[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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[51b7345] | 28 | |
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[d3b7937] | 29 | #include "Common/utility.h" |
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| 30 | #include "Common/UnimplementedError.h" |
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[51b7345] | 31 | |
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[a61fea9a] | 32 | #include "CodeGenerator.h" |
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[51b7345] | 33 | #include "OperatorTable.h" |
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| 34 | #include "GenType.h" |
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| 35 | |
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| 36 | using namespace std; |
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| 37 | |
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| 38 | namespace CodeGen { |
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[6c4ff37] | 39 | int CodeGenerator::tabsize = 4; |
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[51587aa] | 40 | |
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[145f1fc] | 41 | // the kinds of statements that would ideally be followed by whitespace |
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[2b6c1e0] | 42 | bool wantSpacing( Statement * stmt) { |
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| 43 | return dynamic_cast< IfStmt * >( stmt ) || dynamic_cast< CompoundStmt * >( stmt ) || |
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| 44 | dynamic_cast< WhileStmt * >( stmt ) || dynamic_cast< ForStmt * > ( stmt ) || dynamic_cast< SwitchStmt *>( stmt ); |
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| 45 | } |
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| 46 | |
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[cda48b6] | 47 | ostream & CodeGenerator::Indenter::operator()( ostream & output ) { |
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| 48 | return output << string( cg.cur_indent, ' ' ); |
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| 49 | } |
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| 50 | |
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| 51 | ostream & operator<<( ostream & output, CodeGenerator::Indenter &indent ) { |
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| 52 | return indent( output ); |
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| 53 | } |
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[51587aa] | 54 | |
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[7f5566b] | 55 | CodeGenerator::CodeGenerator( std::ostream &os ) : indent( *this), cur_indent( 0 ), insideFunction( false ), output( os ) { } |
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[cda48b6] | 56 | |
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| 57 | CodeGenerator::CodeGenerator( std::ostream &os, std::string init, int indentation, bool infunp ) |
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[7f5566b] | 58 | : indent( *this), cur_indent( indentation ), insideFunction( infunp ), output( os ) { |
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[6c4ff37] | 59 | //output << std::string( init ); |
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[51587aa] | 60 | } |
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| 61 | |
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[cda48b6] | 62 | CodeGenerator::CodeGenerator( std::ostream &os, char *init, int indentation, bool infunp ) |
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[7f5566b] | 63 | : indent( *this ), cur_indent( indentation ), insideFunction( infunp ), output( os ) { |
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[6c4ff37] | 64 | //output << std::string( init ); |
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[51587aa] | 65 | } |
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| 66 | |
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| 67 | string mangleName( DeclarationWithType *decl ) { |
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| 68 | if ( decl->get_mangleName() != "" ) { |
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[f326f99] | 69 | // need to incorporate scope level in order to differentiate names for destructors |
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| 70 | return decl->get_scopedMangleName(); |
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[51587aa] | 71 | } else { |
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| 72 | return decl->get_name(); |
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| 73 | } // if |
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| 74 | } |
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[94b4364] | 75 | |
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[51587aa] | 76 | //*** Declarations |
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[6c4ff37] | 77 | void CodeGenerator::visit( FunctionDecl *functionDecl ) { |
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[4e24610] | 78 | // generalize this |
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[03e5d14] | 79 | FunctionDecl::Attribute attr = functionDecl->get_attribute(); |
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| 80 | switch ( attr.type ) { |
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| 81 | case FunctionDecl::Attribute::Constructor: |
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| 82 | output << "__attribute__ ((constructor"; |
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| 83 | if ( attr.priority != FunctionDecl::Attribute::Default ) { |
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| 84 | output << "(" << attr.priority << ")"; |
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| 85 | } |
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| 86 | output << ")) "; |
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[4e24610] | 87 | break; |
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[03e5d14] | 88 | case FunctionDecl::Attribute::Destructor: |
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| 89 | output << "__attribute__ ((destructor"; |
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| 90 | if ( attr.priority != FunctionDecl::Attribute::Default ) { |
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| 91 | output << "(" << attr.priority << ")"; |
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| 92 | } |
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| 93 | output << ")) "; |
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[4e24610] | 94 | break; |
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| 95 | default: |
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| 96 | break; |
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| 97 | } |
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[51587aa] | 98 | handleStorageClass( functionDecl ); |
