diff --git a/library/core/src/slice/iter.rs b/library/core/src/slice/iter.rs
index 67fcef0f466..5369fe0a9a9 100644
--- a/library/core/src/slice/iter.rs
+++ b/library/core/src/slice/iter.rs
@@ -90,8 +90,6 @@ impl<'a, T> Iter<'a, T> {
let ptr = slice.as_ptr();
// SAFETY: Similar to `IterMut::new`.
unsafe {
- assume(!ptr.is_null());
-
let end = if T::IS_ZST { invalid(slice.len()) } else { ptr.add(slice.len()) };
Self { ptr: NonNull::new_unchecked(ptr as *mut T), end, _marker: PhantomData }
@@ -228,8 +226,6 @@ impl<'a, T> IterMut<'a, T> {
// See the `next_unchecked!` and `is_empty!` macros as well as the
// `post_inc_start` method for more information.
unsafe {
- assume(!ptr.is_null());
-
let end = if T::IS_ZST { invalid_mut(slice.len()) } else { ptr.add(slice.len()) };
Self { ptr: NonNull::new_unchecked(ptr), end, _marker: PhantomData }
diff --git a/tests/codegen/slice-iter-nonnull.rs b/tests/codegen/slice-iter-nonnull.rs
index 392e4338076..997bdaf5636 100644
--- a/tests/codegen/slice-iter-nonnull.rs
+++ b/tests/codegen/slice-iter-nonnull.rs
@@ -40,3 +40,38 @@ pub fn slice_iter_next_back<'a>(it: &mut std::slice::Iter<'a, u32>) -> Option<&'
it.next_back()
}
+
+// The slice iterator `new` methods used to `assume` that the pointer is non-null,
+// but passing slices already requires that, to the extent that LLVM actually
+// removed the `call @llvm.assume` anyway. These tests just demonstrate that the
+// attribute is there, and confirms adding the assume back doesn't do anything.
+
+// CHECK-LABEL: @slice_iter_new
+// CHECK-SAME: (ptr noalias noundef nonnull {{.+}} %slice.0, {{.+}} noundef %slice.1)
+#[no_mangle]
+pub fn slice_iter_new(slice: &[u32]) -> std::slice::Iter<'_, u32> {
+ // CHECK-NOT: slice
+ // CHECK: %[[END:.+]] = getelementptr inbounds i32{{.+}} %slice.0{{.+}} %slice.1
+ // CHECK-NOT: slice
+ // CHECK: insertvalue {{.+}} ptr %slice.0, 0
+ // CHECK-NOT: slice
+ // CHECK: insertvalue {{.+}} ptr %[[END]], 1
+ // CHECK-NOT: slice
+ // CHECK: }
+ slice.iter()
+}
+
+// CHECK-LABEL: @slice_iter_mut_new
+// CHECK-SAME: (ptr noalias noundef nonnull {{.+}} %slice.0, {{.+}} noundef %slice.1)
+#[no_mangle]
+pub fn slice_iter_mut_new(slice: &mut [u32]) -> std::slice::IterMut<'_, u32> {
+ // CHECK-NOT: slice
+ // CHECK: %[[END:.+]] = getelementptr inbounds i32{{.+}} %slice.0{{.+}} %slice.1
+ // CHECK-NOT: slice
+ // CHECK: insertvalue {{.+}} ptr %slice.0, 0
+ // CHECK-NOT: slice
+ // CHECK: insertvalue {{.+}} ptr %[[END]], 1
+ // CHECK-NOT: slice
+ // CHECK: }
+ slice.iter_mut()
+}
diff --git a/tests/mir-opt/pre-codegen/slice_iter.forward_loop.PreCodegen.after.mir b/tests/mir-opt/pre-codegen/slice_iter.forward_loop.PreCodegen.after.mir
index f27525bf3d9..0da7e5536ae 100644
--- a/tests/mir-opt/pre-codegen/slice_iter.forward_loop.PreCodegen.after.mir
+++ b/tests/mir-opt/pre-codegen/slice_iter.forward_loop.PreCodegen.after.mir
@@ -6,58 +6,120 @@ fn forward_loop(_1: &[T], _2: impl Fn(&T)) -> () {
let mut _0: (); // return place in scope 0 at $DIR/slice_iter.rs:+0:60: +0:60
let mut _3: std::slice::Iter<'_, T>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
let mut _4: std::slice::Iter<'_, T>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
- let mut _5: std::slice::Iter<'_, T>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
- let _6: (); // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
- let mut _7: std::option::Option<&T>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
- let mut _8: &mut std::slice::Iter<'_, T>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
- let mut _9: isize; // in scope 0 at $DIR/slice_iter.rs:+1:5: +3:6
- let mut _11: &impl Fn(&T); // in scope 0 at $DIR/slice_iter.rs:+2:9: +2:10
- let mut _12: (&T,); // in scope 0 at $DIR/slice_iter.rs:+2:9: +2:13
+ let _5: (); // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
+ let mut _6: std::option::Option<&T>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
