Enable stub generation using Hydrogen/Lithium (again)

src/x64/code-stubs-x64.cc

 // Copyright 2012 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 18 matching lines @@
 
 #if defined(V8_TARGET_ARCH_X64)
 
 #include "bootstrapper.h"
 #include "code-stubs.h"
 #include "regexp-macro-assembler.h"
 
 namespace v8 {
 namespace internal {
 
+
+CodeStubInterfaceDescriptor*
+    KeyedLoadFastElementStub::GetInterfaceDescriptor(Isolate* isolate) {
+  static CodeStubInterfaceDescriptor* result = NULL;
+  if (result == NULL) {
+    Handle<Code> miss = isolate->builtins()->KeyedLoadIC_Miss();
+    static Register registers[] = { rdx, rax };
+    static CodeStubInterfaceDescriptor info = {
+      2,
+      registers,
+      miss
+    };
+    result = &info;
+  }
+  return result;
+}
+
+
 #define __ ACCESS_MASM(masm)
 
 void ToNumberStub::Generate(MacroAssembler* masm) {
   // The ToNumber stub takes one argument in eax.
   Label check_heap_number, call_builtin;
   __ SmiTest(rax);
   __ j(not_zero, &check_heap_number, Label::kNear);
   __ Ret();
 
   __ bind(&check_heap_number);
@@ skipping 6420 matching lines @@
 #endif
 
   __ Ret();
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64