[llvm] r178166 - Avoid undefined behavior from passing a std::vector's own contents

[Dan Gohman]

Author: djg
Date: Wed Mar 27 13:44:56 2013
New Revision: 178166

URL: http://llvm.org/viewvc/llvm-project?rev=178166&view=rev
Log:
Avoid undefined behavior from passing a std::vector's own contents
in as an argument to push_back.

Modified:
    llvm/trunk/utils/TableGen/CodeGenSchedule.cpp

Modified: llvm/trunk/utils/TableGen/CodeGenSchedule.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/TableGen/CodeGenSchedule.cpp?rev=178166&r1=178165&r2=178166&view=diff
==============================================================================
--- llvm/trunk/utils/TableGen/CodeGenSchedule.cpp (original)
+++ llvm/trunk/utils/TableGen/CodeGenSchedule.cpp Wed Mar 27 13:44:56 2013
@@ -1105,7 +1105,9 @@ void PredTransitions::getIntersectingVar
       // Push another copy of the current transition for more variants.
       Variant.TransVecIdx = TransVec.size();
       IntersectingVariants.push_back(Variant);
-      TransVec.push_back(TransVec[TransIdx]);
+
+      PredTransition Trans = TransVec[TransIdx];
+      TransVec.push_back(Trans);
     }
   }
 }