tree-flow.h (struct var_ann_d): Remove need_phi_state and current_def members.

2012-07-31  Richard Guenther  <rguenther@suse.de>

	* tree-flow.h (struct var_ann_d): Remove need_phi_state
	and current_def members.
	* tree-into-ssa.c (struct def_blocks_d): Remove var member.
	(def_blocks): Remove.
	(struct var_info_d): New.
	(var_infos): New hashtable.
	(struct ssa_name_info): Add def_blocks member.
	(get_ssa_name_ann): Adjust.
	(get_var_info): New function.
	(get_phi_state, set_phi_state, get_current_def,
	set_current_def, get_def_blocks_for, find_def_blocks_for): Adjust.
	(insert_phi_nodes_compare_def_blocks): Rename to ...
	(insert_phi_nodes_compare_var_infos): ... this and adjust.
	(insert_phi_nodes): Adjust.
	(dump_tree_ssa, dump_tree_ssa_stats): Adjust.
	(def_blocks_hash, def_blocks_eq, def_blocks_free): Remove.
	(debug_def_blocks_r): Rename to ...
	(debug_var_infos_r): ... this and adjust.
	(var_info_hash): New function.
	(var_info_eq): Likewise.
	(rewrite_blocks): Adjust.
	(init_ssa_renamer): Likewise.
	(fini_ssa_renamer): Likewise.
	(delete_update_ssa): Likewise.
	(update_ssa): Likewise.
	* tree-ssanames.c (release_dead_ssa_names): Do not clear
	current defs.

From-SVN: r190012

gcc/ChangeLog

+2012-07-31  Richard Guenther  <rguenther@suse.de>
+
+	* tree-flow.h (struct var_ann_d): Remove need_phi_state
+	and current_def members.
+	* tree-into-ssa.c (struct def_blocks_d): Remove var member.
+	(def_blocks): Remove.
+	(struct var_info_d): New.
+	(var_infos): New hashtable.
+	(struct ssa_name_info): Add def_blocks member.
+	(get_ssa_name_ann): Adjust.
+	(get_var_info): New function.
+	(get_phi_state, set_phi_state, get_current_def,
+	set_current_def, get_def_blocks_for, find_def_blocks_for): Adjust.
+	(insert_phi_nodes_compare_def_blocks): Rename to ...
+	(insert_phi_nodes_compare_var_infos): ... this and adjust.
+	(insert_phi_nodes): Adjust.
+	(dump_tree_ssa, dump_tree_ssa_stats): Adjust.
+	(def_blocks_hash, def_blocks_eq, def_blocks_free): Remove.
+	(debug_def_blocks_r): Rename to ...
+	(debug_var_infos_r): ... this and adjust.
+	(var_info_hash): New function.
+	(var_info_eq): Likewise.
+	(rewrite_blocks): Adjust.
+	(init_ssa_renamer): Likewise.
+	(fini_ssa_renamer): Likewise.
+	(delete_update_ssa): Likewise.
+	(update_ssa): Likewise.
+	* tree-ssanames.c (release_dead_ssa_names): Do not clear
+	current defs.
+
 2012-07-31  Bill Schmidt  <wschmidt@linux.ibm.com>
 
 	PR tree-optimization/53773

gcc/tree-flow.h

@@ -184,17 +184,8 @@ struct GTY(()) var_ann_d {
      applied.  We set this when translating out of SSA form.  */
   unsigned used : 1;
 
-  /* This field indicates whether or not the variable may need PHI nodes.
-     See the enum's definition for more detailed information about the
-     states.  */
-  ENUM_BITFIELD (need_phi_state) need_phi_state : 2;
-
   /* Used by var_map for the base index of ssa base variables.  */
   unsigned base_index;
-
-  /* During into-ssa and the dominator optimizer, this field holds the
-     current version of this variable (an SSA_NAME).  */
-  tree current_def;
 };
 
 

gcc/tree-ssanames.c

@@ -380,15 +380,8 @@ replace_ssa_name_symbol (tree ssa_name, tree sym)
 static unsigned int
 release_dead_ssa_names (void)
 {
-  tree t;
   unsigned i, j;
   int n = VEC_length (tree, FREE_SSANAMES (cfun));
-  referenced_var_iterator rvi;
-
-  /* Current defs point to various dead SSA names that in turn point to
-     eventually dead variables so a bunch of memory is held live.  */
-  FOR_EACH_REFERENCED_VAR (cfun, t, rvi)
-    set_current_def (t, NULL);
 
   /* Now release the freelist.  */
   VEC_free (tree, gc, FREE_SSANAMES (cfun));