[llvm] [SLP] Support ordered FAdd reductions in SLPVectorizer (PR #146570)
Alexey Bataev via llvm-commits
llvm-commits at lists.llvm.org
Thu Aug 28 07:15:51 PDT 2025
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@@ -22423,7 +22552,7 @@ class HorizontalReduction {
// original scalar identity operations on matched horizontal reductions).
IsSupportedHorRdxIdentityOp = RdxKind != RecurKind::Mul &&
RdxKind != RecurKind::FMul &&
- RdxKind != RecurKind::FMulAdd;
+ RdxKind != RecurKind::FMulAdd && !isOrderedFaddReduction();
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alexey-bataev wrote:
It would be good to split this function and have separate functions for associative/non-associative reductions to simplify maintenance.
I would start with moving some associative-specific parts into separate functions and implemnent non-associative parts also in a separate util functions
https://github.com/llvm/llvm-project/pull/146570
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