PackReuse.h

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//===- PackReuse.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 pack de-duplication pass.
//
 
#ifndef LLVM_TRANSFORMS_VECTORIZE_SANDBOXVECTORIZER_PASSES_PACKREUSE_H
#define LLVM_TRANSFORMS_VECTORIZE_SANDBOXVECTORIZER_PASSES_PACKREUSE_H
 
#include "llvm/ADT/StringRef.h"
#include "llvm/SandboxIR/Pass.h"
#include "llvm/SandboxIR/Region.h"
 
namespace llvm::sandboxir {
 
/// This pass aims at de-duplicating packs, i.e., try to reuse already existing
/// pack patterns instead of keeping both.
/// This is useful because even though the duplicates will most probably be
/// optimized away by future passes, their added cost can make vectorization
/// more conservative than it should be.
class LLVM_ABI PackReuse final : public RegionPass {
  bool Change = false;
 
public:
  PackReuse(StringRef AuxArg) : RegionPass("pack-reuse") {
    assert(AuxArg.empty() && "This pass ignores aux arg!");
  }
  bool runOnRegion(Region &Rgn, const Analyses &A) final;
};
 
} // namespace llvm::sandboxir
 
#endif // LLVM_TRANSFORMS_VECTORIZE_SANDBOXVECTORIZER_PASSES_PACKREUSE_H