Changeset c10ee66 for src/GenPoly

Timestamp:

May 9, 2017, 1:56:16 PM (8 years ago)

Author:

Rob Schluntz <rschlunt@…>

Branches:

ADT, aaron-thesis, arm-eh, ast-experimental, cleanup-dtors, deferred_resn, demangler, enum, forall-pointer-decay, jacob/cs343-translation, jenkins-sandbox, master, new-ast, new-ast-unique-expr, new-env, no_list, persistent-indexer, pthread-emulation, qualifiedEnum, resolv-new, with_gc

Children:

298581c

Parents:

4f9636f

Message:

fix nested generic member expressions, fix generic union member expression, silence some generated code warnings

File:

• src/GenPoly/Box.cc (modified) (8 diffs)

src/GenPoly/Box.cc

@@ -765 +765 @@
                                                 arg = new AddressExpr( arg );
                                         }
+                                        if ( ! ResolvExpr::typesCompatible( param, arg->get_result(), SymTab::Indexer() ) ) {
+                                                // silence warnings by casting boxed parameters when the actual type does not match up with the formal type.
+                                                arg = new CastExpr( arg, param->clone() );
+                                        }
                                 } else {
                                         // use type computed in unification to declare boxed variables
@@ -902 +906 @@
                                 } // if
                                 UntypedExpr *assign = new UntypedExpr( new NameExpr( "?=?" ) );
-                                UntypedExpr *deref = new UntypedExpr( new NameExpr( "*?" ) );
-                                deref->get_args().push_back( new CastExpr( new VariableExpr( *param++ ), new PointerType( Type::Qualifiers(), realType->get_returnVals().front()->get_type()->clone() ) ) );
+                                UntypedExpr *deref = UntypedExpr::createDeref( new CastExpr( new VariableExpr( *param++ ), new PointerType( Type::Qualifiers(), realType->get_returnVals().front()->get_type()->clone() ) ) );
                                 assign->get_args().push_back( deref );
                                 addAdapterParams( adapteeApp, arg, param, adapterType->get_parameters().end(), realParam, tyVars );
@@ -1217 +1220 @@
 
                 Statement * Pass1::mutate( ReturnStmt *returnStmt ) {
-                        // maybe need access to the env when mutating the expr
-                        if ( Expression * expr = returnStmt->get_expr() ) {
-                                if ( expr->get_env() ) {
-                                        env = expr->get_env();
-                                }
-                        }
-
                         if ( retval && returnStmt->get_expr() ) {
                                 assert( returnStmt->get_expr()->has_result() && ! returnStmt->get_expr()->get_result()->isVoid() );
@@ -1539 +1535 @@
                                         Type *declType = objectDecl->get_type();
                                         std::string bufName = bufNamer.newName();
-                                        ObjectDecl *newBuf = new ObjectDecl( bufName, Type::StorageClasses(), LinkageSpec::C, 0, 
-                                                new ArrayType( Type::Qualifiers(), new BasicType( Type::Qualifiers(), BasicType::Kind::Char), new NameExpr( sizeofName( mangleType(declType) ) ), 
+                                        ObjectDecl *newBuf = new ObjectDecl( bufName, Type::StorageClasses(), LinkageSpec::C, 0,
+                                                new ArrayType( Type::Qualifiers(), new BasicType( Type::Qualifiers(), BasicType::Kind::Char), new NameExpr( sizeofName( mangleType(declType) ) ),
                                                 true, false, std::list<Attribute*>{ new Attribute( std::string{"aligned"}, std::list<Expression*>{ new ConstantExpr( Constant::from_int(8) ) } ) } ), 0 );
                                         stmtsToAdd.push_back( new DeclStmt( noLabels, newBuf ) );
@@ -1578 +1574 @@
                 }
 
-                /// Returns an expression dereferenced n times
-                Expression *makeDerefdVar( Expression *derefdVar, long n ) {
-                        for ( int i = 1; i < n; ++i ) {
-                                UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) );
-                                derefExpr->get_args().push_back( derefdVar );
-                                // xxx - should set results on derefExpr
-                                derefdVar = derefExpr;
-                        }
-                        return derefdVar;
-                }
-
                 Expression *PolyGenericCalculator::mutate( MemberExpr *memberExpr ) {
                         // mutate, exiting early if no longer MemberExpr
@@ -1595 +1580 @@
                         if ( ! memberExpr ) return expr;
 
-                        // get declaration for base struct, exiting early if not found
-                        int varDepth;
-                        VariableExpr *varExpr = getBaseVar( memberExpr->get_aggregate(), &varDepth );
-                        if ( ! varExpr ) return memberExpr;
-                        ObjectDecl *objectDecl = dynamic_cast< ObjectDecl* >( varExpr->get_var() );
-                        if ( ! objectDecl ) return memberExpr;
-
                         // only mutate member expressions for polymorphic types
                         int tyDepth;
-                        Type *objectType = hasPolyBase( objectDecl->get_type(), scopeTyVars, &tyDepth );
+                        Type *objectType = hasPolyBase( memberExpr->get_aggregate()->get_result(), scopeTyVars, &tyDepth );
                         if ( ! objectType ) return memberExpr;
                         findGeneric( objectType ); // ensure layout for this type is available
@@ -1622 +1600 @@
                                 fieldLoc->get_args().push_back( aggr );
                                 fieldLoc->get_args().push_back( makeOffsetIndex( objectType, i ) );
+                                fieldLoc->set_result( memberExpr->get_result()->clone() );
                                 newMemberExpr = fieldLoc;
                         } else if ( dynamic_cast< UnionInstType* >( objectType ) ) {
-                                // union members are all at offset zero, so build appropriately-dereferenced variable
-                                newMemberExpr = makeDerefdVar( varExpr->clone(), varDepth );
+                                // union members are all at offset zero, so just use the aggregate expr
+                                Expression * aggr = memberExpr->get_aggregate()->clone();
+                                delete aggr->get_env(); // xxx - there's a problem with keeping the env for some reason, so for now just get rid of it
+                                aggr->set_env( nullptr );
+                                newMemberExpr = aggr;
+                                newMemberExpr->set_result( memberExpr->get_result()->clone() );
                         } else return memberExpr;
                         assert( newMemberExpr );
@@ -1633 +1616 @@
                                 // Not all members of a polymorphic type are themselves of polymorphic type; in this case the member expression should be wrapped and dereferenced to form an lvalue
                                 CastExpr *ptrCastExpr = new CastExpr( newMemberExpr, new PointerType( Type::Qualifiers(), memberType->clone() ) );
-                                UntypedExpr *derefExpr = new UntypedExpr( new NameExpr( "*?" ) );
-                                derefExpr->get_args().push_back( ptrCastExpr );
+                                UntypedExpr *derefExpr = UntypedExpr::createDeref( ptrCastExpr );
                                 newMemberExpr = derefExpr;
                         }