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[f38c8d9] | 99 | if ( functionDecl->get_isInline() ) { |
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[6c4ff37] | 100 | output << "inline "; |
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[f38c8d9] | 101 | } // if |
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[de62360d] | 102 | if ( functionDecl->get_isNoreturn() ) { |
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| 103 | output << "_Noreturn "; |
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| 104 | } // if |
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[6c4ff37] | 105 | output << genType( functionDecl->get_functionType(), mangleName( functionDecl ) ); |
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[51587aa] | 106 | |
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| 107 | // how to get this to the Functype? |
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| 108 | std::list< Declaration * > olds = functionDecl->get_oldDecls(); |
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| 109 | if ( ! olds.empty() ) { |
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[6c4ff37] | 110 | output << " /* function has old declaration */"; |
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[51587aa] | 111 | } // if |
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| 112 | |
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| 113 | // acceptAll( functionDecl->get_oldDecls(), *this ); |
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| 114 | if ( functionDecl->get_statements() ) { |
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[7f5566b] | 115 | functionDecl->get_statements()->accept( *this ); |
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[51587aa] | 116 | } // if |
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| 117 | } |
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| 118 | |
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[6c4ff37] | 119 | void CodeGenerator::visit( ObjectDecl *objectDecl ) { |
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[51587aa] | 120 | handleStorageClass( objectDecl ); |
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[6c4ff37] | 121 | output << genType( objectDecl->get_type(), mangleName( objectDecl ) ); |
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[71f4e4f] | 122 | |
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[51587aa] | 123 | if ( objectDecl->get_init() ) { |
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[6c4ff37] | 124 | output << " = "; |
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[51587aa] | 125 | objectDecl->get_init()->accept( *this ); |
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| 126 | } // if |
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| 127 | if ( objectDecl->get_bitfieldWidth() ) { |
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[6c4ff37] | 128 | output << ":"; |
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[51587aa] | 129 | objectDecl->get_bitfieldWidth()->accept( *this ); |
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| 130 | } // if |
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| 131 | } |
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| 132 | |
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[6c4ff37] | 133 | void CodeGenerator::handleAggregate( AggregateDecl *aggDecl ) { |
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[51587aa] | 134 | if ( aggDecl->get_name() != "" ) |
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[6c4ff37] | 135 | output << aggDecl->get_name(); |
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[71f4e4f] | 136 | |
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[51587aa] | 137 | std::list< Declaration * > &memb = aggDecl->get_members(); |
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| 138 | |
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| 139 | if ( ! memb.empty() ) { |
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[94b4364] | 140 | output << " {" << endl; |
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[51587aa] | 141 | |
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[71f4e4f] | 142 | cur_indent += CodeGenerator::tabsize; |
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[51587aa] | 143 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) { |
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[71f4e4f] | 144 | output << indent; |
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[7f5566b] | 145 | (*i)->accept( *this ); |
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[6c4ff37] | 146 | output << ";" << endl; |
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[51587aa] | 147 | } |
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| 148 | |
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[71f4e4f] | 149 | cur_indent -= CodeGenerator::tabsize; |
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[51587aa] | 150 | |
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[cda48b6] | 151 | output << indent << "}"; |
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[17cd4eb] | 152 | } // if |
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[51587aa] | 153 | } |
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[17cd4eb] | 154 | |
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[6c4ff37] | 155 | void CodeGenerator::visit( StructDecl *structDecl ) { |
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| 156 | output << "struct "; |
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[51587aa] | 157 | handleAggregate( structDecl ); |
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| 158 | } |
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[17cd4eb] | 159 | |
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[6c4ff37] | 160 | void CodeGenerator::visit( UnionDecl *aggregateDecl ) { |
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| 161 | output << "union "; |
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[51587aa] | 162 | handleAggregate( aggregateDecl ); |
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| 163 | } |
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[71f4e4f] | 164 | |
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[6c4ff37] | 165 | void CodeGenerator::visit( EnumDecl *aggDecl ) { |
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| 166 | output << "enum "; |
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[51587aa] | 167 | |
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| 168 | if ( aggDecl->get_name() != "" ) |
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[6c4ff37] | 169 | output << aggDecl->get_name(); |
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[71f4e4f] | 170 | |
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[51587aa] | 171 | std::list< Declaration* > &memb = aggDecl->get_members(); |
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| 172 | |
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| 173 | if ( ! memb.empty() ) { |
