> 2004-03-18  Eric Botcazou <ebotcazou@libertysurf.fr>
>             Mark Mitchell <mark@codesourcery.com>
>
> 	PR optimization/13424
> 	* expr.c (store_constructor): Emit a blockage after clearing the
> 	aggregate because of an incomplete or mostly zero constructor.

Well, this pessimizes way too much.  We can emit the blockage only in the 
unsafe cases:


 2004-03-18  Eric Botcazou <ebotcazou@libertysurf.fr>
             Mark Mitchell <mark@codesourcery.com>

 	PR optimization/13424
 	* expr.c (store_constructor): Emit a blockage after clearing the
 	aggregate because of an incomplete or mostly zero constructor if
	the aggregate contains read-only fields.


But this would still pessimize a lot, because life analysis would not be able 
to delete the redundant writes anymore.

-- 
Eric Botcazou