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 : Fri Mar 12 19:00:42 2021 |
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13 | // Update Count : 536 |
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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 "SynTree/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 within a node should become the method of formating. |
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81 | void CodeGenerator::updateLocation( CodeLocation const & to ) { |
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82 | // skip if linemarks shouldn't appear or if codelocation is unset |
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83 | if ( !options.lineMarks || to.isUnset() ) return; |
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84 | |
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85 | if ( currentLocation.followedBy( to, 0 ) ) { |
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86 | return; |
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87 | } else if ( currentLocation.followedBy( to, 1 ) ) { |
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88 | output << "\n" << indent; |
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89 | currentLocation.first_line += 1; |
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90 | } else if ( currentLocation.followedBy( to, 2 ) ) { |
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91 | output << "\n\n" << indent; |
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92 | currentLocation.first_line += 2; |
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93 | } else { |
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94 | output << "\n# " << to.first_line << " \"" << to.filename |
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95 | << "\"\n" << indent; |
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96 | currentLocation = to; |
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97 | } |
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98 | output << std::flush; |
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99 | } |
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100 | |
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101 | void CodeGenerator::updateLocation( BaseSyntaxNode const * to ) { |
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102 | updateLocation( to->location ); |
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103 | } |
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104 | |
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105 | // replace endl |
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106 | ostream & CodeGenerator::LineEnder::operator()( ostream & os ) const { |
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107 | // if ( !cg.lineMarks ) { |
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108 | // os << "\n" << cg.indent << std::flush; |
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109 | // } |
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110 | os << "\n" << std::flush; |
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111 | cg.currentLocation.first_line++; |
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112 | // os << "/* did endl; current loc is: " << cg.currentLocation.first_line << "*/"; |
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113 | return os; |
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114 | } |
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115 | |
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116 | CodeGenerator::CodeGenerator( std::ostream & os, bool pretty, bool genC, bool lineMarks, bool printExprTypes ) : indent( 0, CodeGenerator::tabsize ), output( os ), printLabels( *this ), options( pretty, genC, lineMarks, printExprTypes ), endl( *this ) {} |
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117 | CodeGenerator::CodeGenerator( std::ostream & os, const Options &options ) : indent( 0, CodeGenerator::tabsize ), output( os ), printLabels( *this ), options(options), endl( *this ) {} |
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118 | |
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119 | string CodeGenerator::mangleName( DeclarationWithType * decl ) { |
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120 | // GCC builtins should always be printed unmangled |
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121 | if ( options.pretty || decl->linkage.is_gcc_builtin ) return decl->name; |
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122 | if ( LinkageSpec::isMangled(decl->linkage) && decl->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->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)->name; |
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135 | if ( ! (*attr)->parameters.empty() ) { |
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136 | output << "("; |
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137 | genCommaList( (*attr)->parameters.begin(), (*attr)->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 ( options.printExprTypes && node->result ) { |
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166 | output << " /* " << genType( node->result, "", options ) << " */ "; |
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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 | // deleted decls should never be used, so don't print them |
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174 | if ( functionDecl->isDeleted && options.genC ) return; |
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175 | extension( functionDecl ); |
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176 | genAttributes( functionDecl->get_attributes() ); |
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177 | |
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178 | handleStorageClass( functionDecl ); |
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179 | functionDecl->get_funcSpec().print( output ); |
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180 | |
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181 | Options subOptions = options; |
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182 | subOptions.anonymousUnused = functionDecl->has_body(); |
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183 | output << genType( functionDecl->get_functionType(), mangleName( functionDecl ), subOptions ); |
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184 | |
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185 | asmName( functionDecl ); |
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186 | |
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187 | if ( functionDecl->get_statements() ) { |
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188 | functionDecl->get_statements()->accept( *visitor ); |
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189 | } // if |
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190 | if ( functionDecl->isDeleted ) { |
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191 | output << " = void"; |
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192 | } |
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193 | } |
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194 | |
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195 | void CodeGenerator::postvisit( ObjectDecl * objectDecl ) { |
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196 | // deleted decls should never be used, so don't print them |
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197 | if ( objectDecl->isDeleted && options.genC ) return; |
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198 | |
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199 | // gcc allows an empty declarator (no name) for bit-fields and C states: 6.7.2.1 Structure and union specifiers, |
