Selectively invert ICMP operands for better address optimization

src/IceInst.h

Index: src/IceInst.h
diff --git a/src/IceInst.h b/src/IceInst.h
index 029fcc59079c01a76f76b9567d8477ac70331945..062d43ded6022579dc77db04668b736b223248af 100644
--- a/src/IceInst.h
+++ b/src/IceInst.h
@@ -550,6 +550,7 @@ public:
         InstIcmp(Func, Condition, Dest, Source1, Source2);
   }
   ICond getCondition() const { return Condition; }
+  void setCondition(ICond Cond) { Condition = Cond; }
   bool isMemoryWrite() const override { return false; }
   void dump(const Cfg *Func) const override;
   static bool classof(const Inst *Instr) { return Instr->getKind() == Icmp; }
@@ -558,7 +559,7 @@ private:
   InstIcmp(Cfg *Func, ICond Condition, Variable *Dest, Operand *Source1,
            Operand *Source2);
 
-  const ICond Condition;
+  ICond Condition;
 };
 
 /// InsertElement instruction.