Index: lib/MC/MCParser/AsmParser.cpp
===================================================================
--- lib/MC/MCParser/AsmParser.cpp
+++ lib/MC/MCParser/AsmParser.cpp
@@ -836,6 +836,8 @@
   AsmCond StartingCondState = TheCondState;
   SmallVector<AsmRewrite, 4> AsmStrRewrites;
 
+  StringRef Filename = getContext().getMainFileName();
+
   // If we are generating dwarf for assembly source files save the initial text
   // section and generate a .file directive.
   if (getContext().getGenDwarfForAssembly()) {
@@ -849,9 +851,12 @@
     assert(InsertResult && ".text section should not have debug info yet");
     (void)InsertResult;
     getContext().setGenDwarfFileNumber(getStreamer().EmitDwarfFileDirective(
-        0, StringRef(), getContext().getMainFileName()));
+        0, StringRef(), Filename));
   }
 
+  if (!Filename.empty() && (Filename.compare(StringRef("-")) != 0))
+    Out.EmitFileDirective(Filename);
+
   // While we have input, parse each statement.
   while (Lexer.isNot(AsmToken::Eof)) {
     ParseStatementInfo Info(&AsmStrRewrites);