re PR tree-optimization/26830 (Repeated SSA update during loop header copying)

	PR tree-optimization/26830
	* tree-into-ssa.c (struct ssa_name_info): Add age field.
	(info_for_ssa_name, current_info_for_ssa_name_age,
	blocks_to_update): New variables.
	(get_ssa_name_ann): Use info_for_ssa_name instead of SSA_NAME_AUX.
	(clear_ssa_name_info, initialize_flags_in_bb,
	mark_block_for_update): New functions.
	(mark_def_sites, rewrite_stmt): Assert that blocks_to_update is NULL.
	(insert_phi_nodes_for, mark_use_interesting, prepare_block_for_update,
	prepare_def_site_for): Use mark_block_for_update.
	(mark_def_interesting): Assert that the processed block is marked in
	blocks_to_update.  Do not take blocks argument.
	(prepare_use_sites_for, prepare_names_to_update): Do not take blocks
	argument.
	(rewrite_update_init_block, rewrite_update_stmt): Only process
	blocks with statements to rewrite.
	(delete_update_ssa): Do not clear SSA_NAME_AUX.
	(update_ssa): Initialize and free blocks_to_update.  Do not
	clear flags on statements.  Do not use blocks bitmap.
	* tree.h (SSA_NAME_AUX): Removed.
	(struct tree_ssa_name): Removed aux field.
	* print-tree.c (print_node): Do not print SSA_NAME_AUX.

From-SVN: r113799

gcc/ChangeLog

+2006-05-15  Zdenek Dvorak <dvorakz@suse.cz>
+
+	PR tree-optimization/26830
+	* tree-into-ssa.c (struct ssa_name_info): Add age field.
+	(info_for_ssa_name, current_info_for_ssa_name_age,
+	blocks_to_update): New variables.
+	(get_ssa_name_ann): Use info_for_ssa_name instead of SSA_NAME_AUX.
+	(clear_ssa_name_info, initialize_flags_in_bb,
+	mark_block_for_update): New functions.
+	(mark_def_sites, rewrite_stmt): Assert that blocks_to_update is NULL.
+	(insert_phi_nodes_for, mark_use_interesting, prepare_block_for_update,
+	prepare_def_site_for): Use mark_block_for_update.
+	(mark_def_interesting): Assert that the processed block is marked in
+	blocks_to_update.  Do not take blocks argument.
+	(prepare_use_sites_for, prepare_names_to_update): Do not take blocks
+	argument.
+	(rewrite_update_init_block, rewrite_update_stmt): Only process
+	blocks with statements to rewrite.
+	(delete_update_ssa): Do not clear SSA_NAME_AUX.
+	(update_ssa): Initialize and free blocks_to_update.  Do not
+	clear flags on statements.  Do not use blocks bitmap.
+	* tree.h (SSA_NAME_AUX): Removed.
+	(struct tree_ssa_name): Removed aux field.
+	* print-tree.c (print_node): Do not print SSA_NAME_AUX.
+
 2006-05-15  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/27603

gcc/print-tree.c

@@ -822,8 +822,7 @@ print_node (FILE *file, const char *prefix, tree node, int indent)
 	    fprintf (file, " in-free-list");
 
 	  if (SSA_NAME_PTR_INFO (node)
-	      || SSA_NAME_VALUE (node)
-	      || SSA_NAME_AUX (node))
+	      || SSA_NAME_VALUE (node))
 	    {
 	      indent_to (file, indent + 3);
 	      if (SSA_NAME_PTR_INFO (node))
@@ -832,8 +831,6 @@ print_node (FILE *file, const char *prefix, tree node, int indent)
 	      if (SSA_NAME_VALUE (node))
 		fprintf (file, " value %p",
 			 (void *) SSA_NAME_VALUE (node));
-	      if (SSA_NAME_AUX (node))
-		fprintf (file, " aux %p", SSA_NAME_AUX (node));
 	    }
 	  break;
 

gcc/tree.h

@@ -1678,10 +1678,6 @@ struct tree_exp GTY(())
 #define SSA_NAME_VALUE(N) \
    SSA_NAME_CHECK (N)->ssa_name.value_handle
 
-/* Auxiliary pass-specific data.  */
-#define SSA_NAME_AUX(N) \
-   SSA_NAME_CHECK (N)->ssa_name.aux
-
 #ifndef _TREE_FLOW_H
 struct ptr_info_def;
 #endif
@@ -1721,9 +1717,6 @@ struct tree_ssa_name GTY(())
      as well.  */
   tree value_handle;
 
-  /* Auxiliary information stored with the ssa name.  */
-  PTR GTY((skip)) aux;
-
   /* Immediate uses list for this SSA_NAME.  */
   struct ssa_use_operand_d imm_uses;
 };