------- Comment #5 from rguenth at gcc dot gnu dot org 2007-12-07 23:47 -------
We don't warn with -Wstrict-aliasing=3 first because we prune the points-to
sets based on TBAA which makes o.11_19 in
o.11_19 = (const struct const_iterator *) &D.2360;
# VUSE <D.2360_76>
D.2362_20 = o.11_19->i;
point to anything. If you "fix" that with
Index: tree-ssa-structalias.c
===================================================================
--- tree-ssa-structalias.c (revision 130692)
+++ tree-ssa-structalias.c (working copy)
@@ -5014,7 +5014,7 @@ find_what_p_points_to (tree p)
set_uids_in_ptset (p, finished_solution, vi->solution,
vi->directly_dereferenced,
- vi->no_tbaa_pruning);
+ true);/*vi->no_tbaa_pruning);*/
result = shared_bitmap_lookup (finished_solution);
if (!result)
we don't warn either, possibly because the machinery in
tree-ssa-alias-warnings.c does not handle pointers to locals(?)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34385
