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

[Michael Kruse via llvm-commits]

================
@@ -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 MDTuple *M = dyn_cast_or_null<MDTuple>(MetadataIn);
+  // The loop metadata options should start with a MDString.
+  if (!M || M->getNumOperands() < 1 || !isa<MDString>(M->getOperand(0)))
+    return MetadataIn;
+
+  bool Updated = false;
+  SmallVector<Metadata *, 4> MDs{M->getOperand(0)};
+  for (Metadata *MD : llvm::drop_begin(M->operands())) {
+    if (!MD)
+      MDs.push_back(nullptr);
+    else {
----------------
Meinersbur wrote:

```suggestion
    if (!MD) {
      MDs.push_back(nullptr);
      continue;
    }
```
[style] [Use Early Exits and continue to Simplify Code](https://llvm.org/docs/CodingStandards.html#use-early-exits-and-continue-to-simplify-code)

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