// MIR for `reverse_loop` after PreCodegen

fn reverse_loop(_1: &[T], _2: impl Fn(&T)) -> () {
    debug slice => _1;                   // in scope 0 at $DIR/slice_iter.rs:+0:28: +0:33
    debug f => _2;                       // in scope 0 at $DIR/slice_iter.rs:+0:44: +0:45
    let mut _0: ();                      // return place in scope 0 at $DIR/slice_iter.rs:+0:60: +0:60
    let mut _3: std::iter::Rev<std::slice::Iter<'_, T>>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:32
    let mut _4: std::slice::Iter<'_, T>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
    let mut _5: std::iter::Rev<std::slice::Iter<'_, T>>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:32
    let _6: ();                          // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:32
    let mut _7: std::option::Option<&T>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:32
    let mut _8: &mut std::iter::Rev<std::slice::Iter<'_, T>>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:32
    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
    scope 1 {
        debug iter => _5;                // in scope 1 at $DIR/slice_iter.rs:+1:14: +1:32
        let _10: &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
        }
        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>::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 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
        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(_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>) }
    }

    bb2: {
        _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: bb5, unwind: bb7]; // scope 2 at $DIR/slice_iter.rs:+2:9: +2:13
                                         // mir::Constant
                                         // + span: $DIR/slice_iter.rs:36:9: 36:10
                                         // + 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>) }
    }

    bb3: {
        unreachable;                     // scope 1 at $DIR/slice_iter.rs:+1:14: +1:32
    }

    bb4: {
        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
        drop(_2) -> bb6;                 // scope 0 at $DIR/slice_iter.rs:+4:1: +4:2
    }

    bb5: {
        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
        goto -> bb1;                     // scope 1 at $DIR/slice_iter.rs:+1:5: +3:6
    }

    bb6: {
        return;                          // scope 0 at $DIR/slice_iter.rs:+4:2: +4:2
    }

    bb7 (cleanup): {
        drop(_2) -> [return: bb8, unwind terminate]; // scope 0 at $DIR/slice_iter.rs:+4:1: +4:2
    }

    bb8 (cleanup): {
        resume;                          // scope 0 at $DIR/slice_iter.rs:+0:1: +4:2
    }

    bb9: {
        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
    }

    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
    }
}