From 26fc7858dbbfcbe09626aa237571a1adb97bb7d5 Mon Sep 17 00:00:00 2001
From: Sean Callanan <scallanan@apple.com>
Date: Wed, 2 Feb 2011 01:09:02 +0000
Subject: Fixed a bug in the disassembler where the mandatory 0x66 prefix would
 be misinterpreted in some cases on 32-bit x86 platforms.  Thanks to Olivier
 Meurant for identifying the bug.

llvm-svn: 124709
---
 llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c')

diff --git a/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c b/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c
index 7b17f1e5a3a..b6546fc9e86 100644
--- a/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c
+++ b/llvm/lib/Target/X86/Disassembler/X86DisassemblerDecoder.c
@@ -388,6 +388,7 @@ static int readPrefixes(struct InternalInstruction* insn) {
     }
   } else {
     unconsumeByte(insn);
+    insn->necessaryPrefixLocation = insn->readerCursor - 1;
   }
   
   if (insn->mode == MODE_16BIT) {
-- 
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