Convert gimple types from a union to C++ inheritance

Patch partially autogenerated by refactor_gimple.py from
https://github.com/davidmalcolm/gcc-refactoring-scripts
revision 05fc808c61bd8ddd2372f29b79ceb2491360d298

	* Makefile.in (GIMPLE_H): Add dep on is-a.h.
	* coretypes.h (union gimple_statement_d): Remove declaration.
	(gimple): Convert from being a "union gimple_statement_d *"
	to a "struct gimple_statement_base *".
	(const_gimple): Likewise (with "const").
	* ggc.h (ggc_alloc_cleared_gimple_statement_d_stat): Replace
	with...
	(ggc_alloc_cleared_gimple_statement_stat): ...this.
	* gimple-pretty-print.c (debug): Change parameter from a
	"gimple_statement_d &" to a "gimple_statement_base &".
	(debug): Change parameter from a "gimple_statement_d *" to
	a "gimple_statement_base *".
	* gimple-pretty-print.h (debug): Update declarations as above.
	* gimple.c (gimple_alloc_stat): Update for renaming of
	ggc_alloc_cleared_gimple_statement_d_stat to
	ggc_alloc_cleared_gimple_statement_stat.
	* gimple.h: Include "is-a.h" for use by is_a_helper
	specializations in followup autogenerated patch.
	(struct gimple statement_base): Make this type usable as a base
	class by adding "desc", "tag" and "variable_size" to GTY, thus
	using opting-in to gengtype's support for simple inheritance.
	(gimple_statement_with_ops_base): Convert to a subclass of
	gimple_statement_base, dropping initial "gsbase" field.  Note
	that this type is abstract, with no GSS_ value, and thus no GTY
	tag value.
	(gimple_statement_with_ops): Convert to a subclass of
	gimple_statement_with_ops_base, dropping initial "opbase" field.
	Add tag value to GTY marking.  Update marking of op field to
	reflect how num_ops field is accessed via inheritance.
	(gimple_statement_with_memory_ops_base): Convert to a subclass of
	gimple_statement_with_ops_base, dropping initial "opbase" field.
	Add tag value to GTY marking.
	(gimple_statement_with_memory_ops): Convert to a subclass of
	public gimple_statement_with_memory_ops_base, dropping initial
	"membase" field.  Add tag value to GTY marking.  Update marking
	of op field to reflect how num_ops field is accessed via
	inheritance.
	(gimple_statement_call): Analogous changes that also update the
	marking of the "u" union.
	(gimple_statement_omp): Convert to a subclass of
	gimple_statement_base, dropping initial "gsbase" field, adding
	tag value to GTY marking.
	(gimple_statement_bind): Likewise.
	(gimple_statement_catch): Likewise.
	(gimple_statement_eh_filter): Likewise.
	(gimple_statement_eh_else): Likewise.
	(gimple_statement_eh_mnt): Likewise.
	(gimple_statement_phi): Likewise.
	(gimple_statement_eh_ctrl): Likewise.
	(gimple_statement_try): Likewise.
	(gimple_statement_wce): Likewise.
	(gimple_statement_asm): Convert to a subclass of
	gimple_statement_with_memory_ops_base, dropping initial
	"membase" field, adding tag value to GTY marking, and updating
	marking of op field.
	(gimple_statement_omp_critical): Convert to a subclass of
	gimple_statement_omp, dropping initial "omp" field, adding tag
	value to GTY marking.
	(gimple_statement_omp_for): Likewise.
	(gimple_statement_omp_parallel): Likewise.
	(gimple_statement_omp_task): Convert to a subclass of
	gimple_statement_omp_parallel, dropping initial "par" field,
	adding tag value to GTY marking.
	(gimple_statement_omp_sections): Convert to a subclass of
	gimple_statement_omp, dropping initial "omp" field, adding
	tag value to GTY marking.
	(gimple_statement_omp_continue): Convert to a subclass of
	gimple_statement_base, dropping initial "gsbase" field, adding
	tag value to GTY marking.
	(gimple_statement_omp_single): Convert to a subclass of
	gimple_statement_omp, dropping initial "omp" field, adding
	tag value to GTY marking.
	(gimple_statement_omp_atomic_load): Convert to a subclass of
	gimple_statement_base, dropping initial "gsbase" field, adding
	tag value to GTY marking.
	(gimple_statement_omp_atomic_store): Convert to a subclass of
	gimple_statement_base, dropping initial "gsbase" field, adding
	tag value to GTY marking.
	(gimple_statement_transaction): Convert to a subclass of
	gimple_statement_with_memory_ops_base, dropping initial "gsbase"
	field, adding tag value to GTY marking.
	(union gimple_statement_d): Remove.
	* system.h (CONST_CAST_GIMPLE): Update to use
	"struct gimple_statement_base *" rather than
	"union gimple_statement_d *".
	* tree-ssa-ccp.c (gimple_htab): Convert underlying type from
	gimple_statement_d to gimple_statement_base.

