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diff --git a/src/ir/eh-utils.h b/src/ir/eh-utils.h
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+/*
+ * Copyright 2021 WebAssembly Community Group participants
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef wasm_ir_eh_h
+#define wasm_ir_eh_h
+
+namespace wasm {
+
+class Expression;
+
+namespace EHUtils {
+
+// Returns true if a 'pop' instruction exists in a valid location, which means
+// right after a 'catch' instruction in binary writing order.
+// - This assumes there should be at least a single pop. So given a catch body
+//   whose tag type is void or a catch_all's body, this returns false.
+// - This returns true even if there are more pops after the first one within a
+//   catch body, which is invalid. That will be taken care of in validation.
+bool isPopValid(Expression* catchBody);
+
+} // namespace EHUtils
+
+} // namespace wasm
+
+#endif // wasm_ir_eh_h