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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);
```
55 lines
1.3 KiB
Diff
55 lines
1.3 KiB
Diff
- // MIR for `remove_storage_dead` before GVN
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+ // MIR for `remove_storage_dead` after GVN
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fn remove_storage_dead(_1: fn() -> AlwaysSome<T>) -> AlwaysSome<T> {
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debug f => _1;
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let mut _0: AlwaysSome<T>;
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let _2: T;
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let mut _3: AlwaysSome<T>;
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let mut _4: fn() -> AlwaysSome<T>;
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let _5: T;
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let mut _6: T;
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let mut _7: isize;
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let mut _8: isize;
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scope 1 {
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debug v => _2;
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}
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scope 2 {
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debug v => _5;
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}
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bb0: {
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StorageLive(_2);
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- StorageLive(_3);
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+ nop;
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StorageLive(_4);
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_4 = copy _1;
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- _3 = move _4() -> [return: bb1, unwind unreachable];
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+ _3 = copy _1() -> [return: bb1, unwind unreachable];
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}
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bb1: {
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StorageDead(_4);
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- StorageLive(_5);
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- _5 = move ((_3 as Some).0: T);
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- _2 = move _5;
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- StorageDead(_5);
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+ nop;
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+ _5 = copy ((_3 as Some).0: T);
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+ _2 = copy _5;
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+ nop;
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_7 = discriminant(_3);
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- StorageDead(_3);
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+ nop;
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StorageLive(_6);
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- _6 = move _2;
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- _0 = AlwaysSome::<T>::Some(move _6);
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+ _6 = copy _5;
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+ _0 = copy _3;
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StorageDead(_6);
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StorageDead(_2);
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return;
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}
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}
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