--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/init/array53.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,33 @@
+// PR c++/90947 - Simple lookup table of array of strings is miscompiled
+// Verify that initializers for arrays of elements of a class type with
+// "unusual" data members are correctly recognized as non-zero.
+// { dg-do compile }
+// { dg-options "-O1 -fdump-tree-optimized" }
+
+struct S
+{
+  const char *p;
+  static int i;
+  enum { e };
+  typedef int X;
+  int: 1, b:1;
+  union {
+    int c;
+  };
+  const char *q;
+};
+
+void f (void)
+{
+  const struct S a[2] =
+    {
+     { /* .p = */ "", /* .b = */ 0, /* .c = */ 0, /* .q = */ "" },
+     { /* .p = */ "", /* .b = */ 0, /* .c = */ 0, /* .q = */ "" }
+    };
+
+  if (!a[0].p || *a[0].p || !a[0].q || *a[0].q
+      || !a[1].p || *a[1].p || !a[1].q || *a[1].q)
+    __builtin_abort ();
+}
+
+// { dg-final { scan-tree-dump-not "abort" "optimized" } }