1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // CodeGenerator.cc -- |
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8 | // |
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9 | // Author : Richard C. Bilson |
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10 | // Created On : Mon May 18 07:44:20 2015 |
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11 | // Last Modified By : Peter A. Buhr |
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12 | // Last Modified On : Sat May 5 09:08:32 2018 |
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13 | // Update Count : 494 |
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14 | // |
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15 | #include "CodeGenerator.h" |
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16 | |
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17 | #include <cassert> // for assert, assertf |
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18 | #include <list> // for _List_iterator, list, list<>::it... |
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19 | |
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20 | #include "Common/UniqueName.h" // for UniqueName |
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21 | #include "Common/utility.h" // for CodeLocation, toString |
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22 | #include "GenType.h" // for genType |
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23 | #include "InitTweak/InitTweak.h" // for getPointerBase |
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24 | #include "OperatorTable.h" // for OperatorInfo, operatorLookup |
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25 | #include "Parser/LinkageSpec.h" // for Spec, Intrinsic |
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26 | #include "SynTree/Attribute.h" // for Attribute |
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27 | #include "SynTree/BaseSyntaxNode.h" // for BaseSyntaxNode |
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28 | #include "SynTree/Constant.h" // for Constant |
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29 | #include "SynTree/Declaration.h" // for DeclarationWithType, TypeDecl |
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30 | #include "SynTree/Expression.h" // for Expression, UntypedExpr, Applica... |
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31 | #include "SynTree/Initializer.h" // for Initializer, ListInit, Designation |
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32 | #include "SynTree/Label.h" // for Label, operator<< |
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33 | #include "SynTree/Statement.h" // for Statement, AsmStmt, BranchStmt |
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34 | #include "SynTree/Type.h" // for Type, Type::StorageClasses, Func... |
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35 | |
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36 | using namespace std; |
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37 | |
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38 | namespace CodeGen { |
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39 | int CodeGenerator::tabsize = 4; |
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40 | |
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41 | // the kinds of statements that would ideally be followed by whitespace |
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42 | bool wantSpacing( Statement * stmt) { |
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43 | return dynamic_cast< IfStmt * >( stmt ) || dynamic_cast< CompoundStmt * >( stmt ) || |
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44 | dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * >( stmt ) || dynamic_cast< SwitchStmt *>( stmt ); |
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45 | } |
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46 | |
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47 | void CodeGenerator::extension( Expression * expr ) { |
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48 | if ( expr->get_extension() ) { |
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49 | output << "__extension__ "; |
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50 | } // if |
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51 | } // extension |
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52 | |
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53 | void CodeGenerator::extension( Declaration * decl ) { |
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54 | if ( decl->get_extension() ) { |
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55 | output << "__extension__ "; |
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56 | } // if |
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57 | } // extension |
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58 | |
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59 | void CodeGenerator::asmName( DeclarationWithType * decl ) { |
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60 | if ( ConstantExpr * asmName = dynamic_cast<ConstantExpr *>(decl->get_asmName()) ) { |
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61 | output << " asm ( " << asmName->get_constant()->get_value() << " )"; |
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62 | } // if |
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63 | } // extension |
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64 | |
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65 | CodeGenerator::LabelPrinter & CodeGenerator::LabelPrinter::operator()( std::list< Label > & l ) { |
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66 | labels = &l; |
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67 | return *this; |
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68 | } |
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69 | |
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70 | ostream & operator<<( ostream & output, CodeGenerator::LabelPrinter & printLabels ) { |
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71 | std::list< Label > & labs = *printLabels.labels; |
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72 | // l.unique(); // assumes a sorted list. Why not use set? Does order matter? |
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73 | for ( Label & l : labs ) { |
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74 | output << l.get_name() + ": "; |
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75 | printLabels.cg.genAttributes( l.get_attributes() ); |
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76 | } // for |
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77 | return output; |
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78 | } |
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79 | |
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80 | /* Using updateLocation at the beginning of a node and endl |
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81 | * within a node should become the method of formating. |
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82 | */ |
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83 | void CodeGenerator::updateLocation( CodeLocation const & to ) { |
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84 | // skip if linemarks shouldn't appear or if codelocation is unset |
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85 | if ( !lineMarks || to.isUnset() ) return; |
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86 | |
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87 | if ( currentLocation.followedBy( to, 0 ) ) { |
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88 | return; |
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89 | } else if ( currentLocation.followedBy( to, 1 ) ) { |
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90 | output << "\n" << indent; |
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91 | currentLocation.first_line += 1; |
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92 | } else if ( currentLocation.followedBy( to, 2 ) ) { |
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93 | output << "\n\n" << indent; |
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94 | currentLocation.first_line += 2; |
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95 | } else { |
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96 | output << "\n# " << to.first_line << " \"" << to.filename |
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97 | << "\"\n" << indent; |
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98 | currentLocation = to; |
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99 | } |
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100 | output << std::flush; |
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101 | } |
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102 | |
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103 | void CodeGenerator::updateLocation( BaseSyntaxNode const * to ) { |
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104 | updateLocation( to->location ); |
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105 | } |
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106 | |
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107 | // replace endl |
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108 | ostream & CodeGenerator::LineEnder::operator()( ostream & os ) const { |
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109 | // if ( !cg.lineMarks ) { |
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110 | // os << "\n" << cg.indent << std::flush; |
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111 | // } |
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112 | os << "\n" << std::flush; |
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113 | cg.currentLocation.first_line++; |
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114 | // os << "/* did endl; current loc is: " << cg.currentLocation.first_line << "*/"; |
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115 | return os; |
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116 | } |
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117 | |
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118 | CodeGenerator::CodeGenerator( std::ostream & os, bool pretty, bool genC, bool lineMarks, bool printExprTypes ) : indent( CodeGenerator::tabsize ), output( os ), printLabels( *this ), pretty( pretty ), genC( genC ), lineMarks( lineMarks ), printExprTypes( printExprTypes ), endl( *this ) {} |
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119 | |
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120 | string CodeGenerator::mangleName( DeclarationWithType * decl ) { |
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121 | if ( pretty ) return decl->get_name(); |
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122 | if ( decl->get_mangleName() != "" ) { |
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123 | // need to incorporate scope level in order to differentiate names for destructors |
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124 | return decl->get_scopedMangleName(); |
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125 | } else { |
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126 | return decl->get_name(); |
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127 | } // if |
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128 | } |
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129 | |
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130 | void CodeGenerator::genAttributes( list< Attribute * > & attributes ) { |
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131 | if ( attributes.empty() ) return; |
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132 | output << "__attribute__ (("; |
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133 | for ( list< Attribute * >::iterator attr( attributes.begin() );; ) { |
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134 | output << (*attr)->get_name(); |
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135 | if ( ! (*attr)->get_parameters().empty() ) { |
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136 | output << "("; |
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137 | genCommaList( (*attr)->get_parameters().begin(), (*attr)->get_parameters().end() ); |
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138 | output << ")"; |
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139 | } // if |
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140 | if ( ++attr == attributes.end() ) break; |
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141 | output << ","; // separator |
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142 | } // for |
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143 | output << ")) "; |
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144 | } // CodeGenerator::genAttributes |
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145 | |
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146 | // *** BaseSyntaxNode |
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147 | void CodeGenerator::previsit( BaseSyntaxNode * node ) { |
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148 | // turn off automatic recursion for all nodes, to allow each visitor to |
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149 | // precisely control the order in which its children are visited. |
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150 | visit_children = false; |
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151 | updateLocation( node ); |
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152 | } |
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153 | |
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154 | // *** BaseSyntaxNode |
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155 | void CodeGenerator::postvisit( BaseSyntaxNode * node ) { |
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156 | std::stringstream ss; |
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157 | node->print( ss ); |
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158 | assertf( false, "Unhandled node reached in CodeGenerator: %s", ss.str().c_str() ); |
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159 | } |
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160 | |
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161 | // *** Expression |
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162 | void CodeGenerator::previsit( Expression * node ) { |
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163 | previsit( (BaseSyntaxNode *)node ); |
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164 | GuardAction( [this, node](){ |
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165 | if ( printExprTypes ) { |
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166 | output << " /* " << genType( node->result, "", pretty, genC ) << " */ "; |
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167 | } |
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168 | } ); |
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169 | } |
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170 | |
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171 | // *** Declarations |
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172 | void CodeGenerator::postvisit( FunctionDecl * functionDecl ) { |
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173 | extension( functionDecl ); |
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174 | genAttributes( functionDecl->get_attributes() ); |
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175 | |
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176 | handleStorageClass( functionDecl ); |
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177 | functionDecl->get_funcSpec().print( output ); |
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178 | |
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179 | output << genType( functionDecl->get_functionType(), mangleName( functionDecl ), pretty, genC ); |
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180 | |
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181 | asmName( functionDecl ); |
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182 | |
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183 | if ( functionDecl->get_statements() ) { |
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184 | functionDecl->get_statements()->accept( *visitor ); |
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185 | } // if |
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186 | } |
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187 | |
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188 | void CodeGenerator::postvisit( ObjectDecl * objectDecl ) { |
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189 | if (objectDecl->get_name().empty() && genC ) { |
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190 | // only generate an anonymous name when generating C code, otherwise it clutters the output too much |
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191 | static UniqueName name = { "__anonymous_object" }; |
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192 | objectDecl->set_name( name.newName() ); |
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193 | } |
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194 | |
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195 | extension( objectDecl ); |
