[PATCH] D78591: [AMDGPU] Define special SGPR subregs

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec created this revision.
rampitec added a reviewer: arsenm.
Herald added subscribers: kerbowa, hiraditya, t-tye, tpr, dstuttard, yaxunl, nhaehnle, wdng, jvesely, kzhuravl.

These are used in SReg_32 and when we start to use SGPR_LO16
there will be compaints that not all registers in RC support
all subreg indexes. For now it is NFC.

Unused regunits are reserved so that verifier does not complain
about missing phys reg live-ins.


https://reviews.llvm.org/D78591

Files:
  llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
  llvm/lib/Target/AMDGPU/SIRegisterInfo.td
  llvm/test/CodeGen/AMDGPU/ipra-regmask.ll

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