Subzero: Count lookups of each constant value in the constant pool.

src/IceGlobalContext.h

 //===- subzero/src/IceGlobalContext.h - Global context defs -----*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 410 matching lines @@
   void emitItems();
 
   /// Uses DataLowering to lower Globals. Side effects:
   ///  - discards the initializer list for the global variable in Globals.
   ///  - clears the Globals array.
   void lowerGlobals(const IceString &SectionSuffix);
 
   /// Lowers the profile information.
   void lowerProfileData();
 
+  void dumpConstantLookupCounts();
+
   /// Utility function to match a symbol name against a match string. This is
   /// used in a few cases where we want to take some action on a particular
   /// function or symbol based on a command-line argument, such as changing the
   /// verbose level for a particular function. An empty Match argument means
   /// match everything. Returns true if there is a match.
   static bool matchSymbolName(const IceString &SymbolName,
                               const IceString &Match) {
     return Match.empty() || Match == SymbolName;
   }
 
@@ skipping 163 matching lines @@
   explicit OstreamLocker(GlobalContext *Ctx) : Ctx(Ctx) { Ctx->lockStr(); }
   ~OstreamLocker() { Ctx->unlockStr(); }
 
 private:
   GlobalContext *const Ctx;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEGLOBALCONTEXT_H