[Test] Replaced temporary function with async main.

test/Concurrency/Runtime/actor_counters.swift

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency %import-libdispatch)
+// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency %import-libdispatch -parse-as-library)
 
 // REQUIRES: executable_test
 // REQUIRES: concurrency
@@ -81,6 +81,8 @@ func runTest(numCounters: Int, numWorkers: Int, numIterations: Int) async {
   print("DONE!")
 }
 
-runAsyncAndBlock {
-  await runTest(numCounters: 10, numWorkers: 100, numIterations: 1000)
+@main struct Main {
+  static func main() async {
+    await runTest(numCounters: 10, numWorkers: 100, numIterations: 1000)
+  }
 }

test/Concurrency/Runtime/async_let_fibonacci.swift

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency %import-libdispatch)
+// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency %import-libdispatch -parse-as-library)
 
 // REQUIRES: executable_test
 // REQUIRES: concurrency
@@ -48,6 +48,8 @@ func runFibonacci(_ n: Int) async {
   assert(result == fib(n))
 }
 
-runAsyncAndBlock {
-  await runFibonacci(10)
+@main struct Main {
+  static func main() async {
+    await runFibonacci(10)
+  }
 }

test/Concurrency/Runtime/async_task_priority_current.swift

@@ -1,14 +1,12 @@
-// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency) | %FileCheck %s
+// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency -parse-as-library) | %FileCheck %s
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 
-func test_getPriority() {
-  runAsyncAndBlock {
+@main struct Main {
+  static func main() async {
     let p = await Task.currentPriority()
     // CHECK: priority: default
     print("priority: \(p)")
     assert(p == Task.Priority.default)
   }
 }
-
-test_getPriority()

test/Concurrency/Runtime/async_taskgroup_add_handle_completion.swift

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency) | %FileCheck %s --dump-input=always
+// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency -parse-as-library) | %FileCheck %s --dump-input=always
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 // REQUIRES: OS=macosx
@@ -65,4 +65,8 @@ func test_sum_nextOnPending() async {
   assert(sum == 6, "Expected \(6) but got \(sum)")
 }
 
-runAsyncAndBlock(test_sum_nextOnPending)
+@main struct Main {
+  static func main() async {
+    await test_sum_nextOnPending()
+  }
+}

test/Concurrency/Runtime/async_taskgroup_is_empty.swift

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency) | %FileCheck %s --dump-input always
+// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency -parse-as-library) | %FileCheck %s --dump-input always
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 // REQUIRES: OS=macosx
@@ -40,4 +40,8 @@ func test_taskGroup_isEmpty() async {
   }
 }
 
-runAsyncAndBlock(test_taskGroup_isEmpty)
+@main struct Main {
+  static func main() async {
+    await test_taskGroup_isEmpty()
+  }
+}

test/Concurrency/Runtime/async_taskgroup_next_not_invoked_cancelAll.swift

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency) | %FileCheck %s --dump-input=always
+// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency -parse-as-library) | %FileCheck %s --dump-input=always
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 // REQUIRES: OS=macosx
@@ -43,4 +43,8 @@ func test_skipCallingNext_butInvokeCancelAll() async {
   assert(result == 0)
 }
 
-runAsyncAndBlock(test_skipCallingNext_butInvokeCancelAll)
+@main struct Main {
+  static func main() async {
+    await test_skipCallingNext_butInvokeCancelAll()
+  }
+}

test/Concurrency/Runtime/async_taskgroup_next_not_invoked_without_cancelAll.swift

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency) | %FileCheck %s --dump-input=always
+// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency -parse-as-library) | %FileCheck %s --dump-input=always
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 // REQUIRES: OS=macosx
@@ -36,5 +36,9 @@ func test_skipCallingNext() async {
   assert(result == 0)
 }
 
-runAsyncAndBlock(test_skipCallingNext)
+@main struct Main {
+  static func main() async {
+    await test_skipCallingNext()
+  }
+}
 

test/Concurrency/Runtime/async_taskgroup_next_on_completed.swift

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency) | %FileCheck %s --dump-input=always
+// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency -parse-as-library) | %FileCheck %s --dump-input=always
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 // REQUIRES: OS=macosx
@@ -69,4 +69,8 @@ func test_sum_nextOnCompleted() async {
     print("result: \(sum)")
 }
 
-runAsyncAndBlock(test_sum_nextOnCompleted)
+@main struct Main {
+  static func main() async {
+    await test_sum_nextOnCompleted()
+  }
+}

test/Concurrency/Runtime/async_taskgroup_next_on_pending.swift

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency) | %FileCheck %s --dump-input=always
+// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency -parse-as-library) | %FileCheck %s --dump-input=always
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 // REQUIRES: OS=macosx
@@ -56,4 +56,8 @@ func test_sum_nextOnPending() async {
   assert(sum == expected, "Expected: \(expected), got: \(sum)")
 }
 