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200 | // point 4, page 113: If the (bit field) value is zero, the declaration shall have no declarator. For anything |
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201 | // else, the anonymous name refers to the anonymous object for plan9 inheritance. |
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202 | if ( objectDecl->get_name().empty() && options.genC && ! objectDecl->get_bitfieldWidth() ) { |
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203 | // only generate an anonymous name when generating C code, otherwise it clutters the output too much |
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204 | static UniqueName name = { "__anonymous_object" }; |
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205 | objectDecl->set_name( name.newName() ); |
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206 | // Stops unused parameter warnings. |
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207 | if ( options.anonymousUnused ) { |
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208 | objectDecl->attributes.push_back( new Attribute( "unused" ) ); |
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209 | } |
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210 | } |
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211 | |
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212 | extension( objectDecl ); |
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213 | genAttributes( objectDecl->get_attributes() ); |
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214 | |
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215 | handleStorageClass( objectDecl ); |
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216 | output << genType( objectDecl->get_type(), mangleName( objectDecl ), options.pretty, options.genC ); |
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217 | |
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218 | asmName( objectDecl ); |
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219 | |
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220 | if ( objectDecl->get_init() ) { |
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221 | output << " = "; |
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222 | objectDecl->get_init()->accept( *visitor ); |
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223 | } // if |
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224 | if ( objectDecl->isDeleted ) { |
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225 | output << " = void"; |
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226 | } |
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227 | |
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228 | if ( objectDecl->get_bitfieldWidth() ) { |
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229 | output << ":"; |
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230 | objectDecl->get_bitfieldWidth()->accept( *visitor ); |
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231 | } // if |
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232 | } |
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233 | |
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234 | void CodeGenerator::handleAggregate( AggregateDecl * aggDecl, const std::string & kind ) { |
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235 | if( ! aggDecl->parameters.empty() && ! options.genC ) { |
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236 | // assertf( ! genC, "Aggregate type parameters should not reach code generation." ); |
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237 | output << "forall("; |
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238 | genCommaList( aggDecl->parameters.begin(), aggDecl->parameters.end() ); |
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239 | output << ")" << endl; |
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240 | output << indent; |
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241 | } |
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242 | |
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243 | output << kind; |
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244 | genAttributes( aggDecl->attributes ); |
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245 | output << aggDecl->name; |
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246 | |
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247 | if ( aggDecl->has_body() ) { |
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248 | std::list< Declaration * > & memb = aggDecl->members; |
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249 | output << " {" << endl; |
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250 | |
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251 | ++indent; |
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252 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) { |
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253 | output << indent; |
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254 | (*i)->accept( *visitor ); |
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255 | output << ";" << endl; |
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256 | } // for |
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257 | |
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258 | --indent; |
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259 | |
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260 | output << indent << "}"; |
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261 | } // if |
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262 | } |
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263 | |
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264 | void CodeGenerator::postvisit( StructDecl * structDecl ) { |
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265 | extension( structDecl ); |
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266 | handleAggregate( structDecl, "struct " ); |
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267 | } |
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268 | |
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269 | void CodeGenerator::postvisit( UnionDecl * unionDecl ) { |
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270 | extension( unionDecl ); |
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271 | handleAggregate( unionDecl, "union " ); |
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272 | } |
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273 | |
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274 | void CodeGenerator::postvisit( EnumDecl * enumDecl ) { |
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275 | extension( enumDecl ); |
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276 | output << "enum "; |
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277 | genAttributes( enumDecl->get_attributes() ); |
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278 | |
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279 | output << enumDecl->get_name(); |
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280 | |
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281 | std::list< Declaration* > &memb = enumDecl->get_members(); |
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282 | |
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283 | if ( ! memb.empty() ) { |
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284 | output << " {" << endl; |
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285 | |
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286 | ++indent; |
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287 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) { |
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288 | ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i ); |
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289 | assert( obj ); |
