[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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[44a81853] | 12 | // Last Modified On : Wed Jan 18 15:23:08 2017 |
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| 13 | // Update Count : 414 |
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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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[44a81853] | 113 | void CodeGenerator::genAttributes( list< Attribute * > & attributes ) { |
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| 114 | if ( attributes.empty() ) return; |
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| 115 | output << "__attribute__ (("; |
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| 116 | for ( list< Attribute * >::iterator attr( attributes.begin() );; ) { |
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| 117 | output << (*attr)->get_name(); |
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| 118 | if ( ! (*attr)->get_parameters().empty() ) { |
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| 119 | output << "("; |
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| 120 | genCommaList( (*attr)->get_parameters().begin(), (*attr)->get_parameters().end() ); |
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| 121 | output << ")"; |
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| 122 | } // if |
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| 123 | if ( ++attr == attributes.end() ) break; |
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| 124 | output << ","; // separator |
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| 125 | } // for |
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| 126 | output << ")) "; |
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| 127 | } // CodeGenerator::genAttributes |
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[7baed7d] | 128 | |
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| 129 | |
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| 130 | //*** Declarations |
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[8688ce1] | 131 | void CodeGenerator::visit( FunctionDecl * functionDecl ) { |
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[8e9cbb2] | 132 | extension( functionDecl ); |
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[7baed7d] | 133 | genAttributes( functionDecl->get_attributes() ); |
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| 134 | |
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[51587aa] | 135 | handleStorageClass( functionDecl ); |
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[f38c8d9] | 136 | if ( functionDecl->get_isInline() ) { |
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[6c4ff37] | 137 | output << "inline "; |
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[f38c8d9] | 138 | } // if |
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[de62360d] | 139 | if ( functionDecl->get_isNoreturn() ) { |
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| 140 | output << "_Noreturn "; |
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| 141 | } // if |
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[6c4ff37] | 142 | output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) ); |
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[51587aa] | 143 | |
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| 144 | // how to get this to the Functype? |
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| 145 | std::list< Declaration * > olds = functionDecl->get_oldDecls(); |
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| 146 | if ( ! olds.empty() ) { |
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[6c4ff37] | 147 | output << " /* function has old declaration */"; |
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[51587aa] | 148 | } // if |
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| 149 | |
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[58dd019] | 150 | asmName( functionDecl ); |
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| 151 | |
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[51587aa] | 152 | // acceptAll( functionDecl->get_oldDecls(), *this ); |
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| 153 | if ( functionDecl->get_statements() ) { |
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[7f5566b] | 154 | functionDecl->get_statements()->accept( *this ); |
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[51587aa] | 155 | } // if |
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| 156 | } |
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| 157 | |
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[8688ce1] | 158 | void CodeGenerator::visit( ObjectDecl * objectDecl ) { |
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[8e9cbb2] | 159 | extension( objectDecl ); |
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[f9cebb5] | 160 | genAttributes( objectDecl->get_attributes() ); |
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| 161 | |
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[51587aa] | 162 | handleStorageClass( objectDecl ); |
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[6c4ff37] | 163 | output << genType( objectDecl->get_type(), mangleName( objectDecl ) ); |
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[71f4e4f] | 164 | |
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[58dd019] | 165 | asmName( objectDecl ); |
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| 166 | |
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[51587aa] | 167 | if ( objectDecl->get_init() ) { |
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[6c4ff37] | 168 | output << " = "; |
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[51587aa] | 169 | objectDecl->get_init()->accept( *this ); |
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| 170 | } // if |
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[3778cb2] | 171 | |
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[51587aa] | 172 | if ( objectDecl->get_bitfieldWidth() ) { |
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[6c4ff37] | 173 | output << ":"; |
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[51587aa] | 174 | objectDecl->get_bitfieldWidth()->accept( *this ); |
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| 175 | } // if |
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| 176 | } |
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| 177 | |
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[8688ce1] | 178 | void CodeGenerator::handleAggregate( AggregateDecl * aggDecl ) { |