	* gimple.h (gimple_use_ops): Port from union to usage of
	dyn_cast.
	(gimple_set_use_ops): Port from union to usage of as_a.
	(gimple_set_vuse): Likewise.
	(gimple_set_vdef): Likewise.
	(gimple_call_internal_fn): Port from union to a static_cast,
	given that the type has already been asserted.
	(gimple_omp_body_ptr): Port from unchecked union usage to
	a static_cast.
	(gimple_omp_set_body): Likewise.

	* gimple-iterator.c (update_bb_for_stmts): Update for conversion of
	gimple types to a true class hierarchy.
	(update_call_edge_frequencies): Likewise.
	(gsi_insert_seq_nodes_before): Likewise.
	(gsi_insert_seq_nodes_after): Likewise.
	(gsi_split_seq_after): Likewise.
	(gsi_set_stmt): Likewise.
	(gsi_split_seq_before): Likewise.
	(gsi_remove): Likewise.
	* gimple-iterator.h (gsi_one_before_end_p): Likewise.
	(gsi_next): Likewise.
	(gsi_prev): Likewise.
	* gimple-pretty-print.c (dump_gimple_debug): Likewise.
	* gimple-ssa.h (gimple_vuse_op): Likewise.
	(gimple_vdef_op): Likewise.
	* gimple-streamer-in.c (input_gimple_stmt): Likewise.
	* gimple-streamer-out.c (output_gimple_stmt): Likewise.
	* gimple.c (gimple_set_code): Likewise.
	(gimple_alloc_stat): Likewise.
	(gimple_set_subcode): Likewise.
	(gimple_build_call_internal_1): Likewise.
	(gimple_check_failed): Likewise.
	(gimple_call_flags): Likewise.
	(gimple_set_bb): Likewise.
	* gimple.h (is_a_helper <gimple_statement_asm> (gimple)): New.
	(is_a_helper <gimple_statement_bind> (gimple)): Likewise.
	(is_a_helper <gimple_statement_call> (gimple)): Likewise.
	(is_a_helper <gimple_statement_catch> (gimple)): Likewise.
	(is_a_helper <gimple_statement_eh_ctrl> (gimple)): Likewise.
	(is_a_helper <gimple_statement_eh_else> (gimple)): Likewise.
	(is_a_helper <gimple_statement_eh_filter> (gimple)): Likewise.
	(is_a_helper <gimple_statement_eh_mnt> (gimple)): Likewise.
	(is_a_helper <gimple_statement_omp_atomic_load> (gimple)): Likewise.
	(is_a_helper <gimple_statement_omp_atomic_store> (gimple)): Likewise.
	(is_a_helper <gimple_statement_omp_continue> (gimple)): Likewise.
	(is_a_helper <gimple_statement_omp_critical> (gimple)): Likewise.
	(is_a_helper <gimple_statement_omp_for> (gimple)): Likewise.
	(is_a_helper <gimple_statement_omp_parallel> (gimple)): Likewise.
	(is_a_helper <gimple_statement_omp_sections> (gimple)): Likewise.
	(is_a_helper <gimple_statement_omp_single> (gimple)): Likewise.
	(is_a_helper <gimple_statement_omp_task> (gimple)): Likewise.
	(is_a_helper <gimple_statement_phi> (gimple)): Likewise.
	(is_a_helper <gimple_statement_transaction> (gimple)): Likewise.
	(is_a_helper <gimple_statement_try> (gimple)): Likewise.
	(is_a_helper <gimple_statement_wce> (gimple)): Likewise.
	(is_a_helper <const gimple_statement_asm> (const_gimple)): Likewise.
	(is_a_helper <const gimple_statement_bind> (const_gimple)): Likewise.
	(is_a_helper <const gimple_statement_call> (const_gimple)): Likewise.
	(is_a_helper <const gimple_statement_catch> (const_gimple)): Likewise.
	(is_a_helper <const gimple_statement_eh_ctrl> (const_gimple)):
	Likewise.
	(is_a_helper <const gimple_statement_eh_filter> (const_gimple)):
	Likewise.
	(is_a_helper <const gimple_statement_omp_atomic_load> (const_gimple)):
	Likewise.
	(is_a_helper <const gimple_statement_omp_atomic_store>
	(const_gimple)): Likewise.
	(is_a_helper <const gimple_statement_omp_continue> (const_gimple)):
	Likewise.
	(is_a_helper <const gimple_statement_omp_critical> (const_gimple)):
	Likewise.
