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

[Adrian Prantl via Phabricator via cfe-commits]

aprantl added inline comments.


================
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) {
----------------
Do you need a writeable copy, or could you get by with returning an `ArrayRef<TrackingMDNodeRef>`?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D143984/new/

https://reviews.llvm.org/D143984