RUSTFLAGS="--emit asm" cargo build

some_trait.rs

#![no_std]

pub trait Foo {
    fn sum(&self, x: i32, y: i32) -> i32;
}

struct FooInstance;

impl Foo for FooInstance {
    fn sum(&self, x: i32, y: i32) -> i32 {
        x + y
    }
}

struct FooInstance2;

impl Foo for FooInstance2 {
    fn sum(&self, x: i32, y: i32) -> i32 {
        x + y + 100
    }
}

fn call_sum<T: Foo>(x: T) -> i32 {
    x.sum(10, 10)
}

pub fn result() -> i32{
    let f = FooInstance;
    let f2 = FooInstance2;
    call_sum(f) + call_sum(f2)
}