rust/tests/mir-opt/pre-codegen/checked_ops.saturating_sub_at_home.PreCodegen.after.panic-unwind.mir

// MIR for `saturating_sub_at_home` after PreCodegen

fn saturating_sub_at_home(_1: u32, _2: u32) -> u32 {
    debug lhs => _1;
    debug rhs => _2;
    let mut _0: u32;
    let mut _5: std::option::Option<u32>;
    scope 1 (inlined core::num::<impl u32>::checked_sub) {
        let mut _3: bool;
        let mut _4: u32;
    }
    scope 2 (inlined Option::<u32>::unwrap_or) {
        scope 3 {
        }
    }

    bb0: {
        StorageLive(_5);
        StorageLive(_3);
        _3 = Lt(copy _1, copy _2);
        switchInt(move _3) -> [0: bb1, otherwise: bb2];
    }

    bb1: {
        StorageLive(_4);
        _4 = SubUnchecked(copy _1, copy _2);
        _5 = Option::<u32>::Some(move _4);
        StorageDead(_4);
        StorageDead(_3);
        _0 = move ((_5 as Some).0: u32);
        goto -> bb3;
    }

    bb2: {
        StorageDead(_3);
        _0 = const 0_u32;
        goto -> bb3;
    }

    bb3: {
        StorageDead(_5);
        return;
    }
}