diff --git a/llvm/lib/MC/MCInstPrinter.cpp b/llvm/lib/MC/MCInstPrinter.cpp
index 0dc3121..23afe80 100644
--- a/llvm/lib/MC/MCInstPrinter.cpp
+++ b/llvm/lib/MC/MCInstPrinter.cpp
@@ -16,6 +16,15 @@
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 
+void llvm::dumpBytes(ArrayRef<uint8_t> bytes, raw_ostream &OS) {
+  static const char hex_rep[] = "0123456789abcdef";
+  for (char i: bytes) {
+    OS << hex_rep[(i & 0xF0) >> 4];
+    OS << hex_rep[i & 0xF];
+    OS << ' ';
+  }
+}
+
 MCInstPrinter::~MCInstPrinter() {
 }