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[51587aa] | 179 | if ( aggDecl->get_name() != "" ) |
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[6c4ff37] | 180 | output << aggDecl->get_name(); |
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[71f4e4f] | 181 | |
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[2c57025] | 182 | // std::list< Declaration * > & memb = aggDecl->get_members(); |
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| 183 | // if ( ! memb.empty() ) { |
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| 184 | if ( aggDecl->has_body() ) { |
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| 185 | std::list< Declaration * > & memb = aggDecl->get_members(); |
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[94b4364] | 186 | output << " {" << endl; |
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[51587aa] | 187 | |
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[71f4e4f] | 188 | cur_indent += CodeGenerator::tabsize; |
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[3778cb2] | 189 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++ ) { |
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[71f4e4f] | 190 | output << indent; |
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[7f5566b] | 191 | (*i)->accept( *this ); |
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[6c4ff37] | 192 | output << ";" << endl; |
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[3778cb2] | 193 | } // for |
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[51587aa] | 194 | |
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[71f4e4f] | 195 | cur_indent -= CodeGenerator::tabsize; |
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[51587aa] | 196 | |
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[cda48b6] | 197 | output << indent << "}"; |
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[17cd4eb] | 198 | } // if |
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[51587aa] | 199 | } |
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[17cd4eb] | 200 | |
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[8688ce1] | 201 | void CodeGenerator::visit( StructDecl * structDecl ) { |
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[8e9cbb2] | 202 | extension( structDecl ); |
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[6c4ff37] | 203 | output << "struct "; |
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[51587aa] | 204 | handleAggregate( structDecl ); |
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| 205 | } |
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[17cd4eb] | 206 | |
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[8688ce1] | 207 | void CodeGenerator::visit( UnionDecl * unionDecl ) { |
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[8e9cbb2] | 208 | extension( unionDecl ); |
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[6c4ff37] | 209 | output << "union "; |
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[8e9cbb2] | 210 | handleAggregate( unionDecl ); |
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[51587aa] | 211 | } |
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[71f4e4f] | 212 | |
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[8688ce1] | 213 | void CodeGenerator::visit( EnumDecl * enumDecl ) { |
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[8e9cbb2] | 214 | extension( enumDecl ); |
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[6c4ff37] | 215 | output << "enum "; |
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[51587aa] | 216 | |
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[8e9cbb2] | 217 | if ( enumDecl->get_name() != "" ) |
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| 218 | output << enumDecl->get_name(); |
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[71f4e4f] | 219 | |
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[8e9cbb2] | 220 | std::list< Declaration* > &memb = enumDecl->get_members(); |
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[51587aa] | 221 | |
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| 222 | if ( ! memb.empty() ) { |
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[cda48b6] | 223 | output << " {" << endl; |
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[51587aa] | 224 | |
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[71f4e4f] | 225 | cur_indent += CodeGenerator::tabsize; |
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[51587aa] | 226 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) { |
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[8688ce1] | 227 | ObjectDecl * obj = dynamic_cast< ObjectDecl* >( *i ); |
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[51587aa] | 228 | assert( obj ); |
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[71f4e4f] | 229 | output << indent << mangleName( obj ); |
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[51587aa] | 230 | if ( obj->get_init() ) { |
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[6c4ff37] | 231 | output << " = "; |
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[7f5566b] | 232 | obj->get_init()->accept( *this ); |
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[51587aa] | 233 | } // if |
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[6c4ff37] | 234 | output << "," << endl; |
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[51587aa] | 235 | } // for |
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| 236 | |
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[71f4e4f] | 237 | cur_indent -= CodeGenerator::tabsize; |
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[51587aa] | 238 | |
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[cda48b6] | 239 | output << indent << "}"; |
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[51587aa] | 240 | } // if |
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| 241 | } |
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[71f4e4f] | 242 | |
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[8688ce1] | 243 | void CodeGenerator::visit( TraitDecl * traitDecl ) {} |
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[71f4e4f] | 244 | |
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[8688ce1] | 245 | void CodeGenerator::visit( TypedefDecl * typeDecl ) { |
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[8e9cbb2] | 246 | assert( false && "Typedefs are removed and substituted in earlier passes." ); |
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| 247 | //output << "typedef "; |
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| 248 | //output << genType( typeDecl->get_base(), typeDecl->get_name() ); |
