[PATCH] D141137: [ARM] Fold And/Or into CSel if possible

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: samtebbs, bipmis, SjoerdMeijer, labrinea.
Herald added subscribers: zzheng, hiraditya, kristof.beyls.
Herald added a project: All.
dmgreen requested review of this revision.
Herald added a project: LLVM.

This is the ARM equivalent of D141119 <https://reviews.llvm.org/D141119>, where we fold `and x, (csel 0, 1, cc)` to `csel ZR, x, cc` if we know that x is 0/1 and for `or x, (csel 0, 1, cc)` emit `csinc x, ZR, cc`. The or pattern gets recognized from a cmov under Arm.


https://reviews.llvm.org/D141137

Files:
  llvm/lib/Target/ARM/ARMInstrInfo.td
  llvm/lib/Target/ARM/ARMInstrThumb2.td
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/fast-fp-loops.ll
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/mve-float-loops.ll
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/mve-tail-data-types.ll
  llvm/test/CodeGen/Thumb2/csel-andor-onebit.ll
  llvm/test/CodeGen/Thumb2/mve-nounrolledremainder.ll
  llvm/test/CodeGen/Thumb2/mve-pred-and.ll
  llvm/test/CodeGen/Thumb2/mve-pred-or.ll
  llvm/test/CodeGen/Thumb2/mve-vcmp.ll
  llvm/test/CodeGen/Thumb2/mve-vcmpf.ll
  llvm/test/CodeGen/Thumb2/mve-vcmpfr.ll
  llvm/test/CodeGen/Thumb2/mve-vcmpfz.ll
  llvm/test/CodeGen/Thumb2/mve-vcmpr.ll

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