[Bug tree-optimization/56250] Wrong constant folding on unsigned int

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56250

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-02-19 17:26:15 UTC ---
Author: jakub
Date: Tue Feb 19 17:26:04 2013
New Revision: 196147

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196147
Log:
    Backported from mainline
    2013-02-08  Jakub Jelinek  <jakub@redhat.com>

    PR tree-optimization/56250
    * fold-const.c (extract_muldiv_1) <case NEGATE_EXPR>: Don't optimize
    if type is unsigned and code isn't MULT_EXPR.

    * gcc.c-torture/execute/pr56250.c: New test.

Added:
    branches/gcc-4_7-branch/gcc/testsuite/gcc.c-torture/execute/pr56250.c
Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/fold-const.c
    branches/gcc-4_7-branch/gcc/testsuite/ChangeLog