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[cda48b6] | 174 | output << " {" << endl; |
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[51587aa] | 175 | |
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[71f4e4f] | 176 | cur_indent += CodeGenerator::tabsize; |
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[51587aa] | 177 | for ( std::list< Declaration* >::iterator i = memb.begin(); i != memb.end(); i++) { |
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| 178 | ObjectDecl *obj = dynamic_cast< ObjectDecl* >( *i ); |
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| 179 | assert( obj ); |
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[71f4e4f] | 180 | output << indent << mangleName( obj ); |
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[51587aa] | 181 | if ( obj->get_init() ) { |
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[6c4ff37] | 182 | output << " = "; |
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[7f5566b] | 183 | obj->get_init()->accept( *this ); |
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[51587aa] | 184 | } // if |
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[6c4ff37] | 185 | output << "," << endl; |
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[51587aa] | 186 | } // for |
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| 187 | |
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[71f4e4f] | 188 | cur_indent -= CodeGenerator::tabsize; |
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[51587aa] | 189 | |
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[cda48b6] | 190 | output << indent << "}"; |
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[51587aa] | 191 | } // if |
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| 192 | } |
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[71f4e4f] | 193 | |
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[4040425] | 194 | void CodeGenerator::visit( TraitDecl *aggregateDecl ) {} |
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[71f4e4f] | 195 | |
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[6c4ff37] | 196 | void CodeGenerator::visit( TypedefDecl *typeDecl ) { |
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| 197 | output << "typedef "; |
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| 198 | output << genType( typeDecl->get_base(), typeDecl->get_name() ); |
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[51587aa] | 199 | } |
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[71f4e4f] | 200 | |
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[6c4ff37] | 201 | void CodeGenerator::visit( TypeDecl *typeDecl ) { |
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[51587aa] | 202 | // really, we should mutate this into something that isn't a TypeDecl but that requires large-scale changes, |
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| 203 | // still to be done |
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[6c4ff37] | 204 | output << "extern unsigned long " << typeDecl->get_name(); |
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[51587aa] | 205 | if ( typeDecl->get_base() ) { |
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[6c4ff37] | 206 | output << " = sizeof( " << genType( typeDecl->get_base(), "" ) << " )"; |
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[51587aa] | 207 | } // if |
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| 208 | } |
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| 209 | |
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[e45215c] | 210 | void CodeGenerator::printDesignators( std::list< Expression * > & designators ) { |
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| 211 | typedef std::list< Expression * > DesignatorList; |
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| 212 | if ( designators.size() == 0 ) return; |
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| 213 | for ( DesignatorList::iterator iter = designators.begin(); iter != designators.end(); ++iter ) { |
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[8a4da06] | 214 | if ( dynamic_cast< NameExpr * >( *iter ) ) { |
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[f32c7f4] | 215 | // if expression is a name, then initializing aggregate member |
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| 216 | output << "."; |
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| 217 | (*iter)->accept( *this ); |
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| 218 | } else { |
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| 219 | // if not a simple name, it has to be a constant expression, i.e. an array designator |
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[e45215c] | 220 | output << "["; |
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| 221 | (*iter)->accept( *this ); |
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| 222 | output << "]"; |
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| 223 | } |
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| 224 | } |
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| 225 | output << " = "; |
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| 226 | } |
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| 227 | |
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[6c4ff37] | 228 | void CodeGenerator::visit( SingleInit *init ) { |
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[e45215c] | 229 | printDesignators( init->get_designators() ); |
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[51587aa] | 230 | init->get_value()->accept( *this ); |
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| 231 | } |
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| 232 | |
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[6c4ff37] | 233 | void CodeGenerator::visit( ListInit *init ) { |
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[e45215c] | 234 | printDesignators( init->get_designators() ); |
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[6c4ff37] | 235 | output << "{ "; |
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[5b40f30] | 236 | if ( init->begin_initializers() == init->end_initializers() ) { |
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| 237 | // illegal to leave initializer list empty for scalar initializers, |
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| 238 | // but always legal to have 0 |
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| 239 | output << "0"; |
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| 240 | } else { |
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| 241 | genCommaList( init->begin_initializers(), init->end_initializers() ); |
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| 242 | } |
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[6c4ff37] | 243 | output << " }"; |
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[51587aa] | 244 | } |