	(is_a_helper <const gimple_statement_omp_for> (const_gimple)):
	Likewise.
	(is_a_helper <const gimple_statement_omp_parallel> (const_gimple)):
	Likewise.
	(is_a_helper <const gimple_statement_omp_sections> (const_gimple)):
	Likewise.
	(is_a_helper <const gimple_statement_omp_single> (const_gimple)):
	Likewise.
	(is_a_helper <const gimple_statement_omp_task> (const_gimple)):
	Likewise.
	(is_a_helper <const gimple_statement_phi> (const_gimple)): Likewise.
	(is_a_helper <const gimple_statement_transaction> (const_gimple)):
	Likewise.
	(gimple_seq_last): Update for conversion of gimple types to a true
	class hierarchy.
	(gimple_seq_set_last): Likewise.
	(gimple_code): Likewise.
	(gimple_bb): Likewise.
	(gimple_block): Likewise.
	(gimple_set_block): Likewise.
	(gimple_location): Likewise.
	(gimple_location_ptr): Likewise.
	(gimple_set_location): Likewise.
	(gimple_no_warning_p): Likewise.
	(gimple_set_no_warning): Likewise.
	(gimple_set_visited): Likewise.
	(gimple_visited_p): Likewise.
	(gimple_set_plf): Likewise.
	(gimple_plf): Likewise.
	(gimple_set_uid): Likewise.
	(gimple_uid): Likewise.
	(gimple_init_singleton): Likewise.
	(gimple_modified_p): Likewise.
	(gimple_set_modified): Likewise.
	(gimple_expr_code): Likewise.
	(gimple_has_volatile_ops): Likewise.
	(gimple_set_has_volatile_ops): Likewise.
	(gimple_omp_subcode): Likewise.
	(gimple_omp_set_subcode): Likewise.
	(gimple_omp_return_set_nowait): Likewise.
	(gimple_omp_section_set_last): Likewise.
	(gimple_omp_parallel_set_combined_p): Likewise.
	(gimple_omp_atomic_set_need_value): Likewise.
	(gimple_omp_atomic_set_seq_cst): Likewise.
	(gimple_num_ops): Likewise.
	(gimple_set_num_ops): Likewise.
	(gimple_assign_nontemporal_move_p): Likewise.
	(gimple_assign_set_nontemporal_move): Likewise.
	(gimple_assign_rhs_code): Likewise.
	(gimple_assign_set_rhs_code): Likewise.
	(gimple_call_internal_p): Likewise.
	(gimple_call_with_bounds_p): Likewise.
	(gimple_call_set_with_bounds): Likewise.
	(gimple_call_set_tail): Likewise.
	(gimple_call_tail_p): Likewise.
	(gimple_call_set_return_slot_opt): Likewise.
	(gimple_call_return_slot_opt_p): Likewise.
	(gimple_call_set_from_thunk): Likewise.
	(gimple_call_from_thunk_p): Likewise.
	(gimple_call_set_va_arg_pack): Likewise.
	(gimple_call_va_arg_pack_p): Likewise.
	(gimple_call_set_nothrow): Likewise.
	(gimple_call_set_alloca_for_var): Likewise.
	(gimple_call_alloca_for_var_p): Likewise.
	(gimple_call_copy_flags): Likewise.
	(gimple_cond_code): Likewise.
	(gimple_cond_set_code): Likewise.
	(gimple_cond_make_false): Likewise.
	(gimple_cond_make_true): Likewise.
	(gimple_asm_volatile_p): Likewise.
	(gimple_asm_set_volatile): Likewise.
	(gimple_asm_set_input): Likewise.
	(gimple_asm_input_p): Likewise.
	(gimple_try_kind): Likewise.
	(gimple_try_set_kind): Likewise.
	(gimple_try_catch_is_cleanup): Likewise.
	(gimple_try_set_catch_is_cleanup): Likewise.
	(gimple_wce_cleanup_eh_only): Likewise.
	(gimple_wce_set_cleanup_eh_only): Likewise.
	(gimple_debug_bind_p): Likewise.
	(gimple_debug_source_bind_p): Likewise.
	(gimple_omp_for_set_kind): Likewise.
	(gimple_omp_for_set_combined_p): Likewise.
	(gimple_omp_for_set_combined_into_p): Likewise.
	(gimple_omp_target_set_kind): Likewise.
	(gimple_transaction_subcode): Likewise.
	(gimple_transaction_set_subcode): Likewise.
	(gimple_predict_predictor): Likewise.
	(gimple_predict_set_predictor): Likewise.
	(gimple_predict_outcome): Likewise.
