/*
 * GenMC -- Generic Model Checking.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you can access it online at
 * http://www.gnu.org/licenses/gpl-3.0.html.
 *
 * Author: Michalis Kokologiannakis <michalis@mpi-sws.org>
 */

#ifndef GENMC_LOOP_UNROLL_PASS_HPP
#define GENMC_LOOP_UNROLL_PASS_HPP

#include "ADT/VSet.hpp"
#include <llvm/Analysis/LoopInfo.h>
#include <llvm/Analysis/LoopPass.h>
#include <llvm/Passes/PassBuilder.h>

using namespace llvm;

class LoopUnrollPass : public PassInfoMixin<LoopUnrollPass> {
public:
	LoopUnrollPass(unsigned int depth, const VSet<std::string> &noUnrollFuns = {})
		: unrollDepth_(depth), noUnroll_(noUnrollFuns)
	{}

	auto run(Loop &L, LoopAnalysisManager &AM, LoopStandardAnalysisResults &AR, LPMUpdater &U)
		-> PreservedAnalyses;

private:
	auto shouldUnroll(llvm::Loop *l) const -> bool
	{
		return !noUnroll_.count((*l->block_begin())->getParent()->getName().str());
	}

	unsigned int unrollDepth_{};
	VSet<std::string> noUnroll_;
};

#endif /* GENMC_LOOP_UNROLL_PASS_HPP */
