[Bug middle-end/84095] [8 Regression] false-positive -Wrestrict warnings for memcpy within array

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84095

--- Comment #18 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Feb 20 20:22:01 2018
New Revision: 257860

URL: https://gcc.gnu.org/viewcvs?rev=257860&root=gcc&view=rev
Log:
PR middle-end/84095 - false-positive -Wrestrict warnings for memcpy within
array

gcc/ChangeLog:

        PR middle-end/84095
        * gimple-ssa-warn-restrict.c (builtin_memref::extend_offset_range):
New.
        (builtin_memref::set_base_and_offset): Same.  Handle inner references.
        (builtin_memref::builtin_memref): Factor out parts into
        set_base_and_offset and call it.

gcc/testsuite/ChangeLog:

        PR middle-end/84095
        * c-c++-common/Warray-bounds-3.c: Adjust text of expected warnings.
        * c-c++-common/Wrestrict.c: Same.
        * gcc.dg/Wrestrict-6.c: Same.
        * gcc.dg/Warray-bounds-27.c: New test.
        * gcc.dg/Wrestrict-8.c: New test.
        * gcc.dg/Wrestrict-9.c: New test.
        * gcc.dg/pr84095.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/Warray-bounds-27.c
    trunk/gcc/testsuite/gcc.dg/Wrestrict-8.c
    trunk/gcc/testsuite/gcc.dg/Wrestrict-9.c
    trunk/gcc/testsuite/gcc.dg/pr84095.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-ssa-warn-restrict.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/c-c++-common/Warray-bounds-3.c
    trunk/gcc/testsuite/c-c++-common/Wrestrict.c
    trunk/gcc/testsuite/gcc.dg/Wrestrict-6.c