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refactor(control_flow): Phase 134 P0 - Normalization entry point SSOT
Consolidate dual entry points into unified NormalizationPlan system:
Problem:
- Dual entry points: try_normalized_shadow() + suffix_router_box
- ~220 lines of duplicated pattern detection logic
- Maintenance burden: changes required in two places
Solution:
- New normalization module with Box-First architecture
- NormalizationPlanBox: Single source of truth for pattern detection
- NormalizationExecuteBox: Single source of truth for execution
Implementation:
- src/mir/builder/control_flow/normalization/ (new module)
- README.md: Design contract (SSOT)
- plan.rs: NormalizationPlan data structure
- plan_box.rs: Pattern detection (7 unit tests)
- execute_box.rs: Execution logic
- mod.rs: Module integration
Refactored files:
- routing.rs::try_normalized_shadow(): 165 → 87 lines (-78 lines)
- suffix_router_box::try_lower_loop_suffix(): 258 → 116 lines (-142 lines)
Pattern support maintained:
- Phase 131: loop(true) only (consumed: 1)
- Phase 132: loop + single post (consumed: 3)
- Phase 133: loop + multiple post (consumed: 2+N)
Box-First principles:
- Plan Box: Detection responsibility only
- Execute Box: Execution responsibility only
- README.md: Contract documentation (SSOT)
- Clear separation enables independent testing
Test results:
- cargo test --lib: 1186 PASS (10 new tests added)
- Phase 133 VM/LLVM EXE: PASS (exit code 6)
- Phase 132 LLVM EXE: PASS (exit code 3)
- Phase 131 LLVM EXE: PASS (exit code 1)
Benefits:
- Code duplication eliminated (~220 lines)
- Single source of truth for normalization decisions
- Improved maintainability and testability
- Future-proof extensibility (easy to add new patterns)
Default behavior unchanged: Dev-only guard maintained
Related: Phase 134 normalization infrastructure improvement
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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2025-12-18 22:29:29 +09:00 |
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