[weak vtables] Remove a bunch of weak vtables

This patch removes most of the trivial cases of weak vtables by pinning them to
a single object file.

Differential Revision: http://llvm-reviews.chandlerc.com/D2068

Reviewed by Andy

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194865 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/MachineScheduler.cpp

@@ -72,6 +72,10 @@ static cl::opt<bool> VerifyScheduling("verify-misched", cl::Hidden,
 // DAG subtrees must have at least this many nodes.
 static const unsigned MinSubtreeSize = 8;
 
+// pin vtable to this file
+void MachineSchedStrategy::anchor() {}
+void ScheduleDAGMutation::anchor() {}
+
 //===----------------------------------------------------------------------===//
 // Machine Instruction Scheduling Pass and Registry
 //===----------------------------------------------------------------------===//