From e55637b71514b1f2106980ff1e8951d5d072f9c4 Mon Sep 17 00:00:00 2001
From: Martin Liska <mliska@suse.cz>
Date: Tue, 1 Jul 2014 08:45:26 +0200
Subject: 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
---
 gcc/symtab.c | 32 ++++++++++++++++++++++++++++++--
 1 file changed, 30 insertions(+), 2 deletions(-)

(limited to 'gcc/symtab.c')

diff --git a/gcc/symtab.c b/gcc/symtab.c
index 89591ee..80ea94a 100644
--- a/gcc/symtab.c
+++ b/gcc/symtab.c
@@ -558,8 +558,22 @@ symtab_node::add_reference (symtab_node *referred_node,
   ref = &list->references->last ();
 
   list2 = &referred_node->ref_list;
-  list2->referring.safe_push (ref);
-  ref->referred_index = list2->referring.length () - 1;
+
+  /* IPA_REF_ALIAS is always inserted at the beginning of the list.   */
+  if(use_type == IPA_REF_ALIAS)
+  {
+    list2->referring.safe_insert (0, ref);
+    ref->referred_index = 0;
+
+    for (unsigned int i = 1; i < list2->referring.length (); i++)
+      list2->referring[i]->referred_index = i;
+  }
+  else
+  {
+    list2->referring.safe_push (ref);
+    ref->referred_index = list2->referring.length () - 1;
+  }
+
   ref->referring = this;
   ref->referred = referred_node;
   ref->stmt = stmt;
@@ -796,6 +810,20 @@ symtab_node::iterate_referring (unsigned i, struct ipa_ref *&ref)
   return ref;
 }
 
+/* Iterates I-th referring alias item in the list, REF is also set.  */
+
+struct ipa_ref *
+symtab_node::iterate_direct_aliases (unsigned i, struct ipa_ref *&ref)
+{
+  ref_list.referring.iterate (i, &ref);
+
+  if (ref && ref->use != IPA_REF_ALIAS)
+    return NULL;
+
+  return ref;
+}
+
+
 static const char * const symtab_type_names[] = {"symbol", "function", "variable"};
 
 /* Dump base fields of symtab nodes.  Not to be used directly.  */
-- 
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