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

lib/VMCore/Constants.cpp

@@ -40,6 +40,8 @@ using namespace llvm;
 //                              Constant Class
 //===----------------------------------------------------------------------===//
 
+void Constant::anchor() { }
+
 bool Constant::isNegativeZeroValue() const {
   // Floating point values have an explicit -0.0 value.
   if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
@@ -363,6 +365,8 @@ void Constant::removeDeadConstantUsers() const {
 //                                ConstantInt
 //===----------------------------------------------------------------------===//
 
+void ConstantInt::anchor() { }
+
 ConstantInt::ConstantInt(IntegerType *Ty, const APInt& V)
   : Constant(Ty, ConstantIntVal, 0, 0), Val(V) {
   assert(V.getBitWidth() == Ty->getBitWidth() && "Invalid constant for type");
@@ -486,6 +490,8 @@ static const fltSemantics *TypeToFloatSemantics(Type *Ty) {
   return &APFloat::PPCDoubleDouble;
 }
 
+void ConstantFP::anchor() { }
+
 /// get() - This returns a constant fp for the specified value in the
 /// specified type.  This should only be used for simple constant values like
 /// 2.0/1.0 etc, that are known-valid both as double and as the target format.