Don't print end-of-directive tokens in -E output

This comes up when pre-processing standalone .s files containing
hash-prefixed comments. The pre-processor should skip the unknown
directive and not emit an extra newline as we were doing.

Fixes PR34950

llvm-svn: 315953

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/Frontend/PrintPreprocessedOutput.cpp b/clang/lib/Frontend/PrintPreprocessedOutput.cpp
index 8ae9038..2e02329 100644
--- a/clang/lib/Frontend/PrintPreprocessedOutput.cpp
+++ b/clang/lib/Frontend/PrintPreprocessedOutput.cpp
@@ -720,6 +720,12 @@ static void PrintPreprocessedTokens(Preprocessor &PP, Token &Tok,
       // -traditional-cpp the lexer keeps /all/ whitespace, including comments.
       SourceLocation StartLoc = Tok.getLocation();
       Callbacks->MoveToLine(StartLoc.getLocWithOffset(Tok.getLength()));
+    } else if (Tok.is(tok::eod)) {
+      // Don't print end of directive tokens, since they are typically newlines
+      // that mess up our line tracking. These come from unknown pre-processor
+      // directives or hash-prefixed comments in standalone assembly files.
+      PP.Lex(Tok);
+      continue;
     } else if (Tok.is(tok::annot_module_include)) {
       // PrintPPOutputPPCallbacks::InclusionDirective handles producing
       // appropriate output here. Ignore this token entirely.