[51587aa] | 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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[71f4e4f] | 7 | // CodeGenerator.cc -- |
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[51587aa] | 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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[8688ce1] | 11 | // Last Modified By : Peter A. Buhr |
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[58dd019] | 12 | // Last Modified On : Tue Dec 13 14:51:27 2016 |
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| 13 | // Update Count : 362 |
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[51587aa] | 14 | // |
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| 15 | |
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[51b7345] | 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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[68cd1ce] | 21 | #include "Parser/ParseNode.h" |
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| 22 | |
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[e8032b0] | 23 | #include "SynTree/Declaration.h" |
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[51b7345] | 24 | #include "SynTree/Expression.h" |
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| 25 | #include "SynTree/Initializer.h" |
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[68cd1ce] | 26 | #include "SynTree/Statement.h" |
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[e8032b0] | 27 | #include "SynTree/Type.h" |
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[7baed7d] | 28 | #include "SynTree/Attribute.h" |
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[51b7345] | 29 | |
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[d3b7937] | 30 | #include "Common/utility.h" |
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| 31 | #include "Common/UnimplementedError.h" |
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[51b7345] | 32 | |
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[a61fea9a] | 33 | #include "CodeGenerator.h" |
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[51b7345] | 34 | #include "OperatorTable.h" |
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| 35 | #include "GenType.h" |
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| 36 | |
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[10a7775] | 37 | #include "InitTweak/InitTweak.h" |
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| 38 | |
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[51b7345] | 39 | using namespace std; |
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| 40 | |
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| 41 | namespace CodeGen { |
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[6c4ff37] | 42 | int CodeGenerator::tabsize = 4; |
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[51587aa] | 43 | |
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[145f1fc] | 44 | // the kinds of statements that would ideally be followed by whitespace |
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[2b6c1e0] | 45 | bool wantSpacing( Statement * stmt) { |
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| 46 | return dynamic_cast< IfStmt * >( stmt ) || dynamic_cast< CompoundStmt * >( stmt ) || |
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[08061589] | 47 | dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * >( stmt ) || dynamic_cast< SwitchStmt *>( stmt ); |
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[2b6c1e0] | 48 | } |
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| 49 | |
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[8688ce1] | 50 | void CodeGenerator::extension( Expression * expr ) { |
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[8e9cbb2] | 51 | if ( expr->get_extension() ) { |
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| 52 | output << "__extension__ "; |
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| 53 | } // if |
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| 54 | } // extension |
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| 55 | |
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[8688ce1] | 56 | void CodeGenerator::extension( Declaration * decl ) { |
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[8e9cbb2] | 57 | if ( decl->get_extension() ) { |
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| 58 | output << "__extension__ "; |
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| 59 | } // if |
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| 60 | } // extension |
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| 61 | |
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[58dd019] | 62 | void CodeGenerator::asmName( DeclarationWithType * decl ) { |
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| 63 | if ( ConstantExpr * asmName = decl->get_asmName() ) { |
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| 64 | output << " asm ( " << asmName->get_constant()->get_value() << " )"; |
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| 65 | } // if |
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| 66 | } // extension |
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| 67 | |
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[888cbe4] | 68 | ostream & CodeGenerator::Indenter::operator()( ostream & output ) const { |
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[cda48b6] | 69 | return output << string( cg.cur_indent, ' ' ); |
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| 70 | } |
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| 71 | |
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[888cbe4] | 72 | ostream & operator<<( ostream & output, const CodeGenerator::Indenter &indent ) { |
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[cda48b6] | 73 | return indent( output ); |
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| 74 | } |
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[51587aa] | 75 | |
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[888cbe4] | 76 | CodeGenerator::LabelPrinter & CodeGenerator::LabelPrinter::operator()( std::list< Label > & l ) { |
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| 77 | labels = &l; |
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| 78 | return *this; |
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| 79 | } |
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| 80 | |
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[8688ce1] | 81 | ostream & operator<<( ostream & output, CodeGenerator::LabelPrinter & printLabels ) { |
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[888cbe4] | 82 | std::list< Label > & labs = *printLabels.labels; |
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| 83 | // l.unique(); // assumes a sorted list. Why not use set? Does order matter? |
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| 84 | for ( Label & l : labs ) { |
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| 85 | output << l.get_name() + ": "; |
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| 86 | printLabels.cg.genAttributes( l.get_attributes() ); |
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[8688ce1] | 87 | } // for |
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[888cbe4] | 88 | return output; |
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| 89 | } |
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| 90 | |
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[486341f] | 91 | CodeGenerator::CodeGenerator( std::ostream & os, bool mangle ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ), printLabels( *this ), mangle( mangle ) {} |
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[cda48b6] | 92 | |
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[8688ce1] | 93 | CodeGenerator::CodeGenerator( std::ostream & os, std::string init, int indentation, bool infunp ) |
