[Bug c++/93093] __builtin_source_location reports values for default arguments not aligned with the Standard

[phdofthehouse at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93093

--- Comment #4 from JeanHeyd Meneide <phdofthehouse at gmail dot com> ---
I changed the library test cases, but maybe there needs to be something that
helps the library developers tag a constant evaluation function as something
that should be ran later / deferred. I don't have any good ideas, just
spitballing.

Either way, the new patch passes by not testing for some of the cases similar
to what's in the Standard passage in [support.srcloc]:
https://gcc.gnu.org/ml/gcc-patches/2020-01/msg00036.html