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196 | genAttributes( objectDecl->get_attributes() ); |
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197 | |
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198 | handleStorageClass( objectDecl ); |
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199 | output << genType( objectDecl->get_type(), mangleName( objectDecl ), pretty, genC ); |
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200 | |
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201 | asmName( objectDecl ); |
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202 | |
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203 | if ( objectDecl->get_init() ) { |
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204 | output << " = "; |
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205 | objectDecl->get_init()->accept( *visitor ); |
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206 | } // if |
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207 | |
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208 | if ( objectDecl->get_bitfieldWidth() ) { |
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209 | output << ":"; |
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210 | objectDecl->get_bitfieldWidth()->accept( *visitor ); |
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211 | } // if |
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212 | } |
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213 | |
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214 | void CodeGenerator::handleAggregate( AggregateDecl * aggDecl, const std::string & kind ) { |
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215 | if( ! aggDecl->get_parameters().empty() && ! genC ) { |
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216 | // assertf( ! genC, "Aggregate type parameters should not reach code generation." ); |
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217 | output << "forall("; |
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218 | genCommaList( aggDecl->get_parameters().begin(), aggDecl->get_parameters().end() ); |
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219 | output << ")" << endl; |
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220 | output << indent; |
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221 | } |
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222 | |
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223 | output << kind; |
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224 | genAttributes( aggDecl->get_attributes() ); |
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225 | output << aggDecl->get_name(); |
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226 | |
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227 | if ( aggDecl->has_body() ) { |
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228 | std::list< Declaration * > & memb = aggDecl->get_members(); |
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229 | output << " {" << endl; |
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230 | |
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231 | ++indent; |
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232 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) { |
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233 | output << indent; |
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234 | (*i)->accept( *visitor ); |
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235 | output << ";" << endl; |
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236 | } // for |
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237 | |
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238 | --indent; |
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239 | |
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240 | output << indent << "}"; |
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241 | } // if |
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242 | } |
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243 | |
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244 | void CodeGenerator::postvisit( StructDecl * structDecl ) { |
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245 | extension( structDecl ); |
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246 | handleAggregate( structDecl, "struct " ); |
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247 | } |
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248 | |
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249 | void CodeGenerator::postvisit( UnionDecl * unionDecl ) { |
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250 | extension( unionDecl ); |
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251 | handleAggregate( unionDecl, "union " ); |
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252 | } |
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253 | |
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254 | void CodeGenerator::postvisit( EnumDecl * enumDecl ) { |
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255 | extension( enumDecl ); |
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256 | output << "enum "; |
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257 | genAttributes( enumDecl->get_attributes() ); |
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258 | |
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259 | output << enumDecl->get_name(); |
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260 | |
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261 | std::list< Declaration* > &memb = enumDecl->get_members(); |
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262 | |
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263 | if ( ! memb.empty() ) { |
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264 | output << " {" << endl; |
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265 | |
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266 | ++indent; |
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267 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) { |
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268 | ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i ); |
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269 | assert( obj ); |
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270 | output << indent << mangleName( obj ); |
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271 | if ( obj->get_init() ) { |
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272 | output << " = "; |
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273 | obj->get_init()->accept( *visitor ); |
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274 | } // if |
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275 | output << "," << endl; |
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276 | } // for |
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277 | |
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278 | --indent; |
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279 | |
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280 | output << indent << "}"; |
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281 | } // if |
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282 | } |
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283 | |
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284 | void CodeGenerator::postvisit( TraitDecl * traitDecl ) { |
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285 | assertf( ! genC, "TraitDecls should not reach code generation." ); |
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286 | extension( traitDecl ); |
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287 | handleAggregate( traitDecl, "trait " ); |
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288 | } |
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289 | |
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290 | void CodeGenerator::postvisit( TypedefDecl * typeDecl ) { |
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291 | assertf( ! genC, "Typedefs are removed and substituted in earlier passes." ); |
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292 | output << "typedef "; |
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293 | output << genType( typeDecl->get_base(), typeDecl->get_name(), pretty, genC ) << endl; |
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294 | } |
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295 | |
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296 | void CodeGenerator::postvisit( TypeDecl * typeDecl ) { |
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297 | assertf( ! genC, "TypeDecls should not reach code generation." ); |
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298 | output << typeDecl->genTypeString() << " " << typeDecl->name; |
