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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/structs-enums/rec-align-u32.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/structs-enums/rec-align-u32.rs')
-rw-r--r-- | tests/ui/structs-enums/rec-align-u32.rs | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/tests/ui/structs-enums/rec-align-u32.rs b/tests/ui/structs-enums/rec-align-u32.rs new file mode 100644 index 000000000..ee704198d --- /dev/null +++ b/tests/ui/structs-enums/rec-align-u32.rs @@ -0,0 +1,57 @@ +// run-pass +#![allow(dead_code)] +#![allow(unused_unsafe)] +// Issue #2303 + +#![feature(intrinsics)] + +use std::mem; + +mod rusti { + extern "rust-intrinsic" { + pub fn pref_align_of<T>() -> usize; + #[rustc_safe_intrinsic] + pub fn min_align_of<T>() -> usize; + } +} + +// This is the type with the questionable alignment +#[derive(Debug)] +struct Inner { + c64: u32 +} + +// This is the type that contains the type with the +// questionable alignment, for testing +#[derive(Debug)] +struct Outer { + c8: u8, + t: Inner +} + +mod m { + pub fn align() -> usize { 4 } + pub fn size() -> usize { 8 } +} + +pub fn main() { + unsafe { + let x = Outer {c8: 22, t: Inner {c64: 44}}; + + // Send it through the shape code + let y = format!("{:?}", x); + + println!("align inner = {:?}", rusti::min_align_of::<Inner>()); + println!("size outer = {:?}", mem::size_of::<Outer>()); + println!("y = {:?}", y); + + // per clang/gcc the alignment of `inner` is 4 on x86. + assert_eq!(rusti::min_align_of::<Inner>(), m::align()); + + // per clang/gcc the size of `outer` should be 12 + // because `inner`s alignment was 4. + assert_eq!(mem::size_of::<Outer>(), m::size()); + + assert_eq!(y, "Outer { c8: 22, t: Inner { c64: 44 } }".to_string()); + } +} |