Changes in src/GenPoly/Box.cc [b4cd03b7:b10c9959]
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src/GenPoly/Box.cc
rb4cd03b7 rb10c9959 10 10 // Created On : Mon May 18 07:44:20 2015 11 11 // Last Modified By : Rob Schluntz 12 // Last Modified On : Fri Feb 05 12:23:10 201613 // Update Count : 2 8012 // Last Modified On : Fri Dec 18 14:53:08 2015 13 // Update Count : 217 14 14 // 15 15 … … 123 123 }; 124 124 125 /// Replaces member expressions for polymorphic types with calculated add-field-offset-and-dereference 125 /// Replaces member expressions for polymorphic types with calculated add-field-offset-and-dereference; 126 /// also fixes offsetof expressions. 126 127 class MemberExprFixer : public PolyMutator { 127 128 public: … … 136 137 virtual Type *mutate( FunctionType *funcType ); 137 138 virtual Expression *mutate( MemberExpr *memberExpr ); 139 virtual Expression *mutate( OffsetofExpr *offsetofExpr ); 138 140 }; 139 141 140 142 /// Replaces initialization of polymorphic values with alloca, declaration of dtype/ftype with appropriate void expression, and sizeof expressions of polymorphic types with the proper variable 141 143 class Pass3 : public PolyMutator { … … 176 178 seenIntrinsic = false; // break on this line when debugging for end of prelude 177 179 } 178 180 179 181 *i = dynamic_cast< Declaration* >( (*i)->acceptMutator( mutator ) ); 180 182 assert( *i ); … … 284 286 } 285 287 } 286 288 287 289 if ( functionDecl->get_statements() ) { // empty routine body ? 288 290 doBeginScope(); … … 318 320 findFunction( (*arg)->get_type(), functions, scopeTyVars, needsAdapter ); 319 321 } // for 320 322 321 323 AdapterMap & adapters = Pass1::adapters.top(); 322 324 for ( std::list< FunctionType *>::iterator funType = functions.begin(); funType != functions.end(); ++funType ) { … … 371 373 Expression *Pass1::makeOffsetArray( StructInstType *ty ) { 372 374 std::list< Declaration* > &baseMembers = ty->get_baseStruct()->get_members(); 373 375 374 376 // make a new temporary array 375 377 Type *offsetType = new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ); … … 395 397 return new VariableExpr( arrayTemp ); 396 398 } 397 399 398 400 void Pass1::passTypeVars( ApplicationExpr *appExpr, std::list< Expression *>::iterator &arg, const TyVarMap &exprTyVars ) { 399 401 // pass size/align for type variables … … 491 493 } 492 494 } 493 495 494 496 Type *Pass1::replaceWithConcrete( ApplicationExpr *appExpr, Type *type, bool doClone ) { 495 497 if ( TypeInstType *typeInst = dynamic_cast< TypeInstType * >( type ) ) { … … 529 531 std::string adapterName = makeAdapterName( mangleName ); 530 532 531 // cast adaptee to void (*)(), since it may have any type inside a polymorphic function 532 Type * adapteeType = new PointerType( Type::Qualifiers(), new FunctionType( Type::Qualifiers(), true ) ); 533 appExpr->get_args().push_front( new CastExpr( appExpr->get_function(), adapteeType ) ); 533 appExpr->get_args().push_front( appExpr->get_function() ); 534 534 appExpr->set_function( new NameExpr( adapterName ) ); 535 535 … … 559 559 } 560 560 561 /// cast parameters to polymorphic functions so that types are replaced with562 /// void * if they are type parameters in the formal type.563 /// this gets rid of warnings from gcc.564 561 void addCast( Expression *&actual, Type *formal, const TyVarMap &tyVars ) { 565 Type * newType = formal->clone(); 566 if ( getFunctionType( newType ) ) { 567 newType = ScrubTyVars::scrub( newType, tyVars ); 562 Type *newType = formal->clone(); 563 std::list< FunctionType *> functions; 564 // instead of functions needing adapters, this really ought to look for 565 // any function mentioning a polymorphic type 566 findAndReplaceFunction( newType, functions, tyVars, needsAdapter ); 567 if ( ! functions.empty() ) { 568 568 actual = new CastExpr( actual, newType ); 569 } else { 570 delete newType; 569 571 } // if 570 572 } … … 987 989 } 988 990 991 /// Wraps a function declaration in a new pointer-to-function variable expression 992 VariableExpr *wrapFunctionDecl( DeclarationWithType *functionDecl ) { 993 // line below cloned from FixFunction.cc 994 ObjectDecl *functionObj = new ObjectDecl( functionDecl->get_name(), functionDecl->get_storageClass(), functionDecl->get_linkage(), 0, 995 new PointerType( Type::Qualifiers(), functionDecl->get_type()->clone() ), 0 ); 996 functionObj->set_mangleName( functionDecl->get_mangleName() ); 997 return new VariableExpr( functionObj ); 998 } 999 989 1000 Statement * Pass1::mutate( ReturnStmt *returnStmt ) { 990 1001 if ( retval && returnStmt->get_expr() ) { … … 1002 1013 1003 1014 // find assignment operator for (polymorphic) return type 1004 DeclarationWithType *assignDecl= 0;1015 ApplicationExpr *assignExpr = 0; 1005 1016 if ( TypeInstType *typeInst = dynamic_cast< TypeInstType *>( retval->get_type() ) ) { 1017 // find assignment operator for type variable 1006 1018 std::map< std::string, DeclarationWithType *>::const_iterator assignIter = assignOps.find( typeInst->get_name() ); 1007 1019 if ( assignIter == assignOps.end() ) { 1008 1020 throw SemanticError( "Attempt to return dtype or ftype object in ", returnStmt->get_expr() ); 1009 1021 } // if 1010 assign Decl = assignIter->second;1022 assignExpr = new ApplicationExpr( new VariableExpr( assignIter->second ) ); 1011 1023 } else if ( ReferenceToType *refType = dynamic_cast< ReferenceToType *>( retval->get_type() ) ) { 1024 // find assignment operator for generic type 1012 1025 ScopedMap< std::string, DeclarationWithType *>::const_iterator assignIter = scopedAssignOps.find( refType->get_name() ); 1013 1026 if ( assignIter == scopedAssignOps.end() ) { 1014 1027 throw SemanticError( "Attempt to return dtype or ftype generic object in ", returnStmt->get_expr() ); 1015 1028 } 1029 1030 // wrap it up in an application expression 1016 1031 DeclarationWithType *functionDecl = assignIter->second; 1017 // line below cloned from FixFunction.cc 1018 assignDecl = new ObjectDecl( functionDecl->get_name(), functionDecl->get_storageClass(), functionDecl->get_linkage(), 0, 1019 new PointerType( Type::Qualifiers(), functionDecl->get_type()->clone() ), 0 ); 1020 assignDecl->set_mangleName( functionDecl->get_mangleName() ); 1032 assignExpr = new ApplicationExpr( wrapFunctionDecl( functionDecl ) ); 1033 assignExpr->set_env( env->clone() ); 1034 1035 // find each of its needed secondary assignment operators 1036 std::list< Expression* > &tyParams = refType->get_parameters(); 1037 std::list< TypeDecl* > &forallParams = functionDecl->get_type()->get_forall(); 1038 std::list< Expression* >::const_iterator tyIt = tyParams.begin(); 1039 std::list< TypeDecl* >::const_iterator forallIt = forallParams.begin(); 1040 for ( ; tyIt != tyParams.end() && forallIt != forallParams.end(); ++tyIt, ++forallIt ) { 1041 if ( (*forallIt)->get_kind() != TypeDecl::Any ) continue; // skip types with no assign op (ftype/dtype) 1042 1043 std::list< DeclarationWithType* > &asserts = (*forallIt)->get_assertions(); 1044 assert( ! asserts.empty() && "Type param needs assignment operator assertion" ); 1045 DeclarationWithType *actualDecl = asserts.front(); 1046 ReferenceToType *actualType = isAssignment( actualDecl ); 1047 assert( actualType && "First assertion of type with assertions should be assignment operator" ); 1048 TypeExpr *formalTypeExpr = dynamic_cast< TypeExpr* >( *tyIt ); 1049 assert( formalTypeExpr && "type parameters must be type expressions" ); 1050 Type *formalType = formalTypeExpr->get_type(); 1051 assignExpr->get_env()->add( actualType->get_name(), formalType ); 1052 1053 DeclarationWithType *assertAssign = 0; 1054 if ( TypeInstType *formalTypeInstType = dynamic_cast< TypeInstType* >( formalType ) ) { 1055 std::map< std::string, DeclarationWithType *>::const_iterator assertAssignIt = assignOps.find( formalTypeInstType->get_name() ); 1056 if ( assertAssignIt == assignOps.end() ) { 1057 throw SemanticError( "No assignment operation found for ", formalTypeInstType ); 1058 } 1059 assertAssign = assertAssignIt->second; 1060 //assignExpr->get_env()->add( formalTypeInstType->get_name(), actualType ); 1061 } else if ( ReferenceToType *formalReferenceType = dynamic_cast< ReferenceToType* >( formalType ) ) { 1062 ScopedMap< std::string, DeclarationWithType *>::const_iterator assertAssignIt = scopedAssignOps.find( formalReferenceType->get_name() ); 1063 if ( assertAssignIt == scopedAssignOps.end() ) { 1064 throw SemanticError( "No assignment operation found for ", formalReferenceType ); 1065 } 1066 assertAssign = assertAssignIt->second; 1067 } else assert( false && "returning polymorphic types with non struct/polymorphic parameters not yet supported" ); 1068 1069 1070 assignExpr->get_inferParams()[ actualDecl->get_uniqueId() ] 1071 = ParamEntry( assertAssign->get_uniqueId(), assertAssign->get_type()->clone(), actualDecl->get_type()->clone(), wrapFunctionDecl( assertAssign ) ); 1072 } 1021 1073 } 1022 assert( assign Decl);1074 assert( assignExpr ); 1023 1075 1024 1076 // replace return statement with appropriate assignment to out parameter 1025 ApplicationExpr *assignExpr = new ApplicationExpr( new VariableExpr( assignDecl ) );1026 1077 Expression *retParm = new NameExpr( retval->get_name() ); 1027 1078 retParm->get_results().push_back( new PointerType( Type::Qualifiers(), retval->get_type()->clone() ) ); … … 1283 1334 } 1284 1335 1336 /// Finds the member in the base list that matches the given declaration; returns its index, or -1 if not present 1337 long findMember( DeclarationWithType *memberDecl, std::list< Declaration* > &baseDecls ) { 1338 long i = 0; 1339 for(std::list< Declaration* >::const_iterator decl = baseDecls.begin(); decl != baseDecls.end(); ++decl, ++i ) { 1340 if ( memberDecl->get_name() != (*decl)->get_name() ) continue; 1341 1342 if ( DeclarationWithType *declWithType = dynamic_cast< DeclarationWithType* >( *decl ) ) { 1343 if ( memberDecl->get_mangleName() == declWithType->get_mangleName() ) return i; 1344 else continue; 1345 } else return i; 1346 } 1347 return -1; 1348 } 1349 1350 /// Returns an index expression into the offset array for a type 1351 Expression *makeOffsetIndex( Type *objectType, long i ) { 1352 std::stringstream offset_namer; 1353 offset_namer << i; 1354 ConstantExpr *fieldIndex = new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), offset_namer.str() ) ); 1355 UntypedExpr *fieldOffset = new UntypedExpr( new NameExpr( "?[?]" ) ); 1356 fieldOffset->get_args().push_back( new NameExpr( offsetofName( objectType ) ) ); 1357 fieldOffset->get_args().push_back( fieldIndex ); 1358 return fieldOffset; 1359 } 1360 1361 /// Returns an expression dereferenced n times 1362 Expression *makeDerefdVar( Expression *derefdVar, long n ) { 1363 for ( int i = 1; i < n; ++i ) { 1364 UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) ); 1365 derefExpr->get_args().push_back( derefdVar ); 1366 derefdVar = derefExpr; 1367 } 1368 return derefdVar; 1369 } 1370 1285 1371 Expression *MemberExprFixer::mutate( MemberExpr *memberExpr ) { 1286 1372 // mutate, exiting early if no longer MemberExpr … … 1301 1387 if ( ! objectType ) return memberExpr; 1302 1388 1303 // get base aggregate for type so members can be looked up1304 AggregateDecl *memberBase = 0;1305 1389 if ( StructInstType *structType = dynamic_cast< StructInstType* >( objectType ) ) { 1306 memberBase = structType->get_baseStruct(); 1390 // look up offset index 1391 long i = findMember( memberExpr->get_member(), structType->get_baseStruct()->get_members() ); 1392 if ( i == -1 ) return memberExpr; 1393 1394 // replace member expression with pointer to base plus offset 1395 UntypedExpr *fieldLoc = new UntypedExpr( new NameExpr( "?