Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146960 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveRangeEdit.cpp b/lib/CodeGen/LiveRangeEdit.cpp
index a470877..08ad085 100644
--- a/lib/CodeGen/LiveRangeEdit.cpp
+++ b/lib/CodeGen/LiveRangeEdit.cpp
@@ -29,6 +29,8 @@
 STATISTIC(NumDCEFoldedLoads, "Number of single use loads folded after DCE");
 STATISTIC(NumFracRanges,     "Number of live ranges fractured by DCE");
 
+void LiveRangeEdit::Delegate::anchor() { }
+
 LiveInterval &LiveRangeEdit::createFrom(unsigned OldReg,
                                         LiveIntervals &LIS,
                                         VirtRegMap &VRM) {