[embedded][Concurrency] Fix missing swift_deletedAsyncMethodError

Author: kubamracek

include/swift/Runtime/RuntimeFunctions.def

@@ -2129,6 +2129,15 @@ FUNCTION(DeletedMethodError, Swift, swift_deletedMethodError, C_CC, AlwaysAvaila
         EFFECT(NoEffect),
          UNKNOWN_MEMEFFECTS)
 
+// void swift_deletedAsyncMethodError();
+FUNCTION(DeletedAsyncMethodError, _Concurrency, swift_deletedAsyncMethodError, SwiftAsyncCC,
+        ConcurrencyAvailability,
+        RETURNS(VoidTy),
+        ARGS(),
+        ATTRS(NoUnwind),
+        EFFECT(Concurrency),
+        UNKNOWN_MEMEFFECTS)
+
 FUNCTION(AllocError, Swift, swift_allocError, SwiftCC, AlwaysAvailable,
          RETURNS(ErrorPtrTy, OpaquePtrTy),
          ARGS(TypeMetadataPtrTy, WitnessTablePtrTy, OpaquePtrTy, Int1Ty),

lib/IRGen/GenDecl.cpp

@@ -3863,8 +3863,11 @@ IRGenModule::getAddrOfLLVMVariable(LinkEntity entity,
   LinkInfo link = LinkInfo::get(*this, entity, forDefinition);
 
   // Clang may have defined the variable already.
-  if (auto existing = Module.getNamedGlobal(link.getName()))
-    return getElementBitCast(existing, defaultType);
+  if (auto existing = Module.getNamedGlobal(link.getName())) {
+    auto var = getElementBitCast(existing, defaultType);
+    GlobalVars[entity] = var;
+    return var;
+  }
 
   const LazyConstantInitializer *lazyInitializer = nullptr;
   std::optional<ConstantInitBuilder> lazyBuilder;
@@ -4003,6 +4006,7 @@ IRGenModule::getAddrOfLLVMVariableOrGOTEquivalent(LinkEntity entity) {
   getAddrOfLLVMVariable(entity, ConstantInit(), DebugTypeInfo());
 
   auto entry = GlobalVars[entity];
+  assert(entry);
 
   /// Returns a direct reference.
   auto direct = [&]() -> ConstantReference {

test/embedded/concurrency-deleted-method.swift

@@ -0,0 +1,50 @@
+// RUN: %empty-directory(%t)
+// RUN: %target-swift-frontend -enable-experimental-feature Embedded -parse-as-library -module-name main %s -emit-ir | %FileCheck --check-prefix=CHECK-IR %s
+// RUN: %target-swift-frontend -enable-experimental-feature Embedded -parse-as-library -module-name main %s -c -o %t/a.o
+// RUN: %target-clang %t/a.o -o %t/a.out -L%swift_obj_root/lib/swift/embedded/%target-cpu-apple-macos -lswift_Concurrency -lswift_ConcurrencyDefaultExecutor -dead_strip
+// RUN: %target-run %t/a.out | %FileCheck %s
+
+// REQUIRES: executable_test
+// REQUIRES: swift_in_compiler
+// REQUIRES: optimized_stdlib
+// REQUIRES: OS=macosx
+// REQUIRES: swift_feature_Embedded
+
+import _Concurrency
+
+actor MyActor {
+    var value: Int = 42
+    func foo() async {
+        print("value: \(value)")
+    }
+
+    func thisIsUnused() async {
+        print("unused")
+    }
+}
+
+@main struct Main {
+    static func main() async {
+        let n = MyActor()
+        await n.foo()
+    }
+}
+
+// CHECK-IR:      @swift_deletedAsyncMethodErrorTu =
+// CHECK-IR:      @"$e4main7MyActorCN" = global <{ ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr }> <{ 
+// CHECK-IR-SAME:   ptr null,
+// CHECK-IR-SAME:   ptr @"$e4main7MyActorCfD",
+// CHECK-IR-SAME:   ptr null,
+// CHECK-IR-SAME:   ptr @swift_deletedMethodError,
+// CHECK-IR-SAME:   ptr @swift_deletedMethodError,
+// CHECK-IR-SAME:   ptr @swift_deletedMethodError,
+// CHECK-IR-SAME:   ptr @"$e4main7MyActorC3fooyyYaFTu",
+// CHECK-IR-SAME:   ptr @got.swift_deletedAsyncMethodErrorTu,
+// CHECK-IR-SAME:   ptr @"$e4main7MyActorCACycfC"
+// CHECK-IR-SAME: }>, align 8
+
+// CHECK-IR-NOT:  $e4main7MyActorC12thisIsUnusedyyYaF
+
+// CHECK-IR: define swifttailcc void @swift_deletedAsyncMethodError(ptr swiftasync %0)
+
+// CHECK: value: 42