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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/issues/issue-99838.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/issues/issue-99838.rs')
-rw-r--r-- | src/test/ui/issues/issue-99838.rs | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-99838.rs b/src/test/ui/issues/issue-99838.rs new file mode 100644 index 000000000..eaeeac72b --- /dev/null +++ b/src/test/ui/issues/issue-99838.rs @@ -0,0 +1,40 @@ +// run-pass +#![feature(bench_black_box)] +use std::hint; + +struct U16(u16); + +impl Drop for U16 { + fn drop(&mut self) { + // Prevent LLVM from optimizing away our alignment check. + assert!(hint::black_box(self as *mut U16 as usize) % 2 == 0); + } +} + +struct HasDrop; + +impl Drop for HasDrop { + fn drop(&mut self) {} +} + +struct Wrapper { + _a: U16, + b: HasDrop, +} + +#[repr(packed)] +struct Misalign(u8, Wrapper); + +fn main() { + let m = Misalign( + 0, + Wrapper { + _a: U16(10), + b: HasDrop, + }, + ); + // Put it somewhere definitely even (so the `a` field is definitely at an odd address). + let m: ([u16; 0], Misalign) = ([], m); + // Move out one field, so we run custom per-field drop logic below. + let _x = m.1.1.b; +} |