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290 | output << indent << mangleName( obj ); |
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291 | if ( obj->get_init() ) { |
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292 | output << " = "; |
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293 | obj->get_init()->accept( *visitor ); |
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294 | } // if |
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295 | output << "," << endl; |
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296 | } // for |
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297 | |
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298 | --indent; |
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299 | |
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300 | output << indent << "}"; |
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301 | } // if |
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302 | } |
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303 | |
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304 | void CodeGenerator::postvisit( TraitDecl * traitDecl ) { |
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305 | assertf( ! options.genC, "TraitDecls should not reach code generation." ); |
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306 | extension( traitDecl ); |
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307 | handleAggregate( traitDecl, "trait " ); |
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308 | } |
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309 | |
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310 | void CodeGenerator::postvisit( TypedefDecl * typeDecl ) { |
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311 | assertf( ! options.genC, "Typedefs are removed and substituted in earlier passes." ); |
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312 | output << "typedef "; |
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313 | output << genType( typeDecl->get_base(), typeDecl->get_name(), options ) << endl; |
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314 | } |
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315 | |
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316 | void CodeGenerator::postvisit( TypeDecl * typeDecl ) { |
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317 | assertf( ! options.genC, "TypeDecls should not reach code generation." ); |
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318 | output << typeDecl->genTypeString() << " " << typeDecl->name; |
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319 | if ( typeDecl->sized ) { |
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320 | output << " | sized(" << typeDecl->name << ")"; |
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321 | } |
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322 | if ( ! typeDecl->assertions.empty() ) { |
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323 | output << " | { "; |
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324 | for ( DeclarationWithType * assert : typeDecl->assertions ) { |
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325 | assert->accept( *visitor ); |
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326 | output << "; "; |
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327 | } |
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328 | output << " }"; |
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329 | } |
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330 | } |
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331 | |
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332 | void CodeGenerator::postvisit( StaticAssertDecl * assertDecl ) { |
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333 | output << "_Static_assert("; |
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334 | assertDecl->condition->accept( *visitor ); |
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335 | output << ", "; |
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336 | assertDecl->message->accept( *visitor ); |
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337 | output << ")"; |
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338 | } |
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339 | |
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340 | void CodeGenerator::postvisit( Designation * designation ) { |
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341 | std::list< Expression * > designators = designation->get_designators(); |
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342 | if ( designators.size() == 0 ) return; |
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343 | for ( Expression * des : designators ) { |
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344 | if ( dynamic_cast< NameExpr * >( des ) || dynamic_cast< VariableExpr * >( des ) ) { |
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345 | // if expression is a NameExpr or VariableExpr, then initializing aggregate member |
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346 | output << "."; |
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347 | des->accept( *visitor ); |
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348 | } else { |
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349 | // otherwise, it has to be a ConstantExpr or CastExpr, initializing array eleemnt |
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350 | output << "["; |
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351 | des->accept( *visitor ); |
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352 | output << "]"; |
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353 | } // if |
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354 | } // for |
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355 | output << " = "; |
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356 | } |
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357 | |
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358 | void CodeGenerator::postvisit( SingleInit * init ) { |
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359 | init->get_value()->accept( *visitor ); |
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360 | } |
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361 | |
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362 | void CodeGenerator::postvisit( ListInit * init ) { |
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363 | auto initBegin = init->begin(); |
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364 | auto initEnd = init->end(); |
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365 | auto desigBegin = init->get_designations().begin(); |
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366 | auto desigEnd = init->get_designations().end(); |
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367 | |
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368 | output << "{ "; |
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369 | for ( ; initBegin != initEnd && desigBegin != desigEnd; ) { |
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370 | (*desigBegin)->accept( *visitor ); |
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371 | (*initBegin)->accept( *visitor ); |
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372 | ++initBegin, ++desigBegin; |
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373 | if ( initBegin != initEnd ) { |
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374 | output << ", "; |
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375 | } |
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376 | } |
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377 | output << " }"; |
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378 | assertf( initBegin == initEnd && desigBegin == desigEnd, "Initializers and designators not the same length. %s", toString( init ).c_str() ); |
