1335   block_t *blk;  in solve_flow_graph()  local
1385   for (ix = 0, blk = fn->blocks; ix != fn->num_blocks; ix++, blk++)  in solve_flow_graph()
1391       for (arc = blk->succ; arc; arc = arc->succ_next)  in solve_flow_graph()
1401 	      blk->num_succ--;  in solve_flow_graph()
1412 	  for (arc = blk->succ; arc; arc = arc->succ_next)  in solve_flow_graph()
1422 		if (blk->is_call_site && arc->fall_through  in solve_flow_graph()
1434 	  arc_t *start = blk->succ;  in solve_flow_graph()
1462 	  blk->succ = start;  in solve_flow_graph()
1467       blk->invalid_chain = 1;  in solve_flow_graph()
1468       blk->chain = invalid_blocks;  in solve_flow_graph()
1469       invalid_blocks = blk;  in solve_flow_graph()
1474       while ((blk = invalid_blocks))  in solve_flow_graph()
1479 	  invalid_blocks = blk->chain;  in solve_flow_graph()
1480 	  blk->invalid_chain = 0;  in solve_flow_graph()
1481 	  if (!blk->num_succ)  in solve_flow_graph()
1482 	    for (arc = blk->succ; arc; arc = arc->succ_next)  in solve_flow_graph()
1484 	  else if (!blk->num_pred)  in solve_flow_graph()
1485 	    for (arc = blk->pred; arc; arc = arc->pred_next)  in solve_flow_graph()
1490 	  blk->count = total;  in solve_flow_graph()
1491 	  blk->count_valid = 1;  in solve_flow_graph()
1492 	  blk->chain = valid_blocks;  in solve_flow_graph()
1493 	  blk->valid_chain = 1;  in solve_flow_graph()
1494 	  valid_blocks = blk;  in solve_flow_graph()
1496       while ((blk = valid_blocks))  in solve_flow_graph()
1501 	  valid_blocks = blk->chain;  in solve_flow_graph()
1502 	  blk->valid_chain = 0;  in solve_flow_graph()
1503 	  if (blk->num_succ == 1)  in solve_flow_graph()
1507 	      total = blk->count;  in solve_flow_graph()
1509 	      for (arc = blk->succ; arc; arc = arc->succ_next)  in solve_flow_graph()
1518 	      blk->num_succ--;  in solve_flow_graph()
1539 	  if (blk->num_pred == 1)  in solve_flow_graph()
1543 	      total = blk->count;  in solve_flow_graph()
1545 	      for (arc = blk->pred; arc; arc = arc->pred_next)  in solve_flow_graph()
1554 	      blk->num_pred--;  in solve_flow_graph()