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

src/IceTranslator.cpp

 //===- subzero/src/IceTranslator.cpp - 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 defines the general driver class for translating ICE to
@@ skipping 35 matching lines @@
     }
     OstreamLocker L(Ctx);
     Ostream &Stream = Ctx->getStrDump();
     Stream << "Warning : Default " << Kind << " prefix '" << Prefix
            << "' potentially conflicts with name '" << Name << "'.\n";
     return true;
   }
   return false;
 }
 
-void Translator::translateFcn(Cfg *Func) {
-  Ctx->cfgQueueBlockingPush(Func);
+void Translator::translateFcn(std::unique_ptr<Cfg> Func) {
+  Ctx->cfgQueueBlockingPush(std::move(Func));
   if (Ctx->getFlags().NumTranslationThreads == 0) {
     Ctx->translateFunctions();
   }
 }
 
 void Translator::emitConstants() {
   if (!getErrorStatus())
     DataLowering->lowerConstants(Ctx);
 }
 
@@ skipping 25 matching lines @@
     for (const Ice::VariableDeclaration *Global : VariableDeclarations) {
       // Interleave dump output w/ emit output.
       if (DumpGlobalVariables)
         Global->dump(getContext(), Stream);
       if (!DisableTranslation &&
           GlobalContext::matchSymbolName(Global->getName(), TranslateOnly))
         DataLowering->lowerGlobal(*Global);
     }
   }
 }