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check that store/load rountrip initializes all bytes

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Folkert de Vries
2026-03-19 15:08:04 +01:00
parent ebfdd898ca
commit 8f3850c74c
1 changed files with 5 additions and 1 deletions
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library/stdarch/crates/core_arch/src/aarch64/neon/mod.rs
+5 -1
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@@ -1022,8 +1022,12 @@ macro_rules! wide_store_load_roundtrip {
($elem_ty:ty, $len:expr, $vec_ty:ty, $store:expr, $load:expr) => {
let vals: [$elem_ty; $len] = crate::array::from_fn(|i| i as $elem_ty);
let a: $vec_ty = transmute(vals);
let mut tmp = [0 as $elem_ty; $len];
let mut tmp = core::mem::MaybeUninit::<[$elem_ty; $len]>::uninit();
$store(tmp.as_mut_ptr().cast(), a);
// With Miri this will check that all elements were initialized.
let tmp = tmp.assume_init();
let r: $vec_ty = $load(tmp.as_ptr().cast());
let out: [$elem_ty; $len] = transmute(r);
assert_eq!(out, vals);