gnu/dist/gcc4/gcc/testsuite/gcc.c-torture/execute/20030913-1.c

   1 /* Assignments via pointers pointing to global variables were being killed
   2    by SSA-DCE.  Test contributed by Paul Brook <paul@nowt.org>  */
   3
   4 int glob;
   5
   6 void
   7 fn2(int ** q)
   8 {
   9   *q = &glob;
  10 }
  11
  12 void test()
  13 {
  14   int *p;
  15
  16   fn2(&p);
  17
  18   *p=42;
  19 }
  20
  21 int main()
  22 {
  23   test();
  24   if (glob != 42) abort();
  25   exit (0);
  26 }