https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114307
--- Comment #5 from Maxim Kuvyrkov <mkuvyrkov at gcc dot gnu.org> --- Thanks to Christophe L. for explaining the logic behind "is-effective-target arm_neon_ok". The issue is that "/* { dg-options "-O3" } */" in pr113576.c overrides DEFAULT_VECTFLAGS set by check_vect_support_and_set_flags, which contains "-mfpu=neon" -- as added by "is-effective-target arm_neon_ok". It so happens that pr113576.c is the only test that both uses "dg-options" and "tree-vect.h", thus the new error.