Optimize %ClassOf() on IA-32 and use it instead of the...

src/x64/codegen-x64.cc

 // Copyright 2009 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
@@ skipping 3412 matching lines @@
 
 void CodeGenerator::GenerateRandomPositiveSmi(ZoneList<Expression*>* a) {
   UNIMPLEMENTED();
 }
 
 void CodeGenerator::GenerateFastMathOp(MathOp op, ZoneList<Expression*>* args) {
   UNIMPLEMENTED();
 }
 
 
+void CodeGenerator::GenerateClassOf(ZoneList<Expression*>* args) {
+  // TODO(X64): Optimize this like it's done on IA-32.
+  ASSERT(args->length() == 1);
+  Load(args->at(0));  // Load the object.
+  Result result = frame_->CallRuntime(Runtime::kClassOf, 1);
+  frame_->Push(&result);
+}
+
+
 void CodeGenerator::GenerateSetValueOf(ZoneList<Expression*>* args) {
   ASSERT(args->length() == 2);
   JumpTarget leave;
   Load(args->at(0));  // Load the object.
   Load(args->at(1));  // Load the value.
   Result value = frame_->Pop();
   Result object = frame_->Pop();
   value.ToRegister();
   object.ToRegister();
 
@@ skipping 3355 matching lines @@
       break;
     default:
       UNREACHABLE();
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal