gcc/testsuite/gcc.dg/20041219-1.c

   1 /* PR18191 Struct member is not getting default-initialized.
   2    Origin: Grigory Zagorodnev  <grigory.zagorodnev@intel.com>  */
   3
   4 /* { dg-do run } */
   5
   6 extern int printf (__const char *__restrict __format, ...);
   7
   8 typedef struct S {
   9   const char* s;
  10   int         i;
  11 } S;
  12
  13 void
  14 foo (void)
  15 {
  16   S dummy[2];
  17   unsigned i;
  18
  19   /* Put some garbage on the stack.  */
  20   for (i = 0; i < sizeof(dummy); i++)
  21     ((char *)&dummy)[i] = -1;
  22 }
  23
  24 int
  25 bar (void)
  26 {
  27   /* Allocate object on the stack.  */
  28   S obj[2] = { {"m0"}, {"m1"} };
  29
  30   /* Assume fields those not explicitly initialized
  31      are default initialized to 0 [8.5.1/7 and 8.5/5].  */
  32   if (obj[0].i == 0)
  33     return 0;
  34   else
  35     {
  36       printf("Failed: obj[0].i == '%d', expecting '0'\n", obj[0].i);
  37       return 1;
  38     }
  39 }
  40
  41 int
  42 main (void)
  43 {
  44   foo();
  45   return bar();
  46 }
  47