PR target/54760
	* config/sh/sh.md (*mov<mode>_gbr_load, *mov<mode>_gbr_store): New
	insns and accompanying unnamed splits.
	* config/sh/predicates.md (general_movsrc_operand,
	general_movdst_operand): Reject GBR addresses.
	* config/sh/sh-protos.h (sh_find_equiv_gbr_addr): New declaration.
	* config/sh/sh.c (sh_address_cost, sh_legitimate_address_p,
	sh_secondary_reload): Handle GBR addresses.
	(base_reg_disp): New class.
	(sh_find_base_reg_disp, sh_find_equiv_gbr_addr): New functions.

	PR target/54760
	* gcc.target/sh/pr54760-2.c: New.
	* gcc.target/sh/pr54760-3.c: New.

From-SVN: r192193