DebugInfo: Split DWARF + gmlt + no-split-dwarf-inlining shouldn't emit anything to the .dwo file

This configuration (due to r349207) was intended not to emit any DWO CU,
but a degenerate CU was still being emitted - containing a header and a
DW_TAG_compile_unit with no attributes.

Under that situation, emit nothing to the .dwo file. (since this is a
dynamic property of the input the .dwo file is still emitted, just with
nothing in it (so a valid, but empty, ELF file) - if some other CU
didn't satisfy this criteria, its DWO CU would still go there, etc)

llvm-svn: 353771

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 0bbd54f5411..1106b859859 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2124,9 +2124,9 @@ void DwarfDebug::emitDebugLoc() {
 }
 
 void DwarfDebug::emitDebugLocDWO() {
-  Asm->OutStreamer->SwitchSection(
-      Asm->getObjFileLowering().getDwarfLocDWOSection());
   for (const auto &List : DebugLocs.getLists()) {
+    Asm->OutStreamer->SwitchSection(
+        Asm->getObjFileLowering().getDwarfLocDWOSection());
     Asm->OutStreamer->EmitLabel(List.Label);
     for (const auto &Entry : DebugLocs.getEntries(List)) {
       // GDB only supports startx_length in pre-standard split-DWARF.