This patch goes through and adds zippering and the swift module
dependencies to a bunch of pieces of the swift runtimes. Here's to
hoping I hit everything that needed to be hit. :D
With this patch, I'm seeing the appropriate modules under
lib/swift/maccatalyst, so things seem to be working right.
The SIL type lowering logic for AutoDiff gets the substituted generic signature
mixed up with the invocation generic signature, so it tries to ask questions
about DependentMemberTypes in a signature with no requirements. This triggers
assertions when the requirement machine is enabled.
Disable the requirement machine until this is fixed.
This fixes verification of emitted swiftinterface files.
```console
error: conditional conformance of type 'Tracked<T>' to protocol 'SignedNumeric' does not imply conformance to inherited protocol 'Numeric'
extension Tracked : Swift.SignedNumeric where T : Swift.SignedNumeric, T == T.Magnitude {
^
```
Resolves rdar://77869183.
Compiler:
- Add `Forward` and `Reverse` to `DifferentiabilityKind`.
- Expand `DifferentiabilityMask` in `ExtInfo` to 3 bits so that it now holds all 4 cases of `DifferentiabilityKind`.
- Parse `@differentiable(reverse)` and `@differentiable(_forward)` declaration attributes and type attributes.
- Emit a warning for `@differentiable` without `reverse`.
- Emit an error for `@differentiable(_forward)`.
- Rename `@differentiable(linear)` to `@differentiable(_linear)`.
- Make `@differentiable(reverse)` type lowering go through today's `@differentiable` code path. We will specialize it to reverse-mode in a follow-up patch.
ABI:
- Add `Forward` and `Reverse` to `FunctionMetadataDifferentiabilityKind`.
- Extend `TargetFunctionTypeFlags` by 1 bit to store the highest bit of differentiability kind (linear). Note that there is a 2-bit gap in `DifferentiabilityMask` which is reserved for `AsyncMask` and `ConcurrentMask`; `AsyncMask` is ABI-stable so we cannot change that.
_Differentiation module:
- Replace all occurrences of `@differentiable` with `@differentiable(reverse)`.
- Delete `_transpose(of:)`.
Resolves rdar://69980056.
Fix `Optional` differentiation crash for non-resilient `Wrapped` reference type.
Add `NonresilientTracked` type to `DifferentiationUnittest` for testing.
Resolves SR-13377.
