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

   1 /* { dg-do run } */
   2 /* { dg-options "-O2" } */
   3 /* { dg-skip-if "" { ! global_constructor } } */
   4
   5 /* The ipa-split pass pulls the body of the if(!x) block
   6    into a separate function to make foo a better inlining
   7    candidate.  Make sure this new function isn't also run
   8    as a static constructor.  */
   9
  10 #include <stdlib.h>
  11
  12 int x, y;
  13
  14 void __attribute__((noinline))
  15 bar(void)
  16 {
  17   y++;
  18 }
  19
  20 void __attribute__((constructor))
  21 foo(void)
  22 {
  23   if (!x)
  24     {
  25       bar();
  26       y++;
  27     }
  28 }
  29
  30 int main()
  31 {
  32   x = 1;
  33   foo();
  34   foo();
  35   if (y != 2)
  36     abort();
  37   exit(0);
  38 }