gcc/
	* hard-reg-set.h: Include hash-table.h.
	(target_hard_regs): Add a finalize method and a x_simplifiable_subregs
	field.
	* target-globals.c (target_globals::~target_globals): Call
	hard_regs->finalize.
	* rtl.h (subreg_shape): New structure.
	(shape_of_subreg): New function.
	(simplifiable_subregs): Declare.
	* reginfo.c (simplifiable_subreg): New structure.
	(simplifiable_subregs_hasher): Likewise.
	(simplifiable_subregs): New function.
	(invalid_mode_changes): Delete.
	(alid_mode_changes, valid_mode_changes_obstack): New variables.
	(record_subregs_of_mode): Remove subregs_of_mode parameter.
	Record valid mode changes in valid_mode_changes.
	(find_subregs_of_mode): Remove subregs_of_mode parameter.
	Update calls to record_subregs_of_mode.
	(init_subregs_of_mode): Remove invalid_mode_changes and bitmap
	handling.  Initialize new variables.  Update call to
	find_subregs_of_mode.
	(invalid_mode_change_p): Check new variables instead of
	invalid_mode_changes.
	(finish_subregs_of_mode): Finalize new variables instead of
	invalid_mode_changes.
	(target_hard_regs::finalize): New function.
	* ira-costs.c (print_allocno_costs): Call invalid_mode_change_p
	even when CLASS_CANNOT_CHANGE_MODE is undefined.

From-SVN: r215449