[972e6f7] | 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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| 7 | // Autogen.h -- |
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| 8 | // |
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| 9 | // Author : Rob Schluntz |
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| 10 | // Created On : Sun May 17 21:53:34 2015 |
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| 11 | // Last Modified By : Rob Schluntz |
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| 12 | // Last Modified On : Tue May 19 16:49:43 2015 |
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| 13 | // Update Count : 1 |
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| 14 | // |
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| 15 | |
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| 16 | #ifndef AUTOGEN_H |
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| 17 | #define AUTOGEN_H |
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| 18 | |
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| 19 | #include <string> |
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| 20 | #include "SynTree/Statement.h" |
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| 21 | #include "SynTree/Expression.h" |
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| 22 | #include "SynTree/Declaration.h" |
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| 23 | #include "SynTree/Initializer.h" |
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[39f84a4] | 24 | #include "InitTweak/InitTweak.h" |
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[972e6f7] | 25 | |
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| 26 | namespace SymTab { |
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[2be1023] | 27 | /// Generates assignment operators, constructors, and destructor for aggregate types as required |
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| 28 | void autogenerateRoutines( std::list< Declaration * > &translationUnit ); |
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| 29 | |
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| 30 | /// returns true if obj's name is the empty string and it has a bitfield width |
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| 31 | bool isUnnamedBitfield( ObjectDecl * obj ); |
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| 32 | |
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[5f98ce5] | 33 | /// size_t type - set when size_t typedef is seen. Useful in a few places, |
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| 34 | /// such as in determining array dimension type |
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| 35 | extern Type * SizeType; |
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| 36 | |
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[2be1023] | 37 | /// inserts into out a generated call expression to function fname with arguments dstParam and srcParam. Intended to be used with generated ?=?, ?{}, and ^?{} calls. |
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| 38 | template< typename OutputIterator > |
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[39f84a4] | 39 | void genCall( InitTweak::InitExpander & srcParam, Expression * dstParam, const std::string & fname, OutputIterator out, Type * type, bool forward = true ); |
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[2be1023] | 40 | |
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| 41 | /// inserts into out a generated call expression to function fname with arguments dstParam and srcParam. Should only be called with non-array types. |
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| 42 | template< typename OutputIterator > |
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[39f84a4] | 43 | void genScalarCall( InitTweak::InitExpander & srcParam, Expression *dstParam, const std::string & fname, OutputIterator out ) { |
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[2be1023] | 44 | // want to be able to generate assignment, ctor, and dtor generically, |
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| 45 | // so fname is either ?=?, ?{}, or ^?{} |
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| 46 | UntypedExpr *fExpr = new UntypedExpr( new NameExpr( fname ) ); |
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| 47 | |
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| 48 | // do something special for unnamed members |
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| 49 | fExpr->get_args().push_back( new AddressExpr( dstParam ) ); |
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| 50 | |
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[39f84a4] | 51 | Statement * listInit = srcParam.buildListInit( fExpr ); |
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| 52 | if ( listInit ) { |
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| 53 | *out++ = listInit; |
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| 54 | } |
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| 55 | |
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| 56 | std::list< Expression * > args = *++srcParam; |
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| 57 | fExpr->get_args().splice( fExpr->get_args().end(), args ); |
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| 58 | /* if ( srcParam ) { |
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| 59 | // xxx - |
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| 60 | // make srcParam more complicated |
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| 61 | // if srcParam contains |
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[2be1023] | 62 | fExpr->get_args().push_back( srcParam ); |
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| 63 | } |
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[39f84a4] | 64 | */ |
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[2be1023] | 65 | *out++ = new ExprStmt( noLabels, fExpr ); |
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| 66 | } |
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| 67 | |
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| 68 | /// Store in out a loop which calls fname on each element of the array with srcParam and dstParam as arguments. |
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| 69 | /// If forward is true, loop goes from 0 to N-1, else N-1 to 0 |
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| 70 | template< typename OutputIterator > |
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[39f84a4] | 71 | void genArrayCall( InitTweak::InitExpander & srcParam, Expression *dstParam, const std::string & fname, OutputIterator out, ArrayType *array, bool forward = true ) { |
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[2be1023] | 72 | static UniqueName indexName( "_index" ); |
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| 73 | |
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| 74 | // for a flexible array member nothing is done -- user must define own assignment |
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| 75 | if ( ! array->get_dimension() ) return ; |
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| 76 | |
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| 77 | Expression * begin, * end, * update, * cmp; |
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| 78 | if ( forward ) { |
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| 79 | // generate: for ( int i = 0; i < 0; ++i ) |
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| 80 | begin = new NameExpr( "0" ); |
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| 81 | end = array->get_dimension()->clone(); |
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| 82 | cmp = new NameExpr( "?<?" ); |
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| 83 | update = new NameExpr( "++?" ); |
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| 84 | } else { |
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| 85 | // generate: for ( int i = N-1; i >= 0; --i ) |
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| 86 | begin = new UntypedExpr( new NameExpr( "?-?" ) ); |
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| 87 | ((UntypedExpr*)begin)->get_args().push_back( array->get_dimension()->clone() ); |
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| 88 | ((UntypedExpr*)begin)->get_args().push_back( new NameExpr( "1" ) ); |
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| 89 | end = new NameExpr( "0" ); |
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| 90 | cmp = new NameExpr( "?>=?" ); |
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| 91 | update = new NameExpr( "--?" ); |
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| 92 | } |
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| 93 | |
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| 94 | ObjectDecl *index = new ObjectDecl( indexName.newName(), DeclarationNode::NoStorageClass, LinkageSpec::C, 0, new BasicType( Type::Qualifiers(), BasicType::SignedInt ), NULL ); |
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| 95 | |
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| 96 | UntypedExpr *init = new UntypedExpr( new NameExpr( "?=?" ) ); |
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| 97 | init->get_args().push_back( new AddressExpr( new VariableExpr( index ) ) ); |
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| 98 | init->get_args().push_back( begin ); |
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| 99 | index->set_init( new SingleInit( init, std::list<Expression*>() ) ); |
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| 100 | |
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| 101 | UntypedExpr *cond = new UntypedExpr( cmp ); |
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| 102 | cond->get_args().push_back( new VariableExpr( index ) ); |
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| 103 | cond->get_args().push_back( end ); |
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| 104 | |
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| 105 | UntypedExpr *inc = new UntypedExpr( update ); |
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| 106 | inc->get_args().push_back( new AddressExpr( new VariableExpr( index ) ) ); |
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| 107 | |
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| 108 | UntypedExpr *dstIndex = new UntypedExpr( new NameExpr( "?[?]" ) ); |
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| 109 | dstIndex->get_args().push_back( dstParam ); |
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| 110 | dstIndex->get_args().push_back( new VariableExpr( index ) ); |
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| 111 | dstParam = dstIndex; |
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| 112 | |
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[39f84a4] | 113 | // srcParam must keep track of the array indices to build the |
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| 114 | // source parameter and/or array list initializer |
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| 115 | srcParam.addArrayIndex( new VariableExpr( index ), array->get_dimension()->clone() ); |
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| 116 | |
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| 117 | // if ( srcParam ) { |
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| 118 | // UntypedExpr *srcIndex = new UntypedExpr( new NameExpr( "?[?]" ) ); |
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| 119 | // srcIndex->get_args().push_back( srcParam ); |
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| 120 | // srcIndex->get_args().push_back( new VariableExpr( index ) ); |
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| 121 | // srcParam = srcIndex; |
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| 122 | // } |
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[2be1023] | 123 | |
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| 124 | // for stmt's body, eventually containing call |
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| 125 | CompoundStmt * body = new CompoundStmt( noLabels ); |
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| 126 | genCall( srcParam, dstParam, fname, back_inserter( body->get_kids() ), array->get_base(), forward ); |
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| 127 | |
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| 128 | // block containing for stmt and index variable |
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| 129 | std::list<Statement *> initList; |
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| 130 | CompoundStmt * block = new CompoundStmt( noLabels ); |
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| 131 | block->get_kids().push_back( new DeclStmt( noLabels, index ) ); |
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| 132 | block->get_kids().push_back( new ForStmt( noLabels, initList, cond, inc, body ) ); |
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| 133 | |
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| 134 | *out++ = block; |
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| 135 | } |
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| 136 | |
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| 137 | template< typename OutputIterator > |
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[39f84a4] | 138 | void genCall( InitTweak::InitExpander & srcParam, Expression * dstParam, const std::string & fname, OutputIterator out, Type * type, bool forward ) { |
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[2be1023] | 139 | if ( ArrayType * at = dynamic_cast< ArrayType * >( type ) ) { |
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| 140 | genArrayCall( srcParam, dstParam, fname, out, at, forward ); |
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| 141 | } else { |
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| 142 | genScalarCall( srcParam, dstParam, fname, out ); |
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| 143 | } |
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| 144 | } |
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| 145 | |
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| 146 | /// inserts into out a generated call expression to function fname with arguments dstParam |
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| 147 | /// and srcParam. Intended to be used with generated ?=?, ?{}, and ^?{} calls. decl is the |
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| 148 | /// object being constructed. The function wraps constructor and destructor calls in an |
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| 149 | /// ImplicitCtorDtorStmt node. |
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| 150 | template< typename OutputIterator > |
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[39f84a4] | 151 | void genImplicitCall( InitTweak::InitExpander & srcParam, Expression * dstParam, const std::string & fname, OutputIterator out, DeclarationWithType * decl, bool forward = true ) { |
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[2be1023] | 152 | ObjectDecl *obj = dynamic_cast<ObjectDecl *>( decl ); |
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| 153 | assert( obj ); |
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| 154 | // unnamed bit fields are not copied as they cannot be accessed |
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| 155 | if ( isUnnamedBitfield( obj ) ) return; |
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| 156 | |
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| 157 | std::list< Statement * > stmts; |
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| 158 | genCall( srcParam, dstParam, fname, back_inserter( stmts ), obj->get_type(), forward ); |
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| 159 | |
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[6cf27a07] | 160 | // currently genCall should produce at most one element, but if that changes then the next line needs to be updated to grab the statement which contains the call |
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| 161 | assert( stmts.size() <= 1 ); |
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| 162 | if ( stmts.size() == 1 ) { |
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| 163 | Statement * callStmt = stmts.front(); |
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| 164 | if ( (fname == "?{}" || fname == "^?{}") && ( !obj || ( obj && obj->get_bitfieldWidth() == NULL ) ) ) { |
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| 165 | // implicitly generated ctor/dtor calls should be wrapped |
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| 166 | // so that later passes are aware they were generated. |
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| 167 | // xxx - don't mark as an implicit ctor/dtor if obj is a bitfield, |
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| 168 | // because this causes the address to be taken at codegen, which is illegal in C. |
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| 169 | callStmt = new ImplicitCtorDtorStmt( callStmt ); |
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| 170 | } |
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| 171 | *out++ = callStmt; |
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| 172 | } |
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[2be1023] | 173 | } |
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[972e6f7] | 174 | } // namespace SymTab |
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| 175 | #endif // AUTOGEN_H |
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| 176 | |
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