[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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[9e2c1f0] | 12 | // Last Modified On : Fri May 06 16:01:00 2016 |
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[d63eeb0] | 13 | // Update Count : 255 |
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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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| 47 | dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * > ( stmt ) || dynamic_cast< SwitchStmt *>( stmt ); |
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| 48 | } |
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| 49 | |
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[cda48b6] | 50 | ostream & CodeGenerator::Indenter::operator()( ostream & output ) { |
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| 51 | return output << string( cg.cur_indent, ' ' ); |
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| 52 | } |
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| 53 | |
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| 54 | ostream & operator<<( ostream & output, CodeGenerator::Indenter &indent ) { |
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| 55 | return indent( output ); |
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| 56 | } |
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[51587aa] | 57 | |
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[7f5566b] | 58 | CodeGenerator::CodeGenerator( std::ostream &os ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ) { } |
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[cda48b6] | 59 | |
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| 60 | CodeGenerator::CodeGenerator( std::ostream &os, std::string init, int indentation, bool infunp ) |
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[7f5566b] | 61 | : indent( *this), cur_indent( indentation ), insideFunction( infunp ), output( os ) { |
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[6c4ff37] | 62 | //output << std::string( init ); |
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[51587aa] | 63 | } |
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| 64 | |
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[cda48b6] | 65 | CodeGenerator::CodeGenerator( std::ostream &os, char *init, int indentation, bool infunp ) |
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[7f5566b] | 66 | : indent( *this ), cur_indent( indentation ), insideFunction( infunp ), output( os ) { |
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[6c4ff37] | 67 | //output << std::string( init ); |
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[51587aa] | 68 | } |
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| 69 | |
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| 70 | string mangleName( DeclarationWithType *decl ) { |
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| 71 | if ( decl->get_mangleName() != "" ) { |
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[f326f99] | 72 | // need to incorporate scope level in order to differentiate names for destructors |
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| 73 | return decl->get_scopedMangleName(); |
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[51587aa] | 74 | } else { |
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| 75 | return decl->get_name(); |
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| 76 | } // if |
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| 77 | } |
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[94b4364] | 78 | |
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[7baed7d] | 79 | void CodeGenerator::genAttributes( std::list< Attribute * > & attributes ) { |
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| 80 | if ( ! attributes.empty() ) { |
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| 81 | output << "__attribute__ (("; |
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| 82 | for ( Attribute *& attr : attributes ) { |
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| 83 | if ( ! attr->empty() ) { |
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| 84 | output << attr->get_name() << "("; |
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| 85 | genCommaList( attr->get_parameters().begin(), attr->get_parameters().end() ); |
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| 86 | output << ")"; |
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[03e5d14] | 87 | } |
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[7baed7d] | 88 | output << ","; |
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| 89 | } |
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| 90 | output << ")) "; |
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[4e24610] | 91 | } |
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[7baed7d] | 92 | } |
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| 93 | |
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| 94 | |
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| 95 | //*** Declarations |
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| 96 | void CodeGenerator::visit( FunctionDecl *functionDecl ) { |
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| 97 | genAttributes( functionDecl->get_attributes() ); |
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| 98 | |
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[51587aa] | 99 | handleStorageClass( functionDecl ); |
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[f38c8d9] | 100 | if ( functionDecl->get_isInline() ) { |
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[6c4ff37] | 101 | output << "inline "; |
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[f38c8d9] | 102 | } // if |
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[de62360d] | 103 | if ( functionDecl->get_isNoreturn() ) { |
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| 104 | output << "_Noreturn "; |
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| 105 | } // if |
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[6c4ff37] | 106 | output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) ); |
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[51587aa] | 107 | |
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| 108 | // how to get this to the Functype? |
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| 109 | std::list< Declaration * > olds = functionDecl->get_oldDecls(); |
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| 110 | if ( ! olds.empty() ) { |
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[6c4ff37] | 111 | output << " /* function has old declaration */"; |
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[51587aa] | 112 | } // if |
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| 113 | |
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| 114 | // acceptAll( functionDecl->get_oldDecls(), *this ); |
