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diff --git a/utils/TableGen/AsmMatcherEmitter.h b/utils/TableGen/AsmMatcherEmitter.h
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+++ b/utils/TableGen/AsmMatcherEmitter.h
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+//===- AsmMatcherEmitter.h - Generate an assembly matcher -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This tablegen backend emits a target specifier matcher for converting parsed
+// assembly operands in the MCInst structures.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef ASMMATCHER_EMITTER_H
+#define ASMMATCHER_EMITTER_H
+
+#include "TableGenBackend.h"
+#include <map>
+#include <vector>
+#include <cassert>
+
+namespace llvm {
+  class AsmMatcherEmitter : public TableGenBackend {
+    RecordKeeper &Records;
+  public:
+    AsmMatcherEmitter(RecordKeeper &R) : Records(R) {}
+
+    // run - Output the matcher, returning true on failure.
+    void run(raw_ostream &o);
+  };
+}
+#endif