diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index 1420aaddb9802..ad979d5497f23 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -122,6 +122,7 @@
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/SaveAndRestore.h"
+#include "llvm/Support/TimeProfiler.h"
 #include "llvm/Support/Timer.h"
 #include "llvm/Support/VersionTuple.h"
 #include "llvm/Support/raw_ostream.h"
@@ -4208,6 +4209,8 @@ ASTReader::ASTReadResult ASTReader::ReadAST(StringRef FileName,
                                             SourceLocation ImportLoc,
                                             unsigned ClientLoadCapabilities,
                                             SmallVectorImpl<ImportedSubmodule> *Imported) {
+  llvm::TimeTraceScope scope("ReadAST", FileName);
+
   llvm::SaveAndRestore<SourceLocation>
     SetCurImportLocRAII(CurrentImportLoc, ImportLoc);
   llvm::SaveAndRestore<Optional<ModuleKind>> SetCurModuleKindRAII(
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 73441a6efbc97..6bfbf0b57f5b8 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -100,6 +100,7 @@
 #include "llvm/Support/OnDiskHashTable.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/SHA1.h"
+#include "llvm/Support/TimeProfiler.h"
 #include "llvm/Support/VersionTuple.h"
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
@@ -4484,6 +4485,7 @@ ASTFileSignature ASTWriter::WriteAST(Sema &SemaRef, StringRef OutputFile,
                                      Module *WritingModule, StringRef isysroot,
                                      bool hasErrors,
                                      bool ShouldCacheASTInMemory) {
+  llvm::TimeTraceScope scope("WriteAST", OutputFile);
   WritingAST = true;
 
   ASTHasCompilerErrors = hasErrors;