pointer_size,
|
|
FixedArray::kHeaderSize));
|
|
__ JumpIfSmi(string, &bailout);
|
|
__ mov(scratch, FieldOperand(string, HeapObject::kMapOffset));
|
|
__ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
|
|
__ and_(scratch, Immediate(
|
|
kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask));
|
|
__ cmp(scratch, kStringTag | kAsciiStringTag | kSeqStringTag);
|
|
__ j(not_equal, &bailout);
|
|
__ add(string_length,
|
|
FieldOperand(string, SeqAsciiString::kLengthOffset));
|
|
__ j(overflow, &bailout);
|
|
__ add(index, Immediate(1));
|
|
__ cmp(index, array_length);
|
|
__ j(less, &loop);
|
|
|
|
// If array_length is 1, return elements[0], a string.
|
|
__ cmp(array_length, 1);
|
|
__ j(not_equal, ¬_size_one_array);
|
|
__ mov(scratch, FieldOperand(elements, FixedArray::kHeaderSize));
|
|
__ mov(result_operand, scratch);
|
|
__ jmp(&done);
|
|
|
|
__ bind(¬_size_one_array);
|
|
|
|
// End of array_length live range.
|
|
result_pos = array_length;
|
|
array_length = no_reg;
|
|
|
|
// Live registers:
|
|
// string_length: Sum of string lengths, as a smi.
|
|
// elements: FixedArray of strings.
|
|
|
|
// Check that the separator is a flat ASCII string.
|
|
__ mov(string, separator_operand);
|
|
__ JumpIfSmi(string, &bailout);
|
|
__ mov(scratch, FieldOperand(string, HeapObject::kMapOffset));
|
|
__ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
|
|
__ and_(scratch, Immediate(
|
|
kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask));
|
|
__ cmp(scratch, ASCII_STRING_TYPE);
|
|
__ j(not_equal, &bailout);
|
|
|
|
// Add (separator length times array_length) - separator length
|
|
// to string_length.
|
|
__ mov(scratch, separator_operand);
|
|
__ mov(scratch, FieldOperand(scratch, SeqAsciiString::kLengthOffset));
|
|
__ sub(string_length, scratch); // May be negative, temporarily.
|
|
__ imul(scratch, array_length_operand);
|
|
__ j(overflow, &bailout);
|
|
__ add(string_length, scratch);
|
|
__ j(overflow, &bailout);
|
|
|
|
__ shr(string_length, 1);
|
|
// Live registers and stack values:
|
|
// string_length
|
|
// elements
|
|
__ AllocateAsciiString(result_pos, string_length, scratch,
|
|
index, string, &bailout);
|
|
__ mov(result_operand, result_pos);
|
|
__ lea(result_pos, FieldOperand(result_pos, SeqAsciiString::kHeaderSize));
|
|
|
|
|
|
__ mov(string, separator_operand);
|
|
__ cmp(FieldOperand(string, SeqAsciiString::kLengthOffset),
|
|
Immediate(Smi::FromInt(1)));
|
|
__ j(equal, &one_char_separator);
|
|
__ j(greater, &long_separator);
|
|
|
|
|
|
// Empty separator case
|
|
__ mov(index, Immediate(0));
|
|
__ jmp(&loop_1_condition);
|
|
// Loop condition: while (index < length).
|
|
__ bind(&loop_1);
|
|
// Each iteration of the loop concatenates one string to the result.
|
|
// Live values in registers:
|
|
// index: which element of the elements array we are adding to the result.
|
|
// result_pos: the position to which we are currently copying characters.
|
|
// elements: the FixedArray of strings we are joining.
|
|
|
|
// Get string = array[index].
|
|
__ mov(string, FieldOperand(elements, index,
|
|
times_pointer_size,
|
|
FixedArray::kHeaderSize));
|
|
__ mov(string_length,
|
|
FieldOperand(string, String::kLengthOffset));
|
|
__ shr(string_length, 1);
|
|
__ lea(string,
|
|
FieldOperand(string, SeqAsciiString::kHeaderSize));
|
|
__ CopyBytes(string, result_pos, string_length, scratch);
|
|
__ add(index, Immediate(1));
|
|
__ bind(&loop_1_condition);
|
|
__ cmp(index, array_length_operand);
|
|
__ j(less, &loop_1); // End while (index < length).
|
|
__ jmp(&done);
|
|
|
|
|
|
|
|
// One-character separator case
|
|
__ bind(&one_char_separator);
|
|
// Replace separator with its ASCII character value.
|
|
__ mov_b(scratch, FieldOperand(string, SeqAsciiString::kHeaderSize));
|
|
__ mov_b(separator_operand, scratch);
|
|
|
|
__ Set(index, Immediate(0));
|
|
// Jump into the loop after the code that copies the separator, so the first
|
|
// element is not preceded by a separator
|
|
__ jmp(&loop_2_entry);
|
|
// Loop condition: while (index < length).
