[llvm] [VP][RISCV] Introduce vp.splat and RISC-V. (PR #98731)

[Fraser Cormack via llvm-commits]

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@@ -777,6 +777,13 @@ END_REGISTER_VP(experimental_vp_reverse, EXPERIMENTAL_VP_REVERSE)
 
 ///// } Shuffles
 
+// llvm.vp.splat(ptr,val,mask,vlen)
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frasercrmck wrote:

`llvm.experimental.vp.splat(val,mask,vlen)` or `x` or something.

https://github.com/llvm/llvm-project/pull/98731