Remove redundant local variable (use newly created instance data).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@80861 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Frontend/ASTUnit.cpp

@@ -104,15 +104,13 @@ ASTUnit *ASTUnit::LoadFromPCHFile(const std::string &Filename,
   std::string Predefines;
   unsigned Counter;
 
-  llvm::OwningPtr<PCHReader>        Reader;
   llvm::OwningPtr<ExternalASTSource> Source;
 
-  Reader.reset(new PCHReader(SourceMgr, FileMgr, Diags));
-  AST->Reader.reset(Reader.get());
-  Reader->setListener(new PCHInfoCollector(LangInfo, HeaderInfo, TargetTriple,
-                                           Predefines, Counter));
-
-  switch (Reader->ReadPCH(Filename)) {
+  AST->Reader.reset(new PCHReader(SourceMgr, FileMgr, Diags));
+  AST->Reader->setListener(new PCHInfoCollector(LangInfo, HeaderInfo, 
+                                                TargetTriple, Predefines, 
+                                                Counter));
+  switch (AST->Reader->ReadPCH(Filename)) {
   case PCHReader::Success:
     break;
     
@@ -133,7 +131,7 @@ ASTUnit *ASTUnit::LoadFromPCHFile(const std::string &Filename,
 
   PP.setPredefines(Predefines);
   PP.setCounterValue(Counter);
-  Reader->setPreprocessor(PP);
+  AST->Reader->setPreprocessor(PP);
   
   // Create and initialize the ASTContext.
 
@@ -147,12 +145,12 @@ ASTUnit *ASTUnit::LoadFromPCHFile(const std::string &Filename,
                                 /* size_reserve = */0));
   ASTContext &Context = *AST->Ctx.get();
   
-  Reader->InitializeContext(Context);
+  AST->Reader->InitializeContext(Context);
   
   // Attach the PCH reader to the AST context as an external AST
   // source, so that declarations will be deserialized from the
   // PCH file as needed.
-  Source.reset(Reader.take());
+  Source.reset(AST->Reader.get());
   Context.setExternalSource(Source);
 
   return AST.take();