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

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 183 matching lines @@
 
 // Wrapper around std::error_code for allowing multiple errors to be
 // folded into one.  The current implementation keeps track of the
 // first error, which is likely to be the most useful one, and this
 // could be extended to e.g. collect a vector of errors.
 class ErrorCode : public std::error_code {
   ErrorCode(const ErrorCode &) = delete;
   ErrorCode &operator=(const ErrorCode &) = delete;
 
 public:
-  ErrorCode() : HasError(false) {}
+  ErrorCode() = default;
   void assign(ErrorCodes Code) {
     if (!HasError) {
       HasError = true;
       std::error_code::assign(Code, std::generic_category());
     }
   }
   void assign(int Code) { assign(static_cast<ErrorCodes>(Code)); }
 
 private:
-  bool HasError;
+  bool HasError = false;
 };
 
 // Reverse range adaptors written in terms of llvm::make_range().
 template <typename T>
 llvm::iterator_range<typename T::const_reverse_iterator>
 reverse_range(const T &Container) {
   return llvm::make_range(Container.rbegin(), Container.rend());
 }
 template <typename T>
 llvm::iterator_range<typename T::reverse_iterator> reverse_range(T &Container) {
   return llvm::make_range(Container.rbegin(), Container.rend());
 }
 
 // Options for pooling and randomization of immediates
 enum RandomizeAndPoolImmediatesEnum { RPI_None, RPI_Randomize, RPI_Pool };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEDEFS_H