feat(joinir): Phase 27-shortterm S-4 完了 - JoinIR → Rust VM ブリッジ参考実装
## 実装内容
### S-4.1: VM インターフェース調査
- VMValue 定義調査（Integer/Float/Bool/String/Future/Void/BoxRef）
- execute_module() API 調査
### S-4.2: JoinValue ↔ VMValue 変換関数実装
- src/mir/join_ir_ops.rs に変換関数追加（+121行）
- to_vm_value()/from_vm_value() 実装
- Float/Future/BoxRef は非対応エラー
### S-4.3: join_ir_vm_bridge.rs 基本構造実装
- src/mir/join_ir_vm_bridge.rs 新規作成（362行）
- run_joinir_via_vm() API 実装
- convert_join_function_to_mir() 実装
- 7つのコンパイルエラー修正完了
### S-4.4-A: Call/Jump 命令実装（skip_ws パターンのみ）
- Call: 末尾呼び出しのみサポート
- Jump: Multi-block CFG 生成（Branch + Return）
- 非対応パターンは unimplemented!() で落とす
### S-4.4-B: A/B テスト作成
- src/tests/joinir_vm_bridge_skip_ws.rs 作成（104行）
- Route A: 直接 VM 実行
- Route C: JoinIR → VM bridge 経由
- skip_ws(" abc") → 3 の A/B 比較実装
## 戦略転換
ChatGPT 先生 + Task 先生の分析により、**Approach 2 (JoinIR Runner 本線化 + ガードレール)** への移行が決定。
本ブリッジ実装は参考実装として保持し、これ以上は太らせない方針。次フェーズで JoinIR Runner を method_router 経由で Rust VM と統合する。
This commit is contained in:
nyash-codex
@ -151,8 +151,9 @@ fn convert_joinir_to_mir(
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fn convert_join_function_to_mir(
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join_func: &crate::mir::join_ir::JoinFunction,
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) -> Result<MirFunction, JoinIrVmBridgeError> {
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// Phase 27-shortterm S-4.3 最小実装:
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// 1つの basic block に全命令を配置
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// Phase 27-shortterm S-4.4: skip_ws パターン対応版
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// - Call (tail call): MIR Call に変換
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// - Jump (conditional exit): Branch + Return に変換
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let entry_block = BasicBlockId(0);
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// Create minimal FunctionSignature for JoinIR function
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@ -170,44 +171,141 @@ fn convert_join_function_to_mir(
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let mut mir_func = MirFunction::new(signature, entry_block);
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let mut instructions = Vec::new();
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// Phase 27-shortterm S-4.4: Multi-block conversion for Jump instructions
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// Strategy:
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// - Accumulate Compute instructions in current block
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// - On Jump: emit Branch + create exit block with Return
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// - On Call: emit Call in current block
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let mut current_block_id = entry_block;
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let mut current_instructions = Vec::new();
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let mut next_block_id = 1u32; // for creating new blocks
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// JoinInst → MirInstruction 変換
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for join_inst in &join_func.body {
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match join_inst {
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JoinInst::Compute(mir_like) => {
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let mir_inst = convert_mir_like_inst(mir_like)?;
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instructions.push(mir_inst);
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current_instructions.push(mir_inst);
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}
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JoinInst::Call { func, args, dst, .. } => {
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// TODO: S-4.4 で関数呼び出し実装
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eprintln!(
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"[joinir_vm_bridge] WARNING: Call instruction not yet implemented (func={:?}, args={:?}, dst={:?})",
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func, args, dst
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);
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JoinInst::Call { func, args, dst, k_next } => {
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// Phase 27-shortterm S-4.4-A: skip_ws pattern only (tail calls)
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// Validate: dst=None, k_next=None (tail call)
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if dst.is_some() || k_next.is_some() {
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return Err(JoinIrVmBridgeError::new(format!(
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"Non-tail Call not supported (dst={:?}, k_next={:?}). Only skip_ws tail call pattern is supported.",
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dst, k_next
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)));
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}
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// Convert JoinFuncId to function name
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// For skip_ws: func=0 → "main", func=1 → "join_func_1"
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let func_name = if func.0 == 0 {
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"main".to_string()
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} else {
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format!("join_func_{}", func.0)
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};
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eprintln!("[joinir_vm_bridge] Converting Call to function '{}' with {} args", func_name, args.len());
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// Create a temporary ValueId to hold the function name (string constant)
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// This is a workaround for MIR's string-based Call resolution
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// In Phase 27-shortterm, we use a high ValueId to avoid conflicts
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let func_name_id = ValueId(9999);
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// Add Const instruction for function name
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current_instructions.push(MirInstruction::Const {
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dst: func_name_id,
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value: MirConstValue::String(func_name.clone()),
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});
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// Create Call instruction (legacy string-based)
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// Phase 27-shortterm: No Callee yet, use func field with string ValueId
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current_instructions.push(MirInstruction::Call {
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dst: None, // tail call, no return value captured
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func: func_name_id,
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callee: None, // Phase 27-shortterm: no Callee resolution
