diff options
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index de3aefadb2b..aaff88ab5ea 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -3076,6 +3076,11 @@ static SDValue simplifyDivRem(SDNode *N, SelectionDAG &DAG) { EVT VT = N->getValueType(0); SDLoc DL(N); + // X / undef -> undef + // X % undef -> undef + // X / 0 -> undef + // X % 0 -> undef + // NOTE: This includes vectors where any divisor element is zero/undef. if (DAG.isUndef(N->getOpcode(), {N0, N1})) return DAG.getUNDEF(VT); |
