initialize isstore/isload fields in ctor, fixing PR1695

llvm-svn: 42222
diff --git a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSimple.cpp b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSimple.cpp
index f12e285..6014fe9 100644
--- a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSimple.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSimple.cpp
@@ -125,6 +125,8 @@
     , StageEnd(NULL)
     , Latency(0)
     , IsCall(false)
+    , IsLoad(false)
+    , IsStore(false)
     , Slot(0)
     , Group(NULL)
 #ifndef NDEBUG