Dan Zheng 48c048f34d [AutoDiff] Fix PullbackCloner tangent value category mismatch issues. ...

Fix SIL pullback function type calculation: remap original `unowned` results to
the correct pullback parameter convention depending on the `TangentVector` type
lowering.

Make `PullbackCloner` visitors for the following instructions check and handle
tangent value categories: `struct`, `struct_extract`, `tuple`, `destructure_tuple`.

Add differentiation tests for `Optional` struct and class stored properties,
exercising the instruction visitors above.

Resolves SR-13430.

2020-08-24 10:39:23 -07:00

14 KiB

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