| // RUN: %empty-directory(%t) |
| // RUN: %target-build-swift -emit-module -module-name tf1202 -emit-module-path %t/tf1202.swiftmodule %S/Inputs/tf1202-eliminating-differentiability-witness-original-function.swift |
| // RUN: %target-build-swift -I%t -emit-module -O %s |
| |
| // This situation exposed a bug where DeadFunctionElimination eliminated the |
| // SILFunction for `identity<T>` even though a differentiability witness for it |
| // still existed. This causes deserialization of this module to crash when |
| // trying to deserialize the differentiability witness because it can't find |
| // the original function `identity<T>`. |
| |
| import tf1202 |
| |
| func callit() -> Float { |
| return foo() |
| } |