|
|
__ bind(&loop_2);
|
|
// Each iteration of the loop concatenates one string to the result.
|
|
// Live values in registers:
|
|
// index: which element of the elements array we are adding to the result.
|
|
// result_pos: the position to which we are currently copying characters.
|
|
|
|
// Copy the separator character to the result.
|
|
__ mov_b(scratch, separator_operand);
|
|
__ mov_b(Operand(result_pos, 0), scratch);
|
|
__ inc(result_pos);
|
|
|
|
__ bind(&loop_2_entry);
|
|
// Get string = array[index].
|
|
__ mov(string, FieldOperand(elements, index,
|
|
times_pointer_size,
|
|
FixedArray::kHeaderSize));
|
|
__ mov(string_length,
|
|
FieldOperand(string, String::kLengthOffset));
|
|
__ shr(string_length, 1);
|
|
__ lea(string,
|
|
FieldOperand(string, SeqAsciiString::kHeaderSize));
|
|
__ CopyBytes(string, result_pos, string_length, scratch);
|
|
__ add(index, Immediate(1));
|
|
|
|
__ cmp(index, array_length_operand);
|
|
__ j(less, &loop_2); // End while (index < length).
|
|
__ jmp(&done);
|
|
|
|
|
|
// Long separator case (separator is more than one character).
|
|
__ bind(&long_separator);
|
|
|
|
__ Set(index, Immediate(0));
|
|
// Jump into the loop after the code that copies the separator, so the first
|
|
// element is not preceded by a separator
|
|
__ jmp(&loop_3_entry);
|
|
// Loop condition: while (index < length).
|
|
__ bind(&loop_3);
|
|
// Each iteration of the loop concatenates one string to the result.
|
|
// Live values in registers:
|
|
// index: which element of the elements array we are adding to the result.
|
|
// result_pos: the position to which we are currently copying characters.
|
|
|
|
// Copy the separator to the result.
|
|
__ mov(string, separator_operand);
|
|
__ mov(string_length,
|
|
FieldOperand(string, String::kLengthOffset));
|
|
__ shr(string_length, 1);
|
|
__ lea(string,
|
|
FieldOperand(string, SeqAsciiString::kHeaderSize));
|
|
__ CopyBytes(string, result_pos, string_length, scratch);
|
|
|
|
__ bind(&loop_3_entry);
|
|
// Get string = array[index].
|
|
__ mov(string, FieldOperand(elements, index,
|
|
times_pointer_size,
|
|
FixedArray::kHeaderSize));
|
|
__ mov(string_length,
|
|
FieldOperand(string, String::kLengthOffset));
|
|
__ shr(string_length, 1);
|
|
__ lea(string,
|
|
FieldOperand(string, SeqAsciiString::kHeaderSize));
|
|
__ CopyBytes(string, result_pos, string_length, scratch);
|
|
__ add(index, Immediate(1));
|
|
|
|
__ cmp(index, array_length_operand);
|
|
__ j(less, &loop_3); // End while (index < length).
|
|
__ jmp(&done);
|
|
|
|
|
|
__ bind(&bailout);
|
|
__ mov(result_operand, isolate()->factory()->undefined_value());
|
|
__ bind(&done);
|
|
__ mov(eax, result_operand);
|
|
// Drop temp values from the stack, and restore context register.
|
|
__ add(esp, Immediate(3 * kPointerSize));
|
|
|
|
__ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
|
|
Handle<String> name = expr->name();
|
|
if (name->length() > 0 && name->Get(0) == '_') {
|
|
Comment cmnt(masm_, "[ InlineRuntimeCall");
|
|
EmitInlineRuntimeCall(expr);
|
|
return;
|
|
}
|
|
|
|
Comment cmnt(masm_, "[ CallRuntime");
|
|
ZoneList<Expression*>* args = expr->arguments();
|
|
|
|
if (expr->is_jsruntime()) {
|
|
// Prepare for calling JS runtime function.
|
|
__ mov(eax, GlobalObjectOperand());
|
|
__ push(FieldOperand(eax, GlobalObject::kBuiltinsOffset));
|
|
}
|
|
|
|
// Push the arguments ("left-to-right").
|
|
int arg_count = args->length();
|
|
for (int i = 0; i < arg_count; i++) {
|
|
VisitForStackValue(args->at(i));
|
|
}
|
|
|
|
if (expr->is_jsruntime()) {
|
|
// Call the JS runtime function via a call IC.
|
|
__ Set(ecx, Immediate(expr->name()));
|
|
RelocInfo::Mode mode = RelocInfo::CODE_TARGET;
|
|
Handle<Code> ic =
|
|
isolate()->stub_cache()->ComputeCallInitialize(arg_count, mode);
|
|
CallIC(ic, mode, expr->id());
|
|
// Restore context register.
|
|
__ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
|
|
} else {
|
|
// Call the C runtime function.
