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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);
```
18 lines
405 B
Rust
18 lines
405 B
Rust
//@ test-mir-pass: GVN
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//@ compile-flags: -Zmir-enable-passes=+InstSimplify-before-inline
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// Check if we have transformed the default clone to copy in the specific pipeline.
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// EMIT_MIR gvn_clone.{impl#0}-clone.GVN.diff
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// CHECK-LABEL: ::clone(
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// CHECK-NOT: = AllCopy { {{.*}} };
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// CHECK: _0 = copy (*_1);
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// CHECK: return;
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#[derive(Clone)]
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struct AllCopy {
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a: i32,
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b: u64,
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c: [i8; 3],
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}
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