// Copyright 2017-2019 VMware, Inc.
// SPDX-License-Identifier: BSD-2-Clause
//
// The BSD-2 license (the License) set forth below applies to all parts of the
// Cascade project.  You may not use this file except in compliance with the
// License.
//
// BSD-2 License
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef CASCADE_SRC_VERILOG_TRANSFORM_LOOP_UNROLL_H
#define CASCADE_SRC_VERILOG_TRANSFORM_LOOP_UNROLL_H

#include "verilog/ast/visitors/builder.h"
#include "verilog/ast/visitors/rewriter.h"
#include "verilog/ast/visitors/visitor.h"

namespace cascade {

class LoopUnroll : public Rewriter {
  public:
    LoopUnroll();
    ~LoopUnroll() override = default;

    void run(ModuleDeclaration* md);

  private:
    struct Unroll : public Builder {
      Unroll();
      ~Unroll() override = default;

      Statement* build(const BlockingAssign* ba) override;
      Statement* build(const ForStatement* fs) override;
      Statement* build(const RepeatStatement* rs) override;
      Statement* build(const WhileStatement* ws) override;
    };

    struct Reset : public Visitor {
      Reset();
      ~Reset() override = default;
      void visit(const RegDeclaration* rd) override;
    };

    Statement* rewrite(ForStatement* fs) override;
    Statement* rewrite(RepeatStatement* rs) override;
    Statement* rewrite(WhileStatement* ws) override;

    ModuleDeclaration* md_;
};

} // namespace cascade

#endif


