[llvm] [lit] Support wildcard in --xfail-not option (PR #151191)

[Joel E. Denny via llvm-commits]

jdenny-ornl wrote:

> Since we're just interested in profile consistency on the upcoming bot, ignoring `FileCheck` is simpler and sufficient. However, this has the effect of passing XFAIL tests. Rather than listing them all, the alternative is to just ignore passing XFAIL.

So there are no XFAIL tests that are failing because of a non-zero exit status of a command (e.g., opt, diff, grep)?  That is, simply avoiding FileCheck invocations is enough to make all XFAIL tests start to pass?  If not, then `--xfail-not=*` will expose those test failures.

https://github.com/llvm/llvm-project/pull/151191