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[888cbe4] | 94 | : indent( *this), cur_indent( indentation ), insideFunction( infunp ), output( os ), printLabels( *this ) { |
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[6c4ff37] | 95 | //output << std::string( init ); |
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[51587aa] | 96 | } |
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| 97 | |
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[8688ce1] | 98 | CodeGenerator::CodeGenerator( std::ostream & os, char * init, int indentation, bool infunp ) |
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[888cbe4] | 99 | : indent( *this ), cur_indent( indentation ), insideFunction( infunp ), output( os ), printLabels( *this ) { |
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[6c4ff37] | 100 | //output << std::string( init ); |
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[51587aa] | 101 | } |
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| 102 | |
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[486341f] | 103 | string CodeGenerator::mangleName( DeclarationWithType * decl ) { |
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| 104 | if ( ! mangle ) return decl->get_name(); |
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[51587aa] | 105 | if ( decl->get_mangleName() != "" ) { |
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[f326f99] | 106 | // need to incorporate scope level in order to differentiate names for destructors |
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| 107 | return decl->get_scopedMangleName(); |
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[51587aa] | 108 | } else { |
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| 109 | return decl->get_name(); |
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| 110 | } // if |
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| 111 | } |
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[94b4364] | 112 | |
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[7baed7d] | 113 | void CodeGenerator::genAttributes( std::list< Attribute * > & attributes ) { |
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| 114 | if ( ! attributes.empty() ) { |
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| 115 | output << "__attribute__ (("; |
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| 116 | for ( Attribute *& attr : attributes ) { |
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| 117 | if ( ! attr->empty() ) { |
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| 118 | output << attr->get_name() << "("; |
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| 119 | genCommaList( attr->get_parameters().begin(), attr->get_parameters().end() ); |
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| 120 | output << ")"; |
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[8688ce1] | 121 | } // if |
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[7baed7d] | 122 | output << ","; |
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[8688ce1] | 123 | } // for |
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[7baed7d] | 124 | output << ")) "; |
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[8688ce1] | 125 | } // if |
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[7baed7d] | 126 | } |
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| 127 | |
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| 128 | |
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| 129 | //*** Declarations |
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[8688ce1] | 130 | void CodeGenerator::visit( FunctionDecl * functionDecl ) { |
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[8e9cbb2] | 131 | extension( functionDecl ); |
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[7baed7d] | 132 | genAttributes( functionDecl->get_attributes() ); |
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| 133 | |
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[51587aa] | 134 | handleStorageClass( functionDecl ); |
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[f38c8d9] | 135 | if ( functionDecl->get_isInline() ) { |
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[6c4ff37] | 136 | output << "inline "; |
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[f38c8d9] | 137 | } // if |
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[de62360d] | 138 | if ( functionDecl->get_isNoreturn() ) { |
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| 139 | output << "_Noreturn "; |
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| 140 | } // if |
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[6c4ff37] | 141 | output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) ); |
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[51587aa] | 142 | |
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| 143 | // how to get this to the Functype? |
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| 144 | std::list< Declaration * > olds = functionDecl->get_oldDecls(); |
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| 145 | if ( ! olds.empty() ) { |
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[6c4ff37] | 146 | output << " /* function has old declaration */"; |
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[51587aa] | 147 | } // if |
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| 148 | |
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[58dd019] | 149 | asmName( functionDecl ); |
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| 150 | |
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[51587aa] | 151 | // acceptAll( functionDecl->get_oldDecls(), *this ); |
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| 152 | if ( functionDecl->get_statements() ) { |
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[7f5566b] | 153 | functionDecl->get_statements()->accept( *this ); |
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[51587aa] | 154 | } // if |
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| 155 | } |
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| 156 | |
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[8688ce1] | 157 | void CodeGenerator::visit( ObjectDecl * objectDecl ) { |
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[8e9cbb2] | 158 | extension( objectDecl ); |
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[f9cebb5] | 159 | genAttributes( objectDecl->get_attributes() ); |
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| 160 | |
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[51587aa] | 161 | handleStorageClass( objectDecl ); |
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[6c4ff37] | 162 | output << genType( objectDecl->get_type(), mangleName( objectDecl ) ); |
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[71f4e4f] | 163 | |
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[58dd019] | 164 | asmName( objectDecl ); |
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| 165 | |
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[51587aa] | 166 | if ( objectDecl->get_init() ) { |
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[6c4ff37] | 167 | output << " = "; |
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[51587aa] | 168 | objectDecl->get_init()->accept( *this ); |
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| 169 | } // if |
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[3778cb2] | 170 | |
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[51587aa] | 171 | if ( objectDecl->get_bitfieldWidth() ) { |
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[6c4ff37] | 172 | output << ":"; |
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[51587aa] | 173 | objectDecl->get_bitfieldWidth()->accept( *this ); |