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| 115 | if ( functionDecl->get_statements() ) { |
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[7f5566b] | 116 | functionDecl->get_statements()->accept( *this ); |
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[51587aa] | 117 | } // if |
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| 118 | } |
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| 119 | |
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[6c4ff37] | 120 | void CodeGenerator::visit( ObjectDecl *objectDecl ) { |
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[51587aa] | 121 | handleStorageClass( objectDecl ); |
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[6c4ff37] | 122 | output << genType( objectDecl->get_type(), mangleName( objectDecl ) ); |
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[71f4e4f] | 123 | |
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[51587aa] | 124 | if ( objectDecl->get_init() ) { |
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[6c4ff37] | 125 | output << " = "; |
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[51587aa] | 126 | objectDecl->get_init()->accept( *this ); |
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| 127 | } // if |
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| 128 | if ( objectDecl->get_bitfieldWidth() ) { |
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[6c4ff37] | 129 | output << ":"; |
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[51587aa] | 130 | objectDecl->get_bitfieldWidth()->accept( *this ); |
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| 131 | } // if |
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| 132 | } |
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| 133 | |
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[6c4ff37] | 134 | void CodeGenerator::handleAggregate( AggregateDecl *aggDecl ) { |
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[51587aa] | 135 | if ( aggDecl->get_name() != "" ) |
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[6c4ff37] | 136 | output << aggDecl->get_name(); |
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[71f4e4f] | 137 | |
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[51587aa] | 138 | std::list< Declaration * > &memb = aggDecl->get_members(); |
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| 139 | |
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| 140 | if ( ! memb.empty() ) { |
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[94b4364] | 141 | output << " {" << endl; |
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[51587aa] | 142 | |
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[71f4e4f] | 143 | cur_indent += CodeGenerator::tabsize; |
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[51587aa] | 144 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) { |
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[71f4e4f] | 145 | output << indent; |
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[7f5566b] | 146 | (*i)->accept( *this ); |
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[6c4ff37] | 147 | output << ";" << endl; |
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[51587aa] | 148 | } |
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| 149 | |
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[71f4e4f] | 150 | cur_indent -= CodeGenerator::tabsize; |
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[51587aa] | 151 | |
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[cda48b6] | 152 | output << indent << "}"; |
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[17cd4eb] | 153 | } // if |
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[51587aa] | 154 | } |
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[17cd4eb] | 155 | |
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[6c4ff37] | 156 | void CodeGenerator::visit( StructDecl *structDecl ) { |
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| 157 | output << "struct "; |
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[51587aa] | 158 | handleAggregate( structDecl ); |
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| 159 | } |
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[17cd4eb] | 160 | |
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[6c4ff37] | 161 | void CodeGenerator::visit( UnionDecl *aggregateDecl ) { |
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| 162 | output << "union "; |
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[51587aa] | 163 | handleAggregate( aggregateDecl ); |
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| 164 | } |
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[71f4e4f] | 165 | |
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[6c4ff37] | 166 | void CodeGenerator::visit( EnumDecl *aggDecl ) { |
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| 167 | output << "enum "; |
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[51587aa] | 168 | |
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| 169 | if ( aggDecl->get_name() != "" ) |
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[6c4ff37] | 170 | output << aggDecl->get_name(); |
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[71f4e4f] | 171 | |
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[51587aa] | 172 | std::list< Declaration* > &memb = aggDecl->get_members(); |
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| 173 | |
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| 174 | if ( ! memb.empty() ) { |
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[cda48b6] | 175 | output << " {" << endl; |
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[51587aa] | 176 | |
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[71f4e4f] | 177 | cur_indent += CodeGenerator::tabsize; |
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[51587aa] | 178 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) { |
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| 179 | ObjectDecl *obj = dynamic_cast< ObjectDecl* >( *i ); |
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| 180 | assert( obj ); |
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[71f4e4f] | 181 | output << indent << mangleName( obj ); |
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[51587aa] | 182 | if ( obj->get_init() ) { |
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[6c4ff37] | 183 | output << " = "; |
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[7f5566b] | 184 | obj->get_init()->accept( *this ); |
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[51587aa] | 185 | } // if |
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[6c4ff37] | 186 | output << "," << endl; |
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[51587aa] | 187 | } // for |
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| 188 | |
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[71f4e4f] | 189 | cur_indent -= CodeGenerator::tabsize; |
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[51587aa] | 190 | |
