Ahmed Bougacha 85dc93c56b [X86] Decode MPX BND registers. ...

We were able to assemble, but not disassemble.

Note that fixupRMValue was truncating EA_REG_BND0-3 because we hit
the uint8_t max.  The control registers were already squarely above
it, but I don't think they ever go in .r/m, only in .reg.

I also did notice an extra REX.W in our encoding, but I think that's
fine.

llvm-svn: 275427

2016-07-14 14:53:21 +00:00

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