re PR target/67391 ([SH] Convert clrt addc to normal add insn)

re PR target/67391 ([SH] Convert clrt addc to normal add insn)

gcc/
	PR target/67391
	* config/sh/sh-protos.h (sh_lra_p): Declare.
	* config/sh/sh.c (sh_lra_p): Make non-static.
	* config/sh/sh.md (addsi3): Use arith_reg_dest for operands[0] and
	arith_reg_operand for operands[1].  Remove TARGET_SHMEDIA case.
	Expand into addsi3_scr if operands[2] if needed.
	(*addsi3_compact): Rename to *addsi3_compact_lra.  Use
	arith_reg_operand for operands[1].  Allow it only when LRA is enabled.
	(addsi3_scr, *addsi3): New insn_and_split patterns.

Co-Authored-By: Kaz Kojima <kkojima@gcc.gnu.org>
From-SVN: r228176