	(gimple_predict_set_outcome): Likewise.
	(gimple_transaction_set_label): Likewise.
	(gimple_transaction_set_body): Likewise.
	(gimple_transaction_label_ptr): Likewise.
	(gimple_transaction_label): Likewise.
	(gimple_transaction_body_ptr): Likewise.
	(gimple_omp_continue_set_control_use): Likewise.
	(gimple_omp_continue_control_use_ptr): Likewise.
	(gimple_omp_continue_control_use): Likewise.
	(gimple_omp_continue_set_control_def): Likewise.
	(gimple_omp_continue_control_def_ptr): Likewise.
	(gimple_omp_continue_control_def): Likewise.
	(gimple_omp_atomic_load_rhs_ptr): Likewise.
	(gimple_omp_atomic_load_rhs): Likewise.
	(gimple_omp_atomic_load_set_rhs): Likewise.
	(gimple_omp_atomic_load_lhs_ptr): Likewise.
	(gimple_omp_atomic_load_lhs): Likewise.
	(gimple_omp_atomic_load_set_lhs): Likewise.
	(gimple_omp_atomic_store_val_ptr): Likewise.
	(gimple_omp_atomic_store_val): Likewise.
	(gimple_omp_atomic_store_set_val): Likewise.
	(gimple_omp_for_cond): Likewise.
	(gimple_omp_for_set_cond): Likewise.
	(gimple_omp_sections_set_control): Likewise.
	(gimple_omp_sections_control_ptr): Likewise.
	(gimple_omp_sections_control): Likewise.
	(gimple_omp_sections_set_clauses): Likewise.
	(gimple_omp_sections_clauses_ptr): Likewise.
	(gimple_omp_sections_clauses): Likewise.
	(gimple_omp_teams_set_clauses): Likewise.
	(gimple_omp_teams_clauses_ptr): Likewise.
	(gimple_omp_teams_clauses): Likewise.
	(gimple_omp_target_set_data_arg): Likewise.
	(gimple_omp_target_data_arg_ptr): Likewise.
	(gimple_omp_target_data_arg): Likewise.
	(gimple_omp_target_set_child_fn): Likewise.
	(gimple_omp_target_child_fn_ptr): Likewise.
	(gimple_omp_target_child_fn): Likewise.
	(gimple_omp_target_set_clauses): Likewise.
	(gimple_omp_target_clauses_ptr): Likewise.
	(gimple_omp_target_clauses): Likewise.
	(gimple_omp_single_set_clauses): Likewise.
	(gimple_omp_single_clauses_ptr): Likewise.
	(gimple_omp_single_clauses): Likewise.
	(gimple_omp_task_set_arg_align): Likewise.
	(gimple_omp_task_arg_align_ptr): Likewise.
	(gimple_omp_task_arg_align): Likewise.
	(gimple_omp_task_set_arg_size): Likewise.
	(gimple_omp_task_arg_size_ptr): Likewise.
	(gimple_omp_task_arg_size): Likewise.
	(gimple_omp_task_set_copy_fn): Likewise.
	(gimple_omp_task_copy_fn_ptr): Likewise.
	(gimple_omp_task_copy_fn): Likewise.
	(gimple_omp_task_set_data_arg): Likewise.
	(gimple_omp_task_data_arg_ptr): Likewise.
	(gimple_omp_task_data_arg): Likewise.
	(gimple_omp_task_set_child_fn): Likewise.
	(gimple_omp_task_child_fn_ptr): Likewise.
	(gimple_omp_task_child_fn): Likewise.
	(gimple_omp_task_set_clauses): Likewise.
	(gimple_omp_task_clauses_ptr): Likewise.
	(gimple_omp_task_clauses): Likewise.
	(gimple_omp_parallel_set_data_arg): Likewise.
	(gimple_omp_parallel_data_arg_ptr): Likewise.
	(gimple_omp_parallel_data_arg): Likewise.
	(gimple_omp_parallel_set_child_fn): Likewise.
	(gimple_omp_parallel_child_fn_ptr): Likewise.
	(gimple_omp_parallel_child_fn): Likewise.
	(gimple_omp_parallel_set_clauses): Likewise.
	(gimple_omp_parallel_clauses_ptr): Likewise.
	(gimple_omp_parallel_clauses): Likewise.
	(gimple_omp_for_set_pre_body): Likewise.
	(gimple_omp_for_pre_body_ptr): Likewise.
	(gimple_omp_for_set_incr): Likewise.
	(gimple_omp_for_incr_ptr): Likewise.
	(gimple_omp_for_incr): Likewise.
	(gimple_omp_for_set_final): Likewise.
	(gimple_omp_for_final_ptr): Likewise.
	(gimple_omp_for_final): Likewise.
	(gimple_omp_for_set_initial): Likewise.
	(gimple_omp_for_initial_ptr): Likewise.
