[llvm] [DAG] fold avgu(zext(x), zext(y)) -> zext(avgu(x, y)) (PR #95134)
via llvm-commits
llvm-commits at lists.llvm.org
Tue Jun 11 08:57:41 PDT 2024
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@@ -5236,6 +5236,21 @@ SDValue DAGCombiner::visitAVG(SDNode *N) {
return DAG.getNode(ISD::SRL, DL, VT, X,
DAG.getShiftAmountConstant(1, VT, DL));
+ // fold avgu(zext(x), zext(y)) -> zext(avgu(x, y))
+ SDValue A;
+ SDValue B;
+ if (hasOperation(ISD::AVGFLOORU, VT) &&
+ sd_match(N, m_c_BinOp(ISD::AVGFLOORU, m_ZExt(m_Value(A)),
+ m_ZExt(m_Value(B))))) {
+ SDValue AvgFloorU = DAG.getNode(ISD::AVGFLOORU, DL, A.getValueType(), A, B);
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c8ef wrote:
Thank you for bringing this to my attention! Fixed.
https://github.com/llvm/llvm-project/pull/95134
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