diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 762fcedc7f..6b35126a10 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -1010,6 +1010,9 @@ SDValue DAGCombiner::visitADD(SDNode *N) { // fold (A+(B-A)) -> B if (N1.getOpcode() == ISD::SUB && N0 == N1.getOperand(1)) return N1.getOperand(0); + // fold ((B-A)+A) -> B + if (N0.getOpcode() == ISD::SUB && N1 == N0.getOperand(1)) + return N0.getOperand(0); if (!VT.isVector() && SimplifyDemandedBits(SDValue(N, 0))) return SDValue(N, 0); |