https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92152
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> ---
Indeed, following testcase aborts on x86_64-linux with -O2/-O3/-Os and succeeds
with -O0/-O1/-Og:
union U
{
long long i;
long f;
} v;
long
foo (long *f)
{
*f = 1;
v.i = 0;
v.f = 0;
return *f;
}
int
main ()
{
if (foo (&v.f) != 0)
__builtin_abort ();
return 0;
}
Started with r271813.
