[Bug c/61741] wrong code with -fno-strict-overflow

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61741

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jul 17 07:57:30 2014
New Revision: 212742

URL: https://gcc.gnu.org/viewcvs?rev=212742&root=gcc&view=rev
Log:
2014-07-17  Richard Biener  <rguent...@suse.de>

    Backport from mainline
    2014-07-10  Richard Biener  <rguent...@suse.de>

    PR c-family/61741
    * c-c++-common/torture/pr61741.c: Use signed char.

    2014-07-09  Richard Biener  <rguent...@suse.de>

    PR c-family/61741
    * c-gimplify.c (c_gimplify_expr): Gimplify self-modify expressions
    using unsigned arithmetic if overflow does not wrap instead of
    if overflow is undefined.

    * c-c++-common/torture/pr61741.c: New testcase.

Added:
    branches/gcc-4_9-branch/gcc/testsuite/c-c++-common/pr61741.c
Modified:
    branches/gcc-4_9-branch/gcc/c-family/ChangeLog
    branches/gcc-4_9-branch/gcc/c-family/c-gimplify.c
    branches/gcc-4_9-branch/gcc/testsuite/ChangeLog