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Subject: [Bug target/102125] (ARM Cortex-M3 and newer) missed optimization.
 memcpy not needed operations
Date: Mon, 13 Sep 2021 10:27:13 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102125

--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Earnshaw <rearnsha@gcc.gnu.or=
g>:

https://gcc.gnu.org/g:408e8b906632f215f6652b8851bba612cde07c25

commit r12-3480-g408e8b906632f215f6652b8851bba612cde07c25
Author: Richard Earnshaw <rearnsha@arm.com>
Date:   Thu Sep 9 10:56:01 2021 +0100

    rtl: directly handle MEM in gen_highpart [PR102125]

    gen_lowpart_general handles forming a lowpart of a MEM by using
    adjust_address to rework and validate a new version of the MEM.
    Do the same for gen_highpart rather than calling simplify_gen_subreg
    for this case.

    gcc/ChangeLog:

            PR target/102125
            * emit-rtl.c (gen_highpart): Use adjust_address to handle
            MEM rather than calling simplify_gen_subreg.=