gcc/testsuite/gcc.c-torture/execute/ipa-sra-2.c

   1 /* { dg-require-effective-target int32plus } */
   2 struct big
   3 {
   4   int data[1000000];
   5 };
   6
   7 struct small
   8 {
   9   int data[10];
  10 };
  11
  12 union both
  13 {
  14   struct big big;
  15   struct small small;
  16 };
  17
  18 extern void *calloc (__SIZE_TYPE__, __SIZE_TYPE__);
  19 extern void free (void *);
  20
  21 static int __attribute__((noinline))
  22 foo (int fail, union both *agg)
  23 {
  24   int r;
  25   if (fail)
  26     r = agg->big.data[999999];
  27   else
  28     r = agg->small.data[0];
  29   return r;
  30 }
  31
  32 int main (int argc, char *argv[])
  33 {
  34   union both *agg = calloc (1, sizeof (struct small));
  35   int r;
  36
  37   r = foo ((argc > 2000), agg);
  38
  39   free (agg);
  40   return r;
  41 }