[llvm] [FileCheck] Limit quadratic partial-match search behavior (PR #147833)

[Jon Roelofs via llvm-commits]

jroelofs wrote:

> You should use %ProtectFileCheckOutput on the first FileCheck invocation I believe, similar to what is done in llvm/test/FileCheck/bad-char.txt for instance.

17e32c921acc856498ad13ade495374bed4605b2


https://github.com/llvm/llvm-project/pull/147833