Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/ProfileData/Coverage/CoverageMappingWriter.h b/linux-x64/clang/include/llvm/ProfileData/Coverage/CoverageMappingWriter.h
new file mode 100644
index 0000000..b6f864a
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+++ b/linux-x64/clang/include/llvm/ProfileData/Coverage/CoverageMappingWriter.h
@@ -0,0 +1,62 @@
+//===- CoverageMappingWriter.h - Code coverage mapping writer ---*- 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 support for writing coverage mapping data for
+// instrumentation based coverage.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_PROFILEDATA_COVERAGE_COVERAGEMAPPINGWRITER_H
+#define LLVM_PROFILEDATA_COVERAGE_COVERAGEMAPPINGWRITER_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ProfileData/Coverage/CoverageMapping.h"
+
+namespace llvm {
+
+class raw_ostream;
+
+namespace coverage {
+
+/// \brief Writer of the filenames section for the instrumentation
+/// based code coverage.
+class CoverageFilenamesSectionWriter {
+ ArrayRef<StringRef> Filenames;
+
+public:
+ CoverageFilenamesSectionWriter(ArrayRef<StringRef> Filenames)
+ : Filenames(Filenames) {}
+
+ /// \brief Write encoded filenames to the given output stream.
+ void write(raw_ostream &OS);
+};
+
+/// \brief Writer for instrumentation based coverage mapping data.
+class CoverageMappingWriter {
+ ArrayRef<unsigned> VirtualFileMapping;
+ ArrayRef<CounterExpression> Expressions;
+ MutableArrayRef<CounterMappingRegion> MappingRegions;
+
+public:
+ CoverageMappingWriter(ArrayRef<unsigned> VirtualFileMapping,
+ ArrayRef<CounterExpression> Expressions,
+ MutableArrayRef<CounterMappingRegion> MappingRegions)
+ : VirtualFileMapping(VirtualFileMapping), Expressions(Expressions),
+ MappingRegions(MappingRegions) {}
+
+ /// \brief Write encoded coverage mapping data to the given output stream.
+ void write(raw_ostream &OS);
+};
+
+} // end namespace coverage
+
+} // end namespace llvm
+
+#endif // LLVM_PROFILEDATA_COVERAGE_COVERAGEMAPPINGWRITER_H