1 files changed, 2 insertions, 46 deletions

diff --git a/clang/lib/Frontend/FrontendAction.cpp b/clang/lib/Frontend/FrontendAction.cpp
index 2eb91a7fb4f..39fc1371a9e 100644
--- a/clang/lib/Frontend/FrontendAction.cpp
+++ b/clang/lib/Frontend/FrontendAction.cpp
@@ -19,7 +19,6 @@
 #include "clang/Frontend/MultiplexConsumer.h"
 #include "clang/Frontend/Utils.h"
 #include "clang/Lex/HeaderSearch.h"
-#include "clang/Lex/LiteralSupport.h"
 #include "clang/Lex/Preprocessor.h"
 #include "clang/Lex/PreprocessorOptions.h"
 #include "clang/Parse/ParseAST.h"
@@ -188,42 +187,6 @@ FrontendAction::CreateWrappedASTConsumer(CompilerInstance &CI,
   return llvm::make_unique<MultiplexConsumer>(std::move(Consumers));
 }
 
-// For preprocessed files, if the first line is the linemarker and specifies
-// the original source file name, use that name as the input file name.
-static bool ReadOriginalFileName(CompilerInstance &CI, std::string &InputFile)
-{
-  bool Invalid = false;
-  auto &SourceMgr = CI.getSourceManager();
-  auto MainFileID = SourceMgr.getMainFileID();
-  const auto *MainFileBuf = SourceMgr.getBuffer(MainFileID, &Invalid);
-  if (Invalid)
-    return false;
-
-  std::unique_ptr<Lexer> RawLexer(
-      new Lexer(MainFileID, MainFileBuf, SourceMgr, CI.getLangOpts()));
-
-  // If the first line has the syntax of
-  //
-  // # NUM "FILENAME"
-  //
-  // we use FILENAME as the input file name.
-  Token T;
-  if (RawLexer->LexFromRawLexer(T) || T.getKind() != tok::hash)
-    return false;
-  if (RawLexer->LexFromRawLexer(T) || T.isAtStartOfLine() ||
-      T.getKind() != tok::numeric_constant)
-    return false;
-  RawLexer->LexFromRawLexer(T);
-  if (T.isAtStartOfLine() || T.getKind() != tok::string_literal)
-    return false;
-
-  StringLiteralParser Literal(T, CI.getPreprocessor());
-  if (Literal.hadError)
-    return false;
-  InputFile = Literal.GetString().str();
-  return true;
-}
-
 bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
                                      const FrontendInputFile &Input) {
   assert(!Instance && "Already processing a source file!");
@@ -372,13 +335,6 @@ bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
     if (!isModelParsingAction())
       CI.createASTContext();
 
-    // For preprocessed files, check if the first line specifies the original
-    // source file name with a linemarker.
-    std::string OrigFile;
-    if (Input.isPreprocessed())
-      if (ReadOriginalFileName(CI, OrigFile))
-        InputFile = OrigFile;
-
     std::unique_ptr<ASTConsumer> Consumer =
         CreateWrappedASTConsumer(CI, InputFile);
     if (!Consumer)
@@ -465,9 +421,9 @@ bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
 
   // If there is a layout overrides file, attach an external AST source that
   // provides the layouts from that file.
-  if (!CI.getFrontendOpts().OverrideRecordLayoutsFile.empty() &&
+  if (!CI.getFrontendOpts().OverrideRecordLayoutsFile.empty() && 
       CI.hasASTContext() && !CI.getASTContext().getExternalSource()) {
-    IntrusiveRefCntPtr<ExternalASTSource>
+    IntrusiveRefCntPtr<ExternalASTSource> 
       Override(new LayoutOverrideSource(
                      CI.getFrontendOpts().OverrideRecordLayoutsFile));
     CI.getASTContext().setExternalSource(Override);