basic-block.h (single_succ_p, [...]): New inline functions.

	* basic-block.h (single_succ_p, single_pred_p, single_succ_edge,
	single_pred_edge, single_succ, single_pred): New inline functions.
	* bb-reorder.c (rotate_loop, find_traces_1_round,
	add_labels_and_missing_jumps, fix_up_fall_thru_edges,
	duplicate_computed_gotos): Use the single_succ/pred functions.
	* cfganal.c (forwarder_block_p): Ditto.
	* cfgbuild.c (compute_outgoing_frequencies): Ditto.
	* cfgcleanup.c (try_simplify_condjump, try_forward_edges,
	outgoing_edges_match, try_crossjump_to_edge, try_optimize_cfg,
	merge_seq_blocks): Ditto.
	* cfghooks.c (split_edge, tidy_fallthru_edges): Ditto.
	* cfglayout.c (fixup_reorder_chain): Ditto.
	* cfgloop.c (mark_single_exit_loops, update_latch_info,
	canonicalize_loop_headers, verify_loop_structure): Ditto.
	* cfgloopmanip.c (remove_path, unloop, loop_delete_branch_edge,
	mfb_update_loops, create_preheader, force_single_succ_latches,
	create_loop_notes): Ditto.
	* cfgrtl.c (rtl_can_merge_blocks, try_redirect_by_replacing_jump,
	force_nonfallthru_and_redirect, rtl_tidy_fallthru_edge,
	commit_one_edge_insertion, purge_dead_edges,
	cfg_layout_can_merge_blocks_p): Ditto.
	* except.c (sjlj_emit_function_enter): Ditto.
	* flow.c (init_propagate_block_info): Ditto.
	* function.c (thread_prologue_and_epilogue_insns): Ditto.
	* gcse.c (find_implicit_sets, bypass_conditional_jumps,
	insert_insn_end_bb): Ditto.
	* ifcvt.c (merge_if_block, find_if_block, find_if_case_1,
	find_if_case_2): Ditto.
	* lambda-code.c (perfect_nestify): Ditto.
	* lcm.c (optimize_mode_switching): Ditto.
	* loop-doloop.c (doloop_modify): Ditto.
	* loop-init.c (loop_optimizer_init): Ditto.
	* loop-iv.c (simplify_using_initial_values): Ditto.
	* loop-unroll.c (unroll_loop_runtime_iterations): Ditto.
	* loop-unswitch.c (unswitch_loop): Ditto.
	* modulo-sched.c (generate_prolog_epilog): Ditto.
	* predict.c (combine_predictions_for_insn, estimate_probability,
	tree_estimate_probability, last_basic_block_p,
	estimate_bb_frequencies): Ditto.
	* profile.c (branch_prob): Ditto.
	* regrename.c (copyprop_hardreg_forward): Ditto.
	* sched-rgn.c (is_cfg_nonregular, find_rgns, update_live): Ditto.
	* tracer.c (layout_superblocks): Ditto.
	* tree-cfg.c (tree_can_merge_blocks_p, tree_merge_blocks,
	cfg_remove_useless_stmts_bb, cleanup_control_flow,
	cleanup_control_expr_graph, disband_implicit_edges,
	tree_find_edge_insert_loc, bsi_commit_edge_inserts,
	tree_verify_flow_info, tree_make_forwarder_block,
	tree_forwarder_block_p, remove_forwarder_block,
	remove_forwarder_block_with_phi, merge_phi_nodes): Ditto.
	* tree-if-conv.c (tree_if_conversion): Ditto.
	* tree-mudflap.c (mf_build_check_statement_for): Ditto.
	* tree-ssa-dce.c (remove_dead_stmt): Ditto.
	* tree-ssa-dom.c (dom_opt_finalize_block): Ditto.
	* tree-ssa-loop-ch.c (should_duplicate_loop_header_p,
	copy_loop_headers): Ditto.
	* tree-ssa-loop-im.c (loop_commit_inserts): Ditto.
	* tree-ssa-loop-ivopts.c (compute_phi_arg_on_exit): Ditto.
	* tree-ssa-loop-manip.c (split_loop_exit_edge, ip_normal_pos,
	lv_adjust_loop_entry_edge, tree_ssa_loop_version): Ditto.
	* tree-ssa-loop-niter.c (simplify_using_initial_conditions): Ditto.
	* tree-ssa-loop-unswitch.c (simplify_using_entry_checks): Ditto.
	* tree-ssa-phiopt.c (tree_ssa_phiopt, value_replacement): Ditto.
	* tree-ssa-pre.c (compute_antic_aux, insert_aux, init_pre): Ditto.
	* tree-ssa-threadupdate.c (redirect_edges): Ditto.
	* tree-tailcall.c (independent_of_stmt_p, find_tail_calls,
	eliminate_tail_call, tree_optimize_tail_calls_1): Ditto.
	* tree-vect-analyze.c (vect_analyze_loop_form): Ditto.
	* tree-vect-transform.c (vect_update_ivs_after_vectorizer): Ditto.
	* tree-vectorizer.c (slpeel_update_phi_nodes_for_guard,
	slpeel_add_loop_guard): Ditto.

