[llvm] [DAGCombiner][VP] Add DAGCombine for VP_MUL (PR #80105)
Simon Pilgrim via llvm-commits
llvm-commits at lists.llvm.org
Fri Feb 2 03:26:42 PST 2024
================
@@ -4404,20 +4408,21 @@ SDValue DAGCombiner::visitMUL(SDNode *N) {
if (N1IsConst && ConstValue1.isOne())
return N0;
- if (SDValue NewSel = foldBinOpIntoSelect(N))
- return NewSel;
+ if (!IsVP)
+ if (SDValue NewSel = foldBinOpIntoSelect(N))
+ return NewSel;
// fold (mul x, -1) -> 0-x
if (N1IsConst && ConstValue1.isAllOnes())
- return DAG.getNegative(N0, DL, VT);
+ return Matcher.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, DL, VT), N0);
----------------
RKSimon wrote:
Losing helpers like this is going to get annoying very quickly :(
https://github.com/llvm/llvm-project/pull/80105
More information about the llvm-commits
mailing list