Subzero: Add -Wshadow to the build.

src/IceLiveness.h

 //===- subzero/src/IceLiveness.h - Liveness analysis ------------*- 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 the Liveness and LivenessNode classes,
@@ skipping 42 matching lines @@
     // LivenessNode::NumGlobals.
     LivenessBV LiveIn, LiveOut;
     // LiveBegin and LiveEnd track the instruction numbers of the start
     // and end of each variable's live range within this block.  The
     // index/key of each element is less than NumLocals +
     // Liveness::NumGlobals.
     LiveBeginEndMap LiveBegin, LiveEnd;
   };
 
 public:
-  Liveness(Cfg *Func, LivenessMode Mode) : Func(Func), Mode(Mode) {}
+  Liveness(Cfg *MyFunc, LivenessMode MyMode) : Func(MyFunc), Mode(MyMode) {}
   void init();
   Cfg *getFunc() const { return Func; }
   LivenessMode getMode() const { return Mode; }
   Variable *getVariable(SizeT LiveIndex, const CfgNode *Node) const;
   SizeT getLiveIndex(SizeT VarIndex) const { return VarToLiveMap[VarIndex]; }
   SizeT getNumGlobalVars() const { return NumGlobals; }
   SizeT getNumVarsInNode(const CfgNode *Node) const {
     return NumGlobals + Nodes[Node->getIndex()].NumLocals;
   }
   SizeT &getNumNonDeadPhis(const CfgNode *Node) {
@@ skipping 35 matching lines @@
   // within its basic block.
   std::vector<SizeT> VarToLiveMap;
   // LiveToVarMap is analogous to LivenessNode::LiveToVarMap, but for
   // non-local variables.
   std::vector<Variable *> LiveToVarMap;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICELIVENESS_H