commit bf0baa9de7f84cbd9fdd810aa5ae3566bad52596
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 2864811df9e3c6fa94c198313769ecaae3011c56
parent 79e1cdb00b85e9459b12df2f5fa692b490da5f36

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

llvm-svn: 170078

llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 893cf20..7c54d17 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/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))