[lldb] [llvm] [AArch64][llvm] Tighten SYSP parsing; don't disassemble invalid encodings (PR #182410)

[via llvm-commits]

Lukacma wrote:

It looks like they changed operand constraints in the latest release https://developer.arm.com/documentation/ddi0602/2026-03/Base-Instructions/SYSP--128-bit-system-instruction-?lang=en . Could you update the patch to reflect this ? Also it seems that the scope of the patch changed from the original description, so it would be good to update the patch description I think.

https://github.com/llvm/llvm-project/pull/182410