VaKeR CYBER ARMY
Logo of a company Server : Apache/2.4.41 (Ubuntu)
System : Linux absol.cf 5.4.0-198-generic #218-Ubuntu SMP Fri Sep 27 20:18:53 UTC 2024 x86_64
User : www-data ( 33)
PHP Version : 7.4.33
Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare,
Directory :  /proc/thread-self/root/usr/lib/llvm-10/build/include/llvm/CodeGen/

Upload File :
current_dir [ Writeable ] document_root [ Writeable ]

 

Current File : //proc/thread-self/root/usr/lib/llvm-10/build/include/llvm/CodeGen/PseudoSourceValue.h
//===-- llvm/CodeGen/PseudoSourceValue.h ------------------------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file contains the declaration of the PseudoSourceValue class.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_PSEUDOSOURCEVALUE_H
#define LLVM_CODEGEN_PSEUDOSOURCEVALUE_H

#include "llvm/ADT/StringMap.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/ValueMap.h"
#include <map>

namespace llvm {

class MachineFrameInfo;
class MachineMemOperand;
class MIRFormatter;
class raw_ostream;
class TargetInstrInfo;

raw_ostream &operator<<(raw_ostream &OS, const MachineMemOperand &MMO);
class PseudoSourceValue;
raw_ostream &operator<<(raw_ostream &OS, const PseudoSourceValue* PSV);

/// Special value supplied for machine level alias analysis. It indicates that
/// a memory access references the functions stack frame (e.g., a spill slot),
/// below the stack frame (e.g., argument space), or constant pool.
class PseudoSourceValue {
public:
  enum PSVKind : unsigned {
    Stack,
    GOT,
    JumpTable,
    ConstantPool,
    FixedStack,
    GlobalValueCallEntry,
    ExternalSymbolCallEntry,
    TargetCustom
  };

private:
  unsigned Kind;
  unsigned AddressSpace;
  friend raw_ostream &llvm::operator<<(raw_ostream &OS,
                                       const PseudoSourceValue* PSV);

  friend class MachineMemOperand; // For printCustom().
  friend class MIRFormatter;      // For printCustom().

  /// Implement printing for PseudoSourceValue. This is called from
  /// Value::print or Value's operator<<.
  virtual void printCustom(raw_ostream &O) const;

public:
  explicit PseudoSourceValue(unsigned Kind, const TargetInstrInfo &TII);

  virtual ~PseudoSourceValue();

  unsigned kind() const { return Kind; }

  bool isStack() const { return Kind == Stack; }
  bool isGOT() const { return Kind == GOT; }
  bool isConstantPool() const { return Kind == ConstantPool; }
  bool isJumpTable() const { return Kind == JumpTable; }

  unsigned getAddressSpace() const { return AddressSpace; }

  unsigned getTargetCustom() const {
    return (Kind >= TargetCustom) ? ((Kind+1) - TargetCustom) : 0;
  }

  /// Test whether the memory pointed to by this PseudoSourceValue has a
  /// constant value.
  virtual bool isConstant(const MachineFrameInfo *) const;

  /// Test whether the memory pointed to by this PseudoSourceValue may also be
  /// pointed to by an LLVM IR Value.
  virtual bool isAliased(const MachineFrameInfo *) const;

  /// Return true if the memory pointed to by this PseudoSourceValue can ever
  /// alias an LLVM IR Value.
  virtual bool mayAlias(const MachineFrameInfo *) const;
};

/// A specialized PseudoSourceValue for holding FixedStack values, which must
/// include a frame index.
class FixedStackPseudoSourceValue : public PseudoSourceValue {
  const int FI;

public:
  explicit FixedStackPseudoSourceValue(int FI, const TargetInstrInfo &TII)
      : PseudoSourceValue(FixedStack, TII), FI(FI) {}

  static bool classof(const PseudoSourceValue *V) {
    return V->kind() == FixedStack;
  }

  bool isConstant(const MachineFrameInfo *MFI) const override;

  bool isAliased(const MachineFrameInfo *MFI) const override;

  bool mayAlias(const MachineFrameInfo *) const override;

  void printCustom(raw_ostream &OS) const override;

  int getFrameIndex() const { return FI; }
};

class CallEntryPseudoSourceValue : public PseudoSourceValue {
protected:
  CallEntryPseudoSourceValue(unsigned Kind, const TargetInstrInfo &TII);

public:
  bool isConstant(const MachineFrameInfo *) const override;
  bool isAliased(const MachineFrameInfo *) const override;
  bool mayAlias(const MachineFrameInfo *) const override;
};

/// A specialized pseudo source value for holding GlobalValue values.
class GlobalValuePseudoSourceValue : public CallEntryPseudoSourceValue {
  const GlobalValue *GV;

public:
  GlobalValuePseudoSourceValue(const GlobalValue *GV,
                               const TargetInstrInfo &TII);

  static bool classof(const PseudoSourceValue *V) {
    return V->kind() == GlobalValueCallEntry;
  }

  const GlobalValue *getValue() const { return GV; }
};

/// A specialized pseudo source value for holding external symbol values.
class ExternalSymbolPseudoSourceValue : public CallEntryPseudoSourceValue {
  const char *ES;

public:
  ExternalSymbolPseudoSourceValue(const char *ES, const TargetInstrInfo &TII);

  static bool classof(const PseudoSourceValue *V) {
    return V->kind() == ExternalSymbolCallEntry;
  }

  const char *getSymbol() const { return ES; }
};

/// Manages creation of pseudo source values.
class PseudoSourceValueManager {
  const TargetInstrInfo &TII;
  const PseudoSourceValue StackPSV, GOTPSV, JumpTablePSV, ConstantPoolPSV;
  std::map<int, std::unique_ptr<FixedStackPseudoSourceValue>> FSValues;
  StringMap<std::unique_ptr<const ExternalSymbolPseudoSourceValue>>
      ExternalCallEntries;
  ValueMap<const GlobalValue *,
           std::unique_ptr<const GlobalValuePseudoSourceValue>>
      GlobalCallEntries;

public:
  PseudoSourceValueManager(const TargetInstrInfo &TII);

  /// Return a pseudo source value referencing the area below the stack frame of
  /// a function, e.g., the argument space.
  const PseudoSourceValue *getStack();

  /// Return a pseudo source value referencing the global offset table
  /// (or something the like).
  const PseudoSourceValue *getGOT();

  /// Return a pseudo source value referencing the constant pool. Since constant
  /// pools are constant, this doesn't need to identify a specific constant
  /// pool entry.
  const PseudoSourceValue *getConstantPool();

  /// Return a pseudo source value referencing a jump table. Since jump tables
  /// are constant, this doesn't need to identify a specific jump table.
  const PseudoSourceValue *getJumpTable();

  /// Return a pseudo source value referencing a fixed stack frame entry,
  /// e.g., a spill slot.
  const PseudoSourceValue *getFixedStack(int FI);

  const PseudoSourceValue *getGlobalValueCallEntry(const GlobalValue *GV);

  const PseudoSourceValue *getExternalSymbolCallEntry(const char *ES);
};

} // end namespace llvm

#endif

VaKeR 2022