HexagonAsmPrinter.h

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//===- HexagonAsmPrinter.h - Print machine code -----------------*- 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
//
//===----------------------------------------------------------------------===//
//
// Hexagon Assembly printer class.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_LIB_TARGET_HEXAGON_HEXAGONASMPRINTER_H
#define LLVM_LIB_TARGET_HEXAGON_HEXAGONASMPRINTER_H
 
#include "HexagonSubtarget.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/MC/MCStreamer.h"
#include <utility>
 
namespace llvm {
 
class MachineInstr;
class MCInst;
class raw_ostream;
class TargetMachine;
 
  class HexagonAsmPrinter : public AsmPrinter {
    const HexagonSubtarget *Subtarget = nullptr;
 
    void emitAttributes();
 
  public:
    explicit HexagonAsmPrinter(TargetMachine &TM,
                               std::unique_ptr<MCStreamer> Streamer)
      : AsmPrinter(TM, std::move(Streamer)) {}
 
    bool runOnMachineFunction(MachineFunction &Fn) override {
      Subtarget = &Fn.getSubtarget<HexagonSubtarget>();
      const bool Modified = AsmPrinter::runOnMachineFunction(Fn);
      // Emit the XRay table for this function.
      emitXRayTable();
 
      return Modified;
    }
 
    StringRef getPassName() const override {
      return "Hexagon Assembly Printer";
    }
 
    bool isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB)
          const override;
 
    void emitInstruction(const MachineInstr *MI) override;
 
    //===------------------------------------------------------------------===//
    // XRay implementation
    //===------------------------------------------------------------------===//
    // XRay-specific lowering for Hexagon.
    void LowerPATCHABLE_FUNCTION_ENTER(const MachineInstr &MI);
    void LowerPATCHABLE_FUNCTION_EXIT(const MachineInstr &MI);
    void LowerPATCHABLE_TAIL_CALL(const MachineInstr &MI);
    void EmitSled(const MachineInstr &MI, SledKind Kind);
 
    void HexagonProcessInstruction(MCInst &Inst, const MachineInstr &MBB);
 
    void printOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O);
    bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
                         const char *ExtraCode, raw_ostream &OS) override;
    bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
                               const char *ExtraCode, raw_ostream &OS) override;
    void emitStartOfAsmFile(Module &M) override;
    void emitEndOfAsmFile(Module &M) override;
  };
 
} // end namespace llvm
 
#endif // LLVM_LIB_TARGET_HEXAGON_HEXAGONASMPRINTER_H