-runAsyncAndBlock(test_sum_nextOnPending)
+@main struct Main {
+  static func main() async {
+    await test_sum_nextOnPending()
+  }
+}

test/Concurrency/Runtime/async_taskgroup_throw_recover.swift

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency) | %FileCheck %s --dump-input always
+// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency -parse-as-library) | %FileCheck %s --dump-input always
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 // REQUIRES: OS=macosx
@@ -83,4 +83,9 @@ func test_taskGroup_throws() async {
   }
 }
 
-runAsyncAndBlock(test_taskGroup_throws)
+
+@main struct Main {
+  static func main() async {
+    await test_taskGroup_throws()
+  }
+}

test/Concurrency/Runtime/async_taskgroup_throw_rethrow.swift

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency) | %FileCheck %s --dump-input always
+// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency -parse-as-library) | %FileCheck %s --dump-input always
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 // REQUIRES: OS=macosx
@@ -43,4 +43,8 @@ func test_taskGroup_throws_rethrows() async {
 
 // CHECK: error caught and rethrown in group: Boom()
 // CHECK: rethrown: Boom()
-runAsyncAndBlock(test_taskGroup_throws_rethrows)
+@main struct Main {
+  static func main() async {
+    await test_taskGroup_throws_rethrows()
+  }
+}

test/Concurrency/Runtime/basic_future.swift

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency  %import-libdispatch)
+// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency  %import-libdispatch -parse-as-library)
 
 // REQUIRES: executable_test
 // REQUIRES: concurrency
@@ -22,7 +22,7 @@ func formGreeting(name: String) async -> String {
 
 func testSimple(
   name: String, dogName: String, shouldThrow: Bool, doSuspend: Bool
-) {
+) async {
   print("Testing name: \(name), dog: \(dogName), shouldThrow: \(shouldThrow) doSuspend: \(doSuspend)")
 
   var completed = false
@@ -46,36 +46,39 @@ func testSimple(
     return greeting + "!"
   }
 
-  runAsyncAndBlock {
-    // If the intent is not to test suspending, wait a bit so the first task
-    // can complete.
-    if !doSuspend {
-      print("+ Reader sleeping")
-      sleep(1)
-    }
+  // If the intent is not to test suspending, wait a bit so the first task
+  // can complete.
+  if !doSuspend {
+    print("+ Reader sleeping")
+    sleep(1)
+  }
 
-    do {
-      print("+ Reader waiting for the result")
-      let result = try await taskHandle.get()
-      completed = true
-      print("+ Normal return: \(result)")
-      assert(result == "Hello \(name) from async world!")
-    } catch HomeworkError.dogAteIt(let badDog) {
-      completed = true
-      print("+ Error return: HomeworkError.dogAteIt(\(badDog))")
-      assert(badDog == dogName + " the dog")
-    } catch {
-      fatalError("Caught a different exception?")
-    }
+  do {
+    print("+ Reader waiting for the result")
+    let result = try await taskHandle.get()
+    completed = true
+    print("+ Normal return: \(result)")
+    assert(result == "Hello \(name) from async world!")
+  } catch HomeworkError.dogAteIt(let badDog) {
+    completed = true
+    print("+ Error return: HomeworkError.dogAteIt(\(badDog))")
+    assert(badDog == dogName + " the dog")
+  } catch {
+    fatalError("Caught a different exception?")
   }
 
   assert(completed)
   print("Finished test")
 }
 
-testSimple(name: "Ted", dogName: "Hazel", shouldThrow: false, doSuspend: false)
-testSimple(name: "Ted", dogName: "Hazel", shouldThrow: true, doSuspend: false)
-testSimple(name: "Ted", dogName: "Hazel", shouldThrow: false, doSuspend: true)
-testSimple(name: "Ted", dogName: "Hazel", shouldThrow: true, doSuspend: true)
 
-print("Done")
+@main struct Main {
+  static func main() async {
+    await testSimple(name: "Ted", dogName: "Hazel", shouldThrow: false, doSuspend: false)
+    await testSimple(name: "Ted", dogName: "Hazel", shouldThrow: true, doSuspend: false)
+    await testSimple(name: "Ted", dogName: "Hazel", shouldThrow: false, doSuspend: true)
+    await testSimple(name: "Ted", dogName: "Hazel", shouldThrow: true, doSuspend: true)
+
+    print("Done")
+  }
+}

test/Concurrency/Runtime/future_fibonacci.swift

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency  %import-libdispatch)
+// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency  %import-libdispatch -parse-as-library)
 
 // REQUIRES: executable_test
 // REQUIRES: concurrency
@@ -47,15 +47,16 @@ func asyncFib(_ n: Int) async -> Int {
   return result
 }
 
-func runFibonacci(_ n: Int) {
-  var result = 0
-  runAsyncAndBlock {
-    result = await asyncFib(n)
-  }
+func runFibonacci(_ n: Int) async {
+  var result = await asyncFib(n)
 
   print()
   print("Async fib = \(result), sequential fib = \(fib(n))")
   assert(result == fib(n))
 }
 
