MIPS64: Correct register use.

src/mips64/codegen-mips64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/codegen.h"
 #include "src/macro-assembler.h"
@@ skipping 551 matching lines @@
   ASSERT(!AreAliased(receiver, key, value, target_map,
                      scratch_elements));
 
   if (mode == TRACK_ALLOCATION_SITE) {
     __ JumpIfJSArrayHasAllocationMemento(
         receiver, scratch_elements, allocation_memento_found);
   }
 
   // Set transitioned map.
   __ sd(target_map, FieldMemOperand(receiver, HeapObject::kMapOffset));
-  __ RecordWriteField(a2,
+  __ RecordWriteField(receiver,
                       HeapObject::kMapOffset,
                       target_map,
                       t1,
                       kRAHasNotBeenSaved,
                       kDontSaveFPRegs,
                       EMIT_REMEMBERED_SET,
                       OMIT_SMI_CHECK);
 }
 
 
@@ skipping 549 matching lines @@
     patcher.masm()->nop();  // Pad the empty space.
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS64