AMDGPU: Delete more dead code

Remove dead code from r600 intrinsic removal.
Remove unset members, rename StackSize to be less ambiguous.

llvm-svn: 276436
diff --git a/llvm/lib/Target/AMDGPU/R600MachineFunctionInfo.h b/llvm/lib/Target/AMDGPU/R600MachineFunctionInfo.h
index 04a4436..29ac092 100644
--- a/llvm/lib/Target/AMDGPU/R600MachineFunctionInfo.h
+++ b/llvm/lib/Target/AMDGPU/R600MachineFunctionInfo.h
@@ -14,18 +14,13 @@
 #define LLVM_LIB_TARGET_AMDGPU_R600MACHINEFUNCTIONINFO_H
 
 #include "AMDGPUMachineFunction.h"
-#include "llvm/CodeGen/SelectionDAG.h"
-#include <vector>
 
 namespace llvm {
 
 class R600MachineFunctionInfo final : public AMDGPUMachineFunction {
-  void anchor() override;
 public:
   R600MachineFunctionInfo(const MachineFunction &MF);
-  SmallVector<unsigned, 4> LiveOuts;
-  std::vector<unsigned> IndirectRegs;
-  unsigned StackSize;
+  unsigned CFStackSize;
 };
 
 } // End llvm namespace