File: inlining-issue67557.rs

package info (click to toggle)
rustc-web 1.78.0%2Bdfsg1-2~deb11u3
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,245,360 kB
  • sloc: xml: 147,985; javascript: 18,022; sh: 11,083; python: 10,265; ansic: 6,172; cpp: 5,023; asm: 4,390; makefile: 4,269
file content (42 lines) | stat: -rw-r--r-- 953 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
// This used to cause assert_10_13 to unexpectingly fail, due to simd_shuffle_indices being passed
// the wrong Instance, causing issues with inlining. See #67557.
//
//@ run-pass
//@ compile-flags: -Zmir-opt-level=4
#![feature(intrinsics, repr_simd)]

extern "rust-intrinsic" {
    fn simd_shuffle<T, I, U>(x: T, y: T, idx: I) -> U;
}

#[repr(simd)]
#[derive(Debug, PartialEq)]
struct Simd2(u8, u8);

fn main() {
    unsafe {
        const IDX: [u32; 2] = [0, 1];
        let p_res: Simd2 = simd_shuffle(Simd2(10, 11), Simd2(12, 13), IDX);
        let a_res: Simd2 = inline_me();

        assert_10_11(p_res);
        assert_10_13(a_res);
    }
}

#[inline(never)]
fn assert_10_11(x: Simd2) {
    assert_eq!(x, Simd2(10, 11));
}

#[inline(never)]
fn assert_10_13(x: Simd2) {
    assert_eq!(x, Simd2(10, 13));
}


#[inline(always)]
unsafe fn inline_me() -> Simd2 {
    const IDX: [u32; 2] = [0, 3];
    simd_shuffle(Simd2(10, 11), Simd2(12, 13), IDX)
}