	(gimple_omp_for_initial): Likewise.
	(gimple_omp_for_set_index): Likewise.
	(gimple_omp_for_index_ptr): Likewise.
	(gimple_omp_for_index): Likewise.
	(gimple_omp_for_collapse): Likewise.
	(gimple_omp_for_set_clauses): Likewise.
	(gimple_omp_for_clauses_ptr): Likewise.
	(gimple_omp_for_clauses): Likewise.
	(gimple_omp_critical_set_name): Likewise.
	(gimple_omp_critical_name_ptr): Likewise.
	(gimple_omp_critical_name): Likewise.
	(gimple_eh_dispatch_set_region): Likewise.
	(gimple_eh_dispatch_region): Likewise.
	(gimple_resx_set_region): Likewise.
	(gimple_resx_region): Likewise.
	(gimple_phi_set_arg): Likewise.
	(gimple_phi_arg): Likewise.
	(gimple_phi_set_result): Likewise.
	(gimple_phi_result_ptr): Likewise.
	(gimple_phi_result): Likewise.
	(gimple_phi_num_args): Likewise.
	(gimple_phi_capacity): Likewise.
	(gimple_wce_set_cleanup): Likewise.
	(gimple_wce_cleanup_ptr): Likewise.
	(gimple_try_set_cleanup): Likewise.
	(gimple_try_set_eval): Likewise.
	(gimple_try_cleanup_ptr): Likewise.
	(gimple_try_eval_ptr): Likewise.
	(gimple_eh_else_set_e_body): Likewise.
	(gimple_eh_else_set_n_body): Likewise.
	(gimple_eh_else_e_body_ptr): Likewise.
	(gimple_eh_else_n_body_ptr): Likewise.
	(gimple_eh_must_not_throw_set_fndecl): Likewise.
	(gimple_eh_must_not_throw_fndecl): Likewise.
	(gimple_eh_filter_set_failure): Likewise.
	(gimple_eh_filter_set_types): Likewise.
	(gimple_eh_filter_failure_ptr): Likewise.
	(gimple_eh_filter_types_ptr): Likewise.
	(gimple_eh_filter_types): Likewise.
	(gimple_catch_set_handler): Likewise.
	(gimple_catch_set_types): Likewise.
	(gimple_catch_handler_ptr): Likewise.
	(gimple_catch_types_ptr): Likewise.
	(gimple_catch_types): Likewise.
	(gimple_asm_string): Likewise.
	(gimple_asm_set_label_op): Likewise.
	(gimple_asm_label_op): Likewise.
	(gimple_asm_set_clobber_op): Likewise.
	(gimple_asm_clobber_op): Likewise.
	(gimple_asm_set_output_op): Likewise.
	(gimple_asm_output_op_ptr): Likewise.
	(gimple_asm_output_op): Likewise.
	(gimple_asm_set_input_op): Likewise.
	(gimple_asm_input_op_ptr): Likewise.
	(gimple_asm_input_op): Likewise.
	(gimple_asm_nlabels): Likewise.
	(gimple_asm_nclobbers): Likewise.
	(gimple_asm_noutputs): Likewise.
	(gimple_asm_ninputs): Likewise.
	(gimple_bind_set_block): Likewise.
	(gimple_bind_block): Likewise.
	(gimple_bind_add_seq): Likewise.
	(gimple_bind_add_stmt): Likewise.
	(gimple_bind_set_body): Likewise.
	(gimple_bind_body_ptr): Likewise.
	(gimple_bind_append_vars): Likewise.
	(gimple_bind_set_vars): Likewise.
	(gimple_bind_vars): Likewise.
	(gimple_call_clobber_set): Likewise.
	(gimple_call_use_set): Likewise.
	(gimple_call_set_internal_fn): Likewise.
	(gimple_call_set_fntype): Likewise.
	(gimple_call_fntype): Likewise.
	(gimple_omp_return_lhs_ptr): Likewise.
	(gimple_omp_return_lhs): Likewise.
	(gimple_omp_return_set_lhs): Likewise.
	(gimple_omp_taskreg_set_data_arg): Likewise.
	(gimple_omp_taskreg_data_arg_ptr): Likewise.
	(gimple_omp_taskreg_data_arg): Likewise.
	(gimple_omp_taskreg_set_child_fn): Likewise.
	(gimple_omp_taskreg_child_fn_ptr): Likewise.
	(gimple_omp_taskreg_child_fn): Likewise.
	(gimple_omp_taskreg_set_clauses): Likewise.
	(gimple_omp_taskreg_clauses_ptr): Likewise.
	(gimple_omp_taskreg_clauses): Likewise.
	(gimple_vuse): Likewise.
	(gimple_vdef): Likewise.
	(gimple_vuse_ptr): Likewise.
	(gimple_vdef_ptr): Likewise.
	* tree-inline.c (copy_debug_stmt): Likewise.
	* tree-phinodes.c (make_phi_node): Likewise.

