[all-commits] [llvm/llvm-project] eaf0d8: [LV] Disable fold tail by masking when IV is used ...

[Niwin Anto via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: eaf0d82529f30fd53b453886676821d67ccfe9af
      https://github.com/llvm/llvm-project/commit/eaf0d82529f30fd53b453886676821d67ccfe9af
  Author: Niwin Anto <niwinantop at gmail.com>
  Date:   2024-03-04 (Mon, 04 Mar 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorizationLegality.cpp
    M llvm/test/Transforms/LoopVectorize/no-fold-tail-by-masking-iv-external-uses.ll

  Log Message:
  -----------
  [LV] Disable fold tail by masking when IV is used outside (#81609)

When induction variable are used outside the loop body, tail folding
by masking mis-compiles, because for users outside of the loop the
final value of the induction is computed separately from the vector
loop.

Fixes https://github.com/llvm/llvm-project/issues/76069
Fixes https://github.com/llvm/llvm-project/issues/51677



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications