Subzero: Improve the use of timers.

src/IceConverter.cpp

 //===- subzero/src/IceConverter.cpp - Converts LLVM to Ice  ---------------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 895 matching lines @@
     }
     GlobalDeclarationMap[GV] = Var;
   }
 }
 
 void Converter::convertGlobals(Module *Mod) {
   lowerGlobals(LLVM2ICEGlobalsConverter(*this).convertGlobalsToIce(Mod));
 }
 
 void Converter::convertFunctions() {
-  const TimerStackIdT StackID = GlobalContext::TSK_Funcs;
   for (const Function &I : *Mod) {
     if (I.empty())
       continue;
-
-    TimerIdT TimerID = 0;
-    const bool TimeThisFunction = Ctx->getFlags().getTimeEachFunction();
-    if (TimeThisFunction) {
-      TimerID = Ctx->getTimerID(StackID, I.getName());
-      Ctx->pushTimer(TimerID, StackID);
-    }
+    TimerMarker _(Ctx, I.getName());
     LLVM2ICEFunctionConverter FunctionConverter(*this);
     FunctionConverter.convertFunction(&I);
-    if (TimeThisFunction)
-      Ctx->popTimer(TimerID, StackID);
   }
 }
 
 } // end of namespace Ice