https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96966
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Even
extern char a[32];
void f (const void *s)
{
char *p = (char*)__builtin_memcpy (a, s, 16);
__builtin_memcpy (p, s, 16);
}
void g (const void *s)
{
__builtin_memcpy (a, s, 16);
__builtin_memcpy (a, s, 16);
}
used to be optimized just in 8.1/8.2 and not in earlier or later GCC versions.
Perhaps delaying the lowering of memcpy a tiny bit and trying to optimize it
when it is still not lowered?
