gcc/testsuite/gcc.dg/pr42389.c

   1 /* { dg-do compile { target powerpc*-*-* ia64-*-* i?86-*-* x86_64-*-* } } */
   2 /* { dg-options "-O2 -fselective-scheduling -fsel-sched-pipelining -fsched-pressure" } */
   3
   4 struct s_linked_f_pointer
   5 {
   6   struct s_linked_f_pointer *next;
   7   float *fptr;
   8 };
   9 struct s_trace
  10 {
  11   int index;
  12 };
  13 struct s_rr_cost
  14 {
  15   float base_cost;
  16   float acc_cost;
  17 };
  18 extern int num_nets;
  19 extern struct s_trace **trace_head;
  20 extern struct s_rr_cost *rr_cost;
  21 struct s_rr_route
  22 {
  23   float cost;
  24 };
  25 static int heap_tail;
  26 extern struct s_linked_f_pointer *rr_modified_head;
  27 extern struct s_rr_route *rr_route;
  28
  29 void
  30 empty_heap (void)
  31 {
  32   heap_tail = 1;
  33 }
  34
  35 void
  36 reset_path_costs (void)
  37 {
  38   struct s_linked_f_pointer *mod_ptr;
  39   if (rr_modified_head != ((void *) 0))
  40     {
  41       mod_ptr = rr_modified_head;
  42       while (mod_ptr->next != ((void *) 0))
  43         {
  44           *(mod_ptr->fptr) = 1.e30;
  45           mod_ptr = mod_ptr->next;
  46         }
  47       rr_modified_head = ((void *) 0);
  48     }
  49 }
  50
  51 static void
  52 route_net (int inet)
  53 {
  54   int i;
  55   for (i = 1; i < inet; i++)
  56     reset_path_costs ();
  57   empty_heap ();
  58   reset_path_costs ();
  59 }
  60
  61 void
  62 pathfinder_update_one_cost (int inet, float pres_fac, float acc_fac)
  63 {
  64   struct s_trace *tptr;
  65   int inode = 0;
  66
  67   tptr = trace_head[inet];
  68   inode = tptr->index;
  69   rr_route[inode].cost = rr_cost[inode].base_cost + rr_cost[inode].acc_cost;
  70 }
  71
  72 int
  73 try_route (int n, float x, float y)
  74 {
  75   int inet, itry;
  76   float pres_fac;
  77   for (itry = 1; itry <= n; itry++)
  78     {
  79       for (inet = 0; inet < num_nets; inet++)
  80         {
  81           route_net (inet);
  82           pathfinder_update_one_cost (inet, pres_fac, x);
  83         }
  84       pres_fac *= y;
  85     }
  86 }
  87