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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/simd/issue-32947.rs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/simd/issue-32947.rs b/src/test/ui/simd/issue-32947.rs new file mode 100644 index 000000000..b07def21e --- /dev/null +++ b/src/test/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); + } +} |