This patch is the main part of a consolodation of the hash_table patches to the...

This patch is the main part of a consolodation of the hash_table
patches to the cxx-conversion branch for files not under gcc/config.

Update various hash tables from htab_t to hash_table.
Modify types and calls to match.

* tree-parloops.c'reduction
* tree-parloops.c'name_to_copy

Fold reduction_info_hash and reduction_info_eq into new struct
reduction_hasher.  Fold name_to_copy_elt_eq and name_to_copy_elt_hash
into new struct name_to_copy_hasher.

* trans-mem.c'tm_log

Fold tm_log_hash, tm_log_eq, tm_log_free into new struct log_entry_hasher.

* trans-mem.c'tm_memopt_value_numbers

Fold tm_memop_hash, tm_memop_eq into new struct tm_memop_hasher.

* tree-ssa-strlen.c'decl_to_stridxlist_htab

Fold decl_to_stridxlist_hash into new struct stridxlist_hasher.

* tree-ssa-loop-ivopts.c'ivopts_data::inv_expr_tab

Fold htab_inv_expr_hash and htab_inv_expr_eq into new struct
iv_inv_expr_hasher.

* tree-ssa-uncprop.c'equiv

Equiv renamed to val_ssa_equiv because of name ambiguity with local variables.

Fold equiv_hash, equiv_eq and equiv_free into new struct val_ssa_equiv_hasher.

Renamed variables equiv_hash_elt to an_equiv_elt because of name ambiguity
with struct type.  Changed equiv_hash_elt_p to an_equiv_elt_p to match.

* tree-ssa-phiopt.c'seen_ssa_names

Fold name_to_bb_hash and name_to_bb_eq into new struct ssa_names_hasher.

* tree-ssa-structalias.c'pointer_equiv_class_table
* tree-ssa-structalias.c'location_equiv_class_table

Fold equiv_class_label_hash and equiv_class_label_eq into new
struct equiv_class_hasher.

* tree-ssa-structalias.c'shared_bitmap_table

Fold shared_bitmap_hash and shared_bitmap_eq into new struct
shared_bitmap_hasher.

* tree-ssa-live.c'var_map_base_init::tree_to_index

New struct tree_int_map_hasher.

* tree-sra.c'candidates

Fold uid_decl_map_hash and uid_decl_map_eq into new struct
uid_decl_hasher.  This change moves the definitions from tree-ssa.c
into tree-sra.c and removes the declarations from tree-flow.h

tree-browser.c

Remove stale declaration of removed TB_parent_eq.
Fix template parameter for base class to match value_type.

gimple.h

Use gimplify_hasher::hash rather than gimple_tree_hash in the
  assertion check.
Change return values to match return type. (I.e. no conversions.)

* graphite-clast-to-gimple.c'ivs_params::newivs_index
* graphite-clast-to-gimple.c'ivs_params::params_index
* graphite-clast-to-gimple.c'print_generated_program::params_index
* graphite-clast-to-gimple.c'gloog::newivs_index
* graphite-clast-to-gimple.c'gloog::params_index
* graphite.c graphite_transform_loops::bb_pbb_mapping
* sese.c copy_bb_and_scalar_dependences::rename_map

Move hash table declarations to a new graphite-htab.h, because they
are used in few places.

Remove unused:

htab_t scop::original_pddrs
SCOP_ORIGINAL_PDDRS

Remove unused:

insert_loop_close_phis
insert_guard_phis
debug_ivtype_map
ivtype_map_elt_info
new_ivtype_map_elt

* gimplify.c'gimplify_ctx::temp_htab

Move struct gimple_temp_hash_elt and struct gimplify_ctx to a new
gimplify-ctx.h, because they are used few places.

