IPA REF alias refactoring

	* cgraph.h (iterate_direct_aliases): New function.
	(FOR_EACH_ALIAS): New macro iterates all direct aliases for a node.
	* cgraph.c (cgraph_for_node_thunks_and_aliases): Usage of
	FOR_EACH_ALIAS added.
	(cgraph_for_node_and_aliases): Likewise.
	* cgraphunit.c (assemble_thunks_and_aliases): Likewise.
	* ipa-inline.c (reset_edge_caches): Likewise.
	(update_caller_keys): Likewise.
	* trans-mem.c (ipa_tm_execute): Likewise.
	*varpool.c (varpool_analyze_node): Likewise.
	(varpool_for_node_and_aliases): Likewise.
	* ipa-ref.h (first_alias): New function.
	(last_alias): Likewise.
	(has_aliases_p): Likewise.
	* ipa-ref.c (ipa_ref::remove_reference): Removal function
	is sensitive to IPA_REF_ALIASes.
	* symtab.c (symtab_node::add_reference): Node of IPA_REF_ALIAS type
	are put at the beginning of the list.
	(symtab_node::iterate_direct_aliases): New function.

	* lto-partition.c (add_symbol_to_partition_1): Usage of
	FOR_EACH_ALIAS added.

From-SVN: r212191

1 files changed, 19 insertions, 22 deletions

diff --git a/gcc/varpool.c b/gcc/varpool.c
index 04ac870..79f07bf 100644
--- a/gcc/varpool.c
+++ b/gcc/varpool.c
@@ -424,17 +424,15 @@ varpool_analyze_node (varpool_node *node)
 static void
 assemble_aliases (varpool_node *node)
 {
-  int i;
-  struct ipa_ref *ref = NULL;
+  struct ipa_ref *ref;
 
-  for (i = 0; node->iterate_referring (i, ref); i++)
-    if (ref->use == IPA_REF_ALIAS)
-      {
-	varpool_node *alias = dyn_cast <varpool_node *> (ref->referring);
-	do_assemble_alias (alias->decl,
-			   DECL_ASSEMBLER_NAME (node->decl));
-	assemble_aliases (alias);
-      }
+  FOR_EACH_ALIAS (node, ref)
+    {
+      varpool_node *alias = dyn_cast <varpool_node *> (ref->referring);
+      do_assemble_alias (alias->decl,
+			 DECL_ASSEMBLER_NAME (node->decl));
+      assemble_aliases (alias);
+    }
 }
 
 /* Output one variable, if necessary.  Return whether we output it.  */
@@ -694,20 +692,19 @@ varpool_for_node_and_aliases (varpool_node *node,
 			      void *data,
 			      bool include_overwritable)
 {
-  int i;
-  struct ipa_ref *ref = NULL;
+  struct ipa_ref *ref;
 
   if (callback (node, data))
     return true;
-  for (i = 0; node->iterate_referring (i, ref); i++)
-    if (ref->use == IPA_REF_ALIAS)
-      {
-	varpool_node *alias = dyn_cast <varpool_node *> (ref->referring);
-	if (include_overwritable
-	    || cgraph_variable_initializer_availability (alias) > AVAIL_OVERWRITABLE)
-          if (varpool_for_node_and_aliases (alias, callback, data,
-					   include_overwritable))
-	    return true;
-      }
+
+  FOR_EACH_ALIAS (node, ref)
+    {
+      varpool_node *alias = dyn_cast <varpool_node *> (ref->referring);
+      if (include_overwritable
+	  || cgraph_variable_initializer_availability (alias) > AVAIL_OVERWRITABLE)
+	if (varpool_for_node_and_aliases (alias, callback, data,
+					 include_overwritable))
+	  return true;
+    }
   return false;
 }