Revert r178166. According to Howard, this code is actually ok.

llvm-svn: 178319

llvm/utils/TableGen/CodeGenSchedule.cpp

@@ -1105,9 +1105,7 @@ void PredTransitions::getIntersectingVariants(
       // Push another copy of the current transition for more variants.
       Variant.TransVecIdx = TransVec.size();
       IntersectingVariants.push_back(Variant);
-
-      PredTransition Trans = TransVec[TransIdx];
-      TransVec.push_back(Trans);
+      TransVec.push_back(TransVec[TransIdx]);
     }
   }
 }