Subzero: Prototype to simplify makereg calls

src/IceTargetLoweringMIPS32.h

Index: src/IceTargetLoweringMIPS32.h
diff --git a/src/IceTargetLoweringMIPS32.h b/src/IceTargetLoweringMIPS32.h
index 08897e8d8844eccb73958f6fd34cae26e82a0998..b4afe4290287395cf045892e722d19fc64a73dc4 100644
--- a/src/IceTargetLoweringMIPS32.h
+++ b/src/IceTargetLoweringMIPS32.h
@@ -227,6 +227,11 @@ public:
   Variable *legalizeToReg(Operand *From, RegNumT RegNum = RegNumT());
 
   Variable *makeReg(Type Ty, RegNumT RegNum = RegNumT());
+
+  Variable *I32Reg(RegNumT RegNum = RegNumT()) {
+    return makeReg(IceType_i32, RegNum);
+  }
+
   static Type stackSlotType();
   Variable *copyToReg(Operand *Src, RegNumT RegNum = RegNumT());