https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82853
--- Comment #27 from Richard Earnshaw <rearnsha at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #26) > A test generator for x % c1 == c2 expansion for unsigned, int, unsigned long > long, long long, unsigned int128 and int128 types (assuming ilp32 or lp64) > plus tests for those types. Takes about 2 minutes to compile + run on a fast > box and uses random (), so not really sure the tests should go into the > testsuite. Thoughts on that? After all, the generator isn't extra smart and > doesn't try to find problematic corner cases. If you work on the 'guess' of a 10x slowdown when using simulators, that's probably too long particularly if it's not delivering high value. Ultimately, it will depend on how much of that 2 minutes is during generate/compile and how much during run time.