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diff --git a/compiler/optimizing/instruction_simplifier_x86.h b/compiler/optimizing/instruction_simplifier_x86.h
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+/*Copyright (C) 2018 The Android Open Source Project
+ *
+ * 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 ART_COMPILER_OPTIMIZING_INSTRUCTION_SIMPLIFIER_X86_H_
+#define ART_COMPILER_OPTIMIZING_INSTRUCTION_SIMPLIFIER_X86_H_
+
+#include "nodes.h"
+#include "optimization.h"
+
+namespace art {
+
+class CodeGenerator;
+namespace x86 {
+
+class InstructionSimplifierX86 : public HOptimization {
+ public:
+  InstructionSimplifierX86(HGraph* graph, CodeGenerator* codegen, OptimizingCompilerStats* stats)
+      : HOptimization(graph, kInstructionSimplifierX86PassName, stats),
+        codegen_(codegen) {}
+
+  static constexpr const char* kInstructionSimplifierX86PassName = "instruction_simplifier_x86";
+
+  bool Run() override;
+
+ private:
+  CodeGenerator* codegen_;
+};
+
+}  // namespace x86
+}  // namespace art
+
+#endif  // ART_COMPILER_OPTIMIZING_INSTRUCTION_SIMPLIFIER_X86_H_