[Bug tree-optimization/10520] induction variable analysis not used to eliminate comparisons

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=10520

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
First of all number-of-iteration analysis would need to figure out that
the vars don't overflow ... (thus that the loop terminates).  It cannot
even compute the number of iterations symbolically.