gcc/testsuite/gcc.dg/20090922-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -g -funroll-loops -std=gnu99" } */
   3
   4 struct S
   5 {
   6   unsigned long s1;
   7   int **s2;
   8 };
   9 struct T
  10 {
  11   unsigned long t1, t2;
  12 };
  13 struct U
  14 {
  15   int u1, u2;
  16   unsigned long u3;
  17 };
  18 struct V
  19 {
  20   int v1, v3;
  21   struct T *v2;
  22   struct U *v4;
  23 };
  24 struct W
  25 {
  26   int w1;
  27   struct V **w2;
  28 };
  29 struct S *foo1 (void);
  30 int *foo2 (void);
  31
  32 void
  33 test (struct W *w)
  34 {
  35   for (int i = 0; i < w->w1; i++)
  36     {
  37       struct V *v = w->w2[i];
  38       struct S *t = foo1 ();
  39       if (!t)
  40         for (int j; j < v->v1;)
  41           {
  42             struct T *q = &v->v2[j];
  43             t += (q->t2 - q->t1) * 45000L;
  44           }
  45       for (; v->v3;)
  46         {
  47           struct U *v4 = (struct U *) &v->v4;
  48           if (v4->u1 && v4->u2 >= 0 && v4->u2)
  49             {
  50               int *s = foo2 ();
  51               if (!s)
  52                 for (int k = 0; k <= v4->u2; k++)
  53                   {
  54                     struct T *q = &v->v2[k];
  55                     if (k == v4->u2)
  56                       v4->u3 += (q->t1) * 1000000;
  57                   }
  58               t->s2[t->s1] = s;
  59             }
  60         }
  61       int *s = foo2 ();
  62       if (!t)
  63         t->s2[t->s1] = s;
  64     }
  65 }