diff --git a/lib/Analysis/LiveVar/FunctionLiveVarInfo.cpp b/lib/Analysis/LiveVar/FunctionLiveVarInfo.cpp
index 295a9ed5e5e..edf68868d47 100644
--- a/lib/Analysis/LiveVar/FunctionLiveVarInfo.cpp
+++ b/lib/Analysis/LiveVar/FunctionLiveVarInfo.cpp
@@ -15,7 +15,7 @@
 
 AnalysisID FunctionLiveVarInfo::ID(AnalysisID::create<FunctionLiveVarInfo>());
 
-cl::Enum<LiveVarDebugLevel_t> DEBUG_LV("dlivevar", cl::NoFlags,
+cl::Enum<LiveVarDebugLevel_t> DEBUG_LV("dlivevar", cl::Hidden,
   "enable live-variable debugging information",
   clEnumValN(LV_DEBUG_None   , "n", "disable debug output"),
   clEnumValN(LV_DEBUG_Normal , "y", "enable debug output"),
diff --git a/lib/CodeGen/InstrSched/InstrScheduling.cpp b/lib/CodeGen/InstrSched/InstrScheduling.cpp
index d219ef6b6df..0a6d1ce3539 100644
--- a/lib/CodeGen/InstrSched/InstrScheduling.cpp
+++ b/lib/CodeGen/InstrSched/InstrScheduling.cpp
@@ -19,7 +19,7 @@ using std::vector;
 
 //************************* External Data Types *****************************/
 
-cl::Enum<enum SchedDebugLevel_t> SchedDebugLevel("dsched", cl::NoFlags,
+cl::Enum<enum SchedDebugLevel_t> SchedDebugLevel("dsched", cl::Hidden,
   "enable instruction scheduling debugging information",
   clEnumValN(Sched_NoDebugInfo,      "n", "disable debug output"),
   clEnumValN(Sched_Disable,        "off", "disable instruction scheduling"),
diff --git a/lib/CodeGen/InstrSelection/InstrSelection.cpp b/lib/CodeGen/InstrSelection/InstrSelection.cpp
index 0776b159747..614c5f67731 100644
--- a/lib/CodeGen/InstrSelection/InstrSelection.cpp
+++ b/lib/CodeGen/InstrSelection/InstrSelection.cpp
@@ -39,7 +39,7 @@ enum SelectDebugLevel_t {
 };
 
 // Enable Debug Options to be specified on the command line
-cl::Enum<enum SelectDebugLevel_t> SelectDebugLevel("dselect", cl::NoFlags,
+cl::Enum<enum SelectDebugLevel_t> SelectDebugLevel("dselect", cl::Hidden,
    "enable instruction selection debugging information",
    clEnumValN(Select_NoDebugInfo,      "n", "disable debug output"),
    clEnumValN(Select_PrintMachineCode, "y", "print generated machine code"),
diff --git a/lib/CodeGen/RegAlloc/PhyRegAlloc.cpp b/lib/CodeGen/RegAlloc/PhyRegAlloc.cpp
index 785a12411a1..ab9b1a7b176 100644
--- a/lib/CodeGen/RegAlloc/PhyRegAlloc.cpp
+++ b/lib/CodeGen/RegAlloc/PhyRegAlloc.cpp
@@ -32,7 +32,7 @@ using std::cerr;
 // ***TODO: There are several places we add instructions. Validate the order
 //          of adding these instructions.
 
-cl::Enum<RegAllocDebugLevel_t> DEBUG_RA("dregalloc", cl::NoFlags,
+cl::Enum<RegAllocDebugLevel_t> DEBUG_RA("dregalloc", cl::Hidden,
   "enable register allocation debugging information",
   clEnumValN(RA_DEBUG_None   , "n", "disable debug output"),
   clEnumValN(RA_DEBUG_Normal , "y", "enable debug output"),