ae280281ce
The constructor `Derived(int)` in the newly added test `ClassDerivedFromOptionalValueConstructor` is not a template, and this used to cause an assertion failure in `valueOrConversionHasValue()` because `F.getTemplateSpecializationArgs()` returns null. (This is modeled after the `MaybeAlign(Align Value)` constructor, which similarly causes an assertion failure in the analysis when assigning an `Align` to a `MaybeAlign`.) To fix this, we can simply look at the type of the destination type which we're constructing or assigning to (instead of the function template argument), and this not only fixes this specific case but actually simplifies the implementation. I've added some additional tests for the case of assigning to a nested optional because we didn't have coverage for these and I wanted to make sure I didn't break anything.
The LLVM Compiler Infrastructure
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