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// build-fail
#![allow(non_camel_case_types)]
#![feature(repr_simd, platform_intrinsics)]
// Test for #73542 to verify out-of-bounds shuffle vectors do not compile.
#[repr(simd)]
#[derive(Copy, Clone)]
struct u8x2([u8; 2]);
#[repr(simd)]
#[derive(Copy, Clone)]
struct u8x4([u8; 4]);
#[repr(simd)]
#[derive(Copy, Clone)]
struct u8x8([u8; 8]);
#[repr(simd)]
#[derive(Copy, Clone)]
struct u8x16([u8; 16]);
#[repr(simd)]
#[derive(Copy, Clone)]
struct u8x32([u8; 32]);
#[repr(simd)]
#[derive(Copy, Clone)]
struct u8x64([u8; 64]);
extern "platform-intrinsic" {
pub fn simd_shuffle<T, I, U>(x: T, y: T, idx: I) -> U;
}
// Test vectors by lane size. Since LLVM does not distinguish between a shuffle
// over two f32s and a shuffle over two u64s, or any other such combination,
// it is not necessary to test every possible vector, only lane counts.
macro_rules! test_shuffle_lanes {
($n:literal, $x:ident, $y:ident) => {
unsafe {
let shuffle: $x = {
const ARR: [u32; $n] = {
let mut arr = [0; $n];
arr[0] = $n * 2;
arr
};
let mut n: u8 = $n;
let vals = [0; $n].map(|_| { n = n - 1; n });
let vec1 = $x(vals);
let vec2 = $x(vals);
$y(vec1, vec2, ARR)
};
}
}
}
//~^^^^^ ERROR: invalid monomorphization of `simd_shuffle` intrinsic
//~| ERROR: invalid monomorphization of `simd_shuffle` intrinsic
//~| ERROR: invalid monomorphization of `simd_shuffle` intrinsic
//~| ERROR: invalid monomorphization of `simd_shuffle` intrinsic
//~| ERROR: invalid monomorphization of `simd_shuffle` intrinsic
//~| ERROR: invalid monomorphization of `simd_shuffle` intrinsic
// Because the test is mostly embedded in a macro, all the errors have the same origin point.
// And unfortunately, standard comments, as in the UI test harness, disappear in macros!
fn main() {
test_shuffle_lanes!(2, u8x2, simd_shuffle);
test_shuffle_lanes!(4, u8x4, simd_shuffle);
test_shuffle_lanes!(8, u8x8, simd_shuffle);
test_shuffle_lanes!(16, u8x16, simd_shuffle);
test_shuffle_lanes!(32, u8x32, simd_shuffle);
test_shuffle_lanes!(64, u8x64, simd_shuffle);
extern "platform-intrinsic" {
fn simd_shuffle<T, I, U>(a: T, b: T, i: I) -> U;
}
let v = u8x2([0, 0]);
const I: [u32; 2] = [4, 4];
unsafe {
let _: u8x2 = simd_shuffle(v, v, I);
//~^ ERROR invalid monomorphization of `simd_shuffle` intrinsic
}
}
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