CVE-2024-45056: Incorrect Calculation

zksolc is a Solidity compiler for ZKsync. All LLVM versions since 2015 fold xor shl 1, x, -1 to rotl 1, x if run with optimizations enabled. Here 1 is generated as an unsigned 64 bits number 2^64-1. This number is zero-extended to 256 bits on EraVM target while it should have been sign-extended...