diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
index 8dc0aa3..1b88e5f 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -3519,11 +3519,11 @@
 ///
 /// \param[in] WillMaterializeAll Set to \c true if the caller promises to
 /// materialize everything -- in particular, if this isn't truly lazy.
-static ErrorOr<Module *> getLazyBitcodeModuleImpl(MemoryBuffer *Buffer,
-                                                  LLVMContext &Context,
-                                                  bool WillMaterializeAll) {
+static ErrorOr<Module *>
+getLazyBitcodeModuleImpl(std::unique_ptr<MemoryBuffer> &Buffer,
+                         LLVMContext &Context, bool WillMaterializeAll) {
   Module *M = new Module(Buffer->getBufferIdentifier(), Context);
-  BitcodeReader *R = new BitcodeReader(Buffer, Context);
+  BitcodeReader *R = new BitcodeReader(Buffer.get(), Context);
   M->setMaterializer(R);
 
   auto cleanupOnError = [&](std::error_code EC) {
@@ -3540,11 +3540,13 @@
     if (std::error_code EC = R->materializeForwardReferencedFunctions())
       return cleanupOnError(EC);
 
+  Buffer.release(); // The BitcodeReader owns it now.
   return M;
 }
 
-ErrorOr<Module *> llvm::getLazyBitcodeModule(MemoryBuffer *Buffer,
-                                             LLVMContext &Context) {
+ErrorOr<Module *>
+llvm::getLazyBitcodeModule(std::unique_ptr<MemoryBuffer> &Buffer,
+                           LLVMContext &Context) {
   return getLazyBitcodeModuleImpl(Buffer, Context, false);
 }
 
@@ -3567,11 +3569,9 @@
 ErrorOr<Module *> llvm::parseBitcodeFile(MemoryBufferRef Buffer,
                                          LLVMContext &Context) {
   std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(Buffer, false);
-  ErrorOr<Module *> ModuleOrErr =
-      getLazyBitcodeModuleImpl(Buf.get(), Context, true);
+  ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModuleImpl(Buf, Context, true);
   if (!ModuleOrErr)
     return ModuleOrErr;
-  Buf.release(); // The BitcodeReader owns it now.
   Module *M = ModuleOrErr.get();
   // Read in the entire module, and destroy the BitcodeReader.
   if (std::error_code EC = M->materializeAllPermanently()) {