use auto_sbitmap in various places

gcc/ChangeLog:

2016-07-26  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* bt-load.c (compute_out): Use auto_sbitmap class.
	(link_btr_uses): Likewise.
	* cfganal.c (mark_dfs_back_edges): Likewise.
	(post_order_compute): Likewise.
	(inverted_post_order_compute): Likewise.
	(pre_and_rev_post_order_compute_fn): Likewise.
	(single_pred_before_succ_order): Likewise.
	* cfgexpand.c (pass_expand::execute): Likewise.
	* cfgloop.c (verify_loop_structure): Likewise.
	* cfgloopmanip.c (fix_bb_placements): Likewise.
	(remove_path): Likewise.
	(update_dominators_in_loop): Likewise.
	* cfgrtl.c (break_superblocks): Likewise.
	* ddg.c (check_sccs): Likewise.
	(create_ddg_all_sccs): Likewise.
	* df-core.c (df_worklist_dataflow): Likewise.
	* dse.c (dse_step3): Likewise.
	* except.c (eh_region_outermost): Likewise.
	* function.c (thread_prologue_and_epilogue_insns): Likewise.
	* gcse.c (prune_expressions): Likewise.
	(prune_insertions_deletions): Likewise.
	* gimple-ssa-backprop.c (backprop::~backprop): Likewise.
	* graph.c (draw_cfg_nodes_no_loops): Likewise.
	* ira-lives.c (remove_some_program_points_and_update_live_ranges): Likewise.
	* lcm.c (compute_earliest): Likewise.
	(compute_farthest): Likewise.
	* loop-unroll.c (unroll_loop_constant_iterations): Likewise.
	(unroll_loop_runtime_iterations): Likewise.
	(unroll_loop_stupid): Likewise.
	* lower-subreg.c (decompose_multiword_subregs): Likewise.
	* lra-lives.c: Likewise.
	* lra.c (lra): Likewise.
	* modulo-sched.c (schedule_reg_moves): Likewise.
	(optimize_sc): Likewise.
	(get_sched_window): Likewise.
	(sms_schedule_by_order): Likewise.
	(check_nodes_order): Likewise.
	(order_nodes_of_sccs): Likewise.
	(order_nodes_in_scc): Likewise.
	* recog.c (split_all_insns): Likewise.
	* regcprop.c (pass_cprop_hardreg::execute): Likewise.
	* reload1.c (reload): Likewise.
	* sched-rgn.c (haifa_find_rgns): Likewise.
	(split_edges): Likewise.
	(compute_trg_info): Likewise.
	* sel-sched.c (init_seqno): Likewise.
	* store-motion.c (remove_reachable_equiv_notes): Likewise.
	* tree-into-ssa.c (update_ssa): Likewise.
	* tree-ssa-live.c (live_worklist): Likewise.
	* tree-ssa-loop-im.c (fill_always_executed_in): Likewise.
	* tree-ssa-loop-ivcanon.c (try_unroll_loop_completely):
	* Likewise.
	(try_peel_loop): Likewise.
	* tree-ssa-loop-manip.c (tree_transform_and_unroll_loop):
	* Likewise.
	* tree-ssa-pre.c (compute_antic): Likewise.
	* tree-ssa-reassoc.c (undistribute_ops_list): Likewise.
	* tree-stdarg.c (reachable_at_most_once): Likewise.
	* tree-vect-slp.c (vect_attempt_slp_rearrange_stmts): Likewise.
	* var-tracking.c (vt_find_locations): Likewise.

git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@238748 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 3 insertions, 6 deletions

diff --git a/gcc/bt-load.c b/gcc/bt-load.c
index aa02f6436e4..5b1bcecd5c3 100644
--- a/gcc/bt-load.c
+++ b/gcc/bt-load.c
@@ -626,7 +626,7 @@ compute_out (sbitmap *bb_out, sbitmap *bb_gen, sbitmap *bb_kill, int max_uid)
      Iterate until the bb_out sets stop growing.  */
   int i;
   int changed;
-  sbitmap bb_in = sbitmap_alloc (max_uid);
+  auto_sbitmap bb_in (max_uid);
 
   for (i = NUM_FIXED_BLOCKS; i < last_basic_block_for_fn (cfun); i++)
     bitmap_copy (bb_out[i], bb_gen[i]);
@@ -642,7 +642,6 @@ compute_out (sbitmap *bb_out, sbitmap *bb_gen, sbitmap *bb_kill, int max_uid)
 					       bb_in, bb_kill[i]);
 	}
     }
-  sbitmap_free (bb_in);
 }
 
 static void
@@ -650,7 +649,7 @@ link_btr_uses (btr_def **def_array, btr_user **use_array, sbitmap *bb_out,
 	       sbitmap *btr_defset, int max_uid)
 {
   int i;
-  sbitmap reaching_defs = sbitmap_alloc (max_uid);
+  auto_sbitmap reaching_defs (max_uid);
 
   /* Link uses to the uses lists of all of their reaching defs.
      Count up the number of reaching defs of each use.  */
@@ -683,7 +682,7 @@ link_btr_uses (btr_def **def_array, btr_user **use_array, sbitmap *bb_out,
 	      if (user != NULL)
 		{
 		  /* Find all the reaching defs for this use.  */
-		  sbitmap reaching_defs_of_reg = sbitmap_alloc (max_uid);
+		  auto_sbitmap reaching_defs_of_reg (max_uid);
 		  unsigned int uid = 0;
 		  sbitmap_iterator sbi;
 
@@ -738,7 +737,6 @@ link_btr_uses (btr_def **def_array, btr_user **use_array, sbitmap *bb_out,
 		      user->next = def->uses;
 		      def->uses = user;
 		    }
-		  sbitmap_free (reaching_defs_of_reg);
 		}
 
 	      if (CALL_P (insn))
@@ -754,7 +752,6 @@ link_btr_uses (btr_def **def_array, btr_user **use_array, sbitmap *bb_out,
 	    }
 	}
     }
-  sbitmap_free (reaching_defs);
 }
 
 static void