MIPS: Cleanup: use JumpIf[Not]Smi() whenever we can

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 509 matching lines @@
 
     // Move result to a1 and leave the internal frame.
     __ mov(a1, v0);
   }
 
   // Check if the receiver is a global object of some sort.
   // This can happen only for regular CallIC but not KeyedCallIC.
   if (id == IC::kCallIC_Miss) {
     Label invoke, global;
     __ lw(a2, MemOperand(sp, argc * kPointerSize));
-    __ andi(t0, a2, kSmiTagMask);
-    __ Branch(&invoke, eq, t0, Operand(zero_reg));
+    __ JumpIfSmi(a2, &invoke);
     __ GetObjectType(a2, a3, a3);
     __ Branch(&global, eq, a3, Operand(JS_GLOBAL_OBJECT_TYPE));
     __ Branch(&invoke, ne, a3, Operand(JS_BUILTINS_OBJECT_TYPE));
 
     // Patch the receiver on the stack.
     __ bind(&global);
     __ lw(a2, FieldMemOperand(a2, GlobalObject::kGlobalReceiverOffset));
     __ sw(a2, MemOperand(sp, argc * kPointerSize));
     __ bind(&invoke);
   }
@@ skipping 1130 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