cgraphbuild.c (record_reference_ctx): Add varpool_node.

	* cgraphbuild.c (record_reference_ctx): Add varpool_node.
	(record_reference, mark_address, mark_load, mark_store): Record
	references.
	(record_references_in_initializer): Update call of record_references.
	(rebuild_cgraph_edges): Remove all references before rebuiding.
	* cgraph.c (cgraph_create_node): Clear ref list.
	(cgraph_remove_node): Remove references.
	(dump_cgraph_node): Dump references.
	(cgraph_clone_node): Clone references.
	* cgraph.h: Include ipa-ref.h and ipa-ref-inline.h
	(struct cgraph_node, varpool_node): Add ref_lst.
	* ipa-ref.c: New file.
	* ipa-ref.h: New file.
	* ipa-ref-inline.h: New file.
	* lto-cgraph.c (output_varpool): Take cgrag node set argument.
	(referenced_from_other_partition_p): New function.
	(lto_output_varpool_node): Take set arugment; call
	referenced_from_other_partition.
	(lto_output_ref): New.
	(add_references): New.
	(output_refs): New.
	(output_cgraph): Compute boundary based on references;
	output refs.
	(output_varpool): Accept cgraph_node_set argument.
	(input_ref): New.
	(input_refs): New.
	(input_cgraph): Call input_refs.
	* lto-section-in.c (lto_section_name): Add refs.
	* Makefile.in: (cgraph.h): Include ipa-ref.h and ipa-ref-inline.h
	(ipa-ref.o): New file.
	* varpool.c (varpool_node): Clear ipa ref list.
	(varpool_remove_node): Remove references.
	(dump_varpool_node): Dump references.
	(varpool_assemble_decl): Only compile finalized ones.
	(varpool_extra_name_alias): Initialize ref list.
	* lto-streamer.c (lto-get_section_name): Add .refs section.
	* lto-streamer.h (lto_section_type): Add LTO_section_refs.
	(referenced_from_other_partition_p): Declared.

From-SVN: r159097

1 files changed, 8 insertions, 0 deletions

diff --git a/gcc/lto-symtab.c b/gcc/lto-symtab.c
index c9ec62e45fa..83a64bbf345 100644
--- a/gcc/lto-symtab.c
+++ b/gcc/lto-symtab.c
@@ -214,6 +214,8 @@ lto_cgraph_replace_node (struct cgraph_node *node,
       next = e->next_caller;
       cgraph_redirect_edge_callee (e, prevailing_node);
     }
+  /* Redirect incomming references.  */
+  ipa_clone_refering (prevailing_node, NULL, &node->ref_list);
 
   if (node->same_body)
     {
@@ -273,6 +275,12 @@ lto_varpool_replace_node (struct varpool_node *vnode,
   gcc_assert (!vnode->finalized || prevailing_node->finalized);
   gcc_assert (!vnode->analyzed || prevailing_node->analyzed);
 
+  /* When replacing by an alias, the references goes to the original
+     variable.  */
+  if (prevailing_node->alias && prevailing_node->extra_name)
+    prevailing_node = prevailing_node->extra_name;
+  ipa_clone_refering (NULL, prevailing_node, &vnode->ref_list);
+
   /* Finally remove the replaced node.  */
   varpool_remove_node (vnode);
 }