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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.
15 lines
527 B
Swift
15 lines
527 B
Swift
// RUN: %target-swift-frontend -emit-sil -verify %s
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// Tests that differentiation features interact correctly with non-differentiation SILOptimizer
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// passes.
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import _Differentiation
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// - MARK: DiagnoseInvalidEscapingCaptures
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func nonEscapingUseOfDifferentiableFunction(_ f: @differentiable(reverse) (Float) -> Float) {}
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func testDiagnoseInvalidEscapingCaptures(_ f: @differentiable(reverse) (Float) -> Float) {
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// Should not be diagnosed as invalid escaping capture.
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nonEscapingUseOfDifferentiableFunction { f($0) }
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}
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