llvm: restore codegen and interpreter pipeline

src/backend/llvm/compiler/aot.rs

@@ -0,0 +1,15 @@
+use super::LLVMCompiler;
+use crate::box_trait::NyashBox;
+use crate::mir::function::MirModule;
+
+impl LLVMCompiler {
+    pub fn compile_and_execute(
+        &mut self,
+        mir_module: &MirModule,
+        temp_path: &str,
+    ) -> Result<Box<dyn NyashBox>, String> {
+        let obj_path = format!("{}.o", temp_path);
+        self.compile_module(mir_module, &obj_path)?;
+        self.run_interpreter(mir_module)
+    }
+}