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, 3 insertions, 10 deletions

diff --git a/gcc/cfgloopmanip.c b/gcc/cfgloopmanip.c
index 707a130..6bd2d85 100644
--- a/gcc/cfgloopmanip.c
+++ b/gcc/cfgloopmanip.c
@@ -181,7 +181,6 @@ fix_bb_placements (basic_block from,
 		   bool *irred_invalidated,
 		   bitmap loop_closed_ssa_invalidated)
 {
-  sbitmap in_queue;
   basic_block *queue, *qtop, *qbeg, *qend;
   struct loop *base_loop, *target_loop;
   edge e;
@@ -201,7 +200,7 @@ fix_bb_placements (basic_block from,
       || from == base_loop->header)
     return;
 
-  in_queue = sbitmap_alloc (last_basic_block_for_fn (cfun));
+  auto_sbitmap in_queue (last_basic_block_for_fn (cfun));
   bitmap_clear (in_queue);
   bitmap_set_bit (in_queue, from->index);
   /* Prevent us from going out of the base_loop.  */
@@ -292,7 +291,6 @@ fix_bb_placements (basic_block from,
 	  bitmap_set_bit (in_queue, pred->index);
 	}
     }
-  free (in_queue);
   free (queue);
 }
 
@@ -306,7 +304,6 @@ remove_path (edge e)
   basic_block *rem_bbs, *bord_bbs, from, bb;
   vec<basic_block> dom_bbs;
   int i, nrem, n_bord_bbs;
-  sbitmap seen;
   bool irred_invalidated = false;
   edge_iterator ei;
   struct loop *l, *f;
@@ -345,7 +342,7 @@ remove_path (edge e)
 
   n_bord_bbs = 0;
   bord_bbs = XNEWVEC (basic_block, n_basic_blocks_for_fn (cfun));
-  seen = sbitmap_alloc (last_basic_block_for_fn (cfun));
+  auto_sbitmap seen (last_basic_block_for_fn (cfun));
   bitmap_clear (seen);
 
   /* Find "border" hexes -- i.e. those with predecessor in removed path.  */
@@ -407,8 +404,6 @@ remove_path (edge e)
 	  dom_bbs.safe_push (ldom);
     }
 
-  free (seen);
-
   /* Recount dominators.  */
   iterate_fix_dominators (CDI_DOMINATORS, dom_bbs, true);
   dom_bbs.release ();
@@ -616,11 +611,10 @@ static void
 update_dominators_in_loop (struct loop *loop)
 {
   vec<basic_block> dom_bbs = vNULL;
-  sbitmap seen;
   basic_block *body;
   unsigned i;
 
-  seen = sbitmap_alloc (last_basic_block_for_fn (cfun));
+  auto_sbitmap seen (last_basic_block_for_fn (cfun));
   bitmap_clear (seen);
   body = get_loop_body (loop);
 
@@ -643,7 +637,6 @@ update_dominators_in_loop (struct loop *loop)
 
   iterate_fix_dominators (CDI_DOMINATORS, dom_bbs, false);
   free (body);
-  free (seen);
   dom_bbs.release ();
 }