// MIR for `use_x` 0 nll

| Free Region Mapping
| '?0 | Global | ['?2, '?1, '?0, '?4, '?3]
| '?1 | Local | ['?1, '?4]
| '?2 | Local | ['?2, '?1, '?4]
| '?3 | Local | ['?4, '?3]
| '?4 | Local | ['?4]
|
| Inferred Region Values
| '?0 | U0 | {bb0[0..=1], '?0, '?1, '?2, '?3, '?4}
| '?1 | U0 | {bb0[0..=1], '?1}
| '?2 | U0 | {bb0[0..=1], '?2}
| '?3 | U0 | {bb0[0..=1], '?3}
| '?4 | U0 | {bb0[0..=1], '?4}
| '?5 | U0 | {bb0[0..=1], '?1}
| '?6 | U0 | {bb0[0..=1], '?2}
| '?7 | U0 | {bb0[0..=1], '?1}
| '?8 | U0 | {bb0[0..=1], '?3}
|
| Inference Constraints
| '?0 live at {bb0[0..=1]}
| '?1 live at {bb0[0..=1]}
| '?2 live at {bb0[0..=1]}
| '?3 live at {bb0[0..=1]}
| '?4 live at {bb0[0..=1]}
| '?1: '?5 due to BoringNoLocation at All($DIR/named_lifetimes_basic.rs:12:26: 12:27) ($DIR/named_lifetimes_basic.rs:12:26: 12:27 (#0)
| '?1: '?7 due to BoringNoLocation at All($DIR/named_lifetimes_basic.rs:12:54: 12:55) ($DIR/named_lifetimes_basic.rs:12:54: 12:55 (#0)
| '?2: '?6 due to BoringNoLocation at All($DIR/named_lifetimes_basic.rs:12:42: 12:43) ($DIR/named_lifetimes_basic.rs:12:42: 12:43 (#0)
| '?3: '?8 due to BoringNoLocation at All($DIR/named_lifetimes_basic.rs:12:66: 12:67) ($DIR/named_lifetimes_basic.rs:12:66: 12:67 (#0)
| '?5: '?1 due to BoringNoLocation at All($DIR/named_lifetimes_basic.rs:12:26: 12:27) ($DIR/named_lifetimes_basic.rs:12:26: 12:27 (#0)
| '?6: '?2 due to BoringNoLocation at All($DIR/named_lifetimes_basic.rs:12:42: 12:43) ($DIR/named_lifetimes_basic.rs:12:42: 12:43 (#0)
| '?7: '?1 due to BoringNoLocation at All($DIR/named_lifetimes_basic.rs:12:54: 12:55) ($DIR/named_lifetimes_basic.rs:12:54: 12:55 (#0)
| '?8: '?3 due to BoringNoLocation at All($DIR/named_lifetimes_basic.rs:12:66: 12:67) ($DIR/named_lifetimes_basic.rs:12:66: 12:67 (#0)
|
fn use_x(_1: &'?5 mut i32, _2: &'?6 u32, _3: &'?7 u32, _4: &'?8 u32) -> bool {
    debug w => _1;
    debug x => _2;
    debug y => _3;
    debug z => _4;
    let mut _0: bool;

    bb0: {
        _0 = const ConstValue(Scalar(0x01): bool);
        return;
    }
}