[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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[145f1fc] | 11 | // Last Modified By : Rob Schluntz |
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[f1e012b] | 12 | // Last Modified On : Tue Jan 19 13:15:44 2016 |
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| 13 | // Update Count : 251 |
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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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[51b7345] | 23 | #include "SynTree/Type.h" |
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| 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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[51b7345] | 27 | |
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| 28 | #include "utility.h" |
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| 29 | #include "UnimplementedError.h" |
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| 30 | |
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[a61fea9a] | 31 | #include "CodeGenerator.h" |
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[51b7345] | 32 | #include "OperatorTable.h" |
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| 33 | #include "GenType.h" |
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| 34 | |
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| 35 | using namespace std; |
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| 36 | |
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| 37 | namespace CodeGen { |
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[6c4ff37] | 38 | int CodeGenerator::tabsize = 4; |
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[51587aa] | 39 | |
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[145f1fc] | 40 | // the kinds of statements that would ideally be followed by whitespace |
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[2b6c1e0] | 41 | bool wantSpacing( Statement * stmt) { |
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| 42 | return dynamic_cast< IfStmt * >( stmt ) || dynamic_cast< CompoundStmt * >( stmt ) || |
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| 43 | dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * > ( stmt ) || dynamic_cast< SwitchStmt *>( stmt ); |
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| 44 | } |
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| 45 | |
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[cda48b6] | 46 | ostream & CodeGenerator::Indenter::operator()( ostream & output ) { |
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| 47 | return output << string( cg.cur_indent, ' ' ); |
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| 48 | } |
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| 49 | |
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| 50 | ostream & operator<<( ostream & output, CodeGenerator::Indenter &indent ) { |
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| 51 | return indent( output ); |
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| 52 | } |
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[51587aa] | 53 | |
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[7f5566b] | 54 | CodeGenerator::CodeGenerator( std::ostream &os ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ) { } |
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[cda48b6] | 55 | |
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| 56 | CodeGenerator::CodeGenerator( std::ostream &os, std::string init, int indentation, bool infunp ) |
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[7f5566b] | 57 | : indent( *this), cur_indent( indentation ), insideFunction( infunp ), output( os ) { |
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[6c4ff37] | 58 | //output << std::string( init ); |
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[51587aa] | 59 | } |
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| 60 | |
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[cda48b6] | 61 | CodeGenerator::CodeGenerator( std::ostream &os, char *init, int indentation, bool infunp ) |
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[7f5566b] | 62 | : indent( *this ), cur_indent( indentation ), insideFunction( infunp ), output( os ) { |
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[6c4ff37] | 63 | //output << std::string( init ); |
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[51587aa] | 64 | } |
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| 65 | |
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| 66 | string mangleName( DeclarationWithType *decl ) { |
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| 67 | if ( decl->get_mangleName() != "" ) { |
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| 68 | return decl->get_mangleName(); |
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| 69 | } else { |
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| 70 | return decl->get_name(); |
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| 71 | } // if |
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| 72 | } |
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[94b4364] | 73 | |
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[51587aa] | 74 | //*** Declarations |
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[6c4ff37] | 75 | void CodeGenerator::visit( FunctionDecl *functionDecl ) { |
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[51587aa] | 76 | handleStorageClass( functionDecl ); |
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[f38c8d9] | 77 | if ( functionDecl->get_isInline() ) { |
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[6c4ff37] | 78 | output << "inline "; |
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[f38c8d9] | 79 | } // if |
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[de62360d] | 80 | if ( functionDecl->get_isNoreturn() ) { |
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| 81 | output << "_Noreturn "; |
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| 82 | } // if |
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[6c4ff37] | 83 | output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) ); |
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[51587aa] | 84 | |
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| 85 | // how to get this to the Functype? |
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| 86 | std::list< Declaration * > olds = functionDecl->get_oldDecls(); |
