Use std::unique_ptr in a few methods that take ownership.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215864 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/ARCMigrate/FileRemapper.h

@@ -52,14 +52,14 @@ public:
   bool overwriteOriginal(DiagnosticsEngine &Diag,
                          StringRef outputDir = StringRef());
 
-  void remap(StringRef filePath, llvm::MemoryBuffer *memBuf);
+  void remap(StringRef filePath, std::unique_ptr<llvm::MemoryBuffer> memBuf);
 
   void applyMappings(PreprocessorOptions &PPOpts) const;
 
   void clear(StringRef outputDir = StringRef());
 
 private:
-  void remap(const FileEntry *file, llvm::MemoryBuffer *memBuf);
+  void remap(const FileEntry *file, std::unique_ptr<llvm::MemoryBuffer> memBuf);
   void remap(const FileEntry *file, const FileEntry *newfile);
 
   const FileEntry *getOriginalFile(StringRef filePath);

lib/ARCMigrate/ARCMT.cpp

@@ -597,11 +597,12 @@ bool MigrationProcess::applyTransform(TransformFn trans,
     llvm::raw_svector_ostream vecOS(newText);
     buf.write(vecOS);
     vecOS.flush();
-    llvm::MemoryBuffer *memBuf = llvm::MemoryBuffer::getMemBufferCopy(
-                   StringRef(newText.data(), newText.size()), newFname);
+    std::unique_ptr<llvm::MemoryBuffer> memBuf(
+        llvm::MemoryBuffer::getMemBufferCopy(
+            StringRef(newText.data(), newText.size()), newFname));
     SmallString<64> filePath(file->getName());
     Unit->getFileManager().FixupRelativePath(filePath);
-    Remapper.remap(filePath.str(), memBuf);
+    Remapper.remap(filePath.str(), std::move(memBuf));
   }
 
   return false;

lib/ARCMigrate/FileRemapper.cpp

@@ -207,15 +207,17 @@ void FileRemapper::applyMappings(PreprocessorOptions &PPOpts) const {
   PPOpts.RetainRemappedFileBuffers = true;
 }
 
-void FileRemapper::remap(StringRef filePath, llvm::MemoryBuffer *memBuf) {
-  remap(getOriginalFile(filePath), memBuf);
+void FileRemapper::remap(StringRef filePath,
+                         std::unique_ptr<llvm::MemoryBuffer> memBuf) {
+  remap(getOriginalFile(filePath), std::move(memBuf));
 }
 
-void FileRemapper::remap(const FileEntry *file, llvm::MemoryBuffer *memBuf) {
+void FileRemapper::remap(const FileEntry *file,
+                         std::unique_ptr<llvm::MemoryBuffer> memBuf) {
   assert(file);
   Target &targ = FromToMappings[file];
   resetTarget(targ);
-  targ = memBuf;
+  targ = memBuf.release();
 }
 
 void FileRemapper::remap(const FileEntry *file, const FileEntry *newfile) {

lib/ARCMigrate/ObjCMT.cpp

@@ -1821,11 +1821,12 @@ void ObjCMigrateASTConsumer::HandleTranslationUnit(ASTContext &Ctx) {
     llvm::raw_svector_ostream vecOS(newText);
     buf.write(vecOS);
     vecOS.flush();
-    llvm::MemoryBuffer *memBuf = llvm::MemoryBuffer::getMemBufferCopy(
-                   StringRef(newText.data(), newText.size()), file->getName());
+    std::unique_ptr<llvm::MemoryBuffer> memBuf(
+        llvm::MemoryBuffer::getMemBufferCopy(
+            StringRef(newText.data(), newText.size()), file->getName()));
     SmallString<64> filePath(file->getName());
     FileMgr.FixupRelativePath(filePath);
-    Remapper.remap(filePath.str(), memBuf);
+    Remapper.remap(filePath.str(), std::move(memBuf));
   }
 
   if (IsOutputFile) {