+ let mut _7: &mut std::slice::Iter<'_, T>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
+ let mut _8: isize; // in scope 0 at $DIR/slice_iter.rs:+1:5: +3:6
+ let mut _10: &impl Fn(&T); // in scope 0 at $DIR/slice_iter.rs:+2:9: +2:10
+ let mut _11: (&T,); // in scope 0 at $DIR/slice_iter.rs:+2:9: +2:13
scope 1 {
- debug iter => _5; // in scope 1 at $DIR/slice_iter.rs:+1:14: +1:26
- let _10: &T; // in scope 1 at $DIR/slice_iter.rs:+1:9: +1:10
+ debug iter => _4; // in scope 1 at $DIR/slice_iter.rs:+1:14: +1:26
+ let _9: &T; // in scope 1 at $DIR/slice_iter.rs:+1:9: +1:10
scope 2 {
- debug x => _10; // in scope 2 at $DIR/slice_iter.rs:+1:9: +1:10
+ debug x => _9; // in scope 2 at $DIR/slice_iter.rs:+1:9: +1:10
}
}
scope 3 (inlined core::slice::<impl [T]>::iter) { // at $DIR/slice_iter.rs:28:20: 28:26
debug self => _1; // in scope 3 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ scope 4 (inlined std::slice::Iter::<'_, T>::new) { // at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ debug slice => _1; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ let _12: *const T; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ let mut _14: bool; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ let mut _15: usize; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ let mut _16: usize; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ let mut _17: std::ptr::NonNull<T>; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ let mut _18: *mut T; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ let mut _19: *const T; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ scope 5 {
+ debug ptr => _12; // in scope 5 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ scope 6 {
+ let _13: *const T; // in scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ scope 7 {
+ debug end => _13; // in scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ scope 13 (inlined NonNull::<T>::new_unchecked) { // at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ debug ptr => _18; // in scope 13 at $SRC_DIR/core/src/ptr/non_null.rs:LL:COL
+ let mut _21: *const T; // in scope 13 at $SRC_DIR/core/src/ptr/non_null.rs:LL:COL
+ let mut _22: *mut T; // in scope 13 at $SRC_DIR/core/src/intrinsics.rs:LL:COL
+ scope 14 {
+ scope 15 (inlined NonNull::<T>::new_unchecked::runtime::<T>) { // at $SRC_DIR/core/src/intrinsics.rs:LL:COL
+ debug ptr => _22; // in scope 15 at $SRC_DIR/core/src/intrinsics.rs:LL:COL
+ scope 16 (inlined ptr::mut_ptr::<impl *mut T>::is_null) { // at $SRC_DIR/core/src/ptr/non_null.rs:LL:COL
+ debug self => _22; // in scope 16 at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ let mut _23: *mut u8; // in scope 16 at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ scope 17 {
+ scope 18 (inlined ptr::mut_ptr::<impl *mut T>::is_null::runtime_impl) { // at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ debug ptr => _23; // in scope 18 at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ scope 19 (inlined ptr::mut_ptr::<impl *mut u8>::addr) { // at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ debug self => _23; // in scope 19 at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ scope 20 {
+ scope 21 (inlined ptr::mut_ptr::<impl *mut u8>::cast::<()>) { // at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ debug self => _23; // in scope 21 at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ scope 9 (inlined invalid::<T>) { // at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ debug addr => _15; // in scope 9 at $SRC_DIR/core/src/ptr/mod.rs:LL:COL
+ scope 10 {
+ }
+ }
+ scope 11 (inlined ptr::const_ptr::<impl *const T>::add) { // at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ debug self => _12; // in scope 11 at $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
+ debug count => _16; // in scope 11 at $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
+ scope 12 {
+ }
+ }
+ }
+ }
