[llvm] [VP] Refactor VectorBuilder to avoid layering violation. NFC (PR #99276)

[Fraser Cormack via llvm-commits]

================
@@ -569,6 +569,9 @@ class VPIntrinsic : public IntrinsicInst {
   /// The llvm.vp.* intrinsics for this instruction Opcode
   static Intrinsic::ID getForOpcode(unsigned OC);
 
+  /// The llvm.vp.reduce.* intrinsics for this intrinsic.
----------------
frasercrmck wrote:

Might want to document what happens when passed VP intrinsics, too

https://github.com/llvm/llvm-project/pull/99276