* caller-save.c (reg_save_code, reg_restore_code):  Index by mode, not
	NREGS.
	(insert_save, insert_restore): New parameter save_mode.
	(init_caller_save): Update initialization of reg_save_code
	and reg_restore_code.
	(save_call_clobbered_regs):  Compute save_modes and update calls to
	reg_save_code and reg_restore_code.
	(insert_restore):  Unsignetize numbers; use save_modes to choose mode
	of spill; update use of reg_restore_code.
	(insert_save):  Likewise.
	* i386.h (HARD_REGNO_CALLER_SAVE_MODE): Update.
	* c4x.h (HARD_REGNO_CALLER_SAVE_MODE): Update.
	* regs.h (HARD_REGNO_CALLER_SAVE_MODE): Likewise.

From-SVN: r40120