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From: "liuhongt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/115351] [14/15 regression] pointless movs when
 passing by value on x86-64
Date: Wed, 05 Jun 2024 07:21:05 +0000
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X-Bugzilla-Component: rtl-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D115351

Hongtao Liu <liuhongt at gcc dot gnu.org> changed:

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

--- Comment #2 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
There're=20

(insn 5 4 6 2 (set (reg:TI 110)
        (ior:TI (and:TI (reg:TI 110)
                (const_wide_int 0xffffffffffffffff0000000000000000))
            (zero_extend:TI (subreg:DI (reg:DF 111) 0))))
"/app/example.cpp":8:1 136 {*insvti_lowpart_1}
     (nil))
(insn 6 5 7 2 (set (reg:TI 110)
        (ior:TI (and:TI (reg:TI 110)
                (const_wide_int 0x0ffffffffffffffff))
            (ashift:TI (zero_extend:TI (subreg:DI (reg:DF 112) 0))
                (const_int 64 [0x40])))) "/app/example.cpp":8:1 133
{*insvti_highpart_1}
     (nil))
(insn 7 6 8 2 (set (reg/v:TI 109 [ z ])

in GCC14's rtl dump, guess related to r14-589-g1e3054d27c83ee?=