	* gimple.h (is_a_helper <const gimple_statement_with_ops>::test): New.
	(is_a_helper <gimple_statement_with_ops>::test): New.
	(is_a_helper <const gimple_statement_with_memory_ops>::test): New.
	(is_a_helper <gimple_statement_with_memory_ops>::test): New.

	* gimple-streamer-in.c (input_gimple_stmt): Port from union
	access to use of as_a.
	* gimple.c (gimple_build_asm_1): Likewise.
	(gimple_build_try): Likewise.  Also, return a specific subclass
	rather than just gimple.
	(gimple_build_resx): Port from union access to use of as_a.
	(gimple_build_eh_dispatch): Likewise.
	(gimple_build_omp_for): Likewise.  Also, convert allocation of iter
	now that gengtype no longer provides a typed allocator function.
	(gimple_copy): Likewise.
	* gimple.h (gimple_build_try): Return a specific subclass rather
	than just gimple.
	* gimplify.c (gimplify_cleanup_point_expr): Replace union access
	with subclass access by making use of new return type of
	gimple_build_try.
	* tree-phinodes.c: (allocate_phi_node): Return a
	"gimple_statement_phi *" rather than just a gimple.
	(resize_phi_node): Likewise.
	(make_phi_node): Replace union access with subclass access by
	making use of new return type of allocate_phi_node.
	(reserve_phi_args_for_new_edge): Replace union access with as_a.
	(remove_phi_arg_num): Accept a "gimple_statement_phi *" rather
	than just a gimple.
	(remove_phi_args): Update for change to remove_phi_arg_num.

