Remove BitcodeReader::setBufferOwned.

We do have use cases for the bitcode reader owning the buffer or not, but we
always know which one we have when we construct it.

It might be possible to simplify this further, but this is a step in the
right direction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211205 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/Bitcode/ReaderWriter.h b/include/llvm/Bitcode/ReaderWriter.h
index 4c194a638d4a6760e6a6b5a7746a54c8655f16bc..0d0d6a71ab141c7ecbbaa544f375a796f77fb769 100644 (file)
--- a/include/llvm/Bitcode/ReaderWriter.h
+++ b/include/llvm/Bitcode/ReaderWriter.h
@@ -30,7 +30,8 @@ namespace llvm {
   /// deserialization of function bodies.  If successful, this takes ownership
   /// of 'buffer. On error, this *does not* take ownership of Buffer.
   ErrorOr<Module *> getLazyBitcodeModule(MemoryBuffer *Buffer,
-                                         LLVMContext &Context);
+                                         LLVMContext &Context,
+                                         bool BufferOwned = true);
 
   /// getStreamedBitcodeModule - Read the header of the specified stream
   /// and prepare for lazy deserialization and streaming of function bodies.

diff --git a/lib/Bitcode/Reader/BitcodeReader.cpp b/lib/Bitcode/Reader/BitcodeReader.cpp
index c13eba78c2ad005ee297141ce1dbc55b9d1b1feb..04fc18ec21f06d039148aafb0dc5c07a78a83823 100644 (file)
--- a/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -3374,16 +3374,15 @@ const std::error_category &BitcodeReader::BitcodeErrorCategory() {
 /// getLazyBitcodeModule - lazy function-at-a-time loading from a file.
 ///
 ErrorOr<Module *> llvm::getLazyBitcodeModule(MemoryBuffer *Buffer,
-                                             LLVMContext &Context) {
+                                             LLVMContext &Context,
+                                             bool BufferOwned) {
   Module *M = new Module(Buffer->getBufferIdentifier(), Context);
-  BitcodeReader *R = new BitcodeReader(Buffer, Context);
+  BitcodeReader *R = new BitcodeReader(Buffer, Context, BufferOwned);
   M->setMaterializer(R);
   if (std::error_code EC = R->ParseBitcodeInto(M)) {
     delete M;  // Also deletes R.
     return EC;
   }
-  // Have the BitcodeReader dtor delete 'Buffer'.
-  R->setBufferOwned(true);
 
   R->materializeForwardReferencedFunctions();
 
@@ -3404,21 +3403,16 @@ Module *llvm::getStreamedBitcodeModule(const std::string &name,
     delete M;  // Also deletes R.
     return nullptr;
   }
-  R->setBufferOwned(false); // no buffer to delete
   return M;
 }
 
 ErrorOr<Module *> llvm::parseBitcodeFile(MemoryBuffer *Buffer,
                                          LLVMContext &Context) {
-  ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModule(Buffer, Context);
+  ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModule(Buffer, Context, false);
   if (!ModuleOrErr)
     return ModuleOrErr;
   Module *M = ModuleOrErr.get();
 
-  // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
-  // there was an error.
-  static_cast<BitcodeReader*>(M->getMaterializer())->setBufferOwned(false);
-
   // Read in the entire module, and destroy the BitcodeReader.
   if (std::error_code EC = M->materializeAllPermanently()) {
     delete M;
@@ -3434,9 +3428,7 @@ ErrorOr<Module *> llvm::parseBitcodeFile(MemoryBuffer *Buffer,
 std::string llvm::getBitcodeTargetTriple(MemoryBuffer *Buffer,
                                          LLVMContext& Context,
                                          std::string *ErrMsg) {
-  BitcodeReader *R = new BitcodeReader(Buffer, Context);
-  // Don't let the BitcodeReader dtor delete 'Buffer'.
-  R->setBufferOwned(false);
+  BitcodeReader *R = new BitcodeReader(Buffer, Context, /*BufferOwned*/ false);
 
   std::string Triple("");
   if (std::error_code EC = R->ParseTriple(Triple))

diff --git a/lib/Bitcode/Reader/BitcodeReader.h b/lib/Bitcode/Reader/BitcodeReader.h
index cb0ce3228263061808779f49caded36882fbb191..51a8c6a111307d791cbe89e96f6d0474bb130c2f 100644 (file)
--- a/lib/Bitcode/Reader/BitcodeReader.h
+++ b/lib/Bitcode/Reader/BitcodeReader.h
@@ -223,11 +223,11 @@ public:
     return std::error_code(E, BitcodeErrorCategory());
   }
 
-  explicit BitcodeReader(MemoryBuffer *buffer, LLVMContext &C)
-      : Context(C), TheModule(nullptr), Buffer(buffer), BufferOwned(false),
-        LazyStreamer(nullptr), NextUnreadBit(0), SeenValueSymbolTable(false),
-        ValueList(C), MDValueList(C), SeenFirstFunctionBody(false),
-        UseRelativeIDs(false) {}
+  explicit BitcodeReader(MemoryBuffer *buffer, LLVMContext &C, bool BufferOwned)
+      : Context(C), TheModule(nullptr), Buffer(buffer),
+        BufferOwned(BufferOwned), LazyStreamer(nullptr), NextUnreadBit(0),
+        SeenValueSymbolTable(false), ValueList(C), MDValueList(C),
+        SeenFirstFunctionBody(false), UseRelativeIDs(false) {}
   explicit BitcodeReader(DataStreamer *streamer, LLVMContext &C)
       : Context(C), TheModule(nullptr), Buffer(nullptr), BufferOwned(false),
         LazyStreamer(streamer), NextUnreadBit(0), SeenValueSymbolTable(false),
@@ -239,10 +239,6 @@ public:
 
   void FreeState();
 
-  /// setBufferOwned - If this is true, the reader will destroy the MemoryBuffer
-  /// when the reader is destroyed.
-  void setBufferOwned(bool Owned) { BufferOwned = Owned; }
-
   bool isMaterializable(const GlobalValue *GV) const override;
   bool isDematerializable(const GlobalValue *GV) const override;
   std::error_code Materialize(GlobalValue *GV) override;