[all-commits] [llvm/llvm-project] 8505a8: [TableGen] CodeGenInstAlias: reduce calls to isSub...

[Alexander Richardson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8505a879e57f7fa978576b25b6d0d1b8304009eb
      https://github.com/llvm/llvm-project/commit/8505a879e57f7fa978576b25b6d0d1b8304009eb
  Author: Alexander Richardson <alexrichardson at google.com>
  Date:   2025-12-05 (Fri, 05 Dec 2025)

  Changed paths:
    M llvm/utils/TableGen/Common/CodeGenInstAlias.cpp
    M llvm/utils/TableGen/Common/CodeGenTarget.cpp
    M llvm/utils/TableGen/Common/CodeGenTarget.h

  Log Message:
  -----------
  [TableGen] CodeGenInstAlias: reduce calls to isSubClassOf. NFCI

Add a `getAsRegClassLike()` helper to CodeGenTarget that handles the
`isSubClassOf` calls internally. This slightly reduces duplicated code
since it can be shared with `getInitValueAsRegClassLike()`.
Also change the llvm_unreachable at the end of this function to an
actual error since it could be reachable with bad inputs.

Reviewed By: s-barannikov, arsenm

Pull Request: https://github.com/llvm/llvm-project/pull/170767



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