diff --git a/library/core/src/ptr/const_ptr.rs b/library/core/src/ptr/const_ptr.rs index 332c5e904d7..4727dc77d18 100644 --- a/library/core/src/ptr/const_ptr.rs +++ b/library/core/src/ptr/const_ptr.rs @@ -395,6 +395,36 @@ pub const fn to_raw_parts(self) -> (*const (), ::Metadata) where T: Sized, { + #[inline] + const fn runtime_offset_nowrap(this: *const (), count: isize, size: usize) -> bool { + #[inline] + fn runtime(this: *const (), count: isize, size: usize) -> bool { + // We know `size <= isize::MAX` so the `as` cast here is not lossy. + let Some(byte_offset) = count.checked_mul(size as isize) else { + return false; + }; + let (_, overflow) = this.addr().overflowing_add_signed(byte_offset); + !overflow + } + + const fn comptime(_: *const (), _: isize, _: usize) -> bool { + true + } + + // We can use const_eval_select here because this is only for UB checks. + intrinsics::const_eval_select((this, count, size), comptime, runtime) + } + + ub_checks::assert_unsafe_precondition!( + check_language_ub, + "ptr::offset requires the address calculation to not overflow", + ( + this: *const () = self as *const (), + count: isize = count, + size: usize = size_of::(), + ) => runtime_offset_nowrap(this, count, size) + ); + // SAFETY: the caller must uphold the safety contract for `offset`. unsafe { intrinsics::offset(self, count) } } @@ -726,7 +756,6 @@ const fn comptime(_: *const (), _: *const ()) -> bool { true } - #[allow(unused_unsafe)] intrinsics::const_eval_select((this, origin), comptime, runtime) } @@ -858,6 +887,34 @@ pub const fn guaranteed_ne(self, other: *const T) -> Option where T: Sized, { + #[inline] + const fn runtime_add_nowrap(this: *const (), count: usize, size: usize) -> bool { + #[inline] + fn runtime(this: *const (), count: usize, size: usize) -> bool { + let Some(byte_offset) = count.checked_mul(size) else { + return false; + }; + let (_, overflow) = this.addr().overflowing_add(byte_offset); + byte_offset <= (isize::MAX as usize) && !overflow + } + + const fn comptime(_: *const (), _: usize, _: usize) -> bool { + true + } + + intrinsics::const_eval_select((this, count, size), comptime, runtime) + } + + ub_checks::assert_unsafe_precondition!( + check_language_ub, + "ptr::add requires that the address calculation does not overflow", + ( + this: *const () = self as *const (), + count: usize = count, + size: usize = size_of::(), + ) => runtime_add_nowrap(this, count, size) + ); + // SAFETY: the caller must uphold the safety contract for `offset`. unsafe { intrinsics::offset(self, count) } } @@ -936,6 +993,33 @@ pub const fn guaranteed_ne(self, other: *const T) -> Option where T: Sized, { + #[inline] + const fn runtime_sub_nowrap(this: *const (), count: usize, size: usize) -> bool { + #[inline] + fn runtime(this: *const (), count: usize, size: usize) -> bool { + let Some(byte_offset) = count.checked_mul(size) else { + return false; + }; + byte_offset <= (isize::MAX as usize) && this.addr() >= byte_offset + } + + const fn comptime(_: *const (), _: usize, _: usize) -> bool { + true + } + + intrinsics::const_eval_select((this, count, size), comptime, runtime) + } + + ub_checks::assert_unsafe_precondition!