2005-12-17 Danny Berlin <dberlin@dberlin.org>

	    Kenneth Zadeck <zadeck@naturalbridge.com>

	* basic-block.h: Changed basic block numbering so that the entry
	block is 0 and the exit block is 1.  Changed insn iterators so
	that they are tolerant of blocks with no insns.
	* regrename.c (copyprop_hardreg_forward): Changed basic block
	numbering so that the entry block is 0 and the exit block is 1.
	* sched-ebb.c (sehedule_ebbs): Ditto.
	* tracer.c (branch_ratio_cutoff): Ditto.
	* cfgloopmanip.c (fix_loop_structure): Ditto.
	* cfghooks.c (verify_flow_info): Ditto.
	* cfg.c (compact_blocks): Ditto.
	* reorg.c (dbr_schedule): Ditto.
	* flow.c (calculate_global_regs_live, libcall_dead_p): Ditto.
	* dominance.c (calc_dfs_tree_nonrec, calc_dfs_tree,
	calculate_dominance_info): Ditto.
	* cfganal.c (create_edge_list, print_edge_list,
	flow_depth_first_order_compute, flow_dfs_compute_reverse_init,
	flow_dfs_compute_reverse_add_bb, flow_dfs_compute_reverse_execute,
	dfs_enumerate_from): Ditto.
	* global.c (global_alloc, set_up_bb_rts_numbers): Ditto.
	* ifcvt.c (find_if_case_2): Ditto.
	* cfgbuild.c (control_flow_insn_p, count_basic_blocks,
	find_basic_blocks): Ditto.
	* predict.c (predict_loops, tree_bb_level_predictions,
	predict_paths_leading_to, propagate_freq): Ditto.
	* lcm.c (compute_antinout_edge, compute_laterin,
	compute_available): Ditto.
	* function.c (thread_prologue_and_epilogue_insns): Ditto.
	* gcse.c (gcse_main, bypass_jumps): Ditto.
	* profile.c (compute_branch_probabilities,
	compute_value_histograms, branch_prob): Ditto.
	* tree-flow-inline.h (bsi_start, bsi_after_labels,
	bsi_last): Ditto.
	* tree-ssa-phiopt.c (tree_ssa_phiopt,
	blocks_in_phiopt_order): Ditto.
	* bt-load.c (compute_defs_uses_and_gen, compute_kill,
	compute_out, link_btr_uses, migrate_btr_defs): Ditto.
	* tree-dfa.c (collect_dfa_stats): Ditto.
	* cfgcleanup.c (try_forward_edges, try_optimize_cfg): Ditto.
	* cfglayout.c (fixup_reorder_chain): Ditto.
	* bb-reorder.c (reorder_basic_blocks, duplicate_computed_gotos,
	partition_hot_cold_basic_blocks): Ditto.
	* var-tracking.c (vt_find_locations): Ditto.
	* cfgloop.c (flow_loops_cfg_dump, flow_loops_find, get_loop_body): Ditto.
	* sched-rgn.c (compute_trg_info, init_regions, schedule_insns): Ditto.
	* tree-cfg.c (init_empty_tree_cfg, build_tree_cfg, make_edges
	label_to_block_fn, print_loop_ir, tree_flow_call_edges_add): Ditto.
	* tree-ssa-reassoc.c (init_reassoc): Ditto.
	* cfgrtl.c (entry_of_function, rtl_verify_flow_info,
	rtl_flow_call_edges_add, rtl_flow_call_edges_add): Ditto.
	* df.c (df_analyze_1, hybrid_search, iterative_dataflow): Ditto
	and removed unused reverse orders.
	* df.h (): Ditto.
	* combine.c: Fix document typo.




git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@108713 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 5 insertions, 9 deletions

diff --git a/gcc/sched-rgn.c b/gcc/sched-rgn.c
index 69bd3598576..f66966d6adf 100644
--- a/gcc/sched-rgn.c
+++ b/gcc/sched-rgn.c
@@ -999,7 +999,7 @@ compute_trg_info (int trg)
   sp->is_speculative = 0;
   sp->src_prob = 100;
 
-  visited = sbitmap_alloc (last_basic_block - (INVALID_BLOCK + 1));
+  visited = sbitmap_alloc (last_basic_block);
 
   for (i = trg + 1; i < current_nr_blocks; i++)
     {
@@ -1044,8 +1044,7 @@ compute_trg_info (int trg)
 	      block = el.first_member[j]->src;
 	      FOR_EACH_EDGE (e, ei, block->succs)
 		{
-		  if (!TEST_BIT (visited,
-				 e->dest->index - (INVALID_BLOCK + 1)))
+		  if (!TEST_BIT (visited, e->dest->index))
 		    {
 		      for (k = 0; k < el.nr_members; k++)
 			if (e == el.first_member[k])
@@ -1054,8 +1053,7 @@ compute_trg_info (int trg)
 		      if (k >= el.nr_members)
 			{
 			  bblst_table[bblst_last++] = e->dest;
-			  SET_BIT (visited,
-				   e->dest->index - (INVALID_BLOCK + 1));
+			  SET_BIT (visited, e->dest->index);
 			  update_idx++;
 			}
 		    }
@@ -2469,7 +2467,7 @@ init_regions (void)
 
   /* Compute regions for scheduling.  */
   if (reload_completed
-      || n_basic_blocks == 1
+      || n_basic_blocks == NUM_FIXED_BLOCKS + 1
       || !flag_schedule_interblock
       || is_cfg_nonregular ())
     {
@@ -2526,18 +2524,16 @@ schedule_insns (FILE *dump_file)
 
   /* Taking care of this degenerate case makes the rest of
      this code simpler.  */
-  if (n_basic_blocks == 0)
+  if (n_basic_blocks == NUM_FIXED_BLOCKS)
     return;
 
   nr_inter = 0;
   nr_spec = 0;
-
   sched_init (dump_file);
 
   init_regions ();
 
   current_sched_info = &region_sched_info;
-
   /* Schedule every region in the subroutine.  */
   for (rgn = 0; rgn < nr_regions; rgn++)
     schedule_region (rgn);