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| 87 | if ( ! olds.empty() ) { |
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[6c4ff37] | 88 | output << " /* function has old declaration */"; |
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[51587aa] | 89 | } // if |
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| 90 | |
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| 91 | // acceptAll( functionDecl->get_oldDecls(), *this ); |
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| 92 | if ( functionDecl->get_statements() ) { |
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[7f5566b] | 93 | functionDecl->get_statements()->accept( *this ); |
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[51587aa] | 94 | } // if |
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| 95 | } |
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| 96 | |
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[6c4ff37] | 97 | void CodeGenerator::visit( ObjectDecl *objectDecl ) { |
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[51587aa] | 98 | handleStorageClass( objectDecl ); |
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[6c4ff37] | 99 | output << genType( objectDecl->get_type(), mangleName( objectDecl ) ); |
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[71f4e4f] | 100 | |
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[51587aa] | 101 | if ( objectDecl->get_init() ) { |
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[6c4ff37] | 102 | output << " = "; |
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[51587aa] | 103 | objectDecl->get_init()->accept( *this ); |
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| 104 | } // if |
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| 105 | if ( objectDecl->get_bitfieldWidth() ) { |
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[6c4ff37] | 106 | output << ":"; |
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[51587aa] | 107 | objectDecl->get_bitfieldWidth()->accept( *this ); |
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| 108 | } // if |
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| 109 | } |
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| 110 | |
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[6c4ff37] | 111 | void CodeGenerator::handleAggregate( AggregateDecl *aggDecl ) { |
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[51587aa] | 112 | if ( aggDecl->get_name() != "" ) |
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[6c4ff37] | 113 | output << aggDecl->get_name(); |
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[71f4e4f] | 114 | |
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[51587aa] | 115 | std::list< Declaration * > &memb = aggDecl->get_members(); |
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| 116 | |
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| 117 | if ( ! memb.empty() ) { |
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[94b4364] | 118 | output << " {" << endl; |
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[51587aa] | 119 | |
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[71f4e4f] | 120 | cur_indent += CodeGenerator::tabsize; |
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[51587aa] | 121 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) { |
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[71f4e4f] | 122 | output << indent; |
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[7f5566b] | 123 | (*i)->accept( *this ); |
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[6c4ff37] | 124 | output << ";" << endl; |
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[51587aa] | 125 | } |
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| 126 | |
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[71f4e4f] | 127 | cur_indent -= CodeGenerator::tabsize; |
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[51587aa] | 128 | |
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[cda48b6] | 129 | output << indent << "}"; |
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[17cd4eb] | 130 | } // if |
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[51587aa] | 131 | } |
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[17cd4eb] | 132 | |
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[6c4ff37] | 133 | void CodeGenerator::visit( StructDecl *structDecl ) { |
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| 134 | output << "struct "; |
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[51587aa] | 135 | handleAggregate( structDecl ); |
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| 136 | } |
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[17cd4eb] | 137 | |
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[6c4ff37] | 138 | void CodeGenerator::visit( UnionDecl *aggregateDecl ) { |
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| 139 | output << "union "; |
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[51587aa] | 140 | handleAggregate( aggregateDecl ); |
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| 141 | } |
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[71f4e4f] | 142 | |
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[6c4ff37] | 143 | void CodeGenerator::visit( EnumDecl *aggDecl ) { |
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| 144 | output << "enum "; |
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[51587aa] | 145 | |
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| 146 | if ( aggDecl->get_name() != "" ) |
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[6c4ff37] | 147 | output << aggDecl->get_name(); |
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[71f4e4f] | 148 | |
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[51587aa] | 149 | std::list< Declaration* > &memb = aggDecl->get_members(); |
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| 150 | |
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| 151 | if ( ! memb.empty() ) { |
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[cda48b6] | 152 | output << " {" << endl; |
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[51587aa] | 153 | |
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[71f4e4f] | 154 | cur_indent += CodeGenerator::tabsize; |
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[51587aa] | 155 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) { |
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| 156 | ObjectDecl *obj = dynamic_cast< ObjectDecl* >( *i ); |
