https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83321
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #1) > Any idea on which source file it is (or at least a small set of them)? > What your -march=native is? It happens almost an any source file, for example most libgcc files already hit the issue. I was testing on gcc67, so march=znver1.