[Bug tree-optimization/40579] [4.3/4.4/4.5 Regression] gcc -O2 optimization causes infinite loop and wrong output

[rguenth at gcc dot gnu dot org]

------- Comment #4 from rguenth at gcc dot gnu dot org  2009-06-29 11:57 -------
Subject: Bug 40579

Author: rguenth
Date: Mon Jun 29 11:57:15 2009
New Revision: 149046

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=149046
Log:
2009-06-29  Richard Guenther  <rguenther@suse.de>

        PR tree-optimization/40579
        * tree-vrp.c (vrp_evaluate_conditional): Bail out early if
        the IL to simplify has constants that overflowed.

        * gcc.c-torture/execute/pr40579.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr40579.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40579