|
|
__ CallRuntime(expr->function(), arg_count);
|
|
}
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
|
|
switch (expr->op()) {
|
|
case Token::DELETE: {
|
|
Comment cmnt(masm_, "[ UnaryOperation (DELETE)");
|
|
Property* property = expr->expression()->AsProperty();
|
|
VariableProxy* proxy = expr->expression()->AsVariableProxy();
|
|
|
|
if (property != NULL) {
|
|
VisitForStackValue(property->obj());
|
|
VisitForStackValue(property->key());
|
|
StrictModeFlag strict_mode_flag = (language_mode() == CLASSIC_MODE)
|
|
? kNonStrictMode : kStrictMode;
|
|
__ push(Immediate(Smi::FromInt(strict_mode_flag)));
|
|
__ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION);
|
|
context()->Plug(eax);
|
|
} else if (proxy != NULL) {
|
|
Variable* var = proxy->var();
|
|
// Delete of an unqualified identifier is disallowed in strict mode
|
|
// but "delete this" is allowed.
|
|
ASSERT(language_mode() == CLASSIC_MODE || var->is_this());
|
|
if (var->IsUnallocated()) {
|
|
__ push(GlobalObjectOperand());
|
|
__ push(Immediate(var->name()));
|
|
__ push(Immediate(Smi::FromInt(kNonStrictMode)));
|
|
__ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION);
|
|
context()->Plug(eax);
|
|
} else if (var->IsStackAllocated() || var->IsContextSlot()) {
|
|
// Result of deleting non-global variables is false. 'this' is
|
|
// not really a variable, though we implement it as one. The
|
|
// subexpression does not have side effects.
|
|
context()->Plug(var->is_this());
|
|
} else {
|
|
// Non-global variable. Call the runtime to try to delete from the
|
|
// context where the variable was introduced.
|
|
__ push(context_register());
|
|
__ push(Immediate(var->name()));
|
|
__ CallRuntime(Runtime::kDeleteContextSlot, 2);
|
|
context()->Plug(eax);
|
|
}
|
|
} else {
|
|
// Result of deleting non-property, non-variable reference is true.
|
|
// The subexpression may have side effects.
|
|
VisitForEffect(expr->expression());
|
|
context()->Plug(true);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case Token::VOID: {
|
|
Comment cmnt(masm_, "[ UnaryOperation (VOID)");
|
|
VisitForEffect(expr->expression());
|
|
context()->Plug(isolate()->factory()->undefined_value());
|
|
break;
|
|
}
|
|
|
|
case Token::NOT: {
|
|
Comment cmnt(masm_, "[ UnaryOperation (NOT)");
|
|
if (context()->IsEffect()) {
|
|
// Unary NOT has no side effects so it's only necessary to visit the
|
|
// subexpression. Match the optimizing compiler by not branching.
|
|
VisitForEffect(expr->expression());
|
|
} else if (context()->IsTest()) {
|
|
const TestContext* test = TestContext::cast(context());
|
|
// The labels are swapped for the recursive call.
|
|
VisitForControl(expr->expression(),
|
|
test->false_label(),
|
|
test->true_label(),
|
|
test->fall_through());
|
|
context()->Plug(test->true_label(), test->false_label());
|
|
} else {
|
|
// We handle value contexts explicitly rather than simply visiting
|
|
// for control and plugging the control flow into the context,
|
|
// because we need to prepare a pair of extra administrative AST ids
|
|
// for the optimizing compiler.
|
|
ASSERT(context()->IsAccumulatorValue() || context()->IsStackValue());
|
|
Label materialize_true, materialize_false, done;
|
|
VisitForControl(expr->expression(),
|
|
&materialize_false,
|
|
&materialize_true,
|
|
&materialize_true);
|
|
__ bind(&materialize_true);
|
|
PrepareForBailoutForId(expr->MaterializeTrueId(), NO_REGISTERS);
|
|
if (context()->IsAccumulatorValue()) {
|
|
__ mov(eax, isolate()->factory()->true_value());
|
|
} else {
|
|
__ Push(isolate()->factory()->true_value());
|
|
}
|
|
__ jmp(&done, Label::kNear);
|
|
__ bind(&materialize_false);
|
|
PrepareForBailoutForId(expr->MaterializeFalseId(), NO_REGISTERS);
|
|
if (context()->IsAccumulatorValue()) {
|
|
__ mov(eax, isolate()->factory()->false_value());
|
|
} else {
|
|
__ Push(isolate()->factory()->false_value());
|
|
}
|
|
__ bind(&done);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case Token::TYPEOF: {
|
|
Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)");
|
|
{ StackValueContext context(this);
|
|
VisitForTypeofValue(expr->expression());
|
|
}
|
|
__ CallRuntime(Runtime::kTypeof, 1);
|
|
context()->Plug(eax);
|
|
break;
|
|
}
|
|
|
|
case Token::ADD: {
|
|
Comment cmt(masm_, "[ UnaryOperation (ADD)");
|
|
VisitForAccumulatorValue(expr->expression());
|
|
Label no_conversion;
|
|
__ JumpIfSmi(result_register(), &no_conversion);
|
|
ToNumberStub convert_stub;
|
|
__ CallStub(&convert_stub);
|
|
__ bind(&no_conversion);
|
|
context()->Plug(result_register());
|
|
break;
|
|
}
|
|
|
|
case Token::SUB:
|
|
EmitUnaryOperation(expr, "[ UnaryOperation (SUB)");
|
|
break;
|
|
|
|
case Token::BIT_NOT:
|
|
EmitUnaryOperation(expr, "[ UnaryOperation (BIT_NOT)");
|
|
break;
|
|
|
|
default:
|
|
UNREACHABLE();
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitUnaryOperation(UnaryOperation* expr,
|
|
const char* comment) {
|
|
Comment cmt(masm_, comment);
|
|
bool can_overwrite = expr->expression()->ResultOverwriteAllowed();
|
|
UnaryOverwriteMode overwrite =
|
|
can_overwrite ? UNARY_OVERWRITE : UNARY_NO_OVERWRITE;
|
|
UnaryOpStub stub(expr->op(), overwrite);
|
|
// UnaryOpStub expects the argument to be in the
|
|
// accumulator register eax.
