--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mlir/test/mlir-tblgen/op-error.td	Tue Jun 08 06:07:14 2021 +0900
@@ -0,0 +1,36 @@
+// RUN: not mlir-tblgen -gen-op-decls -I %S/../../include -DERROR1 %s 2>&1 | FileCheck --check-prefix=ERROR1 %s
+// RUN: not mlir-tblgen -gen-op-decls -I %S/../../include -DERROR2 %s 2>&1 | FileCheck --check-prefix=ERROR2 %s
+// RUN: not mlir-tblgen -gen-op-decls -I %S/../../include -DERROR3 %s 2>&1 | FileCheck --check-prefix=ERROR3 %s
+
+include "mlir/IR/OpBase.td"
+
+def Test_Dialect : Dialect {
+  let name = "test_dialect";
+}
+
+#ifdef ERROR1
+// ERROR1: error: expected 'ins'
+def OpInsMissing : Op<Test_Dialect, "ins_missing"> {
+  let builders = [
+    OpBuilder<(outs)>
+  ];
+}
+#endif
+
+#ifdef ERROR2
+// ERROR2: error: expected an argument with default value after other arguments with default values
+def OpDefaultValueNotTrailing : Op<Test_Dialect, "default_value"> {
+  let builders = [
+    OpBuilder<(ins CArg<"int", "42">, "int")>
+  ];
+}
+#endif
+
+#ifdef ERROR3
+// ERROR3: error: expected an argument with default value after other arguments with default values
+def OpDefaultValueNotTrailing : Op<Test_Dialect, "default_value"> {
+  let builders = [
+    OpBuilder<(ins CArg<"int", "42">, CArg<"int">)>
+  ];
+}
+#endif