public HExpr EnsureIntrinsicProcedure(string name, int isIdempotent, BaseType dt, int arity)
{
var exp = host.EnsureIntrinsic(name, isIdempotent != 0, ntf.GetRekoType((HExpr)dt), arity);
var pc = new ProcedureConstant(PrimitiveType.Ptr32, exp);
return(m.MapToHandle(pc));
}