* cselib.c'cselib_hash_table
* gcse.c'pre_ldst_table
* gimple-ssa-strength-reduction.c'base_cand_map
* haifa-sched.c'delay_htab
* haifa-sched.c'delay_htab_i2
* ira-color.c'allocno_hard_regs_htab
* ira-costs.c'cost_classes_htab
* loop-invariant.c'merge_identical_invariants::eq
* loop-iv.c'bivs
* loop-unroll.c'opt_info::insns_to_split
* loop-unroll.c'opt_info::insns_with_var_to_expand
* passes.c'name_to_pass_map
* plugin.c'event_tab
* postreload-gcse.c'expr_table
* store-motion.c'store_motion_mems_table
* tree-cfg.c'discriminator_per_locus
* tree-scalar-evolution.c'resolve_mixers::cache
* tree-ssa-dom.c'avail_exprs

Remove unused:
dse.c bitmap clear_alias_sets
dse.c bitmap disqualified_clear_alias_sets
dse.c alloc_pool clear_alias_mode_pool
dse.c dse_step2_spill
dse.c dse_step5_spill
graphds.h htab_t graph::indices

* attribs.c'scoped_attributes::attribute_hash
* bitmap.c'bitmap_desc_hash
* dwarf2cfi.c'trace_index
* dwarf2out.c'break_out_includes::cu_hash_table
* dwarf2out.c'copy_decls_for_unworthy_types::decl_table
* dwarf2out.c'optimize_external_refs::map
* dwarf2out.c'output_comp_unit::extern_map
* dwarf2out.c'output_comdat_type_unit::extern_map
* dwarf2out.c'output_macinfo::macinfo_htab
* dwarf2out.c'optimize_location_lists::htab
* dwarf2out.c'dwarf2out_finish::comdat_type_table
* except.c'ehspec_hash_type
* except.c'assign_filter_values::ttypes
* except.c'assign_filter_values::ehspec
* except.c'sjlj_assign_call_site_values::ar_hash
* except.c'convert_to_eh_region_ranges::ar_hash
* trans-mem.c'tm_new_mem_hash
* tree-browser.c'TB_up_ht
* tree-eh.c'finally_tree

Move the declaration of hash_table <alloc_pool_hasher> alloc_pool_hash
in alloc-pool.c to after the method definitions for its parameter
class.

* ggc-common.c'loc_hash
* ggc-common.c'ptr_hash

Add a new hash_table method elements_with_deleted to meet the needs of
gcc-common.c.

Correct many methods with parameter types compare_type to the correct
value_type.  (Correct code was unlikely to notice the change, but
incorrect code will.)

* tree-complex.c'complex_variable_components
* tree-parloops.c'eliminate_local_variables_stmt::decl_address
* tree-parloops.c'separate_decls_in_region::decl_copies

Move hash table declarations to a new tree-hasher.h, to resolve
compilation dependences and because they are used in few places.

* lto-streamer.h'output_block::string_hash_table
* lto-streamer-in.c'file_name_hash_table
* lto-streamer.c'tree_htab

The struct string_slot moves from data-streamer.h to lto-streamer.h to
resolve compilation dependences.

Tested on x86_64.


Index: gcc/ChangeLog

2013-04-25  Lawrence Crowl  <crowl@google.com>

	* Makefile.in: Update as needed below.

	* alloc-pool.c (static hash_table <alloc_pool_hasher> alloc_pool_hash):
	Move declaration to after the type's method definitons.

	* attribs.c (htab_t scoped_attributes::attribute_hash):
	Change type to hash_table.  Update dependent calls and types.

	* bitmap.c (htab_t bitmap_desc_hash):
	Change type to hash_table.  Update dependent calls and types.

	* cselib.c (htab_t cselib_hash_table):
	Change type to hash_table.  Update dependent calls and types.

	* data-streamer.h (struct string_slot): Move to lto-streamer.h.
	(hash_string_slot_node): Move implementation into lto-streamer.h
	struct string_slot_hasher.
	(eq_string_slot_node): Likewise.

	* data-streamer-out.c: Update output_block::string_hash_table
	dependent calls and types.

	* dwarf2cfi.c (htab_t trace_index):
	Change type to hash_table.  Update dependent calls and types.

	* dwarf2out.c (htab_t break_out_includes::cu_hash_table):
	Change type to hash_table.  Update dependent calls and types.
	(htab_t copy_decls_for_unworthy_types::decl_table): Likewise.
	(htab_t optimize_external_refs::map): Likewise.
	(htab_t output_comp_unit::extern_map): Likewise.
	(htab_t output_comdat_type_unit::extern_map): Likewise.
	(htab_t output_macinfo::macinfo_htab): Likewise.
	(htab_t optimize_location_lists::htab): Likewise.
	(htab_t dwarf2out_finish::comdat_type_table): Likewise.

