NullPass.h

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//===- NullPass.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
//
//===----------------------------------------------------------------------===//
//
// A null region pass that does nothing. Used for testing.
//
 
#ifndef LLVM_TRANSFORMS_VECTORIZE_SANDBOXVECTORIZER_PASSES_NULLPASS_H
#define LLVM_TRANSFORMS_VECTORIZE_SANDBOXVECTORIZER_PASSES_NULLPASS_H
 
#include "llvm/SandboxIR/Pass.h"
 
namespace llvm::sandboxir {
 
class Region;
 
/// A Region pass that does nothing, for use as a placeholder in tests.
/// It can also echo the AuxArg passed to it by the pass builder, which is used
/// for AuxArg testing.
class NullPass final : public RegionPass {
  StringRef AuxArg;
 
public:
  NullPass(StringRef AuxArg) : RegionPass("null"), AuxArg(AuxArg) {}
  bool runOnRegion(Region &R, const Analyses &A) final { return false; }
  StringRef getAuxArg() const { return AuxArg; }
};
 
} // namespace llvm::sandboxir
 
#endif // LLVM_TRANSFORMS_VECTORIZE_SANDBOXVECTORIZER_PASSES_NULLPASS_H