[llvm] [X86][MC] Report error when the instruction length exceeds 15 bytes (PR #83708)

[Shengchen Kan via llvm-commits]

KanRobert wrote:

>  Compiler need to take this responsibility to emit error or never generate SIB addressing in this case.

I don't think compilers should be so smart for inline assemble... Error when encoding sounds acceptable to me.

https://github.com/llvm/llvm-project/pull/83708