	* except.c (htab_t ehspec_hash_type):
	Change type to hash_table.  Update dependent calls and types.
	(assign_filter_values::ttypes): Likewise.
	(assign_filter_values::ehspec): Likewise.
	(sjlj_assign_call_site_values::ar_hash): Likewise.
	(convert_to_eh_region_ranges::ar_hash): Likewise.

	* gcse.c (htab_t pre_ldst_table):
	Change type to hash_table.  Update dependent calls and types.

	* ggc-common.c (htab_t saving_htab):
	Change type to hash_table.  Update dependent calls and types.
	(htab_t loc_hash): Likewise.
	(htab_t ptr_hash): Likewise.
	(call_count): Rename ggc_call_count.
	(call_alloc): Rename ggc_call_alloc.
	(loc_descriptor): Rename make_loc_descriptor.
	(add_statistics): Rename ggc_add_statistics.

	* ggc-common.c (saving_htab):
	Change type to hash_table.  Update dependent calls and types.

	* gimple.h (struct gimplify_ctx): Move to gimplify-ctx.h.
	(push_gimplify_context): Likewise.
	(pop_gimplify_context): Likewise.
	(struct gimple_temp_hash_elt): Added.
	(struct gimplify_hasher): Likewise.
	(struct gimplify_ctx.temp_htab):
	Change type to hash_table.  Update dependent calls and types.

	* gimple-fold.c: Include gimplify-ctx.h.

	* gimple-ssa-strength-reduction.c (htab_t base_cand_map):
	Change type to hash_table.  Update dependent calls and types.
	(base_cand_dump_callback): Rename to ssa_base_cand_dump_callback to
	avoid potential global name collision.

	* gimplify.c: Include gimplify-ctx.h.
	(struct gimple_temp_hash_elt): Move to gimplify-ctx.h.
	(htab_t gimplify_ctx::temp_htab):
	Update dependent calls and types for new type hash_table.
	(gimple_tree_hash): Move into gimplify_hasher in gimplify-ctx.h.
	(gimple_tree_eq): Move into gimplify_hasher in gimplify-ctx.h.

	* gimplify-ctx.h: New.
	(struct gimple_temp_hash_elt): Move from gimplify.c.
	(class gimplify_hasher): New.
	(struct gimplify_ctx): Move from gimple.h.
	(htab_t gimplify_ctx::temp_htab):
	Change type to hash_table.  Update dependent calls and types.

	* graphite-clast-to-gimple.c: Include graphite-htab.h.
	(htab_t ivs_params::newivs_index):
	Change type to hash_table.  Update dependent calls and types.
	(htab_t ivs_params::params_index): Likewise.
	(htab_t print_generated_program::params_index): Likewise.
	(htab_t gloog::newivs_index): Likewise.
	(htab_t gloog::params_index): Likewise.

	* graphite.c: Include graphite-htab.h.
	4htab_t graphite_transform_loops::bb_pbb_mapping):
	Change type to hash_table.  Update dependent calls and types.

	* graphite-clast-to-gimple.h: (extern gloog) Move to graphite-htab.h.
	(bb_pbb_map_hash): Fold into bb_pbb_htab_type in graphite-htab.h.
	(eq_bb_pbb_map): Fold into bb_pbb_htab_type in graphite-htab.h.

	* graphite-dependences.c: Include graphite-htab.h.
	(loop_is_parallel_p): Change hash table type of parameter.

	* graphite-htab.h: New.
	(typedef hash_table <bb_pbb_hasher> bb_pbb_htab_type): New.
	(extern find_pbb_via_hash): Move from graphite-poly.h.
	(extern loop_is_parallel_p): Move from graphite-poly.h.
	(extern get_loop_body_pbbs): Move from graphite-poly.h.

	* graphite-poly.h (extern find_pbb_via_hash): Move to graphite-htab.h.
	(extern loop_is_parallel_p): Move to graphite-htab.h.
	(extern get_loop_body_pbbs): Move to graphite-htab.h.

	* haifa-sched.c (htab_t delay_htab):
	Change type to hash_table.  Update dependent calls and types.
	(htab_t delay_htab_i2): Likewise.

