1export fn foo() void {
 2    const f: i64 = 1000;
 3
 4    asm volatile (
 5        \\ movq $10, %[f]
 6        : [f] "=r" (f),
 7    );
 8}
 9
10// error
11//
12// :4:5: error: asm cannot output to const local 'f'