re PR target/51244 ([SH] Inefficient conditional branch and code around T bit)

re PR target/51244 ([SH] Inefficient conditional branch and code around T bit)

	PR target/51244
	* config/sh/sh.md: Add splits for inverted compare and branch
	opportunities.
	(*cmpeqsi_t): New insn.
	(cmpgtsi_t, cmpgesi_t): Swap r and N alternatives.
	(cmpgeusi_t): Use satisfies_constraint_Z.  Emit sett insn in
	replacement insn list and not in the preparation statements.
	(clrt, sett): Add mt_group attribute.

	PR target/51244
	* gcc.target/sh/pr51244-7.c: New.
	* gcc.target/sh/pr51244-8.c: New.
	* gcc.target/sh/pr51244-9.c: New.
	* gcc.target/sh/pr51244-10.c: New.

From-SVN: r190331