use auto_bitmap more

gcc/ChangeLog:

2017-05-13  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* bt-load.c (combine_btr_defs): Use auto_bitmap to manage bitmap
	lifetime.
	(migrate_btr_def): Likewise.
	* cfgloop.c (get_loop_body_in_bfs_order): Likewise.
	* df-core.c (loop_post_order_compute): Likewise.
	(loop_inverted_post_order_compute): Likewise.
	* hsa-common.h: Likewise.
	* hsa-gen.c (hsa_bb::~hsa_bb): Likewise.
	* init-regs.c (initialize_uninitialized_regs): Likewise.
	* ipa-inline.c (resolve_noninline_speculation): Likewise.
	(inline_small_functions): Likewise.
	* ipa-reference.c (ipa_reference_write_optimization_summary): Likewise.
	* ira.c (combine_and_move_insns): Likewise.
	(build_insn_chain): Likewise.
	* loop-invariant.c (find_invariants): Likewise.
	* lower-subreg.c (propagate_pseudo_copies): Likewise.
	* predict.c (tree_predict_by_opcode): Likewise.
	(predict_paths_leading_to): Likewise.
	(predict_paths_leading_to_edge): Likewise.
	(estimate_loops_at_level): Likewise.
	(estimate_loops): Likewise.
	* shrink-wrap.c (try_shrink_wrapping): Likewise.
	(spread_components): Likewise.
	* tree-cfg.c (remove_edge_and_dominated_blocks): Likewise.
	* tree-loop-distribution.c (rdg_build_partitions): Likewise.
	* tree-predcom.c (tree_predictive_commoning_loop): Likewise.
	* tree-ssa-coalesce.c (coalesce_ssa_name): Likewise.
	* tree-ssa-phionlycprop.c (pass_phi_only_cprop::execute): Likewise.
	* tree-ssa-pre.c (remove_dead_inserted_code): Likewise.
	* tree-ssa-sink.c (nearest_common_dominator_of_uses): Likewise.
	* tree-ssa-threadupdate.c (compute_path_counts): Likewise.
	(mark_threaded_blocks): Likewise.
	(thread_through_all_blocks): Likewise.
	* tree-ssa.c (verify_ssa): Likewise.
	(execute_update_addresses_taken): Likewise.
	* tree-ssanames.c (verify_ssaname_freelists): Likewise.

From-SVN: r248021

1 files changed, 4 insertions, 9 deletions

diff --git a/gcc/ira.c b/gcc/ira.c
index bfb05080de1..c9751ce81ba 100644
--- a/gcc/ira.c
+++ b/gcc/ira.c
@@ -3698,7 +3698,7 @@ add_store_equivs (void)
 static void
 combine_and_move_insns (void)
 {
-  bitmap cleared_regs = BITMAP_ALLOC (NULL);
+  auto_bitmap cleared_regs;
   int max = max_reg_num ();
 
   for (int regno = FIRST_PSEUDO_REGISTER; regno < max; regno++)
@@ -3856,8 +3856,6 @@ combine_and_move_insns (void)
 		df_insn_rescan (insn);
 	    }
     }
-
-  BITMAP_FREE (cleared_regs);
 }
 
 /* A pass over indirect jumps, converting simple cases to direct jumps.
@@ -4083,8 +4081,8 @@ build_insn_chain (void)
   basic_block bb;
   struct insn_chain *c = NULL;
   struct insn_chain *next = NULL;
-  bitmap live_relevant_regs = BITMAP_ALLOC (NULL);
-  bitmap elim_regset = BITMAP_ALLOC (NULL);
+  auto_bitmap live_relevant_regs;
+  auto_bitmap elim_regset;
   /* live_subregs is a vector used to keep accurate information about
      which hardregs are live in multiword pseudos.  live_subregs and
      live_subregs_used are indexed by pseudo number.  The live_subreg
@@ -4093,7 +4091,7 @@ build_insn_chain (void)
      live_subreg[allocno] is number of bytes that the pseudo can
      occupy.  */
   sbitmap *live_subregs = XCNEWVEC (sbitmap, max_regno);
-  bitmap live_subregs_used = BITMAP_ALLOC (NULL);
+  auto_bitmap live_subregs_used;
 
   for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
     if (TEST_HARD_REG_BIT (eliminable_regset, i))
@@ -4336,9 +4334,6 @@ build_insn_chain (void)
     if (live_subregs[i] != NULL)
       sbitmap_free (live_subregs[i]);
   free (live_subregs);
-  BITMAP_FREE (live_subregs_used);
-  BITMAP_FREE (live_relevant_regs);
-  BITMAP_FREE (elim_regset);
 
   if (dump_file)
     print_insn_chains (dump_file);