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| 174 | } // if |
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| 175 | } |
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| 176 | |
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[8688ce1] | 177 | void CodeGenerator::handleAggregate( AggregateDecl * aggDecl ) { |
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[51587aa] | 178 | if ( aggDecl->get_name() != "" ) |
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[6c4ff37] | 179 | output << aggDecl->get_name(); |
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[71f4e4f] | 180 | |
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[2c57025] | 181 | // std::list< Declaration * > & memb = aggDecl->get_members(); |
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| 182 | // if ( ! memb.empty() ) { |
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| 183 | if ( aggDecl->has_body() ) { |
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| 184 | std::list< Declaration * > & memb = aggDecl->get_members(); |
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[94b4364] | 185 | output << " {" << endl; |
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[51587aa] | 186 | |
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[71f4e4f] | 187 | cur_indent += CodeGenerator::tabsize; |
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[3778cb2] | 188 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) { |
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[71f4e4f] | 189 | output << indent; |
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[7f5566b] | 190 | (*i)->accept( *this ); |
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[6c4ff37] | 191 | output << ";" << endl; |
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[3778cb2] | 192 | } // for |
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[51587aa] | 193 | |
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[71f4e4f] | 194 | cur_indent -= CodeGenerator::tabsize; |
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[51587aa] | 195 | |
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[cda48b6] | 196 | output << indent << "}"; |
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[17cd4eb] | 197 | } // if |
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[51587aa] | 198 | } |
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[17cd4eb] | 199 | |
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[8688ce1] | 200 | void CodeGenerator::visit( StructDecl * structDecl ) { |
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[8e9cbb2] | 201 | extension( structDecl ); |
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[6c4ff37] | 202 | output << "struct "; |
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[51587aa] | 203 | handleAggregate( structDecl ); |
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| 204 | } |
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[17cd4eb] | 205 | |
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[8688ce1] | 206 | void CodeGenerator::visit( UnionDecl * unionDecl ) { |
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[8e9cbb2] | 207 | extension( unionDecl ); |
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[6c4ff37] | 208 | output << "union "; |
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[8e9cbb2] | 209 | handleAggregate( unionDecl ); |
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[51587aa] | 210 | } |
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[71f4e4f] | 211 | |
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[8688ce1] | 212 | void CodeGenerator::visit( EnumDecl * enumDecl ) { |
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[8e9cbb2] | 213 | extension( enumDecl ); |
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[6c4ff37] | 214 | output << "enum "; |
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[51587aa] | 215 | |
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[8e9cbb2] | 216 | if ( enumDecl->get_name() != "" ) |
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| 217 | output << enumDecl->get_name(); |
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[71f4e4f] | 218 | |
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[8e9cbb2] | 219 | std::list< Declaration* > &memb = enumDecl->get_members(); |
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[51587aa] | 220 | |
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| 221 | if ( ! memb.empty() ) { |
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[cda48b6] | 222 | output << " {" << endl; |
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[51587aa] | 223 | |
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[71f4e4f] | 224 | cur_indent += CodeGenerator::tabsize; |
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[51587aa] | 225 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) { |
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[8688ce1] | 226 | ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i ); |
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[51587aa] | 227 | assert( obj ); |
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[71f4e4f] | 228 | output << indent << mangleName( obj ); |
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[51587aa] | 229 | if ( obj->get_init() ) { |
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[6c4ff37] | 230 | output << " = "; |
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[7f5566b] | 231 | obj->get_init()->accept( *this ); |
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[51587aa] | 232 | } // if |
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[6c4ff37] | 233 | output << "," << endl; |
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[51587aa] | 234 | } // for |
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| 235 | |
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[71f4e4f] | 236 | cur_indent -= CodeGenerator::tabsize; |
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[51587aa] | 237 | |
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[cda48b6] | 238 | output << indent << "}"; |
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[51587aa] | 239 | } // if |
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| 240 | } |
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[71f4e4f] | 241 | |
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[8688ce1] | 242 | void CodeGenerator::visit( TraitDecl * traitDecl ) {} |
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[71f4e4f] | 243 | |
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[8688ce1] | 244 | void CodeGenerator::visit( TypedefDecl * typeDecl ) { |
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[8e9cbb2] | 245 | assert( false && "Typedefs are removed and substituted in earlier passes." ); |
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| 246 | //output << "typedef "; |
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| 247 | //output << genType( typeDecl->get_base(), typeDecl->get_name() ); |
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[51587aa] | 248 | } |
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[71f4e4f] | 249 | |
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[8688ce1] | 250 | void CodeGenerator::visit( TypeDecl * typeDecl ) { |
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[51587aa] | 251 | // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes, |
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| 252 | // still to be done |
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[8e9cbb2] | 253 | extension( typeDecl ); |
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[6c4ff37] | 254 | output << "extern unsigned long " << typeDecl->get_name(); |
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[51587aa] | 255 | if ( typeDecl->get_base() ) { |
