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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/96305] Unnecessary signed x unsigned multiplication with
 squares of signed variables
Date: Fri, 24 Jul 2020 08:46:44 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96305

ktkachov at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ktkachov at gcc dot gnu.org

--- Comment #1 from ktkachov at gcc dot gnu.org ---
This did get a bit better in GCC 10.1, which generates:
compute:
        smull   r0, r3, r0, r0
        asrs    r0, r1, #31
        muls    r0, r3, r0
        asrs    r2, r3, #31
        mla     r0, r1, r2, r0
        umull   r3, r1, r3, r1
        add     r0, r0, r1
        bx      lr=