transformersaturation.h
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	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* File: transformersaturation.h
	* Author: pgess <v.melnychenko@xreate.org>
	*
	* Created on March 25, 2017, 9:59 PM
	*/

	#ifndef TRANSFORMERSATURATION_H
	#define TRANSFORMERSATURATION_H

	#include "transformations.h"

	namespace xreate { namespace compilation {

	class TransformerSaturation: public Transformer{
	public:
	TransformerSaturation(llvm::BasicBlock* allocationBlock, TransformationsManager* manager);
	~TransformerSaturation();

	llvm::Value* transform(const Expression& expression, llvm::Value* raw, const Context& ctx) override;

	void processBreak(const Context& ctx);

	void allocateFlag(const Context& ctx);
	bool insertSaturationChecks(llvm::BasicBlock* blockContinue, llvm::BasicBlock* blockExit, const Context& ctx);

	private:
	TransformationsManager* man;
	TransformerSaturation* oldInstance = nullptr;

	llvm::BasicBlock* blockAllocation;

	llvm::Value* constTrue;
	llvm::Value* constFalse;
	llvm::Value* flagSaturation = nullptr;
	};

	template <>
	struct TransformerInfo<TransformerSaturation> {
	static const unsigned int id = 0;
	};

	} }

	#endif /* TRANSFORMERSATURATION_H */