swift

d1dddc90 - [AutoDiff] Optimize derivative generic signature computation. (#27428)

[AutoDiff] Optimize derivative generic signature computation. (#27428) Computing constrained derivative generic signatures is costly: remove unnecessary uses in the differentiation transform. The only remaining use is `[differentiable]` attribute construction, where it is necessary for correctness. Other users now extract the constrained derivative generic signature from a `[differentiable]` attribute. Derivative generic signatures may now contain layout/superclass constraints. This occurs for `autodiff_function` instructions with original function operands that are generic with layout/superclass constraints. Add tests.