[llvm] Allow the dumping of .dwo files contents to show up when dumping an e… (PR #66726)

[David Blaikie via llvm-commits]

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@@ -399,6 +408,21 @@ static void filterByName(
       if (const char *Name = Die.getName(DINameKind::LinkageName))
         filterByName(Names, Die, Name, OS, GetNameForDWARFReg);
     }
+    // If we have split DWARF, then recurse down into the .dwo files as well.
+    DWARFDie CUDie = CU->getUnitDIE(false);
+    DWARFDie CUNonSkeletonDie = CU->getNonSkeletonUnitDIE(false);
+    if (CUNonSkeletonDie && CUDie != CUNonSkeletonDie) {
+      // We have a DWO file, we need to search it as well
+      for (const auto &Entry : CUNonSkeletonDie.getDwarfUnit()->dies()) {
+        DWARFDie Die = {CUNonSkeletonDie.getDwarfUnit(), &Entry};
+        if (const char *Name = Die.getShortName())
+          if (filterByName(Names, Die, Name, OS, GetNameForDWARFReg))
+            continue;
+        if (const char *Name = Die.getLinkageName())
+          filterByName(Names, Die, Name, OS, GetNameForDWARFReg);
+      }
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dwblaikie wrote:

Perhaps put this in a lambda and reuse it from both sites, rather than duplicating it from th enon-split case?

https://github.com/llvm/llvm-project/pull/66726