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c16c22cc9c
The optimized clone method ends up as the following MIR:
```
_2 = copy ((*_1).0: i32);
_3 = copy ((*_1).1: u64);
_4 = copy ((*_1).2: [i8; 3]);
_0 = Foo { a: move _2, b: move _3, c: move _4 };
```
We can transform this to:
```
_0 = copy (*_1);
```
72 lines
1.7 KiB
Diff
72 lines
1.7 KiB
Diff
- // MIR for `<impl at $DIR/gvn_clone.rs:12:10: 12:15>::clone` before GVN
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+ // MIR for `<impl at $DIR/gvn_clone.rs:12:10: 12:15>::clone` after GVN
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fn <impl at $DIR/gvn_clone.rs:12:10: 12:15>::clone(_1: &AllCopy) -> AllCopy {
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debug self => _1;
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let mut _0: AllCopy;
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let mut _2: i32;
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let mut _3: &i32;
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let _4: &i32;
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let mut _5: u64;
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let mut _6: &u64;
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let _7: &u64;
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let mut _8: [i8; 3];
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let mut _9: &[i8; 3];
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let _10: &[i8; 3];
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bb0: {
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StorageLive(_2);
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StorageLive(_3);
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- StorageLive(_4);
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+ nop;
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_4 = &((*_1).0: i32);
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_3 = copy _4;
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- _2 = copy (*_3);
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+ _2 = copy ((*_1).0: i32);
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goto -> bb1;
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}
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bb1: {
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StorageDead(_3);
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StorageLive(_5);
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StorageLive(_6);
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- StorageLive(_7);
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+ nop;
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_7 = &((*_1).1: u64);
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_6 = copy _7;
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- _5 = copy (*_6);
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+ _5 = copy ((*_1).1: u64);
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goto -> bb2;
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}
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bb2: {
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StorageDead(_6);
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StorageLive(_8);
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StorageLive(_9);
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- StorageLive(_10);
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+ nop;
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_10 = &((*_1).2: [i8; 3]);
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_9 = copy _10;
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- _8 = copy (*_9);
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+ _8 = copy ((*_1).2: [i8; 3]);
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goto -> bb3;
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}
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bb3: {
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StorageDead(_9);
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- _0 = AllCopy { a: move _2, b: move _5, c: move _8 };
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+ _0 = copy (*_1);
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StorageDead(_8);
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StorageDead(_5);
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StorageDead(_2);
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- StorageDead(_10);
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- StorageDead(_7);
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- StorageDead(_4);
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+ nop;
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+ nop;
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+ nop;
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return;
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}
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}
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