+ scope 8 (inlined core::slice::<impl [T]>::as_ptr) { // at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ debug self => _1; // in scope 8 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ let mut _20: *const [T]; // in scope 8 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ }
+ }
}
- scope 4 (inlined <std::slice::Iter<'_, T> as IntoIterator>::into_iter) { // at $DIR/slice_iter.rs:28:14: 28:26
- debug self => _4; // in scope 4 at $SRC_DIR/core/src/iter/traits/collect.rs:LL:COL
+ scope 22 (inlined <std::slice::Iter<'_, T> as IntoIterator>::into_iter) { // at $DIR/slice_iter.rs:28:14: 28:26
+ debug self => _3; // in scope 22 at $SRC_DIR/core/src/iter/traits/collect.rs:LL:COL
}
bb0: {
- StorageLive(_3); // scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
- StorageLive(_4); // scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
- _4 = std::slice::Iter::<'_, T>::new(_1) -> [return: bb10, unwind: bb8]; // scope 3 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
- // mir::Constant
- // + span: $SRC_DIR/core/src/slice/mod.rs:LL:COL
- // + user_ty: UserType(0)
- // + literal: Const { ty: fn(&[T]) -> std::slice::Iter<'_, T> {std::slice::Iter::<'_, T>::new}, val: Value(<ZST>) }
+ StorageLive(_12); // scope 3 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ StorageLive(_20); // scope 8 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ _20 = &raw const (*_1); // scope 8 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ _12 = move _20 as *const T (PtrToPtr); // scope 8 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ StorageDead(_20); // scope 8 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ StorageLive(_13); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageLive(_14); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _14 = const _; // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ switchInt(move _14) -> [0: bb11, otherwise: bb10]; // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
}
bb1: {
- StorageLive(_7); // scope 1 at $DIR/slice_iter.rs:+1:14: +1:26
- _8 = &mut _5; // scope 1 at $DIR/slice_iter.rs:+1:14: +1:26
- _7 = <std::slice::Iter<'_, T> as Iterator>::next(_8) -> [return: bb2, unwind: bb8]; // scope 1 at $DIR/slice_iter.rs:+1:14: +1:26
+ StorageLive(_6); // scope 1 at $DIR/slice_iter.rs:+1:14: +1:26
+ _7 = &mut _4; // scope 1 at $DIR/slice_iter.rs:+1:14: +1:26
+ _6 = <std::slice::Iter<'_, T> as Iterator>::next(_7) -> [return: bb2, unwind: bb8]; // scope 1 at $DIR/slice_iter.rs:+1:14: +1:26
// mir::Constant
// + span: $DIR/slice_iter.rs:28:14: 28:26
// + literal: Const { ty: for<'a> fn(&'a mut std::slice::Iter<'_, T>) -> Option<<std::slice::Iter<'_, T> as Iterator>::Item> {<std::slice::Iter<'_, T> as Iterator>::next}, val: Value(<ZST>) }
}
bb2: {
- _9 = discriminant(_7); // scope 1 at $DIR/slice_iter.rs:+1:14: +1:26
- switchInt(move _9) -> [0: bb5, 1: bb3, otherwise: bb4]; // scope 1 at $DIR/slice_iter.rs:+1:14: +1:26
+ _8 = discriminant(_6); // scope 1 at $DIR/slice_iter.rs:+1:14: +1:26
+ switchInt(move _8) -> [0: bb5, 1: bb3, otherwise: bb4]; // scope 1 at $DIR/slice_iter.rs:+1:14: +1:26
}
bb3: {
- _10 = ((_7 as Some).0: &T); // scope 1 at $DIR/slice_iter.rs:+1:9: +1:10
- StorageLive(_11); // scope 2 at $DIR/slice_iter.rs:+2:9: +2:10
- _11 = &_2; // scope 2 at $DIR/slice_iter.rs:+2:9: +2:10
- StorageLive(_12); // scope 2 at $DIR/slice_iter.rs:+2:9: +2:13
- _12 = (_10,); // scope 2 at $DIR/slice_iter.rs:+2:9: +2:13
- _6 = <impl Fn(&T) as Fn<(&T,)>>::call(move _11, move _12) -> [return: bb6, unwind: bb8]; // scope 2 at $DIR/slice_iter.rs:+2:9: +2:13
+ _9 = ((_6 as Some).0: &T); // scope 1 at $DIR/slice_iter.rs:+1:9: +1:10
+ StorageLive(_10); // scope 2 at $DIR/slice_iter.rs:+2:9: +2:10
+ _10 = &_2; // scope 2 at $DIR/slice_iter.rs:+2:9: +2:10
+ StorageLive(_11); // scope 2 at $DIR/slice_iter.rs:+2:9: +2:13
+ _11 = (_9,); // scope 2 at $DIR/slice_iter.rs:+2:9: +2:13
+ _5 = <impl Fn(&T) as Fn<(&T,)>>::call(move _10, move _11) -> [return: bb6, unwind: bb8]; // scope 2 at $DIR/slice_iter.rs:+2:9: +2:13
