* compare-elim.c (find_comparison_dom_walker): New class
(find_comparisons_in_bb): Rename to
find_comparison_dom_walker::before_dom_children
(find_comparisons): Adjust
* domwalk.c (walk_dominator_tree): Rename to dom_walker::walk, and
adjust.
(init_walk_dominator_tree, fini_walk_dominator_tree): Remove
* domwalk.h (dom_walk_data): Convert it To a class dom_walker.
(init_walk_dominator_tree): Remove declaration.
(fini_walk_dominator_tree): Remove declaration.
* fwprop.c (single_def_use_dom_walker): New class
(single_def_use_enter_block): Convert to
single_def_use_dom_walker::before_dom_children.
(single_def_use_leave_block): Convert to
single_def_use_dom_walker::after_dom_children.
(build_single_def_use_links): Adjust.
* gimple-ssa-strength-reduction.c (find_candidates_dom_walker): New
class.
(find_candidates_in_block): Convert to
find_candidates_dom_walker::before_dom_children.
(execute_strength_reduction): Adjust.
* graphite-sese-to-poly.c (struct bsc, build_sese_conditions): Remove.
(sese_dom_walker): New class.
(sese_dom_walker::sese_dom_walker): New constructor.
(sese_dom_walker::~sese_dom_walker): New destructor.
(build_sese_conditions_before): Convert to
sese_dom_walker::before_dom_children.
(build_sese_conditions_after): Convert to
sese_dom_walker::after_dom_children.
(build_poly_scop): Adjust
* tree-into-ssa.c (rewrite_dom_walker): New class
(rewrite_enter_block): Convert to
rewrite_dom_walker::before_dom_children.
(rewrite_leave_block): Convert to
rewrite_dom_walker::after_dom_children.
(rewrite_update_dom_walker): New class.
(rewrite_update_enter_block): Convert to
rewrite_update_dom_walker::before_dom_children.
(rewrite_update_leave_block): Convert to
rewrite_update_dom_walker::after_dom_children.
(rewrite_blocks, rewrite_into_ssa): Adjust.
(mark_def_dom_walker): New class.
(mark_def_dom_walker::mark_def_dom_walker): New constructor.
(mark_def_dom_walker::~mark_def_dom_walker): New destructor.
(mark_def_sites_blocks): Convert to
mark_def_dom_walker::before_dom_children.
(mark_def_site_blocks): Remove.
* tree-ssa-dom.c (dom_opt_dom_walker): New class.
(tree_ssa_dominator_optimize): Adjust.
(dom_thread_across_edge): Convert to method
dom_opt_dom_walker::thread_across_edge.
(dom_opt_enter_block): Convert to member function
dom_opt_dom_walker::before_dom_children.
(dom_opt_leave_block): Convert to member function
dom_opt_dom_walker::after_dom_children.
* tree-ssa-dse.c (dse_dom_walker): New class.
(dse_enter_block): Convert to member function
dse_dom_walker::before_dom_children.
(tree_ssa_dse): Adjust.
* tree-ssa-loop-im.c (invariantness_dom_walker): New class.
(determine_invariantness_stmt): Convert to method
invariantness_dom_walker::before_dom_children.
(determine_invariantness): Remove
(move_computations_dom_walker): New class.
(move_computations_stmt): Convert to method
move_computations_dom_walker::before_dom_children.
(move_computations, tree_ssa_lim): Adjust.
* tree-ssa-phiopt.c (nontrapping_dom_walker): new class
(nt_init_block): Make method
notrappping_dom_walker::before_dom_children.
(nt_fini_block): Make
method nontrapping_dom_walker::after_dom_children.
(get_non_trapping): Adjust.
* tree-ssa-pre.c (eliminate_dom_walker): New class.
(eliminate_bb): Make method eliminate_dom_walker::before_dom_children.
(eliminate_leave_block): Make method.
eliminate_dom_walker::after_dom_children.
(eliminate): Adjust
* tree-ssa-strlen.c (strlen_dom_walker): New class.
(strlen_enter_block): Make method
strlen_dom_walker::before_dom_children.
(strlen_leave_block): Make
method strlen_dom_walker::after_dom_children.
(tree_ssa_strlen): Adjust.
* tree-ssa-uncprop.c (uncprop_dom_walker): New class.
(tree_ssa_uncprop): Adjust.
(uncprop_leave_block): Make method
uncprop_dom_walker::after_dom_children.
(uncprop_leave_block): Make method
uncprop_dom_walker::before_dom_children.
From-SVN: r202679