|
|
VisitForAccumulatorValue(expr->expression());
|
|
SetSourcePosition(expr->position());
|
|
CallIC(stub.GetCode(), RelocInfo::CODE_TARGET, expr->id());
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
|
|
Comment cmnt(masm_, "[ CountOperation");
|
|
SetSourcePosition(expr->position());
|
|
|
|
// Invalid left-hand sides are rewritten to have a 'throw ReferenceError'
|
|
// as the left-hand side.
|
|
if (!expr->expression()->IsValidLeftHandSide()) {
|
|
VisitForEffect(expr->expression());
|
|
return;
|
|
}
|
|
|
|
// Expression can only be a property, a global or a (parameter or local)
|
|
// slot.
|
|
enum LhsKind { VARIABLE, NAMED_PROPERTY, KEYED_PROPERTY };
|
|
LhsKind assign_type = VARIABLE;
|
|
Property* prop = expr->expression()->AsProperty();
|
|
// In case of a property we use the uninitialized expression context
|
|
// of the key to detect a named property.
|
|
if (prop != NULL) {
|
|
assign_type =
|
|
(prop->key()->IsPropertyName()) ? NAMED_PROPERTY : KEYED_PROPERTY;
|
|
}
|
|
|
|
// Evaluate expression and get value.
|
|
if (assign_type == VARIABLE) {
|
|
ASSERT(expr->expression()->AsVariableProxy()->var() != NULL);
|
|
AccumulatorValueContext context(this);
|
|
EmitVariableLoad(expr->expression()->AsVariableProxy());
|
|
} else {
|
|
// Reserve space for result of postfix operation.
|
|
if (expr->is_postfix() && !context()->IsEffect()) {
|
|
__ push(Immediate(Smi::FromInt(0)));
|
|
}
|
|
if (assign_type == NAMED_PROPERTY) {
|
|
// Put the object both on the stack and in edx.
|
|
VisitForAccumulatorValue(prop->obj());
|
|
__ push(eax);
|
|
__ mov(edx, eax);
|
|
EmitNamedPropertyLoad(prop);
|
|
} else {
|
|
VisitForStackValue(prop->obj());
|
|
VisitForStackValue(prop->key());
|
|
__ mov(edx, Operand(esp, kPointerSize)); // Object.
|
|
__ mov(ecx, Operand(esp, 0)); // Key.
|
|
EmitKeyedPropertyLoad(prop);
|
|
}
|
|
}
|
|
|
|
// We need a second deoptimization point after loading the value
|
|
// in case evaluating the property load my have a side effect.
|
|
if (assign_type == VARIABLE) {
|
|
PrepareForBailout(expr->expression(), TOS_REG);
|
|
} else {
|
|
PrepareForBailoutForId(expr->CountId(), TOS_REG);
|
|
}
|
|
|
|
// Call ToNumber only if operand is not a smi.
|
|
Label no_conversion;
|
|
if (ShouldInlineSmiCase(expr->op())) {
|
|
__ JumpIfSmi(eax, &no_conversion, Label::kNear);
|
|
}
|
|
ToNumberStub convert_stub;
|
|
__ CallStub(&convert_stub);
|
|
__ bind(&no_conversion);
|
|
|
|
// Save result for postfix expressions.
|
|
if (expr->is_postfix()) {
|
|
if (!context()->IsEffect()) {
|
|
// Save the result on the stack. If we have a named or keyed property
|
|
// we store the result under the receiver that is currently on top
|
|
// of the stack.
|
|
switch (assign_type) {
|
|
case VARIABLE:
|
|
__ push(eax);
|
|
break;
|
|
case NAMED_PROPERTY:
|
|
__ mov(Operand(esp, kPointerSize), eax);
|
|
break;
|
|
case KEYED_PROPERTY:
|
|
__ mov(Operand(esp, 2 * kPointerSize), eax);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Inline smi case if we are in a loop.
