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.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@212191 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 26 insertions, 0 deletions

diff --git a/gcc/ipa-ref.h b/gcc/ipa-ref.h
index d2de006b3ca..b8b1f9e4216 100644
--- a/gcc/ipa-ref.h
+++ b/gcc/ipa-ref.h
@@ -82,6 +82,32 @@ public:
     return referring[0];
   }
 
+  /* Return first referring alias.  */
+  struct ipa_ref *first_alias (void)
+  {
+    struct ipa_ref *r = first_referring ();
+
+    return r && r->use == IPA_REF_ALIAS ? r : NULL;
+  }
+
+  /* Return last referring alias.  */
+  struct ipa_ref *last_alias (void)
+  {
+    unsigned int i = 0;
+
+    for(i = 0; i < referring.length (); i++)
+      if (referring[i]->use != IPA_REF_ALIAS)
+	break;
+
+    return i == 0 ? NULL : referring[i - 1];
+  }
+
+  /* Return true if the symbol has an alias.  */
+  bool inline has_aliases_p (void)
+  {
+    return first_alias ();
+  }
+
   /* Clear reference list.  */
   void clear (void)
   {