Uncomment LLVM_FALLTHROUGH.

llvm-svn: 360798
diff --git a/llvm/lib/Target/ARC/ARCOptAddrMode.cpp b/llvm/lib/Target/ARC/ARCOptAddrMode.cpp
index 49823a8..e1680b4 100644
--- a/llvm/lib/Target/ARC/ARCOptAddrMode.cpp
+++ b/llvm/lib/Target/ARC/ARCOptAddrMode.cpp
@@ -124,7 +124,7 @@
   switch (MI.getOpcode()) {
   case ARC::SUB_rru6:
     Sign = -1;
-    // LLVM_FALLTHROUGH
+    LLVM_FALLTHROUGH;
   case ARC::ADD_rru6:
     assert(MI.getOperand(2).isImm() && "Expected immediate operand");
     Amount = Sign * MI.getOperand(2).getImm();