( + check_language_ub, + "ptr::sub requires that the address calculation does not overflow", + ( + this: *const () = self as *const (), + count: usize = count, + size: usize = size_of::(), + ) => runtime_sub_nowrap(this, count, size) + ); + if T::IS_ZST { // Pointer arithmetic does nothing when the pointee is a ZST. self @@ -943,7 +1027,7 @@ pub const fn guaranteed_ne(self, other: *const T) -> Option // SAFETY: the caller must uphold the safety contract for `offset`. // Because the pointee is *not* a ZST, that means that `count` is // at most `isize::MAX`, and thus the negation cannot overflow. - unsafe { self.offset((count as isize).unchecked_neg()) } + unsafe { intrinsics::offset(self, intrinsics::unchecked_sub(0, count as isize)) } } } diff --git a/library/core/src/ptr/mut_ptr.rs b/library/core/src/ptr/mut_ptr.rs index 287073497f8..8dbce1fdb98 100644 --- a/library/core/src/ptr/mut_ptr.rs +++ b/library/core/src/ptr/mut_ptr.rs @@ -393,6 +393,37 @@ pub const fn to_raw_parts(self) -> (*mut (), ::Metadata) { where T: Sized, { + #[inline] + const fn runtime_offset_nowrap(this: *const (), count: isize, size: usize) -> bool { + #[inline] + fn runtime(this: *const (), count: isize, size: usize) -> bool { + // `size` is the size of a Rust type, so we know that + // `size <= isize::MAX` and thus `as` cast here is not lossy. + let Some(byte_offset) = count.checked_mul(size as isize) else { + return false; + }; + let (_, overflow) = this.addr().overflowing_add_signed(byte_offset); + !overflow + } + + const fn comptime(_: *const (), _: isize, _: usize) -> bool { + true + } + + // We can use const_eval_select here because this is only for UB checks. + intrinsics::const_eval_select((this, count, size), comptime, runtime) + } + + ub_checks::assert_unsafe_precondition!( + check_language_ub, + "ptr::offset requires the address calculation to not overflow", + ( + this: *const () = self as *const (), + count: isize = count, + size: usize = size_of::(), + ) => runtime_offset_nowrap(this, count, size) + ); + // SAFETY: the caller must uphold the safety contract for `offset`. // The obtained pointer is valid for writes since the caller must // guarantee that it points to the same allocated object as `self`. @@ -940,6 +971,34 @@ pub const fn guaranteed_ne(self, other: *mut T) -> Option where T: Sized, { + #[inline] + const fn runtime_add_nowrap(this: *const (), count: usize, size: usize) -> bool { + #[inline] + fn runtime(this: *const (), count: usize, size: usize) -> bool { + let Some(byte_offset) = count.checked_mul(size) else { + return false; + }; + let (_, overflow) = this.addr().overflowing_add(byte_offset); + byte_offset <= (isize::MAX as usize) && !overflow + } + + const fn comptime(_: *const (), _: usize, _: usize) -> bool { + true + } + + intrinsics::const_eval_select((this, count, size), comptime, runtime) + } + + ub_checks::assert_unsafe_precondition!( + check_language_ub, + "ptr::add requires that the address calculation does not overflow", + ( + this: *const () = self as *const (), + count: usize = count, + size: usize = size_of::(), + ) => runtime_add_nowrap(this, count, size) + ); + // SAFETY: the caller must uphold the safety contract for `offset`. unsafe { intrinsics::offset(self, count) } } @@ -1018,6 +1077,33 @@ pub const fn guaranteed_ne(self, other: *mut T) -> Option where T: Sized, { + #[inline] + const fn runtime_sub_nowrap(this: *const (), count: usize, size: usize) -> bool { + #[inline] + fn runtime(this: *const (), count: usize, size: usize) -> bool { + let Some(byte_offset) = count.checked_mul(size) else { + return false; + }; + byte_offset <= (isize::MAX as usize) && this.addr() >= byte_offset + } + + const fn comptime(_: *const (), _: usize, _: usize) -> bool { + true + } + + intrinsics::const_eval_select((this, count, size), comptime, runtime) + } + + ub_checks::assert_unsafe_precondition!