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);
```
63 lines
1.4 KiB
Rust
63 lines
1.4 KiB
Rust
// MIR for `enum_clone_as_copy` after PreCodegen
|
|
|
|
fn enum_clone_as_copy(_1: &Enum1) -> Enum1 {
|
|
debug v => _1;
|
|
let mut _0: Enum1;
|
|
scope 1 (inlined <Enum1 as Clone>::clone) {
|
|
debug self => _1;
|
|
let mut _2: isize;
|
|
let mut _3: &AllCopy;
|
|
let mut _4: &NestCopy;
|
|
scope 2 {
|
|
debug __self_0 => _3;
|
|
scope 6 (inlined <AllCopy as Clone>::clone) {
|
|
debug self => _3;
|
|
}
|
|
}
|
|
scope 3 {
|
|
debug __self_0 => _4;
|
|
scope 4 (inlined <NestCopy as Clone>::clone) {
|
|
debug self => _4;
|
|
let _5: &AllCopy;
|
|
scope 5 (inlined <AllCopy as Clone>::clone) {
|
|
debug self => _5;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
bb0: {
|
|
StorageLive(_2);
|
|
StorageLive(_3);
|
|
StorageLive(_4);
|
|
_2 = discriminant((*_1));
|
|
switchInt(move _2) -> [0: bb1, 1: bb2, otherwise: bb4];
|
|
}
|
|
|
|
bb1: {
|
|
_3 = &(((*_1) as A).0: AllCopy);
|
|
_0 = copy (*_1);
|
|
goto -> bb3;
|
|
}
|
|
|
|
bb2: {
|
|
_4 = &(((*_1) as B).0: NestCopy);
|
|
StorageLive(_5);
|
|
_5 = &((((*_1) as B).0: NestCopy).1: AllCopy);
|
|
StorageDead(_5);
|
|
_0 = copy (*_1);
|
|
goto -> bb3;
|
|
}
|
|
|
|
bb3: {
|
|
StorageDead(_4);
|
|
StorageDead(_3);
|
|
StorageDead(_2);
|
|
return;
|
|
}
|
|
|
|
bb4: {
|
|
unreachable;
|
|
}
|
|
}
|