re PR target/54963 (Wrong code generated for libgfortran/generated/eoshift3_8.c on SH)

re PR target/54963 (Wrong code generated for libgfortran/generated/eoshift3_8.c on SH)

	PR target/54963
	* config/sh/iterators.md (SIDI): New mode iterator.
	* config/sh/sh.md (negdi2): Use parallel around operation and T_REG
	clobber in expander.
	(*negdi2): Mark output operand as early clobbered.  Add T_REG clobber.
	Split after reload.  Simplify split code.
	(abssi2, absdi2): Fold expanders into abs<mode>2.
	(*abssi2, *absdi2): Fold into *abs<mode>2 insn_and_split.  Split insns
	before reload.
	(*negabssi2, *negabsdi2): Fold into *negabs<mode>2.  Add T_REG clobber.
	Split insns before reload.
	(negsi_cond): Reformat.  Use emit_move_insn instead of
	gen_movesi.
	(negdi_cond): Reformat.  Use emit_move_insn instead of a pair
	of gen_movsi.  Split insn before reload.

From-SVN: r192983