// mir::Constant
// + span: $DIR/slice_iter.rs:29:9: 29:10
// + literal: Const { ty: for<'a> extern "rust-call" fn(&'a impl Fn(&T), (&T,)) -> <impl Fn(&T) as FnOnce<(&T,)>>::Output {<impl Fn(&T) as Fn<(&T,)>>::call}, val: Value(<ZST>) }
@@ -68,16 +130,15 @@ fn forward_loop(_1: &[T], _2: impl Fn(&T)) -> () {
}
bb5: {
- StorageDead(_7); // scope 1 at $DIR/slice_iter.rs:+3:5: +3:6
- StorageDead(_5); // scope 0 at $DIR/slice_iter.rs:+3:5: +3:6
- StorageDead(_3); // scope 0 at $DIR/slice_iter.rs:+3:5: +3:6
+ StorageDead(_6); // scope 1 at $DIR/slice_iter.rs:+3:5: +3:6
+ StorageDead(_4); // scope 0 at $DIR/slice_iter.rs:+3:5: +3:6
drop(_2) -> bb7; // scope 0 at $DIR/slice_iter.rs:+4:1: +4:2
}
bb6: {
- StorageDead(_12); // scope 2 at $DIR/slice_iter.rs:+2:12: +2:13
StorageDead(_11); // scope 2 at $DIR/slice_iter.rs:+2:12: +2:13
- StorageDead(_7); // scope 1 at $DIR/slice_iter.rs:+3:5: +3:6
+ StorageDead(_10); // scope 2 at $DIR/slice_iter.rs:+2:12: +2:13
+ StorageDead(_6); // scope 1 at $DIR/slice_iter.rs:+3:5: +3:6
goto -> bb1; // scope 1 at $DIR/slice_iter.rs:+1:5: +3:6
}
@@ -94,10 +155,49 @@ fn forward_loop(_1: &[T], _2: impl Fn(&T)) -> () {
}
bb10: {
- _3 = move _4; // scope 4 at $SRC_DIR/core/src/iter/traits/collect.rs:LL:COL
- StorageDead(_4); // scope 0 at $DIR/slice_iter.rs:+1:25: +1:26
- StorageLive(_5); // scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
- _5 = move _3; // scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
+ StorageLive(_15); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _15 = Len((*_1)); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _13 = _15 as *const T (Transmute); // scope 10 at $SRC_DIR/core/src/ptr/mod.rs:LL:COL
+ StorageDead(_15); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ goto -> bb12; // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ }
+
+ bb11: {
+ StorageLive(_16); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _16 = Len((*_1)); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _13 = Offset(_12, _16); // scope 12 at $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
+ StorageDead(_16); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ goto -> bb12; // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ }
+
+ bb12: {
+ StorageDead(_14); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageLive(_17); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageLive(_18); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _18 = _12 as *mut T (PtrToPtr); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageLive(_21); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageLive(_22); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageLive(_23); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _21 = _18 as *const T (Pointer(MutToConstPointer)); // scope 14 at $SRC_DIR/core/src/ptr/non_null.rs:LL:COL
+ _17 = NonNull::<T> { pointer: _21 }; // scope 14 at $SRC_DIR/core/src/ptr/non_null.rs:LL:COL
+ StorageDead(_23); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageDead(_22); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageDead(_21); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageDead(_18); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageLive(_19); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _19 = _13; // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _3 = std::slice::Iter::<'_, T> { ptr: move _17, end: move _19, _marker: const ZeroSized: PhantomData<&T> }; // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ // mir::Constant
+ // + span: no-location
+ // + literal: Const { ty: PhantomData<&T>, val: Value(<ZST>) }
+ // adt
+ // + user_ty: UserType(1)
+ StorageDead(_19); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageDead(_17); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageDead(_13); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageDead(_12); // scope 3 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ StorageLive(_4); // scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
