[Bug target/123171] LoongArch: target attribute "arch=XXX" is not properly scoped

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123171

--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by LuluCheng <chenglulu@gcc.gnu.org>:

https://gcc.gnu.org/g:a0001ef5843cb7d833976b38894f2b08f5c153b8

commit r16-6237-ga0001ef5843cb7d833976b38894f2b08f5c153b8
Author: WANG Xuerui <git@xen0n.name>
Date:   Thu Dec 18 13:42:33 2025 +0800

    LoongArch: Fix ISA base not being updated in loongarch_option_restore
[PR123171]

    Fixes switching between LA32S and LA32R base arches with target pragmas
    or attributes.

    Bootstrapped and regtested on loongarch64-linux-gnu.

            PR target/123171
    gcc/ChangeLog:

            * config/loongarch/loongarch.cc (loongarch_option_restore): Add
            missing update to la_target.isa.base.

    gcc/testsuite/ChangeLog:

            * gcc.target/loongarch/pr123171.c: New test.

    Suggested-by: Lulu Cheng <chenglulu@loongson.cn>
    Signed-off-by: WANG Xuerui <git@xen0n.name>