Sema: Force destructor synthesis in evaluateMembersRequest()

Author: slavapestov

lib/Sema/TypeCheckDecl.cpp

@@ -2781,6 +2781,11 @@ static ArrayRef<Decl *> evaluateMembersRequest(
     // We need to add implicit initializers because they
     // affect vtable layout.
     TypeChecker::addImplicitConstructors(nominal);
+
+    // Destructors don't affect vtable layout, but TBDGen needs to
+    // see them, so we also force the destructor here.
+    if (auto *classDecl = dyn_cast<ClassDecl>(nominal))
+      (void) classDecl->getDestructor();
   }
 
   // Force any conformances that may introduce more members.

test/ModuleInterface/resolve-imports.swift

@@ -12,4 +12,11 @@ public func f() -> Int {}
 // get type checked.
 private func bad1(_: NotAThing) -> DoesNotExist {}
 
-internal typealias Bad1 = NotEvenReal.DefinitelyNot
+internal typealias Bad1 = NotEvenReal.DefinitelyNot
+
+// Destructors
+public class C {}
+
+// CHECK: public class C {
+// CHECK: deinit
+// CHECK: }