https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98737
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> ---
That peephole handles only constants, i.e.
_Bool h(void)
{
return __sync_fetch_and_add(&a, -32) == 32;
}
_Bool i(void)
{
return __sync_fetch_and_add(&a, 64) == -64;
}
Anyway, for #c0 the peephole2 would need to match because it is op_fetch rather
than fetch_op the UNSPEC_XCHG followed by the operation again followed by
comparison.
