[clang] [llvm] [SystemZ] Add support for __builtin_setjmp and __builtin_longjmp (PR #116642)

[Ulrich Weigand via cfe-commits]

https://github.com/uweigand commented:

One last comment, then it looks good to go for me.  Thanks!

https://github.com/llvm/llvm-project/pull/116642