[ThinLTO] Add TimeTrace for Thinlink step

Results from Clang self-build:

{F17435948}

Testing:
ninja check-all

Reviewed By: anton-afanasyev

Differential Revision: https://reviews.llvm.org/D104428

1 files changed, 11 insertions, 0 deletions

diff --git a/llvm/lib/LTO/LTO.cpp b/llvm/lib/LTO/LTO.cpp
index 69d500b..deb367b 100644
--- a/llvm/lib/LTO/LTO.cpp
+++ b/llvm/lib/LTO/LTO.cpp
@@ -11,6 +11,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/LTO/LTO.h"
+#include "llvm/ADT/ScopeExit.h"
 #include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/ADT/StringExtras.h"
@@ -1398,6 +1399,11 @@ ThinBackend lto::createWriteIndexesThinBackend(
 
 Error LTO::runThinLTO(AddStreamFn AddStream, NativeObjectCache Cache,
                       const DenseSet<GlobalValue::GUID> &GUIDPreservedSymbols) {
+  timeTraceProfilerBegin("ThinLink", StringRef(""));
+  auto TimeTraceScopeExit = llvm::make_scope_exit([]() {
+    if (llvm::timeTraceProfilerEnabled())
+      llvm::timeTraceProfilerEnd();
+  });
   if (ThinLTO.ModuleMap.empty())
     return Error::success();
 
@@ -1512,6 +1518,11 @@ Error LTO::runThinLTO(AddStreamFn AddStream, NativeObjectCache Cache,
 
   generateParamAccessSummary(ThinLTO.CombinedIndex);
 
+  if (llvm::timeTraceProfilerEnabled())
+    llvm::timeTraceProfilerEnd();
+
+  TimeTraceScopeExit.release();
+
   std::unique_ptr<ThinBackendProc> BackendProc =
       ThinLTO.Backend(Conf, ThinLTO.CombinedIndex, ModuleToDefinedGVSummaries,
                       AddStream, Cache);