ipa.c (cgraph_externally_visible_p, [...]): Local comdats are not externally visible.

	* ipa.c (cgraph_externally_visible_p, varpool_externally_visible_p):
	Local comdats are not externally visible.
	* symtab.c (dump_symtab_base): Dump externally visible.
	(verify_symtab_base): Verify back links in the symtab hash.

From-SVN: r200064

gcc/ChangeLog

+2013-06-13  Jan Hubicka  <jh@suse.cz>
+
+	* ipa.c (cgraph_externally_visible_p, varpool_externally_visible_p):
+	Local comdats are not externally visible.
+	* symtab.c (dump_symtab_base): Dump externally visible.
+	(verify_symtab_base): Verify back links in the symtab hash.
+
 2013-06-13  Bin Cheng  <bin.cheng@arm.com>
 
 	* fold-const.c (operand_equal_p): Consider NOP_EXPR and

gcc/ipa.c

@@ -606,9 +606,8 @@ cgraph_externally_visible_p (struct cgraph_node *node,
 {
   if (!node->symbol.definition)
     return false;
-  if (!DECL_COMDAT (node->symbol.decl)
-      && (!TREE_PUBLIC (node->symbol.decl)
-	  || DECL_EXTERNAL (node->symbol.decl)))
+  if (!TREE_PUBLIC (node->symbol.decl)
+      || DECL_EXTERNAL (node->symbol.decl))
     return false;
 
   /* Do not try to localize built-in functions yet.  One of problems is that we
@@ -667,7 +666,7 @@ varpool_externally_visible_p (struct varpool_node *vnode)
   if (DECL_EXTERNAL (vnode->symbol.decl))
     return true;
 
-  if (!DECL_COMDAT (vnode->symbol.decl) && !TREE_PUBLIC (vnode->symbol.decl))
+  if (!TREE_PUBLIC (vnode->symbol.decl))
     return false;
 
   /* If linker counts on us, we must preserve the function.  */

gcc/symtab.c

@@ -508,6 +508,8 @@ dump_symtab_base (FILE *f, symtab_node node)
     fprintf (f, " force_output");
   if (node->symbol.forced_by_abi)
     fprintf (f, " forced_by_abi");
+  if (node->symbol.externally_visible)
+    fprintf (f, " externally_visible");
   if (node->symbol.resolution != LDPR_UNKNOWN)
     fprintf (f, " %s",
  	     ld_plugin_symbol_resolution_names[(int)node->symbol.resolution]);
@@ -655,6 +657,15 @@ verify_symtab_base (symtab_node node)
 	  error ("node not found in symtab decl hashtable");
 	  error_found = true;
 	}
+      if (hashed_node != node
+	  && (!is_a <cgraph_node> (node)
+	      || !dyn_cast <cgraph_node> (node)->clone_of
+	      || dyn_cast <cgraph_node> (node)->clone_of->symbol.decl
+		 != node->symbol.decl))
+	{
+	  error ("node differs from symtab decl hashtable");
+	  error_found = true;
+	}
     }
   if (assembler_name_hash)
     {