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379 | } |
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380 | |
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381 | void CodeGenerator::postvisit( ConstructorInit * init ){ |
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382 | assertf( ! options.genC, "ConstructorInit nodes should not reach code generation." ); |
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383 | // pseudo-output for constructor/destructor pairs |
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384 | output << "<ctorinit>{" << endl << ++indent << "ctor: "; |
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385 | maybeAccept( init->get_ctor(), *visitor ); |
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386 | output << ", " << endl << indent << "dtor: "; |
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387 | maybeAccept( init->get_dtor(), *visitor ); |
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388 | output << endl << --indent << "}"; |
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389 | } |
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390 | |
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391 | void CodeGenerator::postvisit( Constant * constant ) { |
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392 | output << constant->get_value(); |
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393 | } |
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394 | |
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395 | // *** Expressions |
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396 | void CodeGenerator::postvisit( ApplicationExpr * applicationExpr ) { |
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397 | extension( applicationExpr ); |
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398 | if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) { |
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399 | const OperatorInfo * opInfo; |
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400 | if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && ( opInfo = operatorLookup( varExpr->get_var()->get_name() ) ) ) { |
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401 | std::list< Expression* >::iterator arg = applicationExpr->get_args().begin(); |
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402 | switch ( opInfo->type ) { |
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403 | case OT_INDEX: |
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404 | assert( applicationExpr->get_args().size() == 2 ); |
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405 | (*arg++)->accept( *visitor ); |
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406 | output << "["; |
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407 | (*arg)->accept( *visitor ); |
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408 | output << "]"; |
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409 | break; |
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410 | |
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411 | case OT_CALL: |
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412 | // there are no intrinsic definitions of the function call operator |
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413 | assert( false ); |
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414 | break; |
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415 | |
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416 | case OT_CTOR: |
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417 | case OT_DTOR: |
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418 | if ( applicationExpr->get_args().size() == 1 ) { |
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419 | // the expression fed into a single parameter constructor or destructor may contain side |
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420 | // effects, so must still output this expression |
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421 | output << "("; |
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422 | (*arg++)->accept( *visitor ); |
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423 | output << ") /* " << opInfo->inputName << " */"; |
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424 | } else if ( applicationExpr->get_args().size() == 2 ) { |
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425 | // intrinsic two parameter constructors are essentially bitwise assignment |
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426 | output << "("; |
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427 | (*arg++)->accept( *visitor ); |
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428 | output << opInfo->symbol; |
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429 | (*arg)->accept( *visitor ); |
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430 | output << ") /* " << opInfo->inputName << " */"; |
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431 | } else { |
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432 | // no constructors with 0 or more than 2 parameters |
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433 | assert( false ); |
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434 | } // if |
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435 | break; |
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436 | |
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437 | case OT_PREFIX: |
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438 | case OT_PREFIXASSIGN: |
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439 | assert( applicationExpr->get_args().size() == 1 ); |
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440 | output << "("; |
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441 | output << opInfo->symbol; |
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442 | (*arg)->accept( *visitor ); |
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443 | output << ")"; |
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444 | break; |
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445 | |
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446 | case OT_POSTFIX: |
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447 | case OT_POSTFIXASSIGN: |
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448 | assert( applicationExpr->get_args().size() == 1 ); |
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449 | (*arg)->accept( *visitor ); |
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450 | output << opInfo->symbol; |
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451 | break; |
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452 | |
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453 | |
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454 | case OT_INFIX: |
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455 | case OT_INFIXASSIGN: |
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456 | assert( applicationExpr->get_args().size() == 2 ); |
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457 | output << "("; |
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458 | (*arg++)->accept( *visitor ); |
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459 | output << opInfo->symbol; |
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460 | (*arg)->accept( *visitor ); |
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461 | output << ")"; |
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462 | break; |
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463 | |
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464 | case OT_CONSTANT: |
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465 | case OT_LABELADDRESS: |
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466 | // there are no intrinsic definitions of 0/1 or label addresses as functions |
