r212408 - Update for llvm api change.
Alp Toker
alp at nuanti.com
Sun Jul 6 19:16:31 PDT 2014
Hi Rafael,
The commit log is short on details -- could you explain why this change
was needed?
The new ErrorOr<std::unique_ptr<MemoryBuffer>> pattern looks really
verbose compared to what was there before, mostly doubling the lines of
code you have to write to create a MemoryBuffer for a file.
And it's no longer possible to do if (std::error_code EC = ...) which
makes error-checking an explicit step that's easy to forget.
I know ObjectFile is moving fast right now so guess we can wrap the
functions to present a more conventional API for clang until that work
settles, or maybe just try getting used to this form, but I wanted to
check in with you first.
Alp.
On 06/07/2014 20:43, Rafael Espindola wrote:
> Author: rafael
> Date: Sun Jul 6 12:43:24 2014
> New Revision: 212408
>
> URL: http://llvm.org/viewvc/llvm-project?rev=212408&view=rev
> Log:
> Update for llvm api change.
>
> Modified:
> cfe/trunk/lib/ARCMigrate/FileRemapper.cpp
> cfe/trunk/lib/ARCMigrate/ObjCMT.cpp
> cfe/trunk/lib/Basic/VirtualFileSystem.cpp
> cfe/trunk/lib/Driver/ToolChains.cpp
> cfe/trunk/lib/Format/Format.cpp
> cfe/trunk/lib/Frontend/CompilerInstance.cpp
> cfe/trunk/lib/Frontend/CompilerInvocation.cpp
> cfe/trunk/lib/Lex/PTHLexer.cpp
> cfe/trunk/lib/Serialization/GlobalModuleIndex.cpp
> cfe/trunk/lib/Serialization/ModuleManager.cpp
> cfe/trunk/lib/Tooling/JSONCompilationDatabase.cpp
> cfe/trunk/tools/arcmt-test/arcmt-test.cpp
> cfe/trunk/tools/clang-format/ClangFormat.cpp
> cfe/trunk/tools/driver/cc1as_main.cpp
>
> Modified: cfe/trunk/lib/ARCMigrate/FileRemapper.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/ARCMigrate/FileRemapper.cpp?rev=212408&r1=212407&r2=212408&view=diff
> ==============================================================================
> --- cfe/trunk/lib/ARCMigrate/FileRemapper.cpp (original)
> +++ cfe/trunk/lib/ARCMigrate/FileRemapper.cpp Sun Jul 6 12:43:24 2014
> @@ -65,12 +65,13 @@ bool FileRemapper::initFromFile(StringRe
>
> std::vector<std::pair<const FileEntry *, const FileEntry *> > pairs;
>
> - std::unique_ptr<llvm::MemoryBuffer> fileBuf;
> - if (llvm::MemoryBuffer::getFile(infoFile.c_str(), fileBuf))
> + llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> fileBuf =
> + llvm::MemoryBuffer::getFile(infoFile.c_str());
> + if (!fileBuf)
> return report("Error opening file: " + infoFile, Diag);
>
> SmallVector<StringRef, 64> lines;
> - fileBuf->getBuffer().split(lines, "\n");
> + fileBuf.get()->getBuffer().split(lines, "\n");
>
> for (unsigned idx = 0; idx+3 <= lines.size(); idx += 3) {
> StringRef fromFilename = lines[idx];
>
> Modified: cfe/trunk/lib/ARCMigrate/ObjCMT.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/ARCMigrate/ObjCMT.cpp?rev=212408&r1=212407&r2=212408&view=diff
> ==============================================================================
> --- cfe/trunk/lib/ARCMigrate/ObjCMT.cpp (original)
> +++ cfe/trunk/lib/ARCMigrate/ObjCMT.cpp Sun Jul 6 12:43:24 2014
> @@ -1943,12 +1943,13 @@ public:
> bool parse(StringRef File, SmallVectorImpl<EditEntry> &Entries) {
> using namespace llvm::yaml;
>
> - std::unique_ptr<llvm::MemoryBuffer> FileBuf;
> - if (llvm::MemoryBuffer::getFile(File, FileBuf))
> + llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> FileBufOrErr =
> + llvm::MemoryBuffer::getFile(File);
> + if (!FileBufOrErr)
> return true;
>
> llvm::SourceMgr SM;
> - Stream YAMLStream(FileBuf.release(), SM);
> + Stream YAMLStream(FileBufOrErr.get().release(), SM);
> document_iterator I = YAMLStream.begin();
> if (I == YAMLStream.end())
> return true;
>
> Modified: cfe/trunk/lib/Basic/VirtualFileSystem.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/VirtualFileSystem.cpp?rev=212408&r1=212407&r2=212408&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Basic/VirtualFileSystem.cpp (original)
> +++ cfe/trunk/lib/Basic/VirtualFileSystem.cpp Sun Jul 6 12:43:24 2014
> @@ -126,8 +126,13 @@ std::error_code RealFile::getBuffer(cons
> bool RequiresNullTerminator,
> bool IsVolatile) {
> assert(FD != -1 && "cannot get buffer for closed file");
> - return MemoryBuffer::getOpenFile(FD, Name.str().c_str(), Result, FileSize,
> - RequiresNullTerminator, IsVolatile);
> + ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
> + MemoryBuffer::getOpenFile(FD, Name.str().c_str(), FileSize,
> + RequiresNullTerminator, IsVolatile);
> + if (std::error_code EC = BufferOrErr.getError())
> + return EC;
> + Result = std::move(BufferOrErr.get());
> + return std::error_code();
> }
>
> // FIXME: This is terrible, we need this for ::close.