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[51587aa] | 249 | } |
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[71f4e4f] | 250 | |
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[8688ce1] | 251 | void CodeGenerator::visit( TypeDecl * typeDecl ) { |
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[51587aa] | 252 | // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes, |
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| 253 | // still to be done |
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[8e9cbb2] | 254 | extension( typeDecl ); |
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[6c4ff37] | 255 | output << "extern unsigned long " << typeDecl->get_name(); |
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[51587aa] | 256 | if ( typeDecl->get_base() ) { |
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[6c4ff37] | 257 | output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )"; |
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[51587aa] | 258 | } // if |
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| 259 | } |
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| 260 | |
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[e45215c] | 261 | void CodeGenerator::printDesignators( std::list< Expression * > & designators ) { |
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| 262 | typedef std::list< Expression * > DesignatorList; |
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| 263 | if ( designators.size() == 0 ) return; |
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| 264 | for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) { |
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[8a4da06] | 265 | if ( dynamic_cast< NameExpr * >( *iter ) ) { |
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[f32c7f4] | 266 | // if expression is a name, then initializing aggregate member |
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| 267 | output << "."; |
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| 268 | (*iter)->accept( *this ); |
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| 269 | } else { |
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| 270 | // if not a simple name, it has to be a constant expression, i.e. an array designator |
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[e45215c] | 271 | output << "["; |
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| 272 | (*iter)->accept( *this ); |
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| 273 | output << "]"; |
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[3778cb2] | 274 | } // if |
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| 275 | } // for |
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[e45215c] | 276 | output << " = "; |
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| 277 | } |
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| 278 | |
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[8688ce1] | 279 | void CodeGenerator::visit( SingleInit * init ) { |
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[e45215c] | 280 | printDesignators( init->get_designators() ); |
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[51587aa] | 281 | init->get_value()->accept( *this ); |
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| 282 | } |
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| 283 | |
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[8688ce1] | 284 | void CodeGenerator::visit( ListInit * init ) { |
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[e45215c] | 285 | printDesignators( init->get_designators() ); |
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[6c4ff37] | 286 | output << "{ "; |
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[4d2434a] | 287 | if ( init->begin() == init->end() ) { |
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[8e9cbb2] | 288 | // illegal to leave initializer list empty for scalar initializers, but always legal to have 0 |
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[5b40f30] | 289 | output << "0"; |
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| 290 | } else { |
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[4d2434a] | 291 | genCommaList( init->begin(), init->end() ); |
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[8688ce1] | 292 | } // if |
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[6c4ff37] | 293 | output << " }"; |
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[51587aa] | 294 | } |
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| 295 | |
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[fc638d2] | 296 | void CodeGenerator::visit( ConstructorInit * init ){ |
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| 297 | assertf( false, "ConstructorInit nodes should not make it to CodeGen." ); |
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| 298 | } |
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| 299 | |
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[8688ce1] | 300 | void CodeGenerator::visit( Constant * constant ) { |
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[6c4ff37] | 301 | output << constant->get_value() ; |
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[51587aa] | 302 | } |
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| 303 | |
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| 304 | //*** Expressions |
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[8688ce1] | 305 | void CodeGenerator::visit( ApplicationExpr * applicationExpr ) { |
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[e04ef3a] | 306 | extension( applicationExpr ); |
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[8688ce1] | 307 | if ( VariableExpr * varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) { |
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[51587aa] | 308 | OperatorInfo opInfo; |
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| 309 | if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) { |
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| 310 | std::list< Expression* >::iterator arg = applicationExpr->get_args().begin(); |
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| 311 | switch ( opInfo.type ) { |
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| 312 | case OT_PREFIXASSIGN: |
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| 313 | case OT_POSTFIXASSIGN: |
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| 314 | case OT_INFIXASSIGN: |
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[356189a] | 315 | case OT_CTOR: |
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[c2ce2350] | 316 | case OT_DTOR: |
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[51587aa] | 317 | { |
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| 318 | assert( arg != applicationExpr->get_args().end() ); |
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[8688ce1] | 319 | if ( AddressExpr * addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) { |
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[356189a] | 320 | // remove & from first assignment/ctor argument |
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[51587aa] | 321 | *arg = addrExpr->get_arg(); |
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| 322 | } else { |
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[356189a] | 323 | // no address-of operator, so must be a pointer - add dereference |
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[066d77a] | 324 | // NOTE: if the assertion starts to trigger, check that the application expr isn't being shared. |
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| 325 | // Since its arguments are modified here, this assertion most commonly triggers when the application |
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| 326 | // is visited multiple times. |
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[8688ce1] | 327 | UntypedExpr * newExpr = new UntypedExpr( new NameExpr( "*?" ) ); |
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[51587aa] | 328 | newExpr->get_args().push_back( *arg ); |
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[906e24d] | 329 | Type * type = InitTweak::getPointerBase( (*arg)->get_result() ); |
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[066d77a] | 330 | assertf( type, "First argument to a derefence must be a pointer. Ensure that expressions are not being shared." ); |
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[906e24d] | 331 | newExpr->set_result( type->clone() ); |
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[51587aa] | 332 | *arg = newExpr; |
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| 333 | } // if |
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| 334 | break; |
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| 335 | } |
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[71f4e4f] | 336 | |
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[51587aa] | 337 | default: |
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| 338 | // do nothing |
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| 339 | ; |
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[3778cb2] | 340 | } // switch |
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[71f4e4f] | 341 | |
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[51587aa] | 342 | switch ( opInfo.type ) { |
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| 343 | case OT_INDEX: |
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| 344 | assert( applicationExpr->get_args().size() == 2 ); |
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| 345 | (*arg++)->accept( *this ); |
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[6c4ff37] | 346 | output << "["; |
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[51587aa] | 347 | (*arg)->accept( *this ); |
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[6c4ff37] | 348 | output << "]"; |
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[51587aa] | 349 | break; |
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[71f4e4f] | 350 | |
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[51587aa] | 351 | case OT_CALL: |
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[356189a] | 352 | // there are no intrinsic definitions of the function call operator |
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[51587aa] | 353 | assert( false ); |
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| 354 | break; |
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[71f4e4f] | 355 | |
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[f1e012b] | 356 | case OT_CTOR: |
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[c2ce2350] | 357 | case OT_DTOR: |
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[356189a] | 358 | if ( applicationExpr->get_args().size() == 1 ) { |
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[8e9cbb2] | 359 | // the expression fed into a single parameter constructor or destructor may contain side |
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| 360 | // effects, so must still output this expression |
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[64071c2] | 361 | output << "("; |
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[356189a] | 362 | (*arg++)->accept( *this ); |
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[64071c2] | 363 | output << ") /* " << opInfo.inputName << " */"; |
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[356189a] | 364 | } else if ( applicationExpr->get_args().size() == 2 ) { |
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[c2ce2350] | 365 | // intrinsic two parameter constructors are essentially bitwise assignment |
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[356189a] | 366 | output << "("; |
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| 367 | (*arg++)->accept( *this ); |
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| 368 | output << opInfo.symbol; |
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| 369 | (*arg)->accept( *this ); |
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[c2ce2350] | 370 | output << ") /* " << opInfo.inputName << " */"; |
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[356189a] | 371 | } else { |
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[c2ce2350] | 372 | // no constructors with 0 or more than 2 parameters |
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[356189a] | 373 | assert( false ); |
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[8688ce1] | 374 | } // if |
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[356189a] | 375 | break; |
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[f1e012b] | 376 | |
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[51587aa] | 377 | case OT_PREFIX: |
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| 378 | case OT_PREFIXASSIGN: |
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| 379 | assert( applicationExpr->get_args().size() == 1 ); |
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[6c4ff37] | 380 | output << "("; |
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| 381 | output << opInfo.symbol; |
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[51587aa] | 382 | (*arg)->accept( *this ); |
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[6c4ff37] | 383 | output << ")"; |