( + check_language_ub, + "ptr::sub requires that the address calculation does not overflow", + ( + this: *const () = self as *const (), + count: usize = count, + size: usize = size_of::(), + ) => runtime_sub_nowrap(this, count, size) + ); + if T::IS_ZST { // Pointer arithmetic does nothing when the pointee is a ZST. self @@ -1025,7 +1111,7 @@ pub const fn guaranteed_ne(self, other: *mut T) -> Option // SAFETY: the caller must uphold the safety contract for `offset`. // Because the pointee is *not* a ZST, that means that `count` is // at most `isize::MAX`, and thus the negation cannot overflow. - unsafe { self.offset((count as isize).unchecked_neg()) } + unsafe { intrinsics::offset(self, intrinsics::unchecked_sub(0, count as isize)) } } } diff --git a/tests/codegen/option-as-slice.rs b/tests/codegen/option-as-slice.rs index cfa479aa4b2..0edbbac1176 100644 --- a/tests/codegen/option-as-slice.rs +++ b/tests/codegen/option-as-slice.rs @@ -14,7 +14,9 @@ pub fn u64_opt_as_slice(o: &Option) -> &[u64] { // CHECK-NOT: br // CHECK-NOT: switch // CHECK-NOT: icmp - // CHECK: %[[LEN:.+]] = load i64,{{.+}} !range ![[META_U64:.+]], !noundef + // CHECK: %[[LEN:.+]] = load i64 + // CHECK-SAME: !range ![[META_U64:[0-9]+]], + // CHECK-SAME: !noundef // CHECK-NOT: select // CHECK-NOT: br // CHECK-NOT: switch @@ -51,7 +53,9 @@ pub fn u8_opt_as_slice(o: &Option) -> &[u8] { // CHECK-NOT: br // CHECK-NOT: switch // CHECK-NOT: icmp - // CHECK: %[[TAG:.+]] = load i8,{{.+}} !range ![[META_U8:.+]], !noundef + // CHECK: %[[TAG:.+]] = load i8 + // CHECK-SAME: !range ![[META_U8:[0-9]+]], + // CHECK-SAME: !noundef // CHECK: %[[LEN:.+]] = zext{{.*}} i8 %[[TAG]] to i64 // CHECK-NOT: select // CHECK-NOT: br diff --git a/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_fat.PreCodegen.after.panic-abort.mir b/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_fat.PreCodegen.after.panic-abort.mir index 5faa1e210cf..c99c6f7de88 100644 --- a/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_fat.PreCodegen.after.panic-abort.mir +++ b/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_fat.PreCodegen.after.panic-abort.mir @@ -10,12 +10,18 @@ fn demo_byte_add_fat(_1: *const [u32], _2: usize) -> *const [u32] { scope 2 (inlined std::ptr::const_ptr::::cast::) { } scope 3 (inlined std::ptr::const_ptr::::add) { - } - scope 4 (inlined std::ptr::const_ptr::::with_metadata_of::<[u32]>) { - let mut _5: usize; - scope 5 (inlined std::ptr::metadata::<[u32]>) { + scope 4 (inlined core::ub_checks::check_language_ub) { + scope 5 (inlined core::ub_checks::check_language_ub::runtime) { + } } - scope 6 (inlined std::ptr::from_raw_parts::<[u32], ()>) { + scope 6 (inlined std::mem::size_of::) { + } + } + scope 7 (inlined std::ptr::const_ptr::::with_metadata_of::<[u32]>) { + let mut _5: usize; + scope 8 (inlined std::ptr::metadata::<[u32]>) { + } + scope 9 (inlined std::ptr::from_raw_parts::<[u32], ()>) { } } } diff --git a/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_fat.PreCodegen.after.panic-unwind.mir b/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_fat.PreCodegen.after.panic-unwind.mir index 5faa1e210cf..c99c6f7de88 100644 --- a/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_fat.PreCodegen.after.panic-unwind.mir +++ b/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_fat.PreCodegen.after.panic-unwind.mir @@ -10,12 +10,18 @@ fn demo_byte_add_fat(_1: *const [u32], _2: usize) -> *const [u32] { scope 2 (inlined std::ptr::const_ptr::::cast::) { } scope 3 (inlined