MIPS: Fix Cluster Fuzz stack frame corruption bug.

src/mips/code-stubs-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 4790 matching lines @@
 
   // The target function is the Array constructor.
   // Create an AllocationSite if we don't already have it, store it in the cell.
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
     const RegList kSavedRegs =
         1 << 4  |  // a0
         1 << 5  |  // a1
         1 << 6;    // a2
 
+    __ SmiTag(a0);
     __ MultiPush(kSavedRegs);
 
     CreateAllocationSiteStub create_stub;
     __ CallStub(&create_stub);
 
     __ MultiPop(kSavedRegs);
+    __ SmiUntag(a0);
   }
   __ Branch(&done);
 
   __ bind(&not_array_function);
   __ sw(a1, FieldMemOperand(a2, Cell::kValueOffset));
   // No need for a write barrier here - cells are rescanned.
 
   __ bind(&done);
 }
 
@@ skipping 2752 matching lines @@
   __ bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS