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 | // FunctionFixer.cc -- |
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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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11 | // Last Modified By : Peter A. Buhr |
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12 | // Last Modified On : Mon May 18 12:02:22 2015 |
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13 | // Update Count : 1 |
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14 | // |
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15 | |
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16 | #include <list> |
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17 | #include <vector> |
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18 | #include <cassert> |
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19 | #include <algorithm> |
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20 | |
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21 | #include "FunctionFixer.h" |
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22 | |
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23 | namespace Tuples { |
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24 | DeclarationWithType *FunctionFixer::mutate( FunctionDecl *functionDecl ) { |
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25 | functionDecl->set_functionType( maybeMutate( functionDecl->get_functionType(), *this ) ); |
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26 | mutateAll( functionDecl->get_oldDecls(), *this ); |
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27 | functionDecl->set_statements( maybeMutate( functionDecl->get_statements(), *this ) ); |
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28 | index.visit( functionDecl ); |
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29 | rets.clear(); |
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30 | return functionDecl; |
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31 | } |
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32 | |
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33 | Type *FunctionFixer::mutate( FunctionType *functionType ) { |
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34 | typedef std::list< DeclarationWithType * > Decls; |
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35 | |
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36 | if ( functionType->get_returnVals().size() <= 1 ) return functionType; |
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37 | std::copy( functionType->get_returnVals().begin(), functionType->get_returnVals().end(), back_inserter(rets) ); |
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38 | |
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39 | Type::Qualifiers qual; |
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40 | for ( Decls::iterator i = rets.begin(); i != rets.end(); i++ ) { |
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41 | (*i)->set_type( new PointerType( qual, (*i)->get_type() ) ); |
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42 | functionType->get_parameters().push_back( *i ); |
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43 | } // for |
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44 | |
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45 | functionType->get_returnVals() = *(new std::list< DeclarationWithType * >()); |
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46 | |
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47 | functionType->set_isVarArgs( false ); |
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48 | return functionType; |
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49 | } |
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50 | |
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51 | Statement *FunctionFixer::mutate( ReturnStmt *retStmt ) { |
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52 | bool tupleReturn = false; |
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53 | Expression *rhs = 0; |
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54 | // also check if returning multiple values |
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55 | if ( CastExpr *cst = dynamic_cast<CastExpr *>( retStmt->get_expr() ) ) { |
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56 | if ( ApplicationExpr *app = dynamic_cast<ApplicationExpr *>( cst->get_arg() ) ) { |
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57 | if ( app->get_results().size() > 1 ) { // doesn't need to be ApplicationExpr |
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58 | tupleReturn = true; |
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59 | rhs = app; |
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60 | } |
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61 | } else if ( TupleExpr *t = dynamic_cast<TupleExpr *>( cst->get_arg() ) ) { |
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62 | tupleReturn = true; |
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63 | assert( rets.size() == t->get_exprs().size() ); // stupid check, resolve expression |
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64 | rhs = t; |
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65 | } // if |
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66 | |
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67 | if ( tupleReturn ) { |
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68 | assert ( rhs != 0 ); |
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69 | std::list< Expression * > lhs; |
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70 | for ( std::list< DeclarationWithType * >::iterator d = rets.begin(); d != rets.end(); ++d ) { |
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71 | std::list<Expression *> largs; |
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72 | largs.push_back(new VariableExpr( *d )); |
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73 | Expression *exp = ResolvExpr::resolveInVoidContext( new CastExpr( new UntypedExpr(new NameExpr("*?"), largs), (*d)->get_type()), |
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74 | index ); |
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75 | lhs.push_back(exp); |
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76 | } // for |
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77 | std::list< Expression * > args; |
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78 | TupleExpr *tlhs = new TupleExpr; tlhs->set_exprs( lhs ); |
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79 | args.push_back( new AddressExpr(tlhs) ); |
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80 | args.push_back(rhs); |
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81 | |
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82 | return new ExprStmt( std::list< Label>(), new UntypedExpr( new NameExpr("?=?"), args ) ); |
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83 | } // if |
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84 | } // if |
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85 | /* |
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86 | else |
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87 | std::cerr << "Empty return statement" << std::endl; |
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88 | */ |
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89 | |
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90 | return retStmt; |
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91 | } |
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92 | |
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93 | Expression* FunctionFixer::mutate( VariableExpr *variableExpr ) { |
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94 | if ( rets.empty() ) return variableExpr; |
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95 | mutateAll( variableExpr->get_results(), *this ); |
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96 | if ( std::find( rets.begin(), rets.end(), variableExpr->get_var() ) != rets.end() ) |
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97 | // if ( PointerType *ptr = dynamic_cast<PointerType *>(variableExpr->get_var()->get_type()) ) { |
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98 | if ( dynamic_cast<PointerType *>(variableExpr->get_var()->get_type()) != 0 ) { |
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99 | std::list<Expression *> largs; |
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100 | largs.push_back( new AddressExpr(variableExpr) ); |
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101 | Expression *expr = ResolvExpr::resolveInVoidContext( /*new CastExpr(*/new UntypedExpr( new NameExpr( "*?" ), largs )/*, |
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102 | ptr->get_base()),*/, index); |
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103 | if ( ApplicationExpr *app = dynamic_cast< ApplicationExpr * >( expr ) ) { |
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104 | assert( app->get_args().size() == 1 ); |
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105 | app->get_args().pop_front(); |
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106 | app->get_args().push_back( variableExpr ); |
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107 | return app; |
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108 | } |
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109 | } |
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110 | return variableExpr; |
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111 | } |
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112 | |
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113 | /* |
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114 | Expression* FunctionFixer::mutate(ApplicationExpr *applicationExpr) { |
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115 | std::cerr << "In Application Expression" << std::endl; |
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116 | mutateAll( applicationExpr->get_results(), *this ); |
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117 | applicationExpr->set_function( maybeMutate( applicationExpr->get_function(), *this ) ); |
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118 | mutateAll( applicationExpr->get_args(), *this ); |
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119 | return applicationExpr; |
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120 | } |
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121 | */ |
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122 | } // namespace Tuples |
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123 | // Local Variables: // |
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124 | // tab-width: 4 // |
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125 | // mode: c++ // |
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126 | // compile-command: "make install" // |
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127 | // End: // |
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