[Bug middle-end/53073] [4.8 Regression] 464.h264ref in SPEC CPU 2006 miscompiled

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53073

--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> 2013-01-31 09:01:02 UTC ---
Author: rguenth
Date: Thu Jan 31 09:00:54 2013
New Revision: 195610

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195610
Log:
2013-01-31  Richard Biener  <rguenther@suse.de>

    PR middle-end/53073
    * common.opt (faggressive-loop-optimizations): New flag,
    enabled by default.
    * doc/invoke.texi (faggressive-loop-optimizations): Document.
    * tree-ssa-loop-niter.c (estimate_numbers_of_iterations_loop): Guard
    infer_loop_bounds_from_undefined by it.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/common.opt
    trunk/gcc/doc/invoke.texi
    trunk/gcc/tree-ssa-loop-niter.c