source: src/CodeGen/GenType.cc @ c659968

//
// 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.
//
// GenType.cc --
//
// Author           : Richard C. Bilson
// Created On       : Mon May 18 07:44:20 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Fri Mar 17 09:02:28 2017
// Update Count     : 22
//
#include "GenType.h"

#include <cassert>                // for assert, assertf
#include <list>                   // for _List_iterator, _List_const_iterator
#include <sstream>                // for operator<<, ostringstream, basic_os...

#include "CodeGenerator.h"        // for CodeGenerator
#include "SynTree/Declaration.h"  // for DeclarationWithType
#include "SynTree/Expression.h"   // for Expression
#include "SynTree/Type.h"         // for PointerType, Type, FunctionType
#include "SynTree/Visitor.h"      // for Visitor

namespace CodeGen {
        struct GenType : public WithVisitorRef<GenType>, public WithShortCircuiting {
                GenType( const std::string &typeString, bool pretty = false, bool genC = false, bool lineMarks = false );
                std::string get_typeString() const { return typeString; }
                void set_typeString( const std::string &newValue ) { typeString = newValue; }

                void previsit( BaseSyntaxNode * );
                void postvisit( BaseSyntaxNode * );

                void postvisit( FunctionType * funcType );
                void postvisit( VoidType * voidType );
                void postvisit( BasicType * basicType );
                void postvisit( PointerType * pointerType );
                void postvisit( ArrayType * arrayType );
                void postvisit( ReferenceType * refType );
                void postvisit( StructInstType * structInst );
                void postvisit( UnionInstType * unionInst );
                void postvisit( EnumInstType * enumInst );
                void postvisit( TypeInstType * typeInst );
                void postvisit( TupleType  * tupleType );
                void postvisit( VarArgsType * varArgsType );
                void postvisit( ZeroType * zeroType );
                void postvisit( OneType * oneType );

          private:
                void handleQualifiers( Type *type );
                std::string handleGeneric( ReferenceToType * refType );
                void genArray( const Type::Qualifiers &qualifiers, Type *base, Expression *dimension, bool isVarLen, bool isStatic );

                std::string typeString;
                bool pretty = false; // pretty print
                bool genC = false;   // generating C code?
                bool lineMarks = false;
        };

        std::string genType( Type *type, const std::string &baseString, bool pretty, bool genC , bool lineMarks ) {
                PassVisitor<GenType> gt( baseString, pretty, genC, lineMarks );
                std::ostringstream os;

                if ( ! type->get_attributes().empty() ) {
                        PassVisitor<CodeGenerator> cg( os, pretty, genC, lineMarks );
                        cg.pass.genAttributes( type->get_attributes() );
                } // if

                type->accept( gt );
                return os.str() + gt.pass.get_typeString();
        }

  std::string genPrettyType( Type * type, const std::string & baseString ) {
        return genType( type, baseString, true, false );
  }

        GenType::GenType( const std::string &typeString, bool pretty, bool genC, bool lineMarks ) : typeString( typeString ), pretty( pretty ), genC( genC ), lineMarks( lineMarks ) {}

        // *** BaseSyntaxNode
        void GenType::previsit( BaseSyntaxNode * ) {
                // turn off automatic recursion for all nodes, to allow each visitor to
                // precisely control the order in which its children are visited.
                visit_children = false;
        }

        void GenType::postvisit( BaseSyntaxNode * node ) {
                std::stringstream ss;
                node->print( ss );
                assertf( false, "Unhandled node reached in GenType: %s", ss.str().c_str() );
        }

        void GenType::postvisit( VoidType * voidType ) {
                typeString = "void " + typeString;
                handleQualifiers( voidType );
        }

        void GenType::postvisit( BasicType * basicType ) {
                BasicType::Kind kind = basicType->kind;
                assert( 0 <= kind && kind < BasicType::NUMBER_OF_BASIC_TYPES );
                typeString = std::string( BasicType::typeNames[kind] ) + " " + typeString;
                handleQualifiers( basicType );
        }

        void GenType::genArray( const Type::Qualifiers & qualifiers, Type * base, Expression *dimension, bool isVarLen, bool isStatic ) {
                std::ostringstream os;
                if ( typeString != "" ) {
                        if ( typeString[ 0 ] == '*' ) {
                                os << "(" << typeString << ")";
                        } else {
                                os << typeString;
                        } // if
                } // if
                os << "[";

                if ( isStatic ) {
                        os << "static ";
                } // if
                if ( qualifiers.is_const ) {
                        os << "const ";
                } // if
                if ( qualifiers.is_volatile ) {
                        os << "volatile ";
                } // if
                if ( qualifiers.is_restrict ) {
                        os << "__restrict ";
                } // if
                if ( qualifiers.is_atomic ) {
                        os << "_Atomic ";
                } // if
                if ( dimension != 0 ) {
                        PassVisitor<CodeGenerator> cg( os, pretty, genC, lineMarks );
                        dimension->accept( cg );
                } else if ( isVarLen ) {
                        // no dimension expression on a VLA means it came in with the * token
                        os << "*";
                } // if
                os << "]";

                typeString = os.str();

                base->accept( *visitor );
        }

        void GenType::postvisit( PointerType * pointerType ) {
                assert( pointerType->base != 0);
                if ( pointerType->get_isStatic() || pointerType->get_isVarLen() || pointerType->dimension ) {
                        genArray( pointerType->get_qualifiers(), pointerType->base, pointerType->dimension, pointerType->get_isVarLen(), pointerType->get_isStatic() );
                } else {
                        handleQualifiers( pointerType );
                        if ( typeString[ 0 ] == '?' ) {
                                typeString = "* " + typeString;
                        } else {
                                typeString = "*" + typeString;
                        } // if
                        pointerType->base->accept( *visitor );
                } // if
        }

        void GenType::postvisit( ArrayType * arrayType ) {
                genArray( arrayType->get_qualifiers(), arrayType->base, arrayType->dimension, arrayType->get_isVarLen(), arrayType->get_isStatic() );
        }

        void GenType::postvisit( ReferenceType * refType ) {
                assert( refType->base != 0);
                assertf( ! genC, "Reference types should not reach code generation." );
                handleQualifiers( refType );
                typeString = "&" + typeString;
                refType->base->accept( *visitor );
        }

        void GenType::postvisit( FunctionType * funcType ) {
                std::ostringstream os;

                if ( typeString != "" ) {
                        if ( typeString[ 0 ] == '*' ) {
                                os << "(" << typeString << ")";
                        } else {
                                os << typeString;
                        } // if
                } // if

                /************* parameters ***************/

                const std::list<DeclarationWithType *> &pars = funcType->parameters;

                if ( pars.empty() ) {
                        if ( funcType->get_isVarArgs() ) {
                                os << "()";
                        } else {
                                os << "(void)";
                        } // if
                } else {
                        PassVisitor<CodeGenerator> cg( os, pretty, genC, lineMarks );
                        os << "(" ;

                        cg.pass.genCommaList( pars.begin(), pars.end() );

                        if ( funcType->get_isVarArgs() ) {
                                os << ", ...";
                        } // if
                        os << ")";
                } // if

                typeString = os.str();

                if ( funcType->returnVals.size() == 0 ) {
                        typeString = "void " + typeString;
                } else {
                        funcType->returnVals.front()->get_type()->accept( *visitor );
                } // if

                // add forall
                if( ! funcType->forall.empty() && ! genC ) {
                        // assertf( ! genC, "Aggregate type parameters should not reach code generation." );
                        std::ostringstream os;
                        PassVisitor<CodeGenerator> cg( os, pretty, genC, lineMarks );
                        os << "forall(";
                        cg.pass.genCommaList( funcType->forall.begin(), funcType->forall.end() );
                        os << ")" << std::endl;
                        typeString = os.str() + typeString;
                }
        }

        std::string GenType::handleGeneric( ReferenceToType * refType ) {
                if ( ! refType->parameters.empty() ) {
                        std::ostringstream os;
                        PassVisitor<CodeGenerator> cg( os, pretty, genC, lineMarks );
                        os << "(";
                        cg.pass.genCommaList( refType->parameters.begin(), refType->parameters.end() );
                        os << ") ";
                        return os.str();
                }
                return "";
        }

        void GenType::postvisit( StructInstType * structInst )  {
                typeString = structInst->name + handleGeneric( structInst ) + " " + typeString;
                if ( genC ) typeString = "struct " + typeString;
                handleQualifiers( structInst );
        }

        void GenType::postvisit( UnionInstType * unionInst ) {
                typeString = unionInst->name + handleGeneric( unionInst ) + " " + typeString;
                if ( genC ) typeString = "union " + typeString;
                handleQualifiers( unionInst );
        }

        void GenType::postvisit( EnumInstType * enumInst ) {
                typeString = enumInst->name + " " + typeString;
                if ( genC ) typeString = "enum " + typeString;
                handleQualifiers( enumInst );
        }

        void GenType::postvisit( TypeInstType * typeInst ) {
                typeString = typeInst->name + " " + typeString;
                handleQualifiers( typeInst );
        }

        void GenType::postvisit( TupleType * tupleType ) {
                assertf( ! genC, "Tuple types should not reach code generation." );
                unsigned int i = 0;
                std::ostringstream os;
                os << "[";
                for ( Type * t : *tupleType ) {
                        i++;
                        os << genType( t, "", pretty, genC, lineMarks ) << (i == tupleType->size() ? "" : ", ");
                }
                os << "] ";
                typeString = os.str() + typeString;
        }

        void GenType::postvisit( VarArgsType * varArgsType ) {
                typeString = "__builtin_va_list " + typeString;
                handleQualifiers( varArgsType );
        }

        void GenType::postvisit( ZeroType * zeroType ) {
                // ideally these wouldn't hit codegen at all, but should be safe to make them ints
                typeString = (pretty ? "zero_t " : "long int ") + typeString;
                handleQualifiers( zeroType );
        }

        void GenType::postvisit( OneType * oneType ) {
                // ideally these wouldn't hit codegen at all, but should be safe to make them ints
                typeString = (pretty ? "one_t " : "long int ") + typeString;
                handleQualifiers( oneType );
        }

        void GenType::handleQualifiers( Type * type ) {
                if ( type->get_const() ) {
                        typeString = "const " + typeString;
                } // if
                if ( type->get_volatile() ) {
                        typeString = "volatile " + typeString;
                } // if
                if ( type->get_restrict() ) {
                        typeString = "__restrict " + typeString;
                } // if
                if ( type->get_atomic() ) {
                        typeString = "_Atomic " + typeString;
                } // if
                if ( type->get_lvalue() && ! genC ) {
                        // when not generating C code, print lvalue for debugging.
                        typeString = "lvalue " + typeString;
                }
        }
} // namespace CodeGen

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