rust/tests/mir-opt/pre-codegen/slice_iter.range_loop.PreCodegen.after.panic-unwind.mir

// MIR for `range_loop` after PreCodegen

fn range_loop(_1: &[T], _2: impl Fn(usize, &T)) -> () {
    debug slice => _1;
    debug f => _2;
    let mut _0: ();
    let mut _3: usize;
    let mut _4: usize;
    let mut _7: std::option::Option<usize>;
    let mut _10: isize;
    let mut _12: usize;
    let mut _13: bool;
    let mut _15: &impl Fn(usize, &T);
    let mut _16: (usize, &T);
    let _17: ();
    let mut _18: usize;
    scope 1 {
        debug iter => std::ops::Range<usize>{ .0 => _4, .1 => _3, };
        let _11: usize;
        scope 2 {
            debug i => _11;
            let _14: &T;
            scope 3 {
                debug x => _14;
            }
        }
        scope 5 (inlined iter::range::<impl Iterator for std::ops::Range<usize>>::next) {
            debug self => &std::ops::Range<usize>{ .0 => _4, .1 => _3, };
            scope 6 (inlined <std::ops::Range<usize> as iter::range::RangeIteratorImpl>::spec_next) {
                debug self => &std::ops::Range<usize>{ .0 => _4, .1 => _3, };
                let mut _6: bool;
                let _8: usize;
                let mut _9: usize;
                scope 7 {
                    debug old => _8;
                    scope 8 {
                    }
                }
                scope 9 (inlined cmp::impls::<impl PartialOrd for usize>::lt) {
                    debug self => &_4;
                    debug other => &_3;
                    let mut _5: usize;
                }
            }
        }
    }
    scope 4 (inlined <std::ops::Range<usize> as IntoIterator>::into_iter) {
        debug self => std::ops::Range<usize>{ .0 => _18, .1 => _3, };
    }

    bb0: {
        _3 = Len((*_1));
        StorageLive(_4);
        _4 = const 0_usize;
        goto -> bb1;
    }

    bb1: {
        StorageLive(_7);
        StorageLive(_8);
        StorageLive(_6);
        StorageLive(_5);
        _5 = _4;
        _6 = Lt(move _5, _3);
        StorageDead(_5);
        switchInt(move _6) -> [0: bb2, otherwise: bb3];
    }

    bb2: {
        _7 = Option::<usize>::None;
        goto -> bb5;
    }

    bb3: {
        _8 = _4;
        StorageLive(_9);
        _9 = <usize as Step>::forward_unchecked(_8, const 1_usize) -> [return: bb4, unwind: bb12];
    }

    bb4: {
        _4 = move _9;
        StorageDead(_9);
        _7 = Option::<usize>::Some(_8);
        goto -> bb5;
    }

    bb5: {
        StorageDead(_6);
        StorageDead(_8);
        _10 = discriminant(_7);
        switchInt(move _10) -> [0: bb6, 1: bb8, otherwise: bb11];
    }

    bb6: {
        StorageDead(_7);
        StorageDead(_4);
        drop(_2) -> [return: bb7, unwind continue];
    }

    bb7: {
        return;
    }

    bb8: {
        _11 = ((_7 as Some).0: usize);
        _12 = Len((*_1));
        _13 = Lt(_11, _12);
        assert(move _13, "index out of bounds: the length is {} but the index is {}", move _12, _11) -> [success: bb9, unwind: bb12];
    }

    bb9: {
        _14 = &(*_1)[_11];
        StorageLive(_15);
        _15 = &_2;
        StorageLive(_16);
        _16 = (_11, _14);
        _17 = <impl Fn(usize, &T) as Fn<(usize, &T)>>::call(move _15, move _16) -> [return: bb10, unwind: bb12];
    }

    bb10: {
        StorageDead(_16);
        StorageDead(_15);
        StorageDead(_7);
        goto -> bb1;
    }

    bb11: {
        unreachable;
    }

    bb12 (cleanup): {
        drop(_2) -> [return: bb13, unwind terminate];
    }

    bb13 (cleanup): {
        resume;
    }
}