[Bug tree-optimization/32663] [4.3 regression]: revision 126369 went into an infinite loop

["dberlin at dberlin dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #11 from dberlin at gcc dot gnu dot org  2007-07-08 20:40 -------
Subject: Re:  [4.3 regression]: revision 126369 went into an infinite loop

On 8 Jul 2007 15:12:51 -0000, hjl at lucon dot org
<gcc-bugzilla@gcc.gnu.org> wrote:
>
>
> ------- Comment #10 from hjl at lucon dot org  2007-07-08 15:12 -------
> When a statement has no vuses, but its LHS value handle has vuses, we wind
> up with
>
>               tree val = vn_lookup_or_add_with_stmt (newt, stmt);
>               vn_add (lhs, val);
>
> Now the LHS value handle changes from vuses to no vuses since the statement
> has no vuses. Are you sure you handle this case correctly?

>  Can we reuse
> LHS value handle in this case?
>

I'm going to fix the whole dman thing the righ tway, which is to
remove vuses from value handles and attach them to expressions.
>
> --
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32663
>
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32663