Would BigInt need additional compiler support to be able to be initialized with a pointer to immortal data in const section? Or StaticBigInt provides enough compiler/runtime support to implement BigInt in pure Swift code?
Is StaticBigInt binary compatible with immortal array buffer of words that BigInt could use? Would construction of BigInt from StaticBigInt require heap allocation and deep copy?
BTW, do array literals already use immortal buffers?