simon/jolt
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
jolt/host/chez/seed
History
Yogthos d77b4e6420 Migrate clojure.core/set from a native shim to the kernel overlay tier 
set was a native shim (apply jolt-hash-set (seq->list coll)). It is a
pure composition, so the Clojure version (apply hash-set (seq coll))
lowers to the same code. The compiler uses set, but only off the emit
path (the backend's bare-native-names def and type inference), so it can
live in the kernel tier: compiling that tier never calls set, and by the
time those callers run the tier is already bound.

This is distinct from boolean, which the backend calls for every :if
node on the emit path. Moving boolean even to the kernel tier deadlocks
(compiling the tier that defines boolean needs boolean), so boolean stays
native. Added a comment in predicates.ss recording that.

Re-mint converges in 3 passes and the benchmark suite is unchanged
within noise (collections 43.3 vs 43.1, binary-trees 367 vs 367, the
rest flat).
2026-06-30 10:35:57 -04:00
..
image.ss Migrate clojure.core/set from a native shim to the kernel overlay tier 2026-06-30 10:35:57 -04:00
prelude.ss Migrate clojure.core/set from a native shim to the kernel overlay tier 2026-06-30 10:35:57 -04:00
README.md Docs: Chez-only, drop the Janet-era references and obsolete migration notes 2026-06-22 09:05:35 -04:00

README.md

Chez bootstrap seed

These two files are the bootstrap compiler for jolt — the seed that makes the build self-hosting:

  • prelude.ss — the clojure.core prelude (all tiers + clojure.string/walk/ template/edn/set/pprint) as Scheme def-var! forms.
  • image.ss — the compiler image (jolt.ir + jolt.analyzer + jolt.backend-scheme) as Scheme def-var! forms.

Both are generated, not hand-written. They are checked in because a fresh checkout must be able to build jolt-on-Chez using only Chez: host/chez/bootstrap.ss loads this seed, then rebuilds the prelude + image from the .clj/.ss sources via the on-Chez compiler (read → analyze → emit, all on Chez). The seed is a joint byte-fixpoint: rebuilding from an up-to-date seed reproduces it exactly. make selfhost (host/chez/selfcheck.sh) runs host/chez/bootstrap.ss and diffs the rebuilt artifacts against the checked-in seed.

Re-minting

When the seed sources change (the core tiers, the compiler namespaces, the host contract, the reader, emit-image.ss), the seed drifts and make selfhost fails. Re-mint it by running host/chez/bootstrap.ss and writing the freshly rebuilt prelude/image back to host/chez/seed/prelude.ss / host/chez/seed/image.ss, then commit the refreshed files.