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usr / src / contrib / llvm-project / llvm / lib / Target / SystemZ /

📁 ..
📁 AsmParser
📁 Disassembler
📁 MCTargetDesc
📄 README.txt(3.94 KB)
📄 SystemZ.h(8.19 KB)
📄 SystemZ.td(2.86 KB)
📄 SystemZAsmPrinter.cpp(23.49 KB)
📄 SystemZAsmPrinter.h(1.88 KB)
📄 SystemZCallingConv.cpp(710 B)
📄 SystemZCallingConv.h(4.89 KB)
📄 SystemZCallingConv.td(6.99 KB)
📄 SystemZConstantPoolValue.cpp(1.78 KB)
📄 SystemZConstantPoolValue.h(1.75 KB)
📄 SystemZCopyPhysRegs.cpp(3.82 KB)
📄 SystemZElimCompare.cpp(26.21 KB)
📄 SystemZFeatures.td(12.3 KB)
📄 SystemZFrameLowering.cpp(29.88 KB)
📄 SystemZFrameLowering.h(3.02 KB)
📄 SystemZHazardRecognizer.cpp(14.75 KB)
📄 SystemZHazardRecognizer.h(5.86 KB)
📄 SystemZISelDAGToDAG.cpp(68.74 KB)
📄 SystemZISelLowering.cpp(321.22 KB)
📄 SystemZISelLowering.h(28.44 KB)
📄 SystemZInstrBuilder.h(1.63 KB)
📄 SystemZInstrDFP.td(9.3 KB)
📄 SystemZInstrFP.td(26.21 KB)
📄 SystemZInstrFormats.td(182.82 KB)
📄 SystemZInstrHFP.td(9.46 KB)
📄 SystemZInstrInfo.cpp(69.75 KB)
📄 SystemZInstrInfo.h(14.6 KB)
📄 SystemZInstrInfo.td(103.17 KB)
📄 SystemZInstrSystem.td(17.18 KB)
📄 SystemZInstrVector.td(84.36 KB)
📄 SystemZLDCleanup.cpp(4.91 KB)
📄 SystemZLongBranch.cpp(16.04 KB)
📄 SystemZMCInstLower.cpp(3.16 KB)
📄 SystemZMCInstLower.h(1.28 KB)
📄 SystemZMachineFunctionInfo.cpp(508 B)
📄 SystemZMachineFunctionInfo.h(3.77 KB)
📄 SystemZMachineScheduler.cpp(8.76 KB)
📄 SystemZMachineScheduler.h(5.05 KB)
📄 SystemZOperands.td(24.89 KB)
📄 SystemZOperators.td(48.97 KB)
📄 SystemZPatterns.td(8.52 KB)
📄 SystemZPostRewrite.cpp(10.33 KB)
📄 SystemZProcessors.td(1.78 KB)
📄 SystemZRegisterInfo.cpp(16.27 KB)
📄 SystemZRegisterInfo.h(3.52 KB)
📄 SystemZRegisterInfo.td(12.04 KB)
📄 SystemZSchedule.td(2.1 KB)
📄 SystemZScheduleZ13.td(72.43 KB)
📄 SystemZScheduleZ14.td(78.06 KB)
📄 SystemZScheduleZ15.td(80.69 KB)
📄 SystemZScheduleZ196.td(55.68 KB)
📄 SystemZScheduleZEC12.td(57.44 KB)
📄 SystemZSelectionDAGInfo.cpp(12.92 KB)
📄 SystemZSelectionDAGInfo.h(3.15 KB)
📄 SystemZShortenInst.cpp(12 KB)
📄 SystemZSubtarget.cpp(3.67 KB)
📄 SystemZSubtarget.h(9.14 KB)
📄 SystemZTDC.cpp(13.52 KB)
📄 SystemZTargetMachine.cpp(11.58 KB)
📄 SystemZTargetMachine.h(2.09 KB)
📄 SystemZTargetTransformInfo.cpp(43.51 KB)
📄 SystemZTargetTransformInfo.h(4.88 KB)
📁 TargetInfo

Editing: SystemZCopyPhysRegs.cpp

//===---------- SystemZPhysRegCopy.cpp - Handle phys reg copies -----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This pass makes sure that a COPY of a physical register will be
// implementable after register allocation in copyPhysReg() (this could be
// done in EmitInstrWithCustomInserter() instead if COPY instructions would
// be passed to it).
//
//===----------------------------------------------------------------------===//

#include "SystemZMachineFunctionInfo.h"
#include "SystemZTargetMachine.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/Target/TargetMachine.h"

using namespace llvm;

#define SYSTEMZ_COPYPHYSREGS_NAME "SystemZ Copy Physregs"

namespace llvm {
  void initializeSystemZCopyPhysRegsPass(PassRegistry&);
}

namespace {

class SystemZCopyPhysRegs : public MachineFunctionPass {
public:
  static char ID;
  SystemZCopyPhysRegs()
    : MachineFunctionPass(ID), TII(nullptr), MRI(nullptr) {
    initializeSystemZCopyPhysRegsPass(*PassRegistry::getPassRegistry());
  }

StringRef getPassName() const override { return SYSTEMZ_COPYPHYSREGS_NAME; }

bool runOnMachineFunction(MachineFunction &MF) override;
  void getAnalysisUsage(AnalysisUsage &AU) const override;

private:

bool visitMBB(MachineBasicBlock &MBB);

const SystemZInstrInfo *TII;
  MachineRegisterInfo *MRI;
};

char SystemZCopyPhysRegs::ID = 0;

} // end anonymous namespace

INITIALIZE_PASS(SystemZCopyPhysRegs, "systemz-copy-physregs",
                SYSTEMZ_COPYPHYSREGS_NAME, false, false)

FunctionPass *llvm::createSystemZCopyPhysRegsPass(SystemZTargetMachine &TM) {
  return new SystemZCopyPhysRegs();
}

void SystemZCopyPhysRegs::getAnalysisUsage(AnalysisUsage &AU) const {
  AU.setPreservesCFG();
  MachineFunctionPass::getAnalysisUsage(AU);
}

bool SystemZCopyPhysRegs::visitMBB(MachineBasicBlock &MBB) {
  bool Modified = false;

// Certain special registers can only be copied from a subset of the
  // default register class of the type. It is therefore necessary to create
  // the target copy instructions before regalloc instead of in copyPhysReg().
  for (MachineBasicBlock::iterator MBBI = MBB.begin(), E = MBB.end();
       MBBI != E; ) {
    MachineInstr *MI = &*MBBI++;
    if (!MI->isCopy())
      continue;

DebugLoc DL = MI->getDebugLoc();
    Register SrcReg = MI->getOperand(1).getReg();
    Register DstReg = MI->getOperand(0).getReg();
    if (DstReg.isVirtual() &&
        (SrcReg == SystemZ::CC || SystemZ::AR32BitRegClass.contains(SrcReg))) {
      Register Tmp = MRI->createVirtualRegister(&SystemZ::GR32BitRegClass);
      if (SrcReg == SystemZ::CC)
        BuildMI(MBB, MI, DL, TII->get(SystemZ::IPM), Tmp);
      else
        BuildMI(MBB, MI, DL, TII->get(SystemZ::EAR), Tmp).addReg(SrcReg);
      MI->getOperand(1).setReg(Tmp);
      Modified = true;
    }
    else if (SrcReg.isVirtual() &&
             SystemZ::AR32BitRegClass.contains(DstReg)) {
      Register Tmp = MRI->createVirtualRegister(&SystemZ::GR32BitRegClass);
      MI->getOperand(0).setReg(Tmp);
      BuildMI(MBB, MBBI, DL, TII->get(SystemZ::SAR), DstReg).addReg(Tmp);
      Modified = true;
    }
  }

return Modified;
}

bool SystemZCopyPhysRegs::runOnMachineFunction(MachineFunction &F) {
  TII = static_cast<const SystemZInstrInfo *>(F.getSubtarget().getInstrInfo());
  MRI = &F.getRegInfo();

bool Modified = false;
  for (auto &MBB : F)
    Modified |= visitMBB(MBB);

return Modified;
}

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Editing: SystemZCopyPhysRegs.cpp

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