	* gdbhooks.py (GimplePrinter.to_string): Update lookup of
	code field to reflect inheritance, rather than embedding of
	the base gimple type.

From-SVN: r205034

1 files changed, 36 insertions, 36 deletions

diff --git a/gcc/gimple-iterator.c b/gcc/gimple-iterator.c
index b9453892891..557bf35f015 100644
--- a/gcc/gimple-iterator.c
+++ b/gcc/gimple-iterator.c
@@ -68,7 +68,7 @@ update_bb_for_stmts (gimple_seq_node first, gimple_seq_node last,
 {
   gimple_seq_node n;
 
-  for (n = first; n; n = n->gsbase.next)
+  for (n = first; n; n = n->next)
     {
       gimple_set_bb (n, bb);
       if (n == last)
@@ -86,7 +86,7 @@ update_call_edge_frequencies (gimple_seq_node first, basic_block bb)
   int bb_freq = 0;
   gimple_seq_node n;
 
-  for (n = first; n ; n = n->gsbase.next)
+  for (n = first; n ; n = n->next)
     if (is_gimple_call (n))
       {
 	struct cgraph_edge *e;
@@ -124,7 +124,7 @@ gsi_insert_seq_nodes_before (gimple_stmt_iterator *i,
   basic_block bb;
   gimple_seq_node cur = i->ptr;
 
-  gcc_assert (!cur || cur->gsbase.prev);
+  gcc_assert (!cur || cur->prev);
 
   if ((bb = gsi_bb (*i)) != NULL)
     update_bb_for_stmts (first, last, bb);
@@ -132,13 +132,13 @@ gsi_insert_seq_nodes_before (gimple_stmt_iterator *i,
   /* Link SEQ before CUR in the sequence.  */
   if (cur)
     {
-      first->gsbase.prev = cur->gsbase.prev;
-      if (first->gsbase.prev->gsbase.next)
-	first->gsbase.prev->gsbase.next = first;
+      first->prev = cur->prev;
+      if (first->prev->next)
+	first->prev->next = first;
       else
 	gimple_seq_set_first (i->seq, first);
-      last->gsbase.next = cur;
-      cur->gsbase.prev = last;
+      last->next = cur;
+      cur->prev = last;
     }
   else
     {
@@ -149,11 +149,11 @@ gsi_insert_seq_nodes_before (gimple_stmt_iterator *i,
 	 labels, so it returns an iterator after the end of the block, and
 	 we need to insert before it; it might be cleaner to add a flag to the
 	 iterator saying whether we are at the start or end of the list).  */
-      last->gsbase.next = NULL;
+      last->next = NULL;
       if (itlast)
 	{
-	  first->gsbase.prev = itlast;
-	  itlast->gsbase.next = first;
+	  first->prev = itlast;
+	  itlast->next = first;
 	}
       else
 	gimple_seq_set_first (i->seq, first);
@@ -242,7 +242,7 @@ gsi_insert_seq_nodes_after (gimple_stmt_iterator *i,
   basic_block bb;
   gimple_seq_node cur = i->ptr;
 
-  gcc_assert (!cur || cur->gsbase.prev);
+  gcc_assert (!cur || cur->prev);
 
