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, 5 deletions

diff --git a/gcc/bb-reorder.c b/gcc/bb-reorder.c
index 40d0cdf676e..f46b2cf871e 100644
--- a/gcc/bb-reorder.c
+++ b/gcc/bb-reorder.c
@@ -1894,7 +1894,7 @@ reorder_basic_blocks (unsigned int flags)
   int i;
   struct trace *traces;
 
-  if (n_basic_blocks <= 1)
+  if (n_basic_blocks <= NUM_FIXED_BLOCKS + 1)
     return;
 
   if (targetm.cannot_modify_jumps_p ())
@@ -1986,7 +1986,7 @@ duplicate_computed_gotos (void)
   bitmap candidates;
   int max_size;
 
-  if (n_basic_blocks <= 1)
+  if (n_basic_blocks <= NUM_FIXED_BLOCKS + 1)
     return;
 
   if (targetm.cannot_modify_jumps_p ())
@@ -2169,7 +2169,7 @@ partition_hot_cold_basic_blocks (void)
   int n_crossing_edges;
   int max_edges = 2 * last_basic_block;
   
-  if (n_basic_blocks <= 1)
+  if (n_basic_blocks <= NUM_FIXED_BLOCKS + 1)
     return;
   
   crossing_edges = xcalloc (max_edges, sizeof (edge));
@@ -2177,8 +2177,8 @@ partition_hot_cold_basic_blocks (void)
   cfg_layout_initialize (0);
   
   FOR_EACH_BB (cur_bb)
-    if (cur_bb->index >= 0
- 	&& cur_bb->next_bb->index >= 0)
+    if (cur_bb->index >= NUM_FIXED_BLOCKS
+ 	&& cur_bb->next_bb->index >= NUM_FIXED_BLOCKS)
       cur_bb->aux = cur_bb->next_bb;
   
   find_rarely_executed_basic_blocks_and_crossing_edges (crossing_edges,