------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-01
07:38 -------
(In reply to comment #2)
> Confirmed, reduced testcase:
> void flexto(int *current,int instance_count)
> {
> int *end, temp, j;
> for ( j=0; j<instance_count; ++j )
> end = &temp;
> *current = *end;
> }
Just a note, this is broken before the loop optimizations are run and it looks
like it was caused by (my
patch):
2004-11-30 Andrew Pinski <[EMAIL PROTECTED]>
PR tree-opt/18298
* tree-optimize.c (init_tree_optimization_passes): Add a may_alias
pass right after fold builtins.
But It just exposes a latent bug in may_alias as we don't keep temp marked as a
non gimple register
even though the variable has its address taken still (yes adding a dce pass
right before may_alias will
work around the problem but that does not fix the other problem, we should be
able to call may_alias
even without calling dce).
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |dnovillo at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19217
