NVPTXFrameLowering.cpp [plain text]
#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();
DebugLoc dl = DebugLoc();
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)) {
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 {}
void NVPTXFrameLowering::eliminateCallFramePseudoInstr(
MachineFunction &MF, MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const {
MBB.erase(I);
}