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Add `differentiable_function` and `differentiable_function_extract` instructions. `differentiable_function` creates a `@differentiable` function-typed value from an original function operand and derivative function operands (optional). `differentiable_function_extract` extracts either the original or derivative function value from a `@differentiable` function. The differentiation transform canonicalizes `differentiable_function` instructions, filling in derivative function operands if missing. Resolves TF-1139 and TF-1140.
61 KiB
61 KiB