Fix debug info crashes for PIC16.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88761 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 7c5c23b..6d660a6 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -138,7 +138,7 @@
   if (MMI)
     MMI->AnalyzeModule(M);
   DW = getAnalysisIfAvailable<DwarfWriter>();
-  if (DW)
+  if (DW && MAI->doesSupportDebugInformation())
     DW->BeginModule(&M, MMI, O, this, MAI);
 
   return false;