* 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.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@202679 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 12 insertions, 17 deletions

diff --git a/gcc/gimple-ssa-strength-reduction.c b/gcc/gimple-ssa-strength-reduction.c
index 53ed6b34332..8d48adde01d 100644
--- a/gcc/gimple-ssa-strength-reduction.c
+++ b/gcc/gimple-ssa-strength-reduction.c
@@ -1571,11 +1571,18 @@ slsr_process_copy (gimple gs, tree rhs1, bool speed)
   add_cand_for_stmt (gs, c);
 }
 
+class find_candidates_dom_walker : public dom_walker
+{
+public:
+  find_candidates_dom_walker (cdi_direction direction)
+    : dom_walker (direction) {}
+  virtual void before_dom_children (basic_block);
+};
+
 /* Find strength-reduction candidates in block BB.  */
 
-static void
-find_candidates_in_block (struct dom_walk_data *walk_data ATTRIBUTE_UNUSED,
-			  basic_block bb)
+void
+find_candidates_dom_walker::before_dom_children (basic_block bb)
 {
   bool speed = optimize_bb_for_speed_p (bb);
   gimple_stmt_iterator gsi;
@@ -3488,8 +3495,6 @@ analyze_candidates_and_replace (void)
 static unsigned
 execute_strength_reduction (void)
 {
-  struct dom_walk_data walk_data;
-
   /* Create the obstack where candidates will reside.  */
   gcc_obstack_init (&cand_obstack);
 
@@ -3509,18 +3514,10 @@ execute_strength_reduction (void)
      back edges, and this gives us dominator information as well.  */
   loop_optimizer_init (AVOID_CFG_MODIFICATIONS);
 
-  /* Set up callbacks for the generic dominator tree walker.  */
-  walk_data.dom_direction = CDI_DOMINATORS;
-  walk_data.initialize_block_local_data = NULL;
-  walk_data.before_dom_children = find_candidates_in_block;
-  walk_data.after_dom_children = NULL;
-  walk_data.global_data = NULL;
-  walk_data.block_local_data_size = 0;
-  init_walk_dominator_tree (&walk_data);
-
   /* Walk the CFG in predominator order looking for strength reduction
      candidates.  */
-  walk_dominator_tree (&walk_data, ENTRY_BLOCK_PTR);
+  find_candidates_dom_walker (CDI_DOMINATORS)
+    .walk (cfun->cfg->x_entry_block_ptr);
 
   if (dump_file && (dump_flags & TDF_DETAILS))
     {
@@ -3531,8 +3528,6 @@ execute_strength_reduction (void)
   /* Analyze costs and make appropriate replacements.  */
   analyze_candidates_and_replace ();
 
-  /* Free resources.  */
-  fini_walk_dominator_tree (&walk_data);
   loop_optimizer_finalize ();
   base_cand_map.dispose ();
   obstack_free (&chain_obstack, NULL);