> @@ -1202,4 +1207,4 @@ recursive_directory_iterator::increment(
> State.reset(); // end iterator
>
> return *this;
> -}
> \ No newline at end of file
> +}
>
> Modified: cfe/trunk/lib/Driver/ToolChains.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains.cpp?rev=212408&r1=212407&r2=212408&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Driver/ToolChains.cpp (original)
> +++ cfe/trunk/lib/Driver/ToolChains.cpp Sun Jul 6 12:43:24 2014
> @@ -2794,8 +2794,9 @@ static bool IsUbuntu(enum Distro Distro)
> }
>
> static Distro DetectDistro(llvm::Triple::ArchType Arch) {
> - std::unique_ptr<llvm::MemoryBuffer> File;
> - if (!llvm::MemoryBuffer::getFile("/etc/lsb-release", File)) {
> + llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> File =
> + llvm::MemoryBuffer::getFile("/etc/lsb-release");
> + if (File) {
> StringRef Data = File.get()->getBuffer();
> SmallVector<StringRef, 8> Lines;
> Data.split(Lines, "\n");
> @@ -2820,7 +2821,8 @@ static Distro DetectDistro(llvm::Triple:
> return Version;
> }
>
> - if (!llvm::MemoryBuffer::getFile("/etc/redhat-release", File)) {
> + File = llvm::MemoryBuffer::getFile("/etc/redhat-release");
> + if (File) {
> StringRef Data = File.get()->getBuffer();
> if (Data.startswith("Fedora release"))
> return Fedora;
> @@ -2836,7 +2838,8 @@ static Distro DetectDistro(llvm::Triple:
> return UnknownDistro;
> }
>
> - if (!llvm::MemoryBuffer::getFile("/etc/debian_version", File)) {
> + File = llvm::MemoryBuffer::getFile("/etc/debian_version");
> + if (File) {
> StringRef Data = File.get()->getBuffer();
> if (Data[0] == '5')
> return DebianLenny;
>
> Modified: cfe/trunk/lib/Format/Format.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Format/Format.cpp?rev=212408&r1=212407&r2=212408&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Format/Format.cpp (original)
> +++ cfe/trunk/lib/Format/Format.cpp Sun Jul 6 12:43:24 2014
> @@ -2082,13 +2082,14 @@ FormatStyle getStyle(StringRef StyleName
> }
>
> if (IsFile) {
> - std::unique_ptr<llvm::MemoryBuffer> Text;
> - if (std::error_code ec =
> - llvm::MemoryBuffer::getFile(ConfigFile.c_str(), Text)) {
> - llvm::errs() << ec.message() << "\n";
> + llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Text =
> + llvm::MemoryBuffer::getFile(ConfigFile.c_str());
> + if (std::error_code EC = Text.getError()) {
> + llvm::errs() << EC.message() << "\n";
> break;
> }
> - if (std::error_code ec = parseConfiguration(Text->getBuffer(), &Style)) {
> + if (std::error_code ec =
> + parseConfiguration(Text.get()->getBuffer(), &Style)) {
> if (ec == ParseError::Unsuitable) {
> if (!UnsuitableConfigFiles.empty())
> UnsuitableConfigFiles.append(", ");
>
> Modified: cfe/trunk/lib/Frontend/CompilerInstance.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInstance.cpp?rev=212408&r1=212407&r2=212408&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Frontend/CompilerInstance.cpp (original)
> +++ cfe/trunk/lib/Frontend/CompilerInstance.cpp Sun Jul 6 12:43:24 2014
> @@ -683,11 +683,14 @@ bool CompilerInstance::InitializeSourceM
> SourceMgr.setMainFileID(
> SourceMgr.createFileID(File, SourceLocation(), Kind));
> } else {
> - std::unique_ptr<llvm::MemoryBuffer> SB;
> - if (std::error_code ec = llvm::MemoryBuffer::getSTDIN(SB)) {