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[51587aa] | 384 | break; |
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[71f4e4f] | 385 | |
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[51587aa] | 386 | case OT_POSTFIX: |
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| 387 | case OT_POSTFIXASSIGN: |
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| 388 | assert( applicationExpr->get_args().size() == 1 ); |
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| 389 | (*arg)->accept( *this ); |
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[6c4ff37] | 390 | output << opInfo.symbol; |
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[51587aa] | 391 | break; |
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| 392 | |
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[f1e012b] | 393 | |
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[51587aa] | 394 | case OT_INFIX: |
---|
| 395 | case OT_INFIXASSIGN: |
---|
| 396 | assert( applicationExpr->get_args().size() == 2 ); |
---|
[6c4ff37] | 397 | output << "("; |
---|
[51587aa] | 398 | (*arg++)->accept( *this ); |
---|
[6c4ff37] | 399 | output << opInfo.symbol; |
---|
[51587aa] | 400 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 401 | output << ")"; |
---|
[51587aa] | 402 | break; |
---|
[71f4e4f] | 403 | |
---|
[51587aa] | 404 | case OT_CONSTANT: |
---|
[721f17a] | 405 | case OT_LABELADDRESS: |
---|
| 406 | // there are no intrinsic definitions of 0/1 or label addresses as functions |
---|
[51587aa] | 407 | assert( false ); |
---|
[3778cb2] | 408 | } // switch |
---|
[17cd4eb] | 409 | } else { |
---|
[51587aa] | 410 | varExpr->accept( *this ); |
---|
[6c4ff37] | 411 | output << "("; |
---|
[51587aa] | 412 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
---|
[6c4ff37] | 413 | output << ")"; |
---|
[17cd4eb] | 414 | } // if |
---|
[51587aa] | 415 | } else { |
---|
| 416 | applicationExpr->get_function()->accept( *this ); |
---|
[6c4ff37] | 417 | output << "("; |
---|
[51587aa] | 418 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
---|
[6c4ff37] | 419 | output << ")"; |
---|
[51587aa] | 420 | } // if |
---|
| 421 | } |
---|
[71f4e4f] | 422 | |
---|
[8688ce1] | 423 | void CodeGenerator::visit( UntypedExpr * untypedExpr ) { |
---|
[e04ef3a] | 424 | extension( untypedExpr ); |
---|
[8688ce1] | 425 | if ( NameExpr * nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) { |
---|
[51587aa] | 426 | OperatorInfo opInfo; |
---|
| 427 | if ( operatorLookup( nameExpr->get_name(), opInfo ) ) { |
---|
| 428 | std::list< Expression* >::iterator arg = untypedExpr->get_args().begin(); |
---|
| 429 | switch ( opInfo.type ) { |
---|
| 430 | case OT_INDEX: |
---|
| 431 | assert( untypedExpr->get_args().size() == 2 ); |
---|
| 432 | (*arg++)->accept( *this ); |
---|
[6c4ff37] | 433 | output << "["; |
---|
[51587aa] | 434 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 435 | output << "]"; |
---|
[51587aa] | 436 | break; |
---|
[71f4e4f] | 437 | |
---|
[51587aa] | 438 | case OT_CALL: |
---|
[f1e012b] | 439 | assert( false ); |
---|
| 440 | |
---|
[c2ce2350] | 441 | case OT_CTOR: |
---|
| 442 | case OT_DTOR: |
---|
| 443 | if ( untypedExpr->get_args().size() == 1 ) { |
---|
[8e9cbb2] | 444 | // the expression fed into a single parameter constructor or destructor may contain side |
---|
| 445 | // effects, so must still output this expression |
---|
[64071c2] | 446 | output << "("; |
---|
[c2ce2350] | 447 | (*arg++)->accept( *this ); |
---|
[64071c2] | 448 | output << ") /* " << opInfo.inputName << " */"; |
---|
[c2ce2350] | 449 | } else if ( untypedExpr->get_args().size() == 2 ) { |
---|
| 450 | // intrinsic two parameter constructors are essentially bitwise assignment |
---|
| 451 | output << "("; |
---|
| 452 | (*arg++)->accept( *this ); |
---|
| 453 | output << opInfo.symbol; |
---|
| 454 | (*arg)->accept( *this ); |
---|
| 455 | output << ") /* " << opInfo.inputName << " */"; |
---|
| 456 | } else { |
---|
| 457 | // no constructors with 0 or more than 2 parameters |
---|
| 458 | assert( false ); |
---|
[3778cb2] | 459 | } // if |
---|
[51587aa] | 460 | break; |
---|
[71f4e4f] | 461 | |
---|
[51587aa] | 462 | case OT_PREFIX: |
---|
| 463 | case OT_PREFIXASSIGN: |
---|
[de62360d] | 464 | case OT_LABELADDRESS: |
---|
[51587aa] | 465 | assert( untypedExpr->get_args().size() == 1 ); |
---|
[6c4ff37] | 466 | output << "("; |
---|
| 467 | output << opInfo.symbol; |
---|
[51587aa] | 468 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 469 | output << ")"; |
---|
[51587aa] | 470 | break; |
---|
[71f4e4f] | 471 | |
---|
[51587aa] | 472 | case OT_POSTFIX: |
---|
| 473 | case OT_POSTFIXASSIGN: |
---|
| 474 | assert( untypedExpr->get_args().size() == 1 ); |
---|
| 475 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 476 | output << opInfo.symbol; |
---|
[51587aa] | 477 | break; |
---|
[71f4e4f] | 478 | |
---|
[51587aa] | 479 | case OT_INFIX: |
---|
| 480 | case OT_INFIXASSIGN: |
---|
| 481 | assert( untypedExpr->get_args().size() == 2 ); |
---|
[6c4ff37] | 482 | output << "("; |
---|
[51587aa] | 483 | (*arg++)->accept( *this ); |
---|
[6c4ff37] | 484 | output << opInfo.symbol; |
---|
[51587aa] | 485 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 486 | output << ")"; |
---|
[51587aa] | 487 | break; |
---|
[71f4e4f] | 488 | |
---|
[51587aa] | 489 | case OT_CONSTANT: |
---|
| 490 | // there are no intrinsic definitions of 0 or 1 as functions |
---|
| 491 | assert( false ); |
---|
[3778cb2] | 492 | } // switch |
---|
[51587aa] | 493 | } else { |
---|
[8688ce1] | 494 | if ( nameExpr->get_name() == "..." ) { // case V1 ... V2 or case V1~V2 |
---|
[ac911f4] | 495 | assert( untypedExpr->get_args().size() == 2 ); |
---|
| 496 | (*untypedExpr->get_args().begin())->accept( *this ); |
---|
| 497 | output << " ... "; |
---|
| 498 | (*--untypedExpr->get_args().end())->accept( *this ); |
---|
[057b34f] | 499 | } else { // builtin routines |
---|
| 500 | nameExpr->accept( *this ); |
---|
| 501 | output << "("; |
---|
| 502 | genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() ); |
---|
| 503 | output << ")"; |
---|
[66d12f7] | 504 | } // if |
---|
[51587aa] | 505 | } // if |
---|
| 506 | } else { |
---|
| 507 | untypedExpr->get_function()->accept( *this ); |
---|
[6c4ff37] | 508 | output << "("; |
---|
[51587aa] | 509 | genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() ); |
---|
[6c4ff37] | 510 | output << ")"; |
---|
[51587aa] | 511 | } // if |
---|
| 512 | } |
---|
[71f4e4f] | 513 | |
---|
[064e3ff] | 514 | void CodeGenerator::visit( RangeExpr * rangeExpr ) { |
---|
| 515 | rangeExpr->get_low()->accept( *this ); |
---|
| 516 | output << " ... "; |
---|
| 517 | rangeExpr->get_high()->accept( *this ); |
---|
| 518 | } |
---|
| 519 | |
---|
[8688ce1] | 520 | void CodeGenerator::visit( NameExpr * nameExpr ) { |
---|
[e04ef3a] | 521 | extension( nameExpr ); |
---|
[51587aa] | 522 | OperatorInfo opInfo; |
---|
| 523 | if ( operatorLookup( nameExpr->get_name(), opInfo ) ) { |
---|
| 524 | assert( opInfo.type == OT_CONSTANT ); |
---|
[6c4ff37] | 525 | output << opInfo.symbol; |
---|
[51587aa] | 526 | } else { |
---|
[6c4ff37] | 527 | output << nameExpr->get_name(); |
---|
[51587aa] | 528 | } // if |
---|
| 529 | } |
---|
[71f4e4f] | 530 | |
---|
[8688ce1] | 531 | void CodeGenerator::visit( AddressExpr * addressExpr ) { |
---|
[e04ef3a] | 532 | extension( addressExpr ); |
---|
[6c4ff37] | 533 | output << "(&"; |
---|
[51587aa] | 534 | // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address |
---|
[8688ce1] | 535 | if ( VariableExpr * variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) { |
---|
[6c4ff37] | 536 | output << mangleName( variableExpr->get_var() ); |
---|
[51587aa] | 537 | } else { |
---|
| 538 | addressExpr->get_arg()->accept( *this ); |
---|
| 539 | } // if |
---|
[6c4ff37] | 540 | output << ")"; |
---|
[51587aa] | 541 | } |
---|
| 542 | |
---|
[8688ce1] | 543 | void CodeGenerator::visit( CastExpr * castExpr ) { |
---|
[e04ef3a] | 544 | extension( castExpr ); |
---|
[803deb1] | 545 | output << "("; |
---|
[906e24d] | 546 | if ( castExpr->get_result()->isVoid() ) { |
---|
[803deb1] | 547 | output << "(void)" ; |
---|
[906e24d] | 548 | } else if ( ! castExpr->get_result()->get_isLvalue() ) { |
---|
[803deb1] | 549 | // at least one result type of cast, but not an lvalue |
---|
| 550 | output << "("; |
---|
[906e24d] | 551 | output << genType( castExpr->get_result(), "" ); |
---|
[71f4e4f] | 552 | output << ")"; |
---|
[803deb1] | 553 | } else { |
---|
[8e9cbb2] | 554 | // otherwise, the cast is to an lvalue type, so the cast should be dropped, since the result of a cast is |
---|
[803deb1] | 555 | // never an lvalue in C |
---|
[3778cb2] | 556 | } // if |
---|
[803deb1] | 557 | castExpr->get_arg()->accept( *this ); |
---|
| 558 | output << ")"; |
---|
[51587aa] | 559 | } |
---|
[71f4e4f] | 560 | |
---|
[8688ce1] | 561 | void CodeGenerator::visit( UntypedMemberExpr * memberExpr ) { |
---|
[51587aa] | 562 | assert( false ); |
---|
| 563 | } |
---|
[71f4e4f] | 564 | |
---|
[8688ce1] | 565 | void CodeGenerator::visit( MemberExpr * memberExpr ) { |
---|
[e04ef3a] | 566 | extension( memberExpr ); |
---|
[51587aa] | 567 | memberExpr->get_aggregate()->accept( *this ); |
---|
[6c4ff37] | 568 | output << "." << mangleName( memberExpr->get_member() ); |
---|
[51587aa] | 569 | } |
---|
[71f4e4f] | 570 | |
---|
[8688ce1] | 571 | void CodeGenerator::visit( VariableExpr * variableExpr ) { |
---|
[e04ef3a] | 572 | extension( variableExpr ); |
---|
[51587aa] | 573 | OperatorInfo opInfo; |
---|
| 574 | if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) { |
---|
[6c4ff37] | 575 | output << opInfo.symbol; |
---|
[51587aa] | 576 | } else { |
---|
[6c4ff37] | 577 | output << mangleName( variableExpr->get_var() ); |
---|
[51587aa] | 578 | } // if |
---|
| 579 | } |
---|
[71f4e4f] | 580 | |
---|
[8688ce1] | 581 | void CodeGenerator::visit( ConstantExpr * constantExpr ) { |
---|
[51587aa] | 582 | assert( constantExpr->get_constant() ); |
---|
[e04ef3a] | 583 | extension( constantExpr ); |
---|
[51587aa] | 584 | constantExpr->get_constant()->accept( *this ); |
---|
| 585 | } |
---|
[71f4e4f] | 586 | |
---|
[8688ce1] | 587 | void CodeGenerator::visit( SizeofExpr * sizeofExpr ) { |
---|
[e04ef3a] | 588 | extension( sizeofExpr ); |
---|
[6c4ff37] | 589 | output << "sizeof("; |
---|
[51587aa] | 590 | if ( sizeofExpr->get_isType() ) { |
---|
[6c4ff37] | 591 | output << genType( sizeofExpr->get_type(), "" ); |
---|
[51587aa] | 592 | } else { |
---|
| 593 | sizeofExpr->get_expr()->accept( *this ); |
---|
| 594 | } // if |
---|
[6c4ff37] | 595 | output << ")"; |
---|
[51587aa] | 596 | } |
---|
[47534159] | 597 | |
---|
[8688ce1] | 598 | void CodeGenerator::visit( AlignofExpr * alignofExpr ) { |
---|
[47534159] | 599 | // use GCC extension to avoid bumping std to C11 |
---|
[8e9cbb2] | 600 | extension( alignofExpr ); |
---|
[47534159] | 601 | output << "__alignof__("; |
---|
[25a054f] | 602 | if ( alignofExpr->get_isType() ) { |
---|
| 603 | output << genType( alignofExpr->get_type(), "" ); |
---|
[47534159] | 604 | } else { |
---|
[25a054f] | 605 | alignofExpr->get_expr()->accept( *this ); |
---|
[47534159] | 606 | } // if |
---|
| 607 | output << ")"; |
---|
| 608 | } |
---|
[71f4e4f] | 609 | |
---|
[8688ce1] | 610 | void CodeGenerator::visit( UntypedOffsetofExpr * offsetofExpr ) { |
---|
[8e9cbb2] | 611 | assert( false && "UntypedOffsetofExpr should not reach code generation." ); |
---|
[2a4b088] | 612 | } |
---|
| 613 | |
---|
[8688ce1] | 614 | void CodeGenerator::visit( OffsetofExpr * offsetofExpr ) { |
---|
[25a054f] | 615 | // use GCC builtin |
---|
| 616 | output << "__builtin_offsetof("; |
---|
| 617 | output << genType( offsetofExpr->get_type(), "" ); |
---|
[e551c69] | 618 | output << ", " << mangleName( offsetofExpr->get_member() ); |
---|
[25a054f] | 619 | output << ")"; |
---|
| 620 | } |
---|
[d63eeb0] | 621 | |
---|
[8688ce1] | 622 | void CodeGenerator::visit( OffsetPackExpr * offsetPackExpr ) { |
---|
[8e9cbb2] | 623 | assert( false && "OffsetPackExpr should not reach code generation." ); |
---|
[afc1045] | 624 | } |
---|
[70a06f6] | 625 | |
---|
[8688ce1] | 626 | void CodeGenerator::visit( LogicalExpr * logicalExpr ) { |
---|
[e04ef3a] | 627 | extension( logicalExpr ); |
---|
[6c4ff37] | 628 | output << "("; |
---|
[51587aa] | 629 | logicalExpr->get_arg1()->accept( *this ); |
---|
| 630 | if ( logicalExpr->get_isAnd() ) { |
---|
[6c4ff37] | 631 | output << " && "; |
---|
[51587aa] | 632 | } else { |
---|
[6c4ff37] | 633 | output << " || "; |
---|
[51587aa] | 634 | } // if |
---|
| 635 | logicalExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 636 | output << ")"; |
---|
[51587aa] | 637 | } |
---|
[71f4e4f] | 638 | |
---|
[8688ce1] | 639 | void CodeGenerator::visit( ConditionalExpr * conditionalExpr ) { |
---|
[e04ef3a] | 640 | extension( conditionalExpr ); |
---|
[6c4ff37] | 641 | output << "("; |
---|
[51587aa] | 642 | conditionalExpr->get_arg1()->accept( *this ); |
---|
[6c4ff37] | 643 | output << " ? "; |
---|
[51587aa] | 644 | conditionalExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 645 | output << " : "; |
---|
[51587aa] | 646 | conditionalExpr->get_arg3()->accept( *this ); |
---|
[6c4ff37] | 647 | output << ")"; |
---|
[51587aa] | 648 | } |
---|
[71f4e4f] | 649 | |
---|
[8688ce1] | 650 | void CodeGenerator::visit( CommaExpr * commaExpr ) { |
