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Fix a codegen abort seen in 483.xalancbmk.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93417 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-01-14 03:08:49 +00:00
parent e8f422b9f3
commit ff00a55517
2 changed files with 23 additions and 0 deletions
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3
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@@ -1684,6 +1684,9 @@ SDValue DAGCombiner::SimplifyBinOpWithSameOpcodeHands(SDNode *N) {
EVT VT = N0.getValueType();
assert(N0.getOpcode() == N1.getOpcode() && "Bad input!");
// Bail early if none of these transforms apply.
if (N0.getNode()->getNumOperands() == 0) return SDValue();
// For each of OP in AND/OR/XOR:
// fold (OP (zext x), (zext y)) -> (zext (OP x, y))
// fold (OP (sext x), (sext y)) -> (sext (OP x, y))