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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/113180] MIPS: bitops on an long long struct uses ins
 instead dins (or with -mstrict-align on aarch64)
Date: Sun, 31 Dec 2023 06:31:12 +0000
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X-Bugzilla-Type: changed
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: middle-end
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X-Bugzilla-Keywords: missed-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113180

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
          Component|target                      |middle-end
             Target|mips                        |mips aarch64*-*-*
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |missed-optimization
   Last reconfirmed|                            |2023-12-31
            Summary|MIPS: bitops on an long     |MIPS: bitops on an long
                   |long struct uses ins        |long struct uses ins
                   |instead dins                |instead dins (or with
                   |                            |-mstrict-align on aarch64)

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The same issue happens on aarch64 with -mstrict-align though it is not as b=
ad
as mips but the underlying issue is the same:
```
        sub     sp, sp, #32
        .cfi_def_cfa_offset 32
        str     x0, [sp, 8]
        lsr     x0, x0, 32
        bfi     w0, w1, 28, 4
        str     w0, [sp, 12]
        ldr     x0, [sp, 8]
        add     sp, sp, 32
        ret
```

Confirmed. there might be other bug reports which are very similar too.=