rust/tests/mir-opt/pre-codegen/vec_deref.vec_deref_to_slice.PreCodegen.after.panic-unwind.mir
许杰友 Jieyou Xu (Joe) 10b8ba4ecb Mark simplify_aggregate_to_copy mir-opt as unsound
Co-authored-by: DianQK <dianqk@dianqk.net>
2024-10-31 13:48:06 +08:00

93 lines
3.9 KiB
Rust

// MIR for `vec_deref_to_slice` after PreCodegen
fn vec_deref_to_slice(_1: &Vec<u8>) -> &[u8] {
debug v => _1;
let mut _0: &[u8];
scope 1 (inlined <Vec<u8> as Deref>::deref) {
debug self => _1;
scope 2 (inlined Vec::<u8>::as_slice) {
debug self => _1;
let mut _7: usize;
scope 3 (inlined Vec::<u8>::as_ptr) {
debug self => _1;
let mut _2: &alloc::raw_vec::RawVec<u8>;
scope 4 (inlined alloc::raw_vec::RawVec::<u8>::ptr) {
debug self => _2;
let mut _3: &alloc::raw_vec::RawVecInner;
scope 5 (inlined alloc::raw_vec::RawVecInner::ptr::<u8>) {
debug self => _3;
let mut _6: std::ptr::NonNull<u8>;
scope 6 (inlined alloc::raw_vec::RawVecInner::non_null::<u8>) {
debug self => _3;
let mut _4: std::ptr::NonNull<u8>;
scope 7 (inlined Unique::<u8>::cast::<u8>) {
debug ((self: Unique<u8>).0: std::ptr::NonNull<u8>) => _4;
debug ((self: Unique<u8>).1: std::marker::PhantomData<u8>) => const PhantomData::<u8>;
scope 8 (inlined NonNull::<u8>::cast::<u8>) {
debug self => _4;
scope 9 (inlined NonNull::<u8>::as_ptr) {
debug self => _4;
let mut _5: *const u8;
}
}
}
scope 10 (inlined Unique::<u8>::as_non_null_ptr) {
debug ((self: Unique<u8>).0: std::ptr::NonNull<u8>) => _6;
debug ((self: Unique<u8>).1: std::marker::PhantomData<u8>) => const PhantomData::<u8>;
}
}
scope 11 (inlined NonNull::<u8>::as_ptr) {
debug self => _6;
}
}
}
}
scope 12 (inlined std::slice::from_raw_parts::<'_, u8>) {
debug data => _5;
debug len => _7;
let _8: *const [u8];
scope 13 (inlined core::ub_checks::check_language_ub) {
scope 14 (inlined core::ub_checks::check_language_ub::runtime) {
}
}
scope 15 (inlined std::mem::size_of::<u8>) {
}
scope 16 (inlined align_of::<u8>) {
}
scope 17 (inlined slice_from_raw_parts::<u8>) {
debug data => _5;
debug len => _7;
scope 18 (inlined std::ptr::from_raw_parts::<[u8], u8>) {
debug data_pointer => _5;
debug metadata => _7;
}
}
}
}
}
bb0: {
StorageLive(_2);
_2 = &((*_1).0: alloc::raw_vec::RawVec<u8>);
StorageLive(_3);
_3 = &(((*_1).0: alloc::raw_vec::RawVec<u8>).0: alloc::raw_vec::RawVecInner);
StorageLive(_6);
StorageLive(_4);
_4 = copy (((((*_1).0: alloc::raw_vec::RawVec<u8>).0: alloc::raw_vec::RawVecInner).0: std::ptr::Unique<u8>).0: std::ptr::NonNull<u8>);
_5 = copy (_4.0: *const u8);
_6 = NonNull::<u8> { pointer: copy _5 };
StorageDead(_4);
StorageDead(_6);
StorageDead(_3);
StorageDead(_2);
StorageLive(_7);
_7 = copy ((*_1).1: usize);
StorageLive(_8);
_8 = *const [u8] from (copy _5, copy _7);
_0 = &(*_8);
StorageDead(_8);
StorageDead(_7);
return;
}
}