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| 157 | assert( obj ); |
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[71f4e4f] | 158 | output << indent << mangleName( obj ); |
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[51587aa] | 159 | if ( obj->get_init() ) { |
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[6c4ff37] | 160 | output << " = "; |
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[7f5566b] | 161 | obj->get_init()->accept( *this ); |
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[51587aa] | 162 | } // if |
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[6c4ff37] | 163 | output << "," << endl; |
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[51587aa] | 164 | } // for |
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| 165 | |
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[71f4e4f] | 166 | cur_indent -= CodeGenerator::tabsize; |
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[51587aa] | 167 | |
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[cda48b6] | 168 | output << indent << "}"; |
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[51587aa] | 169 | } // if |
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| 170 | } |
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[71f4e4f] | 171 | |
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[6c4ff37] | 172 | void CodeGenerator::visit( ContextDecl *aggregateDecl ) {} |
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[71f4e4f] | 173 | |
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[6c4ff37] | 174 | void CodeGenerator::visit( TypedefDecl *typeDecl ) { |
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| 175 | output << "typedef "; |
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| 176 | output << genType( typeDecl->get_base(), typeDecl->get_name() ); |
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[51587aa] | 177 | } |
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[71f4e4f] | 178 | |
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[6c4ff37] | 179 | void CodeGenerator::visit( TypeDecl *typeDecl ) { |
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[51587aa] | 180 | // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes, |
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| 181 | // still to be done |
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[6c4ff37] | 182 | output << "extern unsigned long " << typeDecl->get_name(); |
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[51587aa] | 183 | if ( typeDecl->get_base() ) { |
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[6c4ff37] | 184 | output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )"; |
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[51587aa] | 185 | } // if |
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| 186 | } |
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| 187 | |
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[e45215c] | 188 | void CodeGenerator::printDesignators( std::list< Expression * > & designators ) { |
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| 189 | typedef std::list< Expression * > DesignatorList; |
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| 190 | if ( designators.size() == 0 ) return; |
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| 191 | for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) { |
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[8a4da06] | 192 | if ( dynamic_cast< NameExpr * >( *iter ) ) { |
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[f32c7f4] | 193 | // if expression is a name, then initializing aggregate member |
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| 194 | output << "."; |
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| 195 | (*iter)->accept( *this ); |
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| 196 | } else { |
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| 197 | // if not a simple name, it has to be a constant expression, i.e. an array designator |
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[e45215c] | 198 | output << "["; |
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| 199 | (*iter)->accept( *this ); |
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| 200 | output << "]"; |
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| 201 | } |
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| 202 | } |
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| 203 | output << " = "; |
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| 204 | } |
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| 205 | |
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[6c4ff37] | 206 | void CodeGenerator::visit( SingleInit *init ) { |
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[e45215c] | 207 | printDesignators( init->get_designators() ); |
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[51587aa] | 208 | init->get_value()->accept( *this ); |
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| 209 | } |
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| 210 | |
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[6c4ff37] | 211 | void CodeGenerator::visit( ListInit *init ) { |
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[e45215c] | 212 | printDesignators( init->get_designators() ); |
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[6c4ff37] | 213 | output << "{ "; |
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[51587aa] | 214 | genCommaList( init->begin_initializers(), init->end_initializers() ); |
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[6c4ff37] | 215 | output << " }"; |
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[51587aa] | 216 | } |
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| 217 | |
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[71f4e4f] | 218 | void CodeGenerator::visit( Constant *constant ) { |
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[6c4ff37] | 219 | output << constant->get_value() ; |
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[51587aa] | 220 | } |
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| 221 | |
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| 222 | //*** Expressions |
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[6c4ff37] | 223 | void CodeGenerator::visit( ApplicationExpr *applicationExpr ) { |
