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 | // CodeGenerator2.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 : Thu May 21 17:13:35 2015 |
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13 | // Update Count : 7 |
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14 | // |
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15 | |
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16 | #include <algorithm> |
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17 | #include <iostream> |
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18 | #include <cassert> |
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19 | #include <list> |
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20 | |
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21 | #include "SynTree/Type.h" |
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22 | #include "SynTree/Declaration.h" |
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23 | #include "SynTree/Statement.h" |
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24 | #include "SynTree/Expression.h" |
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25 | #include "SynTree/Initializer.h" |
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26 | |
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27 | #include "utility.h" |
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28 | #include "UnimplementedError.h" |
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29 | |
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30 | #include "CodeGenerator2.h" |
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31 | #include "OperatorTable.h" |
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32 | #include "GenType.h" |
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33 | |
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34 | using namespace std; |
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35 | |
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36 | namespace CodeGen { |
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37 | int CodeGenerator2::tabsize = 4; |
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38 | |
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39 | CodeGenerator2::CodeGenerator2( std::ostream &os ) : cur_indent( 0 ), insideFunction( false ), before( os ), after() { } |
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40 | |
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41 | CodeGenerator2::CodeGenerator2( std::ostream &os, std::string init, int indent, bool infunp ) |
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42 | : cur_indent( indent ), insideFunction( infunp ), before( os ) { |
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43 | //before << std::string( init ); |
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44 | } |
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45 | |
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46 | CodeGenerator2::CodeGenerator2( std::ostream &os, char *init, int indent, bool infunp ) |
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47 | : cur_indent( indent ), insideFunction( infunp ), before( os ) { |
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48 | //before << std::string( init ); |
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49 | } |
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50 | |
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51 | string mangleName( DeclarationWithType *decl ) { |
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52 | if ( decl->get_mangleName() != "" ) { |
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53 | return decl->get_mangleName(); |
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54 | } else { |
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55 | return decl->get_name(); |
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56 | } // if |
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57 | } |
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58 | |
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59 | //*** Declarations |
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60 | void CodeGenerator2::visit( FunctionDecl *functionDecl ) { |
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61 | handleStorageClass( functionDecl ); |
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62 | before << genType( functionDecl->get_functionType(), mangleName( functionDecl ) ); |
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63 | |
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64 | // how to get this to the Functype? |
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65 | std::list< Declaration * > olds = functionDecl->get_oldDecls(); |
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66 | if ( ! olds.empty() ) { |
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67 | before << " /* function has old declaration */"; |
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68 | } // if |
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69 | |
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70 | // acceptAll( functionDecl->get_oldDecls(), *this ); |
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71 | if ( functionDecl->get_statements() ) { |
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72 | functionDecl->get_statements()->accept(*this ); |
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73 | } // if |
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74 | } |
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75 | |
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76 | void CodeGenerator2::visit( ObjectDecl *objectDecl ) { |
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77 | handleStorageClass( objectDecl ); |
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78 | before << genType( objectDecl->get_type(), mangleName( objectDecl ) ); |
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79 | |
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80 | if ( objectDecl->get_init() ) { |
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81 | before << " = "; |
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82 | objectDecl->get_init()->accept( *this ); |
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83 | } // if |
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84 | if ( objectDecl->get_bitfieldWidth() ) { |
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85 | before << ":"; |
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86 | objectDecl->get_bitfieldWidth()->accept( *this ); |
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87 | } // if |
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88 | } |
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89 | |
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90 | void CodeGenerator2::handleAggregate( AggregateDecl *aggDecl ) { |
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91 | if ( aggDecl->get_name() != "" ) |
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92 | before << aggDecl->get_name(); |
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93 | |
