[PATCH] D64589: [UpdateTestChecks] Emit warning when invalid value for -check-prefix option

[Dávid Bolvanský via Phabricator via llvm-commits]

xbolva00 added a comment.

@gbedwell Thanks for ideas!

I decided to take the regex [0] which FileCheck uses to check prefixes and apply it here.

[0] https://github.com/llvm/llvm-project/blob/2a7f5204602938ae89b0860e9412603d1951d945/llvm/lib/Support/FileCheck.cpp


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D64589/new/

https://reviews.llvm.org/D64589