------- Comment #2 from ubizjak at gmail dot com 2009-02-16 09:44 -------
I'm adding PR 34163 in the hope that ivopts pass will someday know how to
handle x[n] = f (x[n-1]) from "... very tight loops that calculate x[n] from
the value x[n-1], where x[n-1] is the result of a previous step."
This is especially important for unrolled loops, see PR 34163, comment #8.
--
ubizjak at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |34163
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39201
