[Bug tree-optimization/80426] [6 Regression] wrong manipulation of range based on INT_MIN

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80426

--- Comment #12 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Fri Apr 21 08:37:13 2017
New Revision: 247050

URL: https://gcc.gnu.org/viewcvs?rev=247050&root=gcc&view=rev
Log:
        Backport from mainline
        2017-04-19  Eric Botcazou  <ebotcazou@adacore.com>
                    Jakub Jelinek  <jakub@redhat.com>

        PR tree-optimization/80426
        * tree-vrp.c (extract_range_from_binary_expr_1): For an additive
        operation on symbolic operands, also compute the overflow for the
        invariant part when the operation degenerates into a negation.

Added:
    branches/gcc-6-branch/gcc/testsuite/gcc.c-torture/execute/20170419-1.c
      - copied unchanged from r247047,
trunk/gcc/testsuite/gcc.c-torture/execute/20170419-1.c
Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/tree-vrp.c