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Auto merge of #3060 - RalfJung:abi, r=RalfJung

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extra ABI tests, in particular for DispatchFromDyn
This commit is contained in:
bors 2023-09-12 06:51:36 +00:00
commit 259b4f0b1c
1 changed files with 16 additions and 6 deletions
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22
src/tools/miri/tests/pass/function_calls/abi_compat.rs
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@ -1,6 +1,7 @@
use std::mem; use std::mem;
use std::num; use std::num;
use std::ptr; use std::ptr;
use std::rc::Rc;
#[derive(Copy, Clone, Default)] #[derive(Copy, Clone, Default)]
struct Zst; struct Zst;
@ -60,8 +61,8 @@ fn test_abi_newtype<T: Copy + Default>() {
} }
fn main() { fn main() {
// Here we check some of the guaranteed ABI compatibilities. // Here we check some of the guaranteed ABI compatibilities:
// Different integer types of the same size and sign. // - Different integer types of the same size and sign.
if cfg!(target_pointer_width = "32") { if cfg!(target_pointer_width = "32") {
test_abi_compat(0usize, 0u32); test_abi_compat(0usize, 0u32);
test_abi_compat(0isize, 0i32); test_abi_compat(0isize, 0i32);
@ -70,15 +71,17 @@ fn main() {
test_abi_compat(0isize, 0i64); test_abi_compat(0isize, 0i64);
} }
test_abi_compat(42u32, num::NonZeroU32::new(1).unwrap()); test_abi_compat(42u32, num::NonZeroU32::new(1).unwrap());
// Reference/pointer types with the same pointee. // - Reference/pointer types with the same pointee.
test_abi_compat(&0u32, &0u32 as *const u32); test_abi_compat(&0u32, &0u32 as *const u32);
test_abi_compat(&mut 0u32 as *mut u32, Box::new(0u32)); test_abi_compat(&mut 0u32 as *mut u32, Box::new(0u32));
test_abi_compat(&(), ptr::NonNull::<()>::dangling()); test_abi_compat(&(), ptr::NonNull::<()>::dangling());
// Reference/pointer types with different but sized pointees. // - Reference/pointer types with different but sized pointees.
test_abi_compat(&0u32, &([true; 4], [0u32; 0])); test_abi_compat(&0u32, &([true; 4], [0u32; 0]));
// `fn` types // - `fn` types
test_abi_compat(main as fn(), id::<i32> as fn(i32) -> i32); test_abi_compat(main as fn(), id::<i32> as fn(i32) -> i32);
// Guaranteed null-pointer-optimizations. // - 1-ZST
test_abi_compat((), [0u8; 0]);
// - Guaranteed null-pointer-optimizations.
test_abi_compat(&0u32 as *const u32, Some(&0u32)); test_abi_compat(&0u32 as *const u32, Some(&0u32));
test_abi_compat(main as fn(), Some(main as fn())); test_abi_compat(main as fn(), Some(main as fn()));
test_abi_compat(0u32, Some(num::NonZeroU32::new(1).unwrap())); test_abi_compat(0u32, Some(num::NonZeroU32::new(1).unwrap()));
@ -96,4 +99,11 @@ fn main() {
test_abi_newtype::<[u32; 0]>(); test_abi_newtype::<[u32; 0]>();
test_abi_newtype::<[u32; 2]>(); test_abi_newtype::<[u32; 2]>();
test_abi_newtype::<[u32; 32]>(); test_abi_newtype::<[u32; 32]>();
test_abi_newtype::<Option<i32>>();
test_abi_newtype::<Option<num::NonZeroU32>>();
// Extra test for assumptions made by arbitrary-self-dyn-receivers.
let rc = Rc::new(0);
let rc_ptr: *mut i32 = unsafe { mem::transmute_copy(&rc) };
test_abi_compat(rc, rc_ptr);
} }