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299 | if ( typeDecl->sized ) { |
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300 | output << " | sized(" << typeDecl->name << ")"; |
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301 | } |
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302 | if ( ! typeDecl->assertions.empty() ) { |
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303 | output << " | { "; |
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304 | for ( DeclarationWithType * assert : typeDecl->assertions ) { |
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305 | assert->accept( *visitor ); |
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306 | output << "; "; |
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307 | } |
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308 | output << " }"; |
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309 | } |
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310 | } |
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311 | |
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312 | void CodeGenerator::postvisit( StaticAssertDecl * assertDecl ) { |
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313 | output << "_Static_assert("; |
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314 | assertDecl->condition->accept( *visitor ); |
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315 | output << ", "; |
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316 | assertDecl->message->accept( *visitor ); |
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317 | output << ")"; |
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318 | } |
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319 | |
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320 | void CodeGenerator::postvisit( Designation * designation ) { |
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321 | std::list< Expression * > designators = designation->get_designators(); |
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322 | if ( designators.size() == 0 ) return; |
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323 | for ( Expression * des : designators ) { |
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324 | if ( dynamic_cast< NameExpr * >( des ) || dynamic_cast< VariableExpr * >( des ) ) { |
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325 | // if expression is a NameExpr or VariableExpr, then initializing aggregate member |
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326 | output << "."; |
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327 | des->accept( *visitor ); |
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328 | } else { |
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329 | // otherwise, it has to be a ConstantExpr or CastExpr, initializing array eleemnt |
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330 | output << "["; |
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331 | des->accept( *visitor ); |
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332 | output << "]"; |
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333 | } // if |
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334 | } // for |
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335 | output << " = "; |
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336 | } |
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337 | |
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338 | void CodeGenerator::postvisit( SingleInit * init ) { |
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339 | init->get_value()->accept( *visitor ); |
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340 | } |
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341 | |
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342 | void CodeGenerator::postvisit( ListInit * init ) { |
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343 | auto initBegin = init->begin(); |
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344 | auto initEnd = init->end(); |
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345 | auto desigBegin = init->get_designations().begin(); |
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346 | auto desigEnd = init->get_designations().end(); |
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347 | |
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348 | output << "{ "; |
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349 | for ( ; initBegin != initEnd && desigBegin != desigEnd; ) { |
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350 | (*desigBegin)->accept( *visitor ); |
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351 | (*initBegin)->accept( *visitor ); |
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352 | ++initBegin, ++desigBegin; |
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353 | if ( initBegin != initEnd ) { |
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354 | output << ", "; |
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355 | } |
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356 | } |
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357 | output << " }"; |
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358 | assertf( initBegin == initEnd && desigBegin == desigEnd, "Initializers and designators not the same length. %s", toString( init ).c_str() ); |
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359 | } |
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360 | |
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361 | void CodeGenerator::postvisit( ConstructorInit * init ){ |
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362 | assertf( ! genC, "ConstructorInit nodes should not reach code generation." ); |
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363 | // pseudo-output for constructor/destructor pairs |
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364 | output << "<ctorinit>{" << endl << ++indent << "ctor: "; |
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365 | maybeAccept( init->get_ctor(), *visitor ); |
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366 | output << ", " << endl << indent << "dtor: "; |
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367 | maybeAccept( init->get_dtor(), *visitor ); |
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368 | output << endl << --indent << "}"; |
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369 | } |
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370 | |
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371 | void CodeGenerator::postvisit( Constant * constant ) { |
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372 | output << constant->get_value(); |
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373 | } |
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374 | |
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375 | // *** Expressions |
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376 | void CodeGenerator::postvisit( ApplicationExpr * applicationExpr ) { |
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377 | extension( applicationExpr ); |
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378 | if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) { |
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379 | OperatorInfo opInfo; |
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380 | if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) { |
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381 | std::list< Expression* >::iterator arg = applicationExpr->get_args().begin(); |
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382 | switch ( opInfo.type ) { |
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383 | case OT_INDEX: |
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384 | assert( applicationExpr->get_args().size() == 2 ); |
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385 | (*arg++)->accept( *visitor ); |
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386 | output << "["; |
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387 | (*arg)->accept( *visitor ); |
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388 | output << "]"; |
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389 | break; |
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390 | |
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391 | case OT_CALL: |
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392 | // there are no intrinsic definitions of the function call operator |
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393 | assert( false ); |
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394 | break; |
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395 | |
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396 | case OT_CTOR: |