	* ira-color.c (htab_t allocno_hard_regs_htab):
	Change type to hash_table.  Update dependent calls and types.

	* ira-costs.c (htab_t cost_classes_htab):
	Change type to hash_table.  Update dependent calls and types.

	* loop-invariant.c (htab_t merge_identical_invariants::eq):
	Change type to hash_table.  Update dependent calls and types.

	* loop-iv.c (htab_t bivs):
	Change type to hash_table.  Update dependent calls and types.

	* loop-unroll.c (htab_t opt_info::insns_to_split):
	Change type to hash_table.  Update dependent calls and types.
	(htab_t opt_info::insns_with_var_to_expand): Likewise.

	* lto-streamer.h (struct string_slot): Move from data-streamer.h
	(struct string_slot_hasher): New.
	(htab_t output_block::string_hash_table):
	Change type to hash_table.  Update dependent calls and types.

	* lto-streamer-in.c (freeing_string_slot_hasher): New.
	(htab_t file_name_hash_table):
	Change type to hash_table.  Update dependent calls and types.

	* lto-streamer-out.c: Update output_block::string_hash_table dependent
	calls and types.

	* lto-streamer.c (htab_t tree_htab):
	Change type to hash_table.  Update dependent calls and types.

	* omp-low.c: Include gimplify-ctx.h.

	* passes.c (htab_t name_to_pass_map):
	Change type to hash_table.  Update dependent calls and types.
	(pass_traverse): Rename to passes_pass_traverse.

	* plugin.c (htab_t event_tab):
	Change type to hash_table.  Update dependent calls and types.

	* postreload-gcse.c (htab_t expr_table):
	Change type to hash_table.  Update dependent calls and types.
	(dump_hash_table_entry): Rename dump_expr_hash_table_entry.

	* sese.c (debug_rename_map_1): Make extern.
	(htab_t copy_bb_and_scalar_dependences::rename_map):
	Change type to hash_table.  Update dependent calls and types.

	* sese.h (extern debug_rename_map): Move to .c file.

	* store-motion.c (htab_t store_motion_mems_table):
	Change type to hash_table.  Update dependent calls and types.

	* trans-mem.c (htab_t tm_new_mem_hash):
	Change type to hash_table.  Update dependent calls and types.

	* tree-browser.c (htab_t TB_up_ht):
	Change type to hash_table.  Update dependent calls and types.

	* tree-cfg.c (htab_t discriminator_per_locus):
	Change type to hash_table.  Update dependent calls and types.

	* tree-complex.c: Include tree-hasher.h
	(htab_t complex_variable_components):
	Change type to hash_table.  Update dependent calls and types.

	* tree-eh.c (htab_t finally_tree):
	Change type to hash_table.  Update dependent calls and types.

	* tree-flow.h (extern int_tree_map_hash): Moved into tree-hasher
	struct int_tree_hasher.
	(extern int_tree_map_eq): Likewise.
	(uid_decl_map_hash): Removed.
	(extern decl_tree_map_eq): Likewise.

	* tree-hasher.h: New.
	(struct int_tree_hasher): New.
	(typedef int_tree_htab_type): New.

	* tree-inline.c: Include gimplify-ctx.h.

	* tree-mudflap.c: Include gimplify-ctx.h.

	* tree-parloops.c: Include tree-hasher.h.
	(htab_t eliminate_local_variables_stmt::decl_address):
	Change type to hash_table.  Update dependent calls and types.
	(htab_t separate_decls_in_region::decl_copies): Likewise.

	* tree-scalar-evolution.c (htab_t resolve_mixers::cache):
	Change type to hash_table.  Update dependent calls and types.

	* tree-sra.c (candidates):
	Change type to hash_table.  Update dependent calls and types.

	* tree-ssa.c (int_tree_map_eq): Moved into struct int_tree_hasher
	in tree-flow.h.
	(int_tree_map_hash): Likewise.

	* tree-ssa-dom.c (htab_t avail_exprs):
	Change type to hash_table.  Update dependent calls and types.

	* tree-ssa-live.c (var_map_base_init::tree_to_index):
	Change type to hash_table.  Update dependent calls and types.

