[Test] Add Interpreter and IRGen tests for SR-13203 (#33340)

Author: theblixguy

test/IRGen/objc_runtime_name_local_class_opaque_type.swift

@@ -0,0 +1,19 @@
+// RUN: %empty-directory(%t)
+// RUN: %target-swift-frontend %s -disable-availability-checking -emit-ir | %FileCheck %s
+
+// REQUIRES: objc_interop
+
+protocol MyProtocol {}
+
+func returnsClass1() -> some MyProtocol {
+  class MyClass1: MyProtocol {}
+  return MyClass1()
+}
+
+var returnsClass2: some MyProtocol {
+  class MyClass2: MyProtocol {}
+  return MyClass2()
+}
+
+// CHECK: @_DATA__TtCF41objc_runtime_name_local_class_opaque_type13returnsClass1FT_QuL_8MyClass1 = internal constant
+// CHECK: @_DATA__TtCF41objc_runtime_name_local_class_opaque_typeg13returnsClass2QuL_8MyClass2 = internal constant

test/Interpreter/runtime_name_local_class_opaque_type.swift

@@ -0,0 +1,24 @@
+// RUN: %empty-directory(%t)
+// RUN: %target-build-swift -Xfrontend -disable-availability-checking %s -o %t/a.out
+// RUN: %target-run %t/a.out | %FileCheck %s
+
+// REQUIRES: executable_test
+// REQUIRES: objc_interop
+
+protocol MyProtocol {}
+
+func returnsClass1() -> some MyProtocol {
+  class MyClass1: MyProtocol {}
+  return MyClass1()
+}
+
+var returnsClass2: some MyProtocol {
+  class MyClass2: MyProtocol {}
+  return MyClass2()
+}
+
+print(returnsClass1())
+// CHECK: a.(unknown context at ${{[0-9a-z]+}}).(unknown context at ${{[0-9a-z]+}}).MyClass1
+
+print(returnsClass2)
+// CHECK: a.(unknown context at ${{[0-9a-z]+}}).(unknown context at ${{[0-9a-z]+}}).MyClass2