gcc/testsuite/gcc.dg/20050527-1.c

   1 /* PR c/21536 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2 -Wuninitialized" } */
   4
   5 typedef __SIZE_TYPE__ size_t;
   6 extern void *malloc (size_t);
   7 extern void free (void *);
   8
   9 void *
  10 foo (int x, int y)
  11 {
  12   void *d = malloc (x * y * sizeof (double));
  13   double (*e)[x][y] = d;
  14   x += 10;
  15   y += 10;
  16   if (x > 18)
  17     (*e)[x - 12][y - 12] = 0.0;
  18   else
  19     (*e)[x - 11][y - 11] = 1.0;
  20   return d;
  21 }
  22
  23 void *
  24 bar (int x, int y)
  25 {
  26   void *d = malloc (x * y * sizeof (double));
  27   struct S
  28     {
  29       double (*e)[x][y];
  30       double (*f)[x][y];
  31     } s;
  32   s.e = d;
  33   s.f = d;
  34   x += 10;
  35   y += 10;
  36   if (x > 18)
  37     (*s.e)[x - 12][y - 12] = 0.0;
  38   else
  39     (*s.e)[x - 11][y - 11] = 1.0;
  40   if (x > 16)
  41     (*s.f)[x - 13][y - 13] = 0.0;
  42   else
  43     (*s.f)[x - 14][y - 14] = 1.0;
  44   return d;
  45 }
  46
  47 int
  48 main ()
  49 {
  50   void *d1 = foo (10, 10);
  51   void *d2 = bar (10, 10);
  52   free (d1);
  53   free (d2);
  54   return 0;
  55 }