Taking a quick look at the JSC code, the main difference is that CacheIR is more pervasive and load-bearing. Even monomorphic cases go through CacheIR. The mai

Taking a quick look at the JSC code, the main difference is that CacheIR is more pervasive and load-bearing. Even monomorphic cases go through CacheIR. The main justification for CacheIR isn't that it enables us to do optimizations that can't be done in other ways. It's just a convenient unifying framework.