fixup! add missing test

Author: Michael137

clang/test/CodeGenCXX/zero-init-empty-virtual.cpp

@@ -0,0 +1,35 @@
+// RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s --check-prefixes=CHECK
+
+struct polymorphic_base {
+    virtual void func() {}
+    virtual ~polymorphic_base() {}
+};
+
+struct Empty {};
+struct derived_virtual : virtual Empty {};
+struct derived : polymorphic_base {};
+
+// CHECK: %struct.Holder1 = type { %struct.polymorphic_base }
+// CHECK: %struct.polymorphic_base = type { ptr }
+// CHECK: %struct.Holder2 = type { %struct.derived_virtual }
+// CHECK: %struct.derived_virtual = type { ptr }
+// CHECK: %struct.Holder3 = type { %struct.derived }
+// CHECK: %struct.derived = type { %struct.polymorphic_base }
+
+struct Holder1 {
+  polymorphic_base a{};
+} g_holder1;
+
+// CHECK: @{{.*}}Holder1{{.*}} = {{.*}} global %struct.Holder1 { %struct.polymorphic_base { ptr {{.*}} } }
+
+struct Holder2 {
+  derived_virtual a{};
+} g_holder2;
+
+// CHECK: @{{.*}}Holder2{{.*}} = {{.*}} global %struct.Holder2 zeroinitializer, align 8
+
+struct Holder3 {
+  derived a{};
+} g_holder3;
+
+// CHECK: @{{.*}}Holder3{{.*}} = {{.*}} global { { ptr } } { { ptr } { ptr {{.*}} } }