7dfd6ff1d9
## Phase 131-11-H: ループキャリアPHI型修正 - PHI生成時に初期値（entry block）の型のみ使用 - backedge の値を型推論に使わない（循環依存回避） - NYASH_CARRIER_PHI_DEBUG=1 でトレース ## Phase 131-12-P0: def_blocks 登録 & STRICT エラー化 - safe_vmap_write() で PHI 上書き保護 - resolver miss を STRICT でエラー化（フォールバック 0 禁止） - def_blocks 自動登録 ## Phase 131-12-P1: vmap_cur スナップショット実装 - DeferredTerminator 構造体（block, term_ops, vmap_snapshot） - Pass A で vmap_cur をスナップショット - Pass C でスナップショット復元（try-finally） - STRICT モード assert ## 結果 - ✅ MIR PHI型: Integer（正しい） - ✅ VM: Result: 3 - ✅ vmap snapshot 機構: 動作確認 - ⚠️ LLVM: Result: 0（別のバグ、次Phase で調査） 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
49 lines
1.8 KiB
Markdown
49 lines
1.8 KiB
Markdown
# Investigations Folder
|
|
|
|
This folder contains investigation notes and analysis for debugging sessions.
|
|
|
|
## Active Investigations
|
|
|
|
### Phase 131-12: LLVM Wrong Result (Case C)
|
|
|
|
**Status**: ✅ Root cause identified
|
|
**Problem**: LLVM backend returns wrong results for loop exit values
|
|
**Root Cause**: vmap object identity mismatch between Pass A and Pass C
|
|
|
|
**Key Documents**:
|
|
1. [phase131-12-case-c-llvm-wrong-result.md](phase131-12-case-c-llvm-wrong-result.md) - Initial investigation scope
|
|
2. [phase131-12-p1-vmap-identity-analysis.md](phase131-12-p1-vmap-identity-analysis.md) - Detailed trace analysis
|
|
3. [phase131-12-p1-trace-summary.md](phase131-12-p1-trace-summary.md) - Executive summary with fix recommendations
|
|
|
|
**Quick Summary**:
|
|
- **Bug**: Pass A deletes `_current_vmap` before Pass C runs
|
|
- **Impact**: Terminators use wrong vmap object, missing all Pass A writes
|
|
- **Fix**: Store vmap_cur in deferred_terminators tuple (Option 3)
|
|
|
|
**Next Steps**:
|
|
1. Implement Option 3 fix in block_lower.py
|
|
2. Add Fail-Fast check in instruction_lower.py
|
|
3. Verify with NYASH_LLVM_VMAP_TRACE=1
|
|
4. Run full test suite
|
|
|
|
## Trace Environment Variables
|
|
|
|
### Phase 131-12-P1 Traces
|
|
```bash
|
|
NYASH_LLVM_VMAP_TRACE=1 # Object identity and vmap keys tracing
|
|
NYASH_LLVM_USE_HARNESS=1 # Enable llvmlite harness
|
|
NYASH_LLVM_DUMP_IR=<path> # Save LLVM IR to file
|
|
```
|
|
|
|
## Investigation Workflow
|
|
|
|
1. **Scope** - Define problem and test case (phase131-12-case-c-*.md)
|
|
2. **Trace** - Add instrumentation and collect data (phase131-12-p1-vmap-identity-*.md)
|
|
3. **Analysis** - Identify root cause with evidence (phase131-12-p1-trace-summary.md)
|
|
4. **Fix** - Implement solution with validation
|
|
5. **Document** - Update investigation notes with results
|
|
|
|
## Archive
|
|
|
|
Completed investigations are kept for reference and pattern recognition.
|