PR target/35574
	* config/sparc/constraints.md (D): New.
	* config/sparc/predicates.md (const_double_or_vector_operand):
	New.
	* config/sparc/sparc.c (sparc_extra_constraint_check): Handle the
	'D' constraint.
	* config/sparc/sparc.md (*movdf_insn_sp32_v9, *movdf_insn_sp64):
	Use the 'D' constraint in addition to 'F' in some alternatives.
	(DF splitter): Generalize for V64mode.
	* doc/md.texi (SPARC): Document the 'D' constraint.

From-SVN: r141644