[all-commits] [llvm/llvm-project] 31d4c9: [LoopVectorize] LLVM fails to vectorise loops with...

[Dinar Temirbulatov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 31d4c9750694fa3728e45cbd6f740063ee19a6fa
      https://github.com/llvm/llvm-project/commit/31d4c9750694fa3728e45cbd6f740063ee19a6fa
  Author: Dinar Temirbulatov <Dinar.Temirbulatov at arm.com>
  Date:   2024-07-15 (Mon, 15 Jul 2024)

  Changed paths:
    M llvm/lib/Analysis/IVDescriptors.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/select-costs.ll
    A llvm/test/Transforms/LoopVectorize/select-cmp-multiuse.ll
    M llvm/test/Transforms/LoopVectorize/select-cmp.ll

  Log Message:
  -----------
  [LoopVectorize] LLVM fails to vectorise loops with multi-bool varables (#89226)

This change allows to consider compare instructions in the loop with
multiple use inside the loop and outside.

This change allows to vectorise this loop:
int foo(float* a, int n) {
  _Bool any = 0;
  _Bool all = 1;
  for (int i = 0; i < n; i++) {
    if (a[i] < 0.0f) {
      any = 1;
    } else {
      all = 0;
    }
  }
  return all ? 1 : any ? 2 : 3;
}



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