Pass.h

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//===- Pass.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
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_SANDBOXIR_PASS_H
#define LLVM_SANDBOXIR_PASS_H
 
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
 
namespace llvm {
 
class AAResults;
class ScalarEvolution;
 
namespace sandboxir {
 
class Function;
class Region;
 
class Analyses {
  AAResults *AA = nullptr;
  ScalarEvolution *SE = nullptr;
 
  Analyses() = default;
 
public:
  Analyses(AAResults &AA, ScalarEvolution &SE) : AA(&AA), SE(&SE) {}
 
public:
  AAResults &getAA() const { return *AA; }
  ScalarEvolution &getScalarEvolution() const { return *SE; }
  /// For use by unit tests.
  static Analyses emptyForTesting() { return Analyses(); }
};
 
/// The base class of a Sandbox IR Pass.
class Pass {
protected:
  /// The pass name. This is also used as a command-line flag and should not
  /// contain whitespaces.
  const std::string Name;
 
public:
  /// \p Name can't contain any spaces or start with '-'.
  Pass(StringRef Name) : Name(Name) {
    assert(!Name.contains(' ') &&
           "A pass name should not contain whitespaces!");
    assert(!Name.starts_with('-') && "A pass name should not start with '-'!");
  }
  virtual ~Pass() {}
  /// \Returns the name of the pass.
  StringRef getName() const { return Name; }
#ifndef NDEBUG
  friend raw_ostream &operator<<(raw_ostream &OS, const Pass &Pass) {
    Pass.print(OS);
    return OS;
  }
  virtual void print(raw_ostream &OS) const { OS << Name; }
  LLVM_DUMP_METHOD virtual void dump() const;
#endif
  /// Similar to print() but adds a newline. Used for testing.
  virtual void printPipeline(raw_ostream &OS) const { OS << Name << "\n"; }
};
 
/// A pass that runs on a sandbox::Function.
class FunctionPass : public Pass {
public:
  /// \p Name can't contain any spaces or start with '-'.
  FunctionPass(StringRef Name) : Pass(Name) {}
  /// \Returns true if it modifies \p F.
  virtual bool runOnFunction(Function &F, const Analyses &A) = 0;
};
 
/// A pass that runs on a sandbox::Region.
class RegionPass : public Pass {
public:
  /// \p Name can't contain any spaces or start with '-'.
  RegionPass(StringRef Name) : Pass(Name) {}
  /// \Returns true if it modifies \p R.
  virtual bool runOnRegion(Region &R, const Analyses &A) = 0;
};
 
} // namespace sandboxir
} // namespace llvm
 
#endif // LLVM_SANDBOXIR_PASS_H