https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69715
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> --- struct __attribute__((may_alias)) S { long long low; int high; }; struct S foo (void); long double bar (void) { long double a; *(struct S *)&a = foo (); return a; } C (and more simplified) testcase.