On Wed, Jul 15, 2009 at 10:46 PM, Richard Guenther<richard.guent...@gmail.com> wrote: > On Wed, Jul 15, 2009 at 9:15 PM, Tobias > Grosser<gros...@fim.uni-passau.de> wrote: >>> A note on Lis final graph algorithm. I don't understand why you want >>> to allow data-references to be part of multiple alias-sets? (Of course >>> I don't know how you are going to use the alias-sets ...) >> >> Just to pass more information to Graphite. The easiest example might be >> something like >> >> A -- B -- C >> >> if we have >> >> AS1 = {A,B} >> AS2 = {B,C} >> >> we know that A and C do not alias and therefore do not have any > > No, from the above you _don't_ know that. How would you arrive > at that conclusion?
What I want to say is that, if A -- B -- C is supposed to be the alias graph resulting from querying the alias oracle for the pairs (A, B), (A, C), (B, C) then this is a result that will never occur. Because if (A, B) is true and (B, C) is true then (A, C) will be true as well. Richard. >> dependencies. If we put A,B,C in one big set we can not say this. > > But that is what would be correct. (?) > > Richard. >