The vect_get_smallest_scalar_type helper function was using any argument 
to a simd clone call when trying to determine the smallest scalar type 
that would be vectorized.  This included the function pointer type in a 
MASK_CALL for instance, and would result in the wrong type being 
selected.  Instead this patch special cases simd_clone_call's and uses 
only scalar types of the original function that get transformed into 
vector types.

gcc/ChangeLog:

	* tree-vect-data-refs.cci (vect_get_smallest_scalar_type): Special case
	simd clone calls and only use types that are mapped to vectors.
	* tree-vect-stmts.cc (simd_clone_call_p): New helper function.
	* tree-vectorizer.h (simd_clone_call_p): Declare new function.

gcc/testsuite/ChangeLog:

	* gcc.dg/vect/vect-simd-clone-16f.c: Remove unnecessary differentation
	between targets with different pointer sizes.
	* gcc.dg/vect/vect-simd-clone-17f.c: Likewise.
	* gcc.dg/vect/vect-simd-clone-18f.c: Likewise.