if some functions don't have debug info, we were outputing the same label at the start of each of those functions. This makes assemblers unhappy
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49176 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/DwarfWriter.cpp b/lib/CodeGen/DwarfWriter.cpp
index 010dfa0..947b420 100644
--- a/lib/CodeGen/DwarfWriter.cpp
+++ b/lib/CodeGen/DwarfWriter.cpp
@@ -2720,8 +2720,11 @@
// Emit label for the implicitly defined dbg.stoppoint at the start of
// the function.
- const SourceLineInfo &LineInfo = MMI->getSourceLines()[0];
- Asm->printLabel(LineInfo.getLabelID());
+ const std::vector<SourceLineInfo> &LineInfos = MMI->getSourceLines();
+ if (!LineInfos.empty()) {
+ const SourceLineInfo &LineInfo = LineInfos[0];
+ Asm->printLabel(LineInfo.getLabelID());
+ }
}
/// EndFunction - Gather and emit post-function debug information.