re PR debug/81993 (-gsplit-dwarf removes some symbols, causing some undefined references)

2017-08-28  Richard Biener  <rguenther@suse.de>

	PR debug/81993
	* dwarf2out.c (gen_remaining_tmpl_value_param_die_attributes):
	Do nothing for removed DIEs.

From-SVN: r251382

gcc/ChangeLog

 2017-08-28  Richard Biener  <rguenther@suse.de>
 
+	PR debug/81993
+	* dwarf2out.c (gen_remaining_tmpl_value_param_die_attributes):
+	Do nothing for removed DIEs.
+
+2017-08-28  Richard Biener  <rguenther@suse.de>
+
 	PR tree-optimization/81977
 	* tree-ssa-sccvn.c (vn_reference_lookup_3): Fix look through
 	memcpy.

gcc/dwarf2out.c

@@ -26037,7 +26037,8 @@ gen_remaining_tmpl_value_param_die_attribute (void)
       j = 0;
       FOR_EACH_VEC_ELT (*tmpl_value_parm_die_table, i, e)
 	{
-	  if (!tree_add_const_value_attribute (e->die, e->arg))
+	  if (!e->die->removed
+	      && !tree_add_const_value_attribute (e->die, e->arg))
 	    {
 	      dw_loc_descr_ref loc = NULL;
 	      if (! early_dwarf