rust/tests/mir-opt/pre-codegen/range_iter.range_iter_next.PreCodegen.after.mir

// MIR for `range_iter_next` after PreCodegen

fn range_iter_next(_1: &mut std::ops::Range<u32>) -> Option<u32> {
    debug it => _1;                      // in scope 0 at $DIR/range_iter.rs:+0:24: +0:26
    let mut _0: std::option::Option<u32>; // return place in scope 0 at $DIR/range_iter.rs:+0:48: +0:59
    scope 1 (inlined iter::range::<impl Iterator for std::ops::Range<u32>>::next) { // at $DIR/range_iter.rs:11:8: 11:14
        debug self => _1;                // in scope 1 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        scope 2 (inlined <std::ops::Range<u32> as iter::range::RangeIteratorImpl>::spec_next) { // at $SRC_DIR/core/src/iter/range.rs:LL:COL
            debug self => _1;            // in scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
            let mut _2: &u32;            // in scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
            let mut _3: &u32;            // in scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
            let mut _4: bool;            // in scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
            let _5: u32;                 // in scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
            let mut _6: u32;             // in scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
            scope 3 {
                debug old => _5;         // in scope 3 at $SRC_DIR/core/src/iter/range.rs:LL:COL
                scope 4 {
                }
            }
        }
    }

    bb0: {
        StorageLive(_5);                 // scope 1 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        StorageLive(_4);                 // scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        StorageLive(_2);                 // scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        _2 = &((*_1).0: u32);            // scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        StorageLive(_3);                 // scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        _3 = &((*_1).1: u32);            // scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        _4 = <u32 as PartialOrd>::lt(move _2, move _3) -> bb1; // scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
                                         // mir::Constant
                                         // + span: $SRC_DIR/core/src/iter/range.rs:LL:COL
                                         // + literal: Const { ty: for<'a, 'b> fn(&'a u32, &'b u32) -> bool {<u32 as PartialOrd>::lt}, val: Value(<ZST>) }
    }

    bb1: {
        StorageDead(_3);                 // scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        StorageDead(_2);                 // scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        switchInt(move _4) -> [0: bb2, otherwise: bb3]; // scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
    }

    bb2: {
        _0 = Option::<u32>::None;        // scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        goto -> bb5;                     // scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
    }

    bb3: {
        _5 = ((*_1).0: u32);             // scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        StorageLive(_6);                 // scope 3 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        _6 = <u32 as Step>::forward_unchecked(_5, const 1_usize) -> bb4; // scope 4 at $SRC_DIR/core/src/iter/range.rs:LL:COL
                                         // mir::Constant
                                         // + span: $SRC_DIR/core/src/iter/range.rs:LL:COL
                                         // + literal: Const { ty: unsafe fn(u32, usize) -> u32 {<u32 as Step>::forward_unchecked}, val: Value(<ZST>) }
    }

    bb4: {
        ((*_1).0: u32) = move _6;        // scope 3 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        StorageDead(_6);                 // scope 3 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        _0 = Option::<u32>::Some(_5);    // scope 3 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        goto -> bb5;                     // scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
    }

    bb5: {
        StorageDead(_4);                 // scope 2 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        StorageDead(_5);                 // scope 1 at $SRC_DIR/core/src/iter/range.rs:LL:COL
        return;                          // scope 0 at $DIR/range_iter.rs:+2:2: +2:2
    }
}