[llvm] [VectorUtils] Add helper to get list of metadata to propagate (NFC). (PR #135003)

[Matt Arsenault via llvm-commits]

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@@ -984,19 +984,38 @@ MDNode *llvm::intersectAccessGroups(const Instruction *Inst1,
   return MDNode::get(Ctx, Intersection);
 }
 
+/// Add metadata from \p Inst to \p Metadata, if it can be preserved after
+/// vectorization.
+static void getMetadataToPropagate(
+    Instruction *Inst,
+    SmallVectorImpl<std::pair<unsigned, MDNode *>> &Metadata) {
+  Inst->getAllMetadataOtherThanDebugLoc(Metadata);
+  unsigned SupportedIDs[] = {
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arsenm wrote:

static const? 

https://github.com/llvm/llvm-project/pull/135003