gcc/testsuite/gcc.dg/Wstringop-overflow-pr106904.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -Wstringop-overflow -fno-vect-cost-model" } */
   3
   4 struct windowpos
   5 {
   6   int hwnd;
   7   int hwnd2;
   8 };
   9
  10 struct packed_windowpos
  11 {
  12   int hwnd;
  13   int pad1;
  14   int hwnd2;
  15   int pad2;
  16 };
  17
  18 struct packed_structs
  19 {
  20   struct packed_windowpos wp;
  21 };
  22
  23 void func(struct packed_structs *ps)
  24 {
  25   struct windowpos wp;
  26
  27   wp.hwnd = ps->wp.hwnd;
  28   wp.hwnd2 = ps->wp.hwnd2;
  29   __builtin_memcpy(&ps->wp, &wp, sizeof(wp)); /* { dg-bogus "into a region" } */
  30 }