Subzero: Rewrite the pass timing infrastructure.

src/IceOperand.cpp

 //===- subzero/src/IceOperand.cpp - High-level operand implementation -----===//
 //
 //                        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 Operand class and its target-independent
@@ skipping 241 matching lines @@
   case MDS_MultiDefMultiBlock:
   case MDS_MultiDefSingleBlock:
     return NULL;
   case MDS_SingleDef:
     assert(!Definitions.empty());
     return Definitions[0];
   }
 }
 
 void VariablesMetadata::init() {
+  TimerMarker T("vmetadata", Func->getContext());
   Metadata.clear();
   Metadata.resize(Func->getNumVariables());
 
   // Mark implicit args as being used in the entry node.
   const VarList &ImplicitArgList = Func->getImplicitArgs();
   for (VarList::const_iterator I = ImplicitArgList.begin(),
                                E = ImplicitArgList.end();
        I != E; ++I) {
     const Variable *Var = *I;
     const Inst *NoInst = NULL;
@@ skipping 164 matching lines @@
 
 Ostream &operator<<(Ostream &Str, const RegWeight &W) {
   if (W.getWeight() == RegWeight::Inf)
     Str << "Inf";
   else
     Str << W.getWeight();
   return Str;
 }
 
 } // end of namespace Ice