MIPS: Fix ARM bug introduced in r12604 that caused crashes on ARM on crypto-md5 from SunSpider.

src/mips/ic-mips.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 1251 matching lines @@
   if (check_map == kCheckMap) {
     // Check for fast double array case. If this fails, call through to the
     // runtime.
     __ LoadRoot(at, Heap::kFixedDoubleArrayMapRootIndex);
     __ Branch(slow, ne, elements_map, Operand(at));
   }
   __ bind(&fast_double_without_map_check);
   __ StoreNumberToDoubleElements(value,
                                  key,
                                  receiver,
-                                 elements,
-                                 a3,
+                                 elements,  // Overwritten.
+                                 a3,        // Scratch regs...
                                  t0,
                                  t1,
                                  t2,
                                  &transition_double_elements);
   if (increment_length == kIncrementLength) {
     // Add 1 to receiver->length.
     __ Addu(scratch_value, key, Operand(Smi::FromInt(1)));
     __ sw(scratch_value, FieldMemOperand(receiver, JSArray::kLengthOffset));
   }
   __ Ret();
@@ skipping 503 matching lines @@
   } else {
     ASSERT(Assembler::IsBne(branch_instr));
     patcher.ChangeBranchCondition(eq);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS