diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index fba2aa9cb52..e6ea4898717 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -3128,8 +3128,11 @@ static SDValue simplifyDivRem(SDNode *N, SelectionDAG &DAG) { if (N0.isUndef()) return DAG.getConstant(0, DL, VT); - // TODO: 0 / X -> 0 - // TODO: 0 % X -> 0 + // 0 / X -> 0 + // 0 % X -> 0 + ConstantSDNode *N0C = isConstOrConstSplat(N0); + if (N0C && N0C->isNullValue()) + return N0; // X / X -> 1 // X % X -> 0 |
