[graphite] Fix for pr38492 and pr38498

Jan Sjodin jan_sjodin@yahoo.com
Wed Jan 7 00:00:00 GMT 2009

This patch fixes pr38492, which was caused by scalar phi nodes from conditionals. pr38498 was caused by non linear expressions (division) in the number of iterations of a loop. This was not detected early enough to discard the scop and the expression for the number of iterations was ignored later on. 

Okay for trunk and graphite branch if bootstrap passes?

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