This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug tree-optimization/54735] [4.8 Regression] Segmentation fault in walk_aliased_vdefs_1
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 02 Oct 2012 10:37:08 +0000
- Subject: [Bug tree-optimization/54735] [4.8 Regression] Segmentation fault in walk_aliased_vdefs_1
- Auto-submitted: auto-generated
- References: <bug-54735-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54735
--- Comment #8 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-10-02 10:37:08 UTC ---
It seems that SSA form is not up-to-date:
> ./cc1plus -quiet t.ii -O2
t.ii: In function 'void check_() [with NT = M; int s = 3]':
t.ii:163:16: error: no immediate_use list
check_()
^
for SSA_NAME: .MEM_62 in statement:
# VUSE <.MEM_62>
__assert_fail (0);
t.ii:163:16: internal compiler error: verify_ssa failed
which is after PRE. So it might be the reduced testcase is not
triggering the same bug as the original one.
Tackling the PRE bug now (thus, -fno-tree-pre fixes it).