+ _4 = move _3; // scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
goto -> bb1; // scope 1 at $DIR/slice_iter.rs:+1:5: +3:6
}
}
diff --git a/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.mir b/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.mir
index 62dd9667d96..45b41b54c8b 100644
--- a/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.mir
+++ b/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.mir
@@ -19,39 +19,104 @@ fn reverse_loop(_1: &[T], _2: impl Fn(&T)) -> () {
scope 2 {
debug x => _10; // in scope 2 at $DIR/slice_iter.rs:+1:9: +1:10
}
- scope 7 (inlined <Rev<std::slice::Iter<'_, T>> as Iterator>::next) { // at $DIR/slice_iter.rs:35:14: 35:32
- debug self => _8; // in scope 7 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
- let mut _13: &mut std::slice::Iter<'_, T>; // in scope 7 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
+ scope 25 (inlined <Rev<std::slice::Iter<'_, T>> as Iterator>::next) { // at $DIR/slice_iter.rs:35:14: 35:32
+ debug self => _8; // in scope 25 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
+ let mut _25: &mut std::slice::Iter<'_, T>; // in scope 25 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
}
}
scope 3 (inlined core::slice::<impl [T]>::iter) { // at $DIR/slice_iter.rs:35:20: 35:26
debug self => _1; // in scope 3 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
- }
- scope 4 (inlined <std::slice::Iter<'_, T> as Iterator>::rev) { // at $DIR/slice_iter.rs:35:27: 35:32
- debug self => _4; // in scope 4 at $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
- scope 5 (inlined Rev::<std::slice::Iter<'_, T>>::new) { // at $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
- debug iter => _4; // in scope 5 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
+ scope 4 (inlined std::slice::Iter::<'_, T>::new) { // at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ debug slice => _1; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ let _13: *const T; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ let mut _15: bool; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ let mut _16: usize; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ let mut _17: usize; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ let mut _18: std::ptr::NonNull<T>; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ let mut _19: *mut T; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ let mut _20: *const T; // in scope 4 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ scope 5 {
+ debug ptr => _13; // in scope 5 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ scope 6 {
+ let _14: *const T; // in scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ scope 7 {
+ debug end => _14; // in scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ scope 13 (inlined NonNull::<T>::new_unchecked) { // at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ debug ptr => _19; // in scope 13 at $SRC_DIR/core/src/ptr/non_null.rs:LL:COL
+ let mut _22: *const T; // in scope 13 at $SRC_DIR/core/src/ptr/non_null.rs:LL:COL
+ let mut _23: *mut T; // in scope 13 at $SRC_DIR/core/src/intrinsics.rs:LL:COL
+ scope 14 {
+ scope 15 (inlined NonNull::<T>::new_unchecked::runtime::<T>) { // at $SRC_DIR/core/src/intrinsics.rs:LL:COL
+ debug ptr => _23; // in scope 15 at $SRC_DIR/core/src/intrinsics.rs:LL:COL
+ scope 16 (inlined ptr::mut_ptr::<impl *mut T>::is_null) { // at $SRC_DIR/core/src/ptr/non_null.rs:LL:COL
+ debug self => _23; // in scope 16 at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ let mut _24: *mut u8; // in scope 16 at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ scope 17 {
