llvm-project

4cce1074 - [M68k] Add remaining addressing modes for Atomic operations (#115523)

[M68k] Add remaining addressing modes for Atomic operations (#115523) Had been doing this piece by piece, but makes more sense to do it in a single PR. Adds support for `ARID`, `PCI`, `PCD`, `AL`, and `ARD` addressing modes for atomic operations, along with a variety of tests. The `CodeModel` tests have been rearranged, as some of the new addressing modes are only exercised under some combinations of `CodeModel` and relocation mode