| // RUN: %target-swift-frontend -emit-sil -verify %s |
| // REQUIRES: asserts |
| |
| import _Differentiation |
| |
| // SR-13305: Test protocol witness thunk for `@differentiable` protocol |
| // requirement, where the required method has a non-wrt `inout` parameter |
| // that should be treated as a differentiability result. |
| |
| protocol SR_13305_Protocol { |
| @differentiable(wrt: x) |
| func method(x: Float, y: inout Float) |
| } |
| |
| struct SR_13305_Struct: SR_13305_Protocol { |
| @differentiable(wrt: x) |
| func method(x: Float, y: inout Float) { |
| y = y * x |
| } |
| } |
| |
| // Original crash: |
| // Assertion failed: (!array.empty() && "claiming next from empty array!"), function claimNext, file /Users/danielzheng/swift-build/swift/lib/SILGen/SILGenPoly.cpp, line 112. |
| // Stack dump: |
| // ... |
| // 1. Swift version 5.3-dev (LLVM f8bd914aadc2e7b, Swift ba9c433c81d51ea) |
| // 2. While evaluating request ASTLoweringRequest(Lowering AST to SIL for module main) |
| // 3. While generating SIL witness table protocol conformance to 'SR_13305_Protocol' (at sr-13305.swift:7:1) for type 'SR_13305_Struct' (declared at [sr-13305.swift:12:1 - line:17:1] RangeText="struct SR_13305_Struct: SR_13305_Protocol { |
| // @differentiable(wrt: x) |
| // func method(x: Float, y: inout Float) { |
| // y = y * x |
| // } |
| // ") |
| // 4. While generating protocol witness thunk SIL function "@AD__$s4main15SR_13305_StructVAA0B15_13305_ProtocolA2aDP6method1x1yySf_SfztFTW_jvp_SUU". |
| // for 'method(x:y:)' (at sr-13305.swift:14:3) |
| // 5. While emitting reabstraction thunk in SIL function "@$sSfIegy_S2fIegyd_TR". |
| // ... |
| // 7 swift-frontend 0x0000000100fe80ad swift::SILResultInfo const& claimNext<swift::SILResultInfo>(llvm::ArrayRef<swift::SILResultInfo>&) + 93 |
| // 8 swift-frontend 0x0000000100fe6cc0 (anonymous namespace)::ResultPlanner::claimNextInnerResult((anonymous namespace)::ResultPlanner::PlanData&) + 32 |
