[all-commits] [llvm/llvm-project] eb5d79: [InstCombine] Allow KnownBits to be propagated

[Paulo Matos via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: eb5d79876a0963e39fdafaa9a9485c3800068932
      https://github.com/llvm/llvm-project/commit/eb5d79876a0963e39fdafaa9a9485c3800068932
  Author: Paulo Matos <pmatos at igalia.com>
  Date:   2023-07-18 (Tue, 18 Jul 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
    A llvm/test/Transforms/InstCombine/2023-07-13-arm-infiniteloop.ll

  Log Message:
  -----------
  [InstCombine] Allow KnownBits to be propagated

Bug #63699 shows a hang on arm in instcombine because we do not
propagate known bits for fshl/fshr rotates. We perform the propagation
and add regression test.

Differential Revision: https://reviews.llvm.org/D155307