   /* If the iterator is inside a basic block, we need to update the
      basic block information for all the nodes between FIRST and LAST.  */
@@ -252,20 +252,20 @@ gsi_insert_seq_nodes_after (gimple_stmt_iterator *i,
   /* Link SEQ after CUR.  */
   if (cur)
     {
-      last->gsbase.next = cur->gsbase.next;
-      if (last->gsbase.next)
+      last->next = cur->next;
+      if (last->next)
 	{
-	  last->gsbase.next->gsbase.prev = last;
+	  last->next->prev = last;
 	}
       else
 	gimple_seq_set_last (i->seq, last);
-      first->gsbase.prev = cur;
-      cur->gsbase.next = first;
+      first->prev = cur;
+      cur->next = first;
     }
   else
     {
       gcc_assert (!gimple_seq_last (*i->seq));
-      last->gsbase.next = NULL;
+      last->next = NULL;
       gimple_seq_set_first (i->seq, first);
       gimple_seq_set_last (i->seq, last);
     }
@@ -347,15 +347,15 @@ gsi_split_seq_after (gimple_stmt_iterator i)
   cur = i.ptr;
 
   /* How can we possibly split after the end, or before the beginning?  */
-  gcc_assert (cur && cur->gsbase.next);
-  next = cur->gsbase.next;
+  gcc_assert (cur && cur->next);
+  next = cur->next;
 
   pold_seq = i.seq;
 
   gimple_seq_set_first (&new_seq, next);
   gimple_seq_set_last (&new_seq, gimple_seq_last (*pold_seq));
   gimple_seq_set_last (pold_seq, cur);
-  cur->gsbase.next = NULL;
+  cur->next = NULL;
 
   return new_seq;
 }
@@ -371,17 +371,17 @@ gsi_set_stmt (gimple_stmt_iterator *gsi, gimple stmt)
   gimple orig_stmt = gsi_stmt (*gsi);
   gimple prev, next;
 
-  stmt->gsbase.next = next = orig_stmt->gsbase.next;
-  stmt->gsbase.prev = prev = orig_stmt->gsbase.prev;
+  stmt->next = next = orig_stmt->next;
+  stmt->prev = prev = orig_stmt->prev;
   /* Note how we don't clear next/prev of orig_stmt.  This is so that
      copies of *GSI our callers might still hold (to orig_stmt)
      can be advanced as if they too were replaced.  */
-  if (prev->gsbase.next)
-    prev->gsbase.next = stmt;
+  if (prev->next)
+    prev->next = stmt;
   else
     gimple_seq_set_first (gsi->seq, stmt);
   if (next)
-    next->gsbase.prev = stmt;
+    next->prev = stmt;
   else
     gimple_seq_set_last (gsi->seq, stmt);
 
@@ -402,10 +402,10 @@ gsi_split_seq_before (gimple_stmt_iterator *i, gimple_seq *pnew_seq)
 
   /* How can we possibly split after the end?  */
   gcc_assert (cur);
-  prev = cur->gsbase.prev;
+  prev = cur->prev;
 
   old_seq = *i->seq;
-  if (!prev->gsbase.next)
+  if (!prev->next)
     *i->seq = NULL;
   i->seq = pnew_seq;
 
@@ -415,8 +415,8 @@ gsi_split_seq_before (gimple_stmt_iterator *i, gimple_seq *pnew_seq)
 
   /* Cut OLD_SEQ before I.  */
   gimple_seq_set_last (&old_seq, prev);
-  if (prev->gsbase.next)
-    prev->gsbase.next = NULL;
+  if (prev->next)
+    prev->next = NULL;
 }
 
 
@@ -576,20 +576,20 @@ gsi_remove (gimple_stmt_iterator *i, bool remove_permanently)
 
   /* Update the iterator and re-wire the links in I->SEQ.  */
   cur = i->ptr;
-  next = cur->gsbase.next;
-  prev = cur->gsbase.prev;
+  next = cur->next;
+  prev = cur->prev;
   /* See gsi_set_stmt for why we don't reset prev/next of STMT.  */
 
   if (next)
     /* Cur is not last.  */
-    next->gsbase.prev = prev;
-  else if (prev->gsbase.next)
+    next->prev = prev;
+  else if (prev->next)
     /* Cur is last but not first.  */
     gimple_seq_set_last (i->seq, prev);
 
-  if (prev->gsbase.next)
+  if (prev->next)
     /* Cur is not first.  */
-    prev->gsbase.next = next;
+    prev->next = next;
   else
     /* Cur is first.  */
     *i->seq = next;