From 519e1475d64d80f4632296318b3a5240d4f70a72 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Wed, 13 Feb 2013 04:53:40 +0000
Subject: [PATCH] use memcpy instead of dubious union to type pun two values,
 thanks to David Blaike for pointing this out.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175032 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Bitcode/BitstreamReader.h | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/include/llvm/Bitcode/BitstreamReader.h b/include/llvm/Bitcode/BitstreamReader.h
index edec6e1da51..2d2976cde13 100644
--- a/include/llvm/Bitcode/BitstreamReader.h
+++ b/include/llvm/Bitcode/BitstreamReader.h
@@ -364,16 +364,17 @@ public:
     uint32_t R = uint32_t(CurWord);
 
     // Read the next word from the stream.
-    union {
-      uint8_t ArrayMember[sizeof(word_t)];
-      support::detail::packed_endian_specific_integral
-      <word_t, support::little, support::unaligned> EndianMember;
-    } buf = { { 0 } };
+    uint8_t Array[sizeof(word_t)] = {0};
+    
+    BitStream->getBitcodeBytes().readBytes(NextChar, sizeof(Array),
+                                           Array, NULL);
     
-    BitStream->getBitcodeBytes().readBytes(NextChar, sizeof(buf),
-                                           buf.ArrayMember, NULL);
     // Handle big-endian byte-swapping if necessary.
-    CurWord = buf.EndianMember;
+    support::detail::packed_endian_specific_integral
+      <word_t, support::little, support::unaligned> EndianValue;
+    memcpy(&EndianValue, Array, sizeof(Array));
+    
+    CurWord = EndianValue;
 
     NextChar += sizeof(word_t);