ui/issues/issue-28676.rs rustc test fails

[bjorn3]

thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `140723935210376`,
 right: `3`', ~/cg_clif/rust/src/test/ui/issues/issue-28676.rs:29:9

Probably abi incompatibility with C.

Source code

// run-pass
#![allow(dead_code)]
#![allow(improper_ctypes)]

// ignore-wasm32-bare no libc to test ffi with

#[derive(Copy, Clone)]
pub struct Quad { a: u64, b: u64, c: u64, d: u64 }

mod rustrt {
    use super::Quad;

    #[link(name = "rust_test_helpers", kind = "static")]
    extern {
        pub fn get_c_many_params(_: *const (), _: *const (),
                                 _: *const (), _: *const (), f: Quad) -> u64;
    }
}

fn test() {
    unsafe {
        let null = std::ptr::null();
        let q = Quad {
            a: 1,
            b: 2,
            c: 3,
            d: 4
        };
        assert_eq!(rustrt::get_c_many_params(null, null, null, null, q), q.c);
    }
}

pub fn main() {
    test();
}

[bjorn3]

Probably caused by https://github.com/bjorn3/rustc_codegen_cranelift/issues/10#issuecomment-523136265.

[bjorn3]

Fixed by #1068