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Add Miri smoke pass test for ptr_metadata intrinsic

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This commit is contained in:
Scott McMurray 2024-05-27 14:45:45 -07:00
parent 5a8c1f372a
commit 57948c84ec
1 changed files with 7 additions and 1 deletions
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8
src/tools/miri/tests/pass/intrinsics/intrinsics.rs
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@ -1,5 +1,5 @@
//@compile-flags: -Zmiri-permissive-provenance
#![feature(core_intrinsics, layout_for_ptr)]
#![feature(core_intrinsics, layout_for_ptr, ptr_metadata)]
//! Tests for various intrinsics that do not fit anywhere else.
use std::intrinsics;
@ -57,4 +57,10 @@ fn main() {
// Make sure that even if the discriminant is stored together with data, the intrinsic returns
// only the discriminant, nothing about the data.
assert_eq!(discriminant(&Some(false)), discriminant(&Some(true)));
let () = intrinsics::ptr_metadata(&[1, 2, 3]);
let len = intrinsics::ptr_metadata(&[1, 2, 3][..]);
assert_eq!(len, 3);
let dyn_meta = intrinsics::ptr_metadata(&[1, 2, 3] as &dyn std::fmt::Debug);
assert_eq!(dyn_meta.size_of(), 12);
}