tests/mir-opt/pre-codegen/slice_iter.enumerated_loop.PreCodegen.after.panic-abort.mir

// MIR for `enumerated_loop` after PreCodegen

fn enumerated_loop(_1: &[T], _2: impl Fn(usize, &T)) -> () {
    debug slice => _1;
    debug f => _2;
    let mut _0: ();
    let mut _10: usize;
    let mut _28: std::option::Option<(usize, &T)>;
    let mut _31: &impl Fn(usize, &T);
    let mut _32: (usize, &T);
    let _33: ();
    scope 1 {
        debug (((iter: Enumerate<std::slice::Iter<'_, T>>).0: std::slice::Iter<'_, T>).0: std::ptr::NonNull<T>) => _6;
        debug (((iter: Enumerate<std::slice::Iter<'_, T>>).0: std::slice::Iter<'_, T>).1: *const T) => _9;
        debug (((iter: Enumerate<std::slice::Iter<'_, T>>).0: std::slice::Iter<'_, T>).2: std::marker::PhantomData<&T>) => const ZeroSized: PhantomData<&T>;
        debug ((iter: Enumerate<std::slice::Iter<'_, T>>).1: usize) => _10;
        let _29: usize;
        let _30: &T;
        scope 2 {
            debug i => _29;
            debug x => _30;
        }
        scope 18 (inlined <Enumerate<std::slice::Iter<'_, T>> as Iterator>::next) {
            let mut _23: std::option::Option<&T>;
            let mut _26: (usize, bool);
            let mut _27: (usize, &T);
            scope 19 {
                let _25: usize;
                scope 24 {
                }
            }
            scope 20 {
                scope 21 {
                    scope 27 (inlined <Option<(usize, &T)> as FromResidual<Option<Infallible>>>::from_residual) {
                    }
                }
            }
            scope 22 {
                scope 23 {
                }
            }
            scope 25 (inlined <Option<&T> as Try>::branch) {
                let _24: &T;
                scope 26 {
                }
            }
            scope 28 (inlined <std::slice::Iter<'_, T> as Iterator>::next) {
                let mut _6: std::ptr::NonNull<T>;
                let _11: std::ptr::NonNull<T>;
                let _13: std::ptr::NonNull<T>;
                let mut _16: bool;
                let mut _20: usize;
                let _22: &T;
                scope 29 {
                    let _12: *const T;
                    scope 30 {
                        let _19: usize;
                        scope 31 {
                            scope 34 (inlined #[track_caller] core::num::<impl usize>::unchecked_sub) {
                                scope 35 (inlined core::ub_checks::check_language_ub) {
                                    scope 36 (inlined core::ub_checks::check_language_ub::runtime) {
                                    }
                                }
                            }
                            scope 37 (inlined without_provenance_mut::<T>) {
                            }
                        }
                        scope 32 (inlined std::ptr::const_ptr::<impl *const T>::addr) {
                            scope 33 (inlined std::ptr::const_ptr::<impl *const T>::cast::<()>) {
                            }
                        }
                        scope 38 (inlined <NonNull<T> as PartialEq>::eq) {
                            let mut _14: *mut T;
                            let mut _15: *mut T;
                            scope 39 (inlined NonNull::<T>::as_ptr) {
                            }
                            scope 40 (inlined NonNull::<T>::as_ptr) {
                            }
                        }
                        scope 41 (inlined NonNull::<T>::add) {
                            let mut _17: *const T;
                            let mut _18: *const T;
                            scope 42 (inlined NonNull::<T>::as_ptr) {
                            }
                        }
                        scope 43 (inlined NonNull::<T>::as_ref::<'_>) {
                            let _21: *const T;
                            scope 44 (inlined NonNull::<T>::as_ptr) {
                            }
                            scope 45 (inlined std::ptr::mut_ptr::<impl *mut T>::cast_const) {
                            }
                        }
                    }
                }
            }
        }
    }
    scope 3 (inlined core::slice::<impl [T]>::iter) {
        scope 4 (inlined std::slice::Iter::<'_, T>::new) {
            let _3: usize;
            let mut _7: *mut T;
            let mut _8: *mut T;
            scope 5 {
                scope 6 {
                    let _9: *const T;
                    scope 7 {
                    }
                    scope 11 (inlined std::ptr::without_provenance::<T>) {
                        scope 12 (inlined without_provenance_mut::<T>) {
                        }
                    }
                    scope 13 (inlined NonNull::<T>::as_ptr) {
                    }
                    scope 14 (inlined #[track_caller] std::ptr::mut_ptr::<impl *mut T>::add) {
                    }
                }
                scope 8 (inlined NonNull::<[T]>::from_ref) {
                    let mut _4: *const [T];
                }
                scope 9 (inlined NonNull::<[T]>::cast::<T>) {
                    let mut _5: *const T;
                    scope 10 (inlined NonNull::<[T]>::as_ptr) {
                    }
                }
            }
        }
    }
    scope 15 (inlined <std::slice::Iter<'_, T> as Iterator>::enumerate) {
        scope 16 (inlined Enumerate::<std::slice::Iter<'_, T>>::new) {
        }
    }
    scope 17 (inlined <Enumerate<std::slice::Iter<'_, T>> as IntoIterator>::into_iter) {
    }

