gcc/testsuite/gcc.dg/funcorder.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -funit-at-a-time" } */
   3 /* { dg-final { scan-assembler-not "link_error" } } */
   4 /*  In unit-at-time the functions should be assembled in order
   5     e q t main, so we realize that they are pure.  */
   6
   7 static int mem;
   8 static int e(void) __attribute__ ((noinline));
   9 static int q(void) __attribute__ ((noinline));
  10 static int t(void) __attribute__ ((noinline));
  11 main()
  12 {
  13         return t();
  14 }
  15 static t()
  16 {
  17         int r,e;
  18         if (mem)
  19                 t();
  20         e=mem;
  21         r=q();
  22         if (e!=mem)
  23                 link_error();
  24         return r;
  25 }
  26 static int e()
  27 {
  28         return 0;
  29 }
  30 static int q()
  31 {
  32         int t=mem,r;
  33         r=e();
  34         if (t!=mem)
  35                 link_error();
  36         return r;
  37 }