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467 | assert( false ); |
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468 | } // switch |
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469 | } else { |
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470 | varExpr->accept( *visitor ); |
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471 | output << "("; |
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472 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
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473 | output << ")"; |
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474 | } // if |
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475 | } else { |
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476 | applicationExpr->get_function()->accept( *visitor ); |
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477 | output << "("; |
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478 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
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479 | output << ")"; |
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480 | } // if |
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481 | } |
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482 | |
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483 | void CodeGenerator::postvisit( UntypedExpr * untypedExpr ) { |
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484 | extension( untypedExpr ); |
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485 | if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->function ) ) { |
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486 | const OperatorInfo * opInfo = operatorLookup( nameExpr->name ); |
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487 | if ( opInfo ) { |
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488 | std::list< Expression* >::iterator arg = untypedExpr->args.begin(); |
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489 | switch ( opInfo->type ) { |
---|
490 | case OT_INDEX: |
---|
491 | assert( untypedExpr->args.size() == 2 ); |
---|
492 | (*arg++)->accept( *visitor ); |
---|
493 | output << "["; |
---|
494 | (*arg)->accept( *visitor ); |
---|
495 | output << "]"; |
---|
496 | break; |
---|
497 | |
---|
498 | case OT_CALL: |
---|
499 | assert( false ); |
---|
500 | |
---|
501 | case OT_CTOR: |
---|
502 | case OT_DTOR: |
---|
503 | if ( untypedExpr->args.size() == 1 ) { |
---|
504 | // the expression fed into a single parameter constructor or destructor may contain side |
---|
505 | // effects, so must still output this expression |
---|
506 | output << "("; |
---|
507 | (*arg++)->accept( *visitor ); |
---|
508 | output << ") /* " << opInfo->inputName << " */"; |
---|
509 | } else if ( untypedExpr->get_args().size() == 2 ) { |
---|
510 | // intrinsic two parameter constructors are essentially bitwise assignment |
---|
511 | output << "("; |
---|
512 | (*arg++)->accept( *visitor ); |
---|
513 | output << opInfo->symbol; |
---|
514 | (*arg)->accept( *visitor ); |
---|
515 | output << ") /* " << opInfo->inputName << " */"; |
---|
516 | } else { |
---|
517 | // no constructors with 0 or more than 2 parameters |
---|
518 | assertf( ! options.genC, "UntypedExpr constructor/destructor with 0 or more than 2 parameters." ); |
---|
519 | output << "("; |
---|
520 | (*arg++)->accept( *visitor ); |
---|
521 | output << opInfo->symbol << "{ "; |
---|
522 | genCommaList( arg, untypedExpr->args.end() ); |
---|
523 | output << "}) /* " << opInfo->inputName << " */"; |
---|
524 | } // if |
---|
525 | break; |
---|
526 | |
---|
527 | case OT_PREFIX: |
---|
528 | case OT_PREFIXASSIGN: |
---|
529 | case OT_LABELADDRESS: |
---|
530 | assert( untypedExpr->args.size() == 1 ); |
---|
531 | output << "("; |
---|
532 | output << opInfo->symbol; |
---|
533 | (*arg)->accept( *visitor ); |
---|
534 | output << ")"; |
---|
535 | break; |
---|
536 | |
---|
537 | case OT_POSTFIX: |
---|
538 | case OT_POSTFIXASSIGN: |
---|
539 | assert( untypedExpr->args.size() == 1 ); |
---|
540 | (*arg)->accept( *visitor ); |
---|
541 | output << opInfo->symbol; |
---|
542 | break; |
---|
543 | |
---|
544 | case OT_INFIX: |
---|
545 | case OT_INFIXASSIGN: |
---|
546 | assert( untypedExpr->args.size() == 2 ); |
---|
547 | output << "("; |
---|
548 | (*arg++)->accept( *visitor ); |
---|
549 | output << opInfo->symbol; |
---|
550 | (*arg)->accept( *visitor ); |
---|
551 | output << ")"; |
---|
552 | break; |
---|
553 | |
---|
554 | case OT_CONSTANT: |
---|
555 | // there are no intrinsic definitions of 0 or 1 as functions |
---|
556 | assert( false ); |
---|
557 | } // switch |
---|
558 | } else { |
---|
559 | // builtin routines |
---|
560 | nameExpr->accept( *visitor ); |
---|
561 | output << "("; |
---|
562 | genCommaList( untypedExpr->args.begin(), untypedExpr->args.end() ); |
---|
563 | output << ")"; |
---|
564 | } // if |
---|
565 | } else { |
---|
566 | untypedExpr->function->accept( *visitor ); |
---|
567 | output << "("; |
---|
568 | genCommaList( untypedExpr->args.begin(), untypedExpr->args.end() ); |
---|
569 | output << ")"; |
---|
570 | } // if |
---|
571 | } |
---|
572 | |
---|
573 | void CodeGenerator::postvisit( RangeExpr * rangeExpr ) { |
---|
574 | rangeExpr->low->accept( *visitor ); |
---|
575 | output << " ... "; |
---|
576 | rangeExpr->high->accept( *visitor ); |
---|
577 | } |
---|
578 | |
---|
579 | void CodeGenerator::postvisit( NameExpr * nameExpr ) { |
---|
580 | extension( nameExpr ); |
---|
581 | const OperatorInfo * opInfo = operatorLookup( nameExpr->name ); |
---|
582 | if ( opInfo ) { |
---|
583 | if ( opInfo->type == OT_CONSTANT ) { |
---|
584 | output << opInfo->symbol; |
---|
585 | } else { |
---|
586 | output << opInfo->outputName; |
---|
587 | } |
---|
588 | } else { |
---|
589 | output << nameExpr->get_name(); |
---|
590 | } // if |
---|
591 | } |
---|
592 | |
---|
593 | void CodeGenerator::postvisit( DimensionExpr * dimensionExpr ) { |
---|
594 | extension( dimensionExpr ); |
---|
595 | output << "/*non-type*/" << dimensionExpr->get_name(); |
---|
596 | } |
---|
597 | |
---|
598 | void CodeGenerator::postvisit( AddressExpr * addressExpr ) { |
---|
599 | extension( addressExpr ); |
---|
600 | output << "(&"; |
---|
601 | addressExpr->arg->accept( *visitor ); |
---|
602 | output << ")"; |
---|
603 | } |
---|
604 | |
---|
605 | void CodeGenerator::postvisit( LabelAddressExpr *addressExpr ) { |
---|
606 | extension( addressExpr ); |
---|
607 | output << "(&&" << addressExpr->arg << ")"; |
---|
608 | } |
---|
609 | |
---|
610 | void CodeGenerator::postvisit( CastExpr * castExpr ) { |
---|
611 | extension( castExpr ); |
---|
612 | output << "("; |
---|
613 | if ( castExpr->get_result()->isVoid() ) { |
---|
614 | output << "(void)"; |
---|
615 | } else { |
---|
616 | // at least one result type of cast. |
---|
617 | // Note: previously, lvalue casts were skipped. Since it's now impossible for the user to write |
---|
618 | // an lvalue cast, this has been taken out. |
---|
619 | output << "("; |
---|
620 | output << genType( castExpr->get_result(), "", options ); |
---|
621 | output << ")"; |
---|
622 | } // if |
---|
623 | castExpr->arg->accept( *visitor ); |
---|
624 | output << ")"; |
---|
625 | } |
---|
626 | |
---|
627 | void CodeGenerator::postvisit( KeywordCastExpr * castExpr ) { |
---|
628 | assertf( ! options.genC, "KeywordCast should not reach code generation." ); |
---|
629 | extension( castExpr ); |
---|
630 | output << "((" << castExpr->targetString() << " &)"; |
---|
631 | castExpr->arg->accept( *visitor ); |
---|
632 | output << ")"; |
---|
633 | } |
---|
634 | |
---|
635 | void CodeGenerator::postvisit( VirtualCastExpr * castExpr ) { |
---|
636 | assertf( ! options.genC, "VirtualCastExpr should not reach code generation." ); |
---|
637 | extension( castExpr ); |
---|
638 | output << "(virtual "; |
---|