	* tree-ssa-loop-ivopts.c (struct ivopts_data.inv_expr_tab):
	Change type to hash_table.  Update dependent calls and types.

	* tree-ssa-phiopt.c (seen_ssa_names):
	Change type to hash_table.  Update dependent calls and types.

	* tree-ssa-strlen.c (decl_to_stridxlist_htab):
	Change type to hash_table.  Update dependent calls and types.

	* tree-ssa-uncprop.c (equiv):
	Change type to hash_table.  Update dependent calls and types.

From-SVN: r198329

1 files changed, 100 insertions, 81 deletions

diff --git a/gcc/except.c b/gcc/except.c
index 4e85f73..b25207b4 100644
--- a/gcc/except.c
+++ b/gcc/except.c
@@ -128,7 +128,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "dwarf2out.h"
 #include "dwarf2.h"
 #include "toplev.h"
-#include "hashtab.h"
+#include "hash-table.h"
 #include "intl.h"
 #include "ggc.h"
 #include "tm_p.h"
@@ -166,6 +166,49 @@ struct GTY(()) call_site_record_d
   rtx landing_pad;
   int action;
 };
+
+/* In the following structure and associated functions,
+   we represent entries in the action table as 1-based indices.
+   Special cases are:
+
+	 0:	null action record, non-null landing pad; implies cleanups
+	-1:	null action record, null landing pad; implies no action
+	-2:	no call-site entry; implies must_not_throw
+	-3:	we have yet to process outer regions
+
+   Further, no special cases apply to the "next" field of the record.
+   For next, 0 means end of list.  */
+
+struct action_record
+{
+  int offset;
+  int filter;
+  int next;
+};
+
+/* Hashtable helpers.  */
+
+struct action_record_hasher : typed_free_remove <action_record>
+{
+  typedef action_record value_type;
+  typedef action_record compare_type;
+  static inline hashval_t hash (const value_type *);
+  static inline bool equal (const value_type *, const compare_type *);
+};
+
+inline hashval_t
+action_record_hasher::hash (const value_type *entry)
+{
+  return entry->next * 1009 + entry->filter;
+}
+
+inline bool
+action_record_hasher::equal (const value_type *entry, const compare_type *data)
+{
+  return entry->filter == data->filter && entry->next == data->next;
+}
+
+typedef hash_table <action_record_hasher> action_hash_type;
 
 static bool get_eh_region_and_lp_from_rtx (const_rtx, eh_region *,
 					   eh_landing_pad *);
@@ -173,18 +216,9 @@ static bool get_eh_region_and_lp_from_rtx (const_rtx, eh_region *,
 static int t2r_eq (const void *, const void *);
 static hashval_t t2r_hash (const void *);
 
-static int ttypes_filter_eq (const void *, const void *);
-static hashval_t ttypes_filter_hash (const void *);
-static int ehspec_filter_eq (const void *, const void *);
-static hashval_t ehspec_filter_hash (const void *);
-static int add_ttypes_entry (htab_t, tree);
-static int add_ehspec_entry (htab_t, htab_t, tree);
 static void dw2_build_landing_pads (void);
 
-static int action_record_eq (const void *, const void *);
-static hashval_t action_record_hash (const void *);
-static int add_action_record (htab_t, int, int);
-static int collect_one_action_chain (htab_t, eh_region);
+static int collect_one_action_chain (action_hash_type, eh_region);
 static int add_call_site (rtx, int, int);
 
 static void push_uleb128 (vec<uchar, va_gc> **, unsigned int);
@@ -687,46 +721,60 @@ struct ttypes_filter {
   int filter;
 };
 
+/* Helper for ttypes_filter hashing.  */
+
+struct ttypes_filter_hasher : typed_free_remove <ttypes_filter>
+{
+  typedef ttypes_filter value_type;
+  typedef tree_node compare_type;
+  static inline hashval_t hash (const value_type *);
+  static inline bool equal (const value_type *, const compare_type *);
+};
+
 /* Compare ENTRY (a ttypes_filter entry in the hash table) with DATA
    (a tree) for a @TTypes type node we are thinking about adding.  */
 