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[51587aa] | 224 | if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) { |
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| 225 | OperatorInfo opInfo; |
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| 226 | if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) { |
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| 227 | std::list< Expression* >::iterator arg = applicationExpr->get_args().begin(); |
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| 228 | switch ( opInfo.type ) { |
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| 229 | case OT_PREFIXASSIGN: |
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| 230 | case OT_POSTFIXASSIGN: |
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| 231 | case OT_INFIXASSIGN: |
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| 232 | { |
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| 233 | assert( arg != applicationExpr->get_args().end() ); |
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| 234 | if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) { |
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[71f4e4f] | 235 | |
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[51587aa] | 236 | *arg = addrExpr->get_arg(); |
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| 237 | } else { |
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| 238 | UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) ); |
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| 239 | newExpr->get_args().push_back( *arg ); |
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| 240 | *arg = newExpr; |
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| 241 | } // if |
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| 242 | break; |
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| 243 | } |
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[71f4e4f] | 244 | |
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[51587aa] | 245 | default: |
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| 246 | // do nothing |
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| 247 | ; |
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| 248 | } |
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[71f4e4f] | 249 | |
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[51587aa] | 250 | switch ( opInfo.type ) { |
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| 251 | case OT_INDEX: |
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| 252 | assert( applicationExpr->get_args().size() == 2 ); |
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| 253 | (*arg++)->accept( *this ); |
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[6c4ff37] | 254 | output << "["; |
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[51587aa] | 255 | (*arg)->accept( *this ); |
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[6c4ff37] | 256 | output << "]"; |
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[51587aa] | 257 | break; |
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[71f4e4f] | 258 | |
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[51587aa] | 259 | case OT_CALL: |
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[2794fff] | 260 | // there are no intrinsic definitions of the function call operator or constructors or destructors |
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[51587aa] | 261 | assert( false ); |
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| 262 | break; |
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[71f4e4f] | 263 | |
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[f1e012b] | 264 | case OT_CTOR: |
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| 265 | // intrinsic constructors should never be called directly - they should be transformed back into Initializer nodes |
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| 266 | assert(false); |
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| 267 | break; |
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| 268 | |
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| 269 | case OT_DTOR: |
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| 270 | // intrinsic destructors do nothing - don't generate any code |
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| 271 | output << " // " << dynamic_cast<VariableExpr*>(applicationExpr->get_function())->get_var()->get_name() << endl; |
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| 272 | break; |
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| 273 | |
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[51587aa] | 274 | case OT_PREFIX: |
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| 275 | case OT_PREFIXASSIGN: |
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| 276 | assert( applicationExpr->get_args().size() == 1 ); |
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[6c4ff37] | 277 | output << "("; |
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| 278 | output << opInfo.symbol; |
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[51587aa] | 279 | (*arg)->accept( *this ); |
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[6c4ff37] | 280 | output << ")"; |
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[51587aa] | 281 | break; |
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[71f4e4f] | 282 | |
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[51587aa] | 283 | case OT_POSTFIX: |
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| 284 | case OT_POSTFIXASSIGN: |
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| 285 | assert( applicationExpr->get_args().size() == 1 ); |
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| 286 | (*arg)->accept( *this ); |
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[6c4ff37] | 287 | output << opInfo.symbol; |
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[51587aa] | 288 | break; |
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| 289 | |
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[f1e012b] | 290 | |
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[51587aa] | 291 | case OT_INFIX: |
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| 292 | case OT_INFIXASSIGN: |
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| 293 | assert( applicationExpr->get_args().size() == 2 ); |
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[6c4ff37] | 294 | output << "("; |
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[51587aa] | 295 | (*arg++)->accept( *this ); |
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[6c4ff37] | 296 | output << opInfo.symbol; |
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[51587aa] | 297 | (*arg)->accept( *this ); |
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[6c4ff37] | 298 | output << ")"; |
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[51587aa] | 299 | break; |
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[71f4e4f] | 300 | |
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[51587aa] | 301 | case OT_CONSTANT: |
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[721f17a] | 302 | case OT_LABELADDRESS: |
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| 303 | // there are no intrinsic definitions of 0/1 or label addresses as functions |
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[51587aa] | 304 | assert( false ); |
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| 305 | } |
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[17cd4eb] | 306 | } else { |
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[51587aa] | 307 | varExpr->accept( *this ); |
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[6c4ff37] | 308 | output << "("; |
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[51587aa] | 309 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
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[6c4ff37] | 310 | output << ")"; |
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[17cd4eb] | 311 | } // if |
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[51587aa] | 312 | } else { |
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| 313 | applicationExpr->get_function()->accept( *this ); |
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[6c4ff37] | 314 | output << "("; |
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[51587aa] | 315 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
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[6c4ff37] | 316 | output << ")"; |
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[51587aa] | 317 | } // if |
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| 318 | } |
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[71f4e4f] | 319 | |
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[6c4ff37] | 320 | void CodeGenerator::visit( UntypedExpr *untypedExpr ) { |
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[51587aa] | 321 | if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) { |
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| 322 | OperatorInfo opInfo; |
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| 323 | if ( operatorLookup( nameExpr->get_name(), opInfo ) ) { |
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| 324 | std::list< Expression* >::iterator arg = untypedExpr->get_args().begin(); |
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| 325 | switch ( opInfo.type ) { |
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| 326 | case OT_INDEX: |
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| 327 | assert( untypedExpr->get_args().size() == 2 ); |
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| 328 | (*arg++)->accept( *this ); |
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[6c4ff37] | 329 | output << "["; |
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[51587aa] | 330 | (*arg)->accept( *this ); |
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[6c4ff37] | 331 | output << "]"; |
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[51587aa] | 332 | break; |
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[71f4e4f] | 333 | |
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[51587aa] | 334 | case OT_CALL: |
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[f1e012b] | 335 | assert( false ); |
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| 336 | |
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[1840193] | 337 | case OT_CTOR: |
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| 338 | case OT_DTOR: |
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[f1e012b] | 339 | // intrinsic constructors should never be called |
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| 340 | // intrinsic destructors do nothing |
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[51587aa] | 341 | break; |
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[71f4e4f] | 342 | |
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[51587aa] | 343 | case OT_PREFIX: |
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| 344 | case OT_PREFIXASSIGN: |
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[de62360d] | 345 | case OT_LABELADDRESS: |
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[51587aa] | 346 | assert( untypedExpr->get_args().size() == 1 ); |
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[6c4ff37] | 347 | output << "("; |
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| 348 | output << opInfo.symbol; |
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[51587aa] | 349 | (*arg)->accept( *this ); |
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[6c4ff37] | 350 | output << ")"; |
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[51587aa] | 351 | break; |
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[71f4e4f] | 352 | |
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[51587aa] | 353 | case OT_POSTFIX: |
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| 354 | case OT_POSTFIXASSIGN: |
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| 355 | assert( untypedExpr->get_args().size() == 1 ); |
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| 356 | (*arg)->accept( *this ); |
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[6c4ff37] | 357 | output << opInfo.symbol; |
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[51587aa] | 358 | break; |
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[71f4e4f] | 359 | |
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[51587aa] | 360 | case OT_INFIX: |
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| 361 | case OT_INFIXASSIGN: |
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| 362 | assert( untypedExpr->get_args().size() == 2 ); |
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[6c4ff37] | 363 | output << "("; |
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[51587aa] | 364 | (*arg++)->accept( *this ); |
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[6c4ff37] | 365 | output << opInfo.symbol; |
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[51587aa] | 366 | (*arg)->accept( *this ); |
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[6c4ff37] | 367 | output << ")"; |
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[51587aa] | 368 | break; |
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[71f4e4f] | 369 | |
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[51587aa] | 370 | case OT_CONSTANT: |
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| 371 | // there are no intrinsic definitions of 0 or 1 as functions |
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| 372 | assert( false ); |
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| 373 | } |
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| 374 | } else { |
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| 375 | nameExpr->accept( *this ); |
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[6c4ff37] | 376 | output << "("; |
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[51587aa] | 377 | genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() ); |
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[6c4ff37] | 378 | output << ")"; |
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[51587aa] | 379 | } // if |
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| 380 | } else { |
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| 381 | untypedExpr->get_function()->accept( *this ); |
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[6c4ff37] | 382 | output << "("; |
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[51587aa] | 383 | genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() ); |
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[6c4ff37] | 384 | output << ")"; |
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[51587aa] | 385 | } // if |
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| 386 | } |
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[71f4e4f] | 387 | |
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[6c4ff37] | 388 | void CodeGenerator::visit( NameExpr *nameExpr ) { |
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[51587aa] | 389 | OperatorInfo opInfo; |
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| 390 | if ( operatorLookup( nameExpr->get_name(), opInfo ) ) { |
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| 391 | assert( opInfo.type == OT_CONSTANT ); |
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[6c4ff37] | 392 | output << opInfo.symbol; |
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[51587aa] | 393 | } else { |
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[6c4ff37] | 394 | output << nameExpr->get_name(); |
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[51587aa] | 395 | } // if |
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| 396 | } |
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[71f4e4f] | 397 | |
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[6c4ff37] | 398 | void CodeGenerator::visit( AddressExpr *addressExpr ) { |
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| 399 | output << "(&"; |
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[51587aa] | 400 | // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address |
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| 401 | if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) { |
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[6c4ff37] | 402 | output << mangleName( variableExpr->get_var() ); |
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[51587aa] | 403 | } else { |
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| 404 | addressExpr->get_arg()->accept( *this ); |
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| 405 | } // if |
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[6c4ff37] | 406 | output << ")"; |
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[51587aa] | 407 | } |
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| 408 | |
---|
[6c4ff37] | 409 | void CodeGenerator::visit( CastExpr *castExpr ) { |
---|
[76b48f1] | 410 | // if the cast is to an lvalue type, then the cast |
---|
| 411 | // should be dropped, since the result of a cast is |
---|
| 412 | // never an lvalue in C |
---|
| 413 | if ( castExpr->get_results().front()->get_isLvalue() ) { |
---|
| 414 | castExpr->get_arg()->accept( *this ); |
---|
[51587aa] | 415 | } else { |
---|
[76b48f1] | 416 | output << "(("; |
---|
| 417 | if ( castExpr->get_results().empty() ) { |
---|
| 418 | output << "void" ; |
---|
| 419 | } else { |
---|
| 420 | output << genType( castExpr->get_results().front(), "" ); |
---|
| 421 | } // if |
---|
| 422 | output << ")"; |
---|
| 423 | castExpr->get_arg()->accept( *this ); |
---|
[71f4e4f] | 424 | output << ")"; |
---|
[76b48f1] | 425 | } |
---|
[51587aa] | 426 | } |
---|
[71f4e4f] | 427 | |
---|
[6c4ff37] | 428 | void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) { |
---|
[51587aa] | 429 | assert( false ); |
---|
| 430 | } |
---|
[71f4e4f] | 431 | |
---|
[6c4ff37] | 432 | void CodeGenerator::visit( MemberExpr *memberExpr ) { |
---|
[51587aa] | 433 | memberExpr->get_aggregate()->accept( *this ); |
---|
[6c4ff37] | 434 | output << "." << mangleName( memberExpr->get_member() ); |
---|
[51587aa] | 435 | } |
---|
[71f4e4f] | 436 | |
---|
[6c4ff37] | 437 | void CodeGenerator::visit( VariableExpr *variableExpr ) { |
---|
[51587aa] | 438 | OperatorInfo opInfo; |
---|
| 439 | if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) { |
---|
[6c4ff37] | 440 | output << opInfo.symbol; |
---|
[51587aa] | 441 | } else { |
---|
[6c4ff37] | 442 | output << mangleName( variableExpr->get_var() ); |
---|
[51587aa] | 443 | } // if |
---|
| 444 | } |
---|
[71f4e4f] | 445 | |
---|
[6c4ff37] | 446 | void CodeGenerator::visit( ConstantExpr *constantExpr ) { |
---|
[51587aa] | 447 | assert( constantExpr->get_constant() ); |
---|
| 448 | constantExpr->get_constant()->accept( *this ); |
---|
| 449 | } |
---|
[71f4e4f] | 450 | |
---|
[6c4ff37] | 451 | void CodeGenerator::visit( SizeofExpr *sizeofExpr ) { |
---|
| 452 | output << "sizeof("; |
---|
[51587aa] | 453 | if ( sizeofExpr->get_isType() ) { |
---|
[6c4ff37] | 454 | output << genType( sizeofExpr->get_type(), "" ); |
---|
[51587aa] | 455 | } else { |
---|
| 456 | sizeofExpr->get_expr()->accept( *this ); |
---|
| 457 | } // if |
---|
[6c4ff37] | 458 | output << ")"; |
---|
[51587aa] | 459 | } |
---|
[47534159] | 460 | |
---|
| 461 | void CodeGenerator::visit( AlignofExpr *sizeofExpr ) { |
---|
