diff --git a/include/llvm/Support/SystemUtils.h b/include/llvm/Support/SystemUtils.h
index 856bc20b7c7..e323448d5ba 100644
--- a/include/llvm/Support/SystemUtils.h
+++ b/include/llvm/Support/SystemUtils.h
@@ -24,7 +24,10 @@ namespace llvm {
 /// advising against display of bytecode and return true. Otherwise just return
 /// false
 /// @brief Check for output written to a console
-bool CheckBytecodeOutputToConsole(std::ostream* stream_to_check);
+bool CheckBytecodeOutputToConsole(
+  std::ostream* stream_to_check, ///< The stream to be checked
+  bool print_warning = true ///< Control whether warnings are printed
+);
 
 /// FindExecutable - Find a named executable, giving the argv[0] of program
 /// being executed. This allows us to find another LLVM tool if it is built into
diff --git a/lib/Support/SystemUtils.cpp b/lib/Support/SystemUtils.cpp
index dfb87755f7b..764f6be4eb2 100644
--- a/lib/Support/SystemUtils.cpp
+++ b/lib/Support/SystemUtils.cpp
@@ -19,12 +19,15 @@
 
 using namespace llvm;
 
-bool llvm::CheckBytecodeOutputToConsole(std::ostream* stream_to_check) {
+bool llvm::CheckBytecodeOutputToConsole(std::ostream* stream_to_check,
+                                        bool print_warning) {
   if (stream_to_check == &std::cout && sys::Process::StandardOutIsDisplayed()) {
-    std::cerr << "WARNING: You're attempting to print out a bytecode file.\n";
-    std::cerr << "This is inadvisable as it may cause display problems. If\n";
-    std::cerr << "you REALLY want to taste LLVM bytecode first-hand, you can\n";
-    std::cerr << "force output with the `-f' option.\n\n";
+    if (print_warning) {
+      std::cerr << "WARNING: You're attempting to print out a bytecode file.\n";
+      std::cerr << "This is inadvisable as it may cause display problems. If\n";
+      std::cerr << "you REALLY want to taste LLVM bytecode first-hand, you\n";
+      std::cerr << "can force output with the `-f' option.\n\n";
+    }
     return true;
   }
   return false;