tree-optimization/114471 - ICE with mismatching vector types

tree-optimization/114471 - ICE with mismatching vector types

The following fixes too lax verification of vector type compatibility
in vectorizable_operation.  When we only have a single vector size then
comparing the number of elements is enough but with SLP we mix those
and thus for operations like BIT_AND_EXPR we need to verify compatible
element types as well.  Allow sign changes for ABSU_EXPR though.

	PR tree-optimization/114471
	* tree-vect-stmts.cc (vectorizable_operation): Verify operand
	types are compatible with the result type.

	* gcc.dg/vect/pr114471.c: New testcase.