ftime-trace: Trace the name of the currently active pass as well.

Differential Revision: https://reviews.llvm.org/D60782

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358834 91177308-0d34-0410-b5e6-96231b3b80d8

lib/IR/LegacyPassManager.cpp

@@ -1629,14 +1629,14 @@ bool FPPassManager::runOnFunction(Function &F) {
     FunctionSize = F.getInstructionCount();
   }
 
-  bool ProfileTime = llvm::timeTraceProfilerEnabled();
-  if (ProfileTime)
-    llvm::timeTraceProfilerBegin("OptFunction", F.getName());
+  llvm::TimeTraceScope FunctionScope("OptFunction", F.getName());
 
   for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
     FunctionPass *FP = getContainedPass(Index);
     bool LocalChanged = false;
 
+    llvm::TimeTraceScope PassScope("RunPass", FP->getPassName());
+
     dumpPassInfo(FP, EXECUTION_MSG, ON_FUNCTION_MSG, F.getName());
     dumpRequiredSet(FP);
 
@@ -1674,9 +1674,6 @@ bool FPPassManager::runOnFunction(Function &F) {
     removeDeadPasses(FP, F.getName(), ON_FUNCTION_MSG);
   }
 
-  if (ProfileTime)
-    llvm::timeTraceProfilerEnd();
-
   return Changed;
 }