53d48902bc
This operation provides a convenient way to query the streaming vector length regardless of the streaming mode. This most useful for functions that call/pass data to streaming functions, but are not streaming themselves. Example: ```mlir %svl_w = arm_sme.streaming_vl <word> ``` Created based on discussion here: https://github.com/llvm/llvm-project/pull/76086#discussion_r1434226352