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Re: [RFC] failures found while pounding on GCC trunk
On 9/23/07, Manuel López-Ibáñez <lopezibanez@gmail.com> wrote:
> On 23/09/2007, Richard Guenther <richard.guenther@gmail.com> wrote:
> > On 23 Sep 2007 09:54:29 -0700, Ian Lance Taylor <iant@google.com> wrote:
> > >
> > > Well, if the -fno-tree-salias flag now causes wrong-code bugs then I
> > > certainly agree that it should be eliminated.
> >
> > I didn't say that ;) But I certainly expect salias to expose/hide bugs
> > there because MPT grouping will be changed. At the moment
> > -fno-tree-salias simply ICEs.
> >
>
> As I understand it, -fno-tree-salias ICEs because a pass after salias
> needs alias information PROP_alias but no pass has executed
> TODO_rebuild_alias. We just need to build the alias information
> regardless of salias by adding a TODO_rebuild_alias to an earlier pass
> that is unconditionally executed (apply_inline?) or to a dummy pass
> dummy_todo_alias.
>
> Am I wrong? I have the same problem when I try to enable SSA at O0 and
> my current solution is the dummy pass.
Right, a dummy pass after salias works.
Richard.