source: src/ControlStruct/LabelFixer.h @ 7a15b7e

//
// 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 : Mon Jan 31 22:28:04 2022
// Update Count     : 35
//

#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: //