[Bug tree-optimization/27285] [4.1 regression] ivopts postgresql miscompilation

["jakub at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #6 from jakub at gcc dot gnu dot org  2006-05-04 06:40 -------
Subject: Bug 27285

Author: jakub
Date: Thu May  4 06:40:15 2006
New Revision: 113515

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=113515
Log:
        PR tree-optimization/27285

        Backport from mainline:

        2006-03-28  Zdenek Dvorak  <dvorakz@suse.cz>

        PR tree-optimization/25985
        * tree-ssa-loop-niter.c (number_of_iterations_le,
        number_of_iterations_ne): Make comments more precise.
        (number_of_iterations_cond): Add only_exit argument.  Use the
        fact that signed variables do not overflow only when only_exit
        is true.
        (loop_only_exit_p): New.
        (number_of_iterations_exit): Pass result of loop_only_exit_p to
        number_of_iterations_cond.

        * gcc.c-torture/execute/pr27285.c: New test.

Added:
    branches/gcc-4_1-branch/gcc/testsuite/gcc.c-torture/execute/pr27285.c
Modified:
    branches/gcc-4_1-branch/gcc/ChangeLog
    branches/gcc-4_1-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_1-branch/gcc/tree-ssa-loop-niter.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27285