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Re: Semi-Latent Bug in tree vectorizer


> >  Also, after ivopts, the whole CFG needs to be
> > re-scanned because the new alias relations it creates affect
> > statements that have not even been modified by the process.
> Wow.  Egad.
> 

Yes, this would be very ungood if it is the case.
If it is really changing the *semantics* of the program, or has a
side-effect of causing already existing variables now have *larger*
alias sets, that would be very bad (because it would mean we couldn't
use the results of interprocedural alias analysis without trying to
figure out what has now been invalidated).

> Jeff
> 


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