LLoadKeyed does not clobber double anymore.

src/ia32/lithium-ia32.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 1602 matching lines @@
   }
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   ElementsKind elements_kind() const {
     return hydrogen()->elements_kind();
   }
   bool is_external() const {
     return hydrogen()->is_external();
   }
 
-  virtual bool ClobbersDoubleRegisters() const V8_OVERRIDE {
-    return !CpuFeatures::IsSupported(SSE2) &&
-        !IsDoubleOrFloatElementsKind(hydrogen()->elements_kind());
-  }
-
   DECLARE_CONCRETE_INSTRUCTION(LoadKeyed, "load-keyed")
   DECLARE_HYDROGEN_ACCESSOR(LoadKeyed)
 
   virtual void PrintDataTo(StringStream* stream) V8_OVERRIDE;
   uint32_t additional_index() const { return hydrogen()->index_offset(); }
   bool key_is_smi() {
     return hydrogen()->key()->representation().IsTagged();
   }
 };
 
@@ skipping 1275 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_LITHIUM_IA32_H_