RISC-V: Add testcases for VSETVL PASS 2

RISC-V: Add testcases for VSETVL PASS 2

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-1.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-10.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-11.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-12.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-13.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-14.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-15.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-16.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-17.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-18.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-19.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-2.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-20.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-21.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-22.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-23.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-24.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-25.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-26.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-27.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-28.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-3.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-4.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-5.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-6.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-7.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-8.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_phi-9.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-1.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-10.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-11.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-12.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-13.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-14.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-15.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-16.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-2.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-3.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-4.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-5.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-6.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-7.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-8.c: New test.
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-9.c: New test.