Stub out explicit MCELFObjectTargetWriter interface.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122067 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/MC/MCELFObjectWriter.h

@@ -14,11 +14,21 @@
 #include "llvm/Support/DataTypes.h"
 
 namespace llvm {
+class MCELFObjectTargetWriter {
+protected:
+  MCELFObjectTargetWriter();
+
+public:
+  virtual ~MCELFObjectTargetWriter();
+};
+
 /// \brief Construct a new ELF writer instance.
 ///
+/// \param MOTW - The target specific ELF writer subclass.
 /// \param OS - The stream to write to.
 /// \returns The constructed object writer.
-MCObjectWriter *createELFObjectWriter(raw_ostream &OS, bool is64Bit,
+MCObjectWriter *createELFObjectWriter(MCELFObjectTargetWriter *MOTW,
+                                      raw_ostream &OS, bool is64Bit,
                                       Triple::OSType OSType, uint16_t EMachine,
                                       bool IsLittleEndian,
                                       bool HasRelocationAddend);

lib/MC/CMakeLists.txt

@@ -8,6 +8,7 @@ add_llvm_library(LLVMMC
   MCCodeEmitter.cpp
   MCContext.cpp
   MCDisassembler.cpp
+  MCELFObjectTargetWriter.cpp
   MCELFStreamer.cpp
   MCExpr.cpp
   MCInst.cpp

lib/MC/ELFObjectWriter.cpp

@@ -1467,7 +1467,8 @@ void ELFObjectWriter::WriteObject(MCAssembler &Asm,
   }
 }
 
-MCObjectWriter *llvm::createELFObjectWriter(raw_ostream &OS,
+MCObjectWriter *llvm::createELFObjectWriter(MCELFObjectTargetWriter *MOTW,
+                                            raw_ostream &OS,
                                             bool Is64Bit,
                                             Triple::OSType OSType,
                                             uint16_t EMachine,

lib/MC/MCELFObjectTargetWriter.cpp

@@ -0,0 +1,18 @@
+//===-- MCELFObjectTargetWriter.cpp - ELF Target Writer Subclass ----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCELFObjectWriter.h"
+
+using namespace llvm;
+
+MCELFObjectTargetWriter::MCELFObjectTargetWriter() {
+}
+
+MCELFObjectTargetWriter::~MCELFObjectTargetWriter() {
+}

lib/Target/ARM/ARMAsmBackend.cpp

@@ -37,6 +37,11 @@ public:
                                /*UseAggressiveSymbolFolding=*/true) {}
 };
 
+class ARMELFObjectWriter : public MCELFObjectTargetWriter {
+public:
+  ARMELFObjectWriter() : MCELFObjectTargetWriter() {}
+};
+
 class ARMAsmBackend : public TargetAsmBackend {
   bool isThumbMode;  // Currently emitting Thumb code.
 public:
@@ -348,7 +353,8 @@ public:
                   uint64_t Value) const;
 
   MCObjectWriter *createObjectWriter(raw_ostream &OS) const {
-    return createELFObjectWriter(OS, /*Is64Bit=*/false,
+    return createELFObjectWriter(new ARMELFObjectWriter(), OS,
+                                 /*Is64Bit=*/false,
                                  OSType, ELF::EM_ARM,
                                  /*IsLittleEndian=*/true,
                                  /*HasRelocationAddend=*/false);

lib/Target/MBlaze/MBlazeAsmBackend.cpp

@@ -42,6 +42,11 @@ static unsigned getFixupKindSize(unsigned Kind) {
 
 
 namespace {
+class MBlazeELFObjectWriter : public MCELFObjectTargetWriter {
+public:
+  MBlazeELFObjectWriter() : MCELFObjectTargetWriter() {}
+};
+
 class MBlazeAsmBackend : public TargetAsmBackend {
 public:
   MBlazeAsmBackend(const Target &T)
@@ -117,7 +122,8 @@ public:
                   uint64_t Value) const;
 
   MCObjectWriter *createObjectWriter(raw_ostream &OS) const {
-    return createELFObjectWriter(OS,/*Is64Bit=*/false,
+    return createELFObjectWriter(new MBlazeELFObjectWriter(),
+                                 OS,/*Is64Bit=*/false,
                                  OSType, ELF::EM_MBLAZE,
                                  /*IsLittleEndian=*/false,
                                  /*HasRelocationAddend=*/true);

lib/Target/X86/X86AsmBackend.cpp

@@ -55,6 +55,11 @@ public:
                                /*UseAggressiveSymbolFolding=*/Is64Bit) {}
 };
 
+class X86ELFObjectWriter : public MCELFObjectTargetWriter {
+public:
+  X86ELFObjectWriter() : MCELFObjectTargetWriter() {}
+};
+
 class X86AsmBackend : public TargetAsmBackend {
 public:
   X86AsmBackend(const Target &T)
@@ -310,7 +315,8 @@ public:
     : ELFX86AsmBackend(T, OSType) {}
 
   MCObjectWriter *createObjectWriter(raw_ostream &OS) const {
-    return createELFObjectWriter(OS, /*Is64Bit=*/false,
+    return createELFObjectWriter(new X86ELFObjectWriter(), OS,
+                                 /*Is64Bit=*/false,
                                  OSType, ELF::EM_386,
                                  /*IsLittleEndian=*/true,
                                  /*HasRelocationAddend=*/false);
@@ -323,7 +329,7 @@ public:
     : ELFX86AsmBackend(T, OSType) {}
 
   MCObjectWriter *createObjectWriter(raw_ostream &OS) const {
-    return createELFObjectWriter(OS, /*Is64Bit=*/true,
+    return createELFObjectWriter(new X86ELFObjectWriter(), OS, /*Is64Bit=*/true,
                                  OSType, ELF::EM_X86_64,
                                  /*IsLittleEndian=*/true,
                                  /*HasRelocationAddend=*/true);