var x_4 : i32; var x_1 : vec4; fn main_1() { let x_2 : i32 = x_4; return; } struct main_out { [[builtin(position)]] x_1_1 : vec4; }; [[stage(vertex)]] fn main([[builtin(vertex_index)]] x_4_param : u32) -> main_out { x_4 = bitcast(x_4_param); main_1(); return main_out(x_1); }