#zig build-obj {
--name test -fno-emit-bin
-Mroot=test.zig
#}

#write test.zig {
export fn foo() void {
    comptime var a: u32 = 0;
    asm volatile (""
        :
        : [in] "r" (&a),
    );
}

export fn bar() void {
    comptime var a: u32 = 0;
    asm volatile (""
        : [out] "=r" (a),
    );
}
#}
#update
#check errors {
test.zig:5:21: error: assembly input contains reference to comptime var
test.zig:2:14: note: 'in' points to comptime var declared here
test.zig:12:23: error: assembly output contains reference to comptime var
test.zig:10:14: note: 'out' points to comptime var declared here
#}
