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

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