|
|
Label done, stub_call;
|
|
JumpPatchSite patch_site(masm_);
|
|
|
|
if (ShouldInlineSmiCase(expr->op())) {
|
|
if (expr->op() == Token::INC) {
|
|
__ add(eax, Immediate(Smi::FromInt(1)));
|
|
} else {
|
|
__ sub(eax, Immediate(Smi::FromInt(1)));
|
|
}
|
|
__ j(overflow, &stub_call, Label::kNear);
|
|
// We could eliminate this smi check if we split the code at
|
|
// the first smi check before calling ToNumber.
|
|
patch_site.EmitJumpIfSmi(eax, &done, Label::kNear);
|
|
|
|
__ bind(&stub_call);
|
|
// Call stub. Undo operation first.
|
|
if (expr->op() == Token::INC) {
|
|
__ sub(eax, Immediate(Smi::FromInt(1)));
|
|
} else {
|
|
__ add(eax, Immediate(Smi::FromInt(1)));
|
|
}
|
|
}
|
|
|
|
// Record position before stub call.
|
|
SetSourcePosition(expr->position());
|
|
|
|
// Call stub for +1/-1.
|
|
__ mov(edx, eax);
|
|
__ mov(eax, Immediate(Smi::FromInt(1)));
|
|
BinaryOpStub stub(expr->binary_op(), NO_OVERWRITE);
|
|
CallIC(stub.GetCode(), RelocInfo::CODE_TARGET, expr->CountId());
|
|
patch_site.EmitPatchInfo();
|
|
__ bind(&done);
|
|
|
|
// Store the value returned in eax.
|
|
switch (assign_type) {
|
|
case VARIABLE:
|
|
if (expr->is_postfix()) {
|
|
// Perform the assignment as if via '='.
|
|
{ EffectContext context(this);
|
|
EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(),
|
|
Token::ASSIGN);
|
|
PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
|
|
context.Plug(eax);
|
|
}
|
|
// For all contexts except EffectContext We have the result on
|
|
// top of the stack.
|
|
if (!context()->IsEffect()) {
|
|
context()->PlugTOS();
|
|
}
|
|
} else {
|
|
// Perform the assignment as if via '='.
|
|
EmitVariableAssignment(expr->expression()->AsVariableProxy()->var(),
|
|
Token::ASSIGN);
|
|
PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
|
|
context()->Plug(eax);
|
|
}
|
|
break;
|
|
case NAMED_PROPERTY: {
|
|
__ mov(ecx, prop->key()->AsLiteral()->handle());
|
|
__ pop(edx);
|
|
Handle<Code> ic = is_classic_mode()
|
|
? isolate()->builtins()->StoreIC_Initialize()
|
|
: isolate()->builtins()->StoreIC_Initialize_Strict();
|
|
CallIC(ic, RelocInfo::CODE_TARGET, expr->id());
|
|
PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
|
|
if (expr->is_postfix()) {
|
|
if (!context()->IsEffect()) {
|
|
context()->PlugTOS();
|
|
}
|
|
} else {
|
|
context()->Plug(eax);
|
|
}
|
|
break;
|
|
}
|
|
case KEYED_PROPERTY: {
|
|
__ pop(ecx);
|
|
__ pop(edx);
|
|
Handle<Code> ic = is_classic_mode()
|
|
? isolate()->builtins()->KeyedStoreIC_Initialize()
|
|
: isolate()->builtins()->KeyedStoreIC_Initialize_Strict();
|
|
CallIC(ic, RelocInfo::CODE_TARGET, expr->id());
|
|
PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
|
|
if (expr->is_postfix()) {
|
|
// Result is on the stack
|
|
if (!context()->IsEffect()) {
|
|
context()->PlugTOS();
|
|
}
|
|
} else {
|
|
context()->Plug(eax);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitForTypeofValue(Expression* expr) {
|
|
VariableProxy* proxy = expr->AsVariableProxy();
|
|
ASSERT(!context()->IsEffect());
|
|
ASSERT(!context()->IsTest());
|
|
|
|
if (proxy != NULL && proxy->var()->IsUnallocated()) {
|
|
Comment cmnt(masm_, "Global variable");
|
|
__ mov(edx, GlobalObjectOperand());
|
|
__ mov(ecx, Immediate(proxy->name()));
|
|
Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize();
|
|
// Use a regular load, not a contextual load, to avoid a reference
|
|
// error.
|
|
CallIC(ic);
|
|
PrepareForBailout(expr, TOS_REG);
|
|
context()->Plug(eax);
|
|
} else if (proxy != NULL && proxy->var()->IsLookupSlot()) {
|
|
Label done, slow;
|
|
|
|
// Generate code for loading from variables potentially shadowed
|
|
// by eval-introduced variables.