std::ptr::const_ptr::::add) { - } - scope 4 (inlined std::ptr::const_ptr::::with_metadata_of::<[u32]>) { - let mut _5: usize; - scope 5 (inlined std::ptr::metadata::<[u32]>) { + scope 4 (inlined core::ub_checks::check_language_ub) { + scope 5 (inlined core::ub_checks::check_language_ub::runtime) { + } } - scope 6 (inlined std::ptr::from_raw_parts::<[u32], ()>) { + scope 6 (inlined std::mem::size_of::) { + } + } + scope 7 (inlined std::ptr::const_ptr::::with_metadata_of::<[u32]>) { + let mut _5: usize; + scope 8 (inlined std::ptr::metadata::<[u32]>) { + } + scope 9 (inlined std::ptr::from_raw_parts::<[u32], ()>) { } } } diff --git a/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_thin.PreCodegen.after.panic-abort.mir b/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_thin.PreCodegen.after.panic-abort.mir index 9429785045a..07665b2adc8 100644 --- a/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_thin.PreCodegen.after.panic-abort.mir +++ b/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_thin.PreCodegen.after.panic-abort.mir @@ -10,11 +10,17 @@ fn demo_byte_add_thin(_1: *const u32, _2: usize) -> *const u32 { scope 2 (inlined std::ptr::const_ptr::::cast::) { } scope 3 (inlined std::ptr::const_ptr::::add) { - } - scope 4 (inlined std::ptr::const_ptr::::with_metadata_of::) { - scope 5 (inlined std::ptr::metadata::) { + scope 4 (inlined core::ub_checks::check_language_ub) { + scope 5 (inlined core::ub_checks::check_language_ub::runtime) { + } } - scope 6 (inlined std::ptr::from_raw_parts::) { + scope 6 (inlined std::mem::size_of::) { + } + } + scope 7 (inlined std::ptr::const_ptr::::with_metadata_of::) { + scope 8 (inlined std::ptr::metadata::) { + } + scope 9 (inlined std::ptr::from_raw_parts::) { } } } diff --git a/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_thin.PreCodegen.after.panic-unwind.mir b/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_thin.PreCodegen.after.panic-unwind.mir index 9429785045a..07665b2adc8 100644 --- a/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_thin.PreCodegen.after.panic-unwind.mir +++ b/tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_thin.PreCodegen.after.panic-unwind.mir @@ -10,11 +10,17 @@ fn demo_byte_add_thin(_1: *const u32, _2: usize) -> *const u32 { scope 2 (inlined std::ptr::const_ptr::::cast::) { } scope 3 (inlined std::ptr::const_ptr::::add) { - } - scope 4 (inlined std::ptr::const_ptr::::with_metadata_of::) { - scope 5 (inlined std::ptr::metadata::) { + scope 4 (inlined core::ub_checks::check_language_ub) { + scope 5 (inlined core::ub_checks::check_language_ub::runtime) { + } } - scope 6 (inlined std::ptr::from_raw_parts::) { + scope 6 (inlined std::mem::size_of::) { + } + } + scope 7 (inlined std::ptr::const_ptr::::with_metadata_of::) { + scope 8 (inlined std::ptr::metadata::) { + } + scope 9 (inlined std::ptr::from_raw_parts::) { } } } diff --git a/tests/mir-opt/pre-codegen/slice_iter.enumerated_loop.PreCodegen.after.panic-abort.mir b/tests/mir-opt/pre-codegen/slice_iter.enumerated_loop.PreCodegen.after.panic-abort.mir index 3aa483ed1ae..da3295bf8c9 100644 --- a/tests/mir-opt/pre-codegen/slice_iter.enumerated_loop.PreCodegen.after.panic-abort.mir +++ b/tests/mir-opt/pre-codegen/slice_iter.enumerated_loop.PreCodegen.after.panic-abort.mir @@ -19,30 +19,30 @@ fn enumerated_loop(_1: &[T], _2: impl Fn(usize, &T)) -> () { debug i => _22; debug x => _23; } - scope 17 (inlined > as Iterator>::next) { + scope 20 (inlined > as Iterator>::next) { let mut _14: &mut std::slice::Iter<'_, T>; let