{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
                let high_or_low = fx.bcx.ins().band_imm(control, 0b0001);
                let a_or_b = fx.bcx.ins().band_imm(control, 0b0010);
                let is_zero = fx.bcx.ins().band_imm(control, 0b1000);