[MC] Have MCObjectStreamer take its MCAsmBackend argument via unique_ptr.

MCObjectStreamer owns its MCAsmBackend -- this fixes the types to reflect that,
and allows us to remove another instance of MCObjectStreamer's weird "holding
ownership via someone else's reference" trick.

llvm-svn: 315410

1 files changed, 3 insertions, 2 deletions

diff --git a/llvm/lib/Target/Lanai/MCTargetDesc/LanaiMCTargetDesc.cpp b/llvm/lib/Target/Lanai/MCTargetDesc/LanaiMCTargetDesc.cpp
index bcbde2b8b79..a491efc322c 100644
--- a/llvm/lib/Target/Lanai/MCTargetDesc/LanaiMCTargetDesc.cpp
+++ b/llvm/lib/Target/Lanai/MCTargetDesc/LanaiMCTargetDesc.cpp
@@ -60,12 +60,13 @@ createLanaiMCSubtargetInfo(const Triple &TT, StringRef CPU, StringRef FS) {
 }
 
 static MCStreamer *createMCStreamer(const Triple &T, MCContext &Context,
-                                    MCAsmBackend &MAB, raw_pwrite_stream &OS,
+                                    std::unique_ptr<MCAsmBackend> &&MAB,
+                                    raw_pwrite_stream &OS,
                                     MCCodeEmitter *Emitter, bool RelaxAll) {
   if (!T.isOSBinFormatELF())
     llvm_unreachable("OS not supported");
 
-  return createELFStreamer(Context, MAB, OS, Emitter, RelaxAll);
+  return createELFStreamer(Context, std::move(MAB), OS, Emitter, RelaxAll);
 }
 
 static MCInstPrinter *createLanaiMCInstPrinter(const Triple & /*T*/,