rust/src/test/mir-opt/inline/inline-trait-method.rs

// compile-flags: -Z span_free_formats

fn main() {
    println!("{}", test(&()));
}

// EMIT_MIR rustc.test.Inline.after.mir
fn test(x: &dyn X) -> u32 {
    x.y()
}

trait X {
    fn y(&self) -> u32 {
        1
    }
}

impl X for () {
    fn y(&self) -> u32 {
        2
    }
}