gcd/lcm test from internal repo with questionable bits extracted

[CaseyCarter]

Partially addresses VSO-936680

[StephanTLavavej]

I'm mirroring this to the MSVC-internal repo - please notify me if any further changes are pushed.

[barcharcraz]

do we prefer the test.compile.pass.cpp format over just test.cpp now?

[CaseyCarter]

do we prefer the test.compile.pass.cpp format over just test.cpp now?

Yes we do. The GitHub test runner recognizes the suffix .compile.pass.cpp and it won't attempt to link and run such test cases.

[StephanTLavavej]

One note about test.compile.pass.cpp - such tests must still be prepared to be linked and ran with no effect, since the internal test harness doesn't know to skip those steps. (It could presumably be enlightened, but teaching that ancient Perl machinery anything is quite difficult.)

[StephanTLavavej]

Thanks for being the Greatest Casey Denominator! 😹 🔼 🎉