https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121372
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> --- We certainly need preprocessed source + full gcc command line used to compile it for the TU that is miscompiled. Ideally, if it is really dgemv_n.c and so doesn't really call other function also make it __attribute__((noipa)) and add main that sets up the arrays etc. with values on which it reproduces. Does -fno-ipa-modref help?