|
|
EmitDynamicLookupFastCase(proxy->var(), INSIDE_TYPEOF, &slow, &done);
|
|
|
|
__ bind(&slow);
|
|
__ push(esi);
|
|
__ push(Immediate(proxy->name()));
|
|
__ CallRuntime(Runtime::kLoadContextSlotNoReferenceError, 2);
|
|
PrepareForBailout(expr, TOS_REG);
|
|
__ bind(&done);
|
|
|
|
context()->Plug(eax);
|
|
} else {
|
|
// This expression cannot throw a reference error at the top level.
|
|
VisitInDuplicateContext(expr);
|
|
}
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitLiteralCompareTypeof(Expression* expr,
|
|
Expression* sub_expr,
|
|
Handle<String> check) {
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
{ AccumulatorValueContext context(this);
|
|
VisitForTypeofValue(sub_expr);
|
|
}
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
|
|
if (check->Equals(isolate()->heap()->number_symbol())) {
|
|
__ JumpIfSmi(eax, if_true);
|
|
__ cmp(FieldOperand(eax, HeapObject::kMapOffset),
|
|
isolate()->factory()->heap_number_map());
|
|
Split(equal, if_true, if_false, fall_through);
|
|
} else if (check->Equals(isolate()->heap()->string_symbol())) {
|
|
__ JumpIfSmi(eax, if_false);
|
|
__ CmpObjectType(eax, FIRST_NONSTRING_TYPE, edx);
|
|
__ j(above_equal, if_false);
|
|
// Check for undetectable objects => false.
|
|
__ test_b(FieldOperand(edx, Map::kBitFieldOffset),
|
|
1 << Map::kIsUndetectable);
|
|
Split(zero, if_true, if_false, fall_through);
|
|
} else if (check->Equals(isolate()->heap()->boolean_symbol())) {
|
|
__ cmp(eax, isolate()->factory()->true_value());
|
|
__ j(equal, if_true);
|
|
__ cmp(eax, isolate()->factory()->false_value());
|
|
Split(equal, if_true, if_false, fall_through);
|
|
} else if (FLAG_harmony_typeof &&
|
|
check->Equals(isolate()->heap()->null_symbol())) {
|
|
__ cmp(eax, isolate()->factory()->null_value());
|
|
Split(equal, if_true, if_false, fall_through);
|
|
} else if (check->Equals(isolate()->heap()->undefined_symbol())) {
|
|
__ cmp(eax, isolate()->factory()->undefined_value());
|
|
__ j(equal, if_true);
|
|
__ JumpIfSmi(eax, if_false);
|
|
// Check for undetectable objects => true.
|
|
__ mov(edx, FieldOperand(eax, HeapObject::kMapOffset));
|
|
__ movzx_b(ecx, FieldOperand(edx, Map::kBitFieldOffset));
|
|
__ test(ecx, Immediate(1 << Map::kIsUndetectable));
|
|
Split(not_zero, if_true, if_false, fall_through);
|
|
} else if (check->Equals(isolate()->heap()->function_symbol())) {
|
|
__ JumpIfSmi(eax, if_false);
|
|
STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2);
|
|
__ CmpObjectType(eax, JS_FUNCTION_TYPE, edx);
|
|
__ j(equal, if_true);
|
|
__ CmpInstanceType(edx, JS_FUNCTION_PROXY_TYPE);
|
|
Split(equal, if_true, if_false, fall_through);
|
|
} else if (check->Equals(isolate()->heap()->object_symbol())) {
|
|
__ JumpIfSmi(eax, if_false);
|
|
if (!FLAG_harmony_typeof) {
|
|
__ cmp(eax, isolate()->factory()->null_value());
|
|
__ j(equal, if_true);
|
|
}
|
|
__ CmpObjectType(eax, FIRST_NONCALLABLE_SPEC_OBJECT_TYPE, edx);
|
|
__ j(below, if_false);
|
|
__ CmpInstanceType(edx, LAST_NONCALLABLE_SPEC_OBJECT_TYPE);
|
|
__ j(above, if_false);
|
|
// Check for undetectable objects => false.
|
|
__ test_b(FieldOperand(edx, Map::kBitFieldOffset),
|
|
1 << Map::kIsUndetectable);
|
|
Split(zero, if_true, if_false, fall_through);
|
|
} else {
|
|
if (if_false != fall_through) __ jmp(if_false);
|
|
}
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
|
|
Comment cmnt(masm_, "[ CompareOperation");
|
|
SetSourcePosition(expr->position());
|
|
|
|
// First we try a fast inlined version of the compare when one of
|
|
// the operands is a literal.
|
|
if (TryLiteralCompare(expr)) return;
|
|
|
|
// Always perform the comparison for its control flow. Pack the result
|
|
// into the expression's context after the comparison is performed.