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[cda48b6] | 191 | output << indent << "}"; |
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[51587aa] | 192 | } // if |
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| 193 | } |
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[71f4e4f] | 194 | |
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[4040425] | 195 | void CodeGenerator::visit( TraitDecl *aggregateDecl ) {} |
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[71f4e4f] | 196 | |
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[6c4ff37] | 197 | void CodeGenerator::visit( TypedefDecl *typeDecl ) { |
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| 198 | output << "typedef "; |
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| 199 | output << genType( typeDecl->get_base(), typeDecl->get_name() ); |
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[51587aa] | 200 | } |
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[71f4e4f] | 201 | |
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[6c4ff37] | 202 | void CodeGenerator::visit( TypeDecl *typeDecl ) { |
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[51587aa] | 203 | // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes, |
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| 204 | // still to be done |
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[6c4ff37] | 205 | output << "extern unsigned long " << typeDecl->get_name(); |
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[51587aa] | 206 | if ( typeDecl->get_base() ) { |
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[6c4ff37] | 207 | output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )"; |
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[51587aa] | 208 | } // if |
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| 209 | } |
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| 210 | |
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[e45215c] | 211 | void CodeGenerator::printDesignators( std::list< Expression * > & designators ) { |
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| 212 | typedef std::list< Expression * > DesignatorList; |
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| 213 | if ( designators.size() == 0 ) return; |
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| 214 | for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) { |
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[8a4da06] | 215 | if ( dynamic_cast< NameExpr * >( *iter ) ) { |
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[f32c7f4] | 216 | // if expression is a name, then initializing aggregate member |
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| 217 | output << "."; |
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| 218 | (*iter)->accept( *this ); |
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| 219 | } else { |
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| 220 | // if not a simple name, it has to be a constant expression, i.e. an array designator |
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[e45215c] | 221 | output << "["; |
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| 222 | (*iter)->accept( *this ); |
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| 223 | output << "]"; |
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| 224 | } |
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| 225 | } |
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| 226 | output << " = "; |
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| 227 | } |
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| 228 | |
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[6c4ff37] | 229 | void CodeGenerator::visit( SingleInit *init ) { |
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[e45215c] | 230 | printDesignators( init->get_designators() ); |
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[51587aa] | 231 | init->get_value()->accept( *this ); |
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| 232 | } |
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| 233 | |
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[6c4ff37] | 234 | void CodeGenerator::visit( ListInit *init ) { |
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[e45215c] | 235 | printDesignators( init->get_designators() ); |
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[6c4ff37] | 236 | output << "{ "; |
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[5b40f30] | 237 | if ( init->begin_initializers() == init->end_initializers() ) { |
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| 238 | // illegal to leave initializer list empty for scalar initializers, |
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| 239 | // but always legal to have 0 |
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| 240 | output << "0"; |
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| 241 | } else { |
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| 242 | genCommaList( init->begin_initializers(), init->end_initializers() ); |
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| 243 | } |
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[6c4ff37] | 244 | output << " }"; |
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[51587aa] | 245 | } |
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| 246 | |
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[71f4e4f] | 247 | void CodeGenerator::visit( Constant *constant ) { |
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[6c4ff37] | 248 | output << constant->get_value() ; |
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[51587aa] | 249 | } |
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| 250 | |
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| 251 | //*** Expressions |
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[6c4ff37] | 252 | void CodeGenerator::visit( ApplicationExpr *applicationExpr ) { |
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[51587aa] | 253 | if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) { |
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| 254 | OperatorInfo opInfo; |
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| 255 | if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) { |
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| 256 | std::list< Expression* >::iterator arg = applicationExpr->get_args().begin(); |
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| 257 | switch ( opInfo.type ) { |
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| 258 | case OT_PREFIXASSIGN: |
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| 259 | case OT_POSTFIXASSIGN: |
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| 260 | case OT_INFIXASSIGN: |
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[64071c2] | 261 | case OT_CTOR: |
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| 262 | case OT_DTOR: |
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[51587aa] | 263 | { |
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| 264 | assert( arg != applicationExpr->get_args().end() ); |
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| 265 | if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) { |
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[356189a] | 266 | // remove & from first assignment/ctor argument |
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[51587aa] | 267 | *arg = addrExpr->get_arg(); |
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| 268 | } else { |
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[356189a] | 269 | // no address-of operator, so must be a pointer - add dereference |
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[51587aa] | 270 | UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) ); |
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| 271 | newExpr->get_args().push_back( *arg ); |
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[10a7775] | 272 | assert( (*arg)->get_results().size() == 1 ); |
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| 273 | Type * type = InitTweak::getPointerBase( (*arg)->get_results().front() ); |
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| 274 | assert( type ); |
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| 275 | newExpr->get_results().push_back( type ); |
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[51587aa] | 276 | *arg = newExpr; |
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| 277 | } // if |
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| 278 | break; |
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| 279 | } |
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[71f4e4f] | 280 | |
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[51587aa] | 281 | default: |
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| 282 | // do nothing |
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| 283 | ; |
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| 284 | } |
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[71f4e4f] | 285 | |
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[51587aa] | 286 | switch ( opInfo.type ) { |
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| 287 | case OT_INDEX: |
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| 288 | assert( applicationExpr->get_args().size() == 2 ); |
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| 289 | (*arg++)->accept( *this ); |
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[6c4ff37] | 290 | output << "["; |
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[51587aa] | 291 | (*arg)->accept( *this ); |
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[6c4ff37] | 292 | output << "]"; |
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[51587aa] | 293 | break; |
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[71f4e4f] | 294 | |
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[51587aa] | 295 | case OT_CALL: |
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[356189a] | 296 | // there are no intrinsic definitions of the function call operator |
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[51587aa] | 297 | assert( false ); |
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| 298 | break; |
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[71f4e4f] | 299 | |
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[f1e012b] | 300 | case OT_CTOR: |
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[c2ce2350] | 301 | case OT_DTOR: |
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[356189a] | 302 | if ( applicationExpr->get_args().size() == 1 ) { |
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[c2ce2350] | 303 | // the expression fed into a single parameter constructor or destructor |
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[64071c2] | 304 | // may contain side effects, so must still output this expression |
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| 305 | output << "("; |
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[356189a] | 306 | (*arg++)->accept( *this ); |
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[64071c2] | 307 | output << ") /* " << opInfo.inputName << " */"; |
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[356189a] | 308 | } else if ( applicationExpr->get_args().size() == 2 ) { |
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[c2ce2350] | 309 | // intrinsic two parameter constructors are essentially bitwise assignment |
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[356189a] | 310 | output << "("; |
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| 311 | (*arg++)->accept( *this ); |
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| 312 | output << opInfo.symbol; |
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| 313 | (*arg)->accept( *this ); |
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[c2ce2350] | 314 | output << ") /* " << opInfo.inputName << " */"; |
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[356189a] | 315 | } else { |
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[c2ce2350] | 316 | // no constructors with 0 or more than 2 parameters |
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[356189a] | 317 | assert( false ); |
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| 318 | } |
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| 319 | break; |
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[f1e012b] | 320 | |
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[51587aa] | 321 | case OT_PREFIX: |
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| 322 | case OT_PREFIXASSIGN: |
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| 323 | assert( applicationExpr->get_args().size() == 1 ); |
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[6c4ff37] | 324 | output << "("; |
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| 325 | output << opInfo.symbol; |
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[51587aa] | 326 | (*arg)->accept( *this ); |
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[6c4ff37] | 327 | output << ")"; |
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[51587aa] | 328 | break; |
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[71f4e4f] | 329 | |
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[51587aa] | 330 | case OT_POSTFIX: |
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| 331 | case OT_POSTFIXASSIGN: |
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| 332 | assert( applicationExpr->get_args().size() == 1 ); |
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| 333 | (*arg)->accept( *this ); |
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[6c4ff37] | 334 | output << opInfo.symbol; |
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[51587aa] | 335 | break; |
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| 336 | |
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[f1e012b] | 337 | |
