[llvm] [InstrRef][AArch64]Add Target hooks for InstrRef on AArch64 (PR #162327)

[Jeremy Morse via llvm-commits]

https://github.com/jmorse commented:

This is good in principle, but note the inline comment about returning "1" for the register: I think this will be misinterpreted by instr-ref. A more limited initial solution might be necessary.

Hard luck with the hundreds of test changes X_X.



https://github.com/llvm/llvm-project/pull/162327