[PATCH] D107441: [AMDGPU] Add G_AMDGPU_FFBL_B32

[Jay Foad via Phabricator via llvm-commits]

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

This is the counterpart to G_AMDGPU_FFBH_U32 which already exists. These
instructions have a defined result of -1 when the input is zero.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D107441

Files:
  llvm/lib/Target/AMDGPU/AMDGPUGISel.td
  llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp
  llvm/lib/Target/AMDGPU/SIInstructions.td
  llvm/test/CodeGen/AMDGPU/GlobalISel/inst-select-amdgpu-ffbl-b32.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-amdgpu-ffbl-b32.mir

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