Subzero: Improve the use of timers.

src/IceCfg.h

 //===- subzero/src/IceCfg.h - Control flow graph ----------------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 209 matching lines @@
   /// @}
 
   /// Get the total amount of memory held by the per-Cfg allocator.  This is
   /// mostly meant for use inside a debugger.
   static size_t getTotalMemoryMB();
 
   void emit();
   void emitIAS();
   static void emitTextHeader(const IceString &Name, GlobalContext *Ctx,
                              const Assembler *Asm);
-  void dump(const IceString &Message = "");
+  void dump(const char *Message = "");
 
   /// Allocate data of type T using the per-Cfg allocator.
   template <typename T> T *allocate() { return Allocator->Allocate<T>(); }
 
   /// Allocate an array of data of type T using the per-Cfg allocator.
   template <typename T> T *allocateArrayOf(size_t NumElems) {
     return Allocator->Allocate<T>(NumElems);
   }
 
   /// Deallocate data that was allocated via allocate<T>().
@@ skipping 70 matching lines @@
 
 public:
   static void TlsInit() { CfgAllocatorTraits::init(); }
 };
 
 template <> Variable *Cfg::makeVariable<Variable>(Type Ty);
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICECFG_H