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[6c4ff37] | 256 | output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )"; |
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[51587aa] | 257 | } // if |
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| 258 | } |
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| 259 | |
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[e45215c] | 260 | void CodeGenerator::printDesignators( std::list< Expression * > & designators ) { |
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| 261 | typedef std::list< Expression * > DesignatorList; |
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| 262 | if ( designators.size() == 0 ) return; |
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| 263 | for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) { |
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[8a4da06] | 264 | if ( dynamic_cast< NameExpr * >( *iter ) ) { |
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[f32c7f4] | 265 | // if expression is a name, then initializing aggregate member |
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| 266 | output << "."; |
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| 267 | (*iter)->accept( *this ); |
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| 268 | } else { |
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| 269 | // if not a simple name, it has to be a constant expression, i.e. an array designator |
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[e45215c] | 270 | output << "["; |
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| 271 | (*iter)->accept( *this ); |
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| 272 | output << "]"; |
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[3778cb2] | 273 | } // if |
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| 274 | } // for |
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[e45215c] | 275 | output << " = "; |
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| 276 | } |
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| 277 | |
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[8688ce1] | 278 | void CodeGenerator::visit( SingleInit * init ) { |
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[e45215c] | 279 | printDesignators( init->get_designators() ); |
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[51587aa] | 280 | init->get_value()->accept( *this ); |
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| 281 | } |
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| 282 | |
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[8688ce1] | 283 | void CodeGenerator::visit( ListInit * init ) { |
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[e45215c] | 284 | printDesignators( init->get_designators() ); |
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[6c4ff37] | 285 | output << "{ "; |
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[4d2434a] | 286 | if ( init->begin() == init->end() ) { |
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[8e9cbb2] | 287 | // illegal to leave initializer list empty for scalar initializers, but always legal to have 0 |
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[5b40f30] | 288 | output << "0"; |
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| 289 | } else { |
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[4d2434a] | 290 | genCommaList( init->begin(), init->end() ); |
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[8688ce1] | 291 | } // if |
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[6c4ff37] | 292 | output << " }"; |
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[51587aa] | 293 | } |
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| 294 | |
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[fc638d2] | 295 | void CodeGenerator::visit( ConstructorInit * init ){ |
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| 296 | assertf( false, "ConstructorInit nodes should not make it to CodeGen." ); |
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| 297 | } |
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| 298 | |
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[8688ce1] | 299 | void CodeGenerator::visit( Constant * constant ) { |
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[6c4ff37] | 300 | output << constant->get_value() ; |
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[51587aa] | 301 | } |
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| 302 | |
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| 303 | //*** Expressions |
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[8688ce1] | 304 | void CodeGenerator::visit( ApplicationExpr * applicationExpr ) { |
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[e04ef3a] | 305 | extension( applicationExpr ); |
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[8688ce1] | 306 | if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) { |
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[51587aa] | 307 | OperatorInfo opInfo; |
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| 308 | if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) { |
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| 309 | std::list< Expression* >::iterator arg = applicationExpr->get_args().begin(); |
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| 310 | switch ( opInfo.type ) { |
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| 311 | case OT_PREFIXASSIGN: |
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| 312 | case OT_POSTFIXASSIGN: |
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| 313 | case OT_INFIXASSIGN: |
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[356189a] | 314 | case OT_CTOR: |
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[c2ce2350] | 315 | case OT_DTOR: |
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[51587aa] | 316 | { |
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| 317 | assert( arg != applicationExpr->get_args().end() ); |
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[8688ce1] | 318 | if ( AddressExpr * addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) { |
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[356189a] | 319 | // remove & from first assignment/ctor argument |
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[51587aa] | 320 | *arg = addrExpr->get_arg(); |
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| 321 | } else { |
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[356189a] | 322 | // no address-of operator, so must be a pointer - add dereference |
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[066d77a] | 323 | // NOTE: if the assertion starts to trigger, check that the application expr isn't being shared. |
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| 324 | // Since its arguments are modified here, this assertion most commonly triggers when the application |
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| 325 | // is visited multiple times. |
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[8688ce1] | 326 | UntypedExpr * newExpr = new UntypedExpr( new NameExpr( "*?" ) ); |
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[51587aa] | 327 | newExpr->get_args().push_back( *arg ); |
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[906e24d] | 328 | Type * type = InitTweak::getPointerBase( (*arg)->get_result() ); |
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[066d77a] | 329 | assertf( type, "First argument to a derefence must be a pointer. Ensure that expressions are not being shared." ); |
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[906e24d] | 330 | newExpr->set_result( type->clone() ); |
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[51587aa] | 331 | *arg = newExpr; |
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| 332 | } // if |
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| 333 | break; |
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| 334 | } |
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[71f4e4f] | 335 | |
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[51587aa] | 336 | default: |
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| 337 | // do nothing |
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| 338 | ; |
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[3778cb2] | 339 | } // switch |
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[71f4e4f] | 340 | |
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[51587aa] | 341 | switch ( opInfo.type ) { |
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| 342 | case OT_INDEX: |
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| 343 | assert( applicationExpr->get_args().size() == 2 ); |
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| 344 | (*arg++)->accept( *this ); |
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[6c4ff37] | 345 | output << "["; |
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[51587aa] | 346 | (*arg)->accept( *this ); |
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[6c4ff37] | 347 | output << "]"; |
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[51587aa] | 348 | break; |
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[71f4e4f] | 349 | |
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[51587aa] | 350 | case OT_CALL: |
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[356189a] | 351 | // there are no intrinsic definitions of the function call operator |
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[51587aa] | 352 | assert( false ); |
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| 353 | break; |
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[71f4e4f] | 354 | |
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[f1e012b] | 355 | case OT_CTOR: |
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[c2ce2350] | 356 | case OT_DTOR: |
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[356189a] | 357 | if ( applicationExpr->get_args().size() == 1 ) { |
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[8e9cbb2] | 358 | // the expression fed into a single parameter constructor or destructor may contain side |
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| 359 | // effects, so must still output this expression |
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[64071c2] | 360 | output << "("; |
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[356189a] | 361 | (*arg++)->accept( *this ); |
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[64071c2] | 362 | output << ") /* " << opInfo.inputName << " */"; |
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[356189a] | 363 | } else if ( applicationExpr->get_args().size() == 2 ) { |
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[c2ce2350] | 364 | // intrinsic two parameter constructors are essentially bitwise assignment |
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[356189a] | 365 | output << "("; |
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| 366 | (*arg++)->accept( *this ); |
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| 367 | output << opInfo.symbol; |
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| 368 | (*arg)->accept( *this ); |
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[c2ce2350] | 369 | output << ") /* " << opInfo.inputName << " */"; |
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[356189a] | 370 | } else { |
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[c2ce2350] | 371 | // no constructors with 0 or more than 2 parameters |
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[356189a] | 372 | assert( false ); |
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[8688ce1] | 373 | } // if |
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[356189a] | 374 | break; |
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[f1e012b] | 375 | |
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[51587aa] | 376 | case OT_PREFIX: |
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| 377 | case OT_PREFIXASSIGN: |
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| 378 | assert( applicationExpr->get_args().size() == 1 ); |
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[6c4ff37] | 379 | output << "("; |
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| 380 | output << opInfo.symbol; |
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[51587aa] | 381 | (*arg)->accept( *this ); |
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[6c4ff37] | 382 | output << ")"; |
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[51587aa] | 383 | break; |
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[71f4e4f] | 384 | |
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[51587aa] | 385 | case OT_POSTFIX: |
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| 386 | case OT_POSTFIXASSIGN: |
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| 387 | assert( applicationExpr->get_args().size() == 1 ); |
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| 388 | (*arg)->accept( *this ); |
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[6c4ff37] | 389 | output << opInfo.symbol; |
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[51587aa] | 390 | break; |
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| 391 | |
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[f1e012b] | 392 | |
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[51587aa] | 393 | case OT_INFIX: |
---|
| 394 | case OT_INFIXASSIGN: |
---|
| 395 | assert( applicationExpr->get_args().size() == 2 ); |
---|
[6c4ff37] | 396 | output << "("; |
---|
[51587aa] | 397 | (*arg++)->accept( *this ); |
---|
[6c4ff37] | 398 | output << opInfo.symbol; |
---|
[51587aa] | 399 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 400 | output << ")"; |
---|
[51587aa] | 401 | break; |
---|
[71f4e4f] | 402 | |
---|
[51587aa] | 403 | case OT_CONSTANT: |
---|
[721f17a] | 404 | case OT_LABELADDRESS: |
---|
| 405 | // there are no intrinsic definitions of 0/1 or label addresses as functions |
---|
[51587aa] | 406 | assert( false ); |
---|
[3778cb2] | 407 | } // switch |
---|
[17cd4eb] | 408 | } else { |
---|
[51587aa] | 409 | varExpr->accept( *this ); |
---|
[6c4ff37] | 410 | output << "("; |
---|
[51587aa] | 411 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
---|
[6c4ff37] | 412 | output << ")"; |
---|
[17cd4eb] | 413 | } // if |
---|
[51587aa] | 414 | } else { |
---|
| 415 | applicationExpr->get_function()->accept( *this ); |
---|
[6c4ff37] | 416 | output << "("; |
---|
[51587aa] | 417 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
---|
[6c4ff37] | 418 | output << ")"; |
---|
[51587aa] | 419 | } // if |
---|
| 420 | } |
---|
[71f4e4f] | 421 | |
---|
[8688ce1] | 422 | void CodeGenerator::visit( UntypedExpr * untypedExpr ) { |
---|
[e04ef3a] | 423 | extension( untypedExpr ); |
---|
[8688ce1] | 424 | if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) { |
---|
[51587aa] | 425 | OperatorInfo opInfo; |
---|
| 426 | if ( operatorLookup( nameExpr->get_name(), opInfo ) ) { |
---|
| 427 | std::list< Expression* >::iterator arg = untypedExpr->get_args().begin(); |
---|
| 428 | switch ( opInfo.type ) { |
---|
| 429 | case OT_INDEX: |
---|
| 430 | assert( untypedExpr->get_args().size() == 2 ); |
---|
| 431 | (*arg++)->accept( *this ); |
---|
[6c4ff37] | 432 | output << "["; |
---|
[51587aa] | 433 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 434 | output << "]"; |
---|
[51587aa] | 435 | break; |
---|
[71f4e4f] | 436 | |
---|
[51587aa] | 437 | case OT_CALL: |
---|
[f1e012b] | 438 | assert( false ); |
---|
| 439 | |
---|
[c2ce2350] | 440 | case OT_CTOR: |
---|
| 441 | case OT_DTOR: |
---|
