commit 0a49042b9151e0387efc5f87c32cb24968896ae4
Author: Aldy Hernandez <aldyh@redhat.com>
Date:   Tue Mar 17 12:29:27 2015 -0700

    Equate new DIE containing a DW_AT_specification, to the original
    declaration.

diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index 86815be..c7345d9 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -18809,6 +18809,8 @@ gen_subprogram_die (tree decl, dw_die_ref context_die)
 		add_type_attribute (subr_die, TREE_TYPE (TREE_TYPE (decl)),
 				    TYPE_UNQUALIFIED, context_die);
 	    }
+	  if (early_dwarf_dumping)
+	    equate_decl_number_to_die (decl, subr_die);
 	}
     }
   /* Anything else... create a brand new DIE.  */