Implements far-branches on ARM.

runtime/vm/assembler.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ASSEMBLER_H_
 #define VM_ASSEMBLER_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/globals.h"
 #include "vm/growable_array.h"
 #include "vm/object.h"
 
 namespace dart {
 
+// TODO(zra): Remove once far branches are enabled automatically on a
+// per-function basis.
+#if defined(TARGET_ARCH_ARM) || defined(TARGET_ARCH_MIPS)
+DECLARE_FLAG(bool, use_far_branches);
+#endif
+
 // Forward declarations.
 class Assembler;
 class AssemblerFixup;
 class AssemblerBuffer;
 class MemoryRegion;
 
 
 // External labels keep a function pointer to allow them
 // to be called from code generated by the assembler.
 class ExternalLabel : public ValueObject {
@@ skipping 179 matching lines @@
 #include "vm/assembler_x64.h"
 #elif defined(TARGET_ARCH_ARM)
 #include "vm/assembler_arm.h"
 #elif defined(TARGET_ARCH_MIPS)
 #include "vm/assembler_mips.h"
 #else
 #error Unknown architecture.
 #endif
 
 #endif  // VM_ASSEMBLER_H_