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| 245 | |
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[71f4e4f] | 246 | void CodeGenerator::visit( Constant *constant ) { |
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[6c4ff37] | 247 | output << constant->get_value() ; |
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[51587aa] | 248 | } |
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| 249 | |
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| 250 | //*** Expressions |
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[6c4ff37] | 251 | void CodeGenerator::visit( ApplicationExpr *applicationExpr ) { |
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[51587aa] | 252 | if ( VariableExpr *varExpr = dynamic_cast< VariableExpr* >( applicationExpr->get_function() ) ) { |
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| 253 | OperatorInfo opInfo; |
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| 254 | if ( varExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( varExpr->get_var()->get_name(), opInfo ) ) { |
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| 255 | std::list< Expression* >::iterator arg = applicationExpr->get_args().begin(); |
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| 256 | switch ( opInfo.type ) { |
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| 257 | case OT_PREFIXASSIGN: |
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| 258 | case OT_POSTFIXASSIGN: |
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| 259 | case OT_INFIXASSIGN: |
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[356189a] | 260 | case OT_CTOR: |
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[c2ce2350] | 261 | case OT_DTOR: |
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[51587aa] | 262 | { |
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| 263 | assert( arg != applicationExpr->get_args().end() ); |
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| 264 | if ( AddressExpr *addrExpr = dynamic_cast< AddressExpr * >( *arg ) ) { |
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[356189a] | 265 | // remove & from first assignment/ctor argument |
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[51587aa] | 266 | *arg = addrExpr->get_arg(); |
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| 267 | } else { |
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[356189a] | 268 | // no address-of operator, so must be a pointer - add dereference |
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[51587aa] | 269 | UntypedExpr *newExpr = new UntypedExpr( new NameExpr( "*?" ) ); |
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| 270 | newExpr->get_args().push_back( *arg ); |
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| 271 | *arg = newExpr; |
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| 272 | } // if |
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| 273 | break; |
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| 274 | } |
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[71f4e4f] | 275 | |
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[51587aa] | 276 | default: |
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| 277 | // do nothing |
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| 278 | ; |
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| 279 | } |
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[71f4e4f] | 280 | |
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[51587aa] | 281 | switch ( opInfo.type ) { |
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| 282 | case OT_INDEX: |
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| 283 | assert( applicationExpr->get_args().size() == 2 ); |
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| 284 | (*arg++)->accept( *this ); |
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[6c4ff37] | 285 | output << "["; |
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[51587aa] | 286 | (*arg)->accept( *this ); |
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[6c4ff37] | 287 | output << "]"; |
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[51587aa] | 288 | break; |
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[71f4e4f] | 289 | |
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[51587aa] | 290 | case OT_CALL: |
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[356189a] | 291 | // there are no intrinsic definitions of the function call operator |
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[51587aa] | 292 | assert( false ); |
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| 293 | break; |
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[71f4e4f] | 294 | |
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[f1e012b] | 295 | case OT_CTOR: |
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[c2ce2350] | 296 | case OT_DTOR: |
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[356189a] | 297 | if ( applicationExpr->get_args().size() == 1 ) { |
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[c2ce2350] | 298 | // the expression fed into a single parameter constructor or destructor |
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| 299 | // may contain side effects - output as a void expression |
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[356189a] | 300 | output << "((void)("; |
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| 301 | (*arg++)->accept( *this ); |
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[c2ce2350] | 302 | output << ")) /* " << opInfo.inputName << " */"; |
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[356189a] | 303 | } else if ( applicationExpr->get_args().size() == 2 ) { |
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[c2ce2350] | 304 | // intrinsic two parameter constructors are essentially bitwise assignment |
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[356189a] | 305 | output << "("; |
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| 306 | (*arg++)->accept( *this ); |
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| 307 | output << opInfo.symbol; |
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| 308 | (*arg)->accept( *this ); |
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[c2ce2350] | 309 | output << ") /* " << opInfo.inputName << " */"; |
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[356189a] | 310 | } else { |
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[c2ce2350] | 311 | // no constructors with 0 or more than 2 parameters |
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[356189a] | 312 | assert( false ); |
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| 313 | } |
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| 314 | break; |
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[f1e012b] | 315 | |
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[51587aa] | 316 | case OT_PREFIX: |
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| 317 | case OT_PREFIXASSIGN: |
