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 4c1710dd81..5d1b2a3ea2 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -4019,6 +4019,9 @@ SDValue DAGCombiner::visitFMUL(SDNode *N) { // fold (fmul A, 0) -> 0 if (UnsafeFPMath && N1CFP && N1CFP->getValueAPF().isZero()) return N1; + // fold (fmul A, 0) -> 0, vector edition. + if (UnsafeFPMath && ISD::isBuildVectorAllZeros(N1.getNode())) + return N1; // fold (fmul X, 2.0) -> (fadd X, X) if (N1CFP && N1CFP->isExactlyValue(+2.0)) return DAG.getNode(ISD::FADD, N->getDebugLoc(), VT, N0, N0); |