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diff --git a/source/fuzz/fuzzer_pass_wrap_vector_synonym.h b/source/fuzz/fuzzer_pass_wrap_vector_synonym.h
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+// Copyright (c) 2021 Shiyu Liu
+//
+// 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 SOURCE_FUZZ_FUZZER_PASS_WRAP_VECTOR_SYNONYM_H_
+#define SOURCE_FUZZ_FUZZER_PASS_WRAP_VECTOR_SYNONYM_H_
+
+#include "source/fuzz/fuzzer_pass.h"
+
+namespace spvtools {
+namespace fuzz {
+
+// Randomly wrap a scalar operation into a vector operation.
+class FuzzerPassWrapVectorSynonym : public FuzzerPass {
+ public:
+  FuzzerPassWrapVectorSynonym(
+      opt::IRContext* ir_context, TransformationContext* transformation_context,
+      FuzzerContext* fuzzer_context,
+      protobufs::TransformationSequence* transformations,
+      bool ignore_inapplicable_transformations);
+
+  void Apply() override;
+};
+
+}  // namespace fuzz
+}  // namespace spvtools
+
+#endif  // SOURCE_FUZZ_FUZZER_PASS_WRAP_VECTOR_SYNONYM_H_