90 lines
4.0 KiB
Markdown
90 lines
4.0 KiB
Markdown
|
# Phase 15.1 — Self-Hosting AOT-Plan to MIR13 (Nyash-first)
|
|||
|
|
|
|||
|
|
Scope: Extend Phase 15 (Self-Hosting Ny → MIR → VM/JIT) with a small, safe subphase that keeps VM/JIT primary, and prepares a future AOT pipeline by introducing:
|
|||
|
|
|
|||
|
|
- Nyash scripts that perform AOT preflight analysis across `using` trees
|
|||
|
|
- A stable AOT-Plan JSON schema (functions, externs, exports, type hints, link units)
|
|||
|
|
- A compiler-side importer that lowers AOT-Plan → MIR13 skeletons (no object code yet)
|
|||
|
|
|
|||
|
|
Avoid: deep AOT emission/linking, cross-platform toolchain work, or scope creep beyond planning and MIR13 import.
|
|||
|
|
|
|||
|
|
## Phase 15 Goals (context)
|
|||
|
|
|
|||
|
|
- VM-first correctness; JIT as compiler-only, not required for AOT deliverables
|
|||
|
|
- Minimal policy: read-only JIT-direct default, deny mut hostcalls unless whitelisted
|
|||
|
|
- Observability: compile/runtime JSONL events; counters for lower-time fallbacks
|
|||
|
|
- Short-circuit lowering and core collection ops kept consistent
|
|||
|
|
|
|||
|
|
## Phase 15.1 Objectives
|
|||
|
|
|
|||
|
|
- AOT-Plan via Nyash scripts (self-hosted analysis):
|
|||
|
|
- Parse sources with `using` resolution; build function inventory and extern references
|
|||
|
|
- Compute minimal “link unit” groups (per file or per module) pragmatically
|
|||
|
|
- Produce `aot_plan.v1.json`
|
|||
|
|
|
|||
|
|
- MIR13 importer:
|
|||
|
|
- Read AOT-Plan → create MIR13 functions with signatures and extern stubs
|
|||
|
|
- Leave bodies empty or minimal where applicable; execution stays VM/JIT
|
|||
|
|
|
|||
|
|
- Smokes:
|
|||
|
|
- `plan: using` on 2–3 small Nyash projects; output deterministic JSON
|
|||
|
|
- Import the plan and run via VM to confirm pipeline integrity (no AOT emit)
|
|||
|
|
|
|||
|
|
## Deliverables
|
|||
|
|
|
|||
|
|
- `tools/aot_plan/` Nyash scripts and helpers
|
|||
|
|
- `docs/specs/aot_plan_v1.md` (lightweight schema)
|
|||
|
|
- Compiler entry to import AOT-Plan → MIR13 (feature-gated)
|
|||
|
|
- 3 smokes + 1 golden JSON sample
|
|||
|
|
|
|||
|
|
## Out of Scope (Phase 15.1)
|
|||
|
|
|
|||
|
|
- Object emission, linkers, archive/rpath, platform toolchains
|
|||
|
|
- Non-trivial inliner/optimizer passes dedicated to AOT
|
|||
|
|
|
|||
|
|
## Milestones
|
|||
|
|
|
|||
|
|
1) AOT-Plan schema v1
|
|||
|
|
- Minimal fields: functions, externs, exports, units, types(optional)
|
|||
|
|
- Golden JSON example committed
|
|||
|
|
|
|||
|
|
2) Nyash analyzer (self-hosted)
|
|||
|
|
- Walk `using` graph; collect symbols and extern refs
|
|||
|
|
- Output `aot_plan.v1.json`
|
|||
|
|
|
|||
|
|
3) Importer to MIR13
|
|||
|
|
- Map functions → MIR13 signatures and extern call placeholders
|
|||
|
|
- Feature-gate import; maintain VM/JIT run with consistency
|
|||
|
|
|
|||
|
|
4) Smokes + Observability
|
|||
|
|
- 3 projects → stable plan JSON; importer round-trip builds MIR
|
|||
|
|
- Emit `jit::events` low-volume markers: `aot_plan.import`, `aot_plan.analyze`
|
|||
|
|
|
|||
|
|
## Risk & Guardrails
|
|||
|
|
|
|||
|
|
- Risk: scope creep to AOT emit → Guard: no obj/link in 15.1
|
|||
|
|
- Risk: importer expands semantics
|
|||
|
|
→ Guard: stub bodies only; effects mask conservative; VM reference behavior unchanged
|
|||
|
|
- Risk: plan schema churn → Guard: v1 frozen; add `extensions` map for future keys
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## Consultation Notes (Gemini / Claude)
|
|||
|
|
|
|||
|
|
Prompts used:
|
|||
|
|
- Gemini: "Phase 15 self-hosting goals (VM-first/JIT-compiler-only). Propose a 2-week 15.1 scope to add Nyash-driven AOT preflight that outputs a stable AOT plan JSON, plus a MIR13 importer—no object emission. Include milestones, acceptance criteria, and guardrails to prevent scope creep. Keep implementation incremental and observable."
|
|||
|
|
- Claude: "Given an existing Ny parser and using-resolution, design a minimal AOT planning pipeline as Ny scripts that produces a plan.json (functions/externs/exports/units). Define the MIR13 importer requirements and tests ensuring VM/JIT behavior remains canonical. Provide risks, do-not-do list, and minimal telemetry."
|
|||
|
|
|
|||
|
|
Key takeaways aligned into this document:
|
|||
|
|
- Keep 15.1 as a planning/import phase with strong do-not-do
|
|||
|
|
- Make plan JSON stable and small; let importer be skeletal
|
|||
|
|
- Add clear smokes and counters; avoid new runtime semantics
|
|||
|
|
|
|||
|
|
## Acceptance Criteria
|
|||
|
|
|
|||
|
|
- `tools/aot_plan` can analyze a small project with `using` and emit deterministic JSON
|
|||
|
|
- Importer can read that JSON and construct MIR13 module(s) without panics
|
|||
|
|
- VM runs those modules and matches expected string/number results for trivial bodies
|
|||
|
|
- Events present when enabled; counters reflect plan/import activity; no AOT emit performed
|
|||
|
|
|