RISC-V: Add RVV all mask C/C++ intrinsics support

RISC-V: Add RVV all mask C/C++ intrinsics support

gcc/ChangeLog:

	* config/riscv/riscv-vector-builtins-bases.cc (class mask_logic): New
	class.
	(class mask_nlogic): Ditto.
	(class mask_notlogic): Ditto.
	(class vmmv): Ditto.
	(class vmclr): Ditto.
	(class vmset): Ditto.
	(class vmnot): Ditto.
	(class vcpop): Ditto.
	(class vfirst): Ditto.
	(class mask_misc): Ditto.
	(class viota): Ditto.
	(class vid): Ditto.
	(BASE): Ditto.
	* config/riscv/riscv-vector-builtins-bases.h: Ditto.
	* config/riscv/riscv-vector-builtins-functions.def (vmand): Ditto.
	(vmnand): Ditto.
	(vmandn): Ditto.
	(vmxor): Ditto.
	(vmor): Ditto.
	(vmnor): Ditto.
	(vmorn): Ditto.
	(vmxnor): Ditto.
	(vmmv): Ditto.
	(vmclr): Ditto.
	(vmset): Ditto.
	(vmnot): Ditto.
	(vcpop): Ditto.
	(vfirst): Ditto.
	(vmsbf): Ditto.
	(vmsif): Ditto.
	(vmsof): Ditto.
	(viota): Ditto.
	(vid): Ditto.
	* config/riscv/riscv-vector-builtins-shapes.cc (struct alu_def): Ditto.
	(struct mask_alu_def): Ditto.
	(SHAPE): Ditto.
	* config/riscv/riscv-vector-builtins-shapes.h: Ditto.
	* config/riscv/riscv-vector-builtins.cc: Ditto.
	* config/riscv/riscv-vsetvl.cc (pass_vsetvl::cleanup_insns): Fix bug
	for dest it scalar RVV intrinsics.
	* config/riscv/vector-iterators.md (sof): New iterator.
	* config/riscv/vector.md (@pred_<optab>n<mode>): New pattern.
	(@pred_<optab>not<mode>): New pattern.
	(@pred_popcount<VB:mode><P:mode>): New pattern.
	(@pred_ffs<VB:mode><P:mode>): New pattern.
	(@pred_<misc_op><mode>): New pattern.
	(@pred_iota<mode>): New pattern.
	(@pred_series<mode>): New pattern.