[Bug tree-optimization/29751] not optimizing access a[0] , a[1]

[pinskia at gcc dot gnu dot org]

------- Comment #7 from pinskia at gcc dot gnu dot org  2009-08-05 17:52 -------
Created an attachment (id=18307)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18307&action=view)
Patch which I am testing

This patch fixes the problem including a+1 and a+2 not aliasing each other.
It adds two testcases and removes a xfail on one.
It also fixes a bug in cfgexpand.c (update_alias_info_with_stack_vars) so that
it does not create SSA_NAMES with a define statement of NULL.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29751