Assert if InflightSet is not cleared after instruction selecting a BB.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28459 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp
index af28f83..f58ca60 100644
--- a/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -182,6 +182,7 @@
   Indent = 0;
 #endif
   DAG.setRoot(SelectRoot(DAG.getRoot()));
+  assert(InFlightSet.empty() && "ISel InFlightSet has not been emptied!");
 #ifndef NDEBUG
   DEBUG(std::cerr << "===== Instruction selection ends:\n");
 #endif