| 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 | // FixInit.h --
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| 8 | //
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| 9 | // Author : Rob Schluntz
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| 10 | // Created On : Wed Jan 13 16:29:30 2016
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| 11 | // Last Modified By : Rob Schluntz
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| 12 | // Last Modified On : Wed Mar 30 14:34:46 2016
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| 13 | // Update Count : 30
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| 14 | //
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| 15 |
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| 16 | #include <stack>
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| 17 | #include <list>
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| 18 | #include "RemoveInit.h"
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| 19 | #include "SynTree/Declaration.h"
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| 20 | #include "SynTree/Type.h"
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| 21 | #include "SynTree/Expression.h"
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| 22 | #include "SynTree/Statement.h"
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| 23 | #include "SynTree/Initializer.h"
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| 24 | #include "SynTree/Mutator.h"
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| 25 | #include "GenPoly/PolyMutator.h"
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| 26 |
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| 27 | namespace InitTweak {
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| 28 | namespace {
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| 29 | const std::list<Label> noLabels;
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| 30 | }
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| 31 |
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| 32 | class FixInit : public GenPoly::PolyMutator {
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| 33 | public:
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| 34 | static void fixInitializers( std::list< Declaration * > &translationUnit );
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| 35 |
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| 36 | virtual ObjectDecl * mutate( ObjectDecl *objDecl );
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| 37 |
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| 38 | virtual CompoundStmt * mutate( CompoundStmt * compoundStmt );
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| 39 |
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| 40 | private:
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| 41 | std::list< Statement * > dtorStmts;
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| 42 | };
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| 43 |
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| 44 | void fix( std::list< Declaration * > & translationUnit ) {
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| 45 | FixInit::fixInitializers( translationUnit );
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| 46 | }
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| 47 |
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| 48 | void FixInit::fixInitializers( std::list< Declaration * > & translationUnit ) {
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| 49 | FixInit fixer;
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| 50 | mutateAll( translationUnit, fixer );
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| 51 | }
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| 52 |
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| 53 | ObjectDecl *FixInit::mutate( ObjectDecl *objDecl ) {
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| 54 | if ( ConstructorInit * ctorInit = dynamic_cast< ConstructorInit * >( objDecl->get_init() ) ) {
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| 55 | // a decision should have been made by the resolver, so ctor and init are not both non-NULL
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| 56 | assert( ! ctorInit->get_ctor() || ! ctorInit->get_init() );
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| 57 | if ( Statement * ctor = ctorInit->get_ctor() ) {
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| 58 | stmtsToAddAfter.push_back( ctor );
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| 59 | dtorStmts.push_front( ctorInit->get_dtor() );
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| 60 | objDecl->set_init( NULL );
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| 61 | ctorInit->set_ctor( NULL );
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| 62 | ctorInit->set_dtor( NULL ); // xxx - only destruct when constructing? Probably not?
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| 63 | } else if ( Initializer * init = ctorInit->get_init() ) {
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| 64 | objDecl->set_init( init );
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| 65 | ctorInit->set_init( NULL );
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| 66 | } else {
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| 67 | // no constructor and no initializer, which is okay
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| 68 | objDecl->set_init( NULL );
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| 69 | }
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| 70 | delete ctorInit;
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| 71 | }
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| 72 | return objDecl;
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| 73 | }
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| 74 |
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| 75 | CompoundStmt * FixInit::mutate( CompoundStmt * compoundStmt ) {
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| 76 | // mutate statements - this will also populate dtorStmts list
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| 77 | // don't want to dump all destructors when block is left,
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| 78 | // just the destructors associated with variables defined in this block
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| 79 | std::list< Statement * > oldDestructorStmts = dtorStmts;
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| 80 | dtorStmts = std::list<Statement *>();
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| 81 |
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| 82 | compoundStmt = PolyMutator::mutate( compoundStmt );
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| 83 | std::list< Statement * > & statements = compoundStmt->get_kids();
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| 84 | for ( std::list< Statement * >::iterator it = dtorStmts.begin(); it != dtorStmts.end(); ++it ) {
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| 85 | // remove if instrinsic destructor statement
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| 86 | // xxx - test user manually calling intrinsic functions - what happens?
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| 87 | if ( ExprStmt * exprStmt = dynamic_cast< ExprStmt * >( *it ) ) {
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| 88 | ApplicationExpr * appExpr = dynamic_cast< ApplicationExpr * >( exprStmt->get_expr() );
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| 89 | assert( appExpr );
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| 90 | VariableExpr * function = dynamic_cast< VariableExpr * >( appExpr->get_function() );
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| 91 | assert( function );
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| 92 | // check for Intrinsic only - don't want to remove all overridable dtors because autogenerated dtor
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| 93 | // will call all member dtors, and some members may have a user defined dtor.
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| 94 | if ( function->get_var()->get_linkage() == LinkageSpec::Intrinsic ) {
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| 95 | // don't ned to call intrinsic dtor, because it does nothing
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| 96 | delete *it;
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| 97 | } else {
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| 98 | // non-intrinsic dtors must be called
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| 99 | statements.push_back( *it );
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| 100 | }
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| 101 | } else {
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| 102 | // could also be a compound statement with a loop, in the case of an array
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| 103 | statements.push_back( *it );
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| 104 | }
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| 105 | }
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| 106 | // TODO: adding to the end of a block isn't sufficient, since
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| 107 | // return/break/goto should trigger destructor when block is left.
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| 108 | dtorStmts = oldDestructorStmts;
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| 109 | return compoundStmt;
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| 110 | }
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| 111 |
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| 112 | } // namespace InitTweak
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| 113 |
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| 114 | // Local Variables: //
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| 115 | // tab-width: 4 //
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| 116 | // mode: c++ //
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| 117 | // compile-command: "make install" //
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| 118 | // End: //
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