* `override`. For external use by other interpreter definitions to override the current
instruction definition.
* `pure`. This instruction has no side effects.
-* 'tierN'. This instruction is only used by the tier N interpreter.
+* `tierN`. This instruction is only used by the tier N interpreter.
+* `specializing`. A prefix for an instructions related to adaptive interpreter.
+* `replaced`. This instruction will be replaced in the final bytecode by its directed
+ version (either forward or backward).
+* `register`. Currently does nothing.
+* `replicate(N)`. Replicate the instruction N times to store the oparg "inside" the instruction.
+* `no_save_ip`. This instruction does not affect the instruction pointer.
### Special functions/macros