[all-commits] [llvm/llvm-project] eda3c9: [LoopFuse] Ensure loops are in loop simplified for...

[MengXuan Cai via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: eda3c93486ca113f63ccf8f28ca9c0ea90c09386
      https://github.com/llvm/llvm-project/commit/eda3c93486ca113f63ccf8f28ca9c0ea90c09386
  Author: Mengxuan Cai <mengxuan.cai at huawei.com>
  Date:   2022-10-31 (Mon, 31 Oct 2022)

  Changed paths:
    M llvm/lib/Transforms/Scalar/LoopFuse.cpp
    A llvm/test/Transforms/LoopFusion/ensure_loop_simplify_form.ll

  Log Message:
  -----------
  [LoopFuse] Ensure loops are in loop simplified form under new PM

Loop Fusion (Function Pass) requires loops in simplified form. With
legacy-pm, loop-simplify pass is added as a dependency for loop-fusion.
But the new pass manager does not always ensure this format. This patch
tries to invoke simplifyLoop() on loops that are not in simplified form
only for new PM.

Reviewed By: aeubanks

Differential Revision: https://reviews.llvm.org/D136781