[llvm] [IR] Speed up debug printing with persistent metadata IDs (PR #216838)

[Alexis Engelke via llvm-commits]

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@@ -3105,6 +3124,10 @@ void AssemblyWriter::writeOperandBundles(const CallBase *Call) {
 void AssemblyWriter::printModule(const Module *M) {
   Machine.initializeIfNeeded();
 
+  for (const GlobalObject &GO : M->global_objects())
+    if (const Comdat *C = GO.getComdat())
+      Comdats.insert(C);
+
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aengelke wrote:

This is unrelated and should be a separate change.

https://github.com/llvm/llvm-project/pull/216838