gcc/testsuite/gcc.dg/tree-ssa/20040326-1.c

   1 /* { dg-options "-O2 -fno-inline-functions" } */
   2 /* { dg-do run } */
   3 /* When there are no call-clobbered variables, we should still create
   4    a .GLOBAL_VAR to model the side effects of functions.  Without it,
   5    we were moving the call to Faref() inside the second call to
   6    Faset().  */
   7 extern void abort (void);
   8 extern void exit (int);
   9
  10 main ()
  11 {
  12   int table, c, elt;
  13   int tem = Faref (table, elt);
  14   Faset (table, elt, c);
  15   Faset (table, c, tem);/* tem cannot be replaced with Faref (table, elt) */
  16   exit (0);
  17 }
  18
  19 int j = 0;
  20
  21 int __attribute__ ((noinline)) Faref (table, elt)
  22 {
  23   j = 1;
  24   return 0;
  25 }
  26
  27 int __attribute__ ((noinline)) Faset (table, elt, c)
  28 {
  29   if (j != 1)
  30     abort ();
  31   return 0;
  32 }