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[Bug tree-optimization/32663] [4.3 regression]: revision 126369 went into an infinite loop
- From: "hjl at lucon dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 7 Jul 2007 20:08:11 -0000
- Subject: [Bug tree-optimization/32663] [4.3 regression]: revision 126369 went into an infinite loop
- References: <bug-32663-682@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #8 from hjl at lucon dot org 2007-07-07 20:08 -------
I am testing this patch:
--- gcc/tree-ssa-pre.c.bad 2007-07-07 08:18:31.000000000 -0700
+++ gcc/tree-ssa-pre.c 2007-07-07 12:48:47.000000000 -0700
@@ -3362,7 +3362,8 @@ make_values_for_stmt (tree stmt, basic_b
else
{
tree val = vn_lookup_or_add_with_stmt (newt, stmt);
- vn_add (lhs, val);
+ if (!lhsval || !VALUE_HANDLE_VUSES (lhsval))
+ vn_add (lhs, val);
}
add_to_exp_gen (block, newt);
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32663