[PATCH] D152832: [AMDGPU] Fix register class for a subreg in GCNRewritePartialRegUses.

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


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Comment at: llvm/lib/Target/AMDGPU/GCNRewritePartialRegUses.cpp:241
       SubRegRC = TRI->getSubRegisterClass(RC, OldSubReg);
 
     if (!SubRegRC)
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If you do TRI->getMatchingSuperRegClass(RC, TRI->getSubRegisterClass(RC, OldSubReg), OldSubReg) does it work?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D152832/new/

https://reviews.llvm.org/D152832