Function LLVMIntrinsicGetType 

pub unsafe extern "C" fn LLVMIntrinsicGetType(
    Ctx: LLVMContextRef,
    ID: c_uint,
    ParamTypes: *mut LLVMTypeRef,
    ParamCount: usize,
) -> LLVMTypeRef

Retrieves the type of an intrinsic. For overloaded intrinsics, parameter types must be provided to uniquely identify an overload.

@see llvm::Intrinsic::getType()