DAGCombine: visitXOR can replace a node without returning it, bail out in that case.
Fixes the crash reported in PR15608.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178429 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 44d43a1..d1f476e 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -6823,9 +6823,9 @@
MVT::Other, Chain, Tmp, N2);
}
- // visitXOR has changed XOR's operands.
- Op0 = TheXor->getOperand(0);
- Op1 = TheXor->getOperand(1);
+ // visitXOR has changed XOR's operands or replaced the XOR completely,
+ // bail out.
+ return SDValue(N, 0);
}
}