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tomoaki 960241795d feat(mir/llvm): Phase 273 P0-P1 DomainPlan→CorePlan + LLVM arg fix 
Phase 273 P0-P1: Two-layer plan architecture
- DomainPlan: Pattern-specific knowledge (ScanWithInit)
- CorePlan: Fixed vocabulary (Seq, Loop, If, Effect, Exit)
- ValueId references only (String expressions forbidden)
- Pipeline: Extractor→Normalizer→Verifier→Lowerer

New plan/ module:
- mod.rs: Type definitions, SSOT spec
- normalizer.rs: DomainPlan→CorePlan + ID allocation
- verifier.rs: V1-V6 invariant checks (fail-fast)
- lowerer.rs: CorePlan→MIR (pattern-agnostic)

LLVM fix (ChatGPT):
- function_lower.py: Fix argument reference bug
- Phase 258 index_of_string now PASS on LLVM backend

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2025-12-22 22:42:56 +09:00

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Phase 273 P0: Plan Extractor (pure) + PlanLowerer SSOT — completion

Status: ✅ completed (2025-12-22)

Goal:

  • Pattern を “Plan抽出プラグイン” に降格し、CFG/PHI/block/value 生成の責務を PlanLowerer に集約して、裾広がりを止める。

What changed (P0):

  • Plan 語彙を最小導入（P0 は PoC として pattern-specific を 1 個だけ許容）
  • Extractor は pure（builder を触らない）
  • Lowerer が block/value/phi を作る唯一の場所
  • terminator SSOT（Frag → emit_frag()）は維持

PoC target:

  • Pattern6（scan with init）

Behavior / limits:

  • dynamic_needle=true は当時 Ok(None) で fallthrough（P1+）
  • step_lit != 1（reverse scan）も Ok(None) で fallthrough（P1+）

Regression:

  • tools/smokes/v2/profiles/integration/apps/phase254_p0_index_of_vm.sh PASS

Files:

  • src/mir/builder/control_flow/plan/mod.rs
  • src/mir/builder/control_flow/plan/lowerer.rs
  • src/mir/builder/control_flow/joinir/patterns/pattern6_scan_with_init.rs
  • src/mir/builder/control_flow/joinir/patterns/router.rs

Next (P1+):

  • Plan語彙を固定（Seq/Loop/If/Effect/Exit）へ畳み、pattern-specific Plan の増殖を止める。

Note (follow-up):

  • その後の修正で dynamic_needle（Phase 258 の string index_of 系）も PlanLowerer 側で handling され、JoinIR freeze 下でも fallthrough しない経路に寄せている（詳細は Phase 273 README を参照）。