ptr_aligment_type: add more APIs

compiler/rustc_codegen_cranelift/patches/0027-sysroot_tests-128bit-atomic-operations.patch

@@ -14,11 +14,10 @@ diff --git a/coretests/tests/lib.rs b/coretests/tests/lib.rs
 index 1e336bf..35e6f54 100644
 --- a/coretests/tests/lib.rs
 +++ b/coretests/tests/lib.rs
-@@ -2,5 +2,4 @@
+@@ -2,4 +2,3 @@
  // tidy-alphabetical-start
 -#![cfg_attr(target_has_atomic = "128", feature(integer_atomics))]
  #![cfg_attr(test, feature(cfg_select))]
- #![feature(alloc_layout_extra)]
  #![feature(array_ptr_get)]
 diff --git a/coretests/tests/atomic.rs b/coretests/tests/atomic.rs
 index b735957..ea728b6 100644

library/alloc/src/alloc.rs

@@ -184,7 +184,7 @@ impl Global {
     #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
     fn alloc_impl(&self, layout: Layout, zeroed: bool) -> Result<NonNull<[u8]>, AllocError> {
         match layout.size() {
-            0 => Ok(NonNull::slice_from_raw_parts(layout.dangling(), 0)),
+            0 => Ok(NonNull::slice_from_raw_parts(layout.dangling_ptr(), 0)),
             // SAFETY: `layout` is non-zero in size,
             size => unsafe {
                 let raw_ptr = if zeroed { alloc_zeroed(layout) } else { alloc(layout) };
@@ -314,7 +314,7 @@ unsafe impl Allocator for Global {
             // SAFETY: conditions must be upheld by the caller
             0 => unsafe {
                 self.deallocate(ptr, old_layout);
-                Ok(NonNull::slice_from_raw_parts(new_layout.dangling(), 0))
+                Ok(NonNull::slice_from_raw_parts(new_layout.dangling_ptr(), 0))
             },
 
             // SAFETY: `new_size` is non-zero. Other conditions must be upheld by the caller

library/alloc/src/boxed/thin.rs

@@ -245,7 +245,7 @@ impl<H> WithHeader<H> {
                 // Some paranoia checking, mostly so that the ThinBox tests are
                 // more able to catch issues.
                 debug_assert!(value_offset == 0 && T::IS_ZST && H::IS_ZST);
-                layout.dangling()
+                layout.dangling_ptr()
             } else {
                 let ptr = alloc::alloc(layout);
                 if ptr.is_null() {
@@ -282,7 +282,7 @@ impl<H> WithHeader<H> {
                 // Some paranoia checking, mostly so that the ThinBox tests are
                 // more able to catch issues.
                 debug_assert!(value_offset == 0 && size_of::<T>() == 0 && size_of::<H>() == 0);
-                layout.dangling()
+                layout.dangling_ptr()
             } else {
                 let ptr = alloc::alloc(layout);
                 if ptr.is_null() {

library/alloc/src/lib.rs

@@ -86,7 +86,6 @@
 // Library features:
 // tidy-alphabetical-start
 #![cfg_attr(not(no_global_oom_handling), feature(string_replace_in_place))]
-#![feature(alloc_layout_extra)]
 #![feature(allocator_api)]
 #![feature(array_into_iter_constructors)]
 #![feature(array_windows)]

library/alloc/src/rc.rs

@@ -252,7 +252,7 @@ use core::intrinsics::abort;
 #[cfg(not(no_global_oom_handling))]
 use core::iter;
 use core::marker::{PhantomData, Unsize};
-use core::mem::{self, ManuallyDrop, align_of_val_raw};
+use core::mem::{self, ManuallyDrop};
 use core::num::NonZeroUsize;
 use core::ops::{CoerceUnsized, Deref, DerefMut, DerefPure, DispatchFromDyn, LegacyReceiver};
 #[cfg(not(no_global_oom_handling))]
@@ -261,7 +261,7 @@ use core::panic::{RefUnwindSafe, UnwindSafe};
 #[cfg(not(no_global_oom_handling))]
 use core::pin::Pin;
 use core::pin::PinCoerceUnsized;
-use core::ptr::{self, NonNull, drop_in_place};
+use core::ptr::{self, Alignment, NonNull, drop_in_place};
 #[cfg(not(no_global_oom_handling))]
 use core::slice::from_raw_parts_mut;
 use core::{borrow, fmt, hint};
@@ -3759,15 +3759,15 @@ unsafe fn data_offset<T: ?Sized>(ptr: *const T) -> usize {
     // Because RcInner is repr(C), it will always be the last field in memory.
     // SAFETY: since the only unsized types possible are slices, trait objects,
     // and extern types, the input safety requirement is currently enough to
-    // satisfy the requirements of align_of_val_raw; this is an implementation
+    // satisfy the requirements of Alignment::of_val_raw; this is an implementation
     // detail of the language that must not be relied upon outside of std.
-    unsafe { data_offset_align(align_of_val_raw(ptr)) }
+    unsafe { data_offset_alignment(Alignment::of_val_raw(ptr)) }
 }
 
