+#include <algorithm>
+#include <msp/core/raii.h>
+#include <msp/strings/utils.h>
+#include "resolve.h"
+
+using namespace std;
+
+namespace Msp {
+namespace GL {
+namespace SL {
+
+void BlockHierarchyResolver::enter(Block &block)
+{
+ r_any_resolved |= (current_block!=block.parent);
+ block.parent = current_block;
+}
+
+
+TypeResolver::TypeResolver():
+ stage(0),
+ iface_block(0),
+ r_any_resolved(false)
+{ }
+
+bool TypeResolver::apply(Stage &s)
+{
+ stage = &s;
+ s.types.clear();
+ r_any_resolved = false;
+ s.content.visit(*this);
+ return r_any_resolved;
+}
+
+TypeDeclaration *TypeResolver::get_or_create_array_type(TypeDeclaration &type)
+{
+ map<TypeDeclaration *, TypeDeclaration *>::iterator i = array_types.find(&type);
+ if(i!=array_types.end())
+ return i->second;
+
+ BasicTypeDeclaration *array = new BasicTypeDeclaration;
+ array->source = INTERNAL_SOURCE;
+ array->name = type.name+"[]";
+ array->kind = BasicTypeDeclaration::ARRAY;
+ array->base = type.name;
+ array->base_type = &type;
+ stage->content.body.insert(type_insert_point, array);
+ array_types[&type] = array;
+ return array;
+}
+
+void TypeResolver::resolve_type(TypeDeclaration *&type, const string &name, bool array)
+{
+ TypeDeclaration *resolved = 0;
+ map<string, TypeDeclaration *>::iterator i = stage->types.find(name);
+ if(i!=stage->types.end())
+ {
+ map<TypeDeclaration *, TypeDeclaration *>::iterator j = alias_map.find(i->second);
+ resolved = (j!=alias_map.end() ? j->second : i->second);
+ }
+
+ if(resolved && array)
+ resolved = get_or_create_array_type(*resolved);
+
+ r_any_resolved |= (resolved!=type);
+ type=resolved;
+}
+
+void TypeResolver::visit(Block &block)
+{
+ for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); ++i)
+ {
+ if(!block.parent)
+ type_insert_point = i;
+ (*i)->visit(*this);
+ }
+}
+
+void TypeResolver::visit(BasicTypeDeclaration &type)
+{
+ resolve_type(type.base_type, type.base, false);
+
+ if(type.kind==BasicTypeDeclaration::VECTOR && type.base_type)
+ if(BasicTypeDeclaration *basic_base = dynamic_cast<BasicTypeDeclaration *>(type.base_type))
+ if(basic_base->kind==BasicTypeDeclaration::VECTOR)
+ {
+ type.kind = BasicTypeDeclaration::MATRIX;
+ /* A matrix's base type is its column vector type. This will put
+ the column vector's size, i.e. the matrix's row count, in the high
+ half of the size. */
+ type.size |= basic_base->size<<16;
+ }
+
+ if(type.kind==BasicTypeDeclaration::ALIAS && type.base_type)
+ alias_map[&type] = type.base_type;
+ else if(type.kind==BasicTypeDeclaration::ARRAY && type.base_type)
+ array