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| 318 | assert( applicationExpr->get_args().size() == 1 ); |
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[6c4ff37] | 319 | output << "("; |
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| 320 | output << opInfo.symbol; |
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[51587aa] | 321 | (*arg)->accept( *this ); |
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[6c4ff37] | 322 | output << ")"; |
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[51587aa] | 323 | break; |
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[71f4e4f] | 324 | |
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[51587aa] | 325 | case OT_POSTFIX: |
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| 326 | case OT_POSTFIXASSIGN: |
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| 327 | assert( applicationExpr->get_args().size() == 1 ); |
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| 328 | (*arg)->accept( *this ); |
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[6c4ff37] | 329 | output << opInfo.symbol; |
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[51587aa] | 330 | break; |
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| 331 | |
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[f1e012b] | 332 | |
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[51587aa] | 333 | case OT_INFIX: |
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| 334 | case OT_INFIXASSIGN: |
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| 335 | assert( applicationExpr->get_args().size() == 2 ); |
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[6c4ff37] | 336 | output << "("; |
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[51587aa] | 337 | (*arg++)->accept( *this ); |
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[6c4ff37] | 338 | output << opInfo.symbol; |
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[51587aa] | 339 | (*arg)->accept( *this ); |
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[6c4ff37] | 340 | output << ")"; |
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[51587aa] | 341 | break; |
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[71f4e4f] | 342 | |
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[51587aa] | 343 | case OT_CONSTANT: |
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[721f17a] | 344 | case OT_LABELADDRESS: |
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| 345 | // there are no intrinsic definitions of 0/1 or label addresses as functions |
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[51587aa] | 346 | assert( false ); |
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| 347 | } |
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[17cd4eb] | 348 | } else { |
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[51587aa] | 349 | varExpr->accept( *this ); |
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[6c4ff37] | 350 | output << "("; |
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[51587aa] | 351 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
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[6c4ff37] | 352 | output << ")"; |
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[17cd4eb] | 353 | } // if |
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[51587aa] | 354 | } else { |
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| 355 | applicationExpr->get_function()->accept( *this ); |
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[6c4ff37] | 356 | output << "("; |
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[51587aa] | 357 | genCommaList( applicationExpr->get_args().begin(), applicationExpr->get_args().end() ); |
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[6c4ff37] | 358 | output << ")"; |
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[51587aa] | 359 | } // if |
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| 360 | } |
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[71f4e4f] | 361 | |
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[6c4ff37] | 362 | void CodeGenerator::visit( UntypedExpr *untypedExpr ) { |
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[51587aa] | 363 | if ( NameExpr *nameExpr = dynamic_cast< NameExpr* >( untypedExpr->get_function() ) ) { |
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| 364 | OperatorInfo opInfo; |
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| 365 | if ( operatorLookup( nameExpr->get_name(), opInfo ) ) { |
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| 366 | std::list< Expression* >::iterator arg = untypedExpr->get_args().begin(); |
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| 367 | switch ( opInfo.type ) { |
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| 368 | case OT_INDEX: |
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| 369 | assert( untypedExpr->get_args().size() == 2 ); |
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| 370 | (*arg++)->accept( *this ); |
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[6c4ff37] | 371 | output << "["; |
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[51587aa] | 372 | (*arg)->accept( *this ); |
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[6c4ff37] | 373 | output << "]"; |
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[51587aa] | 374 | break; |
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[71f4e4f] | 375 | |
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[51587aa] | 376 | case OT_CALL: |
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[f1e012b] | 377 | assert( false ); |
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| 378 | |
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[c2ce2350] | 379 | |
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| 380 | case OT_CTOR: |
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| 381 | case OT_DTOR: |
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| 382 | if ( untypedExpr->get_args().size() == 1 ) { |
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| 383 | // the expression fed into a single parameter constructor or destructor |
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| 384 | // may contain side effects - output as a void expression |
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| 385 | output << "((void)("; |
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| 386 | (*arg++)->accept( *this ); |
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| 387 | output << ")) /* " << opInfo.inputName << " */"; |
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| 388 | } else if ( untypedExpr->get_args().size() == 2 ) { |
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| 389 | // intrinsic two parameter constructors are essentially bitwise assignment |
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| 390 | output << "("; |
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| 391 | (*arg++)->accept( *this ); |
