[llvm] [AArch64] Allow only LSL to be folded into addressing mode (PR #69235)

[Momchil Velikov via llvm-commits]

momchil-velikov wrote:

> It might be a good idea to add this as a mir test, as GISel could change in the future to be more like SDAG.

Ah, indeed! Done.


https://github.com/llvm/llvm-project/pull/69235