Subzero: Manage each Cfg as a std::unique_ptr<Cfg>.

src/IceTranslator.h

 //===- subzero/src/IceTranslator.h - ICE to machine code --------*- 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 general driver class for translating ICE to
@@ skipping 27 matching lines @@
 
   ~Translator();
   const ErrorCode &getErrorStatus() const { return ErrorStatus; }
 
   GlobalContext *getContext() const { return Ctx; }
 
   const ClFlags &getFlags() const { return Flags; }
 
   /// Translates the constructed ICE function Fcn to machine code.
   /// Takes ownership of Func.
-  void translateFcn(Cfg *Func);
+  void translateFcn(std::unique_ptr<Cfg> Func);
 
   /// Emits the constant pool.
   void emitConstants();
 
   /// If there was an error during bitcode reading/parsing, copy the
   /// error code into the GlobalContext.
   void transferErrorCode() const;
 
   /// Lowers the given list of global addresses to target. Generates
   /// list of corresponding variable declarations.
@@ skipping 12 matching lines @@
   GlobalContext *Ctx;
   const ClFlags &Flags;
   std::unique_ptr<TargetDataLowering> DataLowering;
   // Exit status of the translation. False is successful. True otherwise.
   ErrorCode ErrorStatus;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETRANSLATOR_H