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