A64: Use a scope utility to allocate scratch registers.

src/a64/stub-cache-a64.cc

 // Copyright 2013 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 885 matching lines @@
       }
 
       if (depth != 1 || check == CHECK_ALL_MAPS) {
         __ CheckMap(map_reg, current_map, miss, DONT_DO_SMI_CHECK);
       }
 
       // Check access rights to the global object.  This has to happen after
       // the map check so that we know that the object is actually a global
       // object.
       if (current_map->IsJSGlobalProxyMap()) {
-        __ CheckAccessGlobalProxy(reg, scratch2, miss);
+        UseScratchRegisterScope temps(masm());
+        __ CheckAccessGlobalProxy(reg, scratch2, temps.AcquireX(), miss);
       } else if (current_map->IsJSGlobalObjectMap()) {
         GenerateCheckPropertyCell(
             masm(), Handle<JSGlobalObject>::cast(current), name,
             scratch2, miss);
       }
 
       reg = holder_reg;  // From now on the object will be in holder_reg.
 
       if (heap()->InNewSpace(*prototype)) {
         // The prototype is in new space; we cannot store a reference to it
@@ skipping 16 matching lines @@
   // Check the holder map.
   if (depth != 0 || check == CHECK_ALL_MAPS) {
     // Check the holder map.
     __ CheckMap(reg, scratch1, current_map, miss, DONT_DO_SMI_CHECK);
   }
 
   // Perform security check for access to the global object.
   ASSERT(current_map->IsJSGlobalProxyMap() ||
          !current_map->is_access_check_needed());
   if (current_map->IsJSGlobalProxyMap()) {
-    __ CheckAccessGlobalProxy(reg, scratch1, miss);
+    __ CheckAccessGlobalProxy(reg, scratch1, scratch2, miss);
   }
 
   // Return the register containing the holder.
   return reg;
 }
 
 
 void LoadStubCompiler::HandlerFrontendFooter(Handle<Name> name, Label* miss) {
   if (!miss->is_unused()) {
     Label success;
@@ skipping 585 matching lines @@
 
   // Miss case, call the runtime.
   __ Bind(&miss);
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64