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args: args.clone(),
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effects: EffectMask::PURE,
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});
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}
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JoinInst::Jump { cont, args, cond } => {
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// TODO: S-4.4 で継続実装
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eprintln!(
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"[joinir_vm_bridge] WARNING: Jump instruction not yet implemented (cont={:?}, args={:?}, cond={:?})",
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cont, args, cond
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);
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// Phase 27-shortterm S-4.4-A: Jump with condition → Branch + Return
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// Jump represents an exit continuation (k_exit) in skip_ws pattern
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eprintln!("[joinir_vm_bridge] Converting Jump to cont={:?}, args={:?}, cond={:?}", cont, args, cond);
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match cond {
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Some(cond_var) => {
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// Conditional jump: Branch to exit block
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let exit_block_id = BasicBlockId(next_block_id);
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next_block_id += 1;
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let continue_block_id = BasicBlockId(next_block_id);
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next_block_id += 1;
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// Emit Branch in current block
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current_instructions.push(MirInstruction::Branch {
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condition: *cond_var,
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then_bb: exit_block_id,
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else_bb: continue_block_id,
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});
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// Finalize current block
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if let Some(block) = mir_func.blocks.get_mut(¤t_block_id) {
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block.instructions = current_instructions;
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}
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// Create exit block with Return
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let exit_value = args.first().copied();
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let mut exit_block = crate::mir::BasicBlock::new(exit_block_id);
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exit_block.instructions.push(MirInstruction::Return {
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value: exit_value,
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});
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mir_func.blocks.insert(exit_block_id, exit_block);
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// Create continue block (will be populated by subsequent instructions)
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let continue_block = crate::mir::BasicBlock::new(continue_block_id);
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mir_func.blocks.insert(continue_block_id, continue_block);
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// Continue in the next block
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current_block_id = continue_block_id;
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current_instructions = Vec::new();
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}
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None => {
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// Unconditional jump: direct Return
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let exit_value = args.first().copied();
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current_instructions.push(MirInstruction::Return {
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value: exit_value,
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});
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// Finalize current block
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if let Some(block) = mir_func.blocks.get_mut(¤t_block_id) {
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block.instructions = current_instructions;
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}
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// No continuation after unconditional return
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current_instructions = Vec::new();
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}
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}
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}
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JoinInst::Ret { value } => {
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if let Some(val_id) = value {
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instructions.push(MirInstruction::Return {
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value: Some(*val_id),
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});
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} else {
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instructions.push(MirInstruction::Return { value: None });
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current_instructions.push(MirInstruction::Return {
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value: *value,
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});
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// Finalize current block
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if let Some(block) = mir_func.blocks.get_mut(¤t_block_id) {
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block.instructions = current_instructions;
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}
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current_instructions = Vec::new();
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}
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}
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}
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// Entry block に命令を登録
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if let Some(block) = mir_func.blocks.get_mut(&entry_block) {
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block.instructions = instructions;
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// Finalize any remaining instructions in the last block
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if !current_instructions.is_empty() {
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if let Some(block) = mir_func.blocks.get_mut(¤t_block_id) {
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block.instructions = current_instructions;
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}
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}
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Ok(mir_func)
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