[all-commits] [llvm/llvm-project] fdd8c1: [ARM] Delay reverting WLS in arm-block-placement

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fdd8c10959544c14ddcf874fd9c2841a8bea1d21
      https://github.com/llvm/llvm-project/commit/fdd8c10959544c14ddcf874fd9c2841a8bea1d21
  Author: David Green <david.green at arm.com>
  Date:   2021-09-28 (Tue, 28 Sep 2021)

  Changed paths:
    M llvm/lib/Target/ARM/ARMBlockPlacement.cpp
    A llvm/test/CodeGen/Thumb2/LowOverheadLoops/wls-revert-placement.mir

  Log Message:
  -----------
  [ARM] Delay reverting WLS in arm-block-placement

As we have to split blocks, we may be left in an invalid loop state
after a WLS is reverted to a DLS. Instead remember the WLS that could
not be fixed and revert them after finishing processing all other loops.

Differential Revision: https://reviews.llvm.org/D110567