rust/tests/ui/simd/intrinsic/ptr-cast.rs

//@ run-pass

#![feature(repr_simd, core_intrinsics)]

#[path = "../../../auxiliary/minisimd.rs"]
mod minisimd;
use minisimd::*;

use std::intrinsics::simd::{simd_cast_ptr, simd_expose_provenance, simd_with_exposed_provenance};

type V<T> = Simd<T, 2>;

fn main() {
    unsafe {
        let mut foo = 4i8;
        let ptr = &mut foo as *mut i8;

        let ptrs: V::<*mut i8> = Simd([ptr, core::ptr::null_mut()]);

        // change constness and type
        let const_ptrs: V<*const u8> = simd_cast_ptr(ptrs);

        let exposed_addr: V<usize> = simd_expose_provenance(const_ptrs);

        let with_exposed_provenance: V<*mut i8> = simd_with_exposed_provenance(exposed_addr);

        assert!(const_ptrs.into_array() == [ptr as *const u8, core::ptr::null()]);
        assert!(exposed_addr.into_array() == [ptr as usize, 0]);
        assert!(with_exposed_provenance.into_array() == ptrs.into_array());
    }
}