ipa-visibility.c (varpool_node::externally_visible_p): Do not privatize dynamic TLS variables.

	* ipa-visibility.c (varpool_node::externally_visible_p): Do not
	privatize dynamic TLS variables.

From-SVN: r215417

gcc/ChangeLog

 2014-09-19  Jan Hubicka  <hubicka@ucw.cz>
 
+	* ipa-visibility.c (varpool_node::externally_visible_p): Do not
+	privatize dynamic TLS variables.
+
+2014-09-19  Jan Hubicka  <hubicka@ucw.cz>
+
 	* diagnostic.c (warning_n): New function.
 	* diagnostic-core.h (warning_n): Declare.
 	* ipa-devirt.c (ipa_devirt): Handle singulars correctly;

gcc/ipa-visibility.c

@@ -277,6 +277,13 @@ varpool_node::externally_visible_p (void)
   if (used_from_object_file_p ())
     return true;
 
+  /* Bringing TLS variables local may cause dynamic linker failures
+     on limits of static TLS vars.  */
+  if (DECL_THREAD_LOCAL_P (decl)
+      && (DECL_TLS_MODEL (decl) != TLS_MODEL_EMULATED
+	  && DECL_TLS_MODEL (decl) != TLS_MODEL_INITIAL_EXEC))
+    return true;
+
   if (DECL_HARD_REGISTER (decl))
     return true;
   if (DECL_PRESERVE_P (decl))