Subzero: Improve the use of timers.

src/IceTargetLowering.cpp

 //===- subzero/src/IceTargetLowering.cpp - Basic lowering implementation --===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 295 matching lines @@
 
 TargetLowering::AutoBundle::~AutoBundle() {
   assert(Target->AutoBundling);
   Target->AutoBundling = false;
   if (NeedSandboxing) {
     Target->_bundle_unlock();
   }
 }
 
 void TargetLowering::genTargetHelperCalls() {
+  TimerMarker T(TimerStack::TT_genHelpers, Func);
   Utils::BoolFlagSaver _(GeneratingTargetHelpers, true);
   for (CfgNode *Node : Func->getNodes()) {
     Context.init(Node);
     while (!Context.atEnd()) {
       PostIncrLoweringContext _(Context);
       genTargetHelperCallFor(Context.getCur());
     }
   }
 }
 
@@ skipping 553 matching lines @@
   case Target_##X:                                                             \
     return ::X::createTargetHeaderLowering(Ctx);
 #include "llvm/Config/SZTargets.def"
 #undef SUBZERO_TARGET
   }
 }
 
 TargetHeaderLowering::~TargetHeaderLowering() = default;
 
 } // end of namespace Ice