refactor(llvm): Phase 132-P1 follow-up - bind block_end_values and clear predeclared PHIs

src/llvm_py/builders/function_lower.py

@@ -51,6 +51,14 @@ def lower_function(builder, func_data: Dict[str, Any]):
         builder.bb_map.clear()
     except Exception:
         builder.bb_map = {}
+    # Phase 132-P1: Clear per-function predeclared PHI placeholders (avoid cross-function leakage)
+    try:
+        builder.predeclared_ret_phis.clear()
+    except Exception:
+        try:
+            builder.predeclared_ret_phis = {}
+        except Exception:
+            pass
 
     # Phase 132-P1: Create function-local context Box
     # This automatically isolates all function-scoped state
@@ -63,6 +71,7 @@ def lower_function(builder, func_data: Dict[str, Any]):
     builder.phi_manager = context.phi_manager
     builder.block_phi_incomings = context.block_phi_incomings
     builder.def_blocks = context.def_blocks
+    builder.block_end_values = context.block_end_values
 
     # Bind resolver to context (redirects caches to context storage)
     builder.resolver.bind_context(context)
@@ -311,7 +320,7 @@ def lower_function(builder, func_data: Dict[str, Any]):
             vmap=builder.vmap,
             bb_map=builder.bb_map,
             preds=builder.preds,
-            block_end_values=builder.block_end_values,
+            block_end_values=context.block_end_values,
             resolver=builder.resolver,
             trace_phi=os.environ.get('NYASH_LLVM_TRACE_PHI') == '1',
             verbose=os.environ.get('NYASH_CLI_VERBOSE') == '1',