Subzero: Use C++11 member initializers where practical.

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 16 matching lines @@
 
 class Liveness {
   Liveness() = delete;
   Liveness(const Liveness &) = delete;
   Liveness &operator=(const Liveness &) = delete;
 
   class LivenessNode {
     LivenessNode &operator=(const LivenessNode &) = delete;
 
   public:
-    LivenessNode() : NumLocals(0), NumNonDeadPhis(0) {}
+    LivenessNode() = default;
     LivenessNode(const LivenessNode &) = default;
     // NumLocals is the number of Variables local to this block.
-    SizeT NumLocals;
+    SizeT NumLocals = 0;
     // NumNonDeadPhis tracks the number of Phi instructions that
     // Inst::liveness() identified as tentatively live.  If
     // NumNonDeadPhis changes from the last liveness pass, then liveness
     // has not yet converged.
-    SizeT NumNonDeadPhis;
+    SizeT NumNonDeadPhis = 0;
     // LiveToVarMap maps a liveness bitvector index to a Variable.  This
     // is generally just for printing/dumping.  The index should be less
     // than NumLocals + Liveness::NumGlobals.
     std::vector<Variable *> LiveToVarMap;
     // LiveIn and LiveOut track the in- and out-liveness of the global
     // variables.  The size of each vector is
     // 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), NumGlobals(0) {}
+  Liveness(Cfg *Func, LivenessMode Mode) : Func(Func), Mode(Mode) {}
   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 21 matching lines @@
   }
 
 private:
   // Resize Nodes so that Nodes[Index] is valid.
   void resize(SizeT Index) {
     if (Index >= Nodes.size())
       Nodes.resize(Index + 1);
   }
   Cfg *Func;
   LivenessMode Mode;
-  SizeT NumGlobals;
+  SizeT NumGlobals = 0;
   // Size of Nodes is Cfg::Nodes.size().
   std::vector<LivenessNode> Nodes;
   // VarToLiveMap maps a Variable's Variable::Number to its live index
   // 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