+?" ) ); 1396 fieldLoc->get_args().push_back( makeDerefdVar( varExpr->clone(), varDepth ) ); 1397 fieldLoc->get_args().push_back( makeOffsetIndex( objectType, i ) ); 1398 1399 delete memberExpr; 1400 return fieldLoc; 1307 1401 } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( objectType ) ) { 1308 memberBase = unionType->get_baseUnion(); 1402 // union members are all at offset zero, so build appropriately-dereferenced variable 1403 Expression *derefdVar = makeDerefdVar( varExpr->clone(), varDepth ); 1404 delete memberExpr; 1405 return derefdVar; 1309 1406 } else return memberExpr; 1310 1311 // look up numeric index of member in base aggregate 1312 DeclarationWithType *memberDecl = memberExpr->get_member(); 1313 std::list< Declaration* > &baseDecls = memberBase->get_members(); 1314 std::list< Declaration* >::const_iterator decl = baseDecls.begin(); 1315 unsigned long i = 0; 1316 for( ; decl != baseDecls.end(); ++decl, ++i ) { 1317 if ( memberDecl->get_name() != (*decl)->get_name() ) continue; 1318 1319 if ( DeclarationWithType *declWithType = dynamic_cast< DeclarationWithType* >( *decl ) ) { 1320 if ( memberDecl->get_mangleName() == declWithType->get_mangleName() ) break; 1321 else continue; 1322 } else break; 1323 } 1324 if ( decl == baseDecls.end() ) return memberExpr; 1325 1326 // replace member expression with pointer to base plus offset 1327 // get offset for field 1328 std::stringstream offset_namer; 1329 offset_namer << i; 1330 ConstantExpr *fieldIndex = new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), offset_namer.str() ) ); 1331 UntypedExpr *fieldOffset = new UntypedExpr( new NameExpr( "?[?]" ) ); 1332 fieldOffset->get_args().push_back( new NameExpr( offsetofName( objectType ) ) ); 1333 fieldOffset->get_args().push_back( fieldIndex ); 1334 // build appropriately-dereferenced variable 1335 Expression *derefdVar = varExpr->clone(); 1336 for ( int i = 1; i < varDepth; ++i ) { 1337 UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) ); 1338 derefExpr->get_args().push_back( derefdVar ); 1339 derefdVar = derefExpr; 1340 } 1341 // add offset to deref'd variable 1342 UntypedExpr *fieldLoc = new UntypedExpr( new NameExpr( "?+?" ) ); 1343 fieldLoc->get_args().push_back( derefdVar ); 1344 fieldLoc->get_args().push_back( fieldOffset ); 1345 1346 delete memberExpr; 1347 return fieldLoc; 1407 } 1408 1409 Expression *MemberExprFixer::mutate( OffsetofExpr *offsetofExpr ) { 1410 // mutate, exiting early if no longer OffsetofExpr 1411 Expression *expr = Mutator::mutate( offsetofExpr ); 1412 offsetofExpr = dynamic_cast< OffsetofExpr* >( expr ); 1413 if ( ! offsetofExpr ) return expr; 1414 1415 // only mutate expressions for polymorphic structs/unions 1416 Type *ty = isPolyType( offsetofExpr->get_type(), scopeTyVars ); 1417 if ( ! ty ) return offsetofExpr; 1418 1419 if ( StructInstType *structType = dynamic_cast< StructInstType* >( ty ) ) { 1420 // replace offsetof expression by index into offset array 1421 long i = findMember( offsetofExpr->get_member(), structType->get_baseStruct()->get_members() ); 1422 if ( i == -1 ) return offsetofExpr; 1423 1424 Expression *offsetInd = makeOffsetIndex( ty, i ); 1425 delete offsetofExpr; 1426 return offsetInd; 1427 } else if ( UnionInstType *unionType = dynamic_cast< UnionInstType* >( ty ) ) { 1428 // all union members are at offset zero 1429 delete offsetofExpr; 1430 return new ConstantExpr( Constant( new BasicType( Type::Qualifiers(), BasicType::LongUnsignedInt ), std::string("0") ) ); 1431 } else return offsetofExpr; 1348 1432 } 1349 1433
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