[lld] [llvm] [LLD][COFF] Add more `--time-trace` tags for ThinLTO linking (PR #156471)

[Alexandre Ganea via llvm-commits]

================
@@ -1900,102 +1905,114 @@ Expected<bool> FunctionImporter::importFunctions(
 
     // Find the globals to import
     SetVector<GlobalValue *> GlobalsToImport;
-    for (Function &F : *SrcModule) {
-      if (!F.hasName())
-        continue;
-      auto GUID = F.getGUID();
-      auto MaybeImportType = ImportList.getImportType(ModName, GUID);
-      bool ImportDefinition = MaybeImportType == GlobalValueSummary::Definition;
-
-      LLVM_DEBUG(dbgs() << (MaybeImportType ? "Is" : "Not")
-                        << " importing function"
-                        << (ImportDefinition
-                                ? " definition "
-                                : (MaybeImportType ? " declaration " : " "))
-                        << GUID << " " << F.getName() << " from "
-                        << SrcModule->getSourceFileName() << "\n");
-      if (ImportDefinition) {
-        if (Error Err = F.materialize())
-          return std::move(Err);
-        // MemProf should match function's definition and summary,
-        // 'thinlto_src_module' is needed.
-        if (EnableImportMetadata || EnableMemProfContextDisambiguation) {
-          // Add 'thinlto_src_module' and 'thinlto_src_file' metadata for
-          // statistics and debugging.
-          F.setMetadata(
-              "thinlto_src_module",
-              MDNode::get(DestModule.getContext(),
-                          {MDString::get(DestModule.getContext(),
-                                         SrcModule->getModuleIdentifier())}));
-          F.setMetadata(
-              "thinlto_src_file",
-              MDNode::get(DestModule.getContext(),
-                          {MDString::get(DestModule.getContext(),
-                                         SrcModule->getSourceFileName())}));
+    {
+      llvm::TimeTraceScope findGlobalsScope("Find globals");
----------------
aganea wrote:

Done.

https://github.com/llvm/llvm-project/pull/156471