Problem: - Pattern3 heuristic was too conservative: detect_if_in_body() returned true for ANY if statement, causing simple conditional assignments to be misclassified as Pattern3IfPhi - Example: `if i == 0 then seg = "first" else seg = "other"` was routed to Pattern3, but Pattern3 only handles if-sum patterns like `sum = sum + (if x then 1 else 0)` - This caused loops with conditional assignment to fail Pattern3 check and exhaust all routing paths Solution (Conservative, Phase 264 P0): - ast_feature_extractor.rs: - detect_if_else_phi_in_body(): Always return false - has_if = has_if_else_phi (don't use detect_if_in_body()) - loop_pattern_detection/mod.rs: - Add has_if_sum_signature() (returns false for P0) - has_if_else_phi = carrier_count > 1 && has_if_sum_signature(scope) Effect: - Simple conditional assignment loops now fall through to Pattern1 ✅ - Pattern3 misrouting prevented ✅ Results: - Lib tests: 1368/1368 PASS (no regression) - Minimal repro: phase264_p0_bundle_resolver_loop_min.hako PASS ✅ - Quick smoke: 45/46 (unchanged - complex BundleResolver loop needs P1) Phase 264 P1 TODO: - Implement accurate if-sum signature detection (AST/CFG analysis) - Support complex nested loops in Pattern2 or new pattern 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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 139(DONE): post-if
post_kの return lowering をReturnValueLowererBoxに統一(出口 SSOT 完成) - Phase 140(DONE):
NormalizedExprLowererBox初版(pure expression のみ) - Phase 141 P0(DONE): impure 拡張点(contract)を SSOT 化(Call/MethodCall はまだ out-of-scope)
- Phase 141 P1(DONE): “既知 intrinsic だけ” を許可して段階投入(length0)
- Phase 141 P1.5(DONE): 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 P0(DONE): 正規化単位を statement(loop 1個)へ寄せる(パターン爆発を止める)
- Phase 142-loopstmt P1(DONE): LLVM EXE smoke(同 fixture)を追加
- Phase 143-loopvocab(planned): StepTree の語彙拡張(loop 内 if/break/continue を「語彙追加」で吸収)
- Phase 91–92: Selfhost depth‑2 coverage(P5b escape recognition → lowering)
- Phase 94–100: P5b escape E2E / Trim policy / pinned + accumulator(VM/LLVM EXE parity)
- Phase 102: real-app read_quoted loop regression(VM + LLVM EXE)
- Phase 103: if-only regression baseline(VM + LLVM EXE / plan)
- Phase 113: if-only partial assign parity(片側代入の保持 merge)
- Phase 107–109: real-app depth-scan / policy router SSOT / error hint SSOT
- Phase 110–112: 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
- 現在の Phase を知りたい → ../10-Now.md
- 該当 Phase を詳しく知りたい → フォルダを開く
- 設計背景を知りたい → ../design/
- 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