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// RUN: %empty-directory(%t)
// This test checks that we serialize the -enable-library-evolution
// flag.
// RUN: %target-swift-frontend -emit-module -o %t %s
// RUN: llvm-bcanalyzer -dump %t/resilience.swiftmodule > %t/resilience.dump.txt
// RUN: %FileCheck -check-prefix=CHECK -check-prefix=DEFAULT %s < %t/resilience.dump.txt
// RUN: %target-swift-frontend -emit-module -o %t -enable-library-evolution %s
// RUN: llvm-bcanalyzer -dump %t/resilience.swiftmodule > %t/resilience2.dump.txt
// RUN: %FileCheck -check-prefix=CHECK -check-prefix=RESILIENCE %s < %t/resilience2.dump.txt
// RUN: %FileCheck -check-prefix=NEGATIVE %s < %t/resilience2.dump.txt
// FIXME: The alternate -enable-resilience flag is going away soon.
// RUN: %target-swift-frontend -emit-module -o %t -enable-resilience %s
// RUN: llvm-bcanalyzer -dump %t/resilience.swiftmodule > %t/resilience2.dump.txt
// RUN: %FileCheck -check-prefix=CHECK -check-prefix=RESILIENCE %s < %t/resilience2.dump.txt
// RUN: %FileCheck -check-prefix=NEGATIVE %s < %t/resilience2.dump.txt
// CHECK: <MODULE_BLOCK {{.*}}>
// RESILIENCE: <RESILIENCE_STRATEGY abbrevid={{[0-9]+}} op0=1/>
// FRAGILE-NOT: <RESILIENCE_STRATEGY abbrevid={{[0-9]+}}
// DEFAULT-NOT: RESILIENCE_STRATEGY
// CHECK: </MODULE_BLOCK>
// CHECK-NOT: <MODULE_BLOCK {{.*}}>
// NEGATIVE-NOT: UnknownCode
public func flip() {}
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