+ scope 18 (inlined ptr::mut_ptr::<impl *mut T>::is_null::runtime_impl) { // at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ debug ptr => _24; // in scope 18 at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ scope 19 (inlined ptr::mut_ptr::<impl *mut u8>::addr) { // at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ debug self => _24; // in scope 19 at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ scope 20 {
+ scope 21 (inlined ptr::mut_ptr::<impl *mut u8>::cast::<()>) { // at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ debug self => _24; // in scope 21 at $SRC_DIR/core/src/ptr/mut_ptr.rs:LL:COL
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ scope 9 (inlined invalid::<T>) { // at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ debug addr => _16; // in scope 9 at $SRC_DIR/core/src/ptr/mod.rs:LL:COL
+ scope 10 {
+ }
+ }
+ scope 11 (inlined ptr::const_ptr::<impl *const T>::add) { // at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ debug self => _13; // in scope 11 at $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
+ debug count => _17; // in scope 11 at $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
+ scope 12 {
+ }
+ }
+ }
+ }
+ scope 8 (inlined core::slice::<impl [T]>::as_ptr) { // at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ debug self => _1; // in scope 8 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ let mut _21: *const [T]; // in scope 8 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ }
}
}
- scope 6 (inlined <Rev<std::slice::Iter<'_, T>> as IntoIterator>::into_iter) { // at $DIR/slice_iter.rs:35:14: 35:32
- debug self => _3; // in scope 6 at $SRC_DIR/core/src/iter/traits/collect.rs:LL:COL
+ scope 22 (inlined <std::slice::Iter<'_, T> as Iterator>::rev) { // at $DIR/slice_iter.rs:35:27: 35:32
+ debug self => _4; // in scope 22 at $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
+ scope 23 (inlined Rev::<std::slice::Iter<'_, T>>::new) { // at $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
+ debug iter => _4; // in scope 23 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
+ }
+ }
+ scope 24 (inlined <Rev<std::slice::Iter<'_, T>> as IntoIterator>::into_iter) { // at $DIR/slice_iter.rs:35:14: 35:32
+ debug self => _3; // in scope 24 at $SRC_DIR/core/src/iter/traits/collect.rs:LL:COL
}
bb0: {
StorageLive(_4); // scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
- _4 = std::slice::Iter::<'_, T>::new(_1) -> [return: bb9, unwind: bb7]; // scope 3 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
- // mir::Constant
- // + span: $SRC_DIR/core/src/slice/mod.rs:LL:COL
- // + user_ty: UserType(0)
- // + literal: Const { ty: fn(&[T]) -> std::slice::Iter<'_, T> {std::slice::Iter::<'_, T>::new}, val: Value(<ZST>) }
+ StorageLive(_13); // scope 3 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ StorageLive(_21); // scope 8 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ _21 = &raw const (*_1); // scope 8 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ _13 = move _21 as *const T (PtrToPtr); // scope 8 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ StorageDead(_21); // scope 8 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ StorageLive(_14); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageLive(_15); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _15 = const _; // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ switchInt(move _15) -> [0: bb10, otherwise: bb9]; // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
}
bb1: {
StorageLive(_7); // scope 1 at $DIR/slice_iter.rs:+1:14: +1:32
_8 = &mut _5; // scope 1 at $DIR/slice_iter.rs:+1:14: +1:32
- StorageLive(_13); // scope 7 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
- _13 = &mut ((*_8).0: std::slice::Iter<'_, T>); // scope 7 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
- _7 = <std::slice::Iter<'_, T> as DoubleEndedIterator>::next_back(move _13) -> [return: bb10, unwind: bb7]; // scope 7 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
+ StorageLive(_25); // scope 25 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
