gcc/testsuite/gcc.dg/torture/pr39074.c

   1 /* { dg-do run } */
   2 /* { dg-options "-fdump-tree-alias" } */
   3 /* { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */
   4
   5 int i;
   6 void __attribute__((noinline))
   7 foo(long b, long q)
   8 {
   9   int *y;
  10   int **a = &y, **x;
  11   int ***p;
  12   if (b)
  13     p = (int ***)q;
  14   else
  15     p = &a;
  16   x = *p;
  17   *x = &i;  /* *ANYTHING = &i has to make sure that y points to i.  */
  18   *y = 0;
  19 }
  20 extern void abort (void);
  21 int main()
  22 {
  23   i = 1;
  24   foo (0, 0);
  25   if (i != 0)
  26     abort ();
  27   return 0;
  28 }
  29
  30 /* { dg-final { scan-tree-dump "y.._., points-to vars: { i }" "alias" } } */
  31 /* { dg-final { cleanup-tree-dump "alias" } } */