https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120201

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|generates a misaligned      |[14/15/16/17 Regression]
                   |vector operation for        |generates a misaligned
                   |std::memcpy with            |vector operation for
                   |-march=znver4 since         |std::memcpy with
                   |santizer doesn't allocate   |-march=znver4 since
                   |properly aligned stack      |santizer doesn't allocate
                   |                            |properly aligned stack by
                   |                            |r6-6813-g63998a6336239d
                 CC|                            |law at gcc dot gnu.org,
                   |                            |rguenth at gcc dot gnu.org

--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
This is introduced by

commit 63998a6336239da20540a9e4b529d839ed2db26e
Author: Richard Biener <[email protected]>
Date:   Mon Feb 8 10:04:18 2016 +0000

    re PR target/68273 (Wrong code on mips/mipsel due to (invalid?) peeking at
alignments in function_arg.)

    2016-02-08  Richard Biener  <[email protected]>
            Jeff Law  <[email protected]>

            PR target/68273
            * tree-ssanames.c (make_ssa_name_fn): Always use unqualified
            types for anonymous SSA names.

            * gcc.target/mips/pr68273.c: New testcase.

    Co-Authored-By: Jeff Law <[email protected]>

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