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.

From-SVN: r238748

1 files changed, 2 insertions, 7 deletions

diff --git a/gcc/gcse.c b/gcc/gcse.c
index 49534f255f6..c2c0e8ec690 100644
--- a/gcc/gcse.c
+++ b/gcc/gcse.c
@@ -1691,12 +1691,11 @@ free_pre_mem (void)
 static void
 prune_expressions (bool pre_p)
 {
-  sbitmap prune_exprs;
   struct gcse_expr *expr;
   unsigned int ui;
   basic_block bb;
 
-  prune_exprs = sbitmap_alloc (expr_hash_table.n_elems);
+  auto_sbitmap prune_exprs (expr_hash_table.n_elems);
   bitmap_clear (prune_exprs);
   for (ui = 0; ui < expr_hash_table.size; ui++)
     {
@@ -1767,8 +1766,6 @@ prune_expressions (bool pre_p)
 	    break;
 	  }
     }
-
-  sbitmap_free (prune_exprs);
 }
 
 /* It may be necessary to insert a large number of insns on edges to
@@ -1783,7 +1780,6 @@ static void
 prune_insertions_deletions (int n_elems)
 {
   sbitmap_iterator sbi;
-  sbitmap prune_exprs;
 
   /* We always use I to iterate over blocks/edges and J to iterate over
      expressions.  */
@@ -1797,7 +1793,7 @@ prune_insertions_deletions (int n_elems)
   /* Set of expressions which require too many insertions relative to
      the number of deletions achieved.  We will prune these out of the
      insertion/deletion sets.  */
-  prune_exprs = sbitmap_alloc (n_elems);
+  auto_sbitmap prune_exprs (n_elems);
   bitmap_clear (prune_exprs);
 
   /* Iterate over the edges counting the number of times each expression
@@ -1835,7 +1831,6 @@ prune_insertions_deletions (int n_elems)
 	bitmap_clear_bit (pre_delete_map[i], j);
     }
 
-  sbitmap_free (prune_exprs);
   free (insertions);
   free (deletions);
 }