- func.return_type_declaration = resolve_type(func.return_type);
- TraversingVisitor::visit(func);
-}
-
-
-VariableResolver::VariableResolver():
- stage(0),
- r_any_resolved(false),
- record_target(false),
- r_self_referencing(false),
- r_assignment_target(0)
-{ }
-
-bool VariableResolver::apply(Stage &s)
-{
- stage = &s;
- s.interface_blocks.clear();
- r_any_resolved = false;
- s.content.visit(*this);
- return r_any_resolved;
-}
-
-void VariableResolver::enter(Block &block)
-{
- block.variables.clear();
-}
-
-void VariableResolver::visit_and_replace(RefPtr<Expression> &expr)
-{
- r_replacement_expr = 0;
- expr->visit(*this);
- if(r_replacement_expr)
- expr = r_replacement_expr;
- r_replacement_expr = 0;
-}
-
-void VariableResolver::visit(VariableReference &var)
-{
- VariableDeclaration *declaration = 0;
-
- /* Look for variable declarations in the block hierarchy first. Interface
- blocks are always defined in the top level so we can't accidentally skip
- one. */
- for(Block *block=current_block; (!declaration && block); block=block->parent)
- {
- map<string, VariableDeclaration *>::iterator i = block->variables.find(var.name);
- if(i!=block->variables.end())
- declaration = i->second;
- }
-
- if(!declaration)
- {
- const map<string, InterfaceBlock *> &blocks = stage->interface_blocks;
- map<string, InterfaceBlock *>::const_iterator i = blocks.find("_"+var.name);
- if(i!=blocks.end())
- {
- /* The name refers to an interface block with an instance name rather
- than a variable. Prepare a new syntax tree node accordingly. */
- InterfaceBlockReference *iface_ref = new InterfaceBlockReference;
- iface_ref->source = var.source;
- iface_ref->line = var.line;
- iface_ref->name = var.name;
- iface_ref->declaration = i->second;
- r_replacement_expr = iface_ref;
- }
- else
- {
- // Look for the variable in anonymous interface blocks.
- for(i=blocks.begin(); (!declaration && i!=blocks.end()); ++i)
- if(i->second->instance_name.empty())
- {
- map<string, VariableDeclaration *>::iterator j = i->second->members.variables.find(var.name);
- if(j!=i->second->members.variables.end())
- declaration = j->second;
- }
- }
- }
-
- r_any_resolved |= (declaration!=var.declaration);
- var.declaration = declaration;
-
- if(record_target)
- {
- if(r_assignment_target)
- {
- /* More than one variable reference found in assignment target.
- Unable to determine what the primary target is. */
- record_target = false;
- r_assignment_target = 0;
- }
- else
- r_assignment_target = var.declaration;
- }
- else if(var.declaration && var.declaration==r_assignment_target)
- r_self_referencing = true;
-}
-
-void VariableResolver::visit(InterfaceBlockReference &iface)
-{
- map<string, InterfaceBlock *>::iterator i = stage->interface_blocks.find("_"+iface.name);
- InterfaceBlock *declaration = (i!=stage->interface_blocks.end() ? i->second : 0);
- r_any_resolved |= (declaration!=iface.declaration);
- iface.declaration = declaration;
-}
-
-void VariableResolver::visit(MemberAccess &memacc)
-{
- visit_and_replace(memacc.left);
-
- map<string, VariableDeclaration *> *members = 0;
- if(StructDeclaration *strct = dynamic_cast<StructDeclaration *>(memacc.left->type))
- members = &strct->members.variables;
- else if(InterfaceBlockReference *iface_ref = dynamic_cast<InterfaceBlockReference *>(memacc.left.get()))
- {
- if(iface_ref->declaration)
- members = &iface_ref->declaration->members.variables;
- }
-
- VariableDeclaration *declaration = 0;
- if(members)
- {
- map<string, VariableDeclaration *>::iterator i = members->find(memacc.member);
- if(i!=members->end())
- declaration = i->second;
- }
-
- r_any_resolved |= (declaration!=memacc.declaration);
- memacc.declaration = declaration;
-}
-
-void VariableResolver::visit(UnaryExpression &unary)
-{
- visit_and_replace(unary.expression);
-}
-
-void VariableResolver::visit(BinaryExpression &binary)
-{
- if(binary.oper->token[0]=='[')
- {
- {
- /* The subscript expression is not a part of the primary assignment
- target. */
- SetFlag set(record_target, false);
- visit_and_replace(binary.right);
- }
- visit_and_replace(binary.left);
- }
- else
- {
- visit_and_replace(binary.left);
- visit_and_replace(binary.right);
- }
-}
-
-void VariableResolver::visit(Assignment &assign)
-{
- {
- SetFlag set(record_target);
- r_assignment_target = 0;
- visit_and_replace(assign.left);
- r_any_resolved |= (r_assignment_target!=assign.target_declaration);
- assign.target_declaration = r_assignment_target;
- }
-
- r_self_referencing = false;
- visit_and_replace(assign.right);
- assign.self_referencing = (r_self_referencing || assign.oper->token[0]!='=');
-}
-
-void VariableResolver::visit(FunctionCall &call)
-{
- for(NodeArray<Expression>::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
- visit_and_replace(*i);
-}
-
-void VariableResolver::visit(VariableDeclaration &var)
-{
- if(!block_interface.empty() && var.interface.empty())
- var.interface = block_interface;
-
- TraversingVisitor::visit(var);
- current_block->variables.insert(make_pair(var.name, &var));
-}
-
-void VariableResolver::visit(InterfaceBlock &iface)
-{
- /* Block names can be reused in different interfaces. Prefix the name with
- the first character of the interface to avoid conflicts. */
- stage->interface_blocks.insert(make_pair(iface.interface+iface.name, &iface));
- if(!iface.instance_name.empty())
- stage->interface_blocks.insert(make_pair("_"+iface.instance_name, &iface));
-
- SetForScope<string> set_iface(block_interface, iface.interface);
- TraversingVisitor::visit(iface);
-}
-
-
-ExpressionResolver::ExpressionResolver():
- stage(0),
- r_any_resolved(false)
-{ }
-
-bool ExpressionResolver::apply(Stage &s)
-{
- stage = &s;
- r_any_resolved = false;
- s.content.visit(*this);
- return r_any_resolved;
-}
-
-bool ExpressionResolver::is_scalar(BasicTypeDeclaration &type)
-{
- return (type.kind==BasicTypeDeclaration::INT || type.kind==BasicTypeDeclaration::FLOAT);
-}
-
-bool ExpressionResolver::is_vector_or_matrix(BasicTypeDeclaration &type)
-{
- return (type.kind==BasicTypeDeclaration::VECTOR || type.kind==BasicTypeDeclaration::MATRIX);
-}
-
-BasicTypeDeclaration *ExpressionResolver::get_element_type(BasicTypeDeclaration &type)
-{
- if(is_vector_or_matrix(type) || type.kind==BasicTypeDeclaration::ARRAY)
- {
- BasicTypeDeclaration *basic_base = dynamic_cast<BasicTypeDeclaration *>(type.base_type);
- return (basic_base ? get_element_type(*basic_base) : 0);
- }
- else
- return &type;
-}
-
-bool ExpressionResolver::can_convert(BasicTypeDeclaration &from, BasicTypeDeclaration &to)
-{
- if(from.kind==BasicTypeDeclaration::INT && to.kind==BasicTypeDeclaration::FLOAT)
- return from.size<=to.size;
- else if(from.kind!=to.kind)
- return false;
- else if((from.kind==BasicTypeDeclaration::VECTOR || from.kind==BasicTypeDeclaration::MATRIX) && from.size==to.size)
- {
