diff --git a/clang/test/CodeGen/object-size.c b/clang/test/CodeGen/object-size.c
--- a/clang/test/CodeGen/object-size.c
+++ b/clang/test/CodeGen/object-size.c
@@ -525,6 +525,18 @@
   gi = OBJECT_SIZE_BUILTIN(&dsv[9].snd[0], 1);
 }
 
+// CHECK-LABEL: @test32
+static struct DynStructVar D = {
+  .fst = {},
+  .snd = { 0, 1, 2, },
+};
+unsigned long test32(void) {
+  // FIXME: GCC returns the sizeof the base type, plus the number of bytes from
+  // members of the initializer of the flexible array: 19.
+  // CHECK: ret i64 16
+  return __builtin_object_size(&D, 1);
+}
+
 // CHECK-LABEL: @PR30346
 void PR30346(void) {
   struct sa_family_t {};