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Subject: [Bug tree-optimization/94655] [10/11 Regression] -Wstringop-overflow
 on implicit string assignment with vectorized char store
Date: Thu, 04 Mar 2021 00:05:41 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94655

--- Comment #16 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Sebor <msebor@gcc.gnu.org>:

https://gcc.gnu.org/g:8d57bdadd2d9c2e5c95515ca7a583d7b407b55c4

commit r11-7497-g8d57bdadd2d9c2e5c95515ca7a583d7b407b55c4
Author: Martin Sebor <msebor@redhat.com>
Date:   Wed Mar 3 16:56:45 2021 -0700

    Correct a workaround for vectorized stores.

    Resolves:
    PR middle-end/96963 - -Wstringop-overflow false positive with
-ftree-vectorize when assigning consecutive char struct members
    PR middle-end/94655 - -Wstringop-overflow on implicit string assignment
with vectorized char store

    gcc/ChangeLog:

            PR middle-end/96963
            PR middle-end/94655
            * builtins.c (handle_array_ref): New helper.
            (handle_mem_ref): New helper.
            (compute_objsize_r): Factor out ARRAY_REF and MEM_REF handling
            into new helper functions.  Correct a workaround for vectorized
            assignments.

    gcc/testsuite/ChangeLog:

            PR middle-end/96963
            PR middle-end/94655
            * gcc.dg/Wstringop-overflow-47.c: Xfail tests.
            * gcc.dg/Wstringop-overflow-65.c: New test.
            * gcc.dg/Warray-bounds-69.c: Same.=