gcc/
	* doc/md.texi: Document the "unspec" and "unspecv" enum names.
	* Makefile.in (OBJS-common): Include insn-enums.o.
	(insn-enums.o): New rule.
	(simple_generated_c): Add insn-enums.c.
	(build/genenums.o): New rule.
	(genprogmd): Add "enums".
	* genconstants.c (print_enum_type): Declare a C string array
	for each enum.
	* genenums.c: New file.
	* print-rtl.c (print_rtx): If defined, use the "unspecv" enum
	for UNSPEC_VOLATILE.  If defined, use the "unspec" enum for both
	UNSPEC and (as a fallback) for UNSPEC_VOLATILE.

From-SVN: r160582