bjoernager/rust
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only set noalias on Box with the global allocator

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This commit is contained in:
Ralf Jung 2024-03-05 11:32:03 +01:00
parent 5a1e5449c8
commit f391c0793b
17 changed files with 75 additions and 28 deletions
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7
compiler/rustc_codegen_cranelift/example/mini_core.rs
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@ -525,8 +525,11 @@ pub struct Unique<T: ?Sized> {
impl<T: ?Sized, U: ?Sized> CoerceUnsized<Unique<U>> for Unique<T> where T: Unsize<U> {}
impl<T: ?Sized, U: ?Sized> DispatchFromDyn<Unique<U>> for Unique<T> where T: Unsize<U> {}
#[lang = "global_alloc_ty"]
pub struct Global;
#[lang = "owned_box"]
pub struct Box<T: ?Sized, A = ()>(Unique<T>, A);
pub struct Box<T: ?Sized, A = Global>(Unique<T>, A);
impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Box<U>> for Box<T> {}
@ -536,7 +539,7 @@ impl<T> Box<T> {
let size = intrinsics::size_of::<T>();
let ptr = libc::malloc(size);
intrinsics::copy(&val as *const T as *const u8, ptr, size);
Box(Unique { pointer: NonNull(ptr as *const T), _marker: PhantomData }, ())
Box(Unique { pointer: NonNull(ptr as *const T), _marker: PhantomData }, Global)
}
}
}