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94 | std::list< Declaration * > &memb = aggDecl->get_members(); |
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95 | |
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96 | if ( ! memb.empty() ) { |
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97 | before << endl << string( cur_indent, ' ' ) << "{" << endl; |
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98 | |
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99 | cur_indent += CodeGenerator2::tabsize; |
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100 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) { |
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101 | before << string( cur_indent, ' ' ); |
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102 | (*i)->accept(*this ); |
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103 | before << ";" << endl; |
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104 | } |
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105 | |
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106 | cur_indent -= CodeGenerator2::tabsize; |
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107 | |
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108 | before << string( cur_indent, ' ' ) << "}"; |
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109 | } // if |
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110 | } |
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111 | |
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112 | void CodeGenerator2::visit( StructDecl *structDecl ) { |
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113 | before << "struct "; |
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114 | handleAggregate( structDecl ); |
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115 | } |
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116 | |
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117 | void CodeGenerator2::visit( UnionDecl *aggregateDecl ) { |
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118 | before << "union "; |
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119 | handleAggregate( aggregateDecl ); |
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120 | } |
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121 | |
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122 | void CodeGenerator2::visit( EnumDecl *aggDecl ) { |
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123 | before << "enum "; |
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124 | |
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125 | if ( aggDecl->get_name() != "" ) |
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126 | before << aggDecl->get_name(); |
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127 | |
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128 | std::list< Declaration* > &memb = aggDecl->get_members(); |
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129 | |
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130 | if ( ! memb.empty() ) { |
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131 | before << endl << "{" << endl; |
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132 | |
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133 | cur_indent += CodeGenerator2::tabsize; |
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134 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) { |
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135 | ObjectDecl *obj = dynamic_cast< ObjectDecl* >( *i ); |
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136 | assert( obj ); |
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137 | before << string( cur_indent, ' ' ) << mangleName( obj ); |
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138 | if ( obj->get_init() ) { |
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139 | before << " = "; |
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140 | obj->get_init()->accept(*this ); |
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141 | } // if |
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142 | before << "," << endl; |
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143 | } // for |
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144 | |
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145 | cur_indent -= CodeGenerator2::tabsize; |
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146 | |
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147 | before << "}" << endl; |
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148 | } // if |
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149 | } |
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150 | |
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151 | void CodeGenerator2::visit( ContextDecl *aggregateDecl ) {} |
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152 | |
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153 | void CodeGenerator2::visit( TypedefDecl *typeDecl ) { |
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154 | before << "typedef "; |
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155 | before << genType( typeDecl->get_base(), typeDecl->get_name() ); |
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156 | } |
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157 | |
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158 | void CodeGenerator2::visit( TypeDecl *typeDecl ) { |
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159 | // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes, |
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160 | // still to be done |
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161 | before << "extern unsigned long " << typeDecl->get_name(); |
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162 | if ( typeDecl->get_base() ) { |
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163 | before << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )"; |
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164 | } // if |
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165 | } |
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166 | |
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167 | void CodeGenerator2::visit( SingleInit *init ) { |
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168 | init->get_value()->accept( *this ); |
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169 | } |
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170 | |
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171 | void CodeGenerator2::visit( ListInit *init ) { |
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172 | before << "{ "; |
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173 | genCommaList( init->begin_initializers(), init->end_initializers() ); |
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174 | before << " }"; |
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175 | } |
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176 | |
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177 | void CodeGenerator2::visit( Constant *constant ) { |
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178 | before << constant->get_value() ; |
