Creating ConstantInts of very large numbers

[vihanb]

I was recently implementing an algorithm that used a very large number 0xdf900294d8f554a5 in my language which compiles with llvm-node however I noticed an unusual issue is that JS cannot accurately represent such large numbers so the outputted LLVM contains an inaccurate number too. First thought was a .get() that takes a string and is parsed in C++ as a uint64 and then passed to LLVM could help solve this issue.

[MichaReiser]

Hi @vihanb

Unfortunately, v8 was not capable to represent arbitrary large uint64 numbers when I started implementing the library. And there is a chance that the library does not handle overflows correctly so far.

It might be worth it to take a look into BigInt that seems to be supported with Node 10. For older node versions it would at least be desirable to catch the cases where the number overflows.

[MichaReiser]

This issue is fixed by the PR #76 from @ovr

You can use the string overload to retrieve large numbers.