RISC-V: Add assert of the number of vmerge in autovec cond testcases

RISC-V: Add assert of the number of vmerge in autovec cond testcases

This patch adds more asserts about the vmerge insns which is intended
to ensure better performance for cond autovec.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/autovec/cond/cond_arith-1.c: Add vmerge assert.
	* gcc.target/riscv/rvv/autovec/cond/cond_arith-2.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_arith-3.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_arith-4.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_arith-5.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_arith-6.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_arith-7.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_arith-8.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv32-1.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv32-2.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv64-1.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv64-2.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_float2int-rv32-1.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_float2int-rv32-2.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_float2int-rv64-1.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_float2int-rv64-2.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_int2float-rv32-1.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_int2float-rv32-2.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_int2float-rv64-1.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_int2float-rv64-2.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_int2int-rv32-1.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_int2int-rv32-2.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_int2int-rv64-1.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_convert_int2int-rv64-2.c:
	Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_copysign-rv32gcv.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_copysign-rv64gcv.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fadd-1.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fadd-2.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fadd-3.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fadd-4.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fma_fnma-1.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fma_fnma-2.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fma_fnma-3.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fma_fnma-4.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fma_fnma-5.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fma_fnma-6.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fma_fnma-7.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fma_fnma-8.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fma_fnma_run-5.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fmax-1.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fmax-2.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fmax-3.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fmax-4.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fmin-1.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fmin-2.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fmin-3.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fmin-4.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fms_fnms-1.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fms_fnms-2.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fms_fnms-3.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fms_fnms-4.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fms_fnms-5.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fms_fnms-6.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fmul-1.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fmul-2.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fmul-3.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_fmul-4.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_logical_min_max-1.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_logical_min_max-2.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_logical_min_max-3.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_logical_min_max-4.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_logical_min_max-5.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_shift-1.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_shift-2.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_shift-3.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_shift-4.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_shift-5.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_shift-6.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_shift-7.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_shift-8.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_shift-9.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_sqrt-1.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_sqrt-2.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_unary-1.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_unary-2.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_unary-3.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_unary-4.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_unary-5.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_unary-6.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_unary-7.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_unary-8.c: Ditto.
	* gcc.target/riscv/rvv/autovec/cond/cond_arith-10.c: New test.
	* gcc.target/riscv/rvv/autovec/cond/cond_arith-11.c: New test.
	* gcc.target/riscv/rvv/autovec/cond/cond_arith_run-10.c: New test.
	* gcc.target/riscv/rvv/autovec/cond/cond_arith_run-11.c: New test.
	* gcc.target/riscv/rvv/autovec/cond/cond_fmul-5.c: New test.
	* gcc.target/riscv/rvv/autovec/cond/cond_fmul_run-5.c: New test.