SystemZTargetStreamer.h

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//=- SystemZTargetStreamer.h - SystemZ Target Streamer ----------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZTARGETSTREAMER_H
#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZTARGETSTREAMER_H
 
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSectionGOFF.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCSymbolGOFF.h"
#include "llvm/Support/FormattedStream.h"
#include <map>
#include <utility>
 
namespace llvm {
class MCGOFFStreamer;
class SystemZHLASMAsmStreamer;
 
class SystemZTargetStreamer : public MCTargetStreamer {
public:
  SystemZTargetStreamer(MCStreamer &S) : MCTargetStreamer(S) {}
 
  typedef std::pair<MCInst, const MCSubtargetInfo *> MCInstSTIPair;
  struct CmpMCInst {
    bool operator()(const MCInstSTIPair &MCI_STI_A,
                    const MCInstSTIPair &MCI_STI_B) const {
      if (MCI_STI_A.second != MCI_STI_B.second)
        return uintptr_t(MCI_STI_A.second) < uintptr_t(MCI_STI_B.second);
      const MCInst &A = MCI_STI_A.first;
      const MCInst &B = MCI_STI_B.first;
      assert(A.getNumOperands() == B.getNumOperands() &&
             A.getNumOperands() == 5 && A.getOperand(2).getImm() == 1 &&
             B.getOperand(2).getImm() == 1 && "Unexpected EXRL target MCInst");
      if (A.getOpcode() != B.getOpcode())
        return A.getOpcode() < B.getOpcode();
      if (A.getOperand(0).getReg() != B.getOperand(0).getReg())
        return A.getOperand(0).getReg() < B.getOperand(0).getReg();
      if (A.getOperand(1).getImm() != B.getOperand(1).getImm())
        return A.getOperand(1).getImm() < B.getOperand(1).getImm();
      if (A.getOperand(3).getReg() != B.getOperand(3).getReg())
        return A.getOperand(3).getReg() < B.getOperand(3).getReg();
      if (A.getOperand(4).getImm() != B.getOperand(4).getImm())
        return A.getOperand(4).getImm() < B.getOperand(4).getImm();
      return false;
    }
  };
  typedef std::map<MCInstSTIPair, MCSymbol *, CmpMCInst> EXRLT2SymMap;
  EXRLT2SymMap EXRLTargets2Sym;
 
  void emitConstantPools() override;
 
  virtual void emitMachine(StringRef CPUOrCommand) {};
};
 
class SystemZTargetzOSStreamer : public SystemZTargetStreamer {
public:
  /// Information about a single function needed to emit a PPA1 block.
  struct PPA1Info {
    StringRef Name;
    MCSymbol *Fn = nullptr;          // Symbol marking function begin.
    MCSymbol *FnEnd = nullptr;       // Symbol marking function end.
    MCSymbol *PPA1 = nullptr;        // Symbol marking PPA1 begin.
    MCSymbol *EPMarker = nullptr;    // Symbol marking entry point.
    MCSymbol *EndOfProlog = nullptr; // Symbol marking the end of the prolog.
    MCSymbol *StackUpdate = nullptr; // Symbol marking the stack updating instr.
    int64_t OffsetFPR = 0;
    int64_t OffsetVR = 0;
    uint64_t CallFrameSize = 0;
    uint64_t PersonalityADADisp = 0; // ADA displacement for personality func.
    uint64_t GCCEHADADisp = 0;       // ADA displacement for GCCEH symbol.
    unsigned SizeOfFnParams = 0;
    uint32_t FrameAndFPROffset;
    uint32_t FrameAndVROffset;
    uint16_t SavedGPRMask = 0;
    uint16_t SavedFPRMask = 0;
    uint8_t SavedVRMask = 0;
    uint8_t FrameReg = 0;
    uint8_t AllocaReg = 0;
    bool IsVarArg = false;
    bool HasStackProtector = false;
  };
 
  SmallVector<PPA1Info, 0> DeferredPPA1;
 
  MCSymbol *PPA2Sym = nullptr;
 
  SystemZTargetzOSStreamer(MCStreamer &S) : SystemZTargetStreamer(S) {}
 
  void emitConstantPools() override;
 
  void emitExternalName(MCSymbol *Sym, StringRef Name) {
    static_cast<MCSymbolGOFF *>(Sym)->setExternalName(Name);
  }
  void emitExternalName(MCSection *Sec, StringRef Name) {
    static_cast<MCSectionGOFF *>(Sec)->setExternalName(Name);
  }
  void emitADA(MCSymbol *Sym, MCSection *Section) {
    static_cast<MCSymbolGOFF *>(Sym)->setADA(
        static_cast<MCSectionGOFF *>(Section));
  }
 
  void emitPPA1(PPA1Info &Info);
  virtual const MCExpr *createWordDiffExpr(MCContext &Ctx, const MCSymbol *Hi,
                                           const MCSymbol *Lo) = 0;
};
 
class SystemZTargetGOFFStreamer : public SystemZTargetzOSStreamer {
public:
  SystemZTargetGOFFStreamer(MCStreamer &S) : SystemZTargetzOSStreamer(S) {}
  const MCExpr *createWordDiffExpr(MCContext &Ctx, const MCSymbol *Hi,
                                   const MCSymbol *Lo) override;
};
 
class SystemZTargetHLASMStreamer : public SystemZTargetzOSStreamer {
  formatted_raw_ostream &OS;
 
public:
  SystemZTargetHLASMStreamer(MCStreamer &S, formatted_raw_ostream &OS)
      : SystemZTargetzOSStreamer(S), OS(OS) {}
  SystemZHLASMAsmStreamer &getHLASMStreamer();
  const MCExpr *createWordDiffExpr(MCContext &Ctx, const MCSymbol *Hi,
                                   const MCSymbol *Lo) override;
};
 
class SystemZTargetELFStreamer : public SystemZTargetStreamer {
public:
  SystemZTargetELFStreamer(MCStreamer &S) : SystemZTargetStreamer(S) {}
  void emitMachine(StringRef CPUOrCommand) override {}
};
 
class SystemZTargetGNUStreamer : public SystemZTargetStreamer {
  formatted_raw_ostream &OS;
 
public:
  SystemZTargetGNUStreamer(MCStreamer &S, formatted_raw_ostream &OS)
      : SystemZTargetStreamer(S), OS(OS) {}
  void emitMachine(StringRef CPUOrCommand) override {
    OS << "\t.machine " << CPUOrCommand << "\n";
  }
};
 
} // end namespace llvm
 
#endif // LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZTARGETSTREAMER_H