[llvm] [DAGCombiner] Add combine avg from shifts (PR #113909)
Sam Parker via llvm-commits
llvm-commits at lists.llvm.org
Mon Oct 28 07:00:17 PDT 2024
================
@@ -11393,6 +11413,56 @@ static SDValue combineMinNumMaxNumImpl(const SDLoc &DL, EVT VT, SDValue LHS,
}
}
+SDValue DAGCombiner::combineAVG(SDNode *N) {
+ const auto Opcode = N->getOpcode();
+
+ // Convert (sr[al] (add n[su]w x, y)) -> (avgfloor[su] x, y)
+ if (Opcode != ISD::SRA && Opcode != ISD::SRL)
+ return SDValue();
+
+ unsigned FloorISD = 0;
+ auto VT = N->getValueType(0);
+ unsigned Shift = N->getOpcode();
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sparker-arm wrote:
`Opcode` has already been assigned this.
https://github.com/llvm/llvm-project/pull/113909
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