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Re: [RFC] failures found while pounding on GCC trunk
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.
Cheers,
Manuel.