Simplify UnaryOpStub a little bit.

src/mips/code-stubs-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 1828 matching lines @@
       break;
     case UnaryOpIC::GENERIC:
       GenerateGenericStub(masm);
       break;
   }
 }
 
 
 void UnaryOpStub::GenerateTypeTransition(MacroAssembler* masm) {
   // Argument is in a0 and v0 at this point, so we can overwrite a0.
-  // Push this stub's key. Although the operation and the type info are
-  // encoded into the key, the encoding is opaque, so push them too.
-  __ li(a2, Operand(Smi::FromInt(MinorKey())));
-  __ li(a1, Operand(Smi::FromInt(op_)));
+  __ li(a2, Operand(Smi::FromInt(op_)));
+  __ li(a1, Operand(Smi::FromInt(mode_)));
   __ li(a0, Operand(Smi::FromInt(operand_type_)));
-
   __ Push(v0, a2, a1, a0);
 
   __ TailCallExternalReference(
-      ExternalReference(IC_Utility(IC::kUnaryOp_Patch),
-                        masm->isolate()),
-      4,
-      1);
+      ExternalReference(IC_Utility(IC::kUnaryOp_Patch), masm->isolate()), 4, 1);
 }
 
 
 // TODO(svenpanne): Use virtual functions instead of switch.
 void UnaryOpStub::GenerateSmiStub(MacroAssembler* masm) {
   switch (op_) {
     case Token::SUB:
       GenerateSmiStubSub(masm);
       break;
     case Token::BIT_NOT:
@@ skipping 5014 matching lines @@
   __ mov(result, zero_reg);
   __ Ret();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS