1 files changed, 79 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/NVPTX/NVPTXFrameLowering.cpp b/contrib/llvm/lib/Target/NVPTX/NVPTXFrameLowering.cpp
new file mode 100644
index 0000000..9b34aef
--- /dev/null
+++ b/contrib/llvm/lib/Target/NVPTX/NVPTXFrameLowering.cpp
@@ -0,0 +1,79 @@
+//=======- 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;
+
+NVPTXFrameLowering::NVPTXFrameLowering()
+    : TargetFrameLowering(TargetFrameLowering::StackGrowsUp, 8, 0) {}
+
+bool NVPTXFrameLowering::hasFP(const MachineFunction &MF) const { return true; }
+
+void NVPTXFrameLowering::emitPrologue(MachineFunction &MF,
+                                      MachineBasicBlock &MBB) const {
+  if (MF.getFrameInfo()->hasStackObjects()) {
+    assert(&MF.front() == &MBB && "Shrink-wrapping not yet supported");
+    MachineInstr *MI = MBB.begin();
+    MachineRegisterInfo &MR = MF.getRegInfo();
+
+    // This instruction really occurs before first instruction
+    // in the BB, so giving it no debug location.
+    DebugLoc dl = DebugLoc();
+
+    // Emits
+    //   mov %SPL, %depot;
+    //   cvta.local %SP, %SPL;
+    // for local address accesses in MF.
+    bool Is64Bit =
+        static_cast<const NVPTXTargetMachine &>(MF.getTarget()).is64Bit();
+    unsigned CvtaLocalOpcode =
+        (Is64Bit ? NVPTX::cvta_local_yes_64 : NVPTX::cvta_local_yes);
+    unsigned MovDepotOpcode =
+        (Is64Bit ? NVPTX::MOV_DEPOT_ADDR_64 : NVPTX::MOV_DEPOT_ADDR);
+    if (!MR.use_empty(NVPTX::VRFrame)) {
+      // If %SP is not used, do not bother emitting "cvta.local %SP, %SPL".
+      MI = BuildMI(MBB, MI, dl,
+                   MF.getSubtarget().getInstrInfo()->get(CvtaLocalOpcode),
+                   NVPTX::VRFrame)
+               .addReg(NVPTX::VRFrameLocal);
+    }
+    BuildMI(MBB, MI, dl, MF.getSubtarget().getInstrInfo()->get(MovDepotOpcode),
+            NVPTX::VRFrameLocal)
+        .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);
+}