[all-commits] [llvm/llvm-project] 674226: [AMDGPU] Apply pre-emit s_cbranch_vcc optimation t...

[Carl Ritson via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 674226126da6f08d97d383fca3b0c0e8c758d053
      https://github.com/llvm/llvm-project/commit/674226126da6f08d97d383fca3b0c0e8c758d053
  Author: Carl Ritson <carl.ritson at amd.com>
  Date:   2020-07-15 (Wed, 15 Jul 2020)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIPreEmitPeephole.cpp
    M llvm/test/CodeGen/AMDGPU/branch-relaxation.ll
    M llvm/test/CodeGen/AMDGPU/indirect-addressing-si.ll
    M llvm/test/CodeGen/AMDGPU/infinite-loop.ll
    M llvm/test/CodeGen/AMDGPU/insert-skip-from-vcc.mir
    M llvm/test/CodeGen/AMDGPU/insert_vector_elt.ll
    M llvm/test/CodeGen/AMDGPU/multi-divergent-exit-region.ll
    M llvm/test/CodeGen/AMDGPU/sgpr-control-flow.ll
    M llvm/test/CodeGen/AMDGPU/wave32.ll
    M llvm/test/CodeGen/AMDGPU/wqm.ll

  Log Message:
  -----------
  [AMDGPU] Apply pre-emit s_cbranch_vcc optimation to more patterns

Add handling of s_andn2 and mask of 0.
This eliminates redundant instructions from uniform control flow.

Reviewed By: rampitec

Differential Revision: https://reviews.llvm.org/D83641