re PR ipa/58329 (ld: Invalid symbol type for plabel…

re PR ipa/58329 (ld: Invalid symbol type for plabel (.libs/libstdc++.lax/libc++11convenience.a/system_error.o, std::error_category::default_error_condition(int) const [clone .localalias.9]).)

	PR middle-end/58329
	* ipa-devirt.c (ipa_devirt): Be ready for symtab_nonoverwritable_alias
	to return NULL.
	* ipa.c (function_and_variable_visibility): Likewise.
	* ipa-profile.c (ipa_profile): Likewise.

From-SVN: r202657

gcc/ChangeLog

+2013-09-17  Jan Hubicka  <jh@suse.cz>
+
+	PR middle-end/58329
+	* ipa-devirt.c (ipa_devirt): Be ready for symtab_nonoverwritable_alias
+	to return NULL.
+	* ipa.c (function_and_variable_visibility): Likewise.
+	* ipa-profile.c (ipa_profile): Likewise.
+
 2013-09-17  Bernd Edlinger  <bernd.edlinger@hotmail.de>
 
 	PR ipa/58398

gcc/ipa-devirt.c

@@ -1098,7 +1098,13 @@ ipa_devirt (void)
 			   cgraph_node_name (likely_target),
 			   likely_target->symbol.order);
 		if (!symtab_can_be_discarded ((symtab_node) likely_target))
-		  likely_target = cgraph (symtab_nonoverwritable_alias ((symtab_node)likely_target));
+		  {
+		    cgraph_node *alias;
+		    alias = cgraph (symtab_nonoverwritable_alias
+				     ((symtab_node)likely_target));
+		    if (alias)
+		      likely_target = alias;
+		  }
 		nconverted++;
 		update = true;
 		cgraph_turn_edge_to_speculative

gcc/ipa-profile.c

@@ -625,7 +625,13 @@ ipa_profile (void)
 			 of N2.  Speculate on the local alias to allow inlining.
 		       */
 		      if (!symtab_can_be_discarded ((symtab_node) n2))
-			n2 = cgraph (symtab_nonoverwritable_alias ((symtab_node)n2));
+			{
+			  cgraph_node *alias;
+			  alias = cgraph (symtab_nonoverwritable_alias
+					   ((symtab_node)n2));
+			  if (alias)
+			    n2 = alias;
+			}
 		      nconverted++;
 		      cgraph_turn_edge_to_speculative
 			(e, n2,

gcc/ipa.c

@@ -998,7 +998,7 @@ function_and_variable_visibility (bool whole_program)
 	{
 	  struct cgraph_node *alias = cgraph (symtab_nonoverwritable_alias ((symtab_node) node));
 
-	  if (alias != node)
+	  if (alias && alias != node)
 	    {
 	      while (node->callers)
 		{