[llvm] [VPlan] Track VPValue names in VPlan. (PR #81411)

[Florian Hahn via llvm-commits]

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@@ -446,6 +461,7 @@ class VPBasicBlock;
 /// VPlan and allows querying the numbering for printing, similar to the
 /// ModuleSlotTracker for IR values.
 class VPSlotTracker {
+  const VPlan *Plan;
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fhahn wrote:

Yes, it is needed to retrieve names for live-in VPValues that don't have underlying IR values

https://github.com/llvm/llvm-project/pull/81411