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Current Path: /usr/src/contrib/llvm-project/llvm/lib/Target/BPF

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

📁 ..
📁 AsmParser
📄 BPF.h(1.33 KB)
📄 BPF.td(1.63 KB)
📄 BPFAbstractMemberAccess.cpp(33.35 KB)
📄 BPFAsmPrinter.cpp(5.11 KB)
📄 BPFCORE.h(1.16 KB)
📄 BPFCallingConv.td(1.79 KB)
📄 BPFFrameLowering.cpp(1.49 KB)
📄 BPFFrameLowering.h(1.46 KB)
📄 BPFISelDAGToDAG.cpp(16.73 KB)
📄 BPFISelLowering.cpp(28.04 KB)
📄 BPFISelLowering.h(5.33 KB)
📄 BPFInstrFormats.td(2.81 KB)
📄 BPFInstrInfo.cpp(8.23 KB)
📄 BPFInstrInfo.h(2.43 KB)
📄 BPFInstrInfo.td(30.55 KB)
📄 BPFMCInstLower.cpp(2.62 KB)
📄 BPFMCInstLower.h(1.17 KB)
📄 BPFMIChecking.cpp(6.54 KB)
📄 BPFMIPeephole.cpp(15.45 KB)
📄 BPFMISimplifyPatchable.cpp(10.86 KB)
📄 BPFPreserveDIType.cpp(3.93 KB)
📄 BPFRegisterInfo.cpp(3.96 KB)
📄 BPFRegisterInfo.h(1.23 KB)
📄 BPFRegisterInfo.td(1.51 KB)
📄 BPFSelectionDAGInfo.cpp(1.63 KB)
📄 BPFSelectionDAGInfo.h(1.24 KB)
📄 BPFSubtarget.cpp(1.84 KB)
📄 BPFSubtarget.h(2.83 KB)
📄 BPFTargetMachine.cpp(4.43 KB)
📄 BPFTargetMachine.h(1.41 KB)
📄 BTF.def(1015 B)
📄 BTF.h(8.27 KB)
📄 BTFDebug.cpp(41.2 KB)
📄 BTFDebug.h(11.66 KB)
📁 Disassembler
📁 MCTargetDesc
📁 TargetInfo

Editing: BPFTargetMachine.cpp

//===-- BPFTargetMachine.cpp - Define TargetMachine for BPF ---------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Implements the info about BPF target spec.
//
//===----------------------------------------------------------------------===//

#include "BPFTargetMachine.h"
#include "BPF.h"
#include "MCTargetDesc/BPFMCAsmInfo.h"
#include "TargetInfo/BPFTargetInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/CodeGen/TargetPassConfig.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Target/TargetOptions.h"
using namespace llvm;

static cl::
opt<bool> DisableMIPeephole("disable-bpf-peephole", cl::Hidden,
                            cl::desc("Disable machine peepholes for BPF"));

extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeBPFTarget() {
  // Register the target.
  RegisterTargetMachine<BPFTargetMachine> X(getTheBPFleTarget());
  RegisterTargetMachine<BPFTargetMachine> Y(getTheBPFbeTarget());
  RegisterTargetMachine<BPFTargetMachine> Z(getTheBPFTarget());

PassRegistry &PR = *PassRegistry::getPassRegistry();
  initializeBPFAbstractMemberAccessPass(PR);
  initializeBPFPreserveDITypePass(PR);
  initializeBPFMIPeepholePass(PR);
  initializeBPFMIPeepholeTruncElimPass(PR);
}

// DataLayout: little or big endian
static std::string computeDataLayout(const Triple &TT) {
  if (TT.getArch() == Triple::bpfeb)
    return "E-m:e-p:64:64-i64:64-i128:128-n32:64-S128";
  else
    return "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128";
}

static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
  if (!RM.hasValue())
    return Reloc::PIC_;
  return *RM;
}

BPFTargetMachine::BPFTargetMachine(const Target &T, const Triple &TT,
                                   StringRef CPU, StringRef FS,
                                   const TargetOptions &Options,
                                   Optional<Reloc::Model> RM,
                                   Optional<CodeModel::Model> CM,
                                   CodeGenOpt::Level OL, bool JIT)
    : LLVMTargetMachine(T, computeDataLayout(TT), TT, CPU, FS, Options,
                        getEffectiveRelocModel(RM),
                        getEffectiveCodeModel(CM, CodeModel::Small), OL),
      TLOF(std::make_unique<TargetLoweringObjectFileELF>()),
      Subtarget(TT, std::string(CPU), std::string(FS), *this) {
  initAsmInfo();

BPFMCAsmInfo *MAI =
      static_cast<BPFMCAsmInfo *>(const_cast<MCAsmInfo *>(AsmInfo.get()));
  MAI->setDwarfUsesRelocationsAcrossSections(!Subtarget.getUseDwarfRIS());
}

namespace {
// BPF Code Generator Pass Configuration Options.
class BPFPassConfig : public TargetPassConfig {
public:
  BPFPassConfig(BPFTargetMachine &TM, PassManagerBase &PM)
      : TargetPassConfig(TM, PM) {}

BPFTargetMachine &getBPFTargetMachine() const {
    return getTM<BPFTargetMachine>();
  }

void addIRPasses() override;
  bool addInstSelector() override;
  void addMachineSSAOptimization() override;
  void addPreEmitPass() override;
};
}

TargetPassConfig *BPFTargetMachine::createPassConfig(PassManagerBase &PM) {
  return new BPFPassConfig(*this, PM);
}

void BPFPassConfig::addIRPasses() {

addPass(createBPFAbstractMemberAccess(&getBPFTargetMachine()));
  addPass(createBPFPreserveDIType());

TargetPassConfig::addIRPasses();
}

// Install an instruction selector pass using
// the ISelDag to gen BPF code.
bool BPFPassConfig::addInstSelector() {
  addPass(createBPFISelDag(getBPFTargetMachine()));

return false;
}

void BPFPassConfig::addMachineSSAOptimization() {
  addPass(createBPFMISimplifyPatchablePass());

// The default implementation must be called first as we want eBPF
  // Peephole ran at last.
  TargetPassConfig::addMachineSSAOptimization();

const BPFSubtarget *Subtarget = getBPFTargetMachine().getSubtargetImpl();
  if (!DisableMIPeephole) {
    if (Subtarget->getHasAlu32())
      addPass(createBPFMIPeepholePass());
    addPass(createBPFMIPeepholeTruncElimPass());
  }
}

void BPFPassConfig::addPreEmitPass() {
  addPass(createBPFMIPreEmitCheckingPass());
  if (getOptLevel() != CodeGenOpt::None)
    if (!DisableMIPeephole)
      addPass(createBPFMIPreEmitPeepholePass());
}

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Editing: BPFTargetMachine.cpp

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