mut _15: std::option::Option<&T>; let mut _19: (usize, bool); let mut _20: (usize, &T); - scope 18 { + scope 21 { let _18: usize; - scope 23 { + scope 26 { } } - scope 19 { - scope 20 { - scope 26 (inlined as FromResidual>>::from_residual) { + scope 22 { + scope 23 { + scope 29 (inlined as FromResidual>>::from_residual) { } } } - scope 21 { - scope 22 { + scope 24 { + scope 25 { } } - scope 24 (inlined as Try>::branch) { + scope 27 (inlined as Try>::branch) { let mut _16: isize; let _17: &T; - scope 25 { + scope 28 { } } } @@ -64,6 +64,12 @@ fn enumerated_loop(_1: &[T], _2: impl Fn(usize, &T)) -> () { scope 12 (inlined NonNull::::as_ptr) { } scope 13 (inlined std::ptr::mut_ptr::::add) { + scope 14 (inlined core::ub_checks::check_language_ub) { + scope 15 (inlined core::ub_checks::check_language_ub::runtime) { + } + } + scope 16 (inlined std::mem::size_of::) { + } } } scope 8 (inlined as From<&[T]>>::from) { @@ -77,11 +83,11 @@ fn enumerated_loop(_1: &[T], _2: impl Fn(usize, &T)) -> () { } } } - scope 14 (inlined as Iterator>::enumerate) { - scope 15 (inlined Enumerate::>::new) { + scope 17 (inlined as Iterator>::enumerate) { + scope 18 (inlined Enumerate::>::new) { } } - scope 16 (inlined > as IntoIterator>::into_iter) { + scope 19 (inlined > as IntoIterator>::into_iter) { } bb0: { diff --git a/tests/mir-opt/pre-codegen/slice_iter.enumerated_loop.PreCodegen.after.panic-unwind.mir b/tests/mir-opt/pre-codegen/slice_iter.enumerated_loop.PreCodegen.after.panic-unwind.mir index 4cc0aa0ed78..46c868ba8a1 100644 --- a/tests/mir-opt/pre-codegen/slice_iter.enumerated_loop.PreCodegen.after.panic-unwind.mir +++ b/tests/mir-opt/pre-codegen/slice_iter.enumerated_loop.PreCodegen.after.panic-unwind.mir @@ -39,6 +39,12 @@ fn enumerated_loop(_1: &[T], _2: impl Fn(usize, &T)) -> () { scope 12 (inlined NonNull::::as_ptr) { } scope 13 (inlined std::ptr::mut_ptr::::add) { + scope 14 (inlined core::ub_checks::check_language_ub) { + scope 15 (inlined core::ub_checks::check_language_ub::runtime) { + } + } + scope 16 (inlined std::mem::size_of::) { + } } } scope 8 (inlined as From<&[T]>>::from) { @@ -52,11 +58,11 @@ fn enumerated_loop(_1: &[T], _2: impl Fn(usize, &T)) -> () { } } } - scope 14 (inlined as Iterator>::enumerate) { - scope 15 (inlined Enumerate::>::new) { + scope 17 (inlined as Iterator>::enumerate) { + scope 18 (inlined Enumerate::>::new) { } } - scope 16 (inlined > as IntoIterator>::into_iter) { + scope 19 (inlined > as IntoIterator>::into_iter) { } bb0: { diff --git a/tests/mir-opt/pre-codegen/slice_iter.forward_loop.PreCodegen.after.panic-abort.mir b/tests/mir-opt/pre-codegen/slice_iter.forward_loop.PreCodegen.after.panic-abort.mir index 507afa63c68..cedda097c38 100644 --- a/tests/mir-opt/pre-codegen/slice_iter.forward_loop.PreCodegen.after.panic-abort.mir +++ b/tests/mir-opt/pre-codegen/slice_iter.forward_loop.PreCodegen.after.panic-abort.mir @@ -36,6 +36,12 @@ fn forward_loop(_1: &[T], _2: impl Fn(&T)) -> () { scope 12 (inlined NonNull::::as_ptr) { } scope 13 (inlined std::ptr::mut_ptr::::add) { + scope 14 (inlined core::ub_checks::check_language_ub) { + scope 15 (inlined core::ub_checks::check_language_ub::runtime) { + } + } + scope 16 (inlined std::mem::size_of::) { + } } } scope 8 (inlined as From<&[T]>>::from) { @@ -49,7 +55,7 @@ fn forward_loop(_1: &[T], _2: impl Fn(&T)) -> () { } } } - scope 14 (inlined as IntoIterator>::into_iter) { + scope 17 (inlined as IntoIterator>::into_iter) { } bb0: { diff --git a/tests/mir-opt/pre-codegen/slice_iter.forward_loop.PreCodegen.after.panic-unwind.mir