-runFibonacci(15)
+@main struct Main {
+  static func main() async {
+    await runFibonacci(15)
+  }
+}

test/Concurrency/Runtime/objc_async.swift

@@ -1,16 +1,19 @@
 // RUN: %empty-directory(%t)
 // RUN: %target-clang %S/Inputs/objc_async.m -c -o %t/objc_async_objc.o
-// RUN: %target-build-swift -Xfrontend -enable-experimental-concurrency -import-objc-header %S/Inputs/objc_async.h %s %t/objc_async_objc.o -o %t/objc_async
+// RUN: %target-build-swift -Xfrontend -enable-experimental-concurrency -parse-as-library -module-name main -import-objc-header %S/Inputs/objc_async.h %s %t/objc_async_objc.o -o %t/objc_async
 // RUN: %target-run %t/objc_async | %FileCheck %s
 
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 // REQUIRES: objc_interop
 
-runAsyncAndBlock {
+
+@main struct Main {
+  static func main() async {
   let butt = Butt()
   let result = await butt.butt(1738)
   print("finishing \(result)")
+  }
 }
 
 // CHECK: starting 1738

test/DebugInfo/async-args.swift

@@ -1,5 +1,6 @@
 // RUN: %target-swift-frontend %s -emit-ir -g -o - \
-// RUN:    -module-name M -enable-experimental-concurrency | %FileCheck %s
+// RUN:    -module-name M -enable-experimental-concurrency \
+// RUN:    -parse-as-library | %FileCheck %s
 // REQUIRES: concurrency
 
 func use<T>(_ t: T) {}
@@ -32,8 +33,10 @@ func withGenericArg<T>(_ msg: T) async {
   use(msg)
 }
 // CHECK-LABEL: {{^define }}
-runAsyncAndBlock {
-  await withGenericArg("hello (asynchronously)")
+@main struct Main {
+  static func main() async {
+    await withGenericArg("hello (asynchronously)")
+  }
 }
 // CHECK: ![[MSG]] = !DILocalVariable(name: "msg", arg: 1,
 // CHECK: ![[TAU]] = !DILocalVariable(name: "$\CF\84_0_0",

test/IRGen/async/run-call-class-witnessmethod-void-to-void.swift

@@ -1,6 +1,6 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-build-swift -Xfrontend -enable-experimental-concurrency %s -emit-ir | %FileCheck %s --check-prefix=CHECK-LL
-// RUN: %target-build-swift -Xfrontend -enable-experimental-concurrency %s -module-name main -o %t/main
+// RUN: %target-build-swift -Xfrontend -enable-experimental-concurrency %s -parse-as-library -emit-ir -module-name main | %FileCheck %s --check-prefix=CHECK-LL
+// RUN: %target-build-swift -Xfrontend -enable-experimental-concurrency %s -parse-as-library -module-name main -o %t/main
 // RUN: %target-codesign %t/main
 // RUN: %target-run %t/main | %FileCheck %s
 
@@ -52,7 +52,9 @@ func call_f<T : P>(_ t: T) async {
 
 class X {}
 
-runAsyncAndBlock {
-  let x = X()
-  await call_f(x)
+@main struct Main {
+  static func main() async {
+    let x = X()
+    await call_f(x)
+  }
 }

test/IRGen/async/run-call-dynamic-void_to_void.swift

@@ -1,6 +1,6 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-build-swift -Xfrontend -enable-experimental-concurrency %s -emit-ir | %FileCheck %s --check-prefix=CHECK-LL
-// RUN: %target-build-swift -Xfrontend -enable-experimental-concurrency %s -module-name main -o %t/main %target-rpath(%t) 
+// RUN: %target-build-swift -Xfrontend -enable-experimental-concurrency %s -emit-ir -parse-as-library -module-name main | %FileCheck %s --check-prefix=CHECK-LL
+// RUN: %target-build-swift -Xfrontend -enable-experimental-concurrency %s -parse-as-library -module-name main -o %t/main %target-rpath(%t) 
 // RUN: %target-codesign %t/main
 // RUN: %target-run %t/main | %FileCheck %s
 
@@ -14,13 +14,15 @@ import _Concurrency
 
 // CHECK: running
 
-// CHECK-LL: @"$s4mainyyYcfU_Tu" = internal global %swift.async_func_pointer
+// CHECK-LL: @"$s4main3runyyYFTu" = hidden global %swift.async_func_pointer
 
 // CHECK-LL: define hidden swiftcc void @"$s4main3runyyYF"(%swift.task* {{%[0-9]+}}, %swift.executor* {{%[0-9]+}}, %swift.context* swiftasync {{%[0-9]+}}) {{#[0-9]*}} {
 dynamic func run() async {
   print("running")
 }
 
-runAsyncAndBlock {
-  await run()
+@main struct Main {
+  static func main() async {
+    await run()
+  }
 }