Remember to set flag.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129579 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveRangeEdit.cpp b/lib/CodeGen/LiveRangeEdit.cpp
index 88ee457..b1dc901 100644
--- a/lib/CodeGen/LiveRangeEdit.cpp
+++ b/lib/CodeGen/LiveRangeEdit.cpp
@@ -59,6 +59,7 @@
       continue;
     checkRematerializable(VNI, DefMI, tii, aa);
   }
+  scannedRemattable_ = true;
 }
 
 bool LiveRangeEdit::anyRematerializable(LiveIntervals &lis,