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397 | case OT_DTOR: |
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398 | if ( applicationExpr->get_args().size() == 1 ) { |
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399 | // the expression fed into a single parameter constructor or destructor may contain side |
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400 | // effects, so must still output this expression |
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401 | output << "("; |
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402 | (*arg++)->accept( *visitor ); |
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403 | output << ") /* " << opInfo.inputName << " */"; |
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404 | } else if ( applicationExpr->get_args().size() == 2 ) { |
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405 | // intrinsic two parameter constructors are essentially bitwise assignment |
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406 | output << "("; |
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407 | (*arg++)->accept( *visitor ); |
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408 | output << opInfo.symbol; |
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409 | (*arg)->accept( *visitor ); |
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410 | output << ") /* " << opInfo.inputName << " */"; |
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411 | } else { |
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412 | // no constructors with 0 or more than 2 parameters |
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413 | assert( false ); |
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414 | } // if |
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415 | break; |
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416 | |
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417 | case OT_PREFIX: |
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418 | case OT_PREFIXASSIGN: |
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419 | assert( applicationExpr->get_args().size() == 1 ); |
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420 | output << "("; |
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421 | output << opInfo.symbol; |
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422 | (*arg)->accept( *visitor ); |
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423 | output << ")"; |
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424 | break; |
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425 | |
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426 | case OT_POSTFIX: |
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427 | case OT_POSTFIXASSIGN: |
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428 | assert( applicationExpr->get_args().size() == 1 ); |
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429 | (*arg)->accept( *visitor ); |
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430 | output << opInfo.symbol; |
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431 | break; |
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432 | |
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433 | |
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434 | case OT_INFIX: |
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435 | case OT_INFIXASSIGN: |
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436 | assert( applicationExpr->get_args().size() == 2 ); |
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437 | output << "("; |
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438 | (*arg++)->accept( *visitor ); |
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439 | output << opInfo.symbol; |
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440 | (*arg)->accept( *visitor ); |
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441 | output << ")"; |
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442 | break; |
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443 | |
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444 | case OT_CONSTANT: |
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445 | case OT_LABELADDRESS: |
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446 | // there are no intrinsic definitions of 0/1 or label addresses as functions |
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447 | assert( false ); |
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448 | } // switch |
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449 | } else { |
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450 | varExpr->accept( *visitor ); |
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451 | output << "("; |
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452 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
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453 | output << ")"; |
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454 | } // if |
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455 | } else { |
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456 | applicationExpr->get_function()->accept( *visitor ); |
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457 | output << "("; |
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458 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
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459 | output << ")"; |
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460 | } // if |
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461 | } |
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462 | |
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463 | void CodeGenerator::postvisit( UntypedExpr * untypedExpr ) { |
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464 | extension( untypedExpr ); |
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465 | if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->function ) ) { |
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466 | OperatorInfo opInfo; |
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467 | if ( operatorLookup( nameExpr->name, opInfo ) ) { |
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468 | std::list< Expression* >::iterator arg = untypedExpr->args.begin(); |
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469 | switch ( opInfo.type ) { |
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470 | case OT_INDEX: |
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471 | assert( untypedExpr->args.size() == 2 ); |
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472 | (*arg++)->accept( *visitor ); |
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473 | output << "["; |
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474 | (*arg)->accept( *visitor ); |
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475 | output << "]"; |
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476 | break; |
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477 | |
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478 | case OT_CALL: |
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479 | assert( false ); |
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480 | |
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481 | case OT_CTOR: |
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482 | case OT_DTOR: |
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483 | if ( untypedExpr->args.size() == 1 ) { |
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484 | // the expression fed into a single parameter constructor or destructor may contain side |
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485 | // effects, so must still output this expression |
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486 | output << "("; |
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487 | (*arg++)->accept( *visitor ); |
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488 | output << ") /* " << opInfo.inputName << " */"; |
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489 | } else if ( untypedExpr->get_args().size() == 2 ) { |
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490 | // intrinsic two parameter constructors are essentially bitwise assignment |
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491 | output << "("; |
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492 | (*arg++)->accept( *visitor ); |
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493 | output << opInfo.symbol; |
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494 | (*arg)->accept( *visitor ); |
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495 | output << ") /* " << opInfo.inputName << " */"; |
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496 | } else { |
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497 | // no constructors with 0 or more than 2 parameters |
