gcc/testsuite/gcc.c-torture/compile/20070905-1.c

   1 /* PR tree-optimization/32772 */
   2
   3 struct S
   4 {
   5   unsigned long bits[1];
   6 };
   7
   8 void f1 (int, unsigned long *);
   9 int f2 (void);
  10 int f3 (int, unsigned long *);
  11 int f4 (int, unsigned long *);
  12
  13 static inline __attribute__ ((always_inline))
  14 void baz (int x, volatile struct S *y)
  15 {
  16   f1 (x, y->bits);
  17 }
  18
  19 static int
  20 bar (int x, struct S *y)
  21 {
  22   int n;
  23   if (__builtin_constant_p (x) ? f3 (x, y->bits) : f4 (x, y->bits))
  24     baz (x, y);
  25   for (n = f2 (); n < 8; n = f2 ())
  26     f3 (n, y->bits);
  27 }
  28
  29 void
  30 foo (int x, int y)
  31 {
  32   struct S m;
  33   while ((y = bar (x, &m)) >= 0);
  34 }