[llvm] [DAGCombiner] Add support for scalarising extracts of a vector setcc (PR #116031)
Paul Walker via llvm-commits
llvm-commits at lists.llvm.org
Wed Nov 20 10:28:38 PST 2024
================
@@ -23008,9 +23037,14 @@ SDValue DAGCombiner::visitEXTRACT_VECTOR_ELT(SDNode *N) {
}
}
- if (SDValue BO = scalarizeExtractedBinop(N, DAG, DL, LegalOperations))
+ if (SDValue BO = scalarizeExtractedBinOp(N, DAG, DL))
return BO;
+ // extract (setcc x, splat(y)), i -> setcc (extract x, i)), y
+ if (ScalarVT == VecVT.getVectorElementType())
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paulwalker-arm wrote:
This looks like the sort of restriction that belongs inside `scalarizeExtractedSetCC`?
https://github.com/llvm/llvm-project/pull/116031
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