--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/pr83373.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,33 @@
+/* PR middle-end/83373 - False positive reported by -Wstringop-overflow
+   { dg-do compile }
+   { dg-options "-O2 -Wstringop-overflow" }  */
+
+typedef __SIZE_TYPE__ size_t;
+
+char buf[100];
+
+void get_data (char*);
+
+__attribute__ ((nonnull(1, 2)))
+inline char* my_strcpy (char* dst, const char* src, size_t size)
+{
+  size_t len = __builtin_strlen (src);
+  if (len < size)
+    __builtin_memcpy (dst, src, len + 1);
+  else
+    {
+      __builtin_memcpy (dst, src, size - 1); /* { dg-bogus "\\\[-Wstringop-oveflow]" } */
+      dst[size - 1] = '\0';
+    }
+
+  return dst;
+}
+
+void test(void)
+{
+  char data[20] = "12345";
+
+  get_data (data);
+
+  my_strcpy (buf, data, sizeof buf);
+}