As of Solidity 0.8.13, the Yul IR Pipeline, which can improve optimization markedly due to inter-function optimizations, is stated to be "Production Ready". However, the Solidity docs mention there are some potentially breaking changes in initialization semantics when enabling the "via-ir" optimization flag (see https://docs.soliditylang.org/en/v0.8.16/ir-breaking-changes.html).
Are the current OpenZeppelin smart contracts safe to compile via IR, or will this break some functionality? If they are safe, as of what version?
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We've run tests with viaIR in the past and they were successful. I just triggered another run to see (https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3683), and the tests failed but I believe it's due to a Hardhat issue.
In the list of semantic changes, nothing sounds like it would cause an issue for OZ Contracts.