lto-symtab.c (lto_cgraph_replace_node): Kill same body alias code.

	* lto-symtab.c (lto_cgraph_replace_node): Kill same body alias code.
	(lto_symtab_resolve_can_prevail_p): Likewise.
	(lto_symtab_merge_cgraph_nodes): Update merging of aliases.
	* cgraph.c (same_body_aliases_done): New global var.
	(cgraph_same_body_alias_1): Rename to ...
	(cgraph_create_function_alias): ... this one; reorg to new
	representation.
	(cgraph_same_body_alias): Use cgraph_create_function_alias;
	record references when asked to.
	(cgraph_add_thunk): Fix formating.
	(cgraph_get_node): Kill same body alias code.
	(cgraph_node_for_asm): Likewise.
	(cgraph_remove_same_body_alias): Remove.
	(cgraph_remove_node): Kill same body alias code.
	(cgraph_mark_address_taken_node): Mark also the aliased function
	as having address taken.
	(dump_cgraph_node): Dump same body aliases.
	(cgraph_for_node_thunks_and_aliases): Update for new alias
	representation.
	(cgraph_for_node_and_aliases): Likewise.
	* cgraph.h (same_body): Kll pointer.
	(same_body_alias): Update comment.
	(same_body_aliases_done): Declare.
	(cgraph_remove_same_body_alias): Remove declaration.
	(cgraph_create_function_alias): Declare.
	(cgraph_process_same_body_aliases): Declare.
	(cgraph_function_with_gimple_body_p): Check for alias.
	(cgraph_can_remove_if_no_direct_calls_p): Look for aliases.
	(cgraph_alias_aliased_node): New function.
	(cgraph_function_node): Update for new aliases.
	(cgraph_function_or_thunk_node): Likewise.
	* ipa-inline-transform.c (can_remove_node_now_p): Look for aliases.
	(inline_call): Remove dead aliases.
	* cgraphunit.c (cgraph_decide_is_function_needed): Disable assembler name
	hack for same body aliases.
	(clone_of_p): Look through aliases.
	(verify_cgraph_node): Verify aliases.
	(cgraph_analyze_function): Analyze aliases; fixup C++ bugs.
	(cgraph_process_same_body_aliases): New function.
	(process_function_and_variable_attributes): Disable weakref warning on
	alias.
	(cgraph_analyze_functions): Handle aliases.
	(cgraph_mark_functions_to_output): Handle aliases same way as thunks.
	(assemble_thunks): Rename to ...
	(assemble_thunks_and_aliases): ... this one; handle aliases, too.
	(cgraph_expand_function): Remove alias output code.
	(cgraph_output_in_order): Skip aliases.
	(cgraph_preserve_function_body_p): Aliases don't need preserving.
	* ipa-ref.c (ipa_ref_use_name): Add alias reference.
	(ipa_record_reference): Do not assert on alias references.
	(ipa_ref_has_aliases_p): New function.
	* ipa-ref.h (enum ipa_ref_use): Add IPA_REF_ALIAS.
	(ipa_ref_has_aliases_p): Declare.
	* lto-cgraph.c (lto_output_node): Handle aliases.
	(input_node): Likewise.
	* lto-streamer-out.c (lto_output): Skip aliases.
	(produce_symtab): Kill same_body_alias code.
	* ipa-utils.c (ipa_reverse_postorder): Add FIXME.
	(ipa_reverse_postorder): Use cgraph_only_called_directly_or_aliased_p.
	* ipa-inline.c (update_caller_keys): Walk aliases.
	(inline_small_functions): Fix thinko in previous patch.
	* ipa.c (cgraph_externally_visible_p): Do not walk aliases.
	(function_and_variable_visibility): Do not walk same body aliases.
	* tree-ssa-structalias.c (associate_varinfo_to_alias): New function.
	(ipa_pta_execute): Use it.

	* lto.c (add_cgraph_node_to_partition_1): Break out from ...
	(add_cgraph_node_to_partition) ... here; walk aliases.
	(lto_1_to_1_map): Remove same body alias code.
	(promote_fn): Likewise.
	(lto_promote_cross_file_statics): Update comment.

	* decl2.c (cp_write_global_declarations): Process aliases; look trhough
	same body aliases.