- BasicTypeDeclaration *from_base = dynamic_cast<BasicTypeDeclaration *>(from.base_type);
- BasicTypeDeclaration *to_base = dynamic_cast<BasicTypeDeclaration *>(to.base_type);
- return (from_base && to_base && can_convert(*from_base, *to_base));
- }
- else
- return false;
-}
-
-ExpressionResolver::Compatibility ExpressionResolver::get_compatibility(BasicTypeDeclaration &left, BasicTypeDeclaration &right)
-{
- if(&left==&right)
- return SAME_TYPE;
- else if(can_convert(left, right))
- return LEFT_CONVERTIBLE;
- else if(can_convert(right, left))
- return RIGHT_CONVERTIBLE;
- else
- return NOT_COMPATIBLE;
-}
-
-BasicTypeDeclaration *ExpressionResolver::find_type(BasicTypeDeclaration::Kind kind, unsigned size)
-{
- for(vector<BasicTypeDeclaration *>::const_iterator i=basic_types.begin(); i!=basic_types.end(); ++i)
- if((*i)->kind==kind && (*i)->size==size)
- return *i;
- return 0;
-}
-
-BasicTypeDeclaration *ExpressionResolver::find_type(BasicTypeDeclaration &elem_type, BasicTypeDeclaration::Kind kind, unsigned size)
-{
- for(vector<BasicTypeDeclaration *>::const_iterator i=basic_types.begin(); i!=basic_types.end(); ++i)
- if(get_element_type(**i)==&elem_type && (*i)->kind==kind && (*i)->size==size)
- return *i;
- return 0;
-}
-
-void ExpressionResolver::convert_to(RefPtr<Expression> &expr, BasicTypeDeclaration &type)
-{
- RefPtr<FunctionCall> call = new FunctionCall;
- call->name = type.name;
- call->constructor = true;
- call->arguments.push_back(0);
- call->arguments.back() = expr;
- call->type = &type;
- expr = call;
-}
-
-bool ExpressionResolver::convert_to_element(RefPtr<Expression> &expr, BasicTypeDeclaration &elem_type)
-{
- if(BasicTypeDeclaration *expr_type = dynamic_cast<BasicTypeDeclaration *>(expr->type))
- {
- BasicTypeDeclaration *to_type = &elem_type;
- if(is_vector_or_matrix(*expr_type))
- to_type = find_type(elem_type, expr_type->kind, expr_type->size);
- if(to_type)
- {
- convert_to(expr, *to_type);
- return true;
- }
- }
-
- return false;
-}
-
-void ExpressionResolver::resolve(Expression &expr, TypeDeclaration *type, bool lvalue)
-{
- r_any_resolved |= (type!=expr.type || lvalue!=expr.lvalue);
- expr.type = type;
- expr.lvalue = lvalue;
-}
-
-void ExpressionResolver::visit(Literal &literal)
-{
- if(literal.value.check_type<bool>())
- resolve(literal, find_type(BasicTypeDeclaration::BOOL, 1), false);
- else if(literal.value.check_type<int>())
- resolve(literal, find_type(BasicTypeDeclaration::INT, 32), false);
- else if(literal.value.check_type<float>())
- resolve(literal, find_type(BasicTypeDeclaration::FLOAT, 32), false);
-}
-
-void ExpressionResolver::visit(ParenthesizedExpression &parexpr)
-{
- TraversingVisitor::visit(parexpr);
- resolve(parexpr, parexpr.expression->type, parexpr.expression->lvalue);
-}
-
-void ExpressionResolver::visit(VariableReference &var)
-{
- if(var.declaration)
- resolve(var, var.declaration->type_declaration, true);
-}
-
-void ExpressionResolver::visit(InterfaceBlockReference &iface)
-{
- resolve(iface, 0, true);
-}
-
-void ExpressionResolver::visit(MemberAccess &memacc)
-{
- TraversingVisitor::visit(memacc);
-
- if(memacc.declaration)
- resolve(memacc, memacc.declaration->type_declaration, memacc.left->lvalue);
-}
-
-void ExpressionResolver::visit(UnaryExpression &unary)
-{
- TraversingVisitor::visit(unary);
-
- BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(unary.expression->type);
- if(!basic)
- return;
-
- char oper = unary.oper->token[0];
- if(oper=='!')
