ARMAsmBackend uses a factory method to generate binary file format specific

objects.  There were a few FIXMEs in ARMAsmBackend.cpp suggesting the class
definitions should be in a separate file.  Starting with ARMAsmBackend, the
class definition has been put in a header file, and #includes reduced.  Each
sub-type of ARMAsmBackend is now in its own header file.

Derived types have been painted with a different color of bike-shed:

  s/DarwinARMAsmBackend/ARMAsmBackendDarwin/g
  s/ARMWinCOFFAsmBackend/ARMAsmBackendWinCOFF/g
  s/ELFARMAsmBackend/ARMAsmBackendELF/g

Finally, clang-format has been run across ARMAsmBackend.cpp

llvm-svn: 217866

1 files changed, 33 insertions, 0 deletions

diff --git a/llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackendDarwin.h b/llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackendDarwin.h
new file mode 100644
index 00000000000..3bd7ab73839
--- /dev/null
+++ b/llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackendDarwin.h
@@ -0,0 +1,33 @@
+//===-- ARMAsmBackendDarwin.h   ARM Asm Backend Darwin ----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_ARM_ARMASMBACKENDDARWIN_H
+#define LLVM_LIB_TARGET_ARM_ARMASMBACKENDDARWIN_H
+
+#include "llvm/Support/MachO.h"
+
+using namespace llvm;
+
+namespace {
+class ARMAsmBackendDarwin : public ARMAsmBackend {
+public:
+  const MachO::CPUSubTypeARM Subtype;
+  ARMAsmBackendDarwin(const Target &T, StringRef TT, MachO::CPUSubTypeARM st)
+      : ARMAsmBackend(T, TT, /* IsLittleEndian */ true), Subtype(st) {
+    HasDataInCodeSupport = true;
+  }
+
+  MCObjectWriter *createObjectWriter(raw_ostream &OS) const override {
+    return createARMMachObjectWriter(OS, /*Is64Bit=*/false, MachO::CPU_TYPE_ARM,
+                                     Subtype);
+  }
+};
+}
+
+#endif