From-SVN: r96292

1 files changed, 18 insertions, 19 deletions

diff --git a/gcc/bb-reorder.c b/gcc/bb-reorder.c
index 0bc2f91..a94c9e4 100644
--- a/gcc/bb-reorder.c
+++ b/gcc/bb-reorder.c
@@ -385,18 +385,16 @@ rotate_loop (edge back_edge, struct trace *trace, int trace_n)
 	  prev_bb->rbi->next = best_bb->rbi->next;
 
 	  /* Try to get rid of uncond jump to cond jump.  */
-	  if (EDGE_COUNT (prev_bb->succs) == 1)
+	  if (single_succ_p (prev_bb))
 	    {
-	      basic_block header = EDGE_SUCC (prev_bb, 0)->dest;
+	      basic_block header = single_succ (prev_bb);
 
 	      /* Duplicate HEADER if it is a small block containing cond jump
 		 in the end.  */
 	      if (any_condjump_p (BB_END (header)) && copy_bb_p (header, 0)
 		  && !find_reg_note (BB_END (header), REG_CROSSING_JUMP, 
 				     NULL_RTX))
-		{
-		  copy_bb (header, EDGE_SUCC (prev_bb, 0), prev_bb, trace_n);
-		}
+		copy_bb (header, single_succ_edge (prev_bb), prev_bb, trace_n);
 	    }
 	}
     }
@@ -655,7 +653,7 @@ find_traces_1_round (int branch_th, int exec_th, gcov_type count_th,
 			{
 			  /* The loop has less than 4 iterations.  */
 
-			  if (EDGE_COUNT (bb->succs) == 1
+			  if (single_succ_p (bb)
 			      && copy_bb_p (best_edge->dest, !optimize_size))
 			    {
 			      bb = copy_bb (best_edge->dest, best_edge, bb,
@@ -695,12 +693,13 @@ find_traces_1_round (int branch_th, int exec_th, gcov_type count_th,
 			&& (e->flags & EDGE_CAN_FALLTHRU)
 			&& !(e->flags & EDGE_COMPLEX)
 			&& !e->dest->rbi->visited
-			&& EDGE_COUNT (e->dest->preds) == 1
+			&& single_pred_p (e->dest)
 			&& !(e->flags & EDGE_CROSSING)
-			&& EDGE_COUNT (e->dest->succs) == 1
-			&& (EDGE_SUCC (e->dest, 0)->flags & EDGE_CAN_FALLTHRU)
-			&& !(EDGE_SUCC (e->dest, 0)->flags & EDGE_COMPLEX)
-			&& EDGE_SUCC (e->dest, 0)->dest == best_edge->dest
+			&& single_succ_p (e->dest) == 1
+			&& (single_succ_edge (e->dest)->flags
+			    & EDGE_CAN_FALLTHRU)
+			&& !(single_succ_edge (e->dest)->flags & EDGE_COMPLEX)
+			&& single_succ (e->dest) == best_edge->dest
 			&& 2 * e->dest->frequency >= EDGE_FREQUENCY (best_edge))
 		      {
 			best_edge = e;
@@ -1391,7 +1390,7 @@ add_labels_and_missing_jumps (edge *crossing_edges, int n_crossing_edges)
  		    /* bb just falls through.  */
  		    {
  		      /* make sure there's only one successor */
-		      gcc_assert (EDGE_COUNT (src->succs) == 1);
+		      gcc_assert (single_succ_p (src));
 		      
 		      /* Find label in dest block.  */
 		      label = block_label (dest);
@@ -1533,7 +1532,7 @@ fix_up_fall_thru_edges (void)
 			 partition as bb it's falling through from.  */
 
 		      BB_COPY_PARTITION (new_bb, cur_bb);
-		      EDGE_SUCC (new_bb, 0)->flags |= EDGE_CROSSING;
+		      single_succ_edge (new_bb)->flags |= EDGE_CROSSING;
  		    }
 		  
  		  /* Add barrier after new jump */
@@ -2085,17 +2084,17 @@ duplicate_computed_gotos (void)
       /* BB must have one outgoing edge.  That edge must not lead to
          the exit block or the next block.
 	 The destination must have more than one predecessor.  */
-      if (EDGE_COUNT(bb->succs) != 1
-	  || EDGE_SUCC(bb,0)->dest == EXIT_BLOCK_PTR
-	  || EDGE_SUCC(bb,0)->dest == bb->next_bb
-	  || EDGE_COUNT(EDGE_SUCC(bb,0)->dest->preds) <= 1)
+      if (!single_succ_p (bb)
+	  || single_succ (bb) == EXIT_BLOCK_PTR
+	  || single_succ (bb) == bb->next_bb
+	  || single_pred_p (single_succ (bb)))
 	continue;
 
       /* The successor block has to be a duplication candidate.  */
-      if (!bitmap_bit_p (candidates, EDGE_SUCC(bb,0)->dest->index))
+      if (!bitmap_bit_p (candidates, single_succ (bb)->index))
 	continue;
 
-      new_bb = duplicate_block (EDGE_SUCC(bb,0)->dest, EDGE_SUCC(bb,0));
+      new_bb = duplicate_block (single_succ (bb), single_succ_edge (bb));
       new_bb->rbi->next = bb->rbi->next;
       bb->rbi->next = new_bb;
       new_bb->rbi->visited = 1;