CPU designers know that some features are risky. Much like how web apps may often have "feature flags" that can be flipped on and off by operators in case a fea

CPU designers know that some features are risky. Much like how web apps may often have "feature flags" that can be flipped on and off by operators in case a feature goes wrong, CPUs have "chicken bits" that control various performance enhancing tricks and exotic instructions. By flipping that bit you disable the optimization.