[cxx-interop] add IRGen test for field base accessors for non-copyable fields

Author: hyp

test/Interop/Cxx/class/move-only/inherited-field-access-irgen.swift

@@ -0,0 +1,29 @@
+// RUN: %target-swift-emit-irgen -I %S/Inputs -enable-experimental-cxx-interop %s -validate-tbd-against-ir=none -Xcc -fignore-exceptions | %FileCheck %s
+
+import MoveOnlyCxxValueType
+
+func testGetX() -> CInt {
+    let derived = NonCopyableHolderDerivedDerived(42)
+    return derived.x.x
+}
+
+let _ = testGetX()
+
+func testSetX(_ x: CInt) {
+    var derived = NonCopyableHolderDerivedDerived(42)
+    derived.x.x = 2
+}
+
+testSetX(2)
+
+// CHECK: define {{.*}}linkonce_odr{{.*}} ptr @{{.*}}__synthesizedBaseCall___synthesizedBaseGetterAccessor{{.*}}
+
+// CHECK: define {{.*}}linkonce_odr{{.*}} ptr @{{.*}}__synthesizedBaseCall___synthesizedBaseSetterAccessor{{.*}}
+
+// CHECK: define {{.*}}linkonce_odr{{.*}} ptr @{{.*}}__synthesizedBaseGetterAccessor{{.*}}
+// CHECK: %[[VPTR:.*]] = getelementptr inbounds %struct.NonCopyableHolder
+// CHECK: ret ptr %[[VPTR]]
+
+// CHECK: define {{.*}}linkonce_odr{{.*}} ptr @{{.*}}__synthesizedBaseSetterAccessor{{.*}}
+// CHECK: %[[VPTRS:.*]] = getelementptr inbounds %struct.NonCopyableHolder
+// CHECK: ret ptr %[[VPTRS]]