[SubZero] Fix floating-point comparison for MIPS

src/IceTargetLoweringMIPS32.h

Index: src/IceTargetLoweringMIPS32.h
diff --git a/src/IceTargetLoweringMIPS32.h b/src/IceTargetLoweringMIPS32.h
index 5f3de513e72d1b24fa58090a0361d21816736ddf..7e87f0435ad41c4d8498f117e02b210005419155 100644
--- a/src/IceTargetLoweringMIPS32.h
+++ b/src/IceTargetLoweringMIPS32.h
@@ -357,7 +357,8 @@ public:
   }
 
   void _movf(Variable *Src0, Variable *Src1, Operand *FCC) {
-    Context.insert<InstMIPS32Movf>(Src0, Src1, FCC);
+    auto *Instr = Context.insert<InstMIPS32Movf>(Src0, Src1, FCC);
+    Instr->setDestRedefined();

[Jim Stichnoth, 2016/09/21 17:07:10]

Sorry, I missed this the first time.

You should be able to avoid calling setDestRedefined() if you modify
TargetMIPS32::postLower() to call TargetLowering::markRedefinitions() in the -O2
case.

[jaydeep.patil, 2016/09/22 03:07:58]

Done.

   }
 
   void _movn(Variable *Dest, Variable *Src0, Variable *Src1) {
@@ -373,7 +374,8 @@ public:
   }
 
   void _movt(Variable *Src0, Variable *Src1, Operand *FCC) {
-    Context.insert<InstMIPS32Movt>(Src0, Src1, FCC);
+    auto *Instr = Context.insert<InstMIPS32Movt>(Src0, Src1, FCC);
+    Instr->setDestRedefined();
   }
 
   void _movz(Variable *Dest, Variable *Src0, Variable *Src1) {