73 lines
1.8 KiB
Diff
73 lines
1.8 KiB
Diff
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- // MIR for `foo` before GVN
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+ // MIR for `foo` after GVN
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fn foo(_1: &mut Option<i32>) -> Option<i32> {
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debug v => _1;
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let mut _0: std::option::Option<i32>;
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let mut _2: &std::option::Option<i32>;
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let mut _3: &std::option::Option<i32>;
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let _4: &&mut std::option::Option<i32>;
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let mut _5: isize;
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let mut _7: !;
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let mut _8: std::option::Option<i32>;
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let mut _9: i32;
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let mut _10: !;
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let mut _11: &mut std::option::Option<i32>;
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scope 1 {
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debug col => _6;
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let _6: i32;
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}
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bb0: {
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- StorageLive(_2);
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+ nop;
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StorageLive(_3);
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StorageLive(_4);
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_4 = &_1;
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- _11 = deref_copy (*_4);
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- _3 = &(*_11);
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+ _11 = copy _1;
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+ _3 = &(*_1);
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_2 = get(move _3) -> [return: bb1, unwind unreachable];
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}
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bb1: {
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StorageDead(_3);
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_5 = discriminant((*_2));
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switchInt(move _5) -> [1: bb2, otherwise: bb3];
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}
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bb2: {
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- StorageLive(_6);
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+ nop;
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_6 = copy (((*_2) as Some).0: i32);
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StorageLive(_8);
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- _8 = Option::<i32>::None;
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- (*_1) = move _8;
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+ _8 = const Option::<i32>::None;
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+ (*_1) = const Option::<i32>::None;
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StorageDead(_8);
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StorageLive(_9);
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_9 = copy _6;
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- _0 = Option::<i32>::Some(move _9);
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+ _0 = copy (*_2);
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StorageDead(_9);
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- StorageDead(_6);
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+ nop;
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StorageDead(_4);
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- StorageDead(_2);
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+ nop;
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return;
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}
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bb3: {
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StorageLive(_10);
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unreachable;
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}
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+ }
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+
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+ ALLOC0 (size: 8, align: 4) {
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+ 00 00 00 00 __ __ __ __ │ ....░░░░
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}
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