https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118891
--- Comment #18 from marcus at mc dot pp.se --- vect-iv-7.c is probably a good (small) test case to start looking at. The source code is scalar, but gets auto-vectorized by gcc 14 at -O2. On big endian, the result arr[] becomes 10 8 14 12 18 16 22 20 26 24 30 28 34 32 38 36 but should be 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 so obviously endianness is not handled correctly here. There is no guarantee that this is the issue hitting the attribute handler, but since it's auto-vectorisation it could hit more or less any code. (There is no point in bisecting here; gcc 13 simply does not do the auto-vectorization.)
