[Bug middle-end/40979] induct benchmark 60% slower when compiled with -fgraphite-identity

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40979

--- Comment #19 from Dominique d'Humieres <dominiq at lps dot ens.fr> 
2011-02-01 17:40:17 UTC ---
> That made the loop vectorizable.

Confirmed on top of the patch in comment #14.