RISC-V: Add autovectorization tests for binary integer operations.

RISC-V: Add autovectorization tests for binary integer operations.

This patchs adds scan as well as execution tests for vectorized
binary integer operations.  The tests are not comprehensive as
the vector type promotions (vec_unpack, extend etc.) are not implemented
yet.  Also, vmulh, vmulhu, and vmulhsu and others are still missing.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/autovec/shift-rv32gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/shift-rv64gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/shift-template.h: New test.
	* gcc.target/riscv/rvv/autovec/shift-run.c: New test.
	* gcc.target/riscv/rvv/autovec/shift-scalar-rv32gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/shift-scalar-rv64gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/shift-scalar-template.h: New test.
	* gcc.target/riscv/rvv/autovec/shift-scalar-run.c: New test.
	* gcc.target/riscv/rvv/autovec/vadd-run-template.h: New test.
	* gcc.target/riscv/rvv/autovec/vadd-rv32gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vadd-rv64gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vadd-template.h: New test.
	* gcc.target/riscv/rvv/autovec/vand-run.c: New test.
	* gcc.target/riscv/rvv/autovec/vand-rv32gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vand-rv64gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vand-template.h: New test.
	* gcc.target/riscv/rvv/autovec/vdiv-run.c: New test.
	* gcc.target/riscv/rvv/autovec/vdiv-rv32gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vdiv-rv64gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vdiv-template.h: New test.
	* gcc.target/riscv/rvv/autovec/vmax-run.c: New test.
	* gcc.target/riscv/rvv/autovec/vmax-rv32gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vmax-rv64gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vmax-template.h: New test.
	* gcc.target/riscv/rvv/autovec/vmin-run.c: New test.
	* gcc.target/riscv/rvv/autovec/vmin-rv32gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vmin-rv64gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vmin-template.h: New test.
	* gcc.target/riscv/rvv/autovec/vmul-run.c: New test.
	* gcc.target/riscv/rvv/autovec/vmul-rv32gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vmul-rv64gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vmul-template.h: New test.
	* gcc.target/riscv/rvv/autovec/vor-run.c: New test.
	* gcc.target/riscv/rvv/autovec/vor-rv32gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vor-rv64gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vor-template.h: New test.
	* gcc.target/riscv/rvv/autovec/vrem-run.c: New test.
	* gcc.target/riscv/rvv/autovec/vrem-rv32gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vrem-rv64gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vrem-template.h: New test.
	* gcc.target/riscv/rvv/autovec/vsub-run.c: New test.
	* gcc.target/riscv/rvv/autovec/vsub-rv32gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vsub-rv64gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vsub-template.h: New test.
	* gcc.target/riscv/rvv/autovec/vxor-run.c: New test.
	* gcc.target/riscv/rvv/autovec/vxor-rv32gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vxor-rv64gcv.c: New test.
	* gcc.target/riscv/rvv/autovec/vxor-template.h: New test.

Co-authored-by: Michael Collison <collison@rivosinc.com>