Do not print empty DW_AT_comp_dir.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60965 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
index 4476be3..e41e4cb 100644
--- a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
@@ -1805,7 +1805,8 @@
AddString(Die, DW_AT_producer, DW_FORM_string, UnitDesc->getProducer());
AddUInt (Die, DW_AT_language, DW_FORM_data1, UnitDesc->getLanguage());
AddString(Die, DW_AT_name, DW_FORM_string, UnitDesc->getFileName());
- AddString(Die, DW_AT_comp_dir, DW_FORM_string, UnitDesc->getDirectory());
+ if (!UnitDesc->getDirectory().empty())
+ AddString(Die, DW_AT_comp_dir, DW_FORM_string, UnitDesc->getDirectory());
// Construct compile unit.
CompileUnit *Unit = new CompileUnit(UnitDesc, ID, Die);