[PATCH] D120202: [AMDGPU] Extend pre-emit peephole to redundantly masked VCC

[Carl Ritson via Phabricator via llvm-commits]

critson created this revision.
critson added reviewers: foad, arsenm, rampitec.
Herald added subscribers: kerbowa, asbirlea, hiraditya, t-tye, tpr, dstuttard, yaxunl, nhaehnle, jvesely, kzhuravl.
critson requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

Extend pre-emit peephole for S_CBRANCH_VCC[N]Z to eliminate
redundant S_AND operations against EXEC for V_CMP results in VCC.
These occur after after register allocation when VCC has been
selected as the comparison destination.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D120202

Files:
  llvm/lib/Target/AMDGPU/SIPreEmitPeephole.cpp
  llvm/test/CodeGen/AMDGPU/agpr-copy-no-free-registers.ll
  llvm/test/CodeGen/AMDGPU/expand-scalar-carry-out-select-user.ll
  llvm/test/CodeGen/AMDGPU/global-load-saddr-to-vaddr.ll
  llvm/test/CodeGen/AMDGPU/idiv-licm.ll
  llvm/test/CodeGen/AMDGPU/multilevel-break.ll
  llvm/test/CodeGen/AMDGPU/nested-loop-conditions.ll
  llvm/test/CodeGen/AMDGPU/salu-to-valu.ll
  llvm/test/CodeGen/AMDGPU/sdiv64.ll
  llvm/test/CodeGen/AMDGPU/skip-if-dead.ll
  llvm/test/CodeGen/AMDGPU/srem64.ll
  llvm/test/CodeGen/AMDGPU/trap-abis.ll
  llvm/test/CodeGen/AMDGPU/udiv64.ll
  llvm/test/CodeGen/AMDGPU/uniform-cfg.ll
  llvm/test/CodeGen/AMDGPU/unstructured-cfg-def-use-issue.ll
  llvm/test/CodeGen/AMDGPU/urem64.ll
  llvm/test/CodeGen/AMDGPU/wave32.ll
  llvm/test/CodeGen/AMDGPU/wqm.ll

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