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 void link_error (void);
   8 static int mem;
   9 static int e(void) __attribute__ ((noinline));
  10 static int q(void) __attribute__ ((noinline));
  11 static int t(void) __attribute__ ((noinline));
  12 int
  13 main()
  14 {
  15         return t();
  16 }
  17 static int t()
  18 {
  19         int r,e;
  20         if (mem)
  21                 t();
  22         e=mem;
  23         r=q();
  24         if (e!=mem)
  25                 link_error();
  26         return r;
  27 }
  28 static int e()
  29 {
  30         return 0;
  31 }
  32 static int q()
  33 {
  34         int t=mem,r;
  35         r=e();
  36         if (t!=mem)
  37                 link_error();
  38         return r;
  39 }