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

src/IceGlobalInits.h

 //===- subzero/src/IceGlobalInits.h - Global declarations -------*- 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 representation of function declarations,
@@ skipping 36 matching lines @@
   bool isInternal() const {
     return Linkage == llvm::GlobalValue::InternalLinkage;
   }
   llvm::GlobalValue::LinkageTypes getLinkage() const { return Linkage; }
   bool isExternal() const {
     return Linkage == llvm::GlobalValue::ExternalLinkage;
   }
   void setLinkage(llvm::GlobalValue::LinkageTypes NewLinkage) {
     Linkage = NewLinkage;
   }
-  virtual ~GlobalDeclaration() {}
+  virtual ~GlobalDeclaration() = default;
 
   /// Prints out type of the global declaration.
   virtual void dumpType(Ostream &Stream) const = 0;
 
   /// Prints out the global declaration.
   virtual void dump(GlobalContext *Ctx, Ostream &Stream) const = 0;
   void dump(Ostream &Stream) const {
     if (!ALLOW_DUMP)
       return;
     GlobalContext *const Ctx = nullptr;
@@ skipping 67 matching lines @@
     Initializer &operator=(const Initializer &) = delete;
 
   public:
     /// Discriminator for LLVM-style RTTI.
     enum InitializerKind {
       DataInitializerKind,
       ZeroInitializerKind,
       RelocInitializerKind
     };
     InitializerKind getKind() const { return Kind; }
-    virtual ~Initializer() {}
+    virtual ~Initializer() = default;
     virtual SizeT getNumBytes() const = 0;
     virtual void dump(GlobalContext *Ctx, Ostream &Stream) const = 0;
     void dump(Ostream &Stream) const {
       if (ALLOW_DUMP)
         dump(nullptr, Stream);
     }
     virtual void dumpType(Ostream &Stream) const;
 
   protected:
     explicit Initializer(InitializerKind Kind) : Kind(Kind) {}
@@ skipping 163 matching lines @@
 template <class StreamType>
 inline StreamType &operator<<(StreamType &Stream,
                               const GlobalDeclaration &Addr) {
   Addr.dump(Stream);
   return Stream;
 }
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEGLOBALINITS_H