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);
```
41 lines
664 B
Rust
41 lines
664 B
Rust
// MIR for `old` after PreCodegen
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fn old(_1: Result<T, E>) -> Result<T, E> {
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debug x => _1;
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let mut _0: std::result::Result<T, E>;
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let mut _2: isize;
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let _3: T;
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let _4: E;
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scope 1 {
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debug v => _3;
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}
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scope 2 {
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debug e => _4;
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}
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bb0: {
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_2 = discriminant(_1);
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switchInt(move _2) -> [0: bb1, 1: bb2, otherwise: bb4];
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}
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bb1: {
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_3 = copy ((_1 as Ok).0: T);
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_0 = copy _1;
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goto -> bb3;
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}
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bb2: {
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_4 = copy ((_1 as Err).0: E);
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_0 = copy _1;
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goto -> bb3;
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}
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bb3: {
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return;
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}
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bb4: {
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unreachable;
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}
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}
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