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Diffstat (limited to 'src/test/ui/simd/array-trait.rs')
-rw-r--r-- | src/test/ui/simd/array-trait.rs | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/test/ui/simd/array-trait.rs b/src/test/ui/simd/array-trait.rs new file mode 100644 index 000000000..45c10b378 --- /dev/null +++ b/src/test/ui/simd/array-trait.rs @@ -0,0 +1,41 @@ +// Figuring out the size of a vector type that depends on traits doesn't ICE + +#![allow(dead_code)] + +// pretty-expanded FIXME #23616 + +#![feature(repr_simd, platform_intrinsics, generic_const_exprs)] +#![allow(non_camel_case_types, incomplete_features)] + +pub trait Simd { + type Lane: Clone + Copy; + const SIZE: usize; +} + +pub struct i32x4; +impl Simd for i32x4 { + type Lane = i32; + const SIZE: usize = 4; +} + +#[repr(simd)] +#[derive(Copy, Clone)] +pub struct T<S: Simd>([S::Lane; S::SIZE]); +//~^ ERROR unconstrained generic constant + +extern "platform-intrinsic" { + fn simd_insert<T, E>(x: T, idx: u32, y: E) -> T; + fn simd_extract<T, E>(x: T, idx: u32) -> E; +} + +pub fn main() { + let mut t = T::<i32x4>([0; 4]); + unsafe { + for i in 0_i32..4 { + t = simd_insert(t, i as u32, i); + } + for i in 0_i32..4 { + assert_eq!(i, simd_extract(t, i as u32)); + } + } +} |