 #[inline]
-fn data_offset_align(align: usize) -> usize {
+fn data_offset_alignment(alignment: Alignment) -> usize {
     let layout = Layout::new::<RcInner<()>>();
-    layout.size() + layout.padding_needed_for(align)
+    layout.size() + layout.padding_needed_for(alignment)
 }
 
 /// A uniquely owned [`Rc`].
@@ -4379,7 +4379,7 @@ impl<T: ?Sized, A: Allocator> UniqueRcUninit<T, A> {
 
     /// Returns the pointer to be written into to initialize the [`Rc`].
     fn data_ptr(&mut self) -> *mut T {
-        let offset = data_offset_align(self.layout_for_value.align());
+        let offset = data_offset_alignment(self.layout_for_value.alignment());
         unsafe { self.ptr.as_ptr().byte_add(offset) as *mut T }
     }
 

library/alloc/src/sync.rs

@@ -19,14 +19,14 @@ use core::intrinsics::abort;
 #[cfg(not(no_global_oom_handling))]
 use core::iter;
 use core::marker::{PhantomData, Unsize};
-use core::mem::{self, ManuallyDrop, align_of_val_raw};
+use core::mem::{self, ManuallyDrop};
 use core::num::NonZeroUsize;
 use core::ops::{CoerceUnsized, Deref, DerefMut, DerefPure, DispatchFromDyn, LegacyReceiver};
 #[cfg(not(no_global_oom_handling))]
 use core::ops::{Residual, Try};
 use core::panic::{RefUnwindSafe, UnwindSafe};
 use core::pin::{Pin, PinCoerceUnsized};
-use core::ptr::{self, NonNull};
+use core::ptr::{self, Alignment, NonNull};
 #[cfg(not(no_global_oom_handling))]
 use core::slice::from_raw_parts_mut;
 use core::sync::atomic::Ordering::{Acquire, Relaxed, Release};
@@ -4117,15 +4117,15 @@ unsafe fn data_offset<T: ?Sized>(ptr: *const T) -> usize {
     // Because ArcInner is repr(C), it will always be the last field in memory.
     // SAFETY: since the only unsized types possible are slices, trait objects,
     // and extern types, the input safety requirement is currently enough to
-    // satisfy the requirements of align_of_val_raw; this is an implementation
+    // satisfy the requirements of Alignment::of_val_raw; this is an implementation
     // detail of the language that must not be relied upon outside of std.
-    unsafe { data_offset_align(align_of_val_raw(ptr)) }
+    unsafe { data_offset_alignment(Alignment::of_val_raw(ptr)) }
 }
 
 #[inline]
-fn data_offset_align(align: usize) -> usize {
+fn data_offset_alignment(alignment: Alignment) -> usize {
     let layout = Layout::new::<ArcInner<()>>();
-    layout.size() + layout.padding_needed_for(align)
+    layout.size() + layout.padding_needed_for(alignment)
 }
 
 /// A unique owning pointer to an [`ArcInner`] **that does not imply the contents are initialized,**
@@ -4156,7 +4156,7 @@ impl<T: ?Sized, A: Allocator> UniqueArcUninit<T, A> {
 
     /// Returns the pointer to be written into to initialize the [`Arc`].
     fn data_ptr(&mut self) -> *mut T {
-        let offset = data_offset_align(self.layout_for_value.align());
+        let offset = data_offset_alignment(self.layout_for_value.alignment());
         unsafe { self.ptr.as_ptr().byte_add(offset) as *mut T }
     }
 

library/alloctests/lib.rs

@@ -14,7 +14,6 @@
 //
 // Library features:
 // tidy-alphabetical-start
-#![feature(alloc_layout_extra)]
 #![feature(allocator_api)]
 #![feature(array_into_iter_constructors)]
 #![feature(assert_matches)]

library/alloctests/tests/boxed.rs

@@ -104,7 +104,7 @@ pub struct ConstAllocator;
 unsafe impl Allocator for ConstAllocator {
     fn allocate(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError> {
         match layout.size() {
-            0 => Ok(NonNull::slice_from_raw_parts(layout.dangling(), 0)),
+            0 => Ok(NonNull::slice_from_raw_parts(layout.dangling_ptr(), 0)),
             _ => unsafe {
                 let ptr = core::intrinsics::const_allocate(layout.size(), layout.align());
                 Ok(NonNull::new_unchecked(ptr as *mut [u8; 0] as *mut [u8]))

library/alloctests/tests/lib.rs

@@ -1,5 +1,4 @@
 #![feature(allocator_api)]
-#![feature(alloc_layout_extra)]
 #![feature(iter_array_chunks)]
 #![feature(assert_matches)]
 #![feature(wtf8_internals)]