[clang][ARC] Add ARCTargetInfo

Based-on-patch-by: Pete Couperus <petecoup@synopsys.com>

Differential Revision: https://reviews.llvm.org/D53100

llvm-svn: 347699
diff --git a/clang/lib/Basic/Targets/ARC.cpp b/clang/lib/Basic/Targets/ARC.cpp
new file mode 100644
index 0000000..2159ab8
--- /dev/null
+++ b/clang/lib/Basic/Targets/ARC.cpp
@@ -0,0 +1,25 @@
+//===--- ARC.cpp - Implement ARC target feature support -------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements ARC TargetInfo objects.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ARC.h"
+#include "clang/Basic/Builtins.h"
+#include "clang/Basic/MacroBuilder.h"
+#include "clang/Basic/TargetBuiltins.h"
+
+using namespace clang;
+using namespace clang::targets;
+
+void ARCTargetInfo::getTargetDefines(const LangOptions &Opts,
+                                     MacroBuilder &Builder) const {
+  Builder.defineMacro("__arc__");
+}