vect: Fix an ICE in vectorizable_simd_clone_call

vect: Fix an ICE in vectorizable_simd_clone_call

In vectorizable_simd_clone_call, type compatibility is handled based on
the number of elements and the type compatibility of elements, which is
not enough. This patch add VIEW_CONVERT_EXPRs if the arguments types
and return type of simd clone function are distinct with the vectype of
stmt.

2020-07-20  Yang Yang  <yangyang305@huawei.com>

gcc/ChangeLog:

	* tree-vect-stmts.c (vectorizable_simd_clone_call): Add
	VIEW_CONVERT_EXPRs if the arguments types and return type
	of simd clone function are distinct with the vectype of stmt.

gcc/testsuite/ChangeLog:

	* gcc.target/aarch64/sve/pr96195.c: New test.