2013-02-05 Richard Biener <rguenther@suse.de>
Backport from mainline
2012-12-10 Richard Biener <rguenther@suse.de>
PR tree-optimization/55107
* tree-ssa-pre.c (struct pre_stats): Remove constified field.
(bitmap_set_replace_value): Add gcc_unreachable.
(do_regular_insertion): Re-write all_same handling. Insert
an assignment instead of a PHI in this case.
(execute_pre): Do not record constified events.
* gcc.dg/torture/pr55107.c: New testcase.
* gcc.dg/tree-ssa/ssa-pre-5.c: Adjust.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_7-branch@195755
138bc75d-0d04-0410-961f-
82ee72b054a4