* opts.c (finish_options): Do not fail for -fgnu-tm.
        * gimple-streamer-out.c (output_gimple_stmt): Handle GIMPLE_TRANSACTION.
        * gimple-streamer-in.c (input_gimple_stmt): Same.
        * lto-cgraph.c (input_overwrite_node): Read tm_clone bit.
        (lto_output_node): Write tm_clone bit.
lto/
        * lto-lang.c (lto_attribute_table): Handle transaction_pure.
        (handle_transaction_pure_attribute): New.

From-SVN: r181629