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179 | } |
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180 | |
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181 | //*** Expressions |
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182 | void CodeGenerator2::visit( ApplicationExpr *applicationExpr ) { |
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183 | if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) { |
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184 | OperatorInfo opInfo; |
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185 | if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) { |
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186 | std::list< Expression* >::iterator arg = applicationExpr->get_args().begin(); |
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187 | switch ( opInfo.type ) { |
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188 | case OT_PREFIXASSIGN: |
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189 | case OT_POSTFIXASSIGN: |
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190 | case OT_INFIXASSIGN: |
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191 | { |
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192 | assert( arg != applicationExpr->get_args().end() ); |
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193 | if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) { |
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194 | |
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195 | *arg = addrExpr->get_arg(); |
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196 | } else { |
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197 | UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) ); |
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198 | newExpr->get_args().push_back( *arg ); |
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199 | *arg = newExpr; |
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200 | } // if |
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201 | break; |
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202 | } |
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203 | |
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204 | default: |
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205 | // do nothing |
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206 | ; |
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207 | } |
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208 | |
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209 | switch ( opInfo.type ) { |
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210 | case OT_INDEX: |
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211 | assert( applicationExpr->get_args().size() == 2 ); |
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212 | (*arg++)->accept( *this ); |
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213 | before << "["; |
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214 | (*arg)->accept( *this ); |
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215 | before << "]"; |
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216 | break; |
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217 | |
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218 | case OT_CALL: |
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219 | // there are no intrinsic definitions of the function call operator |
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220 | assert( false ); |
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221 | break; |
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222 | |
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223 | case OT_PREFIX: |
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224 | case OT_PREFIXASSIGN: |
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225 | assert( applicationExpr->get_args().size() == 1 ); |
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226 | before << "("; |
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227 | before << opInfo.symbol; |
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228 | (*arg)->accept( *this ); |
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229 | before << ")"; |
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230 | break; |
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231 | |
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232 | case OT_POSTFIX: |
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233 | case OT_POSTFIXASSIGN: |
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234 | assert( applicationExpr->get_args().size() == 1 ); |
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235 | (*arg)->accept( *this ); |
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236 | before << opInfo.symbol; |
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237 | break; |
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238 | |
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239 | case OT_INFIX: |
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240 | case OT_INFIXASSIGN: |
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241 | assert( applicationExpr->get_args().size() == 2 ); |
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242 | before << "("; |
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243 | (*arg++)->accept( *this ); |
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244 | before << opInfo.symbol; |
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245 | (*arg)->accept( *this ); |
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246 | before << ")"; |
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247 | break; |
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248 | |
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249 | case OT_CONSTANT: |
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250 | // there are no intrinsic definitions of 0 or 1 as functions |
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251 | assert( false ); |
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252 | } |
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253 | } else { |
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254 | varExpr->accept( *this ); |
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255 | before << "("; |
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256 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
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257 | before << ")"; |
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258 | } // if |
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259 | } else { |
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260 | applicationExpr->get_function()->accept( *this ); |
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261 | before << "("; |
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262 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
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263 | before << ")"; |
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264 | } // if |
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265 | } |
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266 | |
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267 | void CodeGenerator2::visit( UntypedExpr *untypedExpr ) { |
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268 | if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) { |
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269 | OperatorInfo opInfo; |
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270 | if ( operatorLookup( nameExpr->get_name(), opInfo ) ) { |
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271 | std::list< Expression* >::iterator arg = untypedExpr->get_args().begin(); |
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272 | switch ( opInfo.type ) { |
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273 | case OT_INDEX: |
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274 | assert( untypedExpr->get_args().size() == 2 ); |
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275 | (*arg++)->accept( *this ); |
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276 | before << "["; |
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277 | (*arg)->accept( *this ); |
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278 | before << "]"; |
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279 | break; |
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280 | |
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281 | case OT_CALL: |
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282 | assert( false ); |
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283 | break; |
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284 | |
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285 | case OT_PREFIX: |
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286 | case OT_PREFIXASSIGN: |
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287 | assert( untypedExpr->get_args().size() == 1 ); |
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288 | before << "("; |
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289 | before << opInfo.symbol; |
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290 | (*arg)->accept( *this ); |
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291 | before << ")"; |
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292 | break; |
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293 | |
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294 | case OT_POSTFIX: |
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295 | case OT_POSTFIXASSIGN: |
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296 | assert( untypedExpr->get_args().size() == 1 ); |
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297 | (*arg)->accept( *this ); |
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298 | before << opInfo.symbol; |
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299 | break; |
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300 | |
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301 | case OT_INFIX: |
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302 | case OT_INFIXASSIGN: |
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303 | assert( untypedExpr->get_args().size() == 2 ); |
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304 | before << "("; |
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305 | (*arg++)->accept( *this ); |
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306 | before << opInfo.symbol; |
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307 | (*arg)->accept( *this ); |
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308 | before << ")"; |
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309 | break; |
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310 | |
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311 | case OT_CONSTANT: |
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312 | // there are no intrinsic definitions of 0 or 1 as functions |
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313 | assert( false ); |
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314 | } |
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315 | } else { |
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316 | nameExpr->accept( *this ); |
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317 | before << "("; |
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318 | genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() ); |
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319 | before << ")"; |
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320 | } // if |
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321 | } else { |
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322 | untypedExpr->get_function()->accept( *this ); |
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323 | before << "("; |
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324 | genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() ); |
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325 | before << ")"; |
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326 | } // if |
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327 | } |
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328 | |
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329 | void CodeGenerator2::visit( NameExpr *nameExpr ) { |
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330 | OperatorInfo opInfo; |
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331 | if ( operatorLookup( nameExpr->get_name(), opInfo ) ) { |
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332 | assert( opInfo.type == OT_CONSTANT ); |
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333 | before << opInfo.symbol; |
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334 | } else { |
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335 | before << nameExpr->get_name(); |
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336 | } // if |
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337 | } |
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338 | |
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339 | void CodeGenerator2::visit( AddressExpr *addressExpr ) { |
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340 | before << "(&"; |
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341 | // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address |
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342 | if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) { |
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343 | before << mangleName( variableExpr->get_var() ); |
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344 | } else { |
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345 | addressExpr->get_arg()->accept( *this ); |
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346 | } // if |
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347 | before << ")"; |
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348 | } |
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349 | |
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350 | void CodeGenerator2::visit( CastExpr *castExpr ) { |
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351 | before << "(("; |
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352 | if ( castExpr->get_results().empty() ) { |
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353 | before << "void" ; |
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354 | } else { |
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355 | before << genType( castExpr->get_results().front(), "" ); |
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356 | } // if |
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357 | before << ")"; |
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358 | castExpr->get_arg()->accept( *this ); |
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359 | before << ")"; |
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360 | } |
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361 | |
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362 | void CodeGenerator2::visit( UntypedMemberExpr *memberExpr ) { |
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363 | assert( false ); |
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364 | } |
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365 | |
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366 | void CodeGenerator2::visit( MemberExpr *memberExpr ) { |
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367 | memberExpr->get_aggregate()->accept( *this ); |
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368 | before << "." << mangleName( memberExpr->get_member() ); |
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369 | } |
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370 | |
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371 | void CodeGenerator2::visit( VariableExpr *variableExpr ) { |
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372 | OperatorInfo opInfo; |
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373 | if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) { |
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374 | before << opInfo.symbol; |
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375 | } else { |
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376 | before << mangleName( variableExpr->get_var() ); |
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377 | } // if |
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378 | } |
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379 | |
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380 | void CodeGenerator2::visit( ConstantExpr *constantExpr ) { |
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381 | assert( constantExpr->get_constant() ); |
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382 | constantExpr->get_constant()->accept( *this ); |
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383 | } |
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384 | |
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385 | void CodeGenerator2::visit( SizeofExpr *sizeofExpr ) { |
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386 | before << "sizeof("; |
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387 | if ( sizeofExpr->get_isType() ) { |
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388 | before << genType( sizeofExpr->get_type(), "" ); |
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389 | } else { |
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390 | sizeofExpr->get_expr()->accept( *this ); |
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391 | } // if |
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392 | before << ")"; |
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393 | } |
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394 | |
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395 | void CodeGenerator2::visit( LogicalExpr *logicalExpr ) { |
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396 | before << "("; |
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397 | logicalExpr->get_arg1()->accept( *this ); |
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398 | if ( logicalExpr->get_isAnd() ) { |
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399 | before << " && "; |
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400 | } else { |
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401 | before << " || "; |
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402 | } // if |
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403 | logicalExpr->get_arg2()->accept( *this ); |
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404 | before << ")"; |
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405 | } |
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406 | |
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407 | void CodeGenerator2::visit( ConditionalExpr *conditionalExpr ) { |
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408 | before << "("; |
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409 | conditionalExpr->get_arg1()->accept( *this ); |
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410 | before << " ? "; |
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411 | conditionalExpr->get_arg2()->accept( *this ); |
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412 | before << " : "; |
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413 | conditionalExpr->get_arg3()->accept( *this ); |
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414 | before << ")"; |
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415 | } |
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416 | |
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417 | void CodeGenerator2::visit( CommaExpr *commaExpr ) { |
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418 | before << "("; |
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419 | commaExpr->get_arg1()->accept( *this ); |
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420 | before << " , "; |
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421 | commaExpr->get_arg2()->accept( *this ); |
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422 | before << ")"; |
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423 | } |
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424 | |
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425 | void CodeGenerator2::visit( TupleExpr *tupleExpr ) {} |
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426 | |
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427 | void CodeGenerator2::visit( TypeExpr *typeExpr ) {} |
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428 | |
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429 | |
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430 | //*** Statements |
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431 | void CodeGenerator2::visit( CompoundStmt *compoundStmt ) { |
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432 | std::list<Statement*> ks = compoundStmt->get_kids(); |
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433 | |
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434 | before << endl << string( cur_indent, ' ' ) << "{" << endl; |
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435 | |
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436 | cur_indent += CodeGenerator2::tabsize; |
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437 | |
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438 | for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++) { |
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439 | before << string( cur_indent, ' ' ) << printLabels( (*i)->get_labels() ) ; |
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440 | (*i)->accept(*this ); |
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441 | shift_left(); |
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442 | before << endl; |
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443 | } |
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444 | cur_indent -= CodeGenerator2::tabsize; |
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445 | |
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446 | before << string( cur_indent, ' ' ) << "}" << endl; |
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447 | } |
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448 | |
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449 | void CodeGenerator2::visit( ExprStmt *exprStmt ) { |
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450 | if ( exprStmt != 0 ) { |
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451 | exprStmt->get_expr()->accept( *this ); |
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452 | shift_left(); |
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453 | before << ";" ; |
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454 | } // if |
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455 | } |
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456 | |
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457 | void CodeGenerator2::visit( IfStmt *ifStmt ) { |
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458 | before << "if ("; |
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459 | ifStmt->get_condition()->accept(*this ); |
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460 | after += ")\n"; |
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461 | shift_left(); |
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462 | |
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463 | cur_indent += CodeGenerator2::tabsize; |
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464 | before << string( cur_indent, ' ' ); |
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465 | ifStmt->get_thenPart()->accept(*this ); |
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466 | cur_indent -= CodeGenerator2::tabsize; |
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467 | shift_left(); before << endl; |
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468 | |
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469 | if ( ifStmt->get_elsePart() != 0) { |
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470 | before << string( cur_indent, ' ' ) << " else " << endl ; |
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471 | |
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472 | cur_indent += CodeGenerator2::tabsize; |
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473 | ifStmt->get_elsePart()->accept(*this ); |
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474 | cur_indent -= CodeGenerator2::tabsize; |
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475 | } // if |
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476 | } |
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477 | |
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478 | void CodeGenerator2::visit( SwitchStmt *switchStmt ) { |
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479 | //before << /* "\r" << */ string( cur_indent, ' ' ) << CodeGenerator2::printLabels( switchStmt->get_labels() ) |
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480 | before << "switch (" ; |
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481 | switchStmt->get_condition()->accept(*this ); |
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482 | after += ")\n"; |
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483 | shift_left(); |
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484 | |
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485 | before << string( cur_indent, ' ' ) << "{" << std::endl; |
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486 | cur_indent += CodeGenerator2::tabsize; |
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487 | |
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488 | std::list< Statement * > stmts = switchStmt->get_branches(); |
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489 | bool lastBreak = false; |
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490 | |
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491 | // horrible, horrible hack |
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492 | if ( dynamic_cast<BranchStmt *>( stmts.back() ) != 0 ) { |
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493 | lastBreak = true; |
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494 | stmts.pop_back(); |
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495 | } // if |
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496 | acceptAll( stmts, *this ); |
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497 | if ( lastBreak ) { |
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498 | Statement *st = switchStmt->get_branches().back(); |
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499 | before << CodeGenerator2::printLabels( st->get_labels()); |
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500 | st->accept( *this ); |
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501 | } // if |
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502 | |
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503 | cur_indent -= CodeGenerator2::tabsize; |
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504 | |
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505 | before << /* "\r" << */ string( cur_indent, ' ' ) << "}" << endl ; |
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506 | } |
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507 | |
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508 | void CodeGenerator2::visit( CaseStmt *caseStmt ) { |
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509 | before << string( cur_indent, ' ' ); |
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510 | if ( caseStmt->isDefault()) |
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511 | before << "default " ; |
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512 | else { |
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513 | before << "case " ; |
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514 | caseStmt->get_condition()->accept(*this ); |
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515 | } // if |
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516 | after += ":\n"; |
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517 | shift_left(); |
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518 | |
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519 | std::list<Statement *> sts = caseStmt->get_statements(); |
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520 | |
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521 | cur_indent += CodeGenerator2::tabsize; |
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522 | for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) { |
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523 | before << /* "\r" << */ string( cur_indent, ' ' ) << printLabels( (*i)->get_labels() ) ; |
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524 | (*i)->accept(*this ); |
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525 | shift_left(); |
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526 | before << ";" << endl; |
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527 | } |
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528 | cur_indent -= CodeGenerator2::tabsize; |
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529 | } |
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530 | |
---|
531 | void CodeGenerator2::visit( BranchStmt *branchStmt ) { |
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532 | switch ( branchStmt->get_type()) { |
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533 | case BranchStmt::Goto: |
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534 | if ( ! branchStmt->get_target().empty() ) |
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535 | before << "goto " << branchStmt->get_target(); |
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536 | else { |
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537 | if ( branchStmt->get_computedTarget() != 0 ) { |
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538 | before << "goto *"; |
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539 | branchStmt->get_computedTarget()->accept( *this ); |
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540 | } // if |
---|
541 | } // if |
---|
542 | break; |
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543 | case BranchStmt::Break: |
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544 | before << "break"; |
---|
545 | break; |
---|
546 | case BranchStmt::Continue: |
---|
547 | before << "continue"; |
---|
548 | break; |
---|
549 | } |
---|
550 | before << ";"; |
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551 | } |
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552 | |
---|
553 | |
---|
554 | void CodeGenerator2::visit( ReturnStmt *returnStmt ) { |
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555 | before << "return "; |
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556 | |
---|
557 | // xxx -- check for null expression; |
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558 | if ( returnStmt->get_expr() ) { |
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559 | returnStmt->get_expr()->accept( *this ); |
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560 | } // if |
---|
561 | after += ";"; |
---|
562 | } |
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563 | |
---|
564 | void CodeGenerator2::visit( WhileStmt *whileStmt ) { |
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565 | if ( whileStmt->get_isDoWhile() ) |
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566 | before << "do" ; |
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567 | else { |
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568 | before << "while (" ; |
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569 | whileStmt->get_condition()->accept(*this ); |
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570 | after += ")"; |
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571 | } // if |
---|
572 | after += "{\n"; |
---|
573 | shift_left(); |
---|
574 | |
---|
575 | whileStmt->get_body()->accept( *this ); |
---|
576 | |
---|
577 | before << /* "\r" << */ string( cur_indent, ' ' ) << "}" ; |
---|
578 | |
---|
579 | if ( whileStmt->get_isDoWhile() ) { |
---|
580 | before << " while (" ; |
---|
581 | whileStmt->get_condition()->accept(*this ); |
---|
582 | after += ");"; |
---|
583 | } // if |
---|
584 | |
---|
585 | after += "\n"; |
---|
586 | } |
---|
587 | |
---|
588 | void CodeGenerator2::visit( ForStmt *forStmt ) { |
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589 | before << "for ("; |
---|
590 | |
---|
591 | if ( forStmt->get_initialization() != 0 ) |
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592 | forStmt->get_initialization()->accept( *this ); |
---|
593 | else |
---|
594 | before << ";"; |
---|
595 | shift_left(); |
---|
596 | |
---|
597 | if ( forStmt->get_condition() != 0 ) |
---|
598 | forStmt->get_condition()->accept( *this ); |
---|
599 | shift_left(); before << ";"; |
---|
600 | |
---|
601 | if ( forStmt->get_increment() != 0 ) |
---|
602 | forStmt->get_increment()->accept( *this ); |
---|
603 | shift_left(); before << ")" << endl; |
---|
604 | |
---|
605 | if ( forStmt->get_body() != 0 ) { |
---|
606 | cur_indent += CodeGenerator2::tabsize; |
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607 | before << string( cur_indent, ' ' ) << CodeGenerator2::printLabels( forStmt->get_body()->get_labels() ); |
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608 | forStmt->get_body()->accept( *this ); |
---|
609 | cur_indent -= CodeGenerator2::tabsize; |
---|
610 | } // if |
---|
611 | } |
---|
612 | |
---|
613 | void CodeGenerator2::visit( NullStmt *nullStmt ) { |
---|
614 | //before << /* "\r" << */ string( cur_indent, ' ' ) << CodeGenerator2::printLabels( nullStmt->get_labels() ); |
---|
615 | before << "/* null statement */ ;"; |
---|
616 | } |
---|
617 | |
---|
618 | void CodeGenerator2::visit( DeclStmt *declStmt ) { |
---|
619 | declStmt->get_decl()->accept( *this ); |
---|
620 | |
---|
621 | if ( doSemicolon( declStmt->get_decl() ) ) { |
---|
622 | after += ";"; |
---|
623 | } // if |
---|
624 | shift_left(); |
---|
625 | } |
---|
626 | |
---|
627 | std::string CodeGenerator2::printLabels( std::list< Label > &l ) { |
---|
628 | std::string str( "" ); |
---|
629 | l.unique(); |
---|
630 | |
---|
631 | for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ ) |
---|
632 | str += *i + ": "; |
---|
633 | |
---|
634 | return str; |
---|
635 | } |
---|
636 | |
---|
637 | void CodeGenerator2::shift_left() { |
---|
638 | before << after; |
---|
639 | after = ""; |
---|
640 | } |
---|
641 | |
---|
642 | void CodeGenerator2::handleStorageClass( Declaration *decl ) { |
---|
643 | switch ( decl->get_storageClass() ) { |
---|
644 | case Declaration::NoStorageClass: |
---|
645 | break; |
---|
646 | case Declaration::Extern: |
---|
647 | before << "extern "; |
---|
648 | break; |
---|
649 | case Declaration::Static: |
---|
650 | before << "static "; |
---|
651 | break; |
---|
652 | case Declaration::Auto: |
---|
653 | // silently drop storage class |
---|
654 | break; |
---|
655 | case Declaration::Register: |
---|
656 | before << "register "; |
---|
657 | break; |
---|
658 | } // switch |
---|
659 | } |
---|
660 | } // namespace CodeGen |
---|
661 | |
---|
662 | // Local Variables: // |
---|
663 | // tab-width: 4 // |
---|
664 | // mode: c++ // |
---|
665 | // compile-command: "make install" // |
---|
666 | // End: // |
---|