diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -1491,8 +1491,11 @@
   }
 
   // Now that we have all of the passes ready, run them.
-  PrettyStackTraceString CrashInfo("Optimizer");
-  MPM.run(*TheModule, MAM);
+  {
+    PrettyStackTraceString CrashInfo("Optimizer");
+    llvm::TimeTraceScope TimeScope("Optimizer");
+    MPM.run(*TheModule, MAM);
+  }
 }
 
 void EmitAssemblyHelper::RunCodegenPipeline(
@@ -1524,8 +1527,11 @@
     return;
   }
 
-  PrettyStackTraceString CrashInfo("Code generation");
-  CodeGenPasses.run(*TheModule);
+  {
+    PrettyStackTraceString CrashInfo("Code generation");
+    llvm::TimeTraceScope TimeScope("CodeGenPasses");
+    CodeGenPasses.run(*TheModule);
+  }
 }
 
 /// A clean version of `EmitAssembly` that uses the new pass manager.