[51b7345] | 1 | #include <list> |
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| 2 | #include <vector> |
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| 3 | #include <cassert> |
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| 4 | #include <algorithm> |
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| 5 | |
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| 6 | #include "MultRet.h" |
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| 7 | #include "SynTree/Statement.h" |
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| 8 | #include "SynTree/Expression.h" |
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| 9 | #include "SynTree/Declaration.h" |
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| 10 | #include "SynTree/Type.h" |
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| 11 | |
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| 12 | namespace Tuples { |
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| 13 | |
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| 14 | MVRMutator::MVRMutator() : newVars( 0 ), newCode( 0 ) |
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| 15 | { |
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| 16 | } |
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| 17 | |
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| 18 | MVRMutator::~MVRMutator() |
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| 19 | { |
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| 20 | } |
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| 21 | |
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| 22 | int MVRMutator::curVal = 0; |
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| 23 | |
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| 24 | Statement *MVRMutator::mutate( ExprStmt *exprStmt ){ |
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| 25 | MVRMutator toplevel; |
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| 26 | exprStmt->set_expr( maybeMutate( exprStmt->get_expr(), toplevel ) ); |
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| 27 | |
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| 28 | if ( toplevel.hasCode() ) { |
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| 29 | assert ( toplevel.getVars() != 0 ); |
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| 30 | |
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| 31 | typedef std::list<Statement *> Statements; |
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| 32 | |
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| 33 | CompoundStmt *code = new CompoundStmt( std::list< Label >() ); |
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| 34 | |
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| 35 | // copy variables |
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| 36 | Statements &vars = toplevel.getVars()->get_kids(); |
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| 37 | for( Statements::iterator i = vars.begin(); i != vars.end(); i++ ) |
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| 38 | code->get_kids().push_back( *i ); |
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| 39 | |
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| 40 | // copy statements |
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| 41 | Statements &block = toplevel.getCode()->get_kids(); |
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| 42 | for( Statements::iterator i = block.begin(); i != block.end(); i++ ) |
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| 43 | code->get_kids().push_back( *i ); |
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| 44 | |
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| 45 | return code; |
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| 46 | } else |
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| 47 | return exprStmt; |
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| 48 | } |
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| 49 | |
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| 50 | |
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| 51 | Expression *MVRMutator::mutate( ApplicationExpr *appExpr ) |
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| 52 | { |
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| 53 | // appExpr->set_function( maybeMutate( appExpr->get_function(), *this ) ); |
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| 54 | bool mulretp = false; |
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| 55 | VariableExpr *funname; |
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| 56 | if ( (funname = dynamic_cast<VariableExpr *>(appExpr->get_function())) == 0 ) goto DoArgs; |
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| 57 | |
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| 58 | FunctionDecl *fundecl; |
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| 59 | if ((fundecl = dynamic_cast<FunctionDecl *>(funname->get_var())) == 0) goto DoArgs; |
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| 60 | |
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| 61 | { |
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| 62 | typedef std::list<DeclarationWithType*> RetType; |
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| 63 | |
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| 64 | RetType &rets = fundecl->get_functionType()->get_returnVals(); |
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| 65 | if ( rets.size() <= 1 ) goto DoArgs; |
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| 66 | mulretp = true; |
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| 67 | |
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| 68 | if( newVars == 0 ) |
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| 69 | newVars = new CompoundStmt( std::list<Label>(0) ); |
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| 70 | |
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| 71 | for (RetType::iterator i = rets.begin() ; i != rets.end(); i++) { |
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| 72 | DeclStmt *arg = newVar( *i ); |
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| 73 | newVars->get_kids().push_back( arg ); |
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| 74 | add_pending( arg->get_decl() ); |
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| 75 | } |
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| 76 | } |
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| 77 | |
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| 78 | DoArgs: |
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| 79 | // mutate the argument list |
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| 80 | typedef std::list< Expression *> Exprs; |
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| 81 | Exprs &args = appExpr->get_args(); |
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| 82 | std::list< Expression * > newArgs; |
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| 83 | for( Exprs::iterator i = args.begin(); i != args.end(); i++ ) { |
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| 84 | MVRMutator next; |
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| 85 | Expression *mutated = (*i)->acceptMutator( next ); |
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| 86 | |
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| 87 | if ( next.hasCode() ) { |
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| 88 | // merge new vars and bodies |
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| 89 | typedef std::list< Statement * > Stmts; |
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| 90 | Stmts &vars = next.getVars()->get_kids(); |
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| 91 | Stmts &block = next.getCode()->get_kids(); |
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| 92 | |
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| 93 | if (newVars == 0) |
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| 94 | newVars = new CompoundStmt( std::list< Label >() ); |
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| 95 | for( Stmts::iterator i = vars.begin(); i != vars.end(); i++ ) // std::splice? -- need to append lists |
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| 96 | newVars->get_kids().push_back( *i ); |
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| 97 | |
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| 98 | if (newCode == 0) |
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| 99 | newCode = new CompoundStmt( std::list< Label >() ); |
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| 100 | for( Stmts::iterator i = block.begin(); i != block.end(); i++ ) |
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| 101 | newCode->get_kids().push_back( *i ); |
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| 102 | |
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| 103 | } |
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| 104 | |
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| 105 | if ( next.hasResults() ) { |
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| 106 | Exprs &res = next.get_results(); |
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| 107 | for( Exprs::iterator i = res.begin(); i != res.end(); i++ ) |
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| 108 | newArgs.push_back( *i ); |
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| 109 | } else |
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| 110 | newArgs.push_back( mutated ); |
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| 111 | } |
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| 112 | |
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| 113 | appExpr->get_args() = newArgs; // new argument list |
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| 114 | |
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| 115 | |
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| 116 | if ( mulretp ) { |
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| 117 | // add 'out' parameters |
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| 118 | if ( ! argsToAdd.empty() ) |
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| 119 | for(std::list< Expression *>::iterator i = argsToAdd.begin(); i != argsToAdd.end(); i++) |
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| 120 | (appExpr->get_args()).push_back( *i ); |
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| 121 | // clear 'out' parameters ( so that the list can be reused -- substitute by auto_ptr later? ) |
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| 122 | |
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| 123 | if (newCode == 0) |
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| 124 | newCode = new CompoundStmt( std::list<Label>(0) ); |
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| 125 | } |
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| 126 | |
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| 127 | // add to block of code |
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| 128 | if ( newCode != 0 ) |
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| 129 | newCode->get_kids().push_back( new ExprStmt( std::list<Label>(), appExpr ) ); |
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| 130 | |
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| 131 | return appExpr; |
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| 132 | } |
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| 133 | |
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| 134 | // Auxiliary function to generate new names for the `output' parameters |
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| 135 | DeclStmt *MVRMutator::newVar( DeclarationWithType *reqDecl ) { |
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| 136 | // std::ostrstream os; |
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| 137 | // os << "__" << curVal++ << "__";// << std::ends; |
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| 138 | // os.freeze( false ); |
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| 139 | |
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| 140 | ObjectDecl *decl; |
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| 141 | if ((decl = dynamic_cast<ObjectDecl *>( reqDecl )) != 0) |
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| 142 | // return new DeclStmt( new ObjectDecl( std::string (os.str(), os.pcount()), ); |
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| 143 | return new DeclStmt( std::list<Label>(), decl ); |
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| 144 | else |
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| 145 | return 0; |
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| 146 | } |
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| 147 | |
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| 148 | void MVRMutator::add_pending( Declaration *decl ) { |
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| 149 | ObjectDecl *obj; |
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| 150 | if ( (obj = dynamic_cast< ObjectDecl * >( decl )) == 0 ) return; |
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| 151 | |
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| 152 | VariableExpr *var = new VariableExpr(obj, 0 ); |
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| 153 | results.push_back( var ); // probably change this name to newResults or something |
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| 154 | argsToAdd.push_back( new AddressExpr( var ) ); |
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| 155 | return; |
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| 156 | } |
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| 157 | } |
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