Fix the location issue on SLIR

include/serene/slir/dialect.td

@@ -109,6 +109,8 @@ def ReturnOp: Serene_Op<"return", [NoSideEffect, HasParent<"FnOp">,
     }];
 
     let arguments = (ins AnyType:$operand);
+    let assemblyFormat =
+          [{ attr-dict $operand  `:` type($operand) }];
 
     // let verifier = [{ return serene::sir::verify(*this); }];
 

src/serene/namespace.cpp

@@ -24,6 +24,7 @@
 
 #include "serene/namespace.h"
 
+#include "mlir/IR/OperationSupport.h"
 #include "serene/context.h"
 #include "serene/errors/constants.h"
 #include "serene/exprs/expression.h"
@@ -110,6 +111,10 @@ void Namespace::dump() {
     return;
   }
 
+  // mlir::OpPrintingFlags flags;
+  // flags.enableDebugInfo();
+
+  // maybeModuleOp.getValue()->print(llvm::outs(), flags);
   maybeModuleOp.getValue()->dump();
 };