[PATCH] D74728: AMDGPU/GlobalISel: Introduce post-legalize combiner

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: nhaehnle, kerbowa, foad, cdevadas, hsmhsm.
Herald added subscribers: hiraditya, t-tye, tpr, dstuttard, rovka, yaxunl, mgorny, wdng, jvesely, kzhuravl.
Herald added a project: LLVM.

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.


https://reviews.llvm.org/D74728

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

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