[llvm] [RISCV] Use vsetvli instead of vlenb in Prologue/Epilogue (PR #113756)

[Craig Topper via llvm-commits]

topperc wrote:

> Although one thing to consider is that ooo implementations will need to predict vtype/vl, and this may fill up the predictors quicker.

Do you know of ooo implementations implementing a predictor?

https://github.com/llvm/llvm-project/pull/113756