[all-commits] [llvm/llvm-project] 8693dd: Revert "[GlobalISel] Fold xor(cmp(pred, _, _), 1) ...

[Jordan Rupprecht via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 8693ddc74371dedc742c9f3d3e4eda1da72c13ea
      https://github.com/llvm/llvm-project/commit/8693ddc74371dedc742c9f3d3e4eda1da72c13ea
  Author: Jordan Rupprecht <rupprecht at google.com>
  Date:   2020-09-01 (Tue, 01 Sep 2020)

  Changed paths:
    M llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
    M llvm/include/llvm/CodeGen/GlobalISel/MIPatternMatch.h
    M llvm/include/llvm/CodeGen/GlobalISel/Utils.h
    M llvm/include/llvm/Target/GlobalISel/Combine.td
    M llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
    M llvm/lib/CodeGen/GlobalISel/Utils.cpp
    M llvm/lib/Target/AArch64/GISel/AArch64InstructionSelector.cpp
    R llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-invert-cmp.mir
    R llvm/test/CodeGen/AArch64/GlobalISel/select-brcond-of-not.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/divergent-control-flow.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/sdiv.i64.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/srem.i64.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/udiv.i64.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/urem.i64.ll

  Log Message:
  -----------
  Revert "[GlobalISel] Fold xor(cmp(pred, _, _), 1) -> cmp(inverse(pred), _, _)" (and dependent patch "Optimize away a Not feeding a brcond by using tbz instead of tbnz.")

This reverts commit 8ad8f484b63ca507417b58c9016d2761f2b1a1a8. It causes crashes when running `ninja check-llvm-codegen-aarch64-globalisel`, e.g.
http://lab.llvm.org:8011/builders/clang-with-thin-lto-ubuntu/builds/24132/steps/test-stage1-compiler/logs/stdio.
Note that the crash does not seem to reproduce in debug builds.

5ded4442520d3dbb1aa72e6fe03cddef8828c618 depends on this, so revert that too.