//
// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// LabelFixer.h --
//
// Author           : Rodolfo G. Esteves
// Created On       : Mon May 18 07:44:20 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Sat Jul 22 09:17:24 2017
// Update Count     : 34
//

#pragma once

#include <list>                    // for list
#include <map>                     // for map

#include "Common/PassVisitor.h"
#include "Common/SemanticError.h"  // for SemanticError
#include "SynTree/Label.h"         // for Label
#include "SynTree/Visitor.h"       // for Visitor
#include "SynTree/SynTree.h"       // for Visitor Nodes

namespace ControlStruct {
	/// normalizes label definitions and generates multi-level exit labels
	class LabelGenerator;

	class LabelFixer final : public WithGuards {
	  public:
		LabelFixer( LabelGenerator *gen = 0 );

		std::map < Label, Statement * > *resolveJumps() throw ( SemanticErrorException );

		// Declarations
		void previsit( FunctionDecl *functionDecl );
		void postvisit( FunctionDecl *functionDecl );

		// Statements
		void previsit( Statement *stmt );
		void previsit( BranchStmt *branchStmt );

		// Expressions
		void previsit( LabelAddressExpr *addrExpr );

		Label setLabelsDef( std::list< Label > &, Statement *definition );
		template< typename UsageNode >
		void setLabelsUsg( Label, UsageNode *usage = 0 );

	  private:
		class Entry {
			public:
			Entry( Statement *to ) : definition( to ) {}
			bool defined() { return ( definition != 0 ); }
			bool insideLoop();

			Label get_label() const { return label; }
			void set_label( Label lab ) { label = lab; }

			Statement *get_definition() const { return definition; }
			void set_definition( Statement *def ) { definition = def; }

		  private:
			Label label;
			Statement *definition;
		};

		std::map < Label, Entry *> labelTable;
		LabelGenerator *generator;
	};
} // namespace ControlStruct

// Local Variables: //
// tab-width: 4 //
// mode: c++ //
// compile-command: "make install" //
// End: //