re PR target/63171 (Segfault in rs6000.c:rs6000_emit_move for multiple tls tests…

re PR target/63171 (Segfault in rs6000.c:rs6000_emit_move for multiple tls tests starting with r214658)

gcc/
	PR middle-end/63171
	* rtlanal.c (tls_referenced_p): Don't skip constant subrtxes.

From-SVN: r214989

gcc/ChangeLog

+2014-09-06  Richard Sandiford  <rdsandiford@googlemail.com>
+
+	PR middle-end/63171
+	* rtlanal.c (tls_referenced_p): Don't skip constant subrtxes.
+
 2014-09-06  Tom de Vries  <tom@codesourcery.com>
 
 	* ira-costs.c (ira_tune_allocno_costs): Don't conditionalize

gcc/rtlanal.c

@@ -6072,7 +6072,7 @@ tls_referenced_p (const_rtx x)
     return false;
 
   subrtx_iterator::array_type array;
-  FOR_EACH_SUBRTX (iter, array, x, NONCONST)
+  FOR_EACH_SUBRTX (iter, array, x, ALL)
     if (GET_CODE (*iter) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (*iter) != 0)
       return true;
   return false;