Don't emit anything into the debug_ranges section if we aren't emitting

any ranges - this includes CU ranges where we were previously emitting an
end list marker even if we didn't have a list.

Testcase includes a test for line table only code emission as the problem
was noticed while writing this test.

llvm-svn: 202357

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index ca060e2cc22..2eff17176b8 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2873,7 +2873,7 @@ void DwarfDebug::emitDebugRanges() {
     }
 
     // Now emit a range for the CU itself.
-    if (useCURanges()) {
+    if (useCURanges() && TheCU->getRanges().size()) {
       Asm->OutStreamer.EmitLabel(
           Asm->GetTempSymbol("cu_ranges", TheCU->getUniqueID()));
       const SmallVectorImpl<RangeSpan> &Ranges = TheCU->getRanges();