gcc/testsuite/gcc.dg/pr51491-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-ccp1" } */
   3
   4 int g (int *);
   5
   6 int
   7 f (int n)
   8 {
   9   int tt = 0;
  10   int t = 4;
  11   {
  12     int a[t
  13           + (tt != 0 ? 6 : 0)
  14          ];
  15     tt = g (a);
  16     {
  17       int b[n];
  18       tt += g (b);
  19       if (n > 20)
  20         tt += 148 * g (b);
  21       tt += b[0];
  22     }
  23     tt += a[0];
  24   }
  25   {
  26     int a[4];
  27     tt += g (a);
  28     tt += a[0];
  29   }
  30   return tt;
  31 }
  32
  33 /* { dg-final { scan-tree-dump-times "CLOBBER" 2 "ccp1"} } */
  34 /* { dg-final { cleanup-tree-dump "ccp1" } } */