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hakorune/docs/development/current/main/phases
tomoaki f07c2e7874 feat(mir): Phase 279 P0 - Type propagation pipeline SSOT unification
Eliminate "2本のコンパイラ" problem by unifying type propagation into single SSOT entry.

SSOT implementation:
- src/mir/type_propagation/pipeline.rs - SSOT type propagation pipeline
- TypePropagationPipeline::run() - Single entry point for all routes

Pipeline steps (fixed order):
1. Copy propagation (initial)
2. BinOp re-propagation (numeric promotion: Int+Float→Float)
3. Copy propagation (propagate promoted types)
4. PHI type inference (private step - cannot bypass)

Callers (both routes now use SSOT):
- lifecycle.rs::finalize_module() - Builder lifecycle route
- joinir_function_converter.rs::propagate_types() - JoinIR bridge route

Fail-fast guard (structural guarantee):
- PHI type inference is private step inside TypePropagationPipeline
- lifecycle.rs and joinir_function_converter.rs cannot call PhiTypeResolver directly
- Only public API: TypePropagationPipeline::run()
- Order drift is structurally impossible (private encapsulation)

Code reduction:
- ~500 lines of duplicate BinOp re-propagation logic removed
- 2 implementations consolidated into 1 SSOT

Files changed:
- New: src/mir/type_propagation/mod.rs
- New: src/mir/type_propagation/pipeline.rs (~300 lines)
- Modified: src/mir/mod.rs
- Modified: src/mir/builder/lifecycle.rs (~400 lines removed)
- Modified: src/mir/join_ir_vm_bridge/joinir_function_converter.rs (~100 lines removed)

Regression testing:
 Lifecycle route (VM backend): Phase 275 fixture
 JoinIR route (VM backend): loop_min_while.hako
 LLVM harness: Phase 275 fixture

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
2025-12-22 15:34:03 +09:00
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Phase ドキュメント

このフォルダは、実装フェーズPhase 131, Phase 33 等)ごとの詳細記録を保管します。

現在の Phase

  • Phase 139DONE: post-if post_k の return lowering を ReturnValueLowererBox に統一(出口 SSOT 完成)
  • Phase 140DONE: NormalizedExprLowererBox 初版pure expression のみ)
  • Phase 141 P0DONE: impure 拡張点contractを SSOT 化Call/MethodCall はまだ out-of-scope
  • Phase 141 P1DONE: “既知 intrinsic だけ” を許可して段階投入length0
  • Phase 141 P1.5DONE: known intrinsic registry + available_inputs 3-source merge + diagnostics
  • Phase 141 P2+planned: Call/MethodCall 対応effects + typing の段階投入)
  • Phase 142-loopstmt P0DONE: 正規化単位を statementloop 1個へ寄せるパターン爆発を止める
  • Phase 142-loopstmt P1DONE: LLVM EXE smoke同 fixtureを追加
  • Phase 143-loopvocabplanned: StepTree の語彙拡張loop 内 if/break/continue を「語彙追加」で吸収)
  • Phase 9192: Selfhost depth2 coverageP5b escape recognition → lowering
  • Phase 94100: P5b escape E2E / Trim policy / pinned + accumulatorVM/LLVM EXE parity
  • Phase 102: real-app read_quoted loop regressionVM + LLVM EXE
  • Phase 103: if-only regression baselineVM + LLVM EXE / plan
  • Phase 113: if-only partial assign parity片側代入の保持 merge
  • Phase 107109: real-app depth-scan / policy router SSOT / error hint SSOT
  • Phase 110112: ControlTree / StepTree構造SSOT, dev-only※設計SSOTは ../design/control-tree.md

Phase フォルダ構成(推奨)

phases/phase-131/
├── README.md                          (Phase 全体概要)
├── 131-03-llvm-lowering-inventory.md (LLVM 部分のテスト・検証)
├── 131-11-case-c-summary.md          (Case C 実装サマリー)
└── phase131-11-case-c-root-cause-analysis.md (根本原因分析)

参照方法

  1. 現在の Phase を知りたい../10-Now.md
  2. 該当 Phase を詳しく知りたい → フォルダを開く
  3. 設計背景を知りたい../design/
  4. 調査ログを見たい../investigations/

Phase 命名規則

  • ファイル名: phase-<N>-<title>/ (例: phase-131/)
  • 文書名: <N>-<NN>-<topic>.md (例: 131-11-case-c-summary.md)
    • Phase 番号で自然にソート可能
    • 同一 Phase 内で段階的に追跡可能

作成ルールSSOT

詳しくは ../DOCS_LAYOUT.md を参照。

  • 置き場所: phases/phase-<N>/ 配下のみ
  • 内容: Phase の実装記録・進捗・チェックリスト・検証結果
  • 避けるべき: 複数 Phase で参照される設計・アーキテクチャ(→ design/ へ)

最終更新: 2025-12-19