[llvm] [AArch64][SVE] Detect MOV (imm, pred, zeroing/merging) (PR #116032)

[Ricardo Jesus via llvm-commits]

rj-jesus wrote:

Thanks for the feedback, I've now pushed the patterns into `sve_int_dup_imm_pred_zero` and `sve_int_dup_imm_pred_merge` as appropriate - is what you had in mind?

As for the unpredicated case, does it make sense to make that change here as well?
As you say, there are unpredicated variants that can already be used, though it might still be a nice fold to have.

https://github.com/llvm/llvm-project/pull/116032