[llvm] r299361 - [DAGCombiner] Check limits before accessing array element (PR32502)

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Mon Apr  3 10:27:49 2017
New Revision: 299361

URL: http://llvm.org/viewvc/llvm-project?rev=299361&view=rev
Log:
[DAGCombiner] Check limits before accessing array element (PR32502)

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp?rev=299361&r1=299360&r2=299361&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Mon Apr  3 10:27:49 2017
@@ -1661,7 +1661,7 @@ SDValue DAGCombiner::visitTokenFactor(SD
       Changed = true;
       DidPruneOps = true;
       unsigned OrigOpNumber = 0;
-      while (Ops[OrigOpNumber].getNode() != Op && OrigOpNumber < Ops.size())
+      while (OrigOpNumber < Ops.size() && Ops[OrigOpNumber].getNode() != Op)
         OrigOpNumber++;
       assert((OrigOpNumber != Ops.size()) &&
              "expected to find TokenFactor Operand");