feat(control_tree): Phase 131 P1.5-P2 DirectValue exit reconnection

Implement DirectValue mode for Normalized shadow exit handling:

**P1.5 Changes**:
- Add ExitReconnectMode::DirectValue (skip exit PHI generation)
- Carry remapped_exit_values through merge result
- Update host variable_map directly with exit values
- Fix loop(true) { x = 1; break }; return x to return 1 correctly

**P2 Changes**:
- Normalize k_exit continuation entry/exit edges
- Rewrite TailCall(k_exit) → Jump(exit_block) for proper merge
- Add verify_all_terminator_targets_exist contract check
- Extend ExitLineReconnector to handle DirectValue mode

**Infrastructure**:
- tools/build_llvm.sh: Force TMPDIR under target/ (EXDEV mitigation)
- llvm_exe_runner.sh: Add exit_code verification support
- Phase 131 smokes: Update for dev-only + exit code validation

**Contracts**:
- PHI-free: Normalized path uses continuations only
- Exit values reconnect via remapped ValueIds
- Existing patterns unaffected (既定挙動不変)

Related: Phase 131 loop(true) break-once Normalized support

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

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

tools/build_llvm.sh

@@ -46,6 +46,15 @@ fi
 # Use the cargo target dir when set (helps LLVM EXE smokes that build under /tmp).
 CARGO_TARGET_DIR_EFFECTIVE="${CARGO_TARGET_DIR:-$PWD/target}"
 
+# Rust builds (especially rmeta/rlib finalization) may fail with EXDEV when the temp dir
+# is not compatible with the output directory. Prefer a temp dir under the final output
+# folder so rustc can atomically persist artifacts without cross-device rename issues.
+#
+# NOTE: release/deps may not exist yet on first build, so create it eagerly.
+TMPDIR_EFFECTIVE="${TMPDIR:-$CARGO_TARGET_DIR_EFFECTIVE/release/deps}"
+mkdir -p "$TMPDIR_EFFECTIVE"
+export TMPDIR="$TMPDIR_EFFECTIVE"
+
 BIN_DEFAULT="$CARGO_TARGET_DIR_EFFECTIVE/release/hakorune"
 BIN="${NYASH_BIN:-$BIN_DEFAULT}"
 
@@ -58,10 +67,10 @@ if [[ "$LLVM_FEATURE" == "llvm-inkwell-legacy" ]]; then
   # Legacy inkwell需要LLVM_SYS_180_PREFIX
   _LLVMPREFIX=$(llvm-config-18 --prefix)
   LLVM_SYS_181_PREFIX="${_LLVMPREFIX}" LLVM_SYS_180_PREFIX="${_LLVMPREFIX}" \
-    CARGO_INCREMENTAL=1 cargo build --release -j 24 -p nyash-rust --features "$LLVM_FEATURE" >/dev/null
+    CARGO_INCREMENTAL=0 cargo build --release -j 24 -p nyash-rust --features "$LLVM_FEATURE" >/dev/null
 else
   # llvm-harness（デフォルト）はLLVM_SYS_180_PREFIX不要
-  CARGO_INCREMENTAL=1 cargo build --release -j 24 -p nyash-rust --features "$LLVM_FEATURE" >/dev/null
+  CARGO_INCREMENTAL=0 cargo build --release -j 24 -p nyash-rust --features "$LLVM_FEATURE" >/dev/null
 fi
 
