Snapshots: add loop_nested_if golden and wire into CI check

- New: docs/status/golden/loop_nested_if.mir.txt
- Update: tools/ci_check_golden.sh to include nested-if loop case
- Source: local_tests/loop_nested_if_test.nyash

docs/status/golden/loop_nested_if.mir.txt

@@ -0,0 +1,68 @@
+🔌 v2 plugin system initialized from nyash.toml
+✅ v2 plugin system fully configured
+🚀 Nyash MIR Compiler - Processing file: local_tests/loop_nested_if_test.nyash 🚀
+🚀 MIR Output for local_tests/loop_nested_if_test.nyash:
+; MIR Module: main
+
+; Module Statistics:
+;   Functions: 1
+;   Globals: 0
+;   Total Blocks: 7
+;   Total Instructions: 28
+;   Pure Functions: 1
+
+define void @main() {
+  ; Function Statistics:
+  ;   Blocks: 7
+  ;   Instructions: 28
+  ;   Values: 0
+  ;   Phi Functions: 2
+  ;   Pure: yes
+
+bb0:
+    0: safepoint
+    1: %1 = const 0
+    2: %2 = new IntegerBox(%1)
+    3: call %2.birth(%1)
+    4: br label bb1
+    ; effects: pure|read|alloc
+
+bb1:  ; preds(bb6)
+    0: %3 = phi [%2, bb0], [%13, bb6]
+    1: %4 = const 1
+    2: %5 = new IntegerBox(%4)
+    3: call %5.birth(%4)
+    4: %6 = icmp Lt %3, %5
+    5: br %6, label bb2, label bb3
+    ; effects: pure|read|alloc
+
+bb2:
+    0: safepoint
+    1: %7 = const true
+    2: %8 = new BoolBox(%7)
+    3: call %8.birth(%7)
+    4: br %8, label bb4, label bb5
+    ; effects: pure|read|alloc
+
+bb3:
+    0: %14 = const void
+    1: ret %14
+
+bb4:
+    0: %9 = const 1
+    1: %10 = new IntegerBox(%9)
+    2: call %10.birth(%9)
+    3: br label bb6
+    ; effects: pure|read|alloc
+
+bb5:
+    0: %11 = const 2
+    1: %12 = new IntegerBox(%11)
+    2: call %12.birth(%11)
+    3: br label bb6
+    ; effects: pure|read|alloc
+
+bb6:
+    0: %13 = phi [%10, bb4], [%12, bb5]
+    1: br label bb1
+}

tools/ci_check_golden.sh

@@ -13,6 +13,7 @@ PAIRS=(
   "local_tests/simple_loop_test.nyash docs/status/golden/loop_simple.mir.txt"
   "local_tests/test_vm_array_getset.nyash docs/status/golden/boxcall_array_getset.mir.txt"
   "local_tests/typeop_mixed.nyash docs/status/golden/typeop_mixed.mir.txt"
+  "local_tests/loop_nested_if_test.nyash docs/status/golden/loop_nested_if.mir.txt"
 )
 
 for pair in "${PAIRS[@]}"; do