1  /* PR middle-end/93829 - bogus -Wstringop-overflow on memcpy of a struct
       2     with a pointer member from another with a long string
       3     { dg-do compile }
       4     { dg-options "-O2 -Wall" } */
       5  
       6  extern void* memcpy (void*, const void*, __SIZE_TYPE__);
       7  
       8  #define S40 "0123456789012345678901234567890123456789"
       9  
      10  const char s40[] = S40;
      11  
      12  struct S
      13  {
      14    const void *p, *q, *r;
      15  } s, sa[2];
      16  
      17  
      18  void test_lit_decl (void)
      19  {
      20    struct S t = { 0, S40, 0 };
      21  
      22    memcpy (&s, &t, sizeof t);    // { dg-bogus "-Wstringop-overflow" }
      23  }
      24  
      25  void test_str_decl (void)
      26  {
      27    struct S t = { 0, s40, 0 };
      28  
      29    memcpy (&s, &t, sizeof t);    // { dg-bogus "-Wstringop-overflow" }
      30  }
      31  
      32  
      33  void test_lit_ssa (int i)
      34  {
      35    if (i < 1)
      36      i = 1;
      37    struct S *p = &sa[i];
      38    struct S t = { 0, S40, 0 };
      39  
      40    memcpy (p, &t, sizeof t);    // { dg-bogus "-Wstringop-overflow" }
      41  }
      42  
      43  void test_str_ssa (int i)
      44  {
      45    if (i < 1)
      46      i = 1;
      47    struct S *p = &sa[i];
      48    struct S t = { 0, s40, 0 };
      49  
      50    memcpy (p, &t, sizeof t);    // { dg-bogus "-Wstringop-overflow" }
      51  }