IR: allow undefined compile time values sometimes
IR: allow undefined compile time values sometimes

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