src/test/ui/simd/intrinsic/generic-shuffle.rs

   1 // build-fail
   2
   3 // Test that the simd_shuffle intrinsic produces ok-ish error
   4 // messages when misused.
   5
   6 #![feature(repr_simd, platform_intrinsics)]
   7
   8 #[repr(simd)]
   9 #[derive(Copy, Clone)]
  10 pub struct Simd<T, const N: usize>([T; N]);
  11
  12 extern "platform-intrinsic" {
  13     fn simd_shuffle<T, I, U>(a: T, b: T, i: I) -> U;
  14 }
  15
  16 fn main() {
  17     const I: [u32; 2] = [0; 2];
  18     const I2: [f32; 2] = [0.; 2];
  19     let v = Simd::<u32, 4>([0; 4]);
  20
  21     unsafe {
  22         let _: Simd<u32, 2> = simd_shuffle(v, v, I);
  23
  24         let _: Simd<u32, 4> = simd_shuffle(v, v, I);
  25         //~^ ERROR invalid monomorphization of `simd_shuffle` intrinsic
  26
  27         let _: Simd<f32, 2> = simd_shuffle(v, v, I);
  28         //~^ ERROR invalid monomorphization of `simd_shuffle` intrinsic
  29
  30         let _: Simd<u32, 2> = simd_shuffle(v, v, I2);
  31         //~^ ERROR invalid monomorphization of `simd_shuffle` intrinsic
  32     }
  33 }