1 files changed, 37 insertions, 16 deletions

diff --git a/lib/Frontend/PrintPreprocessedOutput.cpp b/lib/Frontend/PrintPreprocessedOutput.cpp
index a58c935620a2f..77b80e612fbf2 100644
--- a/lib/Frontend/PrintPreprocessedOutput.cpp
+++ b/lib/Frontend/PrintPreprocessedOutput.cpp
@@ -326,8 +326,20 @@ void PrintPPOutputPPCallbacks::InclusionDirective(SourceLocation HashLoc,
   if (Imported) {
     startNewLineIfNeeded();
     MoveToLine(HashLoc);
-    OS << "@import " << Imported->getFullModuleName() << ";"
-       << " /* clang -E: implicit import for \"" << File->getName() << "\" */";
+    if (PP.getLangOpts().ObjC2) {
+      OS << "@import " << Imported->getFullModuleName() << ";"
+         << " /* clang -E: implicit import for \"" << File->getName()
+         << "\" */";
+    } else {
+      // FIXME: Preseve whether this was a
+      // #include/#include_next/#include_macros/#import.
+      OS << "#include "
+         << (IsAngled ? '<' : '"')
+         << FileName
+         << (IsAngled ? '>' : '"')
+         << " /* clang -E: implicit import for module "
+         << Imported->getFullModuleName() << " */";
+    }
     // Since we want a newline after the @import, but not a #<line>, start a new
     // line immediately.
     EmittedTokensOnThisLine = true;
@@ -369,18 +381,16 @@ void PrintPPOutputPPCallbacks::MacroUndefined(const Token &MacroNameTok,
   setEmittedDirectiveOnThisLine();
 }
 
-static void outputPrintable(llvm::raw_ostream& OS,
-                                             const std::string &Str) {
-    for (unsigned i = 0, e = Str.size(); i != e; ++i) {
-      unsigned char Char = Str[i];
-      if (isPrintable(Char) && Char != '\\' && Char != '"')
-        OS << (char)Char;
-      else  // Output anything hard as an octal escape.
-        OS << '\\'
-           << (char)('0'+ ((Char >> 6) & 7))
-           << (char)('0'+ ((Char >> 3) & 7))
-           << (char)('0'+ ((Char >> 0) & 7));
-    }
+static void outputPrintable(raw_ostream &OS, StringRef Str) {
+  for (unsigned char Char : Str) {
+    if (isPrintable(Char) && Char != '\\' && Char != '"')
+      OS << (char)Char;
+    else // Output anything hard as an octal escape.
+      OS << '\\'
+         << (char)('0' + ((Char >> 6) & 7))
+         << (char)('0' + ((Char >> 3) & 7))
+         << (char)('0' + ((Char >> 0) & 7));
+  }
 }
 
 void PrintPPOutputPPCallbacks::PragmaMessage(SourceLocation Loc,
@@ -547,8 +557,10 @@ void PrintPPOutputPPCallbacks::HandleNewlinesInToken(const char *TokStr,
     // If we have \n\r or \r\n, skip both and count as one line.
     if (Len != 1 &&
         (TokStr[1] == '\n' || TokStr[1] == '\r') &&
-        TokStr[0] != TokStr[1])
-      ++TokStr, --Len;
+        TokStr[0] != TokStr[1]) {
+      ++TokStr;
+      --Len;
+    }
   }
 
   if (NumNewlines == 0) return;
@@ -577,6 +589,15 @@ struct UnknownPragmaHandler : public PragmaHandler {
     Callbacks->MoveToLine(PragmaTok.getLocation());
     Callbacks->OS.write(Prefix, strlen(Prefix));
 
+    if (ShouldExpandTokens) {
+      // The first token does not have expanded macros. Expand them, if
+      // required.
+      auto Toks = llvm::make_unique<Token[]>(1);
+      Toks[0] = PragmaTok;
+      PP.EnterTokenStream(std::move(Toks), /*NumToks=*/1,
+                          /*DisableMacroExpansion=*/false);
+      PP.Lex(PragmaTok);
+    }
     Token PrevToken;
     Token PrevPrevToken;
     PrevToken.startToken();