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[51587aa] | 338 | case OT_INFIX: |
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| 339 | case OT_INFIXASSIGN: |
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| 340 | assert( applicationExpr->get_args().size() == 2 ); |
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[6c4ff37] | 341 | output << "("; |
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[51587aa] | 342 | (*arg++)->accept( *this ); |
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[6c4ff37] | 343 | output << opInfo.symbol; |
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[51587aa] | 344 | (*arg)->accept( *this ); |
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[6c4ff37] | 345 | output << ")"; |
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[51587aa] | 346 | break; |
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[71f4e4f] | 347 | |
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[51587aa] | 348 | case OT_CONSTANT: |
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[721f17a] | 349 | case OT_LABELADDRESS: |
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| 350 | // there are no intrinsic definitions of 0/1 or label addresses as functions |
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[51587aa] | 351 | assert( false ); |
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| 352 | } |
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[17cd4eb] | 353 | } else { |
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[51587aa] | 354 | varExpr->accept( *this ); |
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[6c4ff37] | 355 | output << "("; |
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[51587aa] | 356 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
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[6c4ff37] | 357 | output << ")"; |
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[17cd4eb] | 358 | } // if |
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[51587aa] | 359 | } else { |
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| 360 | applicationExpr->get_function()->accept( *this ); |
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[6c4ff37] | 361 | output << "("; |
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[51587aa] | 362 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
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[6c4ff37] | 363 | output << ")"; |
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[51587aa] | 364 | } // if |
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| 365 | } |
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[71f4e4f] | 366 | |
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[6c4ff37] | 367 | void CodeGenerator::visit( UntypedExpr *untypedExpr ) { |
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[51587aa] | 368 | if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) { |
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| 369 | OperatorInfo opInfo; |
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| 370 | if ( operatorLookup( nameExpr->get_name(), opInfo ) ) { |
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| 371 | std::list< Expression* >::iterator arg = untypedExpr->get_args().begin(); |
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| 372 | switch ( opInfo.type ) { |
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| 373 | case OT_INDEX: |
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| 374 | assert( untypedExpr->get_args().size() == 2 ); |
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| 375 | (*arg++)->accept( *this ); |
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[6c4ff37] | 376 | output << "["; |
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[51587aa] | 377 | (*arg)->accept( *this ); |
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[6c4ff37] | 378 | output << "]"; |
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[51587aa] | 379 | break; |
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[71f4e4f] | 380 | |
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[51587aa] | 381 | case OT_CALL: |
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[f1e012b] | 382 | assert( false ); |
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| 383 | |
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[c2ce2350] | 384 | |
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| 385 | case OT_CTOR: |
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| 386 | case OT_DTOR: |
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| 387 | if ( untypedExpr->get_args().size() == 1 ) { |
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| 388 | // the expression fed into a single parameter constructor or destructor |
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[64071c2] | 389 | // may contain side effects, so must still output this expression |
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| 390 | output << "("; |
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[c2ce2350] | 391 | (*arg++)->accept( *this ); |
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[64071c2] | 392 | output << ") /* " << opInfo.inputName << " */"; |
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[c2ce2350] | 393 | } else if ( untypedExpr->get_args().size() == 2 ) { |
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| 394 | // intrinsic two parameter constructors are essentially bitwise assignment |
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| 395 | output << "("; |
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| 396 | (*arg++)->accept( *this ); |
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| 397 | output << opInfo.symbol; |
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| 398 | (*arg)->accept( *this ); |
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| 399 | output << ") /* " << opInfo.inputName << " */"; |
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| 400 | } else { |
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| 401 | // no constructors with 0 or more than 2 parameters |
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| 402 | assert( false ); |
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| 403 | } |
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[51587aa] | 404 | break; |
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[71f4e4f] | 405 | |
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[51587aa] | 406 | case OT_PREFIX: |
---|
| 407 | case OT_PREFIXASSIGN: |
---|
[de62360d] | 408 | case OT_LABELADDRESS: |
---|
[51587aa] | 409 | assert( untypedExpr->get_args().size() == 1 ); |
---|
[6c4ff37] | 410 | output << "("; |
---|
| 411 | output << opInfo.symbol; |
---|
[51587aa] | 412 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 413 | output << ")"; |
---|
[51587aa] | 414 | break; |
---|
[71f4e4f] | 415 | |
---|
[51587aa] | 416 | case OT_POSTFIX: |
---|
| 417 | case OT_POSTFIXASSIGN: |
---|
| 418 | assert( untypedExpr->get_args().size() == 1 ); |
---|
| 419 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 420 | output << opInfo.symbol; |
---|
[51587aa] | 421 | break; |
---|
[71f4e4f] | 422 | |
---|
[51587aa] | 423 | case OT_INFIX: |
---|
| 424 | case OT_INFIXASSIGN: |
---|
| 425 | assert( untypedExpr->get_args().size() == 2 ); |
---|
[6c4ff37] | 426 | output << "("; |
---|
[51587aa] | 427 | (*arg++)->accept( *this ); |
---|
[6c4ff37] | 428 | output << opInfo.symbol; |
---|
[51587aa] | 429 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 430 | output << ")"; |
---|
[51587aa] | 431 | break; |
---|
[71f4e4f] | 432 | |
---|
[51587aa] | 433 | case OT_CONSTANT: |
---|
| 434 | // there are no intrinsic definitions of 0 or 1 as functions |
---|
| 435 | assert( false ); |
---|
| 436 | } |
---|
| 437 | } else { |
---|
| 438 | nameExpr->accept( *this ); |
---|
[6c4ff37] | 439 | output << "("; |
---|
[51587aa] | 440 | genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() ); |
---|
[6c4ff37] | 441 | output << ")"; |
---|
[51587aa] | 442 | } // if |
---|
| 443 | } else { |
---|
| 444 | untypedExpr->get_function()->accept( *this ); |
---|
[6c4ff37] | 445 | output << "("; |
---|
[51587aa] | 446 | genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() ); |
---|
[6c4ff37] | 447 | output << ")"; |
---|
[51587aa] | 448 | } // if |
---|
| 449 | } |
---|
[71f4e4f] | 450 | |
---|
[6c4ff37] | 451 | void CodeGenerator::visit( NameExpr *nameExpr ) { |
---|
[51587aa] | 452 | OperatorInfo opInfo; |
---|
| 453 | if ( operatorLookup( nameExpr->get_name(), opInfo ) ) { |
---|
| 454 | assert( opInfo.type == OT_CONSTANT ); |
---|
[6c4ff37] | 455 | output << opInfo.symbol; |
---|
[51587aa] | 456 | } else { |
---|
[6c4ff37] | 457 | output << nameExpr->get_name(); |
---|
[51587aa] | 458 | } // if |
---|
| 459 | } |
---|
[71f4e4f] | 460 | |
---|
[6c4ff37] | 461 | void CodeGenerator::visit( AddressExpr *addressExpr ) { |
---|
| 462 | output << "(&"; |
---|
[51587aa] | 463 | // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address |
---|
| 464 | if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) { |
---|
[6c4ff37] | 465 | output << mangleName( variableExpr->get_var() ); |
---|
[51587aa] | 466 | } else { |
---|
| 467 | addressExpr->get_arg()->accept( *this ); |
---|
| 468 | } // if |
---|
[6c4ff37] | 469 | output << ")"; |
---|
[51587aa] | 470 | } |
---|
| 471 | |
---|
[6c4ff37] | 472 | void CodeGenerator::visit( CastExpr *castExpr ) { |
---|
[803deb1] | 473 | output << "("; |
---|
| 474 | if ( castExpr->get_results().empty() ) { |
---|
| 475 | output << "(void)" ; |
---|
| 476 | } else if ( ! castExpr->get_results().front()->get_isLvalue() ) { |
---|
| 477 | // at least one result type of cast, but not an lvalue |
---|
| 478 | output << "("; |
---|
| 479 | output << genType( castExpr->get_results().front(), "" ); |
---|
[71f4e4f] | 480 | output << ")"; |
---|
[803deb1] | 481 | } else { |
---|
| 482 | // otherwise, the cast is to an lvalue type, so the cast |
---|
| 483 | // should be dropped, since the result of a cast is |
---|
| 484 | // never an lvalue in C |
---|
[76b48f1] | 485 | } |
---|
[803deb1] | 486 | castExpr->get_arg()->accept( *this ); |
---|
| 487 | output << ")"; |
---|
[51587aa] | 488 | } |
---|
[71f4e4f] | 489 | |
---|
[6c4ff37] | 490 | void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) { |
---|
[51587aa] | 491 | assert( false ); |
---|
| 492 | } |
---|
[71f4e4f] | 493 | |
---|
[6c4ff37] | 494 | void CodeGenerator::visit( MemberExpr *memberExpr ) { |
---|
[51587aa] | 495 | memberExpr->get_aggregate()->accept( *this ); |
---|
[6c4ff37] | 496 | output << "." << mangleName( memberExpr->get_member() ); |
---|
[51587aa] | 497 | } |
---|
[71f4e4f] | 498 | |
---|
[6c4ff37] | 499 | void CodeGenerator::visit( VariableExpr *variableExpr ) { |
---|
[51587aa] | 500 | OperatorInfo opInfo; |
---|
| 501 | if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) { |
---|
[6c4ff37] | 502 | output << opInfo.symbol; |
---|
[51587aa] | 503 | } else { |
---|
[6c4ff37] | 504 | output << mangleName( variableExpr->get_var() ); |
---|
[51587aa] | 505 | } // if |
---|
| 506 | } |
---|
[71f4e4f] | 507 | |
---|
[6c4ff37] | 508 | void CodeGenerator::visit( ConstantExpr *constantExpr ) { |
---|
[51587aa] | 509 | assert( constantExpr->get_constant() ); |
---|
| 510 | constantExpr->get_constant()->accept( *this ); |
---|
| 511 | } |
---|
[71f4e4f] | 512 | |
---|
[6c4ff37] | 513 | void CodeGenerator::visit( SizeofExpr *sizeofExpr ) { |
---|
| 514 | output << "sizeof("; |
---|
[51587aa] | 515 | if ( sizeofExpr->get_isType() ) { |
---|
[6c4ff37] | 516 | output << genType( sizeofExpr->get_type(), "" ); |
---|
[51587aa] | 517 | } else { |
---|
| 518 | sizeofExpr->get_expr()->accept( *this ); |
---|
| 519 | } // if |
---|
[6c4ff37] | 520 | output << ")"; |
---|
[51587aa] | 521 | } |
---|
[47534159] | 522 | |
---|
[25a054f] | 523 | void CodeGenerator::visit( AlignofExpr *alignofExpr ) { |
---|
[47534159] | 524 | // use GCC extension to avoid bumping std to C11 |
---|
| 525 | output << "__alignof__("; |
---|
[25a054f] | 526 | if ( alignofExpr->get_isType() ) { |
---|
| 527 | output << genType( alignofExpr->get_type(), "" ); |
---|
[47534159] | 528 | } else { |
---|
[25a054f] | 529 | alignofExpr->get_expr()->accept( *this ); |
---|
[47534159] | 530 | } // if |
---|
| 531 | output << ")"; |
---|
| 532 | } |
---|
[71f4e4f] | 533 | |
---|
[2a4b088] | 534 | void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) { |
---|
[afc1045] | 535 | assert( false && "UntypedOffsetofExpr should not reach code generation" ); |
---|
[2a4b088] | 536 | } |
---|
| 537 | |
---|
[25a054f] | 538 | void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) { |
---|
| 539 | // use GCC builtin |
---|
| 540 | output << "__builtin_offsetof("; |
---|
| 541 | output << genType( offsetofExpr->get_type(), "" ); |
---|
[e551c69] | 542 | output << ", " << mangleName( offsetofExpr->get_member() ); |
---|
[25a054f] | 543 | output << ")"; |
---|
| 544 | } |
---|
[d63eeb0] | 545 | |
---|
[afc1045] | 546 | void CodeGenerator::visit( OffsetPackExpr *offsetPackExpr ) { |
---|
| 547 | assert( false && "OffsetPackExpr should not reach code generation" ); |
---|
| 548 | } |
---|
[70a06f6] | 549 | |
---|
[6c4ff37] | 550 | void CodeGenerator::visit( LogicalExpr *logicalExpr ) { |
---|
| 551 | output << "("; |
---|
[51587aa] | 552 | logicalExpr->get_arg1()->accept( *this ); |
---|
| 553 | if ( logicalExpr->get_isAnd() ) { |
---|
[6c4ff37] | 554 | output << " && "; |
---|
[51587aa] | 555 | } else { |
---|
[6c4ff37] | 556 | output << " || "; |
---|
[51587aa] | 557 | } // if |
---|
| 558 | logicalExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 559 | output << ")"; |
---|
[51587aa] | 560 | } |
---|
[71f4e4f] | 561 | |
---|
[6c4ff37] | 562 | void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) { |
---|
| 563 | output << "("; |
---|
[51587aa] | 564 | conditionalExpr->get_arg1()->accept( *this ); |
---|
[6c4ff37] | 565 | output << " ? "; |
---|
