MC: Separate creating a generic object writer from creating a target object writer. NFCI.

With this we gain a little flexibility in how the generic object
writer is created.

Part of PR37466.

Differential Revision: https://reviews.llvm.org/D47045

llvm-svn: 332868

3 files changed, 8 insertions, 10 deletions

diff --git a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCAsmBackend.cpp b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCAsmBackend.cpp
index 321f49f596e..96e38a6db9e 100644
--- a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCAsmBackend.cpp
+++ b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCAsmBackend.cpp
@@ -67,9 +67,9 @@ public:
     llvm_unreachable("SystemZ does do not have assembler relaxation");
   }
   bool writeNopData(raw_ostream &OS, uint64_t Count) const override;
-  std::unique_ptr<MCObjectWriter>
-  createObjectWriter(raw_pwrite_stream &OS) const override {
-    return createSystemZObjectWriter(OS, OSABI);
+  std::unique_ptr<MCObjectTargetWriter>
+  createObjectTargetWriter() const override {
+    return createSystemZObjectWriter(OSABI);
   }
 };
 } // end anonymous namespace
diff --git a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCObjectWriter.cpp b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCObjectWriter.cpp
index 238926d6c8e..888be519fb1 100644
--- a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCObjectWriter.cpp
+++ b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCObjectWriter.cpp
@@ -161,8 +161,7 @@ unsigned SystemZObjectWriter::getRelocType(MCContext &Ctx,
   }
 }
 
-std::unique_ptr<MCObjectWriter>
-llvm::createSystemZObjectWriter(raw_pwrite_stream &OS, uint8_t OSABI) {
-  return createELFObjectWriter(llvm::make_unique<SystemZObjectWriter>(OSABI),
-                               OS, /*IsLittleEndian=*/false);
+std::unique_ptr<MCObjectTargetWriter>
+llvm::createSystemZObjectWriter(uint8_t OSABI) {
+  return llvm::make_unique<SystemZObjectWriter>(OSABI);
 }
diff --git a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.h b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.h
index ed1b1b95b8f..1617a807e65 100644
--- a/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.h
+++ b/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.h
@@ -20,7 +20,7 @@ class MCAsmBackend;
 class MCCodeEmitter;
 class MCContext;
 class MCInstrInfo;
-class MCObjectWriter;
+class MCObjectTargetWriter;
 class MCRegisterInfo;
 class MCSubtargetInfo;
 class MCTargetOptions;
@@ -93,8 +93,7 @@ MCAsmBackend *createSystemZMCAsmBackend(const Target &T,
                                         const MCRegisterInfo &MRI,
                                         const MCTargetOptions &Options);
 
-std::unique_ptr<MCObjectWriter> createSystemZObjectWriter(raw_pwrite_stream &OS,
-                                                          uint8_t OSABI);
+std::unique_ptr<MCObjectTargetWriter> createSystemZObjectWriter(uint8_t OSABI);
 } // end namespace llvm
 
 // Defines symbolic names for SystemZ registers.