b/tests/mir-opt/pre-codegen/slice_iter.forward_loop.PreCodegen.after.panic-unwind.mir index a25f12edc28..e299760d982 100644 --- a/tests/mir-opt/pre-codegen/slice_iter.forward_loop.PreCodegen.after.panic-unwind.mir +++ b/tests/mir-opt/pre-codegen/slice_iter.forward_loop.PreCodegen.after.panic-unwind.mir @@ -36,6 +36,12 @@ fn forward_loop(_1: &[T], _2: impl Fn(&T)) -> () { scope 12 (inlined NonNull::::as_ptr) { } scope 13 (inlined std::ptr::mut_ptr::::add) { + scope 14 (inlined core::ub_checks::check_language_ub) { + scope 15 (inlined core::ub_checks::check_language_ub::runtime) { + } + } + scope 16 (inlined std::mem::size_of::) { + } } } scope 8 (inlined as From<&[T]>>::from) { @@ -49,7 +55,7 @@ fn forward_loop(_1: &[T], _2: impl Fn(&T)) -> () { } } } - scope 14 (inlined as IntoIterator>::into_iter) { + scope 17 (inlined as IntoIterator>::into_iter) { } bb0: { diff --git a/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.panic-abort.mir b/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.panic-abort.mir index 1b397a4e4cd..d01bd4a9a4a 100644 --- a/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.panic-abort.mir +++ b/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.panic-abort.mir @@ -18,7 +18,7 @@ fn reverse_loop(_1: &[T], _2: impl Fn(&T)) -> () { scope 2 { debug x => _17; } - scope 17 (inlined > as Iterator>::next) { + scope 20 (inlined > as Iterator>::next) { let mut _14: &mut std::slice::Iter<'_, T>; } } @@ -39,6 +39,12 @@ fn reverse_loop(_1: &[T], _2: impl Fn(&T)) -> () { scope 12 (inlined NonNull::::as_ptr) { } scope 13 (inlined std::ptr::mut_ptr::::add) { + scope 14 (inlined core::ub_checks::check_language_ub) { + scope 15 (inlined core::ub_checks::check_language_ub::runtime) { + } + } + scope 16 (inlined std::mem::size_of::) { + } } } scope 8 (inlined as From<&[T]>>::from) { @@ -52,11 +58,11 @@ fn reverse_loop(_1: &[T], _2: impl Fn(&T)) -> () { } } } - scope 14 (inlined as Iterator>::rev) { - scope 15 (inlined Rev::>::new) { + scope 17 (inlined as Iterator>::rev) { + scope 18 (inlined Rev::>::new) { } } - scope 16 (inlined > as IntoIterator>::into_iter) { + scope 19 (inlined > as IntoIterator>::into_iter) { } bb0: { diff --git a/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.panic-unwind.mir b/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.panic-unwind.mir index 77689dd9b51..d2d0492add4 100644 --- a/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.panic-unwind.mir +++ b/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.panic-unwind.mir @@ -18,7 +18,7 @@ fn reverse_loop(_1: &[T], _2: impl Fn(&T)) -> () { scope 2 { debug x => _17; } - scope 17 (inlined > as Iterator>::next) { + scope 20 (inlined > as Iterator>::next) { let mut _14: &mut std::slice::Iter<'_, T>; } } @@ -39,6 +39,12 @@ fn reverse_loop(_1: &[T], _2: impl Fn(&T)) -> () { scope 12 (inlined NonNull::::as_ptr) { } scope 13 (inlined std::ptr::mut_ptr::::add) { + scope 14 (inlined core::ub_checks::check_language_ub) { + scope 15 (inlined core::ub_checks::check_language_ub::runtime) { + } + } + scope 16 (inlined std::mem::size_of::) { + } } } scope 8 (inlined as From<&[T]>>::from) { @@ -52,11 +58,11 @@ fn reverse_loop(_1: &[T], _2: impl Fn(&T)) -> () { } } } - scope 14 (inlined as Iterator>::rev) { - scope 15 (inlined Rev::>::new) { + scope 17 (inlined as Iterator>::rev) { + scope 18 (inlined Rev::>::new) { } } - scope 16 (inlined > as IntoIterator>::into_iter) { + scope 19 (inlined > as IntoIterator>::into_iter) { } bb0: {