void KNCVectorLegalization::visit(const Nodecl::VectorLoad& n)
    {
        const Nodecl::NodeclBase rhs = n.get_rhs();
        const Nodecl::NodeclBase mask = n.get_mask();
        const Nodecl::List flags = n.get_flags().as<Nodecl::List>();

        walk(rhs);
        walk(mask);
        walk(flags);

        bool explicitly_aligned = !flags.find_first<Nodecl::AlignedFlag>().is_null();

        // Turn unaligned load into gather
        if (!explicitly_aligned
                && (_prefer_gather_scatter ||
                    (_prefer_mask_gather_scatter && !mask.is_null())))
        {
            VECTORIZATION_DEBUG()
            {
                fprintf(stderr, "KNC Legalization: Turn unaligned load '%s' into "\
                        "adjacent gather\n", rhs.prettyprint().c_str());
            }
示例#2
0
    bool NodeclStaticInfo::is_simd_aligned_access( const Nodecl::NodeclBase& n, 
            const TL::ObjectList<Nodecl::NodeclBase>* suitable_expressions, 
            int unroll_factor, int alignment ) const
    {
        if( !n.is<Nodecl::ArraySubscript>( ) )
        {
            std::cerr << "warning: returning false for is_simd_aligned_access when asking for nodecl '" 
                      << n.prettyprint( ) << "' which is not an array subscript" << std::endl;
            return false;
        }
        
        bool result = false;
        
        Nodecl::NodeclBase subscripted = n.as<Nodecl::ArraySubscript>( ).get_subscripted( );
        int type_size = subscripted.get_type().basic_type().get_size();

        SuitableAlignmentVisitor sa_v( _induction_variables, suitable_expressions, unroll_factor, type_size, alignment );
        int subscript_alignment = sa_v.walk( n );
        
        if( (subscript_alignment % alignment) == 0 )
            result = true;
        
        return result;
    }
示例#3
0
 ObjectList<Nodecl::NodeclBase> ExtendedSymbol::get_nodecls_base( const Nodecl::NodeclBase& n )
 {
     if (n.is<Nodecl::Symbol>() || n.is<Nodecl::PointerToMember>() || n.is<Nodecl::ObjectInit>() || n.is<Nodecl::FunctionCall>())
     {
         return ObjectList<Nodecl::NodeclBase>(1, n);
     }
     else if (n.is<Nodecl::IntegerLiteral>() || n.is<Nodecl::FloatingLiteral>() || n.is<Nodecl::ComplexLiteral>()
             || n.is<Nodecl::StringLiteral>() || n.is<Nodecl::BooleanLiteral>())
     {
         return ObjectList<Nodecl::NodeclBase>();
     }
     else if (n.is<Nodecl::ClassMemberAccess>())
     {
         Nodecl::ClassMemberAccess aux = n.as<Nodecl::ClassMemberAccess>();
         return get_nodecls_base(aux.get_lhs());
     }
     else if (n.is<Nodecl::ArraySubscript>())
     {
         Nodecl::ArraySubscript aux = n.as<Nodecl::ArraySubscript>();
         return get_nodecls_base(aux.get_subscripted());
     }
     else if (n.is<Nodecl::Reference>())
     {
         Nodecl::Reference aux = n.as<Nodecl::Reference>();
         return get_nodecls_base(aux.get_rhs());
     }
     else if (n.is<Nodecl::Dereference>())
     {
         Nodecl::Dereference aux = n.as<Nodecl::Dereference>();
         return get_nodecls_base(aux.get_rhs());
     }
     else if (n.is<Nodecl::Conversion>())
     {
         Nodecl::Conversion aux = n.as<Nodecl::Conversion>();
         return get_nodecls_base(aux.get_nest());
     }
     else if (n.is<Nodecl::Cast>())
     {
         Nodecl::Cast aux = n.as<Nodecl::Cast>();
         return get_nodecls_base(aux.get_rhs());
     }
     /*!
     * We can have (pre- post-) in- de-crements and other arithmetic operations
     * Example:
     * T *curr_high = ...;
     * *curr_high-- = l;
     * "*curr_high--" is a _KILLED_VAR
     */
     else if (n.is<Nodecl::Predecrement>())
     {
         Nodecl::Predecrement aux = n.as<Nodecl::Predecrement>();
         return get_nodecls_base(aux.get_rhs());
     }
     else if (n.is<Nodecl::Postdecrement>())
     {
         Nodecl::Postdecrement aux = n.as<Nodecl::Postdecrement>();
         return get_nodecls_base(aux.get_rhs());
     }
     else if (n.is<Nodecl::Preincrement>())
     {
         Nodecl::Preincrement aux = n.as<Nodecl::Preincrement>();
         return get_nodecls_base(aux.get_rhs());
     }
     else if (n.is<Nodecl::Postincrement>())
     {
         Nodecl::Postincrement aux = n.as<Nodecl::Postincrement>();
         return get_nodecls_base(aux.get_rhs());
     }
     else if (n.is<Nodecl::Add>())
     {
         Nodecl::Add aux = n.as<Nodecl::Add>();
         ObjectList<Nodecl::NodeclBase> rhs = get_nodecls_base(aux.get_rhs());
         ObjectList<Nodecl::NodeclBase> lhs = get_nodecls_base(aux.get_lhs());
         return rhs.append(lhs);
     }
     else
     {
         internal_error("Unexpected type of nodecl '%s' contained in an ExtendedSymbol '%s'",
                     ast_print_node_type(n.get_kind()), n.prettyprint().c_str());
     }
 }