Fix thinko check for number of operands to be the one that actually
might have more than 19 operands. Add a testcase to make sure I
never screw that up again.

Part of rdar://11026482

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153961 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 420f2cd..b3a9a14 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1200,7 +1200,7 @@
   if (SP.Verify()) {
     // Check for number of operands since the compatibility is
     // cheap here.
-    if (Scope->getNumOperands() > 19)
+    if (SP->getNumOperands() > 19)
       return DebugLoc::get(SP.getScopeLineNumber(), 0, SP);
     else
       return DebugLoc::get(SP.getLineNumber(), 0, SP);