---|
498 | assertf( ! genC, "UntypedExpr constructor/destructor with 0 or more than 2 parameters." ); |
---|
499 | output << "("; |
---|
500 | (*arg++)->accept( *visitor ); |
---|
501 | output << opInfo.symbol << "{ "; |
---|
502 | genCommaList( arg, untypedExpr->args.end() ); |
---|
503 | output << "}) /* " << opInfo.inputName << " */"; |
---|
504 | } // if |
---|
505 | break; |
---|
506 | |
---|
507 | case OT_PREFIX: |
---|
508 | case OT_PREFIXASSIGN: |
---|
509 | case OT_LABELADDRESS: |
---|
510 | assert( untypedExpr->args.size() == 1 ); |
---|
511 | output << "("; |
---|
512 | output << opInfo.symbol; |
---|
513 | (*arg)->accept( *visitor ); |
---|
514 | output << ")"; |
---|
515 | break; |
---|
516 | |
---|
517 | case OT_POSTFIX: |
---|
518 | case OT_POSTFIXASSIGN: |
---|
519 | assert( untypedExpr->args.size() == 1 ); |
---|
520 | (*arg)->accept( *visitor ); |
---|
521 | output << opInfo.symbol; |
---|
522 | break; |
---|
523 | |
---|
524 | case OT_INFIX: |
---|
525 | case OT_INFIXASSIGN: |
---|
526 | assert( untypedExpr->args.size() == 2 ); |
---|
527 | output << "("; |
---|
528 | (*arg++)->accept( *visitor ); |
---|
529 | output << opInfo.symbol; |
---|
530 | (*arg)->accept( *visitor ); |
---|
531 | output << ")"; |
---|
532 | break; |
---|
533 | |
---|
534 | case OT_CONSTANT: |
---|
535 | // there are no intrinsic definitions of 0 or 1 as functions |
---|
536 | assert( false ); |
---|
537 | } // switch |
---|
538 | } else { |
---|
539 | // builtin routines |
---|
540 | nameExpr->accept( *visitor ); |
---|
541 | output << "("; |
---|
542 | genCommaList( untypedExpr->args.begin(), untypedExpr->args.end() ); |
---|
543 | output << ")"; |
---|
544 | } // if |
---|
545 | } else { |
---|
546 | untypedExpr->function->accept( *visitor ); |
---|
547 | output << "("; |
---|
548 | genCommaList( untypedExpr->args.begin(), untypedExpr->args.end() ); |
---|
549 | output << ")"; |
---|
550 | } // if |
---|
551 | } |
---|
552 | |
---|
553 | void CodeGenerator::postvisit( RangeExpr * rangeExpr ) { |
---|
554 | rangeExpr->low->accept( *visitor ); |
---|
555 | output << " ... "; |
---|
556 | rangeExpr->high->accept( *visitor ); |
---|
557 | } |
---|
558 | |
---|
559 | void CodeGenerator::postvisit( NameExpr * nameExpr ) { |
---|
560 | extension( nameExpr ); |
---|
561 | OperatorInfo opInfo; |
---|
562 | if ( operatorLookup( nameExpr->name, opInfo ) ) { |
---|
563 | if ( opInfo.type == OT_CONSTANT ) { |
---|
564 | output << opInfo.symbol; |
---|
565 | } else { |
---|
566 | output << opInfo.outputName; |
---|
567 | } |
---|
568 | } else { |
---|
569 | output << nameExpr->get_name(); |
---|
570 | } // if |
---|
571 | } |
---|
572 | |
---|
573 | void CodeGenerator::postvisit( AddressExpr * addressExpr ) { |
---|
574 | extension( addressExpr ); |
---|
575 | output << "(&"; |
---|
576 | addressExpr->arg->accept( *visitor ); |
---|
577 | output << ")"; |
---|
578 | } |
---|
579 | |
---|
580 | void CodeGenerator::postvisit( LabelAddressExpr *addressExpr ) { |
---|
581 | extension( addressExpr ); |
---|
582 | output << "(&&" << addressExpr->arg << ")"; |
---|
583 | } |
---|
584 | |
---|
585 | void CodeGenerator::postvisit( CastExpr * castExpr ) { |
---|
586 | extension( castExpr ); |
---|
587 | output << "("; |
---|
588 | if ( castExpr->get_result()->isVoid() ) { |
---|
589 | output << "(void)"; |
---|
590 | } else { |
---|
591 | // at least one result type of cast. |
---|
592 | // Note: previously, lvalue casts were skipped. Since it's now impossible for the user to write |
---|
593 | // an lvalue cast, this has been taken out. |
---|
594 | output << "("; |
---|
595 | output << genType( castExpr->get_result(), "", pretty, genC ); |
---|
596 | output << ")"; |
---|
597 | } // if |
---|
598 | castExpr->arg->accept( *visitor ); |
---|
599 | output << ")"; |
---|
600 | } |
---|
601 | |
---|
602 | void CodeGenerator::postvisit( KeywordCastExpr * castExpr ) { |
---|
603 | assertf( ! genC, "KeywordCast should not reach code generation." ); |
---|
604 | extension( castExpr ); |
---|
605 | output << "((" << castExpr->targetString() << " &)"; |
---|
606 | castExpr->arg->accept( *visitor ); |
---|
607 | output << ")"; |
---|
608 | } |
---|
609 | |
---|
610 | void CodeGenerator::postvisit( VirtualCastExpr * castExpr ) { |
---|
611 | assertf( ! genC, "VirtualCastExpr should not reach code generation." ); |
---|
612 | extension( castExpr ); |
---|
613 | output << "(virtual "; |
---|
614 | castExpr->get_arg()->accept( *visitor ); |
---|
615 | output << ")"; |
---|
616 | } |
---|
617 | |
---|
618 | void CodeGenerator::postvisit( UntypedMemberExpr * memberExpr ) { |
---|
619 | assertf( ! genC, "UntypedMemberExpr should not reach code generation." ); |
---|
620 | extension( memberExpr ); |
---|
621 | memberExpr->get_aggregate()->accept( *visitor ); |
---|
622 | output << "."; |
---|
623 | memberExpr->get_member()->accept( *visitor ); |
---|
624 | } |
---|
625 | |
---|
626 | void CodeGenerator::postvisit( MemberExpr * memberExpr ) { |
---|
627 | extension( memberExpr ); |
---|
628 | memberExpr->get_aggregate()->accept( *visitor ); |
---|
629 | output << "." << mangleName( memberExpr->get_member() ); |
---|
630 | } |
---|
631 | |
---|
632 | void CodeGenerator::postvisit( VariableExpr * variableExpr ) { |
---|
633 | extension( variableExpr ); |
---|
634 | OperatorInfo opInfo; |
---|
635 | if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) { |
---|
636 | output << opInfo.symbol; |
---|
637 | } else { |
---|
638 | output << mangleName( variableExpr->get_var() ); |
---|
639 | } // if |
---|
640 | } |
---|
641 | |
---|
642 | void CodeGenerator::postvisit( ConstantExpr * constantExpr ) { |
---|
643 | assert( constantExpr->get_constant() ); |
---|
644 | extension( constantExpr ); |
---|
645 | constantExpr->get_constant()->accept( *visitor ); |
---|
646 | } |
---|
647 | |
---|
648 | void CodeGenerator::postvisit( SizeofExpr * sizeofExpr ) { |
---|
649 | extension( sizeofExpr ); |
---|
650 | output << "sizeof("; |
---|
651 | if ( sizeofExpr->get_isType() ) { |
---|
652 | output << genType( sizeofExpr->get_type(), "", pretty, genC ); |
---|
653 | } else { |
---|
654 | sizeofExpr->get_expr()->accept( *visitor ); |
---|
655 | } // if |
---|
656 | output << ")"; |
---|
657 | } |
---|
658 | |
---|
659 | void CodeGenerator::postvisit( AlignofExpr * alignofExpr ) { |
---|
660 | // use GCC extension to avoid bumping std to C11 |
---|
661 | extension( alignofExpr ); |
---|
662 | output << "__alignof__("; |
---|
663 | if ( alignofExpr->get_isType() ) { |
---|
664 | output << genType( alignofExpr->get_type(), "", pretty, genC ); |
---|
665 | } else { |
---|
666 | alignofExpr->get_expr()->accept( *visitor ); |
---|
667 | } // if |
---|
668 | output << ")"; |
---|
669 | } |
---|
670 | |
---|
671 | void CodeGenerator::postvisit( UntypedOffsetofExpr * offsetofExpr ) { |
---|
672 | assertf( ! genC, "UntypedOffsetofExpr should not reach code generation." ); |
---|
673 | output << "offsetof("; |
---|
674 | output << genType( offsetofExpr->get_type(), "", pretty, genC ); |
---|
675 | output << ", " << offsetofExpr->get_member(); |
---|
676 | output << ")"; |
---|
677 | } |
---|
678 | |
---|
679 | void CodeGenerator::postvisit( OffsetofExpr * offsetofExpr ) { |
---|
680 | // use GCC builtin |
---|
681 | output << "__builtin_offsetof("; |
---|
682 | output << genType( offsetofExpr->get_type(), "", pretty, genC ); |
---|
683 | output << ", " << mangleName( offsetofExpr->get_member() ); |
---|
684 | output << ")"; |
---|
685 | } |
---|
686 | |
---|
687 | void CodeGenerator::postvisit( OffsetPackExpr * offsetPackExpr ) { |
---|
688 | assertf( ! genC, "OffsetPackExpr should not reach code generation." ); |
---|
689 | output << "__CFA_offsetpack(" << genType( offsetPackExpr->get_type(), "", pretty, genC ) << ")"; |
---|
690 | } |
---|
691 | |
---|
692 | void CodeGenerator::postvisit( LogicalExpr * logicalExpr ) { |
---|
693 | extension( logicalExpr ); |
---|
694 | output << "("; |
---|
695 | logicalExpr->get_arg1()->accept( *visitor ); |
---|
696 | if ( logicalExpr->get_isAnd() ) { |
---|
697 | output << " && "; |
---|
698 | } else { |
---|
699 | output << " || "; |
---|
700 | } // if |
---|
701 | logicalExpr->get_arg2()->accept( *visitor ); |
---|
702 | output << ")"; |
---|
703 | } |
---|
704 | |
---|
705 | void CodeGenerator::postvisit( ConditionalExpr * conditionalExpr ) { |
---|
706 | extension( conditionalExpr ); |
---|
707 | output << "("; |
---|
708 | conditionalExpr->get_arg1()->accept( *visitor ); |
---|
709 | output << " ? "; |
---|
710 | conditionalExpr->get_arg2()->accept( *visitor ); |
---|
711 | output << " : "; |
---|
712 | conditionalExpr->get_arg3()->accept( *visitor ); |
---|
713 | output << ")"; |
---|
714 | } |
---|
715 | |
---|
716 | void CodeGenerator::postvisit( CommaExpr * commaExpr ) { |
---|
717 | extension( commaExpr ); |
---|
718 | output << "("; |
---|
719 | if ( genC ) { |
---|
720 | // arg1 of a CommaExpr is never used, so it can be safely cast to void to reduce gcc warnings. |
---|
721 | commaExpr->set_arg1( new CastExpr( commaExpr->get_arg1() ) ); |
---|
722 | } |
---|
723 | commaExpr->get_arg1()->accept( *visitor ); |
---|
724 | output << " , "; |
---|
725 | commaExpr->get_arg2()->accept( *visitor ); |
---|
726 | output << ")"; |
---|
727 | } |
---|
728 | |
---|
729 | void CodeGenerator::postvisit( TupleAssignExpr * tupleExpr ) { |
---|
730 | assertf( ! genC, "TupleAssignExpr should not reach code generation." ); |
---|
731 | tupleExpr->stmtExpr->accept( *visitor ); |
---|
732 | } |
---|
733 | |
---|
734 | void CodeGenerator::postvisit( UntypedTupleExpr * tupleExpr ) { |
---|
735 | assertf( ! genC, "UntypedTupleExpr should not reach code generation." ); |
---|
736 | extension( tupleExpr ); |
---|
737 | output << "["; |
---|
738 | genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() ); |
---|
739 | output << "]"; |
---|
740 | } |
---|
741 | |
---|
742 | void CodeGenerator::postvisit( TupleExpr * tupleExpr ) { |
---|
743 | assertf( ! genC, "TupleExpr should not reach code generation." ); |
---|
744 | extension( tupleExpr ); |
---|
745 | output << "["; |
---|
746 | genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() ); |
---|
747 | output << "]"; |
---|
748 | } |
---|
749 | |
---|
750 | void CodeGenerator::postvisit( TupleIndexExpr * tupleExpr ) { |
---|
751 | assertf( ! genC, "TupleIndexExpr should not reach code generation." ); |
---|
752 | extension( tupleExpr ); |
---|
753 | tupleExpr->get_tuple()->accept( *visitor ); |
---|
754 | output << "." << tupleExpr->get_index(); |
---|
755 | } |
---|
756 | |
---|
757 | void CodeGenerator::postvisit( TypeExpr * typeExpr ) { |
---|
758 | // if ( genC ) std::cerr << "typeexpr still exists: " << typeExpr << std::endl; |
---|
759 | // assertf( ! genC, "TypeExpr should not reach code generation." ); |
---|
760 | if ( ! genC ) { |
---|
761 | output<< genType( typeExpr->get_type(), "", pretty, genC ); |
---|
762 | } |
---|
763 | } |
---|
764 | |
---|
765 | void CodeGenerator::postvisit( AsmExpr * asmExpr ) { |
---|
766 | if ( asmExpr->get_inout() ) { |
---|
767 | output << "[ "; |
---|
768 | asmExpr->get_inout()->accept( *visitor ); |
---|
769 | output << " ] "; |
---|
770 | } // if |
---|
771 | asmExpr->get_constraint()->accept( *visitor ); |
---|
772 | output << " ( "; |
---|
773 | asmExpr->get_operand()->accept( *visitor ); |
---|
774 | output << " )"; |
---|
775 | } |
---|
776 | |
---|
777 | void CodeGenerator::postvisit( CompoundLiteralExpr *compLitExpr ) { |
---|
778 | assert( compLitExpr->get_result() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) ); |
---|
779 | output << "(" << genType( compLitExpr->get_result(), "", pretty, genC ) << ")"; |
---|
780 | compLitExpr->get_initializer()->accept( *visitor ); |
---|
781 | } |
---|
782 | |
---|
783 | void CodeGenerator::postvisit( UniqueExpr * unqExpr ) { |
---|
784 | assertf( ! genC, "Unique expressions should not reach code generation." ); |
---|
785 | output << "unq<" << unqExpr->get_id() << ">{ "; |
---|
786 | unqExpr->get_expr()->accept( *visitor ); |
---|
787 | output << " }"; |
---|
788 | } |
---|
789 | |
---|
790 | void CodeGenerator::postvisit( StmtExpr * stmtExpr ) { |
---|
791 | std::list< Statement * > & stmts = stmtExpr->statements->kids; |
---|
792 | output << "({" << endl; |
---|
793 | ++indent; |
---|
794 | unsigned int numStmts = stmts.size(); |
---|
795 | unsigned int i = 0; |
---|
796 | for ( Statement * stmt : stmts ) { |
---|
797 | output << indent << printLabels( stmt->get_labels() ); |
---|
798 | if ( i+1 == numStmts ) { |
---|
799 | // last statement in a statement expression needs to be handled specially - |
---|
800 | // cannot cast to void, otherwise the expression statement has no value |
---|
801 | if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) { |
---|
802 | exprStmt->expr->accept( *visitor ); |
---|
803 | output << ";" << endl; |
---|
804 | ++i; |
---|
805 | break; |
---|
806 | } |
---|
807 | } |
---|
808 | stmt->accept( *visitor ); |
---|
809 | output << endl; |
---|
810 | if ( wantSpacing( stmt ) ) { |
---|
811 | output << endl; |
---|
812 | } // if |
---|
813 | ++i; |
---|
814 | } |
---|
815 | --indent; |
---|
816 | output << indent << "})"; |
---|
817 | } |
---|
818 | |
---|
819 | void CodeGenerator::postvisit( ConstructorExpr * expr ) { |
---|
820 | assertf( ! genC, "Unique expressions should not reach code generation." ); |
---|
821 | expr->callExpr->accept( *visitor ); |
---|
822 | } |
---|
823 | |
---|
824 | void CodeGenerator::postvisit( DeletedExpr * expr ) { |
---|
825 | assertf( ! genC, "Deleted expressions should not reach code generation." ); |
---|
826 | expr->expr->accept( *visitor ); |
---|
827 | } |
---|
828 | |
---|
829 | // *** Statements |
---|
830 | void CodeGenerator::postvisit( CompoundStmt * compoundStmt ) { |
---|
831 | std::list<Statement*> ks = compoundStmt->get_kids(); |
---|
832 | output << "{" << endl; |
---|
833 | |
---|
834 | ++indent; |
---|
835 | |
---|
836 | for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) { |
---|
837 | output << indent << printLabels( (*i)->get_labels() ); |
---|
838 | (*i)->accept( *visitor ); |
---|
839 | |
---|
840 | output << endl; |
---|
841 | if ( wantSpacing( *i ) ) { |
---|
842 | output << endl; |
---|
843 | } // if |
---|
844 | } // for |
---|
845 | --indent; |
---|
846 | |
---|
847 | output << indent << "}"; |
---|
848 | } |
---|
849 | |
---|
850 | void CodeGenerator::postvisit( ExprStmt * exprStmt ) { |
---|
851 | assert( exprStmt ); |
---|
852 | if ( genC ) { |
---|
853 | // cast the top-level expression to void to reduce gcc warnings. |
---|
854 | exprStmt->set_expr( new CastExpr( exprStmt->get_expr() ) ); |
---|
855 | } |
---|
856 | exprStmt->get_expr()->accept( *visitor ); |
---|
857 | output << ";"; |
---|
858 | } |
---|
859 | |
---|
860 | void CodeGenerator::postvisit( AsmStmt * asmStmt ) { |
---|
861 | output << "asm "; |
---|
862 | if ( asmStmt->get_voltile() ) output << "volatile "; |
---|
863 | if ( ! asmStmt->get_gotolabels().empty() ) output << "goto "; |
---|
864 | output << "( "; |
---|
865 | if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *visitor ); |
---|
866 | output << " : "; |
---|
867 | genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() ); |
---|
868 | output << " : "; |
---|
869 | genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() ); |
---|
870 | output << " : "; |
---|
871 | genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() ); |
---|
872 | if ( ! asmStmt->get_gotolabels().empty() ) { |
---|
873 | output << " : "; |
---|
874 | for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) { |
---|
875 | output << *begin++; |
---|
876 | if ( begin == asmStmt->get_gotolabels().end() ) break; |
---|
877 | output << ", "; |
---|
878 | } // for |
---|
879 | } // if |
---|
880 | output << " );"; |
---|
881 | } |
---|
882 | |
---|
883 | void CodeGenerator::postvisit( AsmDecl * asmDecl ) { |
---|
884 | output << "asm "; |
---|
885 | AsmStmt * asmStmt = asmDecl->get_stmt(); |
---|
886 | output << "( "; |
---|
887 | if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *visitor ); |
---|
888 | output << " )"; |
---|
889 | } |
---|
890 | |
---|
891 | void CodeGenerator::postvisit( DirectiveStmt * dirStmt ) { |
---|
892 | output << endl << dirStmt->directive; // endl prevents spaces before directive |
---|
893 | } |
---|
894 | |
---|
895 | void CodeGenerator::postvisit( IfStmt * ifStmt ) { |
---|
896 | output << "if ( "; |
---|
897 | ifStmt->get_condition()->accept( *visitor ); |
---|
898 | output << " ) "; |
---|
899 | |
---|
900 | ifStmt->get_thenPart()->accept( *visitor ); |
---|
901 | |
---|
902 | if ( ifStmt->get_elsePart() != 0) { |
---|
903 | output << " else "; |
---|
904 | ifStmt->get_elsePart()->accept( *visitor ); |
---|
905 | } // if |
---|
906 | } |
---|
907 | |
---|
908 | void CodeGenerator::postvisit( SwitchStmt * switchStmt ) { |
---|
909 | output << "switch ( "; |
---|
910 | switchStmt->get_condition()->accept( *visitor ); |
---|
911 | output << " ) "; |
---|
912 | |
---|
913 | output << "{" << endl; |
---|
914 | ++indent; |
---|
915 | acceptAll( switchStmt->get_statements(), *visitor ); |
---|
916 | --indent; |
---|
917 | output << indent << "}"; |
---|
918 | } |
---|
919 | |
---|
920 | void CodeGenerator::postvisit( CaseStmt * caseStmt ) { |
---|
921 | updateLocation( caseStmt ); |
---|
922 | output << indent; |
---|
923 | if ( caseStmt->isDefault()) { |
---|
924 | output << "default"; |
---|
925 | } else { |
---|
926 | output << "case "; |
---|
927 | caseStmt->get_condition()->accept( *visitor ); |
---|
928 | } // if |
---|
929 | output << ":" << endl; |
---|
930 | |
---|
931 | std::list<Statement *> sts = caseStmt->get_statements(); |
---|
932 | |
---|
933 | ++indent; |
---|
934 | for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) { |
---|
935 | output << indent << printLabels( (*i)->get_labels() ) ; |
---|
936 | (*i)->accept( *visitor ); |
---|
937 | output << endl; |
---|
938 | } // for |
---|
939 | --indent; |
---|
940 | } |
---|
941 | |
---|
942 | void CodeGenerator::postvisit( BranchStmt * branchStmt ) { |
---|
943 | switch ( branchStmt->get_type()) { |
---|
944 | case BranchStmt::Goto: |
---|
945 | if ( ! branchStmt->get_target().empty() ) |
---|
946 | output << "goto " << branchStmt->get_target(); |
---|
947 | else { |
---|
948 | if ( branchStmt->get_computedTarget() != 0 ) { |
---|
949 | output << "goto *"; |
---|
950 | branchStmt->get_computedTarget()->accept( *visitor ); |
---|
951 | } // if |
---|
952 | } // if |
---|
953 | break; |
---|
954 | case BranchStmt::Break: |
---|
955 | output << "break"; |
---|
956 | break; |
---|
957 | case BranchStmt::Continue: |
---|
958 | output << "continue"; |
---|
959 | break; |
---|
960 | case BranchStmt::FallThrough: |
---|
961 | case BranchStmt::FallThroughDefault: |
---|
962 | assertf( ! genC, "fallthru should not reach code generation." ); |
---|
963 | output << "fallthru"; |
---|
964 | break; |
---|
965 | } // switch |
---|
966 | // print branch target for labelled break/continue/fallthru in debug mode |
---|
967 | if ( ! genC && branchStmt->get_type() != BranchStmt::Goto ) { |
---|
968 | if ( ! branchStmt->get_target().empty() ) { |
---|
969 | output << " " << branchStmt->get_target(); |
---|
970 | } else if ( branchStmt->get_type() == BranchStmt::FallThrough ) { |
---|
971 | output << " default"; |
---|
972 | } |
---|
973 | } |
---|
974 | output << ";"; |
---|
975 | } |
---|
976 | |
---|
977 | void CodeGenerator::postvisit( ReturnStmt * returnStmt ) { |
---|
978 | output << "return "; |
---|
979 | maybeAccept( returnStmt->get_expr(), *visitor ); |
---|
980 | output << ";"; |
---|
981 | } |
---|
982 | |
---|
983 | void CodeGenerator::postvisit( ThrowStmt * throwStmt ) { |
---|
984 | assertf( ! genC, "Throw statements should not reach code generation." ); |
---|
985 | |
---|
986 | output << ((throwStmt->get_kind() == ThrowStmt::Terminate) ? |
---|
987 | "throw" : "throwResume"); |
---|
988 | if (throwStmt->get_expr()) { |
---|
989 | output << " "; |
---|
990 | throwStmt->get_expr()->accept( *visitor ); |
---|
991 | } |
---|
992 | if (throwStmt->get_target()) { |
---|
993 | output << " _At "; |
---|
994 | throwStmt->get_target()->accept( *visitor ); |
---|
995 | } |
---|
996 | output << ";"; |
---|
997 | } |
---|
998 | void CodeGenerator::postvisit( CatchStmt * stmt ) { |
---|
999 | assertf( ! genC, "Catch statements should not reach code generation." ); |
---|
1000 | |
---|
1001 | output << ((stmt->get_kind() == CatchStmt::Terminate) ? |
---|
1002 | "catch" : "catchResume"); |
---|
1003 | output << "( "; |
---|
1004 | stmt->decl->accept( *visitor ); |
---|
1005 | output << " ) "; |
---|
1006 | |
---|
1007 | if( stmt->cond ) { |
---|
1008 | output << "if/when(?) ("; |
---|
1009 | stmt->cond->accept( *visitor ); |
---|
1010 | output << ") "; |
---|
1011 | } |
---|
1012 | stmt->body->accept( *visitor ); |
---|
1013 | } |
---|
1014 | |
---|
1015 | void CodeGenerator::postvisit( WaitForStmt * stmt ) { |
---|
1016 | assertf( ! genC, "Waitfor statements should not reach code generation." ); |
---|
1017 | |
---|
1018 | bool first = true; |
---|
1019 | for( auto & clause : stmt->clauses ) { |
---|
1020 | if(first) { output << "or "; first = false; } |
---|
1021 | if( clause.condition ) { |
---|
1022 | output << "when("; |
---|
1023 | stmt->timeout.condition->accept( *visitor ); |
---|
1024 | output << ") "; |
---|
1025 | } |
---|
1026 | output << "waitfor("; |
---|
1027 | clause.target.function->accept( *visitor ); |
---|
1028 | for( Expression * expr : clause.target.arguments ) { |
---|
1029 | output << ","; |
---|
1030 | expr->accept( *visitor ); |
---|
1031 | } |
---|
1032 | output << ") "; |
---|
1033 | clause.statement->accept( *visitor ); |
---|
1034 | } |
---|
1035 | |
---|
1036 | if( stmt->timeout.statement ) { |
---|
1037 | output << "or "; |
---|
1038 | if( stmt->timeout.condition ) { |
---|
1039 | output << "when("; |
---|
1040 | stmt->timeout.condition->accept( *visitor ); |
---|
1041 | output << ") "; |
---|
1042 | } |
---|
1043 | output << "timeout("; |
---|
1044 | stmt->timeout.time->accept( *visitor ); |
---|
1045 | output << ") "; |
---|
1046 | stmt->timeout.statement->accept( *visitor ); |
---|
1047 | } |
---|
1048 | |
---|
1049 | if( stmt->orelse.statement ) { |
---|
1050 | output << "or "; |
---|
1051 | if( stmt->orelse.condition ) { |
---|
1052 | output << "when("; |
---|
1053 | stmt->orelse.condition->accept( *visitor ); |
---|
1054 | output << ")"; |
---|
1055 | } |
---|
1056 | output << "else "; |
---|
1057 | stmt->orelse.statement->accept( *visitor ); |
---|
1058 | } |
---|
1059 | } |
---|
1060 | |
---|
1061 | void CodeGenerator::postvisit( WithStmt * with ) { |
---|
1062 | if ( ! genC ) { |
---|
1063 | output << "with ( "; |
---|
1064 | genCommaList( with->exprs.begin(), with->exprs.end() ); |
---|
1065 | output << " ) "; |
---|
1066 | } |
---|
1067 | with->stmt->accept( *visitor ); |
---|
1068 | } |
---|
1069 | |
---|
1070 | void CodeGenerator::postvisit( WhileStmt * whileStmt ) { |
---|
1071 | if ( whileStmt->get_isDoWhile() ) { |
---|
1072 | output << "do"; |
---|
1073 | } else { |
---|
1074 | output << "while ("; |
---|
1075 | whileStmt->get_condition()->accept( *visitor ); |
---|
1076 | output << ")"; |
---|
1077 | } // if |
---|
1078 | output << " "; |
---|
1079 | |
---|
1080 | output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() ); |
---|
1081 | whileStmt->get_body()->accept( *visitor ); |
---|
1082 | |
---|
1083 | output << indent; |
---|
1084 | |
---|
1085 | if ( whileStmt->get_isDoWhile() ) { |
---|
1086 | output << " while ("; |
---|
1087 | whileStmt->get_condition()->accept( *visitor ); |
---|
1088 | output << ");"; |
---|
1089 | } // if |
---|
1090 | } |
---|
1091 | |
---|
1092 | void CodeGenerator::postvisit( ForStmt * forStmt ) { |
---|
1093 | // initialization is always hoisted, so don't bother doing anything with that |
---|
1094 | output << "for (;"; |
---|
1095 | |
---|
1096 | if ( forStmt->get_condition() != 0 ) { |
---|
1097 | forStmt->get_condition()->accept( *visitor ); |
---|
1098 | } // if |
---|
1099 | output << ";"; |
---|
1100 | |
---|
1101 | if ( forStmt->get_increment() != 0 ) { |
---|
1102 | // cast the top-level expression to void to reduce gcc warnings. |
---|
1103 | Expression * expr = new CastExpr( forStmt->get_increment() ); |
---|
1104 | expr->accept( *visitor ); |
---|
1105 | } // if |
---|
1106 | output << ") "; |
---|
1107 | |
---|
1108 | if ( forStmt->get_body() != 0 ) { |
---|
1109 | output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() ); |
---|
1110 | forStmt->get_body()->accept( *visitor ); |
---|
1111 | } // if |
---|
1112 | } |
---|
1113 | |
---|
1114 | void CodeGenerator::postvisit( __attribute__((unused)) NullStmt * nullStmt ) { |
---|
1115 | //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() ); |
---|
1116 | output << "/* null statement */ ;"; |
---|
1117 | } |
---|
1118 | |
---|
1119 | void CodeGenerator::postvisit( DeclStmt * declStmt ) { |
---|
1120 | declStmt->get_decl()->accept( *visitor ); |
---|
1121 | |
---|
1122 | if ( doSemicolon( declStmt->get_decl() ) ) { |
---|
1123 | output << ";"; |
---|
1124 | } // if |
---|
1125 | } |
---|
1126 | |
---|
1127 | void CodeGenerator::postvisit( ImplicitCtorDtorStmt * stmt ) { |
---|
1128 | assertf( ! genC, "ImplicitCtorDtorStmts should not reach code generation." ); |
---|
1129 | stmt->callStmt->accept( *visitor ); |
---|
1130 | } |
---|
1131 | |
---|
1132 | void CodeGenerator::handleStorageClass( DeclarationWithType * decl ) { |
---|
1133 | if ( decl->get_storageClasses().any() ) { |
---|
1134 | decl->get_storageClasses().print( output ); |
---|
1135 | } // if |
---|
1136 | } // CodeGenerator::handleStorageClass |
---|
1137 | |
---|
1138 | std::string genName( DeclarationWithType * decl ) { |
---|
1139 | CodeGen::OperatorInfo opInfo; |
---|
1140 | if ( operatorLookup( decl->get_name(), opInfo ) ) { |
---|
1141 | return opInfo.outputName; |
---|
1142 | } else { |
---|
1143 | return decl->get_name(); |
---|
1144 | } // if |
---|
1145 | } |
---|
1146 | } // namespace CodeGen |
---|
1147 | |
---|
1148 | |
---|
1149 | unsigned Indenter::tabsize = 2; |
---|
1150 | |
---|
1151 | std::ostream & operator<<( std::ostream & out, const BaseSyntaxNode * node ) { |
---|
1152 | if ( node ) { |
---|
1153 | node->print( out ); |
---|
1154 | } else { |
---|
1155 | out << "nullptr"; |
---|
1156 | } |
---|
1157 | return out; |
---|
1158 | } |
---|
1159 | |
---|
1160 | // Local Variables: // |
---|
1161 | // tab-width: 4 // |
---|
1162 | // mode: c++ // |
---|
1163 | // compile-command: "make install" // |
---|
1164 | // End: // |
---|