[Bug target/59843] ICE with return of generic vector on aarch64

[alan.lawrence at arm dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59843

--- Comment #10 from Alan Lawrence <alan.lawrence at arm dot com> ---
I can confirm that prior to V1DFmode, all four of those cases gave an ICE (in
emit_move_insn, via a variety of routes).