639 | castExpr->get_arg()->accept( *visitor ); |
---|
640 | output << ")"; |
---|
641 | } |
---|
642 | |
---|
643 | void CodeGenerator::postvisit( UntypedMemberExpr * memberExpr ) { |
---|
644 | assertf( ! options.genC, "UntypedMemberExpr should not reach code generation." ); |
---|
645 | extension( memberExpr ); |
---|
646 | memberExpr->get_aggregate()->accept( *visitor ); |
---|
647 | output << "."; |
---|
648 | memberExpr->get_member()->accept( *visitor ); |
---|
649 | } |
---|
650 | |
---|
651 | void CodeGenerator::postvisit( MemberExpr * memberExpr ) { |
---|
652 | extension( memberExpr ); |
---|
653 | memberExpr->get_aggregate()->accept( *visitor ); |
---|
654 | output << "." << mangleName( memberExpr->get_member() ); |
---|
655 | } |
---|
656 | |
---|
657 | void CodeGenerator::postvisit( VariableExpr * variableExpr ) { |
---|
658 | extension( variableExpr ); |
---|
659 | const OperatorInfo * opInfo; |
---|
660 | if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && (opInfo = operatorLookup( variableExpr->get_var()->get_name() )) && opInfo->type == OT_CONSTANT ) { |
---|
661 | output << opInfo->symbol; |
---|
662 | } else { |
---|
663 | output << mangleName( variableExpr->get_var() ); |
---|
664 | } // if |
---|
665 | } |
---|
666 | |
---|
667 | void CodeGenerator::postvisit( ConstantExpr * constantExpr ) { |
---|
668 | assert( constantExpr->get_constant() ); |
---|
669 | extension( constantExpr ); |
---|
670 | constantExpr->get_constant()->accept( *visitor ); |
---|
671 | } |
---|
672 | |
---|
673 | void CodeGenerator::postvisit( SizeofExpr * sizeofExpr ) { |
---|
674 | extension( sizeofExpr ); |
---|
675 | output << "sizeof("; |
---|
676 | if ( sizeofExpr->get_isType() ) { |
---|
677 | output << genType( sizeofExpr->get_type(), "", options ); |
---|
678 | } else { |
---|
679 | sizeofExpr->get_expr()->accept( *visitor ); |
---|
680 | } // if |
---|
681 | output << ")"; |
---|
682 | } |
---|
683 | |
---|
684 | void CodeGenerator::postvisit( AlignofExpr * alignofExpr ) { |
---|
685 | // use GCC extension to avoid bumping std to C11 |
---|
686 | extension( alignofExpr ); |
---|
687 | output << "__alignof__("; |
---|
688 | if ( alignofExpr->get_isType() ) { |
---|
689 | output << genType( alignofExpr->get_type(), "", options ); |
---|
690 | } else { |
---|
691 | alignofExpr->get_expr()->accept( *visitor ); |
---|
692 | } // if |
---|
693 | output << ")"; |
---|
694 | } |
---|
695 | |
---|
696 | void CodeGenerator::postvisit( UntypedOffsetofExpr * offsetofExpr ) { |
---|
697 | assertf( ! options.genC, "UntypedOffsetofExpr should not reach code generation." ); |
---|
698 | output << "offsetof("; |
---|
699 | output << genType( offsetofExpr->get_type(), "", options ); |
---|
700 | output << ", " << offsetofExpr->get_member(); |
---|
701 | output << ")"; |
---|
702 | } |
---|
703 | |
---|
704 | void CodeGenerator::postvisit( OffsetofExpr * offsetofExpr ) { |
---|
705 | // use GCC builtin |
---|
706 | output << "__builtin_offsetof("; |
---|
707 | output << genType( offsetofExpr->get_type(), "", options ); |
---|
708 | output << ", " << mangleName( offsetofExpr->get_member() ); |
---|
709 | output << ")"; |
---|
710 | } |
---|
711 | |
---|
712 | void CodeGenerator::postvisit( OffsetPackExpr * offsetPackExpr ) { |
---|
713 | assertf( ! options.genC, "OffsetPackExpr should not reach code generation." ); |
---|
714 | output << "__CFA_offsetpack(" << genType( offsetPackExpr->get_type(), "", options ) << ")"; |
---|
715 | } |
---|
716 | |
---|
717 | void CodeGenerator::postvisit( LogicalExpr * logicalExpr ) { |
---|
718 | extension( logicalExpr ); |
---|
719 | output << "("; |
---|
720 | logicalExpr->get_arg1()->accept( *visitor ); |
---|
721 | if ( logicalExpr->get_isAnd() ) { |
---|
722 | output << " && "; |
---|
723 | } else { |
---|
724 | output << " || "; |
---|
725 | } // if |
---|
726 | logicalExpr->get_arg2()->accept( *visitor ); |
---|
727 | output << ")"; |
---|
728 | } |
---|
729 | |
---|
730 | void CodeGenerator::postvisit( ConditionalExpr * conditionalExpr ) { |
---|
731 | extension( conditionalExpr ); |
---|
732 | output << "("; |
---|
733 | conditionalExpr->get_arg1()->accept( *visitor ); |
---|
734 | output << " ? "; |
---|
735 | conditionalExpr->get_arg2()->accept( *visitor ); |
---|
736 | output << " : "; |
---|
737 | conditionalExpr->get_arg3()->accept( *visitor ); |
---|
738 | output << ")"; |
---|
739 | } |
---|
740 | |
---|
741 | void CodeGenerator::postvisit( CommaExpr * commaExpr ) { |
---|
742 | extension( commaExpr ); |
---|
743 | output << "("; |
---|
744 | if ( options.genC ) { |
---|
745 | // arg1 of a CommaExpr is never used, so it can be safely cast to void to reduce gcc warnings. |
---|
746 | commaExpr->set_arg1( new CastExpr( commaExpr->get_arg1() ) ); |
---|
747 | } |
---|
748 | commaExpr->get_arg1()->accept( *visitor ); |
---|
749 | output << " , "; |
---|
750 | commaExpr->get_arg2()->accept( *visitor ); |
---|
751 | output << ")"; |
---|
752 | } |
---|
753 | |
---|
754 | void CodeGenerator::postvisit( TupleAssignExpr * tupleExpr ) { |
---|
755 | assertf( ! options.genC, "TupleAssignExpr should not reach code generation." ); |
---|
756 | tupleExpr->stmtExpr->accept( *visitor ); |
---|
757 | } |
---|
758 | |
---|
759 | void CodeGenerator::postvisit( UntypedTupleExpr * tupleExpr ) { |
---|
760 | assertf( ! options.genC, "UntypedTupleExpr should not reach code generation." ); |
---|
761 | extension( tupleExpr ); |
---|
762 | output << "["; |
---|
763 | genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() ); |
---|
764 | output << "]"; |
---|
765 | } |
---|
766 | |
---|
767 | void CodeGenerator::postvisit( TupleExpr * tupleExpr ) { |
---|
768 | assertf( ! options.genC, "TupleExpr should not reach code generation." ); |
---|
769 | extension( tupleExpr ); |
---|
770 | output << "["; |
---|
771 | genCommaList( tupleExpr->get_exprs().begin(), tupleExpr->get_exprs().end() ); |
---|
772 | output << "]"; |
---|
773 | } |
---|
774 | |
---|
775 | void CodeGenerator::postvisit( TupleIndexExpr * tupleExpr ) { |
---|
776 | assertf( ! options.genC, "TupleIndexExpr should not reach code generation." ); |
---|
777 | extension( tupleExpr ); |
---|
778 | tupleExpr->get_tuple()->accept( *visitor ); |
---|
779 | output << "." << tupleExpr->get_index(); |
---|
780 | } |
---|
781 | |
---|
782 | void CodeGenerator::postvisit( TypeExpr * typeExpr ) { |
---|
783 | // if ( options.genC ) std::cerr << "typeexpr still exists: " << typeExpr << std::endl; |
---|
784 | // assertf( ! options.genC, "TypeExpr should not reach code generation." ); |
---|
785 | if ( ! options.genC ) { |
---|
786 | output << genType( typeExpr->get_type(), "", options ); |
---|
787 | } |
---|
788 | } |
---|
789 | |
---|
790 | void CodeGenerator::postvisit( AsmExpr * asmExpr ) { |
---|
791 | if ( !asmExpr->inout.empty() ) { |
---|
792 | output << "[ "; |
---|
793 | output << asmExpr->inout; |
---|
794 | output << " ] "; |
---|
795 | } // if |
---|
796 | asmExpr->constraint->accept( *visitor ); |
---|
797 | output << " ( "; |
---|
798 | asmExpr->operand->accept( *visitor ); |
---|
799 | output << " )"; |
---|
800 | } |
---|
801 | |
---|
802 | void CodeGenerator::postvisit( CompoundLiteralExpr *compLitExpr ) { |
---|
803 | assert( compLitExpr->get_result() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) ); |
---|
804 | output << "(" << genType( compLitExpr->get_result(), "", options ) << ")"; |
---|
805 | compLitExpr->get_initializer()->accept( *visitor ); |
---|
806 | } |
---|
807 | |
---|
808 | void CodeGenerator::postvisit( UniqueExpr * unqExpr ) { |
---|
809 | assertf( ! options.genC, "Unique expressions should not reach code generation." ); |
---|
810 | output << "unq<" << unqExpr->get_id() << ">{ "; |
---|
811 | unqExpr->get_expr()->accept( *visitor ); |
---|
812 | output << " }"; |
---|
813 | } |
---|
814 | |
---|
815 | void CodeGenerator::postvisit( StmtExpr * stmtExpr ) { |
---|
816 | std::list< Statement * > & stmts = stmtExpr->statements->kids; |
---|
817 | output << "({" << endl; |
---|
818 | ++indent; |
---|
819 | unsigned int numStmts = stmts.size(); |
---|
820 | unsigned int i = 0; |
---|
821 | for ( Statement * stmt : stmts ) { |
---|
822 | output << indent << printLabels( stmt->get_labels() ); |
---|
823 | if ( i+1 == numStmts ) { |
---|
824 | // last statement in a statement expression needs to be handled specially - |
---|
825 | // cannot cast to void, otherwise the expression statement has no value |
---|
826 | if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) { |
---|
827 | exprStmt->expr->accept( *visitor ); |
---|
828 | output << ";" << endl; |
---|
829 | ++i; |
---|
830 | break; |
---|
831 | } |
---|
832 | } |
---|
833 | stmt->accept( *visitor ); |
---|
834 | output << endl; |
---|
835 | if ( wantSpacing( stmt ) ) { |
---|
836 | output << endl; |
---|
837 | } // if |
---|
838 | ++i; |
---|
839 | } |
---|
840 | --indent; |
---|
841 | output << indent << "})"; |
---|
842 | } |
---|
843 | |
---|
844 | void CodeGenerator::postvisit( ConstructorExpr * expr ) { |
---|
845 | assertf( ! options.genC, "Unique expressions should not reach code generation." ); |
---|
846 | expr->callExpr->accept( *visitor ); |
---|
847 | } |
---|
848 | |
---|
849 | void CodeGenerator::postvisit( DeletedExpr * expr ) { |
---|
850 | assertf( ! options.genC, "Deleted expressions should not reach code generation." ); |
---|
851 | expr->expr->accept( *visitor ); |
---|
852 | } |
---|
853 | |
---|
854 | void CodeGenerator::postvisit( DefaultArgExpr * arg ) { |
---|
855 | assertf( ! options.genC, "Default argument expressions should not reach code generation." ); |
---|
856 | arg->expr->accept( *visitor ); |
---|
857 | } |
---|
858 | |
---|
859 | void CodeGenerator::postvisit( GenericExpr * expr ) { |
---|
860 | assertf( ! options.genC, "C11 _Generic expressions should not reach code generation." ); |
---|
861 | output << "_Generic("; |
---|
862 | expr->control->accept( *visitor ); |
---|
863 | output << ", "; |
---|
864 | unsigned int numAssocs = expr->associations.size(); |
---|
865 | unsigned int i = 0; |
---|
866 | for ( GenericExpr::Association & assoc : expr->associations ) { |
---|
867 | if (assoc.isDefault) { |
---|
868 | output << "default: "; |
---|
869 | } else { |
---|
870 | output << genType( assoc.type, "", options ) << ": "; |
---|
871 | } |
---|
872 | assoc.expr->accept( *visitor ); |
---|
873 | if ( i+1 != numAssocs ) { |
---|
874 | output << ", "; |
---|
875 | } |
---|
876 | i++; |
---|
877 | } |
---|
878 | output << ")"; |
---|
879 | } |
---|
880 | |
---|
881 | |
---|
882 | // *** Statements |
---|
883 | void CodeGenerator::postvisit( CompoundStmt * compoundStmt ) { |
---|
884 | std::list<Statement*> ks = compoundStmt->get_kids(); |
---|
885 | output << "{" << endl; |
---|
886 | |
---|
887 | ++indent; |
---|
888 | |
---|
889 | for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) { |
---|
890 | output << indent << printLabels( (*i)->get_labels() ); |
---|
891 | (*i)->accept( *visitor ); |
---|
892 | |
---|
893 | output << endl; |
---|
894 | if ( wantSpacing( *i ) ) { |
---|
895 | output << endl; |
---|
896 | } // if |
---|
897 | } // for |
---|
898 | --indent; |
---|
899 | |
---|
900 | output << indent << "}"; |
---|
901 | } |
---|
902 | |
---|
903 | void CodeGenerator::postvisit( ExprStmt * exprStmt ) { |
---|
904 | assert( exprStmt ); |
---|
905 | if ( options.genC ) { |
---|
906 | // cast the top-level expression to void to reduce gcc warnings. |
---|
907 | exprStmt->set_expr( new CastExpr( exprStmt->get_expr() ) ); |
---|
908 | } |
---|
909 | exprStmt->get_expr()->accept( *visitor ); |
---|
910 | output << ";"; |
---|
911 | } |
---|
912 | |
---|
913 | void CodeGenerator::postvisit( AsmStmt * asmStmt ) { |
---|
914 | output << "asm "; |
---|
915 | if ( asmStmt->get_voltile() ) output << "volatile "; |
---|
916 | if ( ! asmStmt->get_gotolabels().empty() ) output << "goto "; |
---|
917 | output << "( "; |
---|
918 | if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *visitor ); |
---|
919 | output << " : "; |
---|
920 | genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() ); |
---|
921 | output << " : "; |
---|
922 | genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() ); |
---|
923 | output << " : "; |
---|
924 | genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() ); |
---|
925 | if ( ! asmStmt->get_gotolabels().empty() ) { |
---|
926 | output << " : "; |
---|
927 | for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) { |
---|
928 | output << *begin++; |
---|
929 | if ( begin == asmStmt->get_gotolabels().end() ) break; |
---|
930 | output << ", "; |
---|
931 | } // for |
---|
932 | } // if |
---|
933 | output << " );"; |
---|
934 | } |
---|
935 | |
---|
936 | void CodeGenerator::postvisit( AsmDecl * asmDecl ) { |
---|
937 | output << "asm "; |
---|
938 | AsmStmt * asmStmt = asmDecl->get_stmt(); |
---|
939 | output << "( "; |
---|
940 | if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *visitor ); |
---|
941 | output << " )"; |
---|
942 | } |
---|
943 | |
---|
944 | void CodeGenerator::postvisit( DirectiveDecl * directiveDecl ) { |
---|
945 | output << endl << directiveDecl->get_stmt()->directive; // endl prevents spaces before directive |
---|
946 | } |
---|
947 | |
---|
948 | void CodeGenerator::postvisit( DirectiveStmt * dirStmt ) { |
---|
949 | output << endl << dirStmt->directive; // endl prevents spaces before directive |
---|
950 | } |
---|
951 | |
---|
952 | void CodeGenerator::postvisit( IfStmt * ifStmt ) { |
---|
953 | output << "if ( "; |
---|
954 | ifStmt->get_condition()->accept( *visitor ); |
---|
955 | output << " ) "; |
---|
956 | |
---|
957 | ifStmt->get_thenPart()->accept( *visitor ); |
---|
958 | |
---|
959 | if ( ifStmt->get_elsePart() != 0) { |
---|
960 | output << " else "; |
---|
961 | ifStmt->get_elsePart()->accept( *visitor ); |
---|
962 | } // if |
---|
963 | } |
---|
964 | |
---|
965 | void CodeGenerator::postvisit( SwitchStmt * switchStmt ) { |
---|
966 | output << "switch ( "; |
---|
967 | switchStmt->get_condition()->accept( *visitor ); |
---|
968 | output << " ) "; |
---|
969 | |
---|
970 | output << "{" << endl; |
---|
971 | ++indent; |
---|
972 | acceptAll( switchStmt->get_statements(), *visitor ); |
---|
973 | --indent; |
---|
974 | output << indent << "}"; |
---|
975 | } |
---|
976 | |
---|
977 | void CodeGenerator::postvisit( CaseStmt * caseStmt ) { |
---|
978 | updateLocation( caseStmt ); |
---|
979 | output << indent; |
---|
980 | if ( caseStmt->isDefault()) { |
---|
981 | output << "default"; |
---|
982 | } else { |
---|
983 | output << "case "; |
---|
984 | caseStmt->get_condition()->accept( *visitor ); |
---|
985 | } // if |
---|
986 | output << ":" << endl; |
---|
987 | |
---|
988 | std::list<Statement *> sts = caseStmt->get_statements(); |
---|
989 | |
---|
990 | ++indent; |
---|
991 | for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) { |
---|
992 | output << indent << printLabels( (*i)->get_labels() ) ; |
---|
993 | (*i)->accept( *visitor ); |
---|
994 | output << endl; |
---|
995 | } // for |
---|
996 | --indent; |
---|
997 | } |
---|
998 | |
---|
999 | void CodeGenerator::postvisit( BranchStmt * branchStmt ) { |
---|
1000 | switch ( branchStmt->get_type()) { |
---|
1001 | case BranchStmt::Goto: |
---|
1002 | if ( ! branchStmt->get_target().empty() ) |
---|
1003 | output << "goto " << branchStmt->get_target(); |
---|
1004 | else { |
---|
1005 | if ( branchStmt->get_computedTarget() != 0 ) { |
---|
1006 | output << "goto *"; |
---|
1007 | branchStmt->get_computedTarget()->accept( *visitor ); |
---|
1008 | } // if |
---|
1009 | } // if |
---|
1010 | break; |
---|
1011 | case BranchStmt::Break: |
---|
1012 | output << "break"; |
---|
1013 | break; |
---|
1014 | case BranchStmt::Continue: |
---|
1015 | output << "continue"; |
---|
1016 | break; |
---|
1017 | case BranchStmt::FallThrough: |
---|
1018 | case BranchStmt::FallThroughDefault: |
---|
1019 | assertf( ! options.genC, "fallthru should not reach code generation." ); |
---|
1020 | output << "fallthru"; |
---|
1021 | break; |
---|
1022 | } // switch |
---|
1023 | // print branch target for labelled break/continue/fallthru in debug mode |
---|
1024 | if ( ! options.genC && branchStmt->get_type() != BranchStmt::Goto ) { |
---|
1025 | if ( ! branchStmt->get_target().empty() ) { |
---|
1026 | output << " " << branchStmt->get_target(); |
---|
1027 | } else if ( branchStmt->get_type() == BranchStmt::FallThrough ) { |
---|
1028 | output << " default"; |
---|
1029 | } |
---|
1030 | } |
---|
1031 | output << ";"; |
---|
1032 | } |
---|
1033 | |
---|
1034 | void CodeGenerator::postvisit( ReturnStmt * returnStmt ) { |
---|
1035 | output << "return "; |
---|
1036 | maybeAccept( returnStmt->get_expr(), *visitor ); |
---|
1037 | output << ";"; |
---|
1038 | } |
---|
1039 | |
---|
1040 | void CodeGenerator::postvisit( ThrowStmt * throwStmt ) { |
---|
1041 | assertf( ! options.genC, "Throw statements should not reach code generation." ); |
---|
1042 | |
---|
1043 | output << ((throwStmt->get_kind() == ThrowStmt::Terminate) ? |
---|
1044 | "throw" : "throwResume"); |
---|
1045 | if (throwStmt->get_expr()) { |
---|
1046 | output << " "; |
---|
1047 | throwStmt->get_expr()->accept( *visitor ); |
---|
1048 | } |
---|
1049 | if (throwStmt->get_target()) { |
---|
1050 | output << " _At "; |
---|
1051 | throwStmt->get_target()->accept( *visitor ); |
---|
1052 | } |
---|
1053 | output << ";"; |
---|
1054 | } |
---|
1055 | void CodeGenerator::postvisit( CatchStmt * stmt ) { |
---|
1056 | assertf( ! options.genC, "Catch statements should not reach code generation." ); |
---|
1057 | |
---|
1058 | output << ((stmt->get_kind() == CatchStmt::Terminate) ? |
---|
1059 | "catch" : "catchResume"); |
---|
1060 | output << "( "; |
---|
1061 | stmt->decl->accept( *visitor ); |
---|
1062 | output << " ) "; |
---|
1063 | |
---|
1064 | if( stmt->cond ) { |
---|
1065 | output << "if/when(?) ("; |
---|
1066 | stmt->cond->accept( *visitor ); |
---|
1067 | output << ") "; |
---|
1068 | } |
---|
1069 | stmt->body->accept( *visitor ); |
---|
1070 | } |
---|
1071 | |
---|
1072 | void CodeGenerator::postvisit( WaitForStmt * stmt ) { |
---|
1073 | assertf( ! options.genC, "Waitfor statements should not reach code generation." ); |
---|
1074 | |
---|
1075 | bool first = true; |
---|
1076 | for( auto & clause : stmt->clauses ) { |
---|
1077 | if(first) { output << "or "; first = false; } |
---|
1078 | if( clause.condition ) { |
---|
1079 | output << "when("; |
---|
1080 | stmt->timeout.condition->accept( *visitor ); |
---|
1081 | output << ") "; |
---|
1082 | } |
---|
1083 | output << "waitfor("; |
---|
1084 | clause.target.function->accept( *visitor ); |
---|
1085 | for( Expression * expr : clause.target.arguments ) { |
---|
1086 | output << ","; |
---|
1087 | expr->accept( *visitor ); |
---|
1088 | } |
---|
1089 | output << ") "; |
---|
1090 | clause.statement->accept( *visitor ); |
---|
1091 | } |
---|
1092 | |
---|
1093 | if( stmt->timeout.statement ) { |
---|
1094 | output << "or "; |
---|
1095 | if( stmt->timeout.condition ) { |
---|
1096 | output << "when("; |
---|
1097 | stmt->timeout.condition->accept( *visitor ); |
---|
1098 | output << ") "; |
---|
1099 | } |
---|
1100 | output << "timeout("; |
---|
1101 | stmt->timeout.time->accept( *visitor ); |
---|
1102 | output << ") "; |
---|
1103 | stmt->timeout.statement->accept( *visitor ); |
---|
1104 | } |
---|
1105 | |
---|
1106 | if( stmt->orelse.statement ) { |
---|
1107 | output << "or "; |
---|
1108 | if( stmt->orelse.condition ) { |
---|
1109 | output << "when("; |
---|
1110 | stmt->orelse.condition->accept( *visitor ); |
---|
1111 | output << ")"; |
---|
1112 | } |
---|
1113 | output << "else "; |
---|
1114 | stmt->orelse.statement->accept( *visitor ); |
---|
1115 | } |
---|
1116 | } |
---|
1117 | |
---|
1118 | void CodeGenerator::postvisit( WithStmt * with ) { |
---|
1119 | if ( ! options.genC ) { |
---|
1120 | output << "with ( "; |
---|
1121 | genCommaList( with->exprs.begin(), with->exprs.end() ); |
---|
1122 | output << " ) "; |
---|
1123 | } |
---|
1124 | with->stmt->accept( *visitor ); |
---|
1125 | } |
---|
1126 | |
---|
1127 | void CodeGenerator::postvisit( WhileStmt * whileStmt ) { |
---|
1128 | if ( whileStmt->get_isDoWhile() ) { |
---|
1129 | output << "do"; |
---|
1130 | } else { |
---|
1131 | output << "while ("; |
---|
1132 | whileStmt->get_condition()->accept( *visitor ); |
---|
1133 | output << ")"; |
---|
1134 | } // if |
---|
1135 | output << " "; |
---|
1136 | |
---|
1137 | output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() ); |
---|
1138 | whileStmt->get_body()->accept( *visitor ); |
---|
1139 | |
---|
1140 | output << indent; |
---|
1141 | |
---|
1142 | if ( whileStmt->get_isDoWhile() ) { |
---|
1143 | output << " while ("; |
---|
1144 | whileStmt->get_condition()->accept( *visitor ); |
---|
1145 | output << ");"; |
---|
1146 | } // if |
---|
1147 | } |
---|
1148 | |
---|
1149 | void CodeGenerator::postvisit( ForStmt * forStmt ) { |
---|
1150 | // initialization is always hoisted, so don't bother doing anything with that |
---|
1151 | output << "for (;"; |
---|
1152 | |
---|
1153 | if ( forStmt->get_condition() != 0 ) { |
---|
1154 | forStmt->get_condition()->accept( *visitor ); |
---|
1155 | } // if |
---|
1156 | output << ";"; |
---|
1157 | |
---|
1158 | if ( forStmt->get_increment() != 0 ) { |
---|
1159 | // cast the top-level expression to void to reduce gcc warnings. |
---|
1160 | Expression * expr = new CastExpr( forStmt->get_increment() ); |
---|
1161 | expr->accept( *visitor ); |
---|
1162 | } // if |
---|
1163 | output << ") "; |
---|
1164 | |
---|
1165 | if ( forStmt->get_body() != 0 ) { |
---|
1166 | output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() ); |
---|
1167 | forStmt->get_body()->accept( *visitor ); |
---|
1168 | } // if |
---|
1169 | } |
---|
1170 | |
---|
1171 | void CodeGenerator::postvisit( __attribute__((unused)) NullStmt * nullStmt ) { |
---|
1172 | //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() ); |
---|
1173 | output << "/* null statement */ ;"; |
---|
1174 | } |
---|
1175 | |
---|
1176 | void CodeGenerator::postvisit( DeclStmt * declStmt ) { |
---|
1177 | declStmt->get_decl()->accept( *visitor ); |
---|
1178 | |
---|
1179 | if ( doSemicolon( declStmt->get_decl() ) ) { |
---|
1180 | output << ";"; |
---|
1181 | } // if |
---|
1182 | } |
---|
1183 | |
---|
1184 | void CodeGenerator::postvisit( ImplicitCtorDtorStmt * stmt ) { |
---|
1185 | assertf( ! options.genC, "ImplicitCtorDtorStmts should not reach code generation." ); |
---|
1186 | stmt->callStmt->accept( *visitor ); |
---|
1187 | } |
---|
1188 | |
---|
1189 | void CodeGenerator::handleStorageClass( DeclarationWithType * decl ) { |
---|
1190 | if ( decl->get_storageClasses().any() ) { |
---|
1191 | decl->get_storageClasses().print( output ); |
---|
1192 | } // if |
---|
1193 | } // CodeGenerator::handleStorageClass |
---|
1194 | |
---|
1195 | std::string genName( DeclarationWithType * decl ) { |
---|
1196 | const OperatorInfo * opInfo = operatorLookup( decl->get_name() ); |
---|
1197 | if ( opInfo ) { |
---|
1198 | return opInfo->outputName; |
---|
1199 | } else { |
---|
1200 | return decl->get_name(); |
---|
1201 | } // if |
---|
1202 | } |
---|
1203 | } // namespace CodeGen |
---|
1204 | |
---|
1205 | |
---|
1206 | unsigned Indenter::tabsize = 2; |
---|
1207 | |
---|
1208 | std::ostream & operator<<( std::ostream & out, const BaseSyntaxNode * node ) { |
---|
1209 | if ( node ) { |
---|
1210 | node->print( out ); |
---|
1211 | } else { |
---|
1212 | out << "nullptr"; |
---|
1213 | } |
---|
1214 | return out; |
---|
1215 | } |
---|
1216 | |
---|
1217 | // Local Variables: // |
---|
1218 | // tab-width: 4 // |
---|
1219 | // mode: c++ // |
---|
1220 | // compile-command: "make install" // |
---|
1221 | // End: // |
---|