[llvm] [DebugInfo] Handle followup loop metadata in updateLoopMetadataDebugLocations (PR #157557)

[Stephen Tozer via llvm-commits]

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@@ -375,6 +375,32 @@ bool DebugInfoFinder::addScope(DIScope *Scope) {
   return true;
 }
 
+// Recursively handle DILocations in followup metadata etc.
+static Metadata *updateLoopMetadataDebugLocationsRecursive(
+    Metadata *MetadataIn, function_ref<Metadata *(Metadata *)> Updater) {
+  const MDNode *M = dyn_cast_or_null<MDNode>(MetadataIn);
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SLTozer wrote:

Minor detail, but I think this should probably be `MDTuple` rather than `MDNode` - we're already implicitly assuming an `MDTuple` when we choose to replace it with `MDNode::get` below, so better to make that explicit.

https://github.com/llvm/llvm-project/pull/157557