tests/fail/function_calls/target_feature.rs

//@only-target-x86_64: uses x86 target features
//@ignore-target-x86_64-apple-darwin: that target actually has ssse3

fn main() {
    assert!(!is_x86_feature_detected!("ssse3"));
    unsafe {
        ssse3_fn(); //~ ERROR: calling a function that requires unavailable target features: ssse3
    }
}

#[target_feature(enable = "ssse3")]
unsafe fn ssse3_fn() {}