[all-commits] [llvm/llvm-project] fee415: AMDGPU/GlobalISel: Introduce post-legalize combiner

[Matt Arsenault via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: fee41517fe0f7ff9f0e204dd9200ebf32ca03cb8
      https://github.com/llvm/llvm-project/commit/fee41517fe0f7ff9f0e204dd9200ebf32ca03cb8
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2020-02-24 (Mon, 24 Feb 2020)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPU.h
    M llvm/lib/Target/AMDGPU/AMDGPUCombine.td
    A llvm/lib/Target/AMDGPU/AMDGPUPostLegalizerCombiner.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUPreLegalizerCombiner.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
    M llvm/lib/Target/AMDGPU/CMakeLists.txt
    M llvm/test/CodeGen/AMDGPU/GlobalISel/combine-ashr-narrow.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/combine-lshr-narrow.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/combine-shl-narrow.mir
    M llvm/test/CodeGen/AMDGPU/GlobalISel/fmax_legacy.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/fmin_legacy.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.kernarg.segment.ptr.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/udiv.i32.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/urem.i32.ll

  Log Message:
  -----------
  AMDGPU/GlobalISel: Introduce post-legalize combiner

The current set of custom combines are only really useful after
legalization, so move them there. There is a lot of overlap in the
boilerplate here, but I think we do want a pretty different set of
combines before and after legalize. I think we will want a lot of
overlap between the post-legalize and a post-regbankselect combiner.