Subzero: Add a few performance measurement tools.

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.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the LLVM to ICE converter.
@@ skipping 41 matching lines @@
 // https://developers.google.com/native-client/dev/reference/pnacl-bitcode-abi
 // If not, all kinds of assertions may fire.
 //
 class LLVM2ICEConverter {
 public:
   LLVM2ICEConverter(Ice::GlobalContext *Ctx, LLVMContext &LLVMContext)
       : Ctx(Ctx), Func(NULL), TypeConverter(LLVMContext) {}
 
   // Caller is expected to delete the returned Ice::Cfg object.
   Ice::Cfg *convertFunction(const Function *F) {
-    static Ice::TimerIdT IDllvmConvert =
-        Ice::GlobalContext::getTimerID("llvmConvert");
-    Ice::TimerMarker T(IDllvmConvert, Ctx);
     VarMap.clear();
     NodeMap.clear();
     Func = new Ice::Cfg(Ctx);
     Func->setFunctionName(F->getName());
     Func->setReturnType(convertToIceType(F->getReturnType()));
     Func->setInternal(F->hasInternalLinkage());
+    Ice::TimerMarker T(Ice::TimerStack::TT_llvmConvert, Func);
 
     // The initial definition/use of each arg is the entry node.
     for (auto ArgI = F->arg_begin(), ArgE = F->arg_end(); ArgI != ArgE;
          ++ArgI) {
       Func->addArg(mapValueToIceVar(ArgI));
     }
 
     // Make an initial pass through the block list just to resolve the
     // blocks in the original linearized order.  Otherwise the ICE
     // linearized order will be affected by branch targets in
@@ skipping 529 matching lines @@
   std::map<const Value *, Ice::Variable *> VarMap;
   std::map<const BasicBlock *, Ice::CfgNode *> NodeMap;
   Ice::TypeConverter TypeConverter;
 };
 
 } // end of anonymous namespace
 
 namespace Ice {
 
 void Converter::convertToIce() {
-  static TimerIdT IDconvertToIce = GlobalContext::getTimerID("convertToIce");
-  TimerMarker T(IDconvertToIce, Ctx);
+  TimerMarker T(TimerStack::TT_convertToIce, Ctx);
   nameUnnamedGlobalAddresses(Mod);
   if (!Ctx->getFlags().DisableGlobals)
     convertGlobals(Mod);
   convertFunctions();
 }
 
 void Converter::convertFunctions() {
+  TimerStackIdT StackID = GlobalContext::TSK_Funcs;
   for (const Function &I : *Mod) {
     if (I.empty())
       continue;
+    TimerIdT TimerID = 0;
+    if (Ctx->getFlags().TimeEachFunction) {
+      TimerID = Ctx->getTimerID(StackID, I.getName());
+      Ctx->pushTimer(TimerID, StackID);
+    }
     LLVM2ICEConverter FunctionConverter(Ctx, Mod->getContext());
 
     Cfg *Fcn = FunctionConverter.convertFunction(&I);
     translateFcn(Fcn);
+    if (Ctx->getFlags().TimeEachFunction)
+      Ctx->popTimer(TimerID, StackID);
   }
 
   emitConstants();
 }
 
 } // end of namespace Ice