// This test case tests the incremental compilation hash (ICH) implementation
// for `while let` loops.

// The general pattern followed here is: Change one thing between rev1 and rev2
// and make sure that the hash has changed, then change nothing between rev2 and
// rev3 and make sure that the hash has not changed.

// build-pass (FIXME(62277): could be check-pass?)
// revisions: cfail1 cfail2 cfail3
// compile-flags: -Z query-dep-graph -Zincremental-ignore-spans

#![allow(warnings)]
#![feature(rustc_attrs)]
#![crate_type="rlib"]


// Change loop body
#[cfg(cfail1)]
pub fn change_loop_body() {
    let mut _x = 0;
    while let Some(0u32) = None {
        _x = 1;
        break;
    }
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody, mir_built, optimized_mir")]
#[rustc_clean(cfg="cfail3")]
pub fn change_loop_body() {
    let mut _x = 0;
    while let Some(0u32) = None {
        _x = 2;
        break;
    }
}


// Change loop body
#[cfg(cfail1)]
pub fn change_loop_condition() {
    let mut _x = 0;
    while let Some(0u32) = None {
        _x = 1;
        break;
    }
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody, mir_built, optimized_mir")]
#[rustc_clean(cfg="cfail3")]
pub fn change_loop_condition() {
    let mut _x = 0;
    while let Some(1u32) = None {
        _x = 1;
        break;
    }
}


// Add break
#[cfg(cfail1)]
pub fn add_break() {
    let mut _x = 0;
    while let Some(0u32) = None {
        _x = 1;
    }
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody, mir_built, optimized_mir, typeck_tables_of")]
#[rustc_clean(cfg="cfail3")]
pub fn add_break() {
    let mut _x = 0;
    while let Some(0u32) = None {
        _x = 1;
        break;
    }
}


// Add loop label
#[cfg(cfail1)]
pub fn add_loop_label() {
    let mut _x = 0;
    while let Some(0u32) = None {
        _x = 1;
        break;
    }
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody")]
#[rustc_clean(cfg="cfail3")]
pub fn add_loop_label() {
    let mut _x = 0;
    'label: while let Some(0u32) = None {
        _x = 1;
        break;
    }
}


// Add loop label to break
#[cfg(cfail1)]
pub fn add_loop_label_to_break() {
    let mut _x = 0;
    'label: while let Some(0u32) = None {
        _x = 1;
        break;
    }
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody")]
#[rustc_clean(cfg="cfail3")]
pub fn add_loop_label_to_break() {
    let mut _x = 0;
    'label: while let Some(0u32) = None {
        _x = 1;
        break 'label;
    }
}


// Change break label
#[cfg(cfail1)]
pub fn change_break_label() {
    let mut _x = 0;
    'outer: while let Some(0u32) = None {
        'inner: while let Some(0u32) = None {
            _x = 1;
            break 'inner;
        }
    }
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody, mir_built, optimized_mir")]
#[rustc_clean(cfg="cfail3")]
pub fn change_break_label() {
    let mut _x = 0;
    'outer: while let Some(0u32) = None {
        'inner: while let Some(0u32) = None {
            _x = 1;
            break 'outer;
        }
    }
}


// Add loop label to continue
#[cfg(cfail1)]
pub fn add_loop_label_to_continue() {
    let mut _x = 0;
    'label: while let Some(0u32) = None {
        _x = 1;
        continue;
    }
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody")]
#[rustc_clean(cfg="cfail3")]
pub fn add_loop_label_to_continue() {
    let mut _x = 0;
    'label: while let Some(0u32) = None {
        _x = 1;
        continue 'label;
    }
}


// Change continue label
#[cfg(cfail1)]
pub fn change_continue_label() {
    let mut _x = 0;
    'outer: while let Some(0u32) = None {
        'inner: while let Some(0u32) = None {
            _x = 1;
            continue 'inner;
        }
    }
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody, mir_built, optimized_mir")]
#[rustc_clean(cfg="cfail3")]
pub fn change_continue_label() {
    let mut _x = 0;
    'outer: while let Some(0u32) = None {
        'inner: while let Some(0u32) = None {
            _x = 1;
            continue 'outer;
        }
    }
}


// Change continue to break
#[cfg(cfail1)]
pub fn change_continue_to_break() {
    let mut _x = 0;
    while let Some(0u32) = None {
        _x = 1;
        continue;
    }
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody, mir_built, optimized_mir")]
#[rustc_clean(cfg="cfail3")]
pub fn change_continue_to_break() {
    let mut _x = 0;
    while let Some(0u32) = None {
        _x = 1;
        break;
    }
}