e9b5d7855b
Chromium build. v8.gyp no longer sets any V8_TARGET_ARCH_* macro on the Mac. Instead, the proper V8_TARGET_ARCH_* macro will be set by src/globals.h in the same way as the V8_HOST_ARCH_* macro when it detects that no target macro is currently defined. The Mac build will attempt to compile all ia32 and x86_64 .cc files. #ifdef guards in each of these target-specific source files prevent their compilation when the associated target is not selected. For completeness, these #ifdef guards are also provided for the arm and mips .cc files. BUG=706 TEST=x86_64 Mac GYP/Xcode-based Chromium build (still depends on other changes) Review URL: http://codereview.chromium.org/2133003 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4666 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
251 lines
8.9 KiB
C++
251 lines
8.9 KiB
C++
// Copyright 2010 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_X64)
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#include "codegen-inl.h"
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#include "fast-codegen.h"
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#include "scopes.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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Register FastCodeGenerator::accumulator0() { return rax; }
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Register FastCodeGenerator::accumulator1() { return rdx; }
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Register FastCodeGenerator::scratch0() { return rcx; }
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Register FastCodeGenerator::scratch1() { return rdi; }
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Register FastCodeGenerator::receiver_reg() { return rbx; }
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Register FastCodeGenerator::context_reg() { return rsi; }
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void FastCodeGenerator::EmitLoadReceiver() {
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// Offset 2 is due to return address and saved frame pointer.
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int index = 2 + scope()->num_parameters();
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__ movq(receiver_reg(), Operand(rbp, index * kPointerSize));
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}
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void FastCodeGenerator::EmitGlobalVariableLoad(Handle<Object> cell) {
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ASSERT(!destination().is(no_reg));
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ASSERT(cell->IsJSGlobalPropertyCell());
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__ Move(destination(), cell);
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__ movq(destination(),
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FieldOperand(destination(), JSGlobalPropertyCell::kValueOffset));
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if (FLAG_debug_code) {
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__ Cmp(destination(), Factory::the_hole_value());
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__ Check(not_equal, "DontDelete cells can't contain the hole");
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}
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// The loaded value is not known to be a smi.
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clear_as_smi(destination());
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}
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void FastCodeGenerator::EmitThisPropertyStore(Handle<String> name) {
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LookupResult lookup;
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info()->receiver()->Lookup(*name, &lookup);
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ASSERT(lookup.holder() == *info()->receiver());
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ASSERT(lookup.type() == FIELD);
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Handle<Map> map(Handle<HeapObject>::cast(info()->receiver())->map());
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int index = lookup.GetFieldIndex() - map->inobject_properties();
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int offset = index * kPointerSize;
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// We will emit the write barrier unless the stored value is statically
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// known to be a smi.
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bool needs_write_barrier = !is_smi(accumulator0());
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// Perform the store. Negative offsets are inobject properties.
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if (offset < 0) {
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offset += map->instance_size();
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__ movq(FieldOperand(receiver_reg(), offset), accumulator0());
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if (needs_write_barrier) {
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// Preserve receiver from write barrier.
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__ movq(scratch0(), receiver_reg());
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}
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} else {
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offset += FixedArray::kHeaderSize;
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__ movq(scratch0(),
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FieldOperand(receiver_reg(), JSObject::kPropertiesOffset));
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__ movq(FieldOperand(scratch0(), offset), accumulator0());
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}
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if (needs_write_barrier) {
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if (destination().is(no_reg)) {
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// After RecordWrite accumulator0 is only accidently a smi, but it is
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// already marked as not known to be one.
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__ RecordWrite(scratch0(), offset, accumulator0(), scratch1());
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} else {
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// Copy the value to the other accumulator to preserve a copy from the
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// write barrier. One of the accumulators is available as a scratch
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// register. Neither is a smi.
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__ movq(accumulator1(), accumulator0());
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clear_as_smi(accumulator1());
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Register value_scratch = other_accumulator(destination());
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__ RecordWrite(scratch0(), offset, value_scratch, scratch1());
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}
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} else if (destination().is(accumulator1())) {
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__ movq(accumulator1(), accumulator0());
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// Is a smi because we do not need the write barrier.
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set_as_smi(accumulator1());
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}
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}
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void FastCodeGenerator::EmitThisPropertyLoad(Handle<String> name) {
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ASSERT(!destination().is(no_reg));
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LookupResult lookup;
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info()->receiver()->Lookup(*name, &lookup);
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ASSERT(lookup.holder() == *info()->receiver());
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ASSERT(lookup.type() == FIELD);
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Handle<Map> map(Handle<HeapObject>::cast(info()->receiver())->map());
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int index = lookup.GetFieldIndex() - map->inobject_properties();
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int offset = index * kPointerSize;
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// Perform the load. Negative offsets are inobject properties.
