feat(normalization): Phase 142 P1 - LLVM EXE parity for loop normalization

Phase 142-loopstmt P1: LLVM EXE smoke test for statement-level loop normalization

- Added: tools/smokes/v2/profiles/integration/apps/phase142_loop_stmt_only_then_return_length_min_llvm_exe.sh
- Verification: Exit code 3 parity with VM test
- Status: ✅ PASS (exit code 3, string length computed correctly)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

docs/development/current/main/10-Now.md

@@ -2,7 +2,6 @@
 
 ## Next (planned)
 
-- Phase 142-loopstmt P1: LLVM EXE smoke test 追加（Phase 130 完了後）
 - Phase 141 P2+: Call/MethodCall 対応（effects + typing を分離して段階投入）
 - Phase 143-loopvocab: StepTree の語彙拡張（loop 内 if/break/continue を「新パターン追加」ではなく「語彙追加」で吸収）
 - 詳細: `docs/development/current/main/30-Backlog.md`

docs/development/current/main/30-Backlog.md

@@ -8,14 +8,6 @@ Related:
 
 ## 直近（JoinIR/selfhost）
 
-- **Phase 142-loopstmt P1（planned）: LLVM EXE smoke を追加**
-  - 前提（DONE）: Phase 142-loopstmt P0（正規化単位を statement（loop 1個）へ寄せる）
-  - ねらい: VM で固定済みの fixture を LLVM EXE でも parity 固定する。
-  - 受け入れ条件:
-    - 既存 fixture をそのまま使う（新パターン追加をしない）
-    - out-of-scope は `Ok(None)` でフォールバック（既定挙動不変）
-    - Phase 130 の LLVM EXE gate が前提（未完なら SKIP を維持）
-
 - **Phase 141 P2+（planned）: Call/MethodCall（effects + typing を分離して段階投入）**
   - ねらい: pure/impure 境界を壊さずに、impure lowering を段階投入する。
   - 前提（DONE）:

docs/development/current/main/phases/README.md

@@ -11,7 +11,7 @@
 - **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（planned）**: LLVM EXE smoke（同 fixture）を追加
+- **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）

docs/development/current/main/phases/phase-142-loopstmt/README.md

@@ -163,7 +163,14 @@ bash tools/smokes/v2/profiles/integration/apps/phase142_loop_stmt_only_then_retu
 
 **File**: `tools/smokes/v2/profiles/integration/apps/phase142_loop_stmt_only_then_return_length_min_llvm_exe.sh`
 
-**Status**: ⚠️ TODO in P1 (requires Phase 130 LLVM EXE gate complete)
+**Status**: ✅ P1 COMPLETE (LLVM EXE parity achieved)
+
+**Command**:
+```bash
+bash tools/smokes/v2/profiles/integration/apps/phase142_loop_stmt_only_then_return_length_min_llvm_exe.sh
+```
+
+**Result**: ✅ PASS (exit code 3, parity with VM)
 
 ---
 
@@ -305,13 +312,11 @@ bash tools/smokes/v2/profiles/integration/apps/phase142_loop_stmt_only_then_retu
 
 ## Next Steps
 
-### P1: LLVM EXE Smoke Test (TODO)
+### P1: LLVM EXE Smoke Test (DONE ✅)
 
-**File**: `tools/smokes/v2/profiles/integration/apps/phase142_loop_stmt_only_then_return_length_min_llvm_exe.sh`
+- File: `tools/smokes/v2/profiles/integration/apps/phase142_loop_stmt_only_then_return_length_min_llvm_exe.sh`
-
+- Gate: `llvm_exe_preflight_or_skip` により、Phase 130 の LLVM EXE 前提が満たされない環境では SKIP を維持
-**Prerequisites**: Phase 130 LLVM EXE gate complete
+- Contract: exit code 3 parity with VM
-
-**Expected**: exit code 3 parity with VM
 
 ### P2: Code Contract Enforcement (Planned)
 

src/mir/control_tree/normalized_shadow/builder.rs

@@ -93,7 +93,7 @@ impl StepTreeNormalizedShadowLowererBox {
         // Phase 126: EnvLayout 生成（available_inputs を使用）
         let env_layout = EnvLayout::from_contract(&step_tree.contract, available_inputs);
 
-        // Phase 131: loop(true) break-once pattern
+        // Phase 131: loop(true) break-once pattern (simpler, higher priority)
         if let Some((module, meta)) = LoopTrueBreakOnceBuilderBox::lower(step_tree, &env_layout)? {
             return Ok(Some((module, meta)));
         }

tools/smokes/v2/profiles/integration/apps/phase142_loop_stmt_only_then_return_length_min_llvm_exe.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+# Phase 142 P0: Loop normalization as single statement (LLVM EXE parity)
+#
+# Verifies that loop(true) normalization returns consumed=1, allowing
+# subsequent statements (return s.length()) to be processed normally.
+# Expected: exit code 3 (s="abc" → s.length() → 3)
+#
+# Dev-only: NYASH_JOINIR_DEV=1 HAKO_JOINIR_STRICT=1
+
+source "$(dirname "$0")/../../../lib/test_runner.sh"
+source "$(dirname "$0")/../../../lib/llvm_exe_runner.sh"
+export SMOKES_USE_PYVM=0
+require_env || exit 2
+
+# Preflight check (SKIP gate)
+llvm_exe_preflight_or_skip || exit 0
+
+# JoinIR dev mode (Phase 130+ gate)
+require_joinir_dev
+
+# Minimal plugins (String + Integer for s.length())
+STRINGBOX_SO="$NYASH_ROOT/plugins/nyash-string-plugin/libnyash_string_plugin.so"
+INTEGERBOX_SO="$NYASH_ROOT/plugins/nyash-integer-plugin/libnyash_integer_plugin.so"
+LLVM_REQUIRED_PLUGINS=(
+  "StringBox|$STRINGBOX_SO|nyash-string-plugin"
+  "IntegerBox|$INTEGERBOX_SO|nyash-integer-plugin"
+)
+LLVM_PLUGIN_BUILD_LOG="/tmp/phase142_loop_stmt_llvm_plugin_build.log"
+llvm_exe_ensure_plugins_or_fail || exit 1
+
+# Test configuration
+INPUT_HAKO="$NYASH_ROOT/apps/tests/phase142_loop_stmt_only_then_return_length_min.hako"
+OUTPUT_EXE="$NYASH_ROOT/tmp/phase142_loop_stmt_only_then_return_length_min_llvm_exe"
+
+# Execute (exit code contract)
+EXPECTED_EXIT_CODE=3
+LLVM_BUILD_LOG="/tmp/phase142_loop_stmt_llvm_build.log"
+if llvm_exe_build_and_run_expect_exit_code; then
+  test_pass "phase142_loop_stmt_llvm_exe: exit code matches (3)"
+else
+  exit 1
+fi