[all-commits] [llvm/llvm-project] 9720be: [LV][EVL] Disable fixed-order recurrence idiom wit...

Mel Chen via All-commits all-commits at lists.llvm.org
Fri Jan 17 00:55:58 PST 2025


  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9720be95d63ce797437015d0f0edd10b02e80b7a
      https://github.com/llvm/llvm-project/commit/9720be95d63ce797437015d0f0edd10b02e80b7a
  Author: Mel Chen <mel.chen at sifive.com>
  Date:   2025-01-17 (Fri, 17 Jan 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/test/Transforms/LoopVectorize/RISCV/vectorize-force-tail-with-evl-fixed-order-recurrence.ll

  Log Message:
  -----------
  [LV][EVL] Disable fixed-order recurrence idiom with EVL tail folding. (#122458)

The currently llvm.splice may occurs unexpected behavior if the evl of
the second-to-last iteration is not VF*UF.

Issue #122461



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