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

src/IceGlobalContext.h

 //===- subzero/src/IceGlobalContext.h - Global context defs -----*- 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 aspects of the compilation that persist across
@@ skipping 121 matching lines @@
     }
   };
 
   // ThreadContext contains thread-local data.  This data can be
   // combined/reduced as needed after all threads complete.
   class ThreadContext {
     ThreadContext(const ThreadContext &) = delete;
     ThreadContext &operator=(const ThreadContext &) = delete;
 
   public:
-    ThreadContext() {}
+    ThreadContext() = default;
     CodeStats StatsFunction;
     CodeStats StatsCumulative;
     TimerList Timers;
   };
 
 public:
   // The dump stream is a log stream while emit is the stream code
   // is emitted to. The error stream is strictly for logging errors.
   GlobalContext(Ostream *OsDump, Ostream *OsEmit, Ostream *OsError,
                 ELFStreamer *ELFStreamer, const ClFlags &Flags);
@@ skipping 306 matching lines @@
   std::unique_ptr<ELFObjectWriter> ObjectWriter;
   BoundedProducerConsumerQueue<Cfg> OptQ;
   BoundedProducerConsumerQueue<EmitterWorkItem> EmitQ;
   // DataLowering is only ever used by a single thread at a time (either in
   // emitItems(), or in IceCompiler::run before the compilation is over.)
   // TODO(jpp): move to EmitterContext.
   std::unique_ptr<TargetDataLowering> DataLowering;
   // If !HasEmittedCode, SubZero will accumulate all Globals (which are "true"
   // program global variables) until the first code WorkItem is seen.
   // TODO(jpp): move to EmitterContext.
-  bool HasSeenCode;
+  bool HasSeenCode = false;
   // TODO(jpp): move to EmitterContext.
   VariableDeclarationList Globals;
   // TODO(jpp): move to EmitterContext.
   std::unique_ptr<VariableDeclaration> ProfileBlockInfoVarDecl;
 
   LockedPtr<ArenaAllocator<>> getAllocator() {
     return LockedPtr<ArenaAllocator<>>(&Allocator, &AllocLock);
   }
   LockedPtr<ConstantPool> getConstPool() {
     return LockedPtr<ConstantPool>(ConstPool.get(), &ConstPoolLock);
@@ skipping 25 matching lines @@
   // AllThreadContexts.
   ICE_TLS_DECLARE_FIELD(ThreadContext *, TLS);
 
   // Private helpers for mangleName()
   typedef llvm::SmallVector<char, 32> ManglerVector;
   void incrementSubstitutions(ManglerVector &OldName) const;
 
   // Randomization Cookie
   // Managed by getRandomizationCookie()
   GlobalLockType RandomizationCookieLock;
-  uint32_t RandomizationCookie;
+  uint32_t RandomizationCookie = 0;
 
 public:
   static void TlsInit() { ICE_TLS_INIT_FIELD(TLS); }
 };
 
 // Helper class to push and pop a timer marker.  The constructor
 // pushes a marker, and the destructor pops it.  This is for
 // convenient timing of regions of code.
 class TimerMarker {
   TimerMarker() = delete;
   TimerMarker(const TimerMarker &) = delete;
   TimerMarker &operator=(const TimerMarker &) = delete;
 
 public:
   TimerMarker(TimerIdT ID, GlobalContext *Ctx,
               TimerStackIdT StackID = GlobalContext::TSK_Default)
-      : ID(ID), Ctx(Ctx), StackID(StackID), Active(false) {
+      : ID(ID), Ctx(Ctx), StackID(StackID) {
     if (ALLOW_DUMP)
       push();
   }
   TimerMarker(TimerIdT ID, const Cfg *Func,
               TimerStackIdT StackID = GlobalContext::TSK_Default)
-      : ID(ID), Ctx(nullptr), StackID(StackID), Active(false) {
+      : ID(ID), Ctx(nullptr), StackID(StackID) {
     // Ctx gets set at the beginning of pushCfg().
     if (ALLOW_DUMP)
       pushCfg(Func);
   }
 
   ~TimerMarker() {
     if (ALLOW_DUMP && Active)
       Ctx->popTimer(ID, StackID);
   }
 
 private:
   void push();
   void pushCfg(const Cfg *Func);
   const TimerIdT ID;
   GlobalContext *Ctx;
   const TimerStackIdT StackID;
-  bool Active;
+  bool Active = false;
 };
 
 // Helper class for locking the streams and then automatically
 // unlocking them.
 class OstreamLocker {
 private:
   OstreamLocker() = delete;
   OstreamLocker(const OstreamLocker &) = delete;
   OstreamLocker &operator=(const OstreamLocker &) = delete;
 
 public:
   explicit OstreamLocker(GlobalContext *Ctx) : Ctx(Ctx) { Ctx->lockStr(); }
   ~OstreamLocker() { Ctx->unlockStr(); }
 
 private:
   GlobalContext *const Ctx;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEGLOBALCONTEXT_H