PR c++/3187

	* cgraph.h (struct cgraph_node): Add same_body and same_body_alias
	fields.
	(cgraph_same_body_alias, cgraph_remove_same_body_alias): New
	prototypes.
	* cgraphunit.c (cgraph_expand_function, cgraph_emit_thunks,
	cgraph_materialize_all_clones): Handle same_body aliases.
	* cgraph.c (cgraph_allocate_node): New function.
	(cgraph_create_node): Use it.
	(cgraph_node_for_decl, cgraph_node, cgraph_get_node,
	cgraph_node_for_asm, cgraph_remove_node): Handle same_body aliases.
	(cgraph_same_body_alias, cgraph_remove_same_body_alias): New
	functions.
	* lto-cgraph.c (lto_output_node): Stream out same_body aliases.
	(input_node): Stream in same_body aliases.
	* lto-symtab.c (lto_cgraph_replace_node): Clear node pointers
	for same_body aliases.
	(lto_symtab_merge_cgraph_nodes_1): Handle same_body aliases.

	* cp-tree.h (expand_or_defer_fn_1): New prototype.
	* decl2.c (cp_write_global_declarations): Mark as !DECL_EXTERNAL
	also all same_body aliases.
	* semantics.c (expand_or_defer_fn): Move most of the function
	except registering with cgraph to ...
	(expand_or_defer_fn_1): ... here.  New function.
	* optimize.c: Include cgraph.h.
	(maybe_clone_body): If in charge parm is not used and both base
	and complete clones are created and are not comdat, tell cgraph
	they have the same body.
	* Make-lang.in (cp/optimize.o): Depend on $(CGRAPH_H).

	* g++.dg/abi/mangle26.C: Also match *C2* definition.
	* g++.dg/abi/mangle27.C: Likewise.
	* g++.dg/abi/mangle28.C: Likewise.
	* g++.dg/abi/mangle29.C: Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@154284 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 8 insertions, 0 deletions

diff --git a/gcc/cgraph.h b/gcc/cgraph.h
index 33eb821dd5d..02c087d772e 100644
--- a/gcc/cgraph.h
+++ b/gcc/cgraph.h
@@ -184,6 +184,9 @@ struct GTY((chain_next ("%h.next"), chain_prev ("%h.previous"))) cgraph_node {
   struct cgraph_node *prev_sibling_clone;
   struct cgraph_node *clones;
   struct cgraph_node *clone_of;
+  /* For normal nodes pointer to the list of alias nodes, in alias
+     nodes pointer to the normal node.  */
+  struct cgraph_node *same_body;
   /* For functions with many calls sites it holds map from call expression
      to the edge to speed up cgraph_edge function.  */
   htab_t GTY((param_is (struct cgraph_edge))) call_site_hash;
@@ -241,6 +244,9 @@ struct GTY((chain_next ("%h.next"), chain_prev ("%h.previous"))) cgraph_node {
   unsigned alias : 1;
   /* Set for nodes that was constructed and finalized by frontend.  */
   unsigned finalized_by_frontend : 1;
+  /* Set for alias nodes, same_body points to the node they are alias of
+     and they are linked through the next/previous pointers.  */
+  unsigned same_body_alias : 1;
 };
 
 typedef struct cgraph_node *cgraph_node_ptr;
@@ -416,6 +422,8 @@ struct cgraph_edge *cgraph_create_edge (struct cgraph_node *,
 
 struct cgraph_node * cgraph_get_node (tree);
 struct cgraph_node *cgraph_node (tree);
+bool cgraph_same_body_alias (tree, tree);
+void cgraph_remove_same_body_alias (struct cgraph_node *);
 struct cgraph_node *cgraph_node_for_asm (tree);
 struct cgraph_node *cgraph_node_for_decl (tree);
 struct cgraph_edge *cgraph_edge (struct cgraph_node *, gimple);