    bb0: {
        StorageLive(_3);
        StorageLive(_4);
        _3 = PtrMetadata(copy _1);
        _4 = &raw const (*_1);
        StorageLive(_5);
        _5 = copy _4 as *const T (PtrToPtr);
        _6 = NonNull::<T> { pointer: copy _5 };
        StorageDead(_5);
        switchInt(const <T as std::mem::SizedTypeProperties>::IS_ZST) -> [0: bb1, otherwise: bb2];
    }

    bb1: {
        StorageLive(_8);
        StorageLive(_7);
        _7 = copy _4 as *mut T (PtrToPtr);
        _8 = Offset(copy _7, copy _3);
        StorageDead(_7);
        _9 = copy _8 as *const T (PtrToPtr);
        StorageDead(_8);
        goto -> bb3;
    }

    bb2: {
        _9 = copy _3 as *const T (Transmute);
        goto -> bb3;
    }

    bb3: {
        StorageDead(_4);
        StorageDead(_3);
        StorageLive(_10);
        _10 = const 0_usize;
        goto -> bb4;
    }

    bb4: {
        StorageLive(_28);
        StorageLive(_25);
        StorageLive(_26);
        StorageLive(_23);
        StorageLive(_11);
        StorageLive(_12);
        StorageLive(_19);
        StorageLive(_20);
        StorageLive(_13);
        StorageLive(_22);
        _11 = copy _6;
        _12 = copy _9;
        switchInt(const <T as std::mem::SizedTypeProperties>::IS_ZST) -> [0: bb5, otherwise: bb8];
    }

    bb5: {
        StorageLive(_16);
        _13 = copy _12 as std::ptr::NonNull<T> (Transmute);
        StorageLive(_14);
        _14 = copy _11 as *mut T (Transmute);
        StorageLive(_15);
        _15 = copy _13 as *mut T (Transmute);
        _16 = Eq(copy _14, copy _15);
        StorageDead(_15);
        StorageDead(_14);
        switchInt(move _16) -> [0: bb6, otherwise: bb7];
    }

    bb6: {
        StorageDead(_16);
        StorageLive(_18);
        StorageLive(_17);
        _17 = copy _11 as *const T (Transmute);
        _18 = Offset(copy _17, const 1_usize);
        StorageDead(_17);
        _6 = NonNull::<T> { pointer: copy _18 };
        StorageDead(_18);
        goto -> bb13;
    }

    bb7: {
        StorageDead(_16);
        StorageDead(_22);
        StorageDead(_13);
        StorageDead(_20);
        StorageDead(_19);
        StorageDead(_12);
        StorageDead(_11);
        goto -> bb10;
    }

    bb8: {
        _19 = copy _12 as usize (Transmute);
        switchInt(copy _19) -> [0: bb9, otherwise: bb12];
    }

    bb9: {
        StorageDead(_22);
        StorageDead(_13);
        StorageDead(_20);
        StorageDead(_19);
        StorageDead(_12);
        StorageDead(_11);
        goto -> bb10;
    }

    bb10: {
        StorageDead(_23);
        StorageDead(_26);
        StorageDead(_25);
        StorageDead(_28);
        StorageDead(_10);
        drop(_2) -> [return: bb11, unwind unreachable];
    }

    bb11: {
        return;
    }

    bb12: {
        _20 = SubUnchecked(copy _19, const 1_usize);
        _9 = copy _20 as *const T (Transmute);
        goto -> bb13;
    }

    bb13: {
        StorageLive(_21);
        _21 = copy _11 as *const T (Transmute);
        _22 = &(*_21);
        StorageDead(_21);
        _23 = Option::<&T>::Some(copy _22);
        StorageDead(_22);
        StorageDead(_13);
        StorageDead(_20);
        StorageDead(_19);
        StorageDead(_12);
        StorageDead(_11);
        _24 = copy ((_23 as Some).0: &T);
        StorageDead(_23);
        _25 = copy _10;
        _26 = AddWithOverflow(copy _10, const 1_usize);
        assert(!move (_26.1: bool), "attempt to compute `{} + {}`, which would overflow", copy _10, const 1_usize) -> [success: bb14, unwind unreachable];
    }

    bb14: {
        _10 = move (_26.0: usize);
        StorageLive(_27);
        _27 = (copy _25, copy _24);
        _28 = Option::<(usize, &T)>::Some(move _27);
        StorageDead(_27);
        StorageDead(_26);
        StorageDead(_25);
        _29 = copy (((_28 as Some).0: (usize, &T)).0: usize);
        _30 = copy (((_28 as Some).0: (usize, &T)).1: &T);
        StorageLive(_31);
        _31 = &_2;
        StorageLive(_32);
        _32 = (copy _29, copy _30);
        _33 = <impl Fn(usize, &T) as Fn<(usize, &T)>>::call(move _31, move _32) -> [return: bb15, unwind unreachable];
    }

    bb15: {
        StorageDead(_32);
        StorageDead(_31);
        StorageDead(_28);
        goto -> bb4;
    }
}