Keep long bigint literals in hexadecimal format

[KimlikDAO-bot]

Long bigint literals written in hexadecimal format (such as 0x123456789ABDEFn) should be kept as is. Currently GCC expands them to decimal bigint literals, which increases the compiled size significantly (up to ~20%).

Example:

const P = 0x2fadbe2852044d028597455bc2abbd1bc873af205dfabb8a304600f3e09eeba8n;
console.log(P);

is transformed to

console.log(21565680844461314807147611702860246336805372493508489110556896454939225549736n)

Many crypto libraries (hashing, verifiable computation, etc) include long list of large constants. Keeping such constants in hexadecimal form makes a big difference.

Writing the literals as BigInt("0xabc") is a workaround but is not ideal due to increased compiled size and runtime cost.

This incurs up to 20% blow up in compiled code size.