---|
[e04ef3a] | 651 | extension( commaExpr ); |
---|
[6c4ff37] | 652 | output << "("; |
---|
[51587aa] | 653 | commaExpr->get_arg1()->accept( *this ); |
---|
[6c4ff37] | 654 | output << " , "; |
---|
[51587aa] | 655 | commaExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 656 | output << ")"; |
---|
[51587aa] | 657 | } |
---|
[71f4e4f] | 658 | |
---|
[907eccb] | 659 | void CodeGenerator::visit( UntypedTupleExpr * tupleExpr ) { assertf( false, "UntypedTupleExpr should not make it to Code Gen" ); } |
---|
| 660 | |
---|
| 661 | void CodeGenerator::visit( TupleExpr * tupleExpr ) { assertf( false, "TupleExpr should not make it to Code Gen" ); } |
---|
[71f4e4f] | 662 | |
---|
[8688ce1] | 663 | void CodeGenerator::visit( TypeExpr * typeExpr ) {} |
---|
[2b6c1e0] | 664 | |
---|
[8688ce1] | 665 | void CodeGenerator::visit( AsmExpr * asmExpr ) { |
---|
[7f5566b] | 666 | if ( asmExpr->get_inout() ) { |
---|
| 667 | output << "[ "; |
---|
| 668 | asmExpr->get_inout()->accept( *this ); |
---|
| 669 | output << " ] "; |
---|
| 670 | } // if |
---|
| 671 | asmExpr->get_constraint()->accept( *this ); |
---|
| 672 | output << " ( "; |
---|
| 673 | asmExpr->get_operand()->accept( *this ); |
---|
| 674 | output << " )"; |
---|
| 675 | } |
---|
| 676 | |
---|
[3c13c03] | 677 | void CodeGenerator::visit( CompoundLiteralExpr *compLitExpr ) { |
---|
| 678 | assert( compLitExpr->get_type() && dynamic_cast< ListInit * > ( compLitExpr->get_initializer() ) ); |
---|
| 679 | output << "(" << genType( compLitExpr->get_type(), "" ) << ")"; |
---|
| 680 | compLitExpr->get_initializer()->accept( *this ); |
---|
| 681 | } |
---|
| 682 | |
---|
[6eb8948] | 683 | void CodeGenerator::visit( StmtExpr * stmtExpr ) { |
---|
[3c13c03] | 684 | std::list< Statement * > & stmts = stmtExpr->get_statements()->get_kids(); |
---|
| 685 | output << "({" << std::endl; |
---|
| 686 | cur_indent += CodeGenerator::tabsize; |
---|
| 687 | unsigned int numStmts = stmts.size(); |
---|
| 688 | unsigned int i = 0; |
---|
| 689 | for ( Statement * stmt : stmts ) { |
---|
| 690 | output << indent << printLabels( stmt->get_labels() ); |
---|
| 691 | if ( i+1 == numStmts ) { |
---|
| 692 | // last statement in a statement expression needs to be handled specially - |
---|
| 693 | // cannot cast to void, otherwise the expression statement has no value |
---|
| 694 | if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( stmt ) ) { |
---|
| 695 | exprStmt->get_expr()->accept( *this ); |
---|
| 696 | output << ";" << endl; |
---|
| 697 | ++i; |
---|
| 698 | break; |
---|
| 699 | } |
---|
| 700 | } |
---|
| 701 | stmt->accept( *this ); |
---|
| 702 | output << endl; |
---|
| 703 | if ( wantSpacing( stmt ) ) { |
---|
| 704 | output << endl; |
---|
| 705 | } // if |
---|
| 706 | ++i; |
---|
| 707 | } |
---|
| 708 | cur_indent -= CodeGenerator::tabsize; |
---|
| 709 | output << indent << "})"; |
---|
[6eb8948] | 710 | } |
---|
| 711 | |
---|
[51587aa] | 712 | //*** Statements |
---|
[8688ce1] | 713 | void CodeGenerator::visit( CompoundStmt * compoundStmt ) { |
---|
[51587aa] | 714 | std::list<Statement*> ks = compoundStmt->get_kids(); |
---|
[2b6c1e0] | 715 | output << "{" << endl; |
---|
[51587aa] | 716 | |
---|
[2b6c1e0] | 717 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 718 | |
---|
[7f5566b] | 719 | for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) { |
---|
[cda48b6] | 720 | output << indent << printLabels( (*i)->get_labels() ); |
---|
[7f5566b] | 721 | (*i)->accept( *this ); |
---|
[2b6c1e0] | 722 | |
---|
[6c4ff37] | 723 | output << endl; |
---|
[2b6c1e0] | 724 | if ( wantSpacing( *i ) ) { |
---|
| 725 | output << endl; |
---|
[3778cb2] | 726 | } // if |
---|
[8688ce1] | 727 | } // for |
---|
[71f4e4f] | 728 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 729 | |
---|
[cda48b6] | 730 | output << indent << "}"; |
---|
[51587aa] | 731 | } |
---|
| 732 | |
---|
[8688ce1] | 733 | void CodeGenerator::visit( ExprStmt * exprStmt ) { |
---|
[6c4ff37] | 734 | assert( exprStmt ); |
---|
[321a2481] | 735 | // cast the top-level expression to void to reduce gcc warnings. |
---|
| 736 | Expression * expr = new CastExpr( exprStmt->get_expr() ); |
---|
| 737 | expr->accept( *this ); |
---|
| 738 | output << ";"; |
---|
[51587aa] | 739 | } |
---|
| 740 | |
---|
[8688ce1] | 741 | void CodeGenerator::visit( AsmStmt * asmStmt ) { |
---|
[7f5566b] | 742 | output << "asm "; |
---|
| 743 | if ( asmStmt->get_voltile() ) output << "volatile "; |
---|
| 744 | if ( ! asmStmt->get_gotolabels().empty() ) output << "goto "; |
---|
| 745 | output << "( "; |
---|
| 746 | if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this ); |
---|
| 747 | output << " : "; |
---|
| 748 | genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() ); |
---|
| 749 | output << " : "; |
---|
| 750 | genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() ); |
---|
| 751 | output << " : "; |
---|
| 752 | genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() ); |
---|
| 753 | if ( ! asmStmt->get_gotolabels().empty() ) { |
---|
| 754 | output << " : "; |
---|
| 755 | for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) { |
---|
| 756 | output << *begin++; |
---|
| 757 | if ( begin == asmStmt->get_gotolabels().end() ) break; |
---|
| 758 | output << ", "; |
---|
| 759 | } // for |
---|
| 760 | } // if |
---|
| 761 | output << " );" ; |
---|
| 762 | } |
---|
| 763 | |
---|
[8688ce1] | 764 | void CodeGenerator::visit( IfStmt * ifStmt ) { |
---|
[7f5566b] | 765 | output << "if ( "; |
---|
| 766 | ifStmt->get_condition()->accept( *this ); |
---|
| 767 | output << " ) "; |
---|
[51587aa] | 768 | |
---|
[7f5566b] | 769 | ifStmt->get_thenPart()->accept( *this ); |
---|
[51587aa] | 770 | |
---|
| 771 | if ( ifStmt->get_elsePart() != 0) { |
---|
[2b6c1e0] | 772 | output << " else "; |
---|
[7f5566b] | 773 | ifStmt->get_elsePart()->accept( *this ); |
---|
[51587aa] | 774 | } // if |
---|
| 775 | } |
---|
| 776 | |
---|
[8688ce1] | 777 | void CodeGenerator::visit( SwitchStmt * switchStmt ) { |
---|
[7f5566b] | 778 | output << "switch ( " ; |
---|
| 779 | switchStmt->get_condition()->accept( *this ); |
---|
| 780 | output << " ) "; |
---|
[71f4e4f] | 781 | |
---|
[2b6c1e0] | 782 | output << "{" << std::endl; |
---|
[6c4ff37] | 783 | cur_indent += CodeGenerator::tabsize; |
---|
[8688ce1] | 784 | acceptAll( switchStmt->get_statements(), *this ); |
---|
[6c4ff37] | 785 | cur_indent -= CodeGenerator::tabsize; |
---|
[cda48b6] | 786 | output << indent << "}"; |
---|
[51587aa] | 787 | } |
---|
| 788 | |
---|
[8688ce1] | 789 | void CodeGenerator::visit( CaseStmt * caseStmt ) { |
---|
[cda48b6] | 790 | output << indent; |
---|
