Remove scratch register requirement from LoadInstanceDescriptors on arm and mips.

src/arm/lithium-arm.h

 // 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 2380 matching lines @@
   explicit LForInPrepareMap(LOperand* object) {
     inputs_[0] = object;
   }
 
   LOperand* object() { return inputs_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(ForInPrepareMap, "for-in-prepare-map")
 };
 
 
-class LForInCacheArray: public LTemplateInstruction<1, 1, 1> {
+class LForInCacheArray: public LTemplateInstruction<1, 1, 0> {
  public:
-  explicit LForInCacheArray(LOperand* map, LOperand* scratch) {
+  explicit LForInCacheArray(LOperand* map) {
     inputs_[0] = map;
-    temps_[0] = scratch;
   }
 
   LOperand* map() { return inputs_[0]; }
-  LOperand* scratch() { return temps_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(ForInCacheArray, "for-in-cache-array")
 
   int idx() {
     return HForInCacheArray::cast(this->hydrogen_value())->idx();
   }
 };
 
 
 class LCheckMapValue: public LTemplateInstruction<0, 2, 0> {
@@ skipping 188 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_LITHIUM_ARM_H_