[PATCH] D143984: [DebugMetadata] Simplify handling subprogram's retainedNodes field. NFCI (1/7)

[Kristina Bessonova via Phabricator via llvm-commits]

krisb marked an inline comment as done.
krisb added inline comments.


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Comment at: llvm/include/llvm/IR/DIBuilder.h:76
 
-    /// Each subprogram's preserved labels.
-    DenseMap<MDNode *, SmallVector<TrackingMDNodeRef, 1>> PreservedLabels;
+    SmallVectorImpl<TrackingMDNodeRef> &
+    getSubprogramNodesTrackingVector(const DIScope *S) {
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aprantl wrote:
> Do you need a writeable copy, or could you get by with returning an `ArrayRef<TrackingMDNodeRef>`?
It should return smth suitable to emplace new elements, so, right, we need a writable reference here.


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