> - Diags.Report(diag::err_fe_error_reading_stdin) << ec.message();
> + llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> SBOrErr =
> + llvm::MemoryBuffer::getSTDIN();
> + if (std::error_code EC = SBOrErr.getError()) {
> + Diags.Report(diag::err_fe_error_reading_stdin) << EC.message();
> return false;
> }
> + std::unique_ptr<llvm::MemoryBuffer> SB = std::move(SBOrErr.get());
> +
> const FileEntry *File = FileMgr.getVirtualFile(SB->getBufferIdentifier(),
> SB->getBufferSize(), 0);
> SourceMgr.setMainFileID(
>
> Modified: cfe/trunk/lib/Frontend/CompilerInvocation.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=212408&r1=212407&r2=212408&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Frontend/CompilerInvocation.cpp (original)
> +++ cfe/trunk/lib/Frontend/CompilerInvocation.cpp Sun Jul 6 12:43:24 2014
> @@ -1957,14 +1957,16 @@ std::string CompilerInvocation::getModul
> // $sysroot/System/Library/CoreServices/SystemVersion.plist
> // as part of the module hash.
> if (!hsOpts.Sysroot.empty()) {
> - std::unique_ptr<llvm::MemoryBuffer> buffer;
> SmallString<128> systemVersionFile;
> systemVersionFile += hsOpts.Sysroot;
> llvm::sys::path::append(systemVersionFile, "System");
> llvm::sys::path::append(systemVersionFile, "Library");
> llvm::sys::path::append(systemVersionFile, "CoreServices");
> llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
> - if (!llvm::MemoryBuffer::getFile(systemVersionFile.str(), buffer)) {
> +
> + llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> buffer =
> + llvm::MemoryBuffer::getFile(systemVersionFile.str());
> + if (buffer) {
> code = hash_combine(code, buffer.get()->getBuffer());
>
> struct stat statBuf;
> @@ -2031,14 +2033,15 @@ createVFSFromCompilerInvocation(const Co
> Overlay(new vfs::OverlayFileSystem(vfs::getRealFileSystem()));
> // earlier vfs files are on the bottom
> for (const std::string &File : CI.getHeaderSearchOpts().VFSOverlayFiles) {
> - std::unique_ptr<llvm::MemoryBuffer> Buffer;
> - if (llvm::MemoryBuffer::getFile(File, Buffer)) {
> + llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
> + llvm::MemoryBuffer::getFile(File);
> + if (!Buffer) {
> Diags.Report(diag::err_missing_vfs_overlay_file) << File;
> return IntrusiveRefCntPtr<vfs::FileSystem>();
> }
>
> IntrusiveRefCntPtr<vfs::FileSystem> FS =
> - vfs::getVFSFromYAML(Buffer.release(), /*DiagHandler*/nullptr);
> + vfs::getVFSFromYAML(Buffer->release(), /*DiagHandler*/ nullptr);
> if (!FS.get()) {
> Diags.Report(diag::err_invalid_vfs_overlay) << File;
> return IntrusiveRefCntPtr<vfs::FileSystem>();
>
> Modified: cfe/trunk/lib/Lex/PTHLexer.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Lex/PTHLexer.cpp?rev=212408&r1=212407&r2=212408&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Lex/PTHLexer.cpp (original)
> +++ cfe/trunk/lib/Lex/PTHLexer.cpp Sun Jul 6 12:43:24 2014
> @@ -440,13 +440,15 @@ static void InvalidPTH(DiagnosticsEngine
> PTHManager *PTHManager::Create(const std::string &file,
> DiagnosticsEngine &Diags) {
> // Memory map the PTH file.
> - std::unique_ptr<llvm::MemoryBuffer> File;
> + llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> FileOrErr =
> + llvm::MemoryBuffer::getFile(file);
>
> - if (llvm::MemoryBuffer::getFile(file, File)) {
> + if (!FileOrErr) {
> // FIXME: Add ec.message() to this diag.
