TO_RESTART

The entry point to which to jump when restarting an unoptimized A_Continuation via P_RestartContinuation or P_RestartContinuationWithArguments. We skip the L2_TRY_OPTIONAL_PRIMITIVE, but still do the L2_DECREMENT_COUNTER_AND_REOPTIMIZE_ON_ZERO so that looped functions tend to get optimized.

Note that we could just as easily start at 0, the entry point for calling an unoptimized function, but we can skip the primitive safely because primitives and labels are mutually exclusive.

It's hard-coded, but checked against the default chunk in createDefaultChunk when that chunk is created.