[Bug tree-optimization/39201] [meta-bug] ivopts metabug

[ubizjak at gmail dot com]

------- 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.


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ubizjak at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  BugsThisDependsOn|                            |34163


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39201