self-hosted: better IR for empty fn
self-hosted: better IR for empty fn

avoids a void

raulgrell/zig,Dimenus/zig,zig-lang/zig,raulgrell/zig,raulgrell/zig,raulgrell/zig,Dimenus/zig,zig-lang/zig,raulgrell/zig,andrewrk/zig,zig-lang/zig,andrewrk/zig,Dimenus/zig