With bug 1378186 we can compile methods that contain |super.prop|, but the approach is fairly naive just using the CacheIR code. - Look into supporting jsop_superbase outside of methods, i.e nested arrow functions or some such. - Use TI or other optimizations that we have for a normal GETPROP with super getprops. - i.e at least using basline IC feedback should be easy? - Elide barriers like we do for getprop when creating a MGetPropSuperCache instruction - Create typed variant (like LGetPropertyCacheT) It would be nice to have at the end of this if we could inline through calls to super methods.