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

utils/TableGen/DAGISelMatcher.cpp

@@ -15,6 +15,8 @@
 #include "llvm/ADT/StringExtras.h"
 using namespace llvm;
 
+void Matcher::anchor() { }
+
 void Matcher::dump() const {
   print(errs(), 0);
 }
@@ -324,6 +326,10 @@ unsigned EmitNodeMatcherCommon::getHashImpl() const {
 }
 
 
+void EmitNodeMatcher::anchor() { }
+
+void MorphNodeToMatcher::anchor() { }
+
 unsigned MarkGlueResultsMatcher::getHashImpl() const {
   return HashUnsigneds(GlueResultNodes.begin(), GlueResultNodes.end());
 }