llvm: unify lowering via Resolver and Cursor; remove non-sealed PHI wiring; apply Resolver to extern/call/boxcall/arrays/maps/mem; add llvmlite harness docs; add LLVM layer overview; add LoopForm preheader

src/llvm_py/test_simple.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+"""
+Simple test for Nyash LLVM Python backend
+Tests basic MIR -> LLVM compilation
+"""
+
+import json
+from llvm_builder import NyashLLVMBuilder
+
+# Simple MIR test case: function that returns 42
+test_mir = {
+    "functions": {
+        "main": {
+            "name": "main",
+            "params": [],
+            "return_type": "i64",
+            "entry_block": 0,
+            "blocks": {
+                "0": {
+                    "instructions": [
+                        {
+                            "kind": "Const",
+                            "dst": 0,
+                            "value": {"type": "i64", "value": 42}
+                        }
+                    ],
+                    "terminator": {
+                        "kind": "Return",
+                        "value": 0
+                    }
+                }
+            }
+        }
+    }
+}
+
+def test_basic():
+    """Test basic MIR -> LLVM compilation"""
+    builder = NyashLLVMBuilder()
+    
+    # Generate LLVM IR
+    llvm_ir = builder.build_from_mir(test_mir)
+    print("Generated LLVM IR:")
+    print(llvm_ir)
+    
+    # Compile to object file
+    builder.compile_to_object("test_simple.o")
+    print("\nCompiled to test_simple.o")
+
+if __name__ == "__main__":
+    test_basic()