[Bug middle-end/80362] [5/6 Regression] gcc miscompiles arithmetic with signed char

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80362

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Apr 10 13:02:12 2017
New Revision: 246805

URL: https://gcc.gnu.org/viewcvs?rev=246805&root=gcc&view=rev
Log:
2017-04-10  Richard Biener  <rguent...@suse.de>

        PR middle-end/80362
        * fold-const.c (fold_binary_loc): Look at unstripped ops when
        looking for NEGATE_EXPR in -A / -B to A / B folding.

        * gcc.dg/torture/pr80362.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr80362.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog