Revert r194865 and r194874.

This change is incorrect. If you delete virtual destructor of both a base class
and a subclass, then the following code:
  Base *foo = new Child();
  delete foo;
will not cause the destructor for members of Child class. As a result, I observe
plently of memory leaks. Notable examples I investigated are:
ObjectBuffer and ObjectBufferStream, AttributeImpl and StringSAttributeImpl.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194997 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 0 insertions, 11 deletions

diff --git a/lib/CodeGen/MachineRegisterInfo.cpp b/lib/CodeGen/MachineRegisterInfo.cpp
index 7dad84d..ce7d567 100644
--- a/lib/CodeGen/MachineRegisterInfo.cpp
+++ b/lib/CodeGen/MachineRegisterInfo.cpp
@@ -19,9 +19,6 @@
 
 using namespace llvm;
 
-// pin vtable to this file
-void MachineRegisterInfo::Delegate::anchor() {}
-
 MachineRegisterInfo::MachineRegisterInfo(const TargetMachine &TM)
   : TM(TM), TheDelegate(0), IsSSA(true), TracksLiveness(true) {
   VRegInfo.reserve(256);
diff --git a/lib/CodeGen/MachineScheduler.cpp b/lib/CodeGen/MachineScheduler.cpp
index df756ba..3144dfe 100644
--- a/lib/CodeGen/MachineScheduler.cpp
+++ b/lib/CodeGen/MachineScheduler.cpp
@@ -72,10 +72,6 @@ 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
 //===----------------------------------------------------------------------===//
diff --git a/lib/CodeGen/RegAllocBase.cpp b/lib/CodeGen/RegAllocBase.cpp
index 3a4d546..b94ce4d 100644
--- a/lib/CodeGen/RegAllocBase.cpp
+++ b/lib/CodeGen/RegAllocBase.cpp
@@ -50,9 +50,6 @@ bool RegAllocBase::VerifyEnabled = false;
 //                         RegAllocBase Implementation
 //===----------------------------------------------------------------------===//
 
-// pin vtable to this file
-void RegAllocBase::anchor() {}
-
 void RegAllocBase::init(VirtRegMap &vrm,
                         LiveIntervals &lis,
                         LiveRegMatrix &mat) {
diff --git a/lib/CodeGen/RegAllocBase.h b/lib/CodeGen/RegAllocBase.h
index c17a8d9..9c00298 100644
--- a/lib/CodeGen/RegAllocBase.h
+++ b/lib/CodeGen/RegAllocBase.h
@@ -57,7 +57,6 @@ class Spiller;
 /// live range splitting. They must also override enqueue/dequeue to provide an
 /// assignment order.
 class RegAllocBase {
-  virtual void anchor();
 protected:
   const TargetRegisterInfo *TRI;
   MachineRegisterInfo *MRI;