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Date: Thu, 4 Jan 2024 14:49:20 +0100
From: Jan Hubicka <hubicka@ucw.cz>
To: "xry111 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
Cc: gcc-bugs@gcc.gnu.org
Subject: Re: [Bug target/113233] LoongArch: target options from LTO objects
 not respected during linking
Message-ID: <ZZa3YLmtFG4uB_yG@kam.mff.cuni.cz>
References: <bug-113233-4@http.gcc.gnu.org/bugzilla/>
 <bug-113233-4-NAh1yOu2HI@http.gcc.gnu.org/bugzilla/>
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> Confirm.  But option save/restore has been always implemented:
> 
>     .section    .gnu.lto_.opts,"",@progbits
>     .ascii  "'-fno-openmp' '-fno-openacc' '-fno-pie' '-fcf-protection"
>     .ascii  "=none' '-mabi=lp64d' '-march=loongarch64' '-mfpu=64' '-m"
>     .ascii  "simd=lasx' '-mcmodel=normal' '-mtune=loongarch64' '-flto"
>     .ascii  "'\000"
> 
> So -msimd=lasx is correctly recorded.  Not sure why it does not work.

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.