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// Copyright 2010 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "v8.h"
#include "codegen-inl.h"
#include "fast-codegen.h"
namespace v8 {
namespace internal {
#define __ ACCESS_MASM(masm())
void FastCodeGenerator::EmitLoadReceiver(Register reg) {
// Offset 2 is due to return address and saved frame pointer.
int index = 2 + function()->scope()->num_parameters();
__ movq(reg, Operand(rbp, index * kPointerSize));
}
void FastCodeGenerator::EmitReceiverMapCheck() {
Comment cmnt(masm(), ";; MapCheck(this)");
if (FLAG_print_ir) {
PrintF("MapCheck(this)\n");
}
EmitLoadReceiver(rdx);
__ JumpIfSmi(rdx, bailout());
ASSERT(has_receiver() && receiver()->IsHeapObject());
Handle<HeapObject> object = Handle<HeapObject>::cast(receiver());
Handle<Map> map(object->map());
__ Cmp(FieldOperand(rdx, HeapObject::kMapOffset), map);
__ j(not_equal, bailout());
}
void FastCodeGenerator::EmitGlobalVariableLoad(Handle<String> name) {
// Compile global variable accesses as load IC calls. The only live
// registers are rsi (context) and possibly rdx (this). Both are also
// saved in the stack and rsi is preserved by the call.
__ push(CodeGenerator::GlobalObject());
__ Move(rcx, name);
Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize));
__ Call(ic, RelocInfo::CODE_TARGET_CONTEXT);
if (has_this_properties()) {
// Restore this.
EmitLoadReceiver(rdx);
} else {
__ nop(); // Not test rax, indicates IC has no inlined code at call site.
}
}
void FastCodeGenerator::EmitThisPropertyStore(Handle<String> name) {
LookupResult lookup;
receiver()->Lookup(*name, &lookup);
ASSERT(lookup.holder() == *receiver());
ASSERT(lookup.type() == FIELD);
Handle<Map> map(Handle<HeapObject>::cast(receiver())->map());
int index = lookup.GetFieldIndex() - map->inobject_properties();
int offset = index * kPointerSize;
// Negative offsets are inobject properties.
if (offset < 0) {
offset += map->instance_size();
__ movq(rcx, rdx); // Copy receiver for write barrier.
} else {
offset += FixedArray::kHeaderSize;
__ movq(rcx, FieldOperand(rdx, JSObject::kPropertiesOffset));
}
// Perform the store.
__ movq(FieldOperand(rcx, offset), rax);
// Preserve value from write barrier in case it's needed.
__ movq(rbx, rax);
__ RecordWrite(rcx, offset, rbx, rdi);
}
void FastCodeGenerator::Generate(FunctionLiteral* fun, CompilationInfo* info) {
ASSERT(function_ == NULL);
ASSERT(info_ == NULL);
function_ = fun;
info_ = info;
// Save the caller's frame pointer and set up our own.
Comment prologue_cmnt(masm(), ";; Prologue");
__ push(rbp);
__ movq(rbp, rsp);
__ push(rsi); // Context.
__ push(rdi); // Closure.
// Note that we keep a live register reference to esi (context) at this
// point.
// Receiver (this) is allocated to rdx if there are this properties.
if (has_this_properties()) EmitReceiverMapCheck();
VisitStatements(fun->body());
Comment return_cmnt(masm(), ";; Return(<undefined>)");
__ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
Comment epilogue_cmnt(masm(), ";; Epilogue");
__ movq(rsp, rbp);
__ pop(rbp);
__ ret((fun->scope()->num_parameters() + 1) * kPointerSize);
__ bind(&bailout_);
}
#undef __
} } // namespace v8::internal
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