- {
- if(basic->kind!=BasicTypeDeclaration::BOOL)
- return;
- }
- else if(oper=='~')
- {
- if(basic->kind!=BasicTypeDeclaration::INT)
- return;
- }
- else if(oper=='+' || oper=='-')
- {
- BasicTypeDeclaration *elem = get_element_type(*basic);
- if(!elem || !is_scalar(*elem))
- return;
- }
- resolve(unary, basic, unary.expression->lvalue);
-}
-
-void ExpressionResolver::visit(BinaryExpression &binary, bool assign)
-{
- /* Binary operators are only defined for basic types (not for image or
- structure types). */
- BasicTypeDeclaration *basic_left = dynamic_cast<BasicTypeDeclaration *>(binary.left->type);
- BasicTypeDeclaration *basic_right = dynamic_cast<BasicTypeDeclaration *>(binary.right->type);
- if(!basic_left || !basic_right)
- return;
-
- char oper = binary.oper->token[0];
- if(oper=='[')
- {
- /* Subscripting operates on vectors, matrices and arrays, and the right
- operand must be an integer. */
- if((!is_vector_or_matrix(*basic_left) && basic_left->kind!=BasicTypeDeclaration::ARRAY) || basic_right->kind!=BasicTypeDeclaration::INT)
- return;
-
- resolve(binary, basic_left->base_type, binary.left->lvalue);
- return;
- }
- else if(basic_left->kind==BasicTypeDeclaration::ARRAY || basic_right->kind==BasicTypeDeclaration::ARRAY)
- // No other binary operator can be used with arrays.
- return;
-
- BasicTypeDeclaration *elem_left = get_element_type(*basic_left);
- BasicTypeDeclaration *elem_right = get_element_type(*basic_right);
- if(!elem_left || !elem_right)
- return;
-
- Compatibility compat = get_compatibility(*basic_left, *basic_right);
- Compatibility elem_compat = get_compatibility(*elem_left, *elem_right);
- if(elem_compat==NOT_COMPATIBLE)
- return;
- if(assign && (compat==LEFT_CONVERTIBLE || elem_compat==LEFT_CONVERTIBLE))
- return;
-
- TypeDeclaration *type = 0;
- char oper2 = binary.oper->token[1];
- if((oper=='<' && oper2!='<') || (oper=='>' && oper2!='>'))
- {
- /* Relational operators compare two scalar integer or floating-point
- values. */
- if(!is_scalar(*elem_left) || !is_scalar(*elem_right) || compat==NOT_COMPATIBLE)
- return;
-
- type = find_type(BasicTypeDeclaration::BOOL, 1);
- }
- else if((oper=='=' || oper=='!') && oper2=='=')
- {
- // Equality comparison can be done on any compatible types.
- if(compat==NOT_COMPATIBLE)
- return;
-
- type = find_type(BasicTypeDeclaration::BOOL, 1);
- }
- else if(oper2=='&' || oper2=='|' || oper2=='^')
- {
- // Logical operators can only be applied to booleans.
- if(basic_left->kind!=BasicTypeDeclaration::BOOL || basic_right->kind!=BasicTypeDeclaration::BOOL)
- return;
-
- type = basic_left;
- }
- else if((oper=='&' || oper=='|' || oper=='^' || oper=='%') && !oper2)
- {
- // Bitwise operators and modulo can only be applied to integers.
- if(basic_left->kind!=BasicTypeDeclaration::INT || basic_right->kind!=BasicTypeDeclaration::INT)
- return;
-
- type = (compat==LEFT_CONVERTIBLE ? basic_right : basic_left);
- }
- else if((oper=='<' || oper=='>') && oper2==oper)
- {
- // Shifts apply to integer scalars and vectors, with some restrictions.
- if(elem_left->kind!=BasicTypeDeclaration::INT || elem_right->kind!=BasicTypeDeclaration::INT)
- return;
- unsigned left_size = (basic_left->kind==BasicTypeDeclaration::INT ? 1 : basic_left->kind==BasicTypeDeclaration::VECTOR ? basic_left->size : 0);
- unsigned right_size = (basic_right->kind==BasicTypeDeclaration::INT ? 1 : basic_right->kind==BasicTypeDeclaration::VECTOR ? basic_right->size : 0);
- if(!left_size || (left_size==1 && right_size!=1) || (left_size>1 && right_size!=1 && right_size!=left_size))
- return;
-
- type = basic_left;
- // Don't perform conversion even if the operands are of different sizes.
- compat = SAME_TYPE;
- }
- else if(oper=='+' || oper=='-' || oper=='*' || oper=='/')