Don't crash on invalid instructions when disassembling MBlaze code.
This fixes http://llvm.org/bugs/show_bug.cgi?id=9653


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129303 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed