[Bug target/112478] riscv: asm clobbers not honored

[kito at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112478

--- Comment #8 from Kito Cheng <kito at gcc dot gnu.org> ---
Proposed fix:
https://gcc.gnu.org/pipermail/gcc-patches/2023-November/636466.html