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af8942d940
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.
34 lines
1006 B
Swift
34 lines
1006 B
Swift
// RUN: %target-build-swift -g %s
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// TF-1232: IRGenDebugInfo crash due to lack of proper mangling for
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// AutoDiff-generated declarations: linear map structs and branching trace
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// enums.
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import _Differentiation
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extension Float {
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@_silgen_name("add")
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static func add(_ x: Float, _ y: Float) -> Float {
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return x + y
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}
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@derivative(of: add)
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static func addVJP(_ x: Float, _ y: Float) -> (
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value: Float, pullback: (Float) -> (Float, Float)
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) {
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return (add(x, y), { v in (v, v) })
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}
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}
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@differentiable(reverse)
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func foo(_ x: Float) -> Float {
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let y = Float.add(x, x)
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return y
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}
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// Failed to reconstruct type for $s4main42_AD__$s4main3fooyS2fF_bb0__PB__src_0_wrt_0VmD
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// Original type:
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// (metatype_type
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// (struct_type decl=main.(file)._AD__$s4main3fooyS2fF_bb0__PB__src_0_wrt_0))
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// Assertion failed: (isa<X>(Val) && "cast<Ty>() argument of incompatible type!"), function cast, file /Users/danielzheng/swift-merge/llvm-project/llvm/include/llvm/Support/Casting.h, line 264.
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