| 462 | // use GCC extension to avoid bumping std to C11 |
---|
| 463 | output << "__alignof__("; |
---|
| 464 | if ( sizeofExpr->get_isType() ) { |
---|
| 465 | output << genType( sizeofExpr->get_type(), "" ); |
---|
| 466 | } else { |
---|
| 467 | sizeofExpr->get_expr()->accept( *this ); |
---|
| 468 | } // if |
---|
| 469 | output << ")"; |
---|
| 470 | } |
---|
[71f4e4f] | 471 | |
---|
[6c4ff37] | 472 | void CodeGenerator::visit( LogicalExpr *logicalExpr ) { |
---|
| 473 | output << "("; |
---|
[51587aa] | 474 | logicalExpr->get_arg1()->accept( *this ); |
---|
| 475 | if ( logicalExpr->get_isAnd() ) { |
---|
[6c4ff37] | 476 | output << " && "; |
---|
[51587aa] | 477 | } else { |
---|
[6c4ff37] | 478 | output << " || "; |
---|
[51587aa] | 479 | } // if |
---|
| 480 | logicalExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 481 | output << ")"; |
---|
[51587aa] | 482 | } |
---|
[71f4e4f] | 483 | |
---|
[6c4ff37] | 484 | void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) { |
---|
| 485 | output << "("; |
---|
[51587aa] | 486 | conditionalExpr->get_arg1()->accept( *this ); |
---|
[6c4ff37] | 487 | output << " ? "; |
---|
[51587aa] | 488 | conditionalExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 489 | output << " : "; |
---|
[51587aa] | 490 | conditionalExpr->get_arg3()->accept( *this ); |
---|
[6c4ff37] | 491 | output << ")"; |
---|
[51587aa] | 492 | } |
---|
[71f4e4f] | 493 | |
---|
[6c4ff37] | 494 | void CodeGenerator::visit( CommaExpr *commaExpr ) { |
---|
| 495 | output << "("; |
---|
[51587aa] | 496 | commaExpr->get_arg1()->accept( *this ); |
---|
[6c4ff37] | 497 | output << " , "; |
---|
[51587aa] | 498 | commaExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 499 | output << ")"; |
---|
[51587aa] | 500 | } |
---|
[71f4e4f] | 501 | |
---|
[6c4ff37] | 502 | void CodeGenerator::visit( TupleExpr *tupleExpr ) {} |
---|
[71f4e4f] | 503 | |
---|
[6c4ff37] | 504 | void CodeGenerator::visit( TypeExpr *typeExpr ) {} |
---|
[2b6c1e0] | 505 | |
---|
[7f5566b] | 506 | void CodeGenerator::visit( AsmExpr *asmExpr ) { |
---|
| 507 | if ( asmExpr->get_inout() ) { |
---|
| 508 | output << "[ "; |
---|
| 509 | asmExpr->get_inout()->accept( *this ); |
---|
| 510 | output << " ] "; |
---|
| 511 | } // if |
---|
| 512 | asmExpr->get_constraint()->accept( *this ); |
---|
| 513 | output << " ( "; |
---|
| 514 | asmExpr->get_operand()->accept( *this ); |
---|
| 515 | output << " )"; |
---|
| 516 | } |
---|
| 517 | |
---|
[51587aa] | 518 | //*** Statements |
---|
[6c4ff37] | 519 | void CodeGenerator::visit( CompoundStmt *compoundStmt ) { |
---|
[51587aa] | 520 | std::list<Statement*> ks = compoundStmt->get_kids(); |
---|
[2b6c1e0] | 521 | output << "{" << endl; |
---|
[51587aa] | 522 | |
---|
[2b6c1e0] | 523 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 524 | |
---|
[7f5566b] | 525 | for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) { |
---|
[cda48b6] | 526 | output << indent << printLabels( (*i)->get_labels() ); |
---|
[7f5566b] | 527 | (*i)->accept( *this ); |
---|
[2b6c1e0] | 528 | |
---|
[6c4ff37] | 529 | output << endl; |
---|
[2b6c1e0] | 530 | if ( wantSpacing( *i ) ) { |
---|
| 531 | output << endl; |
---|
| 532 | } |
---|
[51587aa] | 533 | } |
---|
[71f4e4f] | 534 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 535 | |
---|
[cda48b6] | 536 | output << indent << "}"; |
---|
[51587aa] | 537 | } |
---|
| 538 | |
---|
[6c4ff37] | 539 | void CodeGenerator::visit( ExprStmt *exprStmt ) { |
---|
[71f4e4f] | 540 | // I don't see why this check is necessary. |
---|
| 541 | // If this starts to cause problems then put it back in, |
---|
[6c4ff37] | 542 | // with an explanation |
---|
| 543 | assert( exprStmt ); |
---|
| 544 | |
---|
| 545 | // if ( exprStmt != 0 ) { |
---|
| 546 | exprStmt->get_expr()->accept( *this ); |
---|
| 547 | output << ";" ; |
---|
| 548 | // } // if |
---|
[51587aa] | 549 | } |
---|
| 550 | |
---|
[7f5566b] | 551 | void CodeGenerator::visit( AsmStmt *asmStmt ) { |
---|
| 552 | output << "asm "; |
---|
| 553 | if ( asmStmt->get_voltile() ) output << "volatile "; |
---|
| 554 | if ( ! asmStmt->get_gotolabels().empty() ) output << "goto "; |
---|
| 555 | output << "( "; |
---|
| 556 | if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this ); |
---|
| 557 | output << " : "; |
---|
| 558 | genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() ); |
---|
| 559 | output << " : "; |
---|
| 560 | genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() ); |
---|
| 561 | output << " : "; |
---|
| 562 | genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() ); |
---|
| 563 | if ( ! asmStmt->get_gotolabels().empty() ) { |
---|
| 564 | output << " : "; |
---|
| 565 | for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) { |
---|
| 566 | output << *begin++; |
---|
| 567 | if ( begin == asmStmt->get_gotolabels().end() ) break; |
---|
| 568 | output << ", "; |
---|
| 569 | } // for |
---|
| 570 | } // if |
---|
| 571 | output << " );" ; |
---|
| 572 | } |
---|
| 573 | |
---|
[6c4ff37] | 574 | void CodeGenerator::visit( IfStmt *ifStmt ) { |
---|
[7f5566b] | 575 | output << "if ( "; |
---|
| 576 | ifStmt->get_condition()->accept( *this ); |
---|
| 577 | output << " ) "; |
---|
[51587aa] | 578 | |
---|
[7f5566b] | 579 | ifStmt->get_thenPart()->accept( *this ); |
---|
[51587aa] | 580 | |
---|
| 581 | if ( ifStmt->get_elsePart() != 0) { |
---|
[2b6c1e0] | 582 | output << " else "; |
---|
[7f5566b] | 583 | ifStmt->get_elsePart()->accept( *this ); |
---|
[51587aa] | 584 | } // if |
---|
| 585 | } |
---|
| 586 | |
---|
[6c4ff37] | 587 | void CodeGenerator::visit( SwitchStmt *switchStmt ) { |
---|
[7f5566b] | 588 | output << "switch ( " ; |
---|
| 589 | switchStmt->get_condition()->accept( *this ); |
---|
| 590 | output << " ) "; |
---|
[71f4e4f] | 591 | |
---|
[2b6c1e0] | 592 | output << "{" << std::endl; |
---|
[6c4ff37] | 593 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 594 | |
---|
[6c4ff37] | 595 | acceptAll( switchStmt->get_branches(), *this ); |
---|
[51587aa] | 596 | |
---|
[6c4ff37] | 597 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 598 | |
---|
[cda48b6] | 599 | output << indent << "}"; |
---|
[51587aa] | 600 | } |
---|
| 601 | |
---|
[6c4ff37] | 602 | void CodeGenerator::visit( CaseStmt *caseStmt ) { |
---|
[cda48b6] | 603 | output << indent; |
---|
[eb3261f] | 604 | if ( caseStmt->isDefault()) { |
---|
[2b6c1e0] | 605 | output << "default"; |
---|
[eb3261f] | 606 | } else { |
---|
[2b6c1e0] | 607 | output << "case "; |
