void NVPTXFrameLowering::emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const { if (MF.getFrameInfo()->hasStackObjects()) { assert(&MF.front() == &MBB && "Shrink-wrapping not yet supported"); // 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 (static_cast<const NVPTXTargetMachine &>(MF.getTarget()).is64Bit()) { unsigned LocalReg = MRI.createVirtualRegister(&NVPTX::Int64RegsRegClass); MachineInstr *MI = BuildMI(MBB, MBBI, dl, MF.getSubtarget().getInstrInfo()->get( NVPTX::cvta_local_yes_64), NVPTX::VRFrame).addReg(LocalReg); BuildMI(MBB, MI, dl, MF.getSubtarget().getInstrInfo()->get(NVPTX::MOV_DEPOT_ADDR_64), LocalReg).addImm(MF.getFunctionNumber()); } else { unsigned LocalReg = MRI.createVirtualRegister(&NVPTX::Int32RegsRegClass); MachineInstr *MI = BuildMI(MBB, MBBI, dl, MF.getSubtarget().getInstrInfo()->get(NVPTX::cvta_local_yes), NVPTX::VRFrame).addReg(LocalReg); BuildMI(MBB, MI, dl, MF.getSubtarget().getInstrInfo()->get(NVPTX::MOV_DEPOT_ADDR), LocalReg).addImm(MF.getFunctionNumber()); } } }
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()); } }