[Bug tree-optimization/53501] [4.5/4.6/4.7/4.8 Regression] scev introduces signed overflow

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53501

--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-30 12:32:17 UTC ---
Author: rguenth
Date: Wed May 30 12:32:10 2012
New Revision: 188010

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=188010
Log:
2012-05-30  Richard Guenther  <rguenther@suse.de>

    PR middle-end/53501
    * fold-const.c (fold_binary_loc): Make sure to call
    fold_plusminus_mult_expr with the original sign of operands.

    * gcc.dg/torture/pr53501.c: New testcase.
    * c-c++-common/restrict-2.c: Adjust.

Added:
    branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/torture/pr53501.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
    branches/gcc-4_7-branch/gcc/testsuite/c-c++-common/restrict-2.c