gcc/testsuite/gcc.dg/20030805-1.c

   1 /* Test that gcc understands that the call to g might clobber i.  */
   2
   3 /* { dg-do run } */
   4 /* { dg-options "-O2" } */
   5
   6 __inline int f ()
   7 {
   8   static int i;
   9   int i2 = i;
  10   i = i2 + 1;
  11   return i;
  12 }
  13
  14 int g () { return f (); }
  15
  16 int main ()
  17 {
  18   if (f() != 1
  19       || g() != 2
  20       || f() != 3)
  21     return 1;
  22   return 0;
  23 }