2011-08-11  Sergey Grechanik  <mouseentity@ispras.ru>

	* sel-sched-ir.h (register_unavailable_p): Declare.
	* sel-sched-ir.c (register_unavailable_p): New.  Use it...
	(set_unavailable_target_for_expr): ... here to properly test
	availability of a register.
	(speculate_expr): Ditto.
	* sel-sched.c (substitute_reg_in_expr): Ditto.
	(av_set_could_be_blocked_by_bookkeeping_p): Ditto.

From-SVN: r177654