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

2 files changed, 10 insertions, 22 deletions

diff --git a/lib/Bitcode/Reader/BitcodeReader.cpp b/lib/Bitcode/Reader/BitcodeReader.cpp
index c13eba78c2..04fc18ec21 100644
--- 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 cb0ce32282..51a8c6a111 100644
--- 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;