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78bfc9f955
For example:
```
%0 = load %1
copy_addr %1 to %2
```
->
```
%0 = load %1
store %0 to %2
```
This is important for MandatoryRedundantLoadElimination to be able to create statically initialized globals in the mandatory pipeline.
For example:
```
public struct MyStruct {
public static let r: Range<Int> = 1 ..< 3
}
```
gets a statically initialized global, even at Onone, with this improvement.
rdar://149356742
This directory tests fixed compiler crashers related to differentiable programming in Swift.
lit.local.cfg checks for asserts as a lit available feature, so there is
no need to add REQUIRES: asserts to individual test files.