| // 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(); |
| __ mov(reg, Operand(ebp, index * kPointerSize)); |
| } |
| |
| |
| void FastCodeGenerator::EmitReceiverMapCheck() { |
| Comment cmnt(masm(), ";; MapCheck(this)"); |
| if (FLAG_print_ir) { |
| PrintF("MapCheck(this)\n"); |
| } |
| |
| EmitLoadReceiver(edx); |
| __ test(edx, Immediate(kSmiTagMask)); |
| __ j(zero, bailout()); |
| |
| ASSERT(has_receiver() && receiver()->IsHeapObject()); |
| Handle<HeapObject> object = Handle<HeapObject>::cast(receiver()); |
| Handle<Map> map(object->map()); |
| __ cmp(FieldOperand(edx, HeapObject::kMapOffset), Immediate(map)); |
| __ j(not_equal, bailout()); |
| } |
| |
| |
| void FastCodeGenerator::EmitGlobalVariableLoad(Handle<String> name) { |
| // Compile global variable accesses as load IC calls. The only live |
| // registers are esi (context) and possibly edx (this). Both are also |
| // saved in the stack and esi is preserved by the call. |
| __ push(CodeGenerator::GlobalObject()); |
| __ mov(ecx, name); |
| Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize)); |
| __ call(ic, RelocInfo::CODE_TARGET_CONTEXT); |
| if (has_this_properties()) { |
| // Restore this. |
| EmitLoadReceiver(edx); |
| } else { |
| __ nop(); // Not test eax, 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(); |
| __ mov(ecx, edx); // Copy receiver for write barrier. |
| } else { |
| offset += FixedArray::kHeaderSize; |
| __ mov(ecx, FieldOperand(edx, JSObject::kPropertiesOffset)); |
| } |
| // Perform the store. |
| __ mov(FieldOperand(ecx, offset), eax); |
| // Preserve value from write barrier in case it's needed. |
| __ mov(ebx, eax); |
| __ RecordWrite(ecx, offset, ebx, edi); |
| } |
| |
| |
| 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(ebp); |
| __ mov(ebp, esp); |
| __ push(esi); // Context. |
| __ push(edi); // Closure. |
| // Note that we keep a live register reference to esi (context) at this |
| // point. |
| |
| // Receiver (this) is allocated to edx if there are this properties. |
| if (has_this_properties()) EmitReceiverMapCheck(); |
| |
| VisitStatements(fun->body()); |
| |
| Comment return_cmnt(masm(), ";; Return(<undefined>)"); |
| __ mov(eax, Factory::undefined_value()); |
| |
| Comment epilogue_cmnt(masm(), ";; Epilogue"); |
| __ mov(esp, ebp); |
| __ pop(ebp); |
| __ ret((fun->scope()->num_parameters() + 1) * kPointerSize); |
| |
| __ bind(&bailout_); |
| } |
| |
| |
| #undef __ |
| |
| |
| } } // namespace v8::internal |