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Re: [RFC] failures found while pounding on GCC trunk
On 24/09/2007, Diego Novillo <dnovillo@google.com> wrote:
> On 9/24/07, Manuel López-Ibáñez <lopezibanez@gmail.com> wrote:
>
> > I don't understand is why PROPerties are not associated with TODO_
> > functions in a way that if a pass don't have the properties it
> > requires, it can call the appropriate TODO_ function. That way, if
> > some pass needs PROP_alias but none has triggered TODO_rebuild_alias,
> > then that pass calls TODO_rebuild_alias by itself. That way, if no
> > pass requires alias information, then no pass ever calls
> > TODO_rebuild_alias.
>
> That was one of the original design intentions. But it was never
> actually implemented this way. I think it would be possible to
> implement it this way but then we would have to distinguish whether a
> certain property needs to be refreshed or not.
>
> For instance, if you ask PROP_alias and aliases have been computed
> already, you'd have to check that we don't need to compute aliases
> again. That may add a few wrinkles to the process.
>
I don't get it. If you ask for PROP_alias and aliases have been
computed, then PROP_alias is enabled and you don't need to compute
them again.
Cheers,
Manuel.