[DebugInfo] Only print a single blank line after an empty line table

Commit 84a9756 added an extra blank line at the end of any line table.
However, a blank line is also printed after the line table header, which
meant that two blank lines in a row were being printed after a header,
if there were no rows. This patch defers the post-header blank line
printing until it has been determined that there are rows to print.

Reviewed by: dblaikie

Differential Revision: https://reviews.llvm.org/D71540

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp b/llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp
index 445f4bf48a7..f5b1c40024d 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp
@@ -453,9 +453,9 @@ DWARFDebugLine::LineTable::LineTable() { clear(); }
 void DWARFDebugLine::LineTable::dump(raw_ostream &OS,
                                      DIDumpOptions DumpOptions) const {
   Prologue.dump(OS, DumpOptions);
-  OS << '\n';
 
   if (!Rows.empty()) {
+    OS << '\n';
     Row::dumpTableHeader(OS);
     for (const Row &R : Rows) {
       R.dump(OS);