[Bug tree-optimization/68026] [6 Regression] Regression in GCC-6.0.0's optimizer

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68026

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 21 07:56:54 2015
New Revision: 229117

URL: https://gcc.gnu.org/viewcvs?rev=229117&root=gcc&view=rev
Log:
2015-10-21  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/68026
        * tree-ssa-ccp.c (get_value_for_expr): Zero-extend mask for
        unsigned VARYING values.

        * gcc.dg/tree-ssa/ssa-ccp-39.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-39.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-ccp.c