[llvm] r230931 - [X86] There are only 8 mask registers. Fail disassembly if instruction tries to reference more.

[Craig Topper]

Author: ctopper
Date: Sun Mar  1 21:33:11 2015
New Revision: 230931

URL: http://llvm.org/viewvc/llvm-project?rev=230931&view=rev
Log:
[X86] There are only 8 mask registers. Fail disassembly if instruction tries to reference more.

Modified:
    llvm/trunk/lib/Target/X86/Disassembler/X86DisassemblerDecoder.cpp

Modified: llvm/trunk/lib/Target/X86/Disassembler/X86DisassemblerDecoder.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/Disassembler/X86DisassemblerDecoder.cpp?rev=230931&r1=230930&r2=230931&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/Disassembler/X86DisassemblerDecoder.cpp (original)
+++ llvm/trunk/lib/Target/X86/Disassembler/X86DisassemblerDecoder.cpp Sun Mar  1 21:33:11 2015
@@ -1458,6 +1458,8 @@ static int readModRM(struct InternalInst
     case TYPE_VK1:                                        \
     case TYPE_VK8:                                        \
     case TYPE_VK16:                                       \
+      if (index > 7)                                      \
+        *valid = 0;                                       \
       return prefix##_K0 + index;                         \
     case TYPE_MM64:                                       \
       return prefix##_MM0 + (index & 0x7);                \