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| 392 | output << opInfo.symbol; |
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| 393 | (*arg)->accept( *this ); |
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| 394 | output << ") /* " << opInfo.inputName << " */"; |
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| 395 | } else { |
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| 396 | // no constructors with 0 or more than 2 parameters |
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| 397 | assert( false ); |
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| 398 | } |
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[51587aa] | 399 | break; |
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[71f4e4f] | 400 | |
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[51587aa] | 401 | case OT_PREFIX: |
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| 402 | case OT_PREFIXASSIGN: |
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[de62360d] | 403 | case OT_LABELADDRESS: |
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[51587aa] | 404 | assert( untypedExpr->get_args().size() == 1 ); |
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[6c4ff37] | 405 | output << "("; |
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| 406 | output << opInfo.symbol; |
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[51587aa] | 407 | (*arg)->accept( *this ); |
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[6c4ff37] | 408 | output << ")"; |
---|
[51587aa] | 409 | break; |
---|
[71f4e4f] | 410 | |
---|
[51587aa] | 411 | case OT_POSTFIX: |
---|
| 412 | case OT_POSTFIXASSIGN: |
---|
| 413 | assert( untypedExpr->get_args().size() == 1 ); |
---|
| 414 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 415 | output << opInfo.symbol; |
---|
[51587aa] | 416 | break; |
---|
[71f4e4f] | 417 | |
---|
[51587aa] | 418 | case OT_INFIX: |
---|
| 419 | case OT_INFIXASSIGN: |
---|
| 420 | assert( untypedExpr->get_args().size() == 2 ); |
---|
[6c4ff37] | 421 | output << "("; |
---|
[51587aa] | 422 | (*arg++)->accept( *this ); |
---|
[6c4ff37] | 423 | output << opInfo.symbol; |
---|
[51587aa] | 424 | (*arg)->accept( *this ); |
---|
[6c4ff37] | 425 | output << ")"; |
---|
[51587aa] | 426 | break; |
---|
[71f4e4f] | 427 | |
---|
[51587aa] | 428 | case OT_CONSTANT: |
---|
| 429 | // there are no intrinsic definitions of 0 or 1 as functions |
---|
| 430 | assert( false ); |
---|
| 431 | } |
---|
| 432 | } else { |
---|
| 433 | nameExpr->accept( *this ); |
---|
[6c4ff37] | 434 | output << "("; |
---|
[51587aa] | 435 | genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() ); |
---|
[6c4ff37] | 436 | output << ")"; |
---|
[51587aa] | 437 | } // if |
---|
| 438 | } else { |
---|
| 439 | untypedExpr->get_function()->accept( *this ); |
---|
[6c4ff37] | 440 | output << "("; |
---|
[51587aa] | 441 | genCommaList( untypedExpr->get_args().begin(), untypedExpr->get_args().end() ); |
---|
[6c4ff37] | 442 | output << ")"; |
---|
[51587aa] | 443 | } // if |
---|
| 444 | } |
---|
[71f4e4f] | 445 | |
---|
[6c4ff37] | 446 | void CodeGenerator::visit( NameExpr *nameExpr ) { |
---|
[51587aa] | 447 | OperatorInfo opInfo; |
---|
| 448 | if ( operatorLookup( nameExpr->get_name(), opInfo ) ) { |
---|
| 449 | assert( opInfo.type == OT_CONSTANT ); |
---|
[6c4ff37] | 450 | output << opInfo.symbol; |
---|
[51587aa] | 451 | } else { |
---|
[6c4ff37] | 452 | output << nameExpr->get_name(); |
---|
[51587aa] | 453 | } // if |
---|
| 454 | } |
---|
[71f4e4f] | 455 | |
---|
[6c4ff37] | 456 | void CodeGenerator::visit( AddressExpr *addressExpr ) { |
---|
| 457 | output << "(&"; |
---|
[51587aa] | 458 | // this hack makes sure that we don't convert "constant_zero" to "0" if we're taking its address |
---|
| 459 | if ( VariableExpr *variableExpr = dynamic_cast< VariableExpr* >( addressExpr->get_arg() ) ) { |
---|
[6c4ff37] | 460 | output << mangleName( variableExpr->get_var() ); |
---|
[51587aa] | 461 | } else { |
---|
| 462 | addressExpr->get_arg()->accept( *this ); |
---|
| 463 | } // if |
---|
[6c4ff37] | 464 | output << ")"; |
---|
[51587aa] | 465 | } |
---|
| 466 | |
---|
[6c4ff37] | 467 | void CodeGenerator::visit( CastExpr *castExpr ) { |
---|
[803deb1] | 468 | output << "("; |
---|
| 469 | if ( castExpr->get_results().empty() ) { |
---|
| 470 | output << "(void)" ; |
---|
| 471 | } else if ( ! castExpr->get_results().front()->get_isLvalue() ) { |
---|
| 472 | // at least one result type of cast, but not an lvalue |
---|
| 473 | output << "("; |
---|
| 474 | output << genType( castExpr->get_results().front(), "" ); |
---|
[71f4e4f] | 475 | output << ")"; |
---|
[803deb1] | 476 | } else { |
---|
| 477 | // otherwise, the cast is to an lvalue type, so the cast |
---|
| 478 | // should be dropped, since the result of a cast is |
---|
| 479 | // never an lvalue in C |
---|
[76b48f1] | 480 | } |
---|
[803deb1] | 481 | castExpr->get_arg()->accept( *this ); |
---|
| 482 | output << ")"; |
---|
[51587aa] | 483 | } |
---|
[71f4e4f] | 484 | |
---|
[6c4ff37] | 485 | void CodeGenerator::visit( UntypedMemberExpr *memberExpr ) { |
---|
[51587aa] | 486 | assert( false ); |
---|
| 487 | } |
---|
[71f4e4f] | 488 | |
---|
[6c4ff37] | 489 | void CodeGenerator::visit( MemberExpr *memberExpr ) { |
---|
[51587aa] | 490 | memberExpr->get_aggregate()->accept( *this ); |
---|
[6c4ff37] | 491 | output << "." << mangleName( memberExpr->get_member() ); |
---|
[51587aa] | 492 | } |
---|
[71f4e4f] | 493 | |
---|
[6c4ff37] | 494 | void CodeGenerator::visit( VariableExpr *variableExpr ) { |
---|
[51587aa] | 495 | OperatorInfo opInfo; |
---|
| 496 | if ( variableExpr->get_var()->get_linkage() == LinkageSpec::Intrinsic && operatorLookup( variableExpr->get_var()->get_name(), opInfo ) && opInfo.type == OT_CONSTANT ) { |
---|
[6c4ff37] | 497 | output << opInfo.symbol; |
---|
[51587aa] | 498 | } else { |
---|
[6c4ff37] | 499 | output << mangleName( variableExpr->get_var() ); |
---|
[51587aa] | 500 | } // if |
---|
| 501 | } |
---|
[71f4e4f] | 502 | |
---|
[6c4ff37] | 503 | void CodeGenerator::visit( ConstantExpr *constantExpr ) { |
---|
[51587aa] | 504 | assert( constantExpr->get_constant() ); |
---|
| 505 | constantExpr->get_constant()->accept( *this ); |
---|
| 506 | } |
---|
[71f4e4f] | 507 | |
---|
[6c4ff37] | 508 | void CodeGenerator::visit( SizeofExpr *sizeofExpr ) { |
---|
| 509 | output << "sizeof("; |
---|
[51587aa] | 510 | if ( sizeofExpr->get_isType() ) { |
---|
[6c4ff37] | 511 | output << genType( sizeofExpr->get_type(), "" ); |
---|
[51587aa] | 512 | } else { |
---|
| 513 | sizeofExpr->get_expr()->accept( *this ); |
---|
| 514 | } // if |
---|
[6c4ff37] | 515 | output << ")"; |
---|
[51587aa] | 516 | } |
---|
[47534159] | 517 | |
---|
[25a054f] | 518 | void CodeGenerator::visit( AlignofExpr *alignofExpr ) { |
---|
[47534159] | 519 | // use GCC extension to avoid bumping std to C11 |
---|
| 520 | output << "__alignof__("; |
---|
[25a054f] | 521 | if ( alignofExpr->get_isType() ) { |
---|
