[MC] Thread unique_ptr<MCObjectWriter> through the create.*ObjectWriter

functions.

This makes the ownership of the resulting MCObjectWriter clear, and allows us
to remove one instance of MCObjectStreamer's bizarre "holding ownership via
someone else's reference" trick.

llvm-svn: 315327

1 files changed, 3 insertions, 2 deletions

diff --git a/llvm/lib/MC/MachObjectWriter.cpp b/llvm/lib/MC/MachObjectWriter.cpp
index c2196a77e18..7dbb84e166f 100644
--- a/llvm/lib/MC/MachObjectWriter.cpp
+++ b/llvm/lib/MC/MachObjectWriter.cpp
@@ -994,8 +994,9 @@ void MachObjectWriter::writeObject(MCAssembler &Asm,
   }
 }
 
-MCObjectWriter *
+std::unique_ptr<MCObjectWriter>
 llvm::createMachObjectWriter(std::unique_ptr<MCMachObjectTargetWriter> MOTW,
                              raw_pwrite_stream &OS, bool IsLittleEndian) {
-  return new MachObjectWriter(std::move(MOTW), OS, IsLittleEndian);
+  return llvm::make_unique<MachObjectWriter>(std::move(MOTW), OS,
+                                             IsLittleEndian);
 }