1 files changed, 2 insertions, 24 deletions

diff --git a/clang/lib/Lex/PPMacroExpansion.cpp b/clang/lib/Lex/PPMacroExpansion.cpp
index bc25dcd8ead..d698f0e6578 100644
--- a/clang/lib/Lex/PPMacroExpansion.cpp
+++ b/clang/lib/Lex/PPMacroExpansion.cpp
@@ -363,7 +363,6 @@ void Preprocessor::RegisterBuiltinMacros() {
   }
 
   // Clang Extensions.
-  Ident__FILE_NAME__      = RegisterBuiltinMacro(*this, "__FILE_NAME__");
   Ident__has_feature      = RegisterBuiltinMacro(*this, "__has_feature");
   Ident__has_extension    = RegisterBuiltinMacro(*this, "__has_extension");
   Ident__has_builtin      = RegisterBuiltinMacro(*this, "__has_builtin");
@@ -1475,8 +1474,7 @@ void Preprocessor::ExpandBuiltinMacro(Token &Tok) {
     // __LINE__ expands to a simple numeric value.
     OS << (PLoc.isValid()? PLoc.getLine() : 1);
     Tok.setKind(tok::numeric_constant);
-  } else if (II == Ident__FILE__ || II == Ident__BASE_FILE__ ||
-             II == Ident__FILE_NAME__) {
+  } else if (II == Ident__FILE__ || II == Ident__BASE_FILE__) {
     // C99 6.10.8: "__FILE__: The presumed name of the current source file (a
     // character string literal)". This can be affected by #line.
     PresumedLoc PLoc = SourceMgr.getPresumedLoc(Tok.getLocation());
@@ -1497,27 +1495,7 @@ void Preprocessor::ExpandBuiltinMacro(Token &Tok) {
     // Escape this filename.  Turn '\' -> '\\' '"' -> '\"'
     SmallString<128> FN;
     if (PLoc.isValid()) {
-      // __FILE_NAME__ is a Clang-specific extension that expands to the
-      // the last part of __FILE__.
-      if (II == Ident__FILE_NAME__) {
-        // Try to get the last path component.
-        StringRef PLFileName = PLoc.getFilename();
-        size_t LastSep = PLFileName.find_last_of('/');
-#ifdef _WIN32
-        // On Windows targets, absolute paths can be normalized to use
-        // backslashes instead - handle this potential case here.
-        if (LastSep == StringRef::npos)
-          LastSep = PLFileName.find_last_of('\\');
-#endif
-        // Skip the separator and get the last part, otherwise fall back on
-        // returning the original full filename.
-        if (LastSep != StringRef::npos)
-          FN += PLFileName.substr(LastSep+1);
-        else
-          FN += PLFileName;
-      } else {
-        FN += PLoc.getFilename();
-      }
+      FN += PLoc.getFilename();
       Lexer::Stringify(FN);
       OS << '"' << FN << '"';
     }