commit 9a65a01eeb97cdc10ca6b97ade3f9f8aba11fa9f
author Evan Cheng <evan.cheng@apple.com> Thu Dec 13 01:34:32 2012 +0000
committer Evan Cheng <evan.cheng@apple.com> Thu Dec 13 01:34:32 2012 +0000
tree d376ded4c446a84b0834cee60526d031460ffb5e
parent b573539c6b47d020ade2e41c0ff3afcd00f294f4

Fix a bug in DAGCombiner::MatchBSwapHWord. Make sure the node has operands before referencing them. rdar://12868039

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170078 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/DAGCombiner.cpp

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 893cf20..7c54d17 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -2984,7 +2984,8 @@
   SDValue N00 = N0.getOperand(0);
   SDValue N01 = N0.getOperand(1);
 
-  if (N1.getOpcode() == ISD::OR) {
+  if (N1.getOpcode() == ISD::OR &&
+      N00.getNumOperands() == 2 && N01.getNumOperands() == 2) {
     // (or (or (and), (and)), (or (and), (and)))
     SDValue N000 = N00.getOperand(0);
     if (!isBSwapHWordElement(N000, Parts))