Check ifunc_resolver only on FUNCTION_DECL

Since ifunc_resolver is only valid on FUNCTION_DECL, check ifunc_resolver
only on FUNCTION_DECL.

	PR target/85900
	PR target/85345
	* varasm.c (assemble_alias): Check ifunc_resolver only on
	FUNCTION_DECL.

From-SVN: r260683

gcc/ChangeLog

+2018-05-24  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/85900
+	PR target/85345
+	* varasm.c (assemble_alias): Check ifunc_resolver only on
+	FUNCTION_DECL.
+
 2018-05-24  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/85903

gcc/varasm.c

@@ -5917,7 +5917,8 @@ assemble_alias (tree decl, tree target)
 # else
       if (!DECL_WEAK (decl))
 	{
-	  if (cgraph_node::get (decl)->ifunc_resolver)
+	  if (TREE_CODE (decl) == FUNCTION_DECL
+	      && cgraph_node::get (decl)->ifunc_resolver)
 	    error_at (DECL_SOURCE_LOCATION (decl),
 		      "ifunc is not supported in this configuration");
 	  else