| // RUN: %target-swift-frontend -c %s -verify |
| // REQUIRES: asserts |
| |
| // TF-1160: Linker error for `@usableFromInline` derivative function but |
| // non-`@usableFromInline` internal original function. |
| |
| import _Differentiation |
| |
| func internalOriginal(_ x: Float) -> Float { x } |
| |
| @usableFromInline |
| @derivative(of: internalOriginal) |
| func usableFromInlineDerivative(_ x: Float) -> (value: Float, pullback: (Float) -> Float) { |
| (x, { $0 }) |
| } |
| |
| // Original error: type-checking passes but TBDGen is not consistent with IRGen. |
| // <unknown>:0: error: symbol 'AD__$s4main16internalOriginalyS2fF__vjp_src_0_wrt_0' (AD__$s4main16internalOriginalyS2fF__vjp_src_0_wrt_0) is in generated IR file, but not in TBD file |
| // <unknown>:0: error: please file a radar or open a bug on bugs.swift.org with this code, and add -Xfrontend -validate-tbd-against-ir=none to squash the errors |