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
Token::Value op = expr->op();
|
|
VisitForStackValue(expr->left());
|
|
switch (op) {
|
|
case Token::IN:
|
|
VisitForStackValue(expr->right());
|
|
__ InvokeBuiltin(Builtins::IN, CALL_FUNCTION);
|
|
PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
|
|
__ cmp(eax, isolate()->factory()->true_value());
|
|
Split(equal, if_true, if_false, fall_through);
|
|
break;
|
|
|
|
case Token::INSTANCEOF: {
|
|
VisitForStackValue(expr->right());
|
|
InstanceofStub stub(InstanceofStub::kNoFlags);
|
|
__ CallStub(&stub);
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
__ test(eax, eax);
|
|
// The stub returns 0 for true.
|
|
Split(zero, if_true, if_false, fall_through);
|
|
break;
|
|
}
|
|
|
|
default: {
|
|
VisitForAccumulatorValue(expr->right());
|
|
Condition cc = no_condition;
|
|
switch (op) {
|
|
case Token::EQ_STRICT:
|
|
case Token::EQ:
|
|
cc = equal;
|
|
break;
|
|
case Token::LT:
|
|
cc = less;
|
|
break;
|
|
case Token::GT:
|
|
cc = greater;
|
|
break;
|
|
case Token::LTE:
|
|
cc = less_equal;
|
|
break;
|
|
case Token::GTE:
|
|
cc = greater_equal;
|
|
break;
|
|
case Token::IN:
|
|
case Token::INSTANCEOF:
|
|
default:
|
|
UNREACHABLE();
|
|
}
|
|
__ pop(edx);
|
|
|
|
bool inline_smi_code = ShouldInlineSmiCase(op);
|
|
JumpPatchSite patch_site(masm_);
|
|
if (inline_smi_code) {
|
|
Label slow_case;
|
|
__ mov(ecx, edx);
|
|
__ or_(ecx, eax);
|
|
patch_site.EmitJumpIfNotSmi(ecx, &slow_case, Label::kNear);
|
|
__ cmp(edx, eax);
|
|
Split(cc, if_true, if_false, NULL);
|
|
__ bind(&slow_case);
|
|
}
|
|
|
|
// Record position and call the compare IC.
|
|
SetSourcePosition(expr->position());
|
|
Handle<Code> ic = CompareIC::GetUninitialized(op);
|
|
CallIC(ic, RelocInfo::CODE_TARGET, expr->id());
|
|
patch_site.EmitPatchInfo();
|
|
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
__ test(eax, eax);
|
|
Split(cc, if_true, if_false, fall_through);
|
|
}
|
|
}
|
|
|
|
// Convert the result of the comparison into one expected for this
|
|
// expression's context.
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::EmitLiteralCompareNil(CompareOperation* expr,
|
|
Expression* sub_expr,
|
|
NilValue nil) {
|
|
Label materialize_true, materialize_false;
|
|
Label* if_true = NULL;
|
|
Label* if_false = NULL;
|
|
Label* fall_through = NULL;
|
|
context()->PrepareTest(&materialize_true, &materialize_false,
|
|
&if_true, &if_false, &fall_through);
|
|
|
|
VisitForAccumulatorValue(sub_expr);
|
|
PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
|
|
Handle<Object> nil_value = nil == kNullValue ?
|
|
isolate()->factory()->null_value() :
|
|
isolate()->factory()->undefined_value();
|
|
__ cmp(eax, nil_value);
|
|
if (expr->op() == Token::EQ_STRICT) {
|
|
Split(equal, if_true, if_false, fall_through);
|
|
} else {
|
|
Handle<Object> other_nil_value = nil == kNullValue ?
|
|
isolate()->factory()->undefined_value() :
|
|
isolate()->factory()->null_value();
|
|
__ j(equal, if_true);
|
|
__ cmp(eax, other_nil_value);
|
|
__ j(equal, if_true);
|
|
__ JumpIfSmi(eax, if_false);
|
|
// It can be an undetectable object.
|
|
__ mov(edx, FieldOperand(eax, HeapObject::kMapOffset));
|
|
__ movzx_b(edx, FieldOperand(edx, Map::kBitFieldOffset));
|
|
__ test(edx, Immediate(1 << Map::kIsUndetectable));
|
|
Split(not_zero, if_true, if_false, fall_through);
|
|
}
|
|
context()->Plug(if_true, if_false);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::VisitThisFunction(ThisFunction* expr) {
|
|
__ mov(eax, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
|
|
context()->Plug(eax);
|
|
}
|
|
|
|
|
|
Register FullCodeGenerator::result_register() {
|
|
return eax;
|
|
}
|
|
|
|
|
|
Register FullCodeGenerator::context_register() {
|
|
return esi;
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::StoreToFrameField(int frame_offset, Register value) {
|
|
ASSERT_EQ(POINTER_SIZE_ALIGN(frame_offset), frame_offset);
|
|
__ mov(Operand(ebp, frame_offset), value);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::LoadContextField(Register dst, int context_index) {
|
|
__ mov(dst, ContextOperand(esi, context_index));
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::PushFunctionArgumentForContextAllocation() {
|
|
Scope* declaration_scope = scope()->DeclarationScope();
|
|
if (declaration_scope->is_global_scope() ||
|
|
declaration_scope->is_module_scope()) {
|
|
// Contexts nested in the global context have a canonical empty function
|
|
// as their closure, not the anonymous closure containing the global
|
|
// code. Pass a smi sentinel and let the runtime look up the empty
|
|
// function.
