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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/57343] [4.8 Regression] wrong code on x86_64-linux at -Os and above
Date: Mon, 27 May 2013 13:03:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57343

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |4.9.0
   Target Milestone|4.8.1                       |4.8.2
            Summary|[4.8/4.9 Regression] wrong  |[4.8 Regression] wrong code
                   |code on x86_64-linux at -Os |on x86_64-linux at -Os and
                   |and above                   |above
      Known to fail|                            |4.8.1

--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon May 27 13:02:24 2013
New Revision: 199357

URL: http://gcc.gnu.org/viewcvs?rev=199357&root=gcc&view=rev
Log:
2013-05-27  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/57343
    * tree-ssa-loop-niter.c (number_of_iterations_ne_max): Do not
    use multiple_of_p if not TYPE_OVERFLOW_UNDEFINED.
    (number_of_iterations_cond): Do not build the folded tree.

    * gcc.dg/torture/pr57343.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr57343.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-niter.c