[51587aa] | 566 | conditionalExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 567 | output << " : "; |
---|
[51587aa] | 568 | conditionalExpr->get_arg3()->accept( *this ); |
---|
[6c4ff37] | 569 | output << ")"; |
---|
[51587aa] | 570 | } |
---|
[71f4e4f] | 571 | |
---|
[6c4ff37] | 572 | void CodeGenerator::visit( CommaExpr *commaExpr ) { |
---|
| 573 | output << "("; |
---|
[51587aa] | 574 | commaExpr->get_arg1()->accept( *this ); |
---|
[6c4ff37] | 575 | output << " , "; |
---|
[51587aa] | 576 | commaExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 577 | output << ")"; |
---|
[51587aa] | 578 | } |
---|
[71f4e4f] | 579 | |
---|
[6c4ff37] | 580 | void CodeGenerator::visit( TupleExpr *tupleExpr ) {} |
---|
[71f4e4f] | 581 | |
---|
[6c4ff37] | 582 | void CodeGenerator::visit( TypeExpr *typeExpr ) {} |
---|
[2b6c1e0] | 583 | |
---|
[7f5566b] | 584 | void CodeGenerator::visit( AsmExpr *asmExpr ) { |
---|
| 585 | if ( asmExpr->get_inout() ) { |
---|
| 586 | output << "[ "; |
---|
| 587 | asmExpr->get_inout()->accept( *this ); |
---|
| 588 | output << " ] "; |
---|
| 589 | } // if |
---|
| 590 | asmExpr->get_constraint()->accept( *this ); |
---|
| 591 | output << " ( "; |
---|
| 592 | asmExpr->get_operand()->accept( *this ); |
---|
| 593 | output << " )"; |
---|
| 594 | } |
---|
| 595 | |
---|
[51587aa] | 596 | //*** Statements |
---|
[6c4ff37] | 597 | void CodeGenerator::visit( CompoundStmt *compoundStmt ) { |
---|
[51587aa] | 598 | std::list<Statement*> ks = compoundStmt->get_kids(); |
---|
[2b6c1e0] | 599 | output << "{" << endl; |
---|
[51587aa] | 600 | |
---|
[2b6c1e0] | 601 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 602 | |
---|
[7f5566b] | 603 | for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) { |
---|
[cda48b6] | 604 | output << indent << printLabels( (*i)->get_labels() ); |
---|
[7f5566b] | 605 | (*i)->accept( *this ); |
---|
[2b6c1e0] | 606 | |
---|
[6c4ff37] | 607 | output << endl; |
---|
[2b6c1e0] | 608 | if ( wantSpacing( *i ) ) { |
---|
| 609 | output << endl; |
---|
| 610 | } |
---|
[51587aa] | 611 | } |
---|
[71f4e4f] | 612 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 613 | |
---|
[cda48b6] | 614 | output << indent << "}"; |
---|
[51587aa] | 615 | } |
---|
| 616 | |
---|
[6c4ff37] | 617 | void CodeGenerator::visit( ExprStmt *exprStmt ) { |
---|
| 618 | assert( exprStmt ); |
---|
[321a2481] | 619 | // cast the top-level expression to void to reduce gcc warnings. |
---|
| 620 | Expression * expr = new CastExpr( exprStmt->get_expr() ); |
---|
| 621 | expr->accept( *this ); |
---|
| 622 | output << ";"; |
---|
[51587aa] | 623 | } |
---|
| 624 | |
---|
[7f5566b] | 625 | void CodeGenerator::visit( AsmStmt *asmStmt ) { |
---|
| 626 | output << "asm "; |
---|
| 627 | if ( asmStmt->get_voltile() ) output << "volatile "; |
---|
| 628 | if ( ! asmStmt->get_gotolabels().empty() ) output << "goto "; |
---|
| 629 | output << "( "; |
---|
| 630 | if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this ); |
---|
| 631 | output << " : "; |
---|
| 632 | genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() ); |
---|
| 633 | output << " : "; |
---|
| 634 | genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() ); |
---|
| 635 | output << " : "; |
---|
| 636 | genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() ); |
---|
| 637 | if ( ! asmStmt->get_gotolabels().empty() ) { |
---|
| 638 | output << " : "; |
---|
| 639 | for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) { |
---|
| 640 | output << *begin++; |
---|
| 641 | if ( begin == asmStmt->get_gotolabels().end() ) break; |
---|
| 642 | output << ", "; |
---|
| 643 | } // for |
---|
| 644 | } // if |
---|
| 645 | output << " );" ; |
---|
| 646 | } |
---|
| 647 | |
---|
[6c4ff37] | 648 | void CodeGenerator::visit( IfStmt *ifStmt ) { |
---|
[7f5566b] | 649 | output << "if ( "; |
---|
| 650 | ifStmt->get_condition()->accept( *this ); |
---|
| 651 | output << " ) "; |
---|
[51587aa] | 652 | |
---|
[7f5566b] | 653 | ifStmt->get_thenPart()->accept( *this ); |
---|
[51587aa] | 654 | |
---|
| 655 | if ( ifStmt->get_elsePart() != 0) { |
---|
[2b6c1e0] | 656 | output << " else "; |
---|
[7f5566b] | 657 | ifStmt->get_elsePart()->accept( *this ); |
---|
[51587aa] | 658 | } // if |
---|
| 659 | } |
---|
| 660 | |
---|
[6c4ff37] | 661 | void CodeGenerator::visit( SwitchStmt *switchStmt ) { |
---|
[7f5566b] | 662 | output << "switch ( " ; |
---|
| 663 | switchStmt->get_condition()->accept( *this ); |
---|
| 664 | output << " ) "; |
---|
[71f4e4f] | 665 | |
---|
[2b6c1e0] | 666 | output << "{" << std::endl; |
---|
[6c4ff37] | 667 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 668 | |
---|
[6c4ff37] | 669 | acceptAll( switchStmt->get_branches(), *this ); |
---|
[51587aa] | 670 | |
---|
[6c4ff37] | 671 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 672 | |
---|
[cda48b6] | 673 | output << indent << "}"; |
---|
[51587aa] | 674 | } |
---|
| 675 | |
---|
[6c4ff37] | 676 | void CodeGenerator::visit( CaseStmt *caseStmt ) { |
---|
[cda48b6] | 677 | output << indent; |
---|
[eb3261f] | 678 | if ( caseStmt->isDefault()) { |
---|
[2b6c1e0] | 679 | output << "default"; |
---|
[eb3261f] | 680 | } else { |
---|
[2b6c1e0] | 681 | output << "case "; |
---|
[7f5566b] | 682 | caseStmt->get_condition()->accept( *this ); |
---|
[17cd4eb] | 683 | } // if |
---|
[6c4ff37] | 684 | output << ":\n"; |
---|
[71f4e4f] | 685 | |
---|
[51587aa] | 686 | std::list<Statement *> sts = caseStmt->get_statements(); |
---|
| 687 | |
---|
[6c4ff37] | 688 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 689 | for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) { |
---|
[cda48b6] | 690 | output << indent << printLabels( (*i)->get_labels() ) ; |
---|
[7f5566b] | 691 | (*i)->accept( *this ); |
---|
[6c4ff37] | 692 | output << endl; |
---|
[51587aa] | 693 | } |
---|
[6c4ff37] | 694 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 695 | } |
---|
| 696 | |
---|
[6c4ff37] | 697 | void CodeGenerator::visit( BranchStmt *branchStmt ) { |
---|
[51587aa] | 698 | switch ( branchStmt->get_type()) { |
---|
| 699 | case BranchStmt::Goto: |
---|
| 700 | if ( ! branchStmt->get_target().empty() ) |
---|
[6c4ff37] | 701 | output << "goto " << branchStmt->get_target(); |
---|
[71f4e4f] | 702 | else { |
---|
[51587aa] | 703 | if ( branchStmt->get_computedTarget() != 0 ) { |
---|
[6c4ff37] | 704 | output << "goto *"; |
---|
[51587aa] | 705 | branchStmt->get_computedTarget()->accept( *this ); |
---|
| 706 | } // if |
---|
| 707 | } // if |
---|
| 708 | break; |
---|
| 709 | case BranchStmt::Break: |
---|
[6c4ff37] | 710 | output << "break"; |
---|
[51587aa] | 711 | break; |
---|
| 712 | case BranchStmt::Continue: |
---|
[6c4ff37] | 713 | output << "continue"; |
---|
[51587aa] | 714 | break; |
---|
| 715 | } |
---|
[2b6c1e0] | 716 | output << ";"; |
---|
[51587aa] | 717 | } |
---|
| 718 | |
---|
| 719 | |
---|
[6c4ff37] | 720 | void CodeGenerator::visit( ReturnStmt *returnStmt ) { |
---|
| 721 | output << "return "; |