---|
[7f5566b] | 608 | caseStmt->get_condition()->accept( *this ); |
---|
[17cd4eb] | 609 | } // if |
---|
[6c4ff37] | 610 | output << ":\n"; |
---|
[71f4e4f] | 611 | |
---|
[51587aa] | 612 | std::list<Statement *> sts = caseStmt->get_statements(); |
---|
| 613 | |
---|
[6c4ff37] | 614 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 615 | for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) { |
---|
[cda48b6] | 616 | output << indent << printLabels( (*i)->get_labels() ) ; |
---|
[7f5566b] | 617 | (*i)->accept( *this ); |
---|
[6c4ff37] | 618 | output << endl; |
---|
[51587aa] | 619 | } |
---|
[6c4ff37] | 620 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 621 | } |
---|
| 622 | |
---|
[6c4ff37] | 623 | void CodeGenerator::visit( BranchStmt *branchStmt ) { |
---|
[51587aa] | 624 | switch ( branchStmt->get_type()) { |
---|
| 625 | case BranchStmt::Goto: |
---|
| 626 | if ( ! branchStmt->get_target().empty() ) |
---|
[6c4ff37] | 627 | output << "goto " << branchStmt->get_target(); |
---|
[71f4e4f] | 628 | else { |
---|
[51587aa] | 629 | if ( branchStmt->get_computedTarget() != 0 ) { |
---|
[6c4ff37] | 630 | output << "goto *"; |
---|
[51587aa] | 631 | branchStmt->get_computedTarget()->accept( *this ); |
---|
| 632 | } // if |
---|
| 633 | } // if |
---|
| 634 | break; |
---|
| 635 | case BranchStmt::Break: |
---|
[6c4ff37] | 636 | output << "break"; |
---|
[51587aa] | 637 | break; |
---|
| 638 | case BranchStmt::Continue: |
---|
[6c4ff37] | 639 | output << "continue"; |
---|
[51587aa] | 640 | break; |
---|
| 641 | } |
---|
[2b6c1e0] | 642 | output << ";"; |
---|
[51587aa] | 643 | } |
---|
| 644 | |
---|
| 645 | |
---|
[6c4ff37] | 646 | void CodeGenerator::visit( ReturnStmt *returnStmt ) { |
---|
| 647 | output << "return "; |
---|
[51587aa] | 648 | |
---|
| 649 | // xxx -- check for null expression; |
---|
| 650 | if ( returnStmt->get_expr() ) { |
---|
| 651 | returnStmt->get_expr()->accept( *this ); |
---|
| 652 | } // if |
---|
[6c4ff37] | 653 | output << ";"; |
---|
[51587aa] | 654 | } |
---|
| 655 | |
---|
[6c4ff37] | 656 | void CodeGenerator::visit( WhileStmt *whileStmt ) { |
---|
[51587aa] | 657 | if ( whileStmt->get_isDoWhile() ) |
---|
[6c4ff37] | 658 | output << "do" ; |
---|
[51587aa] | 659 | else { |
---|
[6c4ff37] | 660 | output << "while (" ; |
---|
[7f5566b] | 661 | whileStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 662 | output << ")"; |
---|
[51587aa] | 663 | } // if |
---|
[2b6c1e0] | 664 | output << " "; |
---|
[51587aa] | 665 | |
---|
[2b6c1e0] | 666 | output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() ); |
---|
[51587aa] | 667 | whileStmt->get_body()->accept( *this ); |
---|
| 668 | |
---|
[cda48b6] | 669 | output << indent; |
---|
[51587aa] | 670 | |
---|
| 671 | if ( whileStmt->get_isDoWhile() ) { |
---|
[6c4ff37] | 672 | output << " while (" ; |
---|
[7f5566b] | 673 | whileStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 674 | output << ");"; |
---|
[51587aa] | 675 | } // if |
---|
| 676 | } |
---|
| 677 | |
---|
[6c4ff37] | 678 | void CodeGenerator::visit( ForStmt *forStmt ) { |
---|
[71f4e4f] | 679 | // initialization is always hoisted, so don't |
---|
| 680 | // bother doing anything with that |
---|
[145f1fc] | 681 | output << "for (;"; |
---|
[51587aa] | 682 | |
---|
| 683 | if ( forStmt->get_condition() != 0 ) |
---|
| 684 | forStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 685 | output << ";"; |
---|
[51587aa] | 686 | |
---|
| 687 | if ( forStmt->get_increment() != 0 ) |
---|
| 688 | forStmt->get_increment()->accept( *this ); |
---|
[2b6c1e0] | 689 | output << ") "; |
---|
[51587aa] | 690 | |
---|
| 691 | if ( forStmt->get_body() != 0 ) { |
---|
[2b6c1e0] | 692 | output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() ); |
---|
[51587aa] | 693 | forStmt->get_body()->accept( *this ); |
---|
| 694 | } // if |
---|
| 695 | } |
---|
| 696 | |
---|
[6c4ff37] | 697 | void CodeGenerator::visit( NullStmt *nullStmt ) { |
---|
[cda48b6] | 698 | //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() ); |
---|
[6c4ff37] | 699 | output << "/* null statement */ ;"; |
---|
[51587aa] | 700 | } |
---|
| 701 | |
---|
[6c4ff37] | 702 | void CodeGenerator::visit( DeclStmt *declStmt ) { |
---|
[51587aa] | 703 | declStmt->get_decl()->accept( *this ); |
---|
[71f4e4f] | 704 | |
---|
[51587aa] | 705 | if ( doSemicolon( declStmt->get_decl() ) ) { |
---|
[6c4ff37] | 706 | output << ";"; |
---|
[51587aa] | 707 | } // if |
---|
| 708 | } |
---|
| 709 | |
---|
[6c4ff37] | 710 | std::string CodeGenerator::printLabels( std::list< Label > &l ) { |
---|
[51587aa] | 711 | std::string str( "" ); |
---|
[6c4ff37] | 712 | l.unique(); // assumes a sorted list. Why not use set? |
---|
[51587aa] | 713 | |
---|
| 714 | for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ ) |
---|
| 715 | str += *i + ": "; |
---|
| 716 | |
---|
| 717 | return str; |
---|
| 718 | } |
---|
| 719 | |
---|
[6c4ff37] | 720 | void CodeGenerator::handleStorageClass( Declaration *decl ) { |
---|
[51587aa] | 721 | switch ( decl->get_storageClass() ) { |
---|
[68cd1ce] | 722 | case DeclarationNode::Extern: |
---|
[6c4ff37] | 723 | output << "extern "; |
---|
[51587aa] | 724 | break; |
---|
[68cd1ce] | 725 | case DeclarationNode::Static: |
---|
[6c4ff37] | 726 | output << "static "; |
---|
[51587aa] | 727 | break; |
---|
[68cd1ce] | 728 | case DeclarationNode::Auto: |
---|
[51587aa] | 729 | // silently drop storage class |
---|
| 730 | break; |
---|
[68cd1ce] | 731 | case DeclarationNode::Register: |
---|
[6c4ff37] | 732 | output << "register "; |
---|
[51587aa] | 733 | break; |
---|
[68cd1ce] | 734 | case DeclarationNode::Inline: |
---|
[de62360d] | 735 | output << "inline "; |
---|
[f38c8d9] | 736 | break; |
---|
[68cd1ce] | 737 | case DeclarationNode::Fortran: |
---|
| 738 | output << "fortran "; |
---|
| 739 | break; |
---|
| 740 | case DeclarationNode::Noreturn: |
---|
| 741 | output << "_Noreturn "; |
---|
| 742 | break; |
---|
| 743 | case DeclarationNode::Threadlocal: |
---|
| 744 | output << "_Thread_local "; |
---|
| 745 | break; |
---|
| 746 | case DeclarationNode::NoStorageClass: |
---|
[f38c8d9] | 747 | break; |
---|
[843054c2] | 748 | } // switch |
---|
[51587aa] | 749 | } |
---|
[51b7345] | 750 | } // namespace CodeGen |
---|
[51587aa] | 751 | |
---|
| 752 | // Local Variables: // |
---|
| 753 | // tab-width: 4 // |
---|
| 754 | // mode: c++ // |
---|
| 755 | // compile-command: "make install" // |
---|
| 756 | // End: // |
---|