--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/Target/NVPTX/NVPTXFrameLowering.cpp	Thu Dec 12 13:56:28 2013 +0900
@@ -0,0 +1,73 @@
+//=======- NVPTXFrameLowering.cpp - NVPTX Frame Information ---*- C++ -*-=====//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the NVPTX implementation of TargetFrameLowering class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "NVPTXFrameLowering.h"
+#include "NVPTX.h"
+#include "NVPTXRegisterInfo.h"
+#include "NVPTXSubtarget.h"
+#include "NVPTXTargetMachine.h"
+#include "llvm/ADT/BitVector.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/MC/MachineLocation.h"
+#include "llvm/Target/TargetInstrInfo.h"
+
+using namespace llvm;
+
+bool NVPTXFrameLowering::hasFP(const MachineFunction &MF) const { return true; }
+
+void NVPTXFrameLowering::emitPrologue(MachineFunction &MF) const {
+  if (MF.getFrameInfo()->hasStackObjects()) {
+    MachineBasicBlock &MBB = MF.front();
+    // Insert "mov.u32 %SP, %Depot"
+    MachineBasicBlock::iterator MBBI = MBB.begin();
+    // This instruction really occurs before first instruction
+    // in the BB, so giving it no debug location.
+    DebugLoc dl = DebugLoc();
+
+    MachineRegisterInfo &MRI = MF.getRegInfo();
+
+    // mov %SPL, %depot;
+    // cvta.local %SP, %SPL;
+    if (is64bit) {
+      unsigned LocalReg = MRI.createVirtualRegister(&NVPTX::Int64RegsRegClass);
+      MachineInstr *MI = BuildMI(
+          MBB, MBBI, dl, tm.getInstrInfo()->get(NVPTX::cvta_local_yes_64),
+          NVPTX::VRFrame).addReg(LocalReg);
+      BuildMI(MBB, MI, dl, tm.getInstrInfo()->get(NVPTX::MOV_DEPOT_ADDR_64),
+              LocalReg).addImm(MF.getFunctionNumber());
+    } else {
+      unsigned LocalReg = MRI.createVirtualRegister(&NVPTX::Int32RegsRegClass);
+      MachineInstr *MI = BuildMI(
+          MBB, MBBI, dl, tm.getInstrInfo()->get(NVPTX::cvta_local_yes),
+          NVPTX::VRFrame).addReg(LocalReg);
+      BuildMI(MBB, MI, dl, tm.getInstrInfo()->get(NVPTX::MOV_DEPOT_ADDR),
+              LocalReg).addImm(MF.getFunctionNumber());
+    }
+  }
+}
+
+void NVPTXFrameLowering::emitEpilogue(MachineFunction &MF,
+                                      MachineBasicBlock &MBB) const {}
+
+// This function eliminates ADJCALLSTACKDOWN,
+// ADJCALLSTACKUP pseudo instructions
+void NVPTXFrameLowering::eliminateCallFramePseudoInstr(
+    MachineFunction &MF, MachineBasicBlock &MBB,
+    MachineBasicBlock::iterator I) const {
+  // Simply discard ADJCALLSTACKDOWN,
+  // ADJCALLSTACKUP instructions.
+  MBB.erase(I);
+}