basic-block.h: Changed basic block numbering so that the entry block is 0 and the exit block is 1.

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.



Co-Authored-By: Kenneth Zadeck <zadeck@naturalbridge.com>

From-SVN: r108713

1 files changed, 6 insertions, 6 deletions

diff --git a/gcc/cfgloop.c b/gcc/cfgloop.c
index ff97703..dabeacf 100644
--- a/gcc/cfgloop.c
+++ b/gcc/cfgloop.c
@@ -73,7 +73,7 @@ flow_loops_cfg_dump (const struct loops *loops, FILE *file)
   if (loops->cfg.dfs_order)
     {
       fputs (";; DFS order: ", file);
-      for (i = 0; i < n_basic_blocks; i++)
+      for (i = NUM_FIXED_BLOCKS; i < n_basic_blocks; i++)
 	fprintf (file, "%d ", loops->cfg.dfs_order[i]);
 
       fputs ("\n", file);
@@ -83,7 +83,7 @@ flow_loops_cfg_dump (const struct loops *loops, FILE *file)
   if (loops->cfg.rc_order)
     {
       fputs (";; RC order: ", file);
-      for (i = 0; i < n_basic_blocks; i++)
+      for (i = NUM_FIXED_BLOCKS; i < n_basic_blocks; i++)
 	fprintf (file, "%d ", loops->cfg.rc_order[i]);
 
       fputs ("\n", file);
@@ -610,7 +610,7 @@ flow_loops_find (struct loops *loops)
 
   /* 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 0;
 
   dfs_order = NULL;
@@ -676,7 +676,7 @@ flow_loops_find (struct loops *loops)
   loops->parray[0]->outer = NULL;
   loops->parray[0]->depth = 0;
   loops->parray[0]->pred = NULL;
-  loops->parray[0]->num_nodes = n_basic_blocks + 2;
+  loops->parray[0]->num_nodes = n_basic_blocks;
   loops->parray[0]->latch = EXIT_BLOCK_PTR;
   loops->parray[0]->header = ENTRY_BLOCK_PTR;
   ENTRY_BLOCK_PTR->loop_father = loops->parray[0];
@@ -704,7 +704,7 @@ flow_loops_find (struct loops *loops)
 
       num_loops = 1;
 
-      for (b = 0; b < n_basic_blocks; b++)
+      for (b = 0; b < n_basic_blocks - NUM_FIXED_BLOCKS; b++)
 	{
 	  struct loop *loop;
 	  edge_iterator ei;
@@ -804,7 +804,7 @@ get_loop_body (const struct loop *loop)
   if (loop->latch == EXIT_BLOCK_PTR)
     {
       /* There may be blocks unreachable from EXIT_BLOCK.  */
-      gcc_assert (loop->num_nodes == (unsigned) n_basic_blocks + 2);
+      gcc_assert (loop->num_nodes == (unsigned) n_basic_blocks);
       FOR_EACH_BB (bb)
 	tovisit[tv++] = bb;
       tovisit[tv++] = EXIT_BLOCK_PTR;