Return a std::uinque_ptr. Every caller was already using one.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215858 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/LTO/LTOModule.h

@@ -71,8 +71,8 @@ public:
                                  StringRef triplePrefix);
 
   /// Create a MemoryBuffer from a memory range with an optional name.
-  static MemoryBuffer *makeBuffer(const void *mem, size_t length,
-                                  StringRef name = "");
+  static std::unique_ptr<MemoryBuffer>
+  makeBuffer(const void *mem, size_t length, StringRef name = "");
 
   /// Create an LTOModule. N.B. These methods take ownership of the buffer. The
   /// caller must have initialized the Targets, the TargetMCs, the AsmPrinters,

lib/LTO/LTOModule.cpp

@@ -165,10 +165,11 @@ LTOModule *LTOModule::makeLTOModule(std::unique_ptr<MemoryBuffer> Buffer,
 }
 
 /// Create a MemoryBuffer from a memory range with an optional name.
-MemoryBuffer *LTOModule::makeBuffer(const void *mem, size_t length,
-                                    StringRef name) {
+std::unique_ptr<MemoryBuffer>
+LTOModule::makeBuffer(const void *mem, size_t length, StringRef name) {
   const char *startPtr = (const char*)mem;
-  return MemoryBuffer::getMemBuffer(StringRef(startPtr, length), name, false);
+  return std::unique_ptr<MemoryBuffer>(
+      MemoryBuffer::getMemBuffer(StringRef(startPtr, length), name, false));
 }
 
 /// objcClassNameFromExpression - Get string that the data pointer points to.