From-SVN: r174952

1 files changed, 14 insertions, 43 deletions

diff --git a/gcc/lto-cgraph.c b/gcc/lto-cgraph.c
index 3b1115b53f6..169de382dbe 100644
--- a/gcc/lto-cgraph.c
+++ b/gcc/lto-cgraph.c
@@ -504,7 +504,7 @@ lto_output_node (struct lto_simple_output_block *ob, struct cgraph_node *node,
 		     || referenced_from_other_partition_p (&node->ref_list, set, vset)), 1);
   bp_pack_value (&bp, node->lowered, 1);
   bp_pack_value (&bp, in_other_partition, 1);
-  bp_pack_value (&bp, node->alias, 1);
+  bp_pack_value (&bp, node->alias && !boundary_p, 1);
   bp_pack_value (&bp, node->frequency, 2);
   bp_pack_value (&bp, node->only_called_at_startup, 1);
   bp_pack_value (&bp, node->only_called_at_exit, 1);
@@ -523,32 +523,15 @@ lto_output_node (struct lto_simple_output_block *ob, struct cgraph_node *node,
 				 node->thunk.fixed_offset);
       lto_output_uleb128_stream (ob->main_stream,
 				 node->thunk.virtual_value);
-      lto_output_fn_decl_index (ob->decl_state, ob->main_stream,
-				node->thunk.alias);
     }
-
-  if (node->same_body)
+  if ((node->alias || node->thunk.thunk_p) && !boundary_p)
     {
-      struct cgraph_node *alias;
-      unsigned long alias_count = 1;
-      for (alias = node->same_body; alias->next; alias = alias->next)
-	alias_count++;
-      lto_output_uleb128_stream (ob->main_stream, alias_count);
-      do
-	{
-	  lto_output_fn_decl_index (ob->decl_state, ob->main_stream,
-				    alias->decl);
-	  lto_output_fn_decl_index (ob->decl_state, ob->main_stream,
-				    alias->thunk.alias);
-	  gcc_assert (cgraph_get_node (alias->thunk.alias) == node);
-	  lto_output_enum (ob->main_stream, ld_plugin_symbol_resolution,
-			   LDPR_NUM_KNOWN, alias->resolution);
-	  alias = alias->previous;
-	}
-      while (alias);
+      lto_output_int_in_range (ob->main_stream, 0, 1,
+			       node->thunk.alias != NULL);
+      if (node->thunk.alias != NULL)
+        lto_output_fn_decl_index (ob->decl_state, ob->main_stream,
+			          node->thunk.alias);
     }
-  else
-    lto_output_uleb128_stream (ob->main_stream, 0);
 }
 
 /* Output the varpool NODE to OB. 
@@ -997,7 +980,6 @@ input_node (struct lto_file_decl_data *file_data,
   struct bitpack_d bp;
   unsigned decl_index;
   int ref = LCC_NOT_FOUND, ref2 = LCC_NOT_FOUND;
-  unsigned long same_body_count = 0;
   int clone_ref;
 
   clone_ref = lto_input_sleb128 (ib);
@@ -1043,31 +1025,20 @@ input_node (struct lto_file_decl_data *file_data,
       int type = lto_input_uleb128 (ib);
       HOST_WIDE_INT fixed_offset = lto_input_uleb128 (ib);
       HOST_WIDE_INT virtual_value = lto_input_uleb128 (ib);
-      tree real_alias;
 
-      decl_index = lto_input_uleb128 (ib);
-      real_alias = lto_file_decl_data_get_fn_decl (file_data, decl_index);
       node->thunk.fixed_offset = fixed_offset;
       node->thunk.this_adjusting = (type & 2);
       node->thunk.virtual_value = virtual_value;
       node->thunk.virtual_offset_p = (type & 4);
-      node->thunk.alias = real_alias;
     }
-
-  same_body_count = lto_input_uleb128 (ib);
-  while (same_body_count-- > 0)
+  if (node->thunk.thunk_p || node->alias)
     {
-      tree alias_decl, real_alias;
-      struct cgraph_node *alias;
-
-      decl_index = lto_input_uleb128 (ib);
-      alias_decl = lto_file_decl_data_get_fn_decl (file_data, decl_index);
-      decl_index = lto_input_uleb128 (ib);
-      real_alias = lto_file_decl_data_get_fn_decl (file_data, decl_index);
-      alias = cgraph_same_body_alias (node, alias_decl, real_alias);
-      gcc_assert (alias);
-      alias->resolution = lto_input_enum (ib, ld_plugin_symbol_resolution,
-					  LDPR_NUM_KNOWN);
+      if (lto_input_int_in_range (ib, "alias nonzero flag", 0, 1))
+	{
+          decl_index = lto_input_uleb128 (ib);
+          node->thunk.alias = lto_file_decl_data_get_fn_decl (file_data,
+							      decl_index);
+	}
     }
   return node;
 }