-static int
-ttypes_filter_eq (const void *pentry, const void *pdata)
+inline bool
+ttypes_filter_hasher::equal (const value_type *entry, const compare_type *data)
 {
-  const struct ttypes_filter *const entry
-    = (const struct ttypes_filter *) pentry;
-  const_tree const data = (const_tree) pdata;
-
   return entry->t == data;
 }
 
-static hashval_t
-ttypes_filter_hash (const void *pentry)
+inline hashval_t
+ttypes_filter_hasher::hash (const value_type *entry)
 {
-  const struct ttypes_filter *entry = (const struct ttypes_filter *) pentry;
   return TREE_HASH (entry->t);
 }
 
+typedef hash_table <ttypes_filter_hasher> ttypes_hash_type;
+
+
+/* Helper for ehspec hashing.  */
+
+struct ehspec_hasher : typed_free_remove <ttypes_filter>
+{
+  typedef ttypes_filter value_type;
+  typedef ttypes_filter compare_type;
+  static inline hashval_t hash (const value_type *);
+  static inline bool equal (const value_type *, const compare_type *);
+};
+
 /* Compare ENTRY with DATA (both struct ttypes_filter) for a @TTypes
    exception specification list we are thinking about adding.  */
 /* ??? Currently we use the type lists in the order given.  Someone
    should put these in some canonical order.  */
 
-static int
-ehspec_filter_eq (const void *pentry, const void *pdata)
+inline bool
+ehspec_hasher::equal (const value_type *entry, const compare_type *data)
 {
-  const struct ttypes_filter *entry = (const struct ttypes_filter *) pentry;
-  const struct ttypes_filter *data = (const struct ttypes_filter *) pdata;
-
   return type_list_equal (entry->t, data->t);
 }
 
 /* Hash function for exception specification lists.  */
 
-static hashval_t
-ehspec_filter_hash (const void *pentry)
+inline hashval_t
+ehspec_hasher::hash (const value_type *entry)
 {
-  const struct ttypes_filter *entry = (const struct ttypes_filter *) pentry;
   hashval_t h = 0;
   tree list;
 
@@ -735,16 +783,19 @@ ehspec_filter_hash (const void *pentry)
   return h;
 }
 
+typedef hash_table <ehspec_hasher> ehspec_hash_type;
+
+
 /* Add TYPE (which may be NULL) to cfun->eh->ttype_data, using TYPES_HASH
    to speed up the search.  Return the filter value to be used.  */
 
 static int
-add_ttypes_entry (htab_t ttypes_hash, tree type)
+add_ttypes_entry (ttypes_hash_type ttypes_hash, tree type)
 {
   struct ttypes_filter **slot, *n;
 
-  slot = (struct ttypes_filter **)
-    htab_find_slot_with_hash (ttypes_hash, type, TREE_HASH (type), INSERT);
+  slot = ttypes_hash.find_slot_with_hash (type, (hashval_t) TREE_HASH (type),
+					  INSERT);
 
   if ((n = *slot) == NULL)
     {
@@ -765,14 +816,14 @@ add_ttypes_entry (htab_t ttypes_hash, tree type)
    to speed up the search.  Return the filter value to be used.  */
 
 static int
-add_ehspec_entry (htab_t ehspec_hash, htab_t ttypes_hash, tree list)
+add_ehspec_entry (ehspec_hash_type ehspec_hash, ttypes_hash_type ttypes_hash,
+		  tree list)
 {
   struct ttypes_filter **slot, *n;
   struct ttypes_filter dummy;
 
   dummy.t = list;
-  slot = (struct ttypes_filter **)
-    htab_find_slot (ehspec_hash, &dummy, INSERT);
+  slot = ehspec_hash.find_slot (&dummy, INSERT);
 
   if ((n = *slot) == NULL)
     {
@@ -821,7 +872,8 @@ void
 assign_filter_values (void)
 {
   int i;
-  htab_t ttypes, ehspec;
+  ttypes_hash_type ttypes;
+  ehspec_hash_type ehspec;
   eh_region r;
   eh_catch c;
 
@@ -831,8 +883,8 @@ assign_filter_values (void)
   else
     vec_alloc (cfun->eh->ehspec_data.other, 64);
 
