gcc/testsuite/gcc.dg/ipa/pr105739.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3
   4
   5 __attribute__((noinline))
   6 static int
   7 test2(int a)
   8 {
   9         if (__builtin_constant_p (a))
  10                 __builtin_abort ();
  11         return a;
  12 }
  13 static int
  14 test(int *a)
  15 {
  16         int val = *(volatile int *)a;
  17         if (__builtin_constant_p (val))
  18                 __builtin_abort ();
  19         if (val)
  20           return test2(val);
  21         return 0;
  22 }
  23 int a;
  24 int
  25 main()
  26 {
  27         a = 0;
  28         return test (&a);
  29 }
  30 /* { dg-final { scan-tree-dump "test2" "optimized" } } */