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

   1 /* { dg-do run } */
   2 /* { dg-options "-O2" } */
   3
   4 /* The ipa-split pass pulls the body of the if(!x) block
   5    into a separate function to make foo a better inlining
   6    candidate.  Make sure this new function isn't also run
   7    as a static constructor.  */
   8
   9 #include <stdlib.h>
  10
  11 int x, y;
  12
  13 void __attribute__((noinline))
  14 bar(void)
  15 {
  16   y++;
  17 }
  18
  19 void __attribute__((constructor))
  20 foo(void)
  21 {
  22   if (!x)
  23     {
  24       bar();
  25       y++;
  26     }
  27 }
  28
  29 int main()
  30 {
  31   x = 1;
  32   foo();
  33   foo();
  34   if (y != 2)
  35     abort();
  36   exit(0);
  37 }