[llvm] [VPlan] Move recording of Inst->VPValue to VPRecipeBuilder (NFCI). (PR #84464)

[via llvm-commits]

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@@ -172,6 +158,19 @@ class VPRecipeBuilder {
   /// Add the incoming values from the backedge to reduction & first-order
   /// recurrence cross-iteration phis.
   void fixHeaderPhis();
+
+  /// Returns a range mapping the values the range \p Operands to their
+  /// corresponding VPValues.
+  iterator_range<mapped_iterator<Use *, std::function<VPValue *(Value *)>>>
+  mapToVPValues(User::op_range Operands, VPlan &Plan);
+
+  VPValue *getVPValue(Value *V, VPlan &Plan) {
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ayalz wrote:

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https://github.com/llvm/llvm-project/pull/84464