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From: "xry111 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/113233] LoongArch: target options from LTO objects not
 respected during linking
Date: Thu, 04 Jan 2024 13:51:59 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113233

--- Comment #4 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #3)
> > Confirm.  But option save/restore has been always implemented:
> >=20
> >     .section    .gnu.lto_.opts,"",@progbits
> >     .ascii  "'-fno-openmp' '-fno-openacc' '-fno-pie' '-fcf-protection"
> >     .ascii  "=3Dnone' '-mabi=3Dlp64d' '-march=3Dloongarch64' '-mfpu=3D6=
4' '-m"
> >     .ascii  "simd=3Dlasx' '-mcmodel=3Dnormal' '-mtune=3Dloongarch64' '-=
flto"
> >     .ascii  "'\000"
> >=20
> > So -msimd=3Dlasx is correctly recorded.  Not sure why it does not work.
>=20
> With LTO we need to mix code compiled with different sets of options.
> For this reason we imply for every function defition and optimization
> and target attribute which record the flags.  So it seems target
> attribute is likely broken for this flag.

Target attribute is not implemented for LoongArch.  And I don't think it's a
good idea to implement it in stage 3.=