Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/MC/MCLabel.h b/linux-x64/clang/include/llvm/MC/MCLabel.h
new file mode 100644
index 0000000..b6579fd
--- /dev/null
+++ b/linux-x64/clang/include/llvm/MC/MCLabel.h
@@ -0,0 +1,57 @@
+//===- MCLabel.h - Machine Code Directional Local Labels --------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the declaration of the MCLabel class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_MC_MCLABEL_H
+#define LLVM_MC_MCLABEL_H
+
+namespace llvm {
+
+class raw_ostream;
+
+/// \brief Instances of this class represent a label name in the MC file,
+/// and MCLabel are created and uniqued by the MCContext class. MCLabel
+/// should only be constructed for valid instances in the object file.
+class MCLabel {
+ // \brief The instance number of this Directional Local Label.
+ unsigned Instance;
+
+private: // MCContext creates and uniques these.
+ friend class MCContext;
+
+ MCLabel(unsigned instance) : Instance(instance) {}
+
+public:
+ MCLabel(const MCLabel &) = delete;
+ MCLabel &operator=(const MCLabel &) = delete;
+
+ /// \brief Get the current instance of this Directional Local Label.
+ unsigned getInstance() const { return Instance; }
+
+ /// \brief Increment the current instance of this Directional Local Label.
+ unsigned incInstance() { return ++Instance; }
+
+ /// \brief Print the value to the stream \p OS.
+ void print(raw_ostream &OS) const;
+
+ /// \brief Print the value to stderr.
+ void dump() const;
+};
+
+inline raw_ostream &operator<<(raw_ostream &OS, const MCLabel &Label) {
+ Label.print(OS);
+ return OS;
+}
+
+} // end namespace llvm
+
+#endif // LLVM_MC_MCLABEL_H