[Bug tree-optimization/34099] [4.3 Regression] optimizer problem

[rguenth at gcc dot gnu dot org]

------- Comment #14 from rguenth at gcc dot gnu dot org  2007-11-16 10:10 -------
Subject: Bug 34099

Author: rguenth
Date: Fri Nov 16 10:10:05 2007
New Revision: 130222

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=130222
Log:
2007-11-16  Richard Guenther  <rguenther@suse.de>

        PR tree-optimization/34099
        * tree-ssa-ccp.c (likely_value): Use a whitelist for operators
        that produce UNDEFINED result if at least one of its operands
        is UNDEFINED.  By default the result is only UNDEFINED if all
        operands are UNDEFINED.

        * g++.dg/torture/pr3499.C: New testcase.
        * gcc.c-torture/execute/pr34099.c: Likewise.

Added:
    trunk/gcc/testsuite/g++.dg/torture/pr34099.C
    trunk/gcc/testsuite/gcc.c-torture/execute/pr34099.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-ccp.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34099