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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 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.
>
> You do if alias information has gone stale due to transformations.
> The SSA form is another example. You can have the program in SSA
> form, but a transformation has inserted new code that also needs to be
> placed in SSA form.
>
> It could be arranged by clearing PROP_ssa on exit.
>
That is exactly what I had in mind. If you invalidate a property then
the property is destroyed and whoever asks for it must invoke the
relevant function to enable it again. Is that a problem?
Cheers,
Manuel.