Subzero: Refactor tracking of Defs and block-local Variables.

src/IceDefs.h

 //===- subzero/src/IceDefs.h - Common Subzero declaraions -------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares various useful types and classes that have
@@ skipping 39 matching lines @@
 class Constant;
 class GlobalContext;
 class Inst;
 class InstPhi;
 class InstTarget;
 class LiveRange;
 class Liveness;
 class Operand;
 class TargetLowering;
 class Variable;
+class VariablesMetadata;
 
 // TODO: Switch over to LLVM's ADT container classes.
 // http://llvm.org/docs/ProgrammersManual.html#picking-the-right-data-structure-for-a-task
 typedef std::string IceString;
 typedef std::list<Inst *> InstList;
 typedef std::list<InstPhi *> PhiList;
 typedef std::vector<Variable *> VarList;
 typedef std::vector<Operand *> OperandList;
 typedef std::vector<CfgNode *> NodeList;
 typedef std::vector<Constant *> ConstantList;
@@ skipping 60 matching lines @@
 };
 
 template <typename T> bool WouldOverflowAdd(T X, T Y) {
   return ((X > 0 && Y > 0 && (X > std::numeric_limits<T>::max() - Y)) ||
           (X < 0 && Y < 0 && (X < std::numeric_limits<T>::min() - Y)));
 }
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEDEFS_H