[NFC] [Modules] Adding profiling points to template lookups in serializer

Author: ChuanqiXu9

clang/lib/Serialization/ASTReader.cpp

@@ -8381,6 +8381,15 @@ bool ASTReader::LoadExternalSpecializationsImpl(
   if (It == SpecLookups.end())
     return false;
 
+  llvm::TimeTraceScope TimeScope("Load External Specializations for ", [&] {
+    std::string Name;
+    llvm::raw_string_ostream OS(Name);
+    auto *ND = cast<NamedDecl>(D);
+    ND->getNameForDiagnostic(OS, ND->getASTContext().getPrintingPolicy(),
+                             /*Qualified=*/true);
+    return Name;
+  });
+
   Deserializing LookupResults(this);
   auto HashValue = StableHashForTemplateArguments(TemplateArgs);
 

clang/lib/Serialization/TemplateArgumentHasher.cpp

@@ -15,6 +15,7 @@
 #include "clang/AST/TypeVisitor.h"
 #include "clang/Basic/IdentifierTable.h"
 #include "llvm/ADT/FoldingSet.h"
+#include "llvm/Support/TimeProfiler.h"
 
 using namespace clang;
 
@@ -405,6 +406,7 @@ void TemplateArgumentHasher::AddType(const Type *T) {
 
 unsigned clang::serialization::StableHashForTemplateArguments(
     llvm::ArrayRef<TemplateArgument> Args) {
+  llvm::TimeTraceScope TimeScope("Stable Hash for Template Arguments");
   TemplateArgumentHasher Hasher;
   Hasher.AddInteger(Args.size());
   for (TemplateArgument Arg : Args)