[llvm] [VPlan] Manage noalias/alias_scope metadata in VPlan. (NFC) (PR #136450)

[via llvm-commits]

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@@ -1198,10 +1200,14 @@ class VPIRMetadata {
 protected:
   VPIRMetadata() {}
   VPIRMetadata(Instruction &I) { getMetadataToPropagate(&I, Metadata); }
+  VPIRMetadata(MDArrayRef Metadata) : Metadata(Metadata) {}
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ayalz wrote:

Should this be a copy constructor, i.e., given a (const) VPIRMetada& to clone / copy from, who should have access to the latter's Metadata w/o exposing getMetadata()?

https://github.com/llvm/llvm-project/pull/136450