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

src/IceClFlagsExtra.h

 //===- subzero/src/IceClFlagsExtra.h - Extra Cl Flags -----------*- 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 command line flags primarily used for non-minimal builds.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICECLFLAGSEXTRA_H
 #define SUBZERO_SRC_ICECLFLAGSEXTRA_H
 
 #include "llvm/IRReader/IRReader.h"
 
 #include "IceDefs.h"
 
 namespace Ice {
 
 class ClFlagsExtra {
   ClFlagsExtra(const ClFlagsExtra &) = delete;
   ClFlagsExtra &operator=(const ClFlagsExtra &) = delete;
 
 public:
-  ClFlagsExtra()
-      : AlwaysExitSuccess(false), BuildOnRead(false), GenerateBuildAtts(false),
-        LLVMVerboseErrors(false), InputFileFormat(llvm::LLVMFormat) {}
+  ClFlagsExtra() = default;
 
   bool getAlwaysExitSuccess() const { return AlwaysExitSuccess; }
   void setAlwaysExitSuccess(bool NewValue) { AlwaysExitSuccess = NewValue; }
 
   bool getBuildOnRead() const { return BuildOnRead; }
   void setBuildOnRead(bool NewValue) { BuildOnRead = NewValue; }
 
   bool getGenerateBuildAtts() const { return GenerateBuildAtts; }
   void setGenerateBuildAtts(bool NewValue) { GenerateBuildAtts = NewValue; }
 
@@ skipping 13 matching lines @@
 
   const IceString &getLogFilename() const { return LogFilename; }
   void setLogFilename(const IceString &NewValue) { LogFilename = NewValue; }
 
   const IceString &getOutputFilename() const { return OutputFilename; }
   void setOutputFilename(const IceString &NewValue) {
     OutputFilename = NewValue;
   }
 
 private:
-  bool AlwaysExitSuccess;
-  bool BuildOnRead;
-  bool GenerateBuildAtts;
-  bool LLVMVerboseErrors;
+  bool AlwaysExitSuccess = false;
+  bool BuildOnRead = false;
+  bool GenerateBuildAtts = false;
+  bool LLVMVerboseErrors = false;
 
-  llvm::NaClFileFormat InputFileFormat;
+  llvm::NaClFileFormat InputFileFormat = llvm::LLVMFormat;
 
-  IceString AppName;
-  IceString IRFilename;
-  IceString LogFilename;
-  IceString OutputFilename;
+  IceString AppName = "";
+  IceString IRFilename = "";
+  IceString LogFilename = "";
+  IceString OutputFilename = "";
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICECLFLAGSEXTRA_H