Land two MIPS changes contributed by Paul Lind.

src/mips/ic-mips.cc

 // Copyright 2011 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 867 matching lines @@
   Label slow, notin;
   MemOperand mapped_location =
       GenerateMappedArgumentsLookup(masm, a1, a0, a2, a3, t0, &notin, &slow);
   __ lw(v0, mapped_location);
   __ Ret();
   __ bind(&notin);
   // The unmapped lookup expects that the parameter map is in a2.
   MemOperand unmapped_location =
       GenerateUnmappedArgumentsLookup(masm, a0, a2, a3, &slow);
   __ lw(a2, unmapped_location);
+  __ LoadRoot(a3, Heap::kTheHoleValueRootIndex);
   __ Branch(&slow, eq, a2, Operand(a3));
-  __ LoadRoot(a3, Heap::kTheHoleValueRootIndex);
   __ mov(v0, a2);
   __ Ret();
   __ bind(&slow);
   GenerateMiss(masm, false);
 }
 
 
 void KeyedStoreIC::GenerateNonStrictArguments(MacroAssembler* masm) {
   // ---------- S t a t e --------------
   //  -- a0     : value
@@ skipping 731 matching lines @@
     Register reg = Register::from_code(Assembler::GetRs(instr_at_patch));
     patcher.masm()->andi(at, reg, kSmiTagMask);
     patcher.ChangeBranchCondition(eq);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS