rust/tests/mir-opt/pre-codegen/range_iter.forward_loop.PreCodegen.after.panic-unwind.mir

// MIR for `forward_loop` after PreCodegen

fn forward_loop(_1: u32, _2: u32, _3: impl Fn(u32)) -> () {
    debug start => _1;
    debug end => _2;
    debug f => _3;
    let mut _0: ();
    let mut _7: std::option::Option<u32>;
    let mut _9: &impl Fn(u32);
    let mut _10: (u32,);
    let _11: ();
    scope 1 {
        debug ((iter: std::ops::Range<u32>).0: u32) => _1;
        debug ((iter: std::ops::Range<u32>).1: u32) => _2;
        let _8: u32;
        scope 2 {
            debug x => _8;
        }
        scope 4 (inlined iter::range::<impl Iterator for std::ops::Range<u32>>::next) {
            scope 5 (inlined <std::ops::Range<u32> as iter::range::RangeIteratorImpl>::spec_next) {
                let mut _5: bool;
                let _6: u32;
                scope 6 {
                    scope 8 (inlined <u32 as Step>::forward_unchecked) {
                        scope 9 (inlined #[track_caller] core::num::<impl u32>::unchecked_add) {
                            scope 10 (inlined core::ub_checks::check_language_ub) {
                                scope 11 (inlined core::ub_checks::check_language_ub::runtime) {
                                }
                            }
                        }
                    }
                }
                scope 7 (inlined std::cmp::impls::<impl PartialOrd for u32>::lt) {
                    let mut _4: u32;
                }
            }
        }
    }
    scope 3 (inlined <std::ops::Range<u32> as IntoIterator>::into_iter) {
    }

    bb0: {
        goto -> bb1;
    }

    bb1: {
        StorageLive(_7);
        StorageLive(_5);
        StorageLive(_4);
        _4 = copy _1;
        _5 = Lt(move _4, copy _2);
        StorageDead(_4);
        switchInt(move _5) -> [0: bb2, otherwise: bb4];
    }

    bb2: {
        StorageDead(_5);
        StorageDead(_7);
        drop(_3) -> [return: bb3, unwind continue];
    }

    bb3: {
        return;
    }

    bb4: {
        _6 = copy _1;
        _1 = AddUnchecked(copy _6, const 1_u32);
        _7 = Option::<u32>::Some(copy _6);
        StorageDead(_5);
        _8 = copy ((_7 as Some).0: u32);
        StorageLive(_9);
        _9 = &_3;
        StorageLive(_10);
        _10 = (copy _8,);
        _11 = <impl Fn(u32) as Fn<(u32,)>>::call(move _9, move _10) -> [return: bb5, unwind: bb6];
    }

    bb5: {
        StorageDead(_10);
        StorageDead(_9);
        StorageDead(_7);
        goto -> bb1;
    }

    bb6 (cleanup): {
        drop(_3) -> [return: bb7, unwind terminate(cleanup)];
    }

    bb7 (cleanup): {
        resume;
    }
}