 if [[ ! -x "$BIN" ]]; then

tools/smokes/v2/lib/llvm_exe_runner.sh

@@ -191,3 +191,62 @@ llvm_exe_build_and_run_numeric_smoke() {
   printf "%s\n" "$EXPECTED"
   return 1
 }
+
+llvm_exe_build_and_run_expect_exit_code() {
+  # Required globals:
+  # - INPUT_HAKO
+  # - OUTPUT_EXE
+  # - EXPECTED_EXIT_CODE
+  #
+  # Optional:
+  # - LLVM_BUILD_LOG
+  # - RUN_TIMEOUT_SECS
+
+  if [ -z "${INPUT_HAKO:-}" ] || [ -z "${OUTPUT_EXE:-}" ] || [ -z "${EXPECTED_EXIT_CODE:-}" ]; then
+    echo "[FAIL] llvm_exe_build_and_run_expect_exit_code: missing INPUT_HAKO/OUTPUT_EXE/EXPECTED_EXIT_CODE"
+    return 1
+  fi
+
+  mkdir -p "$(dirname "$OUTPUT_EXE")"
+
+  echo "[INFO] Building: $INPUT_HAKO → $OUTPUT_EXE"
+
+  local cargo_target_dir
+  cargo_target_dir="$(llvm_exe_cargo_target_dir)"
+
+  # Ensure we use the compiler binary built in that target dir.
+  local nyash_bin="$cargo_target_dir/release/hakorune"
+  local obj_out="$cargo_target_dir/aot_objects/$(basename "$INPUT_HAKO").o"
+  mkdir -p "$(dirname "$obj_out")"
+
+  local build_log="${LLVM_BUILD_LOG:-/tmp/llvm_exe_build.log}"
+  if ! env CARGO_TARGET_DIR="$cargo_target_dir" NYASH_BIN="$nyash_bin" NYASH_LLVM_OBJ_OUT="$obj_out" NYASH_DISABLE_PLUGINS=0 \
+    "$NYASH_ROOT/tools/build_llvm.sh" "$INPUT_HAKO" -o "$OUTPUT_EXE" 2>&1 | tee "$build_log"; then
+    echo "[FAIL] build_llvm.sh failed"
+    tail -n 80 "$build_log"
+    return 1
+  fi
+
+  if [ ! -x "$OUTPUT_EXE" ]; then
+    echo "[FAIL] Executable not created or not executable: $OUTPUT_EXE"
+    ls -la "$OUTPUT_EXE" 2>/dev/null || echo "File does not exist"
+    return 1
+  fi
+
+  echo "[INFO] Executing: $OUTPUT_EXE"
+
+  set +e
+  local output
+  output=$(timeout "${RUN_TIMEOUT_SECS:-10}" env NYASH_DISABLE_PLUGINS=0 "$OUTPUT_EXE" 2>&1)
+  local exit_code=$?
+  set -e
+
+  if [ "$exit_code" -ne "$EXPECTED_EXIT_CODE" ]; then
+    echo "[FAIL] Execution exit code mismatch: got $exit_code, expected $EXPECTED_EXIT_CODE"
+    echo "[INFO] Raw output (tail):"
+    echo "$output" | tail -n 80
+    return 1
+  fi
+
+  return 0
+}

tools/smokes/v2/profiles/integration/apps/phase131_loop_true_break_once_llvm_exe.sh

@@ -9,6 +9,11 @@ require_env || exit 2
 
 llvm_exe_preflight_or_skip || exit 0
 
+# Phase 131 is a dev-only Normalized shadow loop case.
+# LLVM EXE emission must run with JoinIR dev/strict enabled, otherwise it will freeze.
+export NYASH_JOINIR_DEV=1
+export HAKO_JOINIR_STRICT=1
+
 # Phase 131: minimal plugin set (StringBox, ConsoleBox, IntegerBox only)
 STRINGBOX_SO="$NYASH_ROOT/plugins/nyash-string-plugin/libnyash_string_plugin.so"
 CONSOLEBOX_SO="$NYASH_ROOT/plugins/nyash-console-plugin/libnyash_console_plugin.so"
@@ -25,11 +30,10 @@ llvm_exe_ensure_plugins_or_fail || exit 1
 INPUT_HAKO="$NYASH_ROOT/apps/tests/phase131_loop_true_break_once_min.hako"
 OUTPUT_EXE="$NYASH_ROOT/tmp/phase131_loop_true_break_once_llvm_exe"
 
-EXPECTED=$'1'
-EXPECTED_LINES=1
+EXPECTED_EXIT_CODE=1
 LLVM_BUILD_LOG="/tmp/phase131_loop_true_break_once_build.log"
-if llvm_exe_build_and_run_numeric_smoke; then
-  test_pass "phase131_loop_true_break_once_llvm_exe: output matches expected (1)"
+if llvm_exe_build_and_run_expect_exit_code; then
+  test_pass "phase131_loop_true_break_once_llvm_exe: exit code matches expected (1)"
 else
   exit 1
 fi

tools/smokes/v2/profiles/integration/apps/phase131_loop_true_break_once_vm.sh

@@ -6,7 +6,6 @@
 # - Dev-only: NYASH_JOINIR_DEV=1 HAKO_JOINIR_STRICT=1
 
 source "$(dirname "$0")/../../../lib/test_runner.sh"
-source "$(dirname "$0")/../../../lib/output_validator.sh"
 export SMOKES_USE_PYVM=0
 require_env || exit 2
 
@@ -34,15 +33,8 @@ if [ "$EXIT_CODE" -eq 124 ]; then
   FAIL_COUNT=$((FAIL_COUNT + 1))
 elif [ "$EXIT_CODE" -eq 1 ]; then
   # Phase 131: expected output is exit code 1 (return value)
-  EXPECTED=$'1'
-  if validate_numeric_output 1 "$EXPECTED" "$OUTPUT"; then
-    echo "[PASS] Output verified: 1 (exit code: $EXIT_CODE)"
-    PASS_COUNT=$((PASS_COUNT + 1))
-  else
-    echo "[INFO] output (tail):"
-    echo "$OUTPUT" | tail -n 50 || true
-    FAIL_COUNT=$((FAIL_COUNT + 1))
-  fi
+  echo "[PASS] exit code verified: 1"
+  PASS_COUNT=$((PASS_COUNT + 1))
 else
   echo "[FAIL] hakorune failed with exit code $EXIT_CODE (expected 1)"
   echo "[INFO] output (tail):"