+ _25 = &mut ((*_8).0: std::slice::Iter<'_, T>); // scope 25 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
+ _7 = <std::slice::Iter<'_, T> as DoubleEndedIterator>::next_back(move _25) -> [return: bb12, unwind: bb7]; // scope 25 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
// mir::Constant
// + span: $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
// + literal: Const { ty: for<'a> fn(&'a mut std::slice::Iter<'_, T>) -> Option<<std::slice::Iter<'_, T> as Iterator>::Item> {<std::slice::Iter<'_, T> as DoubleEndedIterator>::next_back}, val: Value(<ZST>) }
@@ -99,15 +164,56 @@ fn reverse_loop(_1: &[T], _2: impl Fn(&T)) -> () {
}
bb9: {
- _3 = Rev::<std::slice::Iter<'_, T>> { iter: move _4 }; // scope 5 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
+ StorageLive(_16); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _16 = Len((*_1)); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _14 = _16 as *const T (Transmute); // scope 10 at $SRC_DIR/core/src/ptr/mod.rs:LL:COL
+ StorageDead(_16); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ goto -> bb11; // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ }
+
+ bb10: {
+ StorageLive(_17); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _17 = Len((*_1)); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _14 = Offset(_13, _17); // scope 12 at $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL
+ StorageDead(_17); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ goto -> bb11; // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ }
+
+ bb11: {
+ StorageDead(_15); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageLive(_18); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageLive(_19); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _19 = _13 as *mut T (PtrToPtr); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageLive(_22); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageLive(_23); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageLive(_24); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _22 = _19 as *const T (Pointer(MutToConstPointer)); // scope 14 at $SRC_DIR/core/src/ptr/non_null.rs:LL:COL
+ _18 = NonNull::<T> { pointer: _22 }; // scope 14 at $SRC_DIR/core/src/ptr/non_null.rs:LL:COL
+ StorageDead(_24); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageDead(_23); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageDead(_22); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageDead(_19); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageLive(_20); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _20 = _14; // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ _4 = std::slice::Iter::<'_, T> { ptr: move _18, end: move _20, _marker: const ZeroSized: PhantomData<&T> }; // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ // mir::Constant
+ // + span: no-location
+ // + literal: Const { ty: PhantomData<&T>, val: Value(<ZST>) }
+ // adt
+ // + user_ty: UserType(1)
+ StorageDead(_20); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageDead(_18); // scope 7 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageDead(_14); // scope 6 at $SRC_DIR/core/src/slice/iter.rs:LL:COL
+ StorageDead(_13); // scope 3 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
+ _3 = Rev::<std::slice::Iter<'_, T>> { iter: move _4 }; // scope 23 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
StorageDead(_4); // scope 0 at $DIR/slice_iter.rs:+1:31: +1:32
StorageLive(_5); // scope 0 at $DIR/slice_iter.rs:+1:14: +1:32
_5 = move _3; // scope 0 at $DIR/slice_iter.rs:+1:14: +1:32
goto -> bb1; // scope 1 at $DIR/slice_iter.rs:+1:5: +3:6
}
- bb10: {
- StorageDead(_13); // scope 7 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
+ bb12: {
+ StorageDead(_25); // scope 25 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
_9 = discriminant(_7); // scope 1 at $DIR/slice_iter.rs:+1:14: +1:32
switchInt(move _9) -> [0: bb4, 1: bb2, otherwise: bb3]; // scope 1 at $DIR/slice_iter.rs:+1:14: +1:32
}