Just flushing out some built-up cleanup patches from farther-out patches.
Created attachment 595235 [details] [diff] [review]
tidy up Stack
- undoes more of the changes from the old Stack/StackSpace split,
- removes resetCallFrame; it is dead (didn't I already do this?)
- kills these initJitFrame* functions since they don't actually describe what the prologue is doing anymore, merging two of them into initFixupFrame, since that is actually used (by getFixupFrame in FixupArity).
Created attachment 595236 [details] [diff] [review]
simplify Interpret args/local ops
Tiny patch, just uses formalArg (useful later when arg access is more dynamic) and adds localSlot for symmetry.