| 522 | output << genType( alignofExpr->get_type(), "" ); |
---|
[47534159] | 523 | } else { |
---|
[25a054f] | 524 | alignofExpr->get_expr()->accept( *this ); |
---|
[47534159] | 525 | } // if |
---|
| 526 | output << ")"; |
---|
| 527 | } |
---|
[71f4e4f] | 528 | |
---|
[2a4b088] | 529 | void CodeGenerator::visit( UntypedOffsetofExpr *offsetofExpr ) { |
---|
[afc1045] | 530 | assert( false && "UntypedOffsetofExpr should not reach code generation" ); |
---|
[2a4b088] | 531 | } |
---|
| 532 | |
---|
[25a054f] | 533 | void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) { |
---|
| 534 | // use GCC builtin |
---|
| 535 | output << "__builtin_offsetof("; |
---|
| 536 | output << genType( offsetofExpr->get_type(), "" ); |
---|
[e551c69] | 537 | output << ", " << mangleName( offsetofExpr->get_member() ); |
---|
[25a054f] | 538 | output << ")"; |
---|
| 539 | } |
---|
[d63eeb0] | 540 | |
---|
[afc1045] | 541 | void CodeGenerator::visit( OffsetPackExpr *offsetPackExpr ) { |
---|
| 542 | assert( false && "OffsetPackExpr should not reach code generation" ); |
---|
| 543 | } |
---|
[70a06f6] | 544 | |
---|
[6c4ff37] | 545 | void CodeGenerator::visit( LogicalExpr *logicalExpr ) { |
---|
| 546 | output << "("; |
---|
[51587aa] | 547 | logicalExpr->get_arg1()->accept( *this ); |
---|
| 548 | if ( logicalExpr->get_isAnd() ) { |
---|
[6c4ff37] | 549 | output << " && "; |
---|
[51587aa] | 550 | } else { |
---|
[6c4ff37] | 551 | output << " || "; |
---|
[51587aa] | 552 | } // if |
---|
| 553 | logicalExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 554 | output << ")"; |
---|
[51587aa] | 555 | } |
---|
[71f4e4f] | 556 | |
---|
[6c4ff37] | 557 | void CodeGenerator::visit( ConditionalExpr *conditionalExpr ) { |
---|
| 558 | output << "("; |
---|
[51587aa] | 559 | conditionalExpr->get_arg1()->accept( *this ); |
---|
[6c4ff37] | 560 | output << " ? "; |
---|
[51587aa] | 561 | conditionalExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 562 | output << " : "; |
---|
[51587aa] | 563 | conditionalExpr->get_arg3()->accept( *this ); |
---|
[6c4ff37] | 564 | output << ")"; |
---|
[51587aa] | 565 | } |
---|
[71f4e4f] | 566 | |
---|
[6c4ff37] | 567 | void CodeGenerator::visit( CommaExpr *commaExpr ) { |
---|
| 568 | output << "("; |
---|
[51587aa] | 569 | commaExpr->get_arg1()->accept( *this ); |
---|
[6c4ff37] | 570 | output << " , "; |
---|
[51587aa] | 571 | commaExpr->get_arg2()->accept( *this ); |
---|
[6c4ff37] | 572 | output << ")"; |
---|
[51587aa] | 573 | } |
---|
[71f4e4f] | 574 | |
---|
[6c4ff37] | 575 | void CodeGenerator::visit( TupleExpr *tupleExpr ) {} |
---|
[71f4e4f] | 576 | |
---|
[6c4ff37] | 577 | void CodeGenerator::visit( TypeExpr *typeExpr ) {} |
---|
[2b6c1e0] | 578 | |
---|
[7f5566b] | 579 | void CodeGenerator::visit( AsmExpr *asmExpr ) { |
---|
| 580 | if ( asmExpr->get_inout() ) { |
---|
| 581 | output << "[ "; |
---|
| 582 | asmExpr->get_inout()->accept( *this ); |
---|
| 583 | output << " ] "; |
---|
| 584 | } // if |
---|
| 585 | asmExpr->get_constraint()->accept( *this ); |
---|
| 586 | output << " ( "; |
---|
| 587 | asmExpr->get_operand()->accept( *this ); |
---|
| 588 | output << " )"; |
---|
| 589 | } |
---|
| 590 | |
---|
[51587aa] | 591 | //*** Statements |
---|
[6c4ff37] | 592 | void CodeGenerator::visit( CompoundStmt *compoundStmt ) { |
---|
[51587aa] | 593 | std::list<Statement*> ks = compoundStmt->get_kids(); |
---|
[2b6c1e0] | 594 | output << "{" << endl; |
---|
[51587aa] | 595 | |
---|
[2b6c1e0] | 596 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 597 | |
---|
[7f5566b] | 598 | for ( std::list<Statement *>::iterator i = ks.begin(); i != ks.end(); i++ ) { |
---|
[cda48b6] | 599 | output << indent << printLabels( (*i)->get_labels() ); |
---|
[7f5566b] | 600 | (*i)->accept( *this ); |
---|
[2b6c1e0] | 601 | |
---|
[6c4ff37] | 602 | output << endl; |
---|
[2b6c1e0] | 603 | if ( wantSpacing( *i ) ) { |
---|
| 604 | output << endl; |
---|
| 605 | } |
---|
[51587aa] | 606 | } |
---|
[71f4e4f] | 607 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 608 | |
---|
[cda48b6] | 609 | output << indent << "}"; |
---|
[51587aa] | 610 | } |
---|
| 611 | |
---|
[6c4ff37] | 612 | void CodeGenerator::visit( ExprStmt *exprStmt ) { |
---|
[71f4e4f] | 613 | // I don't see why this check is necessary. |
---|
| 614 | // If this starts to cause problems then put it back in, |
---|
[6c4ff37] | 615 | // with an explanation |
---|
| 616 | assert( exprStmt ); |
---|
| 617 | |
---|
| 618 | // if ( exprStmt != 0 ) { |
---|
| 619 | exprStmt->get_expr()->accept( *this ); |
---|
| 620 | output << ";" ; |
---|
| 621 | // } // if |
---|
[51587aa] | 622 | } |
---|
| 623 | |
---|
[7f5566b] | 624 | void CodeGenerator::visit( AsmStmt *asmStmt ) { |
---|
| 625 | output << "asm "; |
---|
| 626 | if ( asmStmt->get_voltile() ) output << "volatile "; |
---|
| 627 | if ( ! asmStmt->get_gotolabels().empty() ) output << "goto "; |
---|
| 628 | output << "( "; |
---|
| 629 | if ( asmStmt->get_instruction() ) asmStmt->get_instruction()->accept( *this ); |
---|
| 630 | output << " : "; |
---|
| 631 | genCommaList( asmStmt->get_output().begin(), asmStmt->get_output().end() ); |
---|
| 632 | output << " : "; |
---|
| 633 | genCommaList( asmStmt->get_input().begin(), asmStmt->get_input().end() ); |
---|
| 634 | output << " : "; |
---|
| 635 | genCommaList( asmStmt->get_clobber().begin(), asmStmt->get_clobber().end() ); |
---|
| 636 | if ( ! asmStmt->get_gotolabels().empty() ) { |
---|
| 637 | output << " : "; |
---|
| 638 | for ( std::list<Label>::iterator begin = asmStmt->get_gotolabels().begin();; ) { |
---|
| 639 | output << *begin++; |
---|
| 640 | if ( begin == asmStmt->get_gotolabels().end() ) break; |
---|
| 641 | output << ", "; |
---|
| 642 | } // for |
---|
| 643 | } // if |
---|
| 644 | output << " );" ; |
---|
| 645 | } |
---|
| 646 | |
---|
[6c4ff37] | 647 | void CodeGenerator::visit( IfStmt *ifStmt ) { |
---|
[7f5566b] | 648 | output << "if ( "; |
---|
| 649 | ifStmt->get_condition()->accept( *this ); |
---|
| 650 | output << " ) "; |
---|
[51587aa] | 651 | |
---|
[7f5566b] | 652 | ifStmt->get_thenPart()->accept( *this ); |
---|
[51587aa] | 653 | |
---|
| 654 | if ( ifStmt->get_elsePart() != 0) { |
---|
[2b6c1e0] | 655 | output << " else "; |
---|
[7f5566b] | 656 | ifStmt->get_elsePart()->accept( *this ); |
---|
[51587aa] | 657 | } // if |
---|
| 658 | } |
---|
| 659 | |
---|
[6c4ff37] | 660 | void CodeGenerator::visit( SwitchStmt *switchStmt ) { |
---|
[7f5566b] | 661 | output << "switch ( " ; |
---|
| 662 | switchStmt->get_condition()->accept( *this ); |
---|
| 663 | output << " ) "; |
---|
[71f4e4f] | 664 | |
---|
[2b6c1e0] | 665 | output << "{" << std::endl; |
---|
[6c4ff37] | 666 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 667 | |
---|
[6c4ff37] | 668 | acceptAll( switchStmt->get_branches(), *this ); |
---|
[51587aa] | 669 | |
---|
[6c4ff37] | 670 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 671 | |
---|
[cda48b6] | 672 | output << indent << "}"; |
