| 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 | // LabelTypeChecker.cc --
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| 8 | //
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| 9 | // Author : Rodolfo G. Esteves
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| 10 | // Created On : Mon May 18 07:44:20 2015
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| 11 | // Last Modified By : Rob Schluntz
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| 12 | // Last Modified On : Wed Jun 24 16:24:48 2015
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| 13 | // Update Count : 3
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| 14 | //
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| 15 |
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| 16 | #include <list>
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| 17 | #include <cassert>
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| 18 |
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| 19 | #include "SynTree/Type.h"
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| 20 | #include "SynTree/Statement.h"
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| 21 | #include "SynTree/Expression.h"
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| 22 | #include "SynTree/Declaration.h"
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| 23 |
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| 24 | #include "LabelTypeChecker.h"
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| 25 |
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| 26 | namespace ControlStruct {
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| 27 | void LabelTypeChecker::visit(UntypedExpr *untypedExpr) {
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| 28 | assert( untypedExpr != 0 );
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| 29 | NameExpr *fname;
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| 30 | if ( ((fname = dynamic_cast<NameExpr *>(untypedExpr->get_function())) != 0)
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| 31 | && fname->get_name() == std::string("&&") )
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| 32 | std::cerr << "Taking the label of an address." << std::endl;
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| 33 | else {
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| 34 | acceptAll( untypedExpr->get_results(), *this );
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| 35 | acceptAll( untypedExpr->get_args(), *this );
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| 36 | } // if
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| 37 | return;
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| 38 | }
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| 39 |
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| 40 | void LabelTypeChecker::visit(CompoundStmt *compoundStmt) {
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| 41 | index.enterScope();
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| 42 | acceptAll( compoundStmt->get_kids(), *this );
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| 43 | index.leaveScope();
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| 44 | }
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| 45 |
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| 46 | void LabelTypeChecker::visit(DeclStmt *declStmt) {
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| 47 | declStmt->accept( index );
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| 48 |
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| 49 | //ObjectDecl *odecl = 0;
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| 50 | // if ( ( odecl = dynamic_cast<ObjectDecl *>(declStmt->get_decl()) ) != 0 ) {
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| 51 | return;
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| 52 | }
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| 53 |
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| 54 | void LabelTypeChecker::visit(BranchStmt *branchStmt) {
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| 55 | if ( branchStmt->get_type() != BranchStmt::Goto ) return;
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| 56 | Expression *target;
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| 57 | if ( (target = branchStmt->get_computedTarget()) == 0 ) return;
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| 58 |
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| 59 | NameExpr *name;
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| 60 | if ( ((name = dynamic_cast<NameExpr *>(target)) == 0) )
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| 61 | return; // Not a name expression
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| 62 |
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| 63 | std::list< DeclarationWithType * > interps;
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| 64 | index.lookupId(name->get_name(), interps);
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| 65 | if ( interps.size() != 1)
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| 66 | // in case of multiple declarations
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| 67 | throw SemanticError("Illegal label expression: " + name->get_name() );
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| 68 |
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| 69 | PointerType *ptr;
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| 70 | if ( (ptr = dynamic_cast<PointerType *>(interps.front()->get_type())) != 0 )
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| 71 | if ( dynamic_cast<VoidType *>(ptr->get_base()) != 0 )
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| 72 | return;
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| 73 | else
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| 74 | throw SemanticError("Wrong type of parameter for computed goto");
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| 75 | else
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| 76 | throw SemanticError("Wrong type of parameter for computed goto");
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| 77 |
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| 78 | return;
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| 79 | }
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| 80 | } // namespace ControlStruct
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| 81 |
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| 82 | // Local Variables: //
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| 83 | // tab-width: 4 //
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| 84 | // mode: c++ //
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| 85 | // compile-command: "make install" //
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| 86 | // End: //
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