Reverting the virtual file system implementation, because it triggers an assertion

in our internal build bots.

This reverts commits 201618, 201635, 201636, 201639, 201685, 201691, and 201696.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@201755 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 162 deletions

diff --git a/include/clang/Basic/VirtualFileSystem.h b/include/clang/Basic/VirtualFileSystem.h
deleted file mode 100644
index 694c6ddec8..0000000000
--- a/include/clang/Basic/VirtualFileSystem.h
+++ /dev/null
@@ -1,162 +0,0 @@
-//===- VirtualFileSystem.h - Virtual File System Layer ----------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-/// \file
-/// \brief Defines the virtual file system interface vfs::FileSystem.
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_CLANG_BASIC_VIRTUAL_FILE_SYSTEM_H
-#define LLVM_CLANG_BASIC_VIRTUAL_FILE_SYSTEM_H
-
-#include "clang/Basic/LLVM.h"
-#include "llvm/ADT/IntrusiveRefCntPtr.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/ErrorOr.h"
-
-namespace llvm {
-class MemoryBuffer;
-}
-
-namespace clang {
-namespace vfs {
-
-/// \brief The result of a \p status operation.
-class Status {
-  std::string Name;
-  std::string ExternalName;
-  llvm::sys::fs::UniqueID UID;
-  llvm::sys::TimeValue MTime;
-  uint32_t User;
-  uint32_t Group;
-  uint64_t Size;
-  llvm::sys::fs::file_type Type;
-  llvm::sys::fs::perms Perms;
-
-public:
-  Status() : Type(llvm::sys::fs::file_type::status_error) {}
-  Status(const llvm::sys::fs::file_status &Status);
-  Status(StringRef Name, StringRef RealName, llvm::sys::fs::UniqueID UID,
-         llvm::sys::TimeValue MTime, uint32_t User, uint32_t Group,
-         uint64_t Size, llvm::sys::fs::file_type Type,
-         llvm::sys::fs::perms Perms);
-
-  /// \brief Returns the name this status was looked up by.
-  StringRef getName() const { return Name; }
-
-  /// \brief Returns the name to use outside the compiler.
-  ///
-  /// For example, in diagnostics or debug info we should use this name.
-  StringRef getExternalName() const { return ExternalName; }
-
-  void setName(StringRef N) { Name = N; }
-  void setExternalName(StringRef N) { ExternalName = N; }
-
-  /// @name Status interface from llvm::sys::fs
-  /// @{
-  llvm::sys::fs::file_type getType() const { return Type; }
-  llvm::sys::fs::perms getPermissions() const { return Perms; }
-  llvm::sys::TimeValue getLastModificationTime() const { return MTime; }
-  llvm::sys::fs::UniqueID getUniqueID() const { return UID; }
-  uint32_t getUser() const { return User; }
-  uint32_t getGroup() const { return Group; }
-  uint64_t getSize() const { return Size; }
-  void setType(llvm::sys::fs::file_type v) { Type = v; }
-  void setPermissions(llvm::sys::fs::perms p) { Perms = p; }
-  /// @}
-  /// @name Status queries
-  /// These are static queries in llvm::sys::fs.
-  /// @{
-  bool equivalent(const Status &Other) const;
-  bool isDirectory() const;
-  bool isRegularFile() const;
-  bool isOther() const;
-  bool isSymlink() const;
-  bool isStatusKnown() const;
-  bool exists() const;
-  /// @}
-};
-
-/// \brief Represents an open file.
-class File {
-public:
-  /// \brief Destroy the file after closing it (if open).
-  /// Sub-classes should generally call close() inside their destructors.  We
-  /// cannot do that from the base class, since close is virtual.
-  virtual ~File();
-  /// \brief Get the status of the file.
-  virtual llvm::ErrorOr<Status> status() = 0;
-  /// \brief Get the contents of the file as a \p MemoryBuffer.
-  virtual llvm::error_code getBuffer(const Twine &Name,
-                                     OwningPtr<llvm::MemoryBuffer> &Result,
-                                     int64_t FileSize = -1,
-                                     bool RequiresNullTerminator = true) = 0;
-  /// \brief Closes the file.
-  virtual llvm::error_code close() = 0;
-};
-
-/// \brief The virtual file system interface.
-class FileSystem : public RefCountedBase<FileSystem> {
-public:
-  virtual ~FileSystem();
-
-  /// \brief Get the status of the entry at \p Path, if one exists.
-  virtual llvm::ErrorOr<Status> status(const Twine &Path) = 0;
-  /// \brief Get a \p File object for the file at \p Path, if one exists.
-  virtual llvm::error_code openFileForRead(const Twine &Path,
-                                           OwningPtr<File> &Result) = 0;
-
-  /// This is a convenience method that opens a file, gets its content and then
-  /// closes the file.
-  llvm::error_code getBufferForFile(const Twine &Name,
-                                    OwningPtr<llvm::MemoryBuffer> &Result,
-                                    int64_t FileSize = -1,
-                                    bool RequiresNullTerminator = true);
-};
-
-/// \brief Gets an \p vfs::FileSystem for the 'real' file system, as seen by
-/// the operating system.
-IntrusiveRefCntPtr<FileSystem> getRealFileSystem();
-
-/// \brief A file system that allows overlaying one \p AbstractFileSystem on top
-/// of another.
-///
-/// Consists of a stack of >=1 \p FileSytem objects, which are treated as being
-/// one merged file system. When there is a directory that exists in more than
-/// one file system, the \p OverlayFileSystem contains a directory containing
-/// the union of their contents.  The attributes (permissions, etc.) of the
-/// top-most (most recently added) directory are used.  When there is a file
-/// that exists in more than one file system, the file in the top-most file
-/// system overrides the other(s).
-class OverlayFileSystem : public FileSystem {
-  typedef SmallVector<IntrusiveRefCntPtr<FileSystem>, 1> FileSystemList;
-  typedef FileSystemList::reverse_iterator iterator;
-
-  /// \brief The stack of file systems, implemented as a list in order of
-  /// their addition.
-  FileSystemList FSList;
-
-  /// \brief Get an iterator pointing to the most recently added file system.
-  iterator overlays_begin() { return FSList.rbegin(); }
-
-  /// \brief Get an iterator pointing one-past the least recently added file
-  /// system.
-  iterator overlays_end() { return FSList.rend(); }
-
-public:
-  OverlayFileSystem(IntrusiveRefCntPtr<FileSystem> Base);
-  /// \brief Pushes a file system on top of the stack.
-  void pushOverlay(IntrusiveRefCntPtr<FileSystem> FS);
-
-  llvm::ErrorOr<Status> status(const Twine &Path) LLVM_OVERRIDE;
-  llvm::error_code openFileForRead(const Twine &Path,
-                                   OwningPtr<File> &Result) LLVM_OVERRIDE;
-};
-
-} // end namespace vfs
-} // end namespace clang
-#endif // LLVM_CLANG_BASIC_VIRTUAL_FILE_SYSTEM_H