-  ttypes = htab_create (31, ttypes_filter_hash, ttypes_filter_eq, free);
-  ehspec = htab_create (31, ehspec_filter_hash, ehspec_filter_eq, free);
+  ttypes.create (31);
+  ehspec.create (31);
 
   for (i = 1; vec_safe_iterate (cfun->eh->region_array, i, &r); ++i)
     {
@@ -886,8 +938,8 @@ assign_filter_values (void)
 	}
     }
 
-  htab_delete (ttypes);
-  htab_delete (ehspec);
+  ttypes.dispose ();
+  ehspec.dispose ();
 }
 
 /* Emit SEQ into basic block just before INSN (that is assumed to be
@@ -1009,12 +1061,12 @@ static vec<int> sjlj_lp_call_site_index;
 static int
 sjlj_assign_call_site_values (void)
 {
-  htab_t ar_hash;
+  action_hash_type ar_hash;
   int i, disp_index;
   eh_landing_pad lp;
 
   vec_alloc (crtl->eh.action_record_data, 64);
-  ar_hash = htab_create (31, action_record_hash, action_record_eq, free);
+  ar_hash.create (31);
 
   disp_index = 0;
   call_site_base = 1;
@@ -1043,7 +1095,7 @@ sjlj_assign_call_site_values (void)
 	disp_index++;
       }
 
-  htab_delete (ar_hash);
+  ar_hash.dispose ();
 
   return disp_index;
 }
@@ -2236,47 +2288,14 @@ expand_builtin_extend_pointer (tree addr_tree)
   return convert_modes (targetm.unwind_word_mode (), ptr_mode, addr, extend);
 }
 
-/* In the following functions, we represent entries in the action table
-   as 1-based indices.  Special cases are:
-
-	 0:	null action record, non-null landing pad; implies cleanups
-	-1:	null action record, null landing pad; implies no action
-	-2:	no call-site entry; implies must_not_throw
-	-3:	we have yet to process outer regions
-
-   Further, no special cases apply to the "next" field of the record.
-   For next, 0 means end of list.  */
-
-struct action_record
-{
-  int offset;
-  int filter;
-  int next;
-};
-
-static int
-action_record_eq (const void *pentry, const void *pdata)
-{
-  const struct action_record *entry = (const struct action_record *) pentry;
-  const struct action_record *data = (const struct action_record *) pdata;
-  return entry->filter == data->filter && entry->next == data->next;
-}
-
-static hashval_t
-action_record_hash (const void *pentry)
-{
-  const struct action_record *entry = (const struct action_record *) pentry;
-  return entry->next * 1009 + entry->filter;
-}
-
 static int
-add_action_record (htab_t ar_hash, int filter, int next)
+add_action_record (action_hash_type ar_hash, int filter, int next)
 {
   struct action_record **slot, *new_ar, tmp;
 
   tmp.filter = filter;
   tmp.next = next;
-  slot = (struct action_record **) htab_find_slot (ar_hash, &tmp, INSERT);
+  slot = ar_hash.find_slot (&tmp, INSERT);
 
   if ((new_ar = *slot) == NULL)
     {
@@ -2301,7 +2320,7 @@ add_action_record (htab_t ar_hash, int filter, int next)
 }
 
 static int
-collect_one_action_chain (htab_t ar_hash, eh_region region)
+collect_one_action_chain (action_hash_type ar_hash, eh_region region)
 {
   int next;
 
@@ -2430,7 +2449,7 @@ static unsigned int
 convert_to_eh_region_ranges (void)
 {
   rtx insn, iter, note;
-  htab_t ar_hash;
+  action_hash_type ar_hash;
   int last_action = -3;
   rtx last_action_insn = NULL_RTX;
   rtx last_landing_pad = NULL_RTX;
@@ -2444,7 +2463,7 @@ convert_to_eh_region_ranges (void)
 
   vec_alloc (crtl->eh.action_record_data, 64);
 
-  ar_hash = htab_create (31, action_record_hash, action_record_eq, free);
+  ar_hash.create (31);
 
   for (iter = get_insns (); iter ; iter = NEXT_INSN (iter))
     if (INSN_P (iter))
@@ -2581,7 +2600,7 @@ convert_to_eh_region_ranges (void)
 
   call_site_base = saved_call_site_base;
 
-  htab_delete (ar_hash);
+  ar_hash.dispose ();
   return 0;
 }