gcc/testsuite/gcc.dg/pr105676.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -Wsuggest-attribute=pure" } */
   3
   4 __attribute__((const))
   5 extern int do_expensive_calculation(void);
   6
   7 __attribute__((const))
   8 int getval(void) /* { dg-bogus "candidate for attribute" } */
   9 {
  10   static int cache = -1;
  11   if (cache == -1)
  12     cache = do_expensive_calculation();
  13   return cache;
  14 }