Merge pull request swiftlang#35442 from nate-chandler/rdar73026036

[Async CC] Handle dynamic functions.

Author: nate-chandler

lib/IRGen/GenDecl.cpp

@@ -2604,7 +2604,8 @@ void IRGenModule::createReplaceableProlog(IRGenFunction &IGF, SILFunction *f) {
   auto authInfo = PointerAuthInfo::emit(IGF, schema, fnPtrAddr, authEntity);
 
   auto *Res = IGF.Builder.CreateCall(
-      FunctionPointer(silFunctionType, realReplFn, authInfo, signature),
+      FunctionPointer(silFunctionType, realReplFn, authInfo, signature)
+          .getAsFunction(IGF),
       forwardedArgs);
   Res->setTailCall();
   if (IGF.CurFn->getReturnType()->isVoidTy())

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

@@ -0,0 +1,26 @@
+// 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-codesign %t/main
+// RUN: %target-run %t/main | %FileCheck %s
+
+// REQUIRES: executable_test
+// REQUIRES: swift_test_mode_optimize_none
+// REQUIRES: concurrency
+// UNSUPPORTED: use_os_stdlib
+
+import _Concurrency
+
+
+// CHECK: running
+
+// CHECK-LL: @"$s4mainyyYcfU_Tu" = internal global %swift.async_func_pointer
+
+// CHECK-LL: define hidden swiftcc void @"$s4main3runyyYF"(%swift.task* {{%[0-9]+}}, %swift.executor* {{%[0-9]+}}, %swift.context* {{%[0-9]+}}) {{#[0-9]*}} {
+dynamic func run() async {
+  print("running")
+}
+
+runAsyncAndBlock {
+  await run()
+}