* decl.c (check_tag_decl): Handle RID_THREAD.
        (obscure_complex_init): Reject run-time init of tls.
        (grokvardecl, grokdeclarator): Handle RID_THREAD.
        * lex.c (reswords): Add __thread.
        (rid_to_yy): Map RID_THREAD to SCSPEC.

        * g++.dg/dg.exp: Prune the tls subdirectory.
        * g++.dg/tls/tls.exp, g++.dg/tls/trivial.C: New.
        * g++.dg/tls/diag-1.C, g++.dg/tls/diag-2.C: New.
        * g++.dg/tls/init-1.C: New.

From-SVN: r53754