> Diags.Report(diag::err_invalid_pth_file) << file;
> return nullptr;
> }
> + std::unique_ptr<llvm::MemoryBuffer> File = std::move(FileOrErr.get());
>
> using namespace llvm::support;
>
>
> Modified: cfe/trunk/lib/Serialization/GlobalModuleIndex.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Serialization/GlobalModuleIndex.cpp?rev=212408&r1=212407&r2=212408&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Serialization/GlobalModuleIndex.cpp (original)
> +++ cfe/trunk/lib/Serialization/GlobalModuleIndex.cpp Sun Jul 6 12:43:24 2014
> @@ -239,9 +239,11 @@ GlobalModuleIndex::readIndex(StringRef P
> IndexPath += Path;
> llvm::sys::path::append(IndexPath, IndexFileName);
>
> - std::unique_ptr<llvm::MemoryBuffer> Buffer;
> - if (llvm::MemoryBuffer::getFile(IndexPath.c_str(), Buffer))
> + llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> BufferOrErr =
> + llvm::MemoryBuffer::getFile(IndexPath.c_str());
> + if (!BufferOrErr)
> return std::make_pair(nullptr, EC_NotFound);
> + std::unique_ptr<llvm::MemoryBuffer> Buffer = std::move(BufferOrErr.get());
>
> /// \brief The bitstream reader from which we'll read the AST file.
> llvm::BitstreamReader Reader((const unsigned char *)Buffer->getBufferStart(),
>
> Modified: cfe/trunk/lib/Serialization/ModuleManager.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Serialization/ModuleManager.cpp?rev=212408&r1=212407&r2=212408&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Serialization/ModuleManager.cpp (original)
> +++ cfe/trunk/lib/Serialization/ModuleManager.cpp Sun Jul 6 12:43:24 2014
> @@ -106,9 +106,13 @@ ModuleManager::addModule(StringRef FileN
> // Open the AST file.
> std::error_code ec;
> if (FileName == "-") {
> - ec = llvm::MemoryBuffer::getSTDIN(New->Buffer);
> + llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buf =
> + llvm::MemoryBuffer::getSTDIN();
> + ec = Buf.getError();
> if (ec)
> ErrorStr = ec.message();
> + else
> + New->Buffer = std::move(Buf.get());
> } else {
> // Leave the FileEntry open so if it gets read again by another
> // ModuleManager it must be the same underlying file.
>
> Modified: cfe/trunk/lib/Tooling/JSONCompilationDatabase.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Tooling/JSONCompilationDatabase.cpp?rev=212408&r1=212407&r2=212408&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Tooling/JSONCompilationDatabase.cpp (original)
> +++ cfe/trunk/lib/Tooling/JSONCompilationDatabase.cpp Sun Jul 6 12:43:24 2014
> @@ -144,15 +144,14 @@ volatile int JSONAnchorSource = 0;
> JSONCompilationDatabase *
> JSONCompilationDatabase::loadFromFile(StringRef FilePath,
> std::string &ErrorMessage) {
> - std::unique_ptr<llvm::MemoryBuffer> DatabaseBuffer;
> - std::error_code Result =
> - llvm::MemoryBuffer::getFile(FilePath, DatabaseBuffer);
> - if (Result) {
> + llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> DatabaseBuffer =
> + llvm::MemoryBuffer::getFile(FilePath);
> + if (std::error_code Result = DatabaseBuffer.getError()) {
> ErrorMessage = "Error while opening JSON database: " + Result.message();
> return nullptr;
> }
> std::unique_ptr<JSONCompilationDatabase> Database(
> - new JSONCompilationDatabase(DatabaseBuffer.release()));
> + new JSONCompilationDatabase(DatabaseBuffer->release()));
> if (!Database->parse(ErrorMessage))
> return nullptr;
> return Database.release();
>
> Modified: cfe/trunk/tools/arcmt-test/arcmt-test.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/tools/arcmt-test/arcmt-test.cpp?rev=212408&r1=212407&r2=212408&view=diff
> ==============================================================================
> --- cfe/trunk/tools/arcmt-test/arcmt-test.cpp (original)
> +++ cfe/trunk/tools/arcmt-test/arcmt-test.cpp Sun Jul 6 12:43:24 2014
> @@ -207,17 +207,15 @@ static bool performTransformations(Strin
> static bool filesCompareEqual(StringRef fname1, StringRef fname2) {
> using namespace llvm;
>
> - std::unique_ptr<MemoryBuffer> file1;
