source: src/GenPoly/ScrubTyVars.cc @ 6c2dc00

//
// 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.
//
// ScrubTyVars.cc --
//
// Author           : Richard C. Bilson
// Created On       : Mon May 18 07:44:20 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Thu Mar 16 15:44:27 2017
// Update Count     : 3
//

#include <utility>                      // for pair

#include "GenPoly.h"                    // for mangleType, TyVarMap, alignof...
#include "GenPoly/ErasableScopedMap.h"  // for ErasableScopedMap<>::const_it...
#include "ScrubTyVars.h"
#include "SynTree/Declaration.h"        // for TypeDecl, TypeDecl::Data, Typ...
#include "SynTree/Expression.h"         // for Expression (ptr only), NameExpr
#include "SynTree/Mutator.h"            // for Mutator
#include "SynTree/Type.h"               // for PointerType, TypeInstType, Type

namespace GenPoly {
        Type * ScrubTyVars::postmutate( TypeInstType * typeInst ) {
                if ( ! tyVars ) {
                        if ( typeInst->get_isFtype() ) {
                                delete typeInst;
                                return new PointerType( Type::Qualifiers(), new FunctionType( Type::Qualifiers(), true ) );
                        } else {
                                PointerType * ret = new PointerType( Type::Qualifiers(), new VoidType( typeInst->get_qualifiers() ) );
                                delete typeInst;
                                return ret;
                        }
                }

                TyVarMap::const_iterator tyVar = tyVars->find( typeInst->name );
                if ( tyVar != tyVars->end() ) {
                        switch ( tyVar->second.kind ) {
                          case TypeDecl::Dtype:
                          case TypeDecl::Ttype:
                                {
                                        PointerType * ret = new PointerType( Type::Qualifiers(), new VoidType( typeInst->get_qualifiers() ) );
                                        delete typeInst;
                                        return ret;
                                }
                          case TypeDecl::Ftype:
                                delete typeInst;
                                return new PointerType( Type::Qualifiers(), new FunctionType( Type::Qualifiers(), true ) );
                          default:
                                assertf(false, "Unhandled tyvar kind: %d", tyVar->second.kind);
                        } // switch
                } // if
                return typeInst;
        }

        Type * ScrubTyVars::mutateAggregateType( Type * ty ) {
                if ( shouldScrub( ty ) ) {
                        PointerType * ret = new PointerType( Type::Qualifiers(), new VoidType( ty->get_qualifiers() ) );
                        delete ty;
                        return ret;
                }
                return ty;
        }

        Type * ScrubTyVars::postmutate( StructInstType * structInst ) {
                return mutateAggregateType( structInst );
        }

        Type * ScrubTyVars::postmutate( UnionInstType * unionInst ) {
                return mutateAggregateType( unionInst );
        }

        void ScrubTyVars::primeBaseScrub( Type * type ) {
                // need to determine whether type needs to be scrubbed to determine whether
                // automatic recursion is necessary
                if ( Type * t = shouldScrub( type ) ) {
                        visit_children = false;
                        GuardValue( dynType );
                        dynType = t;
                }
        }

        Expression * ScrubTyVars::postmutate( SizeofExpr * szeof ) {
                // sizeof( T ) => _sizeof_T parameter, which is the size of T
                if ( dynType ) {
                        Expression *expr = new NameExpr( sizeofName( mangleType( dynType ) ) );
                        return expr;
                } // if
                return szeof;
        }

        Expression * ScrubTyVars::postmutate( AlignofExpr * algnof ) {
                // alignof( T ) => _alignof_T parameter, which is the alignment of T
                if ( dynType ) {
                        Expression *expr = new NameExpr( alignofName( mangleType( dynType ) ) );
                        return expr;
                } // if
                return algnof;
        }

        Type * ScrubTyVars::postmutate( PointerType * pointer ) {
                if ( dynType ) {
                        Type * ret = dynType->acceptMutator( *visitor );
                        ret->get_qualifiers() |= pointer->get_qualifiers();
                        pointer->base = nullptr;
                        delete pointer;
                        return ret;
                }
                return pointer;
        }
} // namespace GenPoly

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