[llvm] 29b4d8f - [AVR] Fix endianness handling in AVR MC

[via llvm-commits]

Author: serge_sans_paille
Date: 2019-11-25T11:41:05+01:00
New Revision: 29b4d8f19e30910c099c5453da258843d6b7869a

URL: https://github.com/llvm/llvm-project/commit/29b4d8f19e30910c099c5453da258843d6b7869a
DIFF: https://github.com/llvm/llvm-project/commit/29b4d8f19e30910c099c5453da258843d6b7869a.diff

LOG: [AVR] Fix endianness handling in AVR MC

Differential Revision: https://reviews.llvm.org/D67926

Added: 
    

Modified: 
    llvm/lib/Target/AVR/MCTargetDesc/AVRMCCodeEmitter.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/AVR/MCTargetDesc/AVRMCCodeEmitter.cpp b/llvm/lib/Target/AVR/MCTargetDesc/AVRMCCodeEmitter.cpp
index bc0488778685..db995e247562 100644
--- 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 @@ unsigned AVRMCCodeEmitter::getMachineOpValue(const MCInst &MI,
 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);
   }
 }