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if (offset < 0) {
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offset += map->instance_size();
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__ movq(destination(), FieldOperand(receiver_reg(), offset));
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} else {
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offset += FixedArray::kHeaderSize;
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__ movq(scratch0(),
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FieldOperand(receiver_reg(), JSObject::kPropertiesOffset));
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__ movq(destination(), FieldOperand(scratch0(), offset));
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}
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// The loaded value is not known to be a smi.
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clear_as_smi(destination());
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}
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void FastCodeGenerator::EmitBitOr() {
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if (is_smi(accumulator0()) && is_smi(accumulator1())) {
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// If both operands are known to be a smi then there is no need to check
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// the operands or result.
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if (destination().is(no_reg)) {
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__ or_(accumulator1(), accumulator0());
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} else {
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// Leave the result in the destination register. Bitwise or is
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// commutative.
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__ or_(destination(), other_accumulator(destination()));
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}
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} else {
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// Left is in accumulator1, right in accumulator0.
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if (destination().is(accumulator0())) {
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__ movq(scratch0(), accumulator0());
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__ or_(destination(), accumulator1()); // Or is commutative.
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Label* bailout =
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info()->AddBailout(accumulator1(), scratch0()); // Left, right.
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__ JumpIfNotSmi(destination(), bailout);
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} else if (destination().is(accumulator1())) {
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__ movq(scratch0(), accumulator1());
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__ or_(destination(), accumulator0());
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Label* bailout = info()->AddBailout(scratch0(), accumulator0());
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__ JumpIfNotSmi(destination(), bailout);
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} else {
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ASSERT(destination().is(no_reg));
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__ movq(scratch0(), accumulator1());
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__ or_(scratch0(), accumulator0());
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Label* bailout = info()->AddBailout(accumulator1(), accumulator0());
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__ JumpIfNotSmi(scratch0(), bailout);
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}
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}
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// If we didn't bailout, the result (in fact, both inputs too) is known to
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// be a smi.
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set_as_smi(accumulator0());
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set_as_smi(accumulator1());
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}
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void FastCodeGenerator::Generate(CompilationInfo* compilation_info) {
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ASSERT(info_ == NULL);
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info_ = compilation_info;
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Comment cmnt(masm_, "[ function compiled by fast code generator");
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// Save the caller's frame pointer and set up our own.
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Comment prologue_cmnt(masm(), ";; Prologue");
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__ push(rbp);
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__ movq(rbp, rsp);
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__ push(rsi); // Context.
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__ push(rdi); // Closure.
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// Note that we keep a live register reference to esi (context) at this
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// point.
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Label* bailout_to_beginning = info()->AddBailout();
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// Receiver (this) is allocated to a fixed register.
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if (info()->has_this_properties()) {
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Comment cmnt(masm(), ";; MapCheck(this)");
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if (FLAG_print_ir) {
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PrintF("MapCheck(this)\n");
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}
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ASSERT(info()->has_receiver() && info()->receiver()->IsHeapObject());
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Handle<HeapObject> object = Handle<HeapObject>::cast(info()->receiver());
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Handle<Map> map(object->map());
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EmitLoadReceiver();
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__ CheckMap(receiver_reg(), map, bailout_to_beginning, false);
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}
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// If there is a global variable access check if the global object is the
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// same as at lazy-compilation time.
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if (info()->has_globals()) {
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Comment cmnt(masm(), ";; MapCheck(GLOBAL)");
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if (FLAG_print_ir) {
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PrintF("MapCheck(GLOBAL)\n");
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}
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ASSERT(info()->has_global_object());
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Handle<Map> map(info()->global_object()->map());
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__ movq(scratch0(), CodeGenerator::GlobalObject());
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__ CheckMap(scratch0(), map, bailout_to_beginning, true);
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}
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VisitStatements(info()->function()->body());
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Comment return_cmnt(masm(), ";; Return(<undefined>)");
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if (FLAG_print_ir) {
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PrintF("Return(<undefined>)\n");
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}
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__ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
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__ movq(rsp, rbp);
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__ pop(rbp);
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__ ret((scope()->num_parameters() + 1) * kPointerSize);
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}
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#undef __
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} } // namespace v8::internal
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#endif // V8_TARGET_ARCH_X64
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