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Subject: [Bug target/111121] AArch64: MOPS memmove operand corruption
Date: Fri, 29 Sep 2023 12:14:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111121

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by Wilco Dijkstra
<wilco@gcc.gnu.org>:

https://gcc.gnu.org/g:c534a9b198caa3807bcc592a3c5bac3f971417f7

commit r13-7921-gc534a9b198caa3807bcc592a3c5bac3f971417f7
Author: Wilco Dijkstra <wilco.dijkstra@arm.com>
Date:   Tue Sep 26 16:42:45 2023 +0100

    AArch64: Fix memmove operand corruption [PR111121]

    A MOPS memmove may corrupt registers since there is no copy of the input
    operands to temporary registers.  Fix this by calling
    aarch64_expand_cpymem_mops.

    Reviewed-by: Richard Sandiford <richard.sandiford@arm.com>

    gcc/ChangeLog/
            PR target/111121
            * config/aarch64/aarch64.md (aarch64_movmemdi): Add new expande=
r.
            (movmemdi): Call aarch64_expand_cpymem_mops for correct expansi=
on.
            * config/aarch64/aarch64.cc (aarch64_expand_cpymem_mops): Add
support
            for memmove.
            * config/aarch64/aarch64-protos.h (aarch64_expand_cpymem_mops):=
 Add
new
            function.

    gcc/testsuite/ChangeLog/
            PR target/111121
            * gcc.target/aarch64/mops_4.c: Add memmove testcases.

    (cherry picked from commit d8b56c95782aeeee79ec40932ca88d00fd9f2ee2)=