[PATCH] D95432: AMDGPU/GlobalISel: Combine uniform icmp

[Petar Avramovic via Phabricator via llvm-commits]

Petar.Avramovic updated this revision to Diff 322084.
Petar.Avramovic edited the summary of this revision.
Petar.Avramovic added a comment.

Use zext_trunc_fold from generic combiner to separately fold all cases of zext(trunc x) -> x made by regbankselect.
icmp move before select/brcond has to be aware of current state of MF since we run combines top-down and instructions (trunc) can be left without uses (zext was deleted by zext_trunc_fold)


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D95432/new/

https://reviews.llvm.org/D95432

Files:
  llvm/lib/Target/AMDGPU/AMDGPUCombine.td
  llvm/lib/Target/AMDGPU/AMDGPURegBankCombiner.cpp
  llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/combine-move-uniform-icmp.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/divergent-control-flow.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.end.cf.i32.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.end.cf.i64.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.is.private.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.is.shared.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.set.inactive.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/move-uniform-icmp.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/non-entry-alloca.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/saddsat.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/ssubsat.ll

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