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
diff --git a/lib/Target/R600/AMDGPUInstrInfo.cpp b/lib/Target/R600/AMDGPUInstrInfo.cpp
index 3a859cf..1b2e131 100644
--- a/lib/Target/R600/AMDGPUInstrInfo.cpp
+++ b/lib/Target/R600/AMDGPUInstrInfo.cpp
@@ -20,17 +20,13 @@
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
 
-#define GET_INSTRINFO_CTOR_DTOR
+#define GET_INSTRINFO_CTOR
 #define GET_INSTRINFO_NAMED_OPS
 #define GET_INSTRMAP_INFO
 #include "AMDGPUGenInstrInfo.inc"
 
 using namespace llvm;
 
-
-// pin vtable to this file
-void AMDGPUInstrInfo::anchor() {}
-
 AMDGPUInstrInfo::AMDGPUInstrInfo(TargetMachine &tm)
   : AMDGPUGenInstrInfo(-1,-1), RI(tm), TM(tm) { }