[all-commits] [llvm/llvm-project] fd64a8: [AMDGPU] Combine s_or_saveexec, s_xor instructions.

[tsymalla-AMD via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fd64a857ee7b68870e7304a56c480fad7e5b051f
      https://github.com/llvm/llvm-project/commit/fd64a857ee7b68870e7304a56c480fad7e5b051f
  Author: Thomas Symalla <thomas.symalla at amd.com>
  Date:   2022-07-21 (Thu, 21 Jul 2022)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIOptimizeExecMasking.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.memmove.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/localizer.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
    M llvm/test/CodeGen/AMDGPU/branch-relaxation.ll
    M llvm/test/CodeGen/AMDGPU/bypass-div.ll
    M llvm/test/CodeGen/AMDGPU/collapse-endcf.ll
    M llvm/test/CodeGen/AMDGPU/else.ll
    M llvm/test/CodeGen/AMDGPU/kill-infinite-loop.ll
    M llvm/test/CodeGen/AMDGPU/llvm.amdgcn.softwqm.ll
    M llvm/test/CodeGen/AMDGPU/multi-divergent-exit-region.ll
    A llvm/test/CodeGen/AMDGPU/s_or_saveexec_xor_combine.mir
    M llvm/test/CodeGen/AMDGPU/set-inactive-wwm-overwrite.ll
    M llvm/test/CodeGen/AMDGPU/sgpr-control-flow.ll
    M llvm/test/CodeGen/AMDGPU/transform-block-with-return-to-epilog.ll
    M llvm/test/CodeGen/AMDGPU/valu-i1.ll
    M llvm/test/CodeGen/AMDGPU/vcmp-saveexec-to-vcmpx.ll
    M llvm/test/CodeGen/AMDGPU/vgpr-liverange.ll
    M llvm/test/CodeGen/AMDGPU/wqm.ll

  Log Message:
  -----------
  [AMDGPU] Combine s_or_saveexec, s_xor instructions.

This patch merges a consecutive sequence of

s_or_saveexec s_o, s_i
s_xor exec, exec, s_o

into a single

s_andn2_saveexec s_o, s_i instruction.
This patch also cleans up the SIOptimizeExecMasking pass a bit.

Reviewed By: nhaehnle

Differential Revision: https://reviews.llvm.org/D129073