|
|
__ push(Immediate(Smi::FromInt(0)));
|
|
} else if (declaration_scope->is_eval_scope()) {
|
|
// Contexts nested inside eval code have the same closure as the context
|
|
// calling eval, not the anonymous closure containing the eval code.
|
|
// Fetch it from the context.
|
|
__ push(ContextOperand(esi, Context::CLOSURE_INDEX));
|
|
} else {
|
|
ASSERT(declaration_scope->is_function_scope());
|
|
__ push(Operand(ebp, JavaScriptFrameConstants::kFunctionOffset));
|
|
}
|
|
}
|
|
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// Non-local control flow support.
|
|
|
|
void FullCodeGenerator::EnterFinallyBlock() {
|
|
// Cook return address on top of stack (smi encoded Code* delta)
|
|
ASSERT(!result_register().is(edx));
|
|
__ pop(edx);
|
|
__ sub(edx, Immediate(masm_->CodeObject()));
|
|
STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1);
|
|
STATIC_ASSERT(kSmiTag == 0);
|
|
__ SmiTag(edx);
|
|
__ push(edx);
|
|
|
|
// Store result register while executing finally block.
|
|
__ push(result_register());
|
|
|
|
// Store pending message while executing finally block.
|
|
ExternalReference pending_message_obj =
|
|
ExternalReference::address_of_pending_message_obj(isolate());
|
|
__ mov(edx, Operand::StaticVariable(pending_message_obj));
|
|
__ push(edx);
|
|
|
|
ExternalReference has_pending_message =
|
|
ExternalReference::address_of_has_pending_message(isolate());
|
|
__ mov(edx, Operand::StaticVariable(has_pending_message));
|
|
__ SmiTag(edx);
|
|
__ push(edx);
|
|
|
|
ExternalReference pending_message_script =
|
|
ExternalReference::address_of_pending_message_script(isolate());
|
|
__ mov(edx, Operand::StaticVariable(pending_message_script));
|
|
__ push(edx);
|
|
}
|
|
|
|
|
|
void FullCodeGenerator::ExitFinallyBlock() {
|
|
ASSERT(!result_register().is(edx));
|
|
// Restore pending message from stack.
|
|
__ pop(edx);
|
|
ExternalReference pending_message_script =
|
|
ExternalReference::address_of_pending_message_script(isolate());
|
|
__ mov(Operand::StaticVariable(pending_message_script), edx);
|
|
|
|
__ pop(edx);
|
|
__ SmiUntag(edx);
|
|
ExternalReference has_pending_message =
|
|
ExternalReference::address_of_has_pending_message(isolate());
|
|
__ mov(Operand::StaticVariable(has_pending_message), edx);
|
|
|
|
__ pop(edx);
|
|
ExternalReference pending_message_obj =
|
|
ExternalReference::address_of_pending_message_obj(isolate());
|
|
__ mov(Operand::StaticVariable(pending_message_obj), edx);
|
|
|
|
// Restore result register from stack.
|
|
__ pop(result_register());
|
|
|
|
// Uncook return address.
|
|
__ pop(edx);
|
|
__ SmiUntag(edx);
|
|
__ add(edx, Immediate(masm_->CodeObject()));
|
|
__ jmp(edx);
|
|
}
|
|
|
|
|
|
#undef __
|
|
|
|
#define __ ACCESS_MASM(masm())
|
|
|
|
FullCodeGenerator::NestedStatement* FullCodeGenerator::TryFinally::Exit(
|
|
int* stack_depth,
|
|
int* context_length) {
|
|
// The macros used here must preserve the result register.
|
|
|
|
// Because the handler block contains the context of the finally
|
|
// code, we can restore it directly from there for the finally code
|
|
// rather than iteratively unwinding contexts via their previous
|
|
// links.
|
|
__ Drop(*stack_depth); // Down to the handler block.
|
|
if (*context_length > 0) {
|
|
// Restore the context to its dedicated register and the stack.
|
|
__ mov(esi, Operand(esp, StackHandlerConstants::kContextOffset));
|
|
__ mov(Operand(ebp, StandardFrameConstants::kContextOffset), esi);
|
|
}
|
|
__ PopTryHandler();
|
|
__ call(finally_entry_);
|
|
|
|
*stack_depth = 0;
|
|
*context_length = 0;
|
|
return previous_;
|
|
}
|
|
|
|
#undef __
|
|
|
|
} } // namespace v8::internal
|
|
|
|
#endif // V8_TARGET_ARCH_IA32
|