> - MemoryBuffer::getFile(fname1, file1);
> + ErrorOr<std::unique_ptr<MemoryBuffer>> file1 = MemoryBuffer::getFile(fname1);
> if (!file1)
> return false;
>
> - std::unique_ptr<MemoryBuffer> file2;
> - MemoryBuffer::getFile(fname2, file2);
> + ErrorOr<std::unique_ptr<MemoryBuffer>> file2 = MemoryBuffer::getFile(fname2);
> if (!file2)
> return false;
>
> - return file1->getBuffer() == file2->getBuffer();
> + return file1.get()->getBuffer() == file2.get()->getBuffer();
> }
>
> static bool verifyTransformedFiles(ArrayRef<std::string> resultFiles) {
> @@ -238,18 +236,19 @@ static bool verifyTransformedFiles(Array
> resultMap[sys::path::stem(fname)] = fname;
> }
>
> - std::unique_ptr<MemoryBuffer> inputBuf;
> + ErrorOr<std::unique_ptr<MemoryBuffer>> inputBuf = std::error_code();
> if (RemappingsFile.empty())
> - MemoryBuffer::getSTDIN(inputBuf);
> + inputBuf = MemoryBuffer::getSTDIN();
> else
> - MemoryBuffer::getFile(RemappingsFile, inputBuf);
> + inputBuf = MemoryBuffer::getFile(RemappingsFile);
> if (!inputBuf) {
> errs() << "error: could not read remappings input\n";
> return true;
> }
>
> SmallVector<StringRef, 8> strs;
> - inputBuf->getBuffer().split(strs, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false);
> + inputBuf.get()->getBuffer().split(strs, "\n", /*MaxSplit=*/-1,
> + /*KeepEmpty=*/false);
>
> if (strs.empty()) {
> errs() << "error: no files to verify from stdin\n";
>
> Modified: cfe/trunk/tools/clang-format/ClangFormat.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/tools/clang-format/ClangFormat.cpp?rev=212408&r1=212407&r2=212408&view=diff
> ==============================================================================
> --- cfe/trunk/tools/clang-format/ClangFormat.cpp (original)
> +++ cfe/trunk/tools/clang-format/ClangFormat.cpp Sun Jul 6 12:43:24 2014
> @@ -209,11 +209,13 @@ static bool format(StringRef FileName) {
> IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs),
> new DiagnosticOptions);
> SourceManager Sources(Diagnostics, Files);
> - std::unique_ptr<MemoryBuffer> Code;
> - if (std::error_code ec = MemoryBuffer::getFileOrSTDIN(FileName, Code)) {
> - llvm::errs() << ec.message() << "\n";
> + ErrorOr<std::unique_ptr<MemoryBuffer>> CodeOrErr =
> + MemoryBuffer::getFileOrSTDIN(FileName);
> + if (std::error_code EC = CodeOrErr.getError()) {
> + llvm::errs() << EC.message() << "\n";
> return true;
> }
> + std::unique_ptr<llvm::MemoryBuffer> Code = std::move(CodeOrErr.get());
> if (Code->getBufferSize() == 0)
> return false; // Empty files are formatted correctly.
> FileID ID = createInMemoryFile(FileName, Code.get(), Sources, Files);
>
> Modified: cfe/trunk/tools/driver/cc1as_main.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/tools/driver/cc1as_main.cpp?rev=212408&r1=212407&r2=212408&view=diff
> ==============================================================================
> --- cfe/trunk/tools/driver/cc1as_main.cpp (original)
> +++ cfe/trunk/tools/driver/cc1as_main.cpp Sun Jul 6 12:43:24 2014
> @@ -281,17 +281,18 @@ static bool ExecuteAssembler(AssemblerIn
> if (!TheTarget)
> return Diags.Report(diag::err_target_unknown_triple) << Opts.Triple;
>
> - std::unique_ptr<MemoryBuffer> Buffer;
> - if (std::error_code ec =
> - MemoryBuffer::getFileOrSTDIN(Opts.InputFile, Buffer)) {
> - Error = ec.message();
> + ErrorOr<std::unique_ptr<MemoryBuffer>> Buffer =
> + MemoryBuffer::getFileOrSTDIN(Opts.InputFile);
> +
> + if (std::error_code EC = Buffer.getError()) {
> + Error = EC.message();
> return Diags.Report(diag::err_fe_error_reading) << Opts.InputFile;
> }
>
> SourceMgr SrcMgr;
>
> // Tell SrcMgr about this buffer, which is what the parser will pick up.
> - SrcMgr.AddNewSourceBuffer(Buffer.release(), SMLoc());
> + SrcMgr.AddNewSourceBuffer(Buffer->release(), SMLoc());
>
> // Record the location of the include directories so that the lexer can find
> // it later.
>
>
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