------- Comment #1 from pinskia at gcc dot gnu dot org 2006-12-21 22:23 -------
The problem is that we force the struct to be BLKmode from DImode with:
/* If structure's known alignment is less than what the scalar
mode would need, and it matters, then stick with BLKmode. */
if (TYPE_MODE (type) != BLKmode
&& STRICT_ALIGNMENT
&& ! (TYPE_ALIGN (type) >= BIGGEST_ALIGNMENT
|| TYPE_ALIGN (type) >= GET_MODE_ALIGNMENT (TYPE_MODE (type))))
{
/* If this is the only reason this type is BLKmode, then
don't force containing types to be BLKmode. */
TYPE_NO_FORCE_BLK (type) = 1;
TYPE_MODE (type) = BLKmode;
}
Which causes us to store this to the stack all the time.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30271
