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