https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92765
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to Martin Sebor from comment #12) > The __builtin_strcmp(ptr->header.magic, "x") call in comment #0 is undefined > because the two-element array ptr->header.magic is not a nul-terminated > string. The warning was designed to point that out. I don't agree with that view, but if you replace that first __builtin_strcmp with say __builtin_memcmp(ptr->header.magic, "x", 2) == 0 it fails the same way. Plus all the other testcases in this PR. The first call really doesn't matter, all that matters is that there is something taking address of ptr->header.magic earlier in the function. And a warning designed on something the GIMPLE IL does not preserve is wrong.
