26 lines
1.3 KiB
Markdown
26 lines
1.3 KiB
Markdown
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# Code Map (Backend VM) — Quick Guide
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Purpose: Make it obvious where to look without reading everything.
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## Backend Modules (VM)
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- `src/backend/vm.rs`: Core VM struct, execute loop, storage, control-flow.
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- `src/backend/vm_instructions.rs`: Instruction handlers called from `execute_instruction`.
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- `src/backend/vm_values.rs`: Value-level ops (binary/unary/compare), boolean coercions.
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- `src/backend/vm_boxcall.rs`: Box method dispatch (`call_box_method_impl`), BoxCall debug logger。
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- `src/backend/vm_phi.rs`: Loop/phi utilities (LoopExecutor)。
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- `src/backend/vm_stats.rs`: Stats/diagnostics printing（JSON/Text, envで制御）。
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## MIR Pipeline (where to check next)
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- `src/mir/printer.rs`: `--mir-verbose(--effects)`の出力。
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- `src/mir/verification.rs`: SSA/支配/CFG/merge-phi + WeakRef/Barrier 最小検証＋Strict Barrier診断。
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- `src/mir/optimizer.rs`: DCE/CSE/順序調整 + 未lowering検知（is/as 系）。
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## Useful env flags
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- `NYASH_VM_DEBUG_BOXCALL=1`: BoxCallの受け手/引数/結果型をstderrに出力。
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- `NYASH_VM_STATS=1` (`NYASH_VM_STATS_JSON=1`): 実行統計を表示（JSON可）。
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- `NYASH_VERIFY_BARRIER_STRICT=1`: Barrierの軽い文脈診断を有効化。
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- `NYASH_OPT_DIAG_FAIL=1`: Optimizerの未lowering検知でエラー終了（CI向け）。
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Last updated: 2025-08-25
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