This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug tree-optimization/56448] [4.8 Regression] cc1 hangs on volatile array with -O or above
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 25 Feb 2013 22:17:01 +0000
- Subject: [Bug tree-optimization/56448] [4.8 Regression] cc1 hangs on volatile array with -O or above
- Auto-submitted: auto-generated
- References: <bug-56448-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56448
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2013-02-25
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |4.8.0
Summary|cc1 hangs on volatile array |[4.8 Regression] cc1 hangs
|with -O or above |on volatile array with -O
| |or above
Ever Confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-02-25 22:17:01 UTC ---
Started with my http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195136 fix.
I think the problem is that for:
tree val; // which is &a[0] where a is volatile array
operand_equal_p (val, unshare_expr (val), OEP_PURE_SAME)
is false.