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+# stage 48: landing the leftovers
+
+done: packed struct fields, growable arrays of sized integers and f32, f32 in extern and cfunc signatures, page-indexed invalidation with counted coverage, per-slot install invalidation, per-block llvm resource trackers freed when no compiled code is running, a direct-mapped function cache and a short call path for llvm o3 calls (fib bench 0.69 s to 0.53 s), and a faster self-modification path (bench/selfmod.zc about 7x on the jit).
+
+not done: structs by value in native calls, an inline llvm-to-llvm call, loop-invariant motion and cross-block cse in the core's optimizer, automatic tiering. the address of a packed element is declined on purpose.
+
+the stale test langerrors/pk_dyn.zc (which expected growable []sized to be rejected) was removed.