rust/src/test/compile-fail/simd-intrinsic-generic-cast.rs

// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

#![feature(repr_simd, platform_intrinsics, rustc_attrs)]

#[repr(simd)]
#[derive(Copy, Clone)]
#[allow(non_camel_case_types)]
struct i32x4(i32, i32, i32, i32);
#[repr(simd)]
#[derive(Copy, Clone)]
#[allow(non_camel_case_types)]
struct i32x8(i32, i32, i32, i32,
             i32, i32, i32, i32);

#[repr(simd)]
#[derive(Copy, Clone)]
#[allow(non_camel_case_types)]
struct f32x4(f32, f32, f32, f32);
#[repr(simd)]
#[derive(Copy, Clone)]
#[allow(non_camel_case_types)]
struct f32x8(f32, f32, f32, f32,
             f32, f32, f32, f32);


extern "platform-intrinsic" {
    fn simd_cast<T, U>(x: T) -> U;
}

#[rustc_no_mir] // FIXME #27840 MIR doesn't provide precise spans for calls.
fn main() {
    let x = i32x4(0, 0, 0, 0);

    unsafe {
        simd_cast::<i32, i32>(0);
        //~^ ERROR expected SIMD input type, found non-SIMD `i32`
        simd_cast::<i32, i32x4>(0);
        //~^ ERROR expected SIMD input type, found non-SIMD `i32`
        simd_cast::<i32x4, i32>(x);
        //~^ ERROR expected SIMD return type, found non-SIMD `i32`
        simd_cast::<_, i32x8>(x);
//~^ ERROR return type with length 4 (same as input type `i32x4`), found `i32x8` with length 8
    }
}