X64: Add the global object as parameter to the GlobalReceiver instruction

Review URL: http://codereview.chromium.org/6674053

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7222 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/x64/lithium-codegen-x64.cc

@@ -2354,9 +2354,9 @@ void LCodeGen::DoGlobalObject(LGlobalObject* instr) {
 
 
 void LCodeGen::DoGlobalReceiver(LGlobalReceiver* instr) {
+  Register global = ToRegister(instr->global());
   Register result = ToRegister(instr->result());
-  __ movq(result, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX)));
-  __ movq(result, FieldOperand(result, GlobalObject::kGlobalReceiverOffset));
+  __ movq(result, FieldOperand(global, GlobalObject::kGlobalReceiverOffset));
 }
 
 

src/x64/lithium-x64.cc

@@ -1199,7 +1199,8 @@ LInstruction* LChunkBuilder::DoGlobalObject(HGlobalObject* instr) {
 
 
 LInstruction* LChunkBuilder::DoGlobalReceiver(HGlobalReceiver* instr) {
-  return DefineAsRegister(new LGlobalReceiver);
+  LOperand* global_object = UseRegisterAtStart(instr->value());
+  return DefineAsRegister(new LGlobalReceiver(global_object));
 }
 
 

src/x64/lithium-x64.h

@@ -1331,9 +1331,15 @@ class LGlobalObject: public LTemplateInstruction<1, 0, 0> {
 };
 
 
-class LGlobalReceiver: public LTemplateInstruction<1, 0, 0> {
+class LGlobalReceiver: public LTemplateInstruction<1, 1, 0> {
  public:
+  explicit LGlobalReceiver(LOperand* global_object) {
+    inputs_[0] = global_object;
+  }
+
   DECLARE_CONCRETE_INSTRUCTION(GlobalReceiver, "global-receiver")
+
+  LOperand* global() { return InputAt(0); }
 };