---|
[51587aa] | 722 | |
---|
| 723 | // xxx -- check for null expression; |
---|
| 724 | if ( returnStmt->get_expr() ) { |
---|
| 725 | returnStmt->get_expr()->accept( *this ); |
---|
| 726 | } // if |
---|
[6c4ff37] | 727 | output << ";"; |
---|
[51587aa] | 728 | } |
---|
| 729 | |
---|
[6c4ff37] | 730 | void CodeGenerator::visit( WhileStmt *whileStmt ) { |
---|
[321a2481] | 731 | if ( whileStmt->get_isDoWhile() ) { |
---|
[6c4ff37] | 732 | output << "do" ; |
---|
[321a2481] | 733 | } else { |
---|
[6c4ff37] | 734 | output << "while (" ; |
---|
[7f5566b] | 735 | whileStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 736 | output << ")"; |
---|
[51587aa] | 737 | } // if |
---|
[2b6c1e0] | 738 | output << " "; |
---|
[51587aa] | 739 | |
---|
[2b6c1e0] | 740 | output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() ); |
---|
[51587aa] | 741 | whileStmt->get_body()->accept( *this ); |
---|
| 742 | |
---|
[cda48b6] | 743 | output << indent; |
---|
[51587aa] | 744 | |
---|
| 745 | if ( whileStmt->get_isDoWhile() ) { |
---|
[6c4ff37] | 746 | output << " while (" ; |
---|
[7f5566b] | 747 | whileStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 748 | output << ");"; |
---|
[51587aa] | 749 | } // if |
---|
| 750 | } |
---|
| 751 | |
---|
[6c4ff37] | 752 | void CodeGenerator::visit( ForStmt *forStmt ) { |
---|
[71f4e4f] | 753 | // initialization is always hoisted, so don't |
---|
| 754 | // bother doing anything with that |
---|
[145f1fc] | 755 | output << "for (;"; |
---|
[51587aa] | 756 | |
---|
[321a2481] | 757 | if ( forStmt->get_condition() != 0 ) { |
---|
[51587aa] | 758 | forStmt->get_condition()->accept( *this ); |
---|
[321a2481] | 759 | } |
---|
[6c4ff37] | 760 | output << ";"; |
---|
[51587aa] | 761 | |
---|
[321a2481] | 762 | if ( forStmt->get_increment() != 0 ) { |
---|
| 763 | // cast the top-level expression to void to reduce gcc warnings. |
---|
| 764 | Expression * expr = new CastExpr( forStmt->get_increment() ); |
---|
| 765 | expr->accept( *this ); |
---|
| 766 | } |
---|
[2b6c1e0] | 767 | output << ") "; |
---|
[51587aa] | 768 | |
---|
| 769 | if ( forStmt->get_body() != 0 ) { |
---|
[2b6c1e0] | 770 | output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() ); |
---|
[51587aa] | 771 | forStmt->get_body()->accept( *this ); |
---|
| 772 | } // if |
---|
| 773 | } |
---|
| 774 | |
---|
[6c4ff37] | 775 | void CodeGenerator::visit( NullStmt *nullStmt ) { |
---|
[cda48b6] | 776 | //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() ); |
---|
[6c4ff37] | 777 | output << "/* null statement */ ;"; |
---|
[51587aa] | 778 | } |
---|
| 779 | |
---|
[6c4ff37] | 780 | void CodeGenerator::visit( DeclStmt *declStmt ) { |
---|
[51587aa] | 781 | declStmt->get_decl()->accept( *this ); |
---|
[71f4e4f] | 782 | |
---|
[51587aa] | 783 | if ( doSemicolon( declStmt->get_decl() ) ) { |
---|
[6c4ff37] | 784 | output << ";"; |
---|
[51587aa] | 785 | } // if |
---|
| 786 | } |
---|
| 787 | |
---|
[6c4ff37] | 788 | std::string CodeGenerator::printLabels( std::list< Label > &l ) { |
---|
[51587aa] | 789 | std::string str( "" ); |
---|
[6c4ff37] | 790 | l.unique(); // assumes a sorted list. Why not use set? |
---|
[51587aa] | 791 | |
---|
| 792 | for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ ) |
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| 793 | str += *i + ": "; |
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| 794 | |
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| 795 | return str; |
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| 796 | } |
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| 797 | |
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[6c4ff37] | 798 | void CodeGenerator::handleStorageClass( Declaration *decl ) { |
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[51587aa] | 799 | switch ( decl->get_storageClass() ) { |
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[68cd1ce] | 800 | case DeclarationNode::Extern: |
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[6c4ff37] | 801 | output << "extern "; |
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[51587aa] | 802 | break; |
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[68cd1ce] | 803 | case DeclarationNode::Static: |
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[6c4ff37] | 804 | output << "static "; |
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[51587aa] | 805 | break; |
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[68cd1ce] | 806 | case DeclarationNode::Auto: |
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[51587aa] | 807 | // silently drop storage class |
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| 808 | break; |
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[68cd1ce] | 809 | case DeclarationNode::Register: |
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[6c4ff37] | 810 | output << "register "; |
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[51587aa] | 811 | break; |
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[68cd1ce] | 812 | case DeclarationNode::Inline: |
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[de62360d] | 813 | output << "inline "; |
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[f38c8d9] | 814 | break; |
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[68cd1ce] | 815 | case DeclarationNode::Fortran: |
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| 816 | output << "fortran "; |
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| 817 | break; |
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| 818 | case DeclarationNode::Noreturn: |
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| 819 | output << "_Noreturn "; |
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| 820 | break; |
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| 821 | case DeclarationNode::Threadlocal: |
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| 822 | output << "_Thread_local "; |
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| 823 | break; |
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| 824 | case DeclarationNode::NoStorageClass: |
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[f38c8d9] | 825 | break; |
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[843054c2] | 826 | } // switch |
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[51587aa] | 827 | } |
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[51b7345] | 828 | } // namespace CodeGen |
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[51587aa] | 829 | |
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| 830 | // Local Variables: // |
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| 831 | // tab-width: 4 // |
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| 832 | // mode: c++ // |
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| 833 | // compile-command: "make install" // |
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| 834 | // End: // |
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