[llvm] [RISCV] vsetvl pseudo may cross inline asm without sideeffect (PR #97794)

[Kito Cheng via llvm-commits]

kito-cheng wrote:

GCC no guarantee on this situation as well, I guess best way should be model the dep in the inline asm rather than mark vsetvli with sideeffect.

https://github.com/llvm/llvm-project/pull/97794