--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/Wstringop-overflow-32.c	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,51 @@
+/* PR middle-end/93829 - bogus -Wstringop-overflow on memcpy of a struct
+   with a pointer member from another with a long string
+   { dg-do compile }
+   { dg-options "-O2 -Wall" } */
+
+extern void* memcpy (void*, const void*, __SIZE_TYPE__);
+
+#define S40 "0123456789012345678901234567890123456789"
+
+const char s40[] = S40;
+
+struct S
+{
+  const void *p, *q, *r;
+} s, sa[2];
+
+
+void test_lit_decl (void)
+{
+  struct S t = { 0, S40, 0 };
+
+  memcpy (&s, &t, sizeof t);    // { dg-bogus "-Wstringop-overflow" }
+}
+
+void test_str_decl (void)
+{
+  struct S t = { 0, s40, 0 };
+
+  memcpy (&s, &t, sizeof t);    // { dg-bogus "-Wstringop-overflow" }
+}
+
+
+void test_lit_ssa (int i)
+{
+  if (i < 1)
+    i = 1;
+  struct S *p = &sa[i];
+  struct S t = { 0, S40, 0 };
+
+  memcpy (p, &t, sizeof t);    // { dg-bogus "-Wstringop-overflow" }
+}
+
+void test_str_ssa (int i)
+{
+  if (i < 1)
+    i = 1;
+  struct S *p = &sa[i];
+  struct S t = { 0, s40, 0 };
+
+  memcpy (p, &t, sizeof t);    // { dg-bogus "-Wstringop-overflow" }
+}