Index: include/llvm/Option/Arg.h
===================================================================
--- include/llvm/Option/Arg.h
+++ include/llvm/Option/Arg.h
@@ -113,6 +113,7 @@
   /// when rendered as a input (e.g., Xlinker).
   void renderAsInput(const ArgList &Args, ArgStringList &Output) const;
 
+  void print(raw_ostream &O) const;
   void dump() const;
 
   /// \brief Return a formatted version of the argument and
Index: include/llvm/Option/ArgList.h
===================================================================
--- include/llvm/Option/ArgList.h
+++ include/llvm/Option/ArgList.h
@@ -306,6 +306,7 @@
   const char *GetOrMakeJoinedArgString(unsigned Index, StringRef LHS,
                                         StringRef RHS) const;
 
+  void print(raw_ostream &O) const;
   void dump() const;
 
   /// @}
Index: include/llvm/Option/Option.h
===================================================================
--- include/llvm/Option/Option.h
+++ include/llvm/Option/Option.h
@@ -195,6 +195,7 @@
   ///                start.
   Arg *accept(const ArgList &Args, unsigned &Index, unsigned ArgSize) const;
 
+  void print(raw_ostream &O) const;
   void dump() const;
 };
 
Index: lib/Option/Arg.cpp
===================================================================
--- lib/Option/Arg.cpp
+++ lib/Option/Arg.cpp
@@ -13,6 +13,7 @@
 #include "llvm/Option/ArgList.h"
 #include "llvm/Option/Option.h"
 #include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Debug.h"
 
 using namespace llvm;
 using namespace llvm::opt;
@@ -43,23 +44,25 @@
   }
 }
 
-void Arg::dump() const {
-  llvm::errs() << "<";
+void Arg::print(raw_ostream& O) const {
+  O << "<";
 
-  llvm::errs() << " Opt:";
-  Opt.dump();
+  O << " Opt:";
+  Opt.print(O);
 
-  llvm::errs() << " Index:" << Index;
+  O << " Index:" << Index;
 
-  llvm::errs() << " Values: [";
+  O << " Values: [";
   for (unsigned i = 0, e = Values.size(); i != e; ++i) {
-    if (i) llvm::errs() << ", ";
-    llvm::errs() << "'" << Values[i] << "'";
+    if (i) O << ", ";
+    O << "'" << Values[i] << "'";
   }
 
-  llvm::errs() << "]>\n";
+  O << "]>\n";
 }
 
+LLVM_DUMP_METHOD void Arg::dump() const { print(dbgs()); }
+
 std::string Arg::getAsString(const ArgList &Args) const {
   SmallString<256> Res;
   llvm::raw_svector_ostream OS(Res);
Index: lib/Option/ArgList.cpp
===================================================================
--- lib/Option/ArgList.cpp
+++ lib/Option/ArgList.cpp
@@ -13,6 +13,7 @@
 #include "llvm/ADT/Twine.h"
 #include "llvm/Option/Arg.h"
 #include "llvm/Option/Option.h"
+#include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
 
 using namespace llvm;
@@ -328,13 +329,15 @@
   return MakeArgString(LHS + RHS);
 }
 
-LLVM_DUMP_METHOD void ArgList::dump() const {
+void ArgList::print(raw_ostream &O) const {
   for (Arg *A : *this) {
-    llvm::errs() << "* ";
-    A->dump();
+    O << "* ";
+    A->print(O);
   }
 }
 
+LLVM_DUMP_METHOD void ArgList::dump() const { print(dbgs()); }
+
 //
 
 void InputArgList::releaseMemory() {
Index: lib/Option/Option.cpp
===================================================================
--- lib/Option/Option.cpp
+++ lib/Option/Option.cpp
@@ -11,6 +11,7 @@
 #include "llvm/ADT/Twine.h"
 #include "llvm/Option/Arg.h"
 #include "llvm/Option/ArgList.h"
+#include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
@@ -35,10 +36,10 @@
   }
 }
 
-void Option::dump() const {
-  llvm::errs() << "<";
+void Option::print(raw_ostream &O) const {
+  O << "<";
   switch (getKind()) {
-#define P(N) case N: llvm::errs() << #N; break
+#define P(N) case N: O << #N; break
     P(GroupClass);
     P(InputClass);
     P(UnknownClass);
@@ -54,33 +55,35 @@
   }
 
   if (Info->Prefixes) {
-    llvm::errs() << " Prefixes:[";
-    for (const char * const *Pre = Info->Prefixes; *Pre != nullptr; ++Pre) {
-      llvm::errs() << '"' << *Pre << (*(Pre + 1) == nullptr ? "\"" : "\", ");
+    O << " Prefixes:[";
+    for (const char *const *Pre = Info->Prefixes; *Pre != nullptr; ++Pre) {
+      O << '"' << *Pre << (*(Pre + 1) == nullptr ? "\"" : "\", ");
     }
-    llvm::errs() << ']';
+    O << ']';
   }
 
-  llvm::errs() << " Name:\"" << getName() << '"';
+  O << " Name:\"" << getName() << '"';
 
   const Option Group = getGroup();
   if (Group.isValid()) {
-    llvm::errs() << " Group:";
-    Group.dump();
+    O << " Group:";
+    Group.print(O);
   }
 
   const Option Alias = getAlias();
   if (Alias.isValid()) {
-    llvm::errs() << " Alias:";
-    Alias.dump();
+    O << " Alias:";
+    Alias.print(O);
   }
 
   if (getKind() == MultiArgClass)
-    llvm::errs() << " NumArgs:" << getNumArgs();
+    O << " NumArgs:" << getNumArgs();
 
-  llvm::errs() << ">\n";
+  O << ">\n";
 }
 
+void Option::dump() const { print(dbgs()); }
+
 bool Option::matches(OptSpecifier Opt) const {
   // Aliases are never considered in matching, look through them.
   const Option Alias = getAlias();