[eb3261f] | 791 | if ( caseStmt->isDefault()) { |
---|
[2b6c1e0] | 792 | output << "default"; |
---|
[eb3261f] | 793 | } else { |
---|
[2b6c1e0] | 794 | output << "case "; |
---|
[7f5566b] | 795 | caseStmt->get_condition()->accept( *this ); |
---|
[17cd4eb] | 796 | } // if |
---|
[6c4ff37] | 797 | output << ":\n"; |
---|
[71f4e4f] | 798 | |
---|
[51587aa] | 799 | std::list<Statement *> sts = caseStmt->get_statements(); |
---|
| 800 | |
---|
[6c4ff37] | 801 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 802 | for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) { |
---|
[cda48b6] | 803 | output << indent << printLabels( (*i)->get_labels() ) ; |
---|
[7f5566b] | 804 | (*i)->accept( *this ); |
---|
[6c4ff37] | 805 | output << endl; |
---|
[3778cb2] | 806 | } // for |
---|
[6c4ff37] | 807 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 808 | } |
---|
| 809 | |
---|
[8688ce1] | 810 | void CodeGenerator::visit( BranchStmt * branchStmt ) { |
---|
[51587aa] | 811 | switch ( branchStmt->get_type()) { |
---|
| 812 | case BranchStmt::Goto: |
---|
| 813 | if ( ! branchStmt->get_target().empty() ) |
---|
[6c4ff37] | 814 | output << "goto " << branchStmt->get_target(); |
---|
[71f4e4f] | 815 | else { |
---|
[51587aa] | 816 | if ( branchStmt->get_computedTarget() != 0 ) { |
---|
[6c4ff37] | 817 | output << "goto *"; |
---|
[51587aa] | 818 | branchStmt->get_computedTarget()->accept( *this ); |
---|
| 819 | } // if |
---|
| 820 | } // if |
---|
| 821 | break; |
---|
| 822 | case BranchStmt::Break: |
---|
[6c4ff37] | 823 | output << "break"; |
---|
[51587aa] | 824 | break; |
---|
| 825 | case BranchStmt::Continue: |
---|
[6c4ff37] | 826 | output << "continue"; |
---|
[51587aa] | 827 | break; |
---|
[3778cb2] | 828 | } // switch |
---|
[2b6c1e0] | 829 | output << ";"; |
---|
[51587aa] | 830 | } |
---|
| 831 | |
---|
| 832 | |
---|
[8688ce1] | 833 | void CodeGenerator::visit( ReturnStmt * returnStmt ) { |
---|
[6c4ff37] | 834 | output << "return "; |
---|
[4b2589a] | 835 | maybeAccept( returnStmt->get_expr(), *this ); |
---|
[6c4ff37] | 836 | output << ";"; |
---|
[51587aa] | 837 | } |
---|
| 838 | |
---|
[8688ce1] | 839 | void CodeGenerator::visit( WhileStmt * whileStmt ) { |
---|
[321a2481] | 840 | if ( whileStmt->get_isDoWhile() ) { |
---|
[6c4ff37] | 841 | output << "do" ; |
---|
[321a2481] | 842 | } else { |
---|
[6c4ff37] | 843 | output << "while (" ; |
---|
[7f5566b] | 844 | whileStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 845 | output << ")"; |
---|
[51587aa] | 846 | } // if |
---|
[2b6c1e0] | 847 | output << " "; |
---|
[51587aa] | 848 | |
---|
[2b6c1e0] | 849 | output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() ); |
---|
[51587aa] | 850 | whileStmt->get_body()->accept( *this ); |
---|
| 851 | |
---|
[cda48b6] | 852 | output << indent; |
---|
[51587aa] | 853 | |
---|
| 854 | if ( whileStmt->get_isDoWhile() ) { |
---|
[6c4ff37] | 855 | output << " while (" ; |
---|
[7f5566b] | 856 | whileStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 857 | output << ");"; |
---|
[51587aa] | 858 | } // if |
---|
| 859 | } |
---|
| 860 | |
---|
[8688ce1] | 861 | void CodeGenerator::visit( ForStmt * forStmt ) { |
---|
[8e9cbb2] | 862 | // initialization is always hoisted, so don't bother doing anything with that |
---|
[145f1fc] | 863 | output << "for (;"; |
---|
[51587aa] | 864 | |
---|
[321a2481] | 865 | if ( forStmt->get_condition() != 0 ) { |
---|
[51587aa] | 866 | forStmt->get_condition()->accept( *this ); |
---|
[3778cb2] | 867 | } // if |
---|
[6c4ff37] | 868 | output << ";"; |
---|
[51587aa] | 869 | |
---|
[321a2481] | 870 | if ( forStmt->get_increment() != 0 ) { |
---|
| 871 | // cast the top-level expression to void to reduce gcc warnings. |
---|
| 872 | Expression * expr = new CastExpr( forStmt->get_increment() ); |
---|
| 873 | expr->accept( *this ); |
---|
[3778cb2] | 874 | } // if |
---|
[2b6c1e0] | 875 | output << ") "; |
---|
[51587aa] | 876 | |
---|
| 877 | if ( forStmt->get_body() != 0 ) { |
---|
[2b6c1e0] | 878 | output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() ); |
---|
[51587aa] | 879 | forStmt->get_body()->accept( *this ); |
---|
| 880 | } // if |
---|
| 881 | } |
---|
| 882 | |
---|
[8688ce1] | 883 | void CodeGenerator::visit( NullStmt * nullStmt ) { |
---|
[cda48b6] | 884 | //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() ); |
---|
[6c4ff37] | 885 | output << "/* null statement */ ;"; |
---|
[51587aa] | 886 | } |
---|
| 887 | |
---|
[8688ce1] | 888 | void CodeGenerator::visit( DeclStmt * declStmt ) { |
---|
[51587aa] | 889 | declStmt->get_decl()->accept( *this ); |
---|
[71f4e4f] | 890 | |
---|
[51587aa] | 891 | if ( doSemicolon( declStmt->get_decl() ) ) { |
---|
[6c4ff37] | 892 | output << ";"; |
---|
[51587aa] | 893 | } // if |
---|
| 894 | } |
---|
| 895 | |
---|
[8688ce1] | 896 | void CodeGenerator::handleStorageClass( Declaration * decl ) { |
---|
[51587aa] | 897 | switch ( decl->get_storageClass() ) { |
---|
[68cd1ce] | 898 | case DeclarationNode::Extern: |
---|
[6c4ff37] | 899 | output << "extern "; |
---|
[51587aa] | 900 | break; |
---|
[68cd1ce] | 901 | case DeclarationNode::Static: |
---|
[6c4ff37] | 902 | output << "static "; |
---|
[51587aa] | 903 | break; |
---|
[68cd1ce] | 904 | case DeclarationNode::Auto: |
---|
[51587aa] | 905 | // silently drop storage class |
---|
| 906 | break; |
---|
[68cd1ce] | 907 | case DeclarationNode::Register: |
---|
[6c4ff37] | 908 | output << "register "; |
---|
[51587aa] | 909 | break; |
---|
[68cd1ce] | 910 | case DeclarationNode::Inline: |
---|
[de62360d] | 911 | output << "inline "; |
---|
[f38c8d9] | 912 | break; |
---|
[68cd1ce] | 913 | case DeclarationNode::Fortran: |
---|
| 914 | output << "fortran "; |
---|
| 915 | break; |
---|
| 916 | case DeclarationNode::Noreturn: |
---|
| 917 | output << "_Noreturn "; |
---|
| 918 | break; |
---|
| 919 | case DeclarationNode::Threadlocal: |
---|
| 920 | output << "_Thread_local "; |
---|
| 921 | break; |
---|
| 922 | case DeclarationNode::NoStorageClass: |
---|
[f38c8d9] | 923 | break; |
---|
[843054c2] | 924 | } // switch |
---|
[51587aa] | 925 | } |
---|
[9facf3b] | 926 | |
---|
| 927 | std::string genName( DeclarationWithType * decl ) { |
---|
| 928 | CodeGen::OperatorInfo opInfo; |
---|
| 929 | if ( operatorLookup( decl->get_name(), opInfo ) ) { |
---|
| 930 | return opInfo.outputName; |
---|
| 931 | } else { |
---|
| 932 | return decl->get_name(); |
---|
| 933 | } // if |
---|
| 934 | } |
---|
[51b7345] | 935 | } // namespace CodeGen |
---|
[51587aa] | 936 | |
---|
| 937 | // Local Variables: // |
---|
| 938 | // tab-width: 4 // |
---|
| 939 | // mode: c++ // |
---|
| 940 | // compile-command: "make install" // |
---|
| 941 | // End: // |
---|