X86-Darwin: start emitting data-region directives for jump-tables.

The surrounding tools can cope these days, and they were invented for a reason.

llvm-svn: 268437
diff --git a/llvm/lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp b/llvm/lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp
index f5bdd2d..e6fdf57e 100644
--- a/llvm/lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp
+++ b/llvm/lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp
@@ -39,7 +39,7 @@
   cl::desc("Emit R_X86_64_GOTPCRELX instead of R_X86_64_GOTPCREL"));
 
 static cl::opt<bool>
-MarkedJTDataRegions("mark-data-regions", cl::init(false),
+MarkedJTDataRegions("mark-data-regions", cl::init(true),
   cl::desc("Mark code section jump table data regions."),
   cl::Hidden);