diff --git a/llvm/lib/Target/AVR/MCTargetDesc/AVRMCCodeEmitter.cpp b/llvm/lib/Target/AVR/MCTargetDesc/AVRMCCodeEmitter.cpp
--- a/llvm/lib/Target/AVR/MCTargetDesc/AVRMCCodeEmitter.cpp
+++ b/llvm/lib/Target/AVR/MCTargetDesc/AVRMCCodeEmitter.cpp
@@ -25,6 +25,7 @@
 #include "llvm/MC/MCRegisterInfo.h"
 #include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/Support/Casting.h"
+#include "llvm/Support/EndianStream.h"
 #include "llvm/Support/raw_ostream.h"
 
 #define DEBUG_TYPE "mccodeemitter"
@@ -268,14 +269,11 @@
 void AVRMCCodeEmitter::emitInstruction(uint64_t Val, unsigned Size,
                                        const MCSubtargetInfo &STI,
                                        raw_ostream &OS) const {
-  const uint16_t *Words = reinterpret_cast<uint16_t const *>(&Val);
   size_t WordCount = Size / 2;
 
   for (int64_t i = WordCount - 1; i >= 0; --i) {
-    uint16_t Word = Words[i];
-
-    OS << (uint8_t) ((Word & 0x00ff) >> 0);
-    OS << (uint8_t) ((Word & 0xff00) >> 8);
+    uint16_t Word = (Val >> (i * 16)) & 0xFFFF;
+    support::endian::write(OS, Word, support::endianness::little);
   }
 }