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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/simd/issue-32947.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/simd/issue-32947.rs')
-rw-r--r-- | tests/ui/simd/issue-32947.rs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/tests/ui/simd/issue-32947.rs b/tests/ui/simd/issue-32947.rs new file mode 100644 index 000000000..b07def21e --- /dev/null +++ b/tests/ui/simd/issue-32947.rs @@ -0,0 +1,24 @@ +// run-pass +// ignore-emscripten FIXME(#45351) + +#![feature(repr_simd, test)] + +extern crate test; + +#[repr(simd)] +pub struct Mu64(pub u64, pub u64, pub u64, pub u64); + +fn main() { + // This ensures an unaligned pointer even in optimized builds, though LLVM + // gets enough type information to actually not mess things up in that case, + // but at the time of writing this, it's enough to trigger the bug in + // non-optimized builds + unsafe { + let memory = &mut [0u64; 8] as *mut _ as *mut u8; + let misaligned_ptr: &mut [u8; 32] = { + std::mem::transmute(memory.offset(1)) + }; + *misaligned_ptr = std::mem::transmute(Mu64(1, 1, 1, 1)); + test::black_box(memory); + } +} |