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, 8 insertions, 6 deletions

diff --git a/gcc/profile.c b/gcc/profile.c
index d260d66e106..45abbc40926 100644
--- a/gcc/profile.c
+++ b/gcc/profile.c
@@ -531,7 +531,7 @@ compute_branch_probabilities (void)
 	{
 	  FOR_EACH_EDGE (e, ei, bb->succs)
 	    e->probability = (e->count * REG_BR_PROB_BASE + bb->count / 2) / bb->count;
-	  if (bb->index >= 0
+	  if (bb->index >= NUM_FIXED_BLOCKS
 	      && block_ends_with_condjump_p (bb)
 	      && EDGE_COUNT (bb->succs) >= 2)
 	    {
@@ -609,7 +609,7 @@ compute_branch_probabilities (void)
 	      FOR_EACH_EDGE (e, ei, bb->succs)
 		e->probability = REG_BR_PROB_BASE / total;
 	    }
-	  if (bb->index >= 0
+	  if (bb->index >= NUM_FIXED_BLOCKS
 	      && block_ends_with_condjump_p (bb)
 	      && EDGE_COUNT (bb->succs) >= 2)
 	    num_branches++, num_never_executed;
@@ -704,7 +704,9 @@ compute_value_histograms (histogram_values values)
       free (histogram_counts[t]);
 }
 
-#define BB_TO_GCOV_INDEX(bb)  ((bb)->index + 1)
+/* The entry basic block will be moved around so that it has index=1,
+   there is nothing at index 0 and the exit is at n_basic_block.  */
+#define BB_TO_GCOV_INDEX(bb)  ((bb)->index - 1)
 /* When passed NULL as file_name, initialize.
    When passed something else, output the necessary commands to change
    line to LINE and offset to FILE_NAME.  */
@@ -917,7 +919,7 @@ branch_prob (void)
 	num_instrumented++;
     }
 
-  total_num_blocks += n_basic_blocks + 2;
+  total_num_blocks += n_basic_blocks;
   if (dump_file)
     fprintf (dump_file, "%d basic blocks\n", n_basic_blocks);
 
@@ -938,7 +940,7 @@ branch_prob (void)
       gcov_position_t offset;
 
       offset = gcov_write_tag (GCOV_TAG_BLOCKS);
-      for (i = 0; i != (unsigned) (n_basic_blocks + 2); i++)
+      for (i = 0; i != (unsigned) (n_basic_blocks); i++)
 	gcov_write_unsigned (0);
       gcov_write_length (offset);
     }
@@ -946,7 +948,7 @@ branch_prob (void)
    /* Keep all basic block indexes nonnegative in the gcov output.
       Index 0 is used for entry block, last index is for exit block.
       */
-  ENTRY_BLOCK_PTR->index = -1;
+  ENTRY_BLOCK_PTR->index = 1;
   EXIT_BLOCK_PTR->index = last_basic_block;
 
   /* Arcs */