---|
[51587aa] | 673 | } |
---|
| 674 | |
---|
[6c4ff37] | 675 | void CodeGenerator::visit( CaseStmt *caseStmt ) { |
---|
[cda48b6] | 676 | output << indent; |
---|
[eb3261f] | 677 | if ( caseStmt->isDefault()) { |
---|
[2b6c1e0] | 678 | output << "default"; |
---|
[eb3261f] | 679 | } else { |
---|
[2b6c1e0] | 680 | output << "case "; |
---|
[7f5566b] | 681 | caseStmt->get_condition()->accept( *this ); |
---|
[17cd4eb] | 682 | } // if |
---|
[6c4ff37] | 683 | output << ":\n"; |
---|
[71f4e4f] | 684 | |
---|
[51587aa] | 685 | std::list<Statement *> sts = caseStmt->get_statements(); |
---|
| 686 | |
---|
[6c4ff37] | 687 | cur_indent += CodeGenerator::tabsize; |
---|
[51587aa] | 688 | for ( std::list<Statement *>::iterator i = sts.begin(); i != sts.end(); i++) { |
---|
[cda48b6] | 689 | output << indent << printLabels( (*i)->get_labels() ) ; |
---|
[7f5566b] | 690 | (*i)->accept( *this ); |
---|
[6c4ff37] | 691 | output << endl; |
---|
[51587aa] | 692 | } |
---|
[6c4ff37] | 693 | cur_indent -= CodeGenerator::tabsize; |
---|
[51587aa] | 694 | } |
---|
| 695 | |
---|
[6c4ff37] | 696 | void CodeGenerator::visit( BranchStmt *branchStmt ) { |
---|
[51587aa] | 697 | switch ( branchStmt->get_type()) { |
---|
| 698 | case BranchStmt::Goto: |
---|
| 699 | if ( ! branchStmt->get_target().empty() ) |
---|
[6c4ff37] | 700 | output << "goto " << branchStmt->get_target(); |
---|
[71f4e4f] | 701 | else { |
---|
[51587aa] | 702 | if ( branchStmt->get_computedTarget() != 0 ) { |
---|
[6c4ff37] | 703 | output << "goto *"; |
---|
[51587aa] | 704 | branchStmt->get_computedTarget()->accept( *this ); |
---|
| 705 | } // if |
---|
| 706 | } // if |
---|
| 707 | break; |
---|
| 708 | case BranchStmt::Break: |
---|
[6c4ff37] | 709 | output << "break"; |
---|
[51587aa] | 710 | break; |
---|
| 711 | case BranchStmt::Continue: |
---|
[6c4ff37] | 712 | output << "continue"; |
---|
[51587aa] | 713 | break; |
---|
| 714 | } |
---|
[2b6c1e0] | 715 | output << ";"; |
---|
[51587aa] | 716 | } |
---|
| 717 | |
---|
| 718 | |
---|
[6c4ff37] | 719 | void CodeGenerator::visit( ReturnStmt *returnStmt ) { |
---|
| 720 | output << "return "; |
---|
[51587aa] | 721 | |
---|
| 722 | // xxx -- check for null expression; |
---|
| 723 | if ( returnStmt->get_expr() ) { |
---|
| 724 | returnStmt->get_expr()->accept( *this ); |
---|
| 725 | } // if |
---|
[6c4ff37] | 726 | output << ";"; |
---|
[51587aa] | 727 | } |
---|
| 728 | |
---|
[6c4ff37] | 729 | void CodeGenerator::visit( WhileStmt *whileStmt ) { |
---|
[51587aa] | 730 | if ( whileStmt->get_isDoWhile() ) |
---|
[6c4ff37] | 731 | output << "do" ; |
---|
[51587aa] | 732 | else { |
---|
[6c4ff37] | 733 | output << "while (" ; |
---|
[7f5566b] | 734 | whileStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 735 | output << ")"; |
---|
[51587aa] | 736 | } // if |
---|
[2b6c1e0] | 737 | output << " "; |
---|
[51587aa] | 738 | |
---|
[2b6c1e0] | 739 | output << CodeGenerator::printLabels( whileStmt->get_body()->get_labels() ); |
---|
[51587aa] | 740 | whileStmt->get_body()->accept( *this ); |
---|
| 741 | |
---|
[cda48b6] | 742 | output << indent; |
---|
[51587aa] | 743 | |
---|
| 744 | if ( whileStmt->get_isDoWhile() ) { |
---|
[6c4ff37] | 745 | output << " while (" ; |
---|
[7f5566b] | 746 | whileStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 747 | output << ");"; |
---|
[51587aa] | 748 | } // if |
---|
| 749 | } |
---|
| 750 | |
---|
[6c4ff37] | 751 | void CodeGenerator::visit( ForStmt *forStmt ) { |
---|
[71f4e4f] | 752 | // initialization is always hoisted, so don't |
---|
| 753 | // bother doing anything with that |
---|
[145f1fc] | 754 | output << "for (;"; |
---|
[51587aa] | 755 | |
---|
| 756 | if ( forStmt->get_condition() != 0 ) |
---|
| 757 | forStmt->get_condition()->accept( *this ); |
---|
[6c4ff37] | 758 | output << ";"; |
---|
[51587aa] | 759 | |
---|
| 760 | if ( forStmt->get_increment() != 0 ) |
---|
| 761 | forStmt->get_increment()->accept( *this ); |
---|
[2b6c1e0] | 762 | output << ") "; |
---|
[51587aa] | 763 | |
---|
| 764 | if ( forStmt->get_body() != 0 ) { |
---|
[2b6c1e0] | 765 | output << CodeGenerator::printLabels( forStmt->get_body()->get_labels() ); |
---|
[51587aa] | 766 | forStmt->get_body()->accept( *this ); |
---|
| 767 | } // if |
---|
| 768 | } |
---|
| 769 | |
---|
[6c4ff37] | 770 | void CodeGenerator::visit( NullStmt *nullStmt ) { |
---|
[cda48b6] | 771 | //output << indent << CodeGenerator::printLabels( nullStmt->get_labels() ); |
---|
[6c4ff37] | 772 | output << "/* null statement */ ;"; |
---|
[51587aa] | 773 | } |
---|
| 774 | |
---|
[6c4ff37] | 775 | void CodeGenerator::visit( DeclStmt *declStmt ) { |
---|
[51587aa] | 776 | declStmt->get_decl()->accept( *this ); |
---|
[71f4e4f] | 777 | |
---|
[51587aa] | 778 | if ( doSemicolon( declStmt->get_decl() ) ) { |
---|
[6c4ff37] | 779 | output << ";"; |
---|
[51587aa] | 780 | } // if |
---|
| 781 | } |
---|
| 782 | |
---|
[6c4ff37] | 783 | std::string CodeGenerator::printLabels( std::list< Label > &l ) { |
---|
[51587aa] | 784 | std::string str( "" ); |
---|
[6c4ff37] | 785 | l.unique(); // assumes a sorted list. Why not use set? |
---|
[51587aa] | 786 | |
---|
| 787 | for ( std::list< Label >::iterator i = l.begin(); i != l.end(); i++ ) |
---|
| 788 | str += *i + ": "; |
---|
| 789 | |
---|
| 790 | return str; |
---|
| 791 | } |
---|
| 792 | |
---|
[6c4ff37] | 793 | void CodeGenerator::handleStorageClass( Declaration *decl ) { |
---|
[51587aa] | 794 | switch ( decl->get_storageClass() ) { |
---|
[68cd1ce] | 795 | case DeclarationNode::Extern: |
---|
[6c4ff37] | 796 | output << "extern "; |
---|
[51587aa] | 797 | break; |
---|
[68cd1ce] | 798 | case DeclarationNode::Static: |
---|
[6c4ff37] | 799 | output << "static "; |
---|
[51587aa] | 800 | break; |
---|
[68cd1ce] | 801 | case DeclarationNode::Auto: |
---|
[51587aa] | 802 | // silently drop storage class |
---|
| 803 | break; |
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[68cd1ce] | 804 | case DeclarationNode::Register: |
---|
[6c4ff37] | 805 | output << "register "; |
---|
[51587aa] | 806 | break; |
---|
[68cd1ce] | 807 | case DeclarationNode::Inline: |
---|
[de62360d] | 808 | output << "inline "; |
---|
[f38c8d9] | 809 | break; |
---|
[68cd1ce] | 810 | case DeclarationNode::Fortran: |
---|
| 811 | output << "fortran "; |
---|
| 812 | break; |
---|
| 813 | case DeclarationNode::Noreturn: |
---|
| 814 | output << "_Noreturn "; |
---|
| 815 | break; |
---|
| 816 | case DeclarationNode::Threadlocal: |
---|
| 817 | output << "_Thread_local "; |
---|
| 818 | break; |
---|
| 819 | case DeclarationNode::NoStorageClass: |
---|
[f38c8d9] | 820 | break; |
---|
[843054c2] | 821 | } // switch |
---|
[51587aa] | 822 | } |
---|
[51b7345] | 823 | } // namespace CodeGen |
---|
[51587aa] | 824 | |
---|
| 825 | // Local Variables: // |
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| 826 | // tab-width: 4 // |
---|
| 827 | // mode: c++ // |
---|
| 828 | // compile-command: "make install" // |
---|
| 829 | // End: // |
---|