llvm-project

f3861169 - [SLP] Apply reused-scalar reduction counters at the vectorized lane

[SLP] Apply reused-scalar reduction counters at the vectorized lane The horizontal reduction reuse-counter scale was placed by deduplicated candidate order, but the emitted reduction vector lane order is defined by the root node, which may be reordered or split (SplitVectorize). As a result a repeat count could be applied to the wrong lane, producing a wrong reduction result. Place each counter at the lane the matching candidate is vectorized to. Fixes #206476 Reviewers: Pull Request: https://github.com/llvm/llvm-project/pull/206611