[Bug middle-end/88273] [8 Regression] warning: 'memcpy' offset [-527, -529] is out of the bounds [0, 16] of object 'vrsave' with type 'union ' [-Warray-bounds]

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88273

--- Comment #14 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Mon Mar 18 19:44:02 2019
New Revision: 269778

URL: https://gcc.gnu.org/viewcvs?rev=269778&root=gcc&view=rev
Log:
Backport from mainline:

PR middle-end/88273 - [8/9 Regression] warning: 'memcpy' offset [-527, -529]
is out of the bounds [0, 16]

gcc/ChangeLog:

        PR middle-end/88273
        * gimple-ssa-warn-restrict.c (builtin_memref::extend_offset_range):
        Handle anti-ranges the same as no range at all.

gcc/testsuite/ChangeLog:

        PR middle-end/88273
        * gcc.dg/Warray-bounds-38.c: New test.

Added:
    branches/gcc-8-branch/gcc/testsuite/gcc.dg/Warray-bounds-38.c
Modified:
    branches/gcc-8-branch/gcc/ChangeLog
    branches/gcc-8-branch/gcc/gimple-ssa-warn-restrict.c
    branches/gcc-8-branch/gcc/testsuite/ChangeLog