[Bug tree-optimization/40087] [4.3/4.4/4.5 Regression] Number of iterations analysis wrong

[rakdver at gcc dot gnu dot org]

------- Comment #9 from rakdver at gcc dot gnu dot org  2009-05-20 00:34 -------
Subject: Bug 40087

Author: rakdver
Date: Wed May 20 00:33:54 2009
New Revision: 147727

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=147727
Log:
        PR tree-optimization/40087
        * tree-ssa-loop-niter.c (number_of_iterations_ne_max,
        number_of_iterations_ne): Rename never_infinite argument.
        (number_of_iterations_lt_to_ne, number_of_iterations_lt,
        number_of_iterations_le): Handle pointer-type ivs when
        exit_must_be_taken is false.
        (number_of_iterations_cond):  Do not always assume that
        exit_must_be_taken if the control variable is a pointer.

        * gcc.dg/tree-ssa/pr40087.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr40087.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-niter.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40087