Use std::unique_ptr to simplify memory management a bit.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215559 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Frontend/ASTUnit.h b/include/clang/Frontend/ASTUnit.h
index d31be7e5cb1537245cfc86345fd693f7a5df289a..c350261ea23396c36f51a99521b957c96bd9faac 100644 (file)
--- a/include/clang/Frontend/ASTUnit.h
+++ b/include/clang/Frontend/ASTUnit.h
@@ -272,12 +272,12 @@ private:
   /// \brief When non-NULL, this is the buffer used to store the contents of
   /// the main file when it has been padded for use with the precompiled
   /// preamble.
-  llvm::MemoryBuffer *SavedMainFileBuffer;
+  std::unique_ptr<llvm::MemoryBuffer> SavedMainFileBuffer;
 
   /// \brief When non-NULL, this is the buffer used to store the
   /// contents of the preamble when it has been padded to build the
   /// precompiled preamble.
-  llvm::MemoryBuffer *PreambleBuffer;
+  std::unique_ptr<llvm::MemoryBuffer >PreambleBuffer;
 
   /// \brief The number of warnings that occurred while parsing the preamble.
   ///

diff --git a/lib/Frontend/ASTUnit.cpp b/lib/Frontend/ASTUnit.cpp
index a29edc0e3e9aa943502a1594dfca6c5dd792f209..bc8d268f48e4e9c42a8c345a4d2cfcde2e2106e5 100644 (file)
--- a/lib/Frontend/ASTUnit.cpp
+++ b/lib/Frontend/ASTUnit.cpp
@@ -220,7 +220,7 @@ ASTUnit::ASTUnit(bool _MainFileIsAST)
     OwnsRemappedFileBuffers(true),
     NumStoredDiagnosticsFromDriver(0),
     PreambleRebuildCounter(0), SavedMainFileBuffer(nullptr),
-    PreambleBuffer(nullptr), NumWarningsInPreamble(0),
+    NumWarningsInPreamble(0),
     ShouldCacheCodeCompletionResults(false),
     IncludeBriefCommentsInCodeCompletion(false), UserFilesAreVolatile(false),
     CompletionCacheTopLevelHashValue(0),
@@ -251,9 +251,6 @@ ASTUnit::~ASTUnit() {
     for (const auto &RB : PPOpts.RemappedFileBuffers)
       delete RB.second;
   }
-  
-  delete SavedMainFileBuffer;
-  delete PreambleBuffer;
 
   ClearCachedCompletionResults();  
   
@@ -1029,8 +1026,7 @@ static void checkAndSanitizeDiags(SmallVectorImpl<StoredDiagnostic> &
 /// \returns True if a failure occurred that causes the ASTUnit not to
 /// contain any translation-unit information, false otherwise.
 bool ASTUnit::Parse(llvm::MemoryBuffer *OverrideMainBuffer) {
-  delete SavedMainFileBuffer;
-  SavedMainFileBuffer = nullptr;
+  SavedMainFileBuffer.reset(nullptr);
 
   if (!Invocation) {
     delete OverrideMainBuffer;
@@ -1127,7 +1123,7 @@ bool ASTUnit::Parse(llvm::MemoryBuffer *OverrideMainBuffer) {
     checkAndSanitizeDiags(StoredDiagnostics, getSourceManager());
 
     // Keep track of the override buffer;
-    SavedMainFileBuffer = OverrideMainBuffer;
+    SavedMainFileBuffer.reset(OverrideMainBuffer);
   }
 
   std::unique_ptr<TopLevelDeclTrackerAction> Act(
@@ -1514,14 +1510,12 @@ llvm::MemoryBuffer *ASTUnit::getMainBufferWithPrecompiledPreamble(
                                                   + NewPreamble.second.first);
   PreambleEndsAtStartOfLine = NewPreamble.second.second;
 
-  delete PreambleBuffer;
-  PreambleBuffer
-    = llvm::MemoryBuffer::getMemBufferCopy(
-        NewPreamble.first->getBuffer().slice(0, Preamble.size()), MainFilename);
+  PreambleBuffer.reset(llvm::MemoryBuffer::getMemBufferCopy(
+      NewPreamble.first->getBuffer().slice(0, Preamble.size()), MainFilename));
 
   // Remap the main source file to the preamble buffer.
   StringRef MainFilePath = FrontendOpts.Inputs[0].getFile();
-  PreprocessorOpts.addRemappedFile(MainFilePath, PreambleBuffer);
+  PreprocessorOpts.addRemappedFile(MainFilePath, PreambleBuffer.get());
 
   // Tell the compiler invocation to generate a temporary precompiled header.
   FrontendOpts.ProgramAction = frontend::GeneratePCH;