| 442 | if ( untypedExpr->get_args().size() == 1 ) { |
---|
[8e9cbb2] | 443 | // the expression fed into a single parameter constructor or destructor may contain side |
---|
| 444 | // effects, so must still output this expression |
---|
[64071c2] | 445 | output << "("; |
---|
[c2ce2350] | 446 | (*arg++)->accept( *this ); |
---|
[64071c2] | 447 | output << ") /* " << opInfo.inputName << " */"; |
---|
[c2ce2350] | 448 | } else if ( untypedExpr->get_args().size() == 2 ) { |
---|
| 449 | // intrinsic two parameter constructors are essentially bitwise assignment |
---|
| 450 | output << "("; |
---|
| 451 | (*arg++)->accept( *this ); |
---|
| 452 | output << opInfo.symbol; |
---|
| 453 | (*arg)->accept( *this ); |
---|
| 454 | output << ") /* " << opInfo.inputName << " */"; |
---|
| 455 | } else { |
---|
| 456 | // no constructors with 0 or more than 2 parameters |
---|
| 457 | assert( false ); |
---|
[3778cb2] | 458 | } // if |
---|
[51587aa] | 459 | break; |
---|
[71f4e4f] | 460 | |
---|
[51587aa] | 461 | case OT_PREFIX: |
---|
| 462 | case OT_PREFIXASSIGN: |
---|
[de62360d] | 463 | case OT_LABELADDRESS: |
---|
[51587aa] | 464 | assert( untypedExpr->get_args().size() == 1 ); |
---|
[6c4ff37] | 465 | output << "("; |
---|
| 466 | output << opInfo.symbol; |
---|
[51587aa] | 467 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 468 | output << ")"; |
---|
[51587aa] | 469 | break; |
---|
[71f4e4f] | 470 | |
---|
[51587aa] | 471 | case OT_POSTFIX: |
---|
| 472 | case OT_POSTFIXASSIGN: |
---|
| 473 | assert( untypedExpr->get_args().size() == 1 ); |
---|
| 474 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 475 | output << opInfo.symbol; |
---|
[51587aa] | 476 | break; |
---|
[71f4e4f] | 477 | |
---|
[51587aa] | 478 | case OT_INFIX: |
---|
| 479 | case OT_INFIXASSIGN: |
---|
| 480 | assert( untypedExpr->get_args().size() == 2 ); |
---|
[6c4ff37] | 481 | output << "("; |
---|
[51587aa] | 482 | (*arg++)->accept( *this ); |
---|
[6c4ff37] | 483 | output << opInfo.symbol; |
---|
[51587aa] | 484 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 485 | output << ")"; |
---|
[51587aa] | 486 | break; |
---|
[71f4e4f] | 487 | |
---|
[51587aa] | 488 | case OT_CONSTANT: |
---|
| 489 | // there are no intrinsic definitions of 0 or 1 as functions |
---|
| 490 | assert( false ); |
---|
[3778cb2] | 491 | } // switch |
---|
[51587aa] | 492 | } else { |
---|
[8688ce1] | 493 | if ( nameExpr->get_name() == "..." ) { // case V1 ... V2 or case V1~V2 |
---|
[ac911f4] | 494 | assert( untypedExpr->get_args().size() == 2 ); |
---|
| 495 | (*untypedExpr->get_args().begin())->accept( *this ); |
---|
| 496 | output << " ... "; |
---|
| 497 | (*--untypedExpr->get_args().end())->accept( *this ); |
---|
[057b34f] | 498 | } else { // builtin routines |
---|
| 499 | nameExpr->accept( *this ); |
---|
| 500 | output << "("; |
---|
| 501 | genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() ); |
---|
| 502 | output << ")"; |
---|
[66d12f7] | 503 | } // if |
---|
[51587aa] | 504 | } // if |
---|
| 505 | } else { |
---|
| 506 | untypedExpr->get_function()->accept( *this ); |
---|
[6c4ff37] | 507 | output << "("; |
---|
[51587aa] | 508 | genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() ); |
---|
[6c4ff37] | 509 | output << ")"; |
---|
[51587aa] | 510 | } // if |
---|
| 511 | } |
---|
[71f4e4f] | 512 | |
---|
[064e3ff] | 513 | void CodeGenerator::visit( RangeExpr * rangeExpr ) { |
---|
| 514 | rangeExpr->get_low()->accept( *this ); |
---|
| 515 | output << " ... "; |
---|
| 516 | rangeExpr->get_high()->accept( *this ); |
---|
| 517 | } |
---|
| 518 | |
---|
[8688ce1] | 519 | void CodeGenerator::visit( NameExpr * nameExpr ) { |
---|
[e04ef3a] | 520 | extension( nameExpr ); |
---|
[51587aa] | 521 | OperatorInfo opInfo; |
---|
| 522 | if ( operatorLookup( nameExpr->get_name(), opInfo ) ) { |
---|
| 523 | assert( opInfo.type == OT_CONSTANT ); |
---|
[6c4ff37] | 524 | output << opInfo.symbol; |
---|
[51587aa] | 525 | } else { |
---|
[6c4ff37] | 526 | output << nameExpr->get_name(); |
---|
[51587aa] | 527 | } // if |
---|
| 528 | } |
---|
[71f4e4f] | 529 | |
---|
[8688ce1] | 530 | void CodeGenerator::visit( AddressExpr * addressExpr ) { |
---|
[e04ef3a] | 531 | extension( addressExpr ); |
---|
[6c4ff37] | 532 | output << "(&"; |
---|
[51587aa] | 533 | // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address |
---|
[8688ce1] | 534 | if ( VariableExpr * variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) { |
---|
[6c4ff37] | 535 | output << mangleName( variableExpr->get_var() ); |
---|
[51587aa] | 536 | } else { |
---|
| 537 | addressExpr->get_arg()->accept( *this ); |
---|
| 538 | } // if |
---|
[6c4ff37] | 539 | output << ")"; |
---|
[51587aa] | 540 | } |
---|
| 541 | |
---|
[8688ce1] | 542 | void CodeGenerator::visit( CastExpr * castExpr ) { |
---|
[e04ef3a] | 543 | extension( castExpr ); |
---|
[803deb1] | 544 | output << "("; |
---|
[906e24d] | 545 | if ( castExpr->get_result()->isVoid() ) { |
---|
[803deb1] | 546 | output << "(void)" ; |
---|
[906e24d] | 547 | } else if ( ! castExpr->get_result()->get_isLvalue() ) { |
---|
[803deb1] | 548 | // at least one result type of cast, but not an lvalue |
---|
| 549 | output << "("; |
---|
[906e24d] | 550 | output << genType( castExpr->get_result(), "" ); |
---|
[71f4e4f] | 551 | output << ")"; |
---|
[803deb1] | 552 | } else { |
---|
[8e9cbb2] | 553 | // otherwise, the cast is to an lvalue type, so the cast should be dropped, since the result of a cast is |
---|
[803deb1] | 554 | // never an lvalue in C |
---|
[3778cb2] | 555 | } // if |
---|
[803deb1] | 556 | castExpr->get_arg()->accept( *this ); |
---|
| 557 | output << ")"; |
---|
[51587aa] | 558 | } |
---|
[71f4e4f] | 559 | |
---|
[8688ce1] | 560 | void CodeGenerator::visit( UntypedMemberExpr * memberExpr ) { |
---|
[51587aa] | 561 | assert( false ); |
---|
| 562 | } |
---|
[71f4e4f] | 563 | |
---|
[8688ce1] | 564 | void CodeGenerator::visit( MemberExpr * memberExpr ) { |
---|
[e04ef3a] | 565 | extension( memberExpr ); |
---|
[51587aa] | 566 | memberExpr->get_aggregate()->accept( *this ); |
---|
[6c4ff37] | 567 | output << "." << mangleName( memberExpr->get_member() ); |
---|
[51587aa] | 568 | } |
---|
[71f4e4f] | 569 | |
---|
[8688ce1] | 570 | void CodeGenerator::visit( VariableExpr * variableExpr ) { |
---|
[e04ef3a] | 571 | extension( variableExpr ); |
---|
[51587aa] | 572 | OperatorInfo opInfo; |
---|
| 573 | if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) { |
---|
[6c4ff37] | 574 | output << opInfo.symbol; |
---|
[51587aa] | 575 | } else { |
---|
[6c4ff37] | 576 | output << mangleName( variableExpr->get_var() ); |
---|
[51587aa] | 577 | } // if |
---|
| 578 | } |
---|
[71f4e4f] | 579 | |
---|
[8688ce1] | 580 | void CodeGenerator::visit( ConstantExpr * constantExpr ) { |
---|
[51587aa] | 581 | assert( constantExpr->get_constant() ); |
---|
[e04ef3a] | 582 | extension( constantExpr ); |
---|
[51587aa] | 583 | constantExpr->get_constant()->accept( *this ); |
---|
| 584 | } |
---|
[71f4e4f] | 585 | |
---|
[8688ce1] | 586 | void CodeGenerator::visit( SizeofExpr * sizeofExpr ) { |
---|
[e04ef3a] | 587 | extension( sizeofExpr ); |
---|
[6c4ff37] | 588 | output << "sizeof("; |
---|
[51587aa] | 589 | if ( sizeofExpr->get_isType() ) { |
---|
[6c4ff37] | 590 | output << genType( sizeofExpr->get_type(), "" ); |
---|
[51587aa] | 591 | } else { |
---|
| 592 | sizeofExpr->get_expr()->accept( *this ); |
---|
| 593 | } // if |
---|
[6c4ff37] | 594 | output << ")"; |
---|
[51587aa] | 595 | } |
---|
[47534159] | 596 | |
---|
[8688ce1] | 597 | void CodeGenerator::visit( AlignofExpr * alignofExpr ) { |
---|
[47534159] | 598 | // use GCC extension to avoid bumping std to C11 |
---|
[8e9cbb2] | 599 | extension( alignofExpr ); |
---|
[47534159] | 600 | output << "__alignof__("; |
---|
[25a054f] | 601 | if ( alignofExpr->get_isType() ) { |
---|
| 602 | output << genType( alignofExpr->get_type(), "" ); |
---|
[47534159] | 603 | } else { |
---|
[25a054f] | 604 | alignofExpr->get_expr()->accept( *this ); |
---|
[47534159] | 605 | } // if |
---|
| 606 | output << ")"; |
---|
| 607 | } |
---|
[71f4e4f] | 608 | |
---|
[8688ce1] | 609 | void CodeGenerator::visit( UntypedOffsetofExpr * offsetofExpr ) { |
---|
[8e9cbb2] | 610 | assert( false && "UntypedOffsetofExpr should not reach code generation." ); |
---|
[2a4b088] | 611 | } |
---|
| 612 | |
---|
[8688ce1] | 613 | void CodeGenerator::visit( OffsetofExpr * offsetofExpr ) { |
---|
[25a054f] | 614 | // use GCC builtin |
---|
| 615 | output << "__builtin_offsetof("; |
---|
| 616 | output << genType( offsetofExpr->get_type(), "" ); |
---|
[e551c69] | 617 | output << ", " << mangleName( offsetofExpr->get_member() ); |
---|
[25a054f] | 618 | output << ")"; |
---|
| 619 | } |
---|
[d63eeb0] | 620 | |
---|
[8688ce1] | 621 | void CodeGenerator::visit( OffsetPackExpr * offsetPackExpr ) { |
---|
[8e9cbb2] | 622 | assert( false && "OffsetPackExpr should not reach code generation." ); |
---|
[afc1045] | 623 | } |
---|
[70a06f6] | 624 | |
---|
[8688ce1] | 625 | void CodeGenerator::visit( LogicalExpr * logicalExpr ) { |
---|
[e04ef3a] | 626 | extension( logicalExpr ); |
---|
[6c4ff37] | 627 | output << "("; |
---|
[51587aa] | 628 | logicalExpr->get_arg1()->accept( *this ); |
---|
| 629 | if ( logicalExpr->get_isAnd() ) { |
---|
[6c4ff37] | 630 | output << " && "; |
---|
[51587aa] | 631 | } else { |
---|
[6c4ff37] | 632 | output << " || "; |
---|
[51587aa] | 633 | } // if |
---|
| 634 | logicalExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 635 | output << ")"; |
---|
[51587aa] | 636 | } |
---|
[71f4e4f] | 637 | |
---|
[8688ce1] | 638 | void CodeGenerator::visit( ConditionalExpr * conditionalExpr ) { |
---|
[e04ef3a] | 639 | extension( conditionalExpr ); |
---|
[6c4ff37] | 640 | output << "("; |
---|
[51587aa] | 641 | conditionalExpr->get_arg1()->accept( *this ); |
---|
[6c4ff37] | 642 | output << " ? "; |
---|
[51587aa] | 643 | conditionalExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 644 | output << " : "; |
---|
[51587aa] | 645 | conditionalExpr->get_arg3()->accept( *this ); |
---|
[6c4ff37] | 646 | output << ")"; |
---|
[51587aa] | 647 | } |
---|
[71f4e4f] | 648 | |
---|
[8688ce1] | 649 | void CodeGenerator::visit( CommaExpr * commaExpr ) { |
---|
[e04ef3a] | 650 | extension( commaExpr ); |
---|
[6c4ff37] | 651 | output << "("; |
---|
[51587aa] | 652 | commaExpr->get_arg1()->accept( *this ); |
---|
[6c4ff37] | 653 | output << " , "; |
---|
[51587aa] | 654 | commaExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 655 | output << ")"; |
---|
[51587aa] | 656 | } |
---|
[71f4e4f] | 657 | |
---|
[907eccb] | 658 | void CodeGenerator::visit( UntypedTupleExpr * tupleExpr ) { assertf( false, "UntypedTupleExpr should not make it to Code Gen" ); } |
---|
| 659 | |
---|
| 660 | void CodeGenerator::visit( TupleExpr * tupleExpr ) { assertf( false, "TupleExpr should not make it to Code Gen" ); } |
---|
[71f4e4f] | 661 | |
---|
[8688ce1] | 662 | void CodeGenerator::visit( TypeExpr * typeExpr ) {} |
---|
[2b6c1e0] | 663 | |
---|
[8688ce1] | 664 | void CodeGenerator::visit( AsmExpr * asmExpr ) { |
---|
[7f5566b] | 665 | if ( asmExpr->get_inout() ) { |
---|
| 666 | output << "[ "; |
---|
| 667 | asmExpr->get_inout()->accept( *this ); |
---|
| 668 | output << " ] "; |
---|
| 669 | } // if |
---|
| 670 | asmExpr->get_constraint()->accept( *this ); |
---|
| 671 | output << " ( "; |
---|
| 672 | asmExpr->get_operand()->accept( *this ); |
---|
| 673 | output << " )"; |
---|
| 674 | } |
---|
| 675 | |
---|
[3c13c03] | 676 | void CodeGenerator::visit( CompoundLiteralExpr *compLitExpr ) { |
---|
| 677 | assert( compLitExpr->get_type() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) ); |
---|
| 678 | output << "(" << genType( compLitExpr->get_type(), "" ) << ")"; |
---|
| 679 | compLitExpr->get_initializer()->accept( *this ); |
---|
| 680 | } |
---|
| 681 | |
---|
[6eb8948] | 682 | void CodeGenerator::visit( StmtExpr * stmtExpr ) { |
---|
[3c13c03] | 683 | std::list< Statement * > & stmts = stmtExpr->get_statements()->get_kids(); |
---|
| 684 | output << "({" << std::endl; |
---|
| 685 | cur_indent += CodeGenerator::tabsize; |
---|
| 686 | unsigned int numStmts = stmts.size(); |
---|
| 687 | unsigned int i = 0; |
---|
| 688 | for ( Statement * stmt : stmts ) { |
---|
| 689 | output << indent << printLabels( stmt->get_labels() ); |
---|
| 690 | if ( i+1 == numStmts ) { |
---|
| 691 | // last statement in a statement expression needs to be handled specially - |
---|
| 692 | // cannot cast to void, otherwise the expression statement has no value |
---|
| 693 | if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) { |
---|
| 694 | exprStmt->get_expr()->accept( *this ); |
---|
| 695 | output << ";" << endl; |
---|
| 696 | ++i; |
---|
| 697 | break; |
---|
| 698 | } |
---|
| 699 | } |
---|
| 700 | stmt->accept( *this ); |
---|
| 701 | output << endl; |
---|
| 702 | if ( wantSpacing( stmt ) ) { |
---|
| 703 | output << endl; |
---|
| 704 | } // if |
---|
| 705 | ++i; |
---|
| 706 | } |
---|
| 707 | cur_indent -= CodeGenerator::tabsize; |
---|
| 708 | output << indent << "})"; |
---|
[6eb8948] | 709 | } |
---|
| 710 | |
---|
[51587aa] | 711 | //*** Statements |
---|
[8688ce1] | 712 | void CodeGenerator::visit( CompoundStmt * compoundStmt ) { |
---|
[51587aa] | 713 | std::list<Statement*> ks = compoundStmt->get_kids(); |
---|
[2b6c1e0] | 714 | output << "{" << endl; |
---|
[51587aa] | 715 | |
---|
[2b6c1e0] | 716 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 717 | |
---|
[7f5566b] | 718 | for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) { |
---|
[cda48b6] | 719 | output << indent << printLabels( (*i)->get_labels() ); |
---|
[7f5566b] | 720 | (*i)->accept( *this ); |
---|
[2b6c1e0] | 721 | |
---|
[6c4ff37] | 722 | output << endl; |
---|
[2b6c1e0] | 723 | if ( wantSpacing( *i ) ) { |
---|
| 724 | output << endl; |
---|
[3778cb2] | 725 | } // if |
---|
[8688ce1] | 726 | } // for |
---|
[71f4e4f] | 727 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 728 | |
---|
[cda48b6] | 729 | output << indent << "}"; |
---|
[51587aa] | 730 | } |
---|
| 731 | |
---|
[8688ce1] | 732 | void CodeGenerator::visit( ExprStmt * exprStmt ) { |
---|
[6c4ff37] | 733 | assert( exprStmt ); |
---|
[321a2481] | 734 | // cast the top-level expression to void to reduce gcc warnings. |
---|
| 735 | Expression * expr = new CastExpr( exprStmt->get_expr() ); |
---|
| 736 | expr->accept( *this ); |
---|
| 737 | output << ";"; |
---|
[51587aa] | 738 | } |
---|
| 739 | |
---|
[8688ce1] | 740 | void CodeGenerator::visit( AsmStmt * asmStmt ) { |
---|
[7f5566b] | 741 | output << "asm "; |
---|
| 742 | if ( asmStmt->get_voltile() ) output << "volatile "; |
---|
| 743 | if ( ! asmStmt->get_gotolabels().empty() ) output << "goto "; |
---|
| 744 | output << "( "; |
---|
| 745 | if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this ); |
---|
| 746 | output << " : "; |
---|
| 747 | genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() ); |
---|
| 748 | output << " : "; |
---|
| 749 | genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() ); |
---|
| 750 | output << " : "; |
---|
| 751 | genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() ); |
---|
| 752 | if ( ! asmStmt->get_gotolabels().empty() ) { |
---|
| 753 | output << " : "; |
---|
| 754 | for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) { |
---|
| 755 | output << *begin++; |
---|
| 756 | if ( begin == asmStmt->get_gotolabels().end() ) break; |
---|
| 757 | output << ", "; |
---|
| 758 | } // for |
---|
| 759 | } // if |
---|
| 760 | output << " );" ; |
---|
| 761 | } |
---|
| 762 | |
---|
[8688ce1] | 763 | void CodeGenerator::visit( IfStmt * ifStmt ) { |
---|
[7f5566b] | 764 | output << "if ( "; |
---|
| 765 | ifStmt->get_condition()->accept( *this ); |
---|
| 766 | output << " ) "; |
---|
[51587aa] | 767 | |
---|
[7f5566b] | 768 | ifStmt->get_thenPart()->accept( *this ); |
---|
[51587aa] | 769 | |
---|
| 770 | if ( ifStmt->get_elsePart() != 0) { |
---|
[2b6c1e0] | 771 | output << " else "; |
---|
[7f5566b] | 772 | ifStmt->get_elsePart()->accept( *this ); |
---|
[51587aa] | 773 | } // if |
---|
| 774 | } |
---|
| 775 | |
---|
[8688ce1] | 776 | void CodeGenerator::visit( SwitchStmt * switchStmt ) { |
---|
[7f5566b] | 777 | output << "switch ( " ; |
---|
| 778 | switchStmt->get_condition()->accept( *this ); |
---|
| 779 | output << " ) "; |
---|
[71f4e4f] | 780 | |
---|
[2b6c1e0] | 781 | output << "{" << std::endl; |
---|
[6c4ff37] | 782 | cur_indent += CodeGenerator::tabsize; |
---|
[8688ce1] | 783 | acceptAll( switchStmt->get_statements(), *this ); |
---|
[6c4ff37] | 784 | cur_indent -= CodeGenerator::tabsize; |
---|
[cda48b6] | 785 | output << indent << "}"; |
---|
[51587aa] | 786 | } |
---|
| 787 | |
---|
[8688ce1] | 788 | void CodeGenerator::visit( CaseStmt * caseStmt ) { |
---|
[cda48b6] | 789 | output << indent; |
---|
[eb3261f] | 790 | if ( caseStmt->isDefault()) { |
---|
[2b6c1e0] | 791 | output << "default"; |
---|
[eb3261f] | 792 | } else { |
---|
[2b6c1e0] | 793 | output << "case "; |
---|
[7f5566b] | 794 | caseStmt->get_condition()->accept( *this ); |
---|
[17cd4eb] | 795 | } // if |
---|
[6c4ff37] | 796 | output << ":\n"; |
---|
[71f4e4f] | 797 | |
---|
[51587aa] | 798 | std::list<Statement *> sts = caseStmt->get_statements(); |
---|
| 799 | |
---|
[6c4ff37] | 800 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 801 | for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) { |
---|
[cda48b6] | 802 | output << indent << printLabels( (*i)->get_labels() ) ; |
---|
[7f5566b] | 803 | (*i)->accept( *this ); |
---|
[6c4ff37] | 804 | output << endl; |
---|
[3778cb2] | 805 | } // for |
---|
[6c4ff37] | 806 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 807 | } |
---|
| 808 | |
---|
[8688ce1] | 809 | void CodeGenerator::visit( BranchStmt * branchStmt ) { |
---|
[51587aa] | 810 | switch ( branchStmt->get_type()) { |
---|
| 811 | case BranchStmt::Goto: |
---|
| 812 | if ( ! branchStmt->get_target().empty() ) |
---|
[6c4ff37] | 813 | output << "goto " << branchStmt->get_target(); |
---|
[71f4e4f] | 814 | else { |
---|
[51587aa] | 815 | if ( branchStmt->get_computedTarget() != 0 ) { |
---|
[6c4ff37] | 816 | output << "goto *"; |
---|
[51587aa] | 817 | branchStmt->get_computedTarget()->accept( *this ); |
---|
| 818 | } // if |
---|
| 819 | } // if |
---|
| 820 | break; |
---|
| 821 | case BranchStmt::Break: |
---|
[6c4ff37] | 822 | output << "break"; |
---|
[51587aa] | 823 | break; |
---|
| 824 | case BranchStmt::Continue: |
---|
[6c4ff37] | 825 | output << "continue"; |
---|
[51587aa] | 826 | break; |
---|
[3778cb2] | 827 | } // switch |
---|
[2b6c1e0] | 828 | output << ";"; |
---|
[51587aa] | 829 | } |
---|
| 830 | |
---|
| 831 | |
---|
[8688ce1] | 832 | void CodeGenerator::visit( ReturnStmt * returnStmt ) { |
---|
[6c4ff37] | 833 | output << "return "; |
---|
[4b2589a] | 834 | maybeAccept( returnStmt->get_expr(), *this ); |
---|
[6c4ff37] | 835 | output << ";"; |
---|
[51587aa] | 836 | } |
---|
| 837 | |
---|
[8688ce1] | 838 | void CodeGenerator::visit( WhileStmt * whileStmt ) { |
---|
[321a2481] | 839 | if ( whileStmt->get_isDoWhile() ) { |
---|
[6c4ff37] | 840 | output << "do" ; |
---|
[321a2481] | 841 | } else { |
---|
[6c4ff37] | 842 | output << "while (" ; |
---|
[7f5566b] | 843 | whileStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 844 | output << ")"; |
---|
[51587aa] | 845 | } // if |
---|
[2b6c1e0] | 846 | output << " "; |
---|
[51587aa] | 847 | |
---|
[2b6c1e0] | 848 | output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() ); |
---|
[51587aa] | 849 | whileStmt->get_body()->accept( *this ); |
---|
| 850 | |
---|
[cda48b6] | 851 | output << indent; |
---|
[51587aa] | 852 | |
---|
| 853 | if ( whileStmt->get_isDoWhile() ) { |
---|
[6c4ff37] | 854 | output << " while (" ; |
---|
[7f5566b] | 855 | whileStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 856 | output << ");"; |
---|
[51587aa] | 857 | } // if |
---|
| 858 | } |
---|
| 859 | |
---|
[8688ce1] | 860 | void CodeGenerator::visit( ForStmt * forStmt ) { |
---|
[8e9cbb2] | 861 | // initialization is always hoisted, so don't bother doing anything with that |
---|
[145f1fc] | 862 | output << "for (;"; |
---|
[51587aa] | 863 | |
---|
[321a2481] | 864 | if ( forStmt->get_condition() != 0 ) { |
---|
[51587aa] | 865 | forStmt->get_condition()->accept( *this ); |
---|
[3778cb2] | 866 | } // if |
---|
[6c4ff37] | 867 | output << ";"; |
---|
[51587aa] | 868 | |
---|
[321a2481] | 869 | if ( forStmt->get_increment() != 0 ) { |
---|
| 870 | // cast the top-level expression to void to reduce gcc warnings. |
---|
| 871 | Expression * expr = new CastExpr( forStmt->get_increment() ); |
---|
| 872 | expr->accept( *this ); |
---|
[3778cb2] | 873 | } // if |
---|
[2b6c1e0] | 874 | output << ") "; |
---|
[51587aa] | 875 | |
---|
| 876 | if ( forStmt->get_body() != 0 ) { |
---|
[2b6c1e0] | 877 | output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() ); |
---|
[51587aa] | 878 | forStmt->get_body()->accept( *this ); |
---|
| 879 | } // if |
---|
| 880 | } |
---|
| 881 | |
---|
[8688ce1] | 882 | void CodeGenerator::visit( NullStmt * nullStmt ) { |
---|
[cda48b6] | 883 | //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() ); |
---|
[6c4ff37] | 884 | output << "/* null statement */ ;"; |
---|
[51587aa] | 885 | } |
---|
| 886 | |
---|
[8688ce1] | 887 | void CodeGenerator::visit( DeclStmt * declStmt ) { |
---|
[51587aa] | 888 | declStmt->get_decl()->accept( *this ); |
---|
[71f4e4f] | 889 | |
---|
[51587aa] | 890 | if ( doSemicolon( declStmt->get_decl() ) ) { |
---|
[6c4ff37] | 891 | output << ";"; |
---|
[51587aa] | 892 | } // if |
---|
| 893 | } |
---|
| 894 | |
---|
[8688ce1] | 895 | void CodeGenerator::handleStorageClass( Declaration * decl ) { |
---|
[51587aa] | 896 | switch ( decl->get_storageClass() ) { |
---|
[68cd1ce] | 897 | case DeclarationNode::Extern: |
---|
[6c4ff37] | 898 | output << "extern "; |
---|
[51587aa] | 899 | break; |
---|
[68cd1ce] | 900 | case DeclarationNode::Static: |
---|
[6c4ff37] | 901 | output << "static "; |
---|
[51587aa] | 902 | break; |
---|
[68cd1ce] | 903 | case DeclarationNode::Auto: |
---|
[51587aa] | 904 | // silently drop storage class |
---|
| 905 | break; |
---|
[68cd1ce] | 906 | case DeclarationNode::Register: |
---|
[6c4ff37] | 907 | output << "register "; |
---|
[51587aa] | 908 | break; |
---|
[68cd1ce] | 909 | case DeclarationNode::Inline: |
---|
[de62360d] | 910 | output << "inline "; |
---|
[f38c8d9] | 911 | break; |
---|
[68cd1ce] | 912 | case DeclarationNode::Fortran: |
---|
| 913 | output << "fortran "; |
---|
| 914 | break; |
---|
| 915 | case DeclarationNode::Noreturn: |
---|
| 916 | output << "_Noreturn "; |
---|
| 917 | break; |
---|
| 918 | case DeclarationNode::Threadlocal: |
---|
| 919 | output << "_Thread_local "; |
---|
| 920 | break; |
---|
| 921 | case DeclarationNode::NoStorageClass: |
---|
[f38c8d9] | 922 | break; |
---|
[843054c2] | 923 | } // switch |
---|
[51587aa] | 924 | } |
---|
[9facf3b] | 925 | |
---|
| 926 | std::string genName( DeclarationWithType * decl ) { |
---|
| 927 | CodeGen::OperatorInfo opInfo; |
---|
| 928 | if ( operatorLookup( decl->get_name(), opInfo ) ) { |
---|
| 929 | return opInfo.outputName; |
---|
| 930 | } else { |
---|
| 931 | return decl->get_name(); |
---|
| 932 | } // if |
---|
| 933 | } |
---|
[51b7345] | 934 | } // namespace CodeGen |
---|
[51587aa] | 935 | |
---|
| 936 | // Local Variables: // |
---|
| 937 | // tab-width: 4 // |
---|
| 938 | // mode: c++ // |
---|
| 939 | // compile-command: "make install" // |
---|
| 940 | // End: // |
---|