[PATCH] D74182: AMDGPU/GlobalISel: Fix mapping G_ICMP with constrained result

[Matt Arsenault via Phabricator via llvm-commits]

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

When SI_IF is inserted, it constrains the source register with a
register class, which was quite likely a G_ICMP. This was incorrectly
treating it as a scalar, and then applyMappingImpl would end up
producing invalid MIR since this was unexpected.

      

Also fix not using all VGPR sources for vcc outputs.


https://reviews.llvm.org/D74182

Files:
  llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/divergent-control-flow.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-amdgcn.div.fmas.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-and-s1.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-icmp.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-icmp.s16.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-or.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-phi-s1.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-phi.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-xor.mir

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