re PR middle-end/50638 (emulated TLS fails)

        PR middle-end/50638
        * tree-emutls.c (gen_emutls_addr): Call add_referenced_var.

From-SVN: r179745

gcc/ChangeLog

+2011-10-10  Michael Matz  <matz@suse.de>
+
+	PR middle-end/50638
+	* tree-emutls.c (gen_emutls_addr): Call add_referenced_var.
+
 2011-10-10  Richard Sandiford  <richard.sandiford@linaro.org>
 
 	* modulo-sched.c (ps_reg_move_info): Add num_consecutive_stages.

gcc/tree-emutls.c

@@ -434,6 +434,7 @@ gen_emutls_addr (tree decl, struct lower_emutls_data *d)
       addr = create_tmp_var (build_pointer_type (TREE_TYPE (decl)), NULL);
       x = gimple_build_call (d->builtin_decl, 1, build_fold_addr_expr (cdecl));
       gimple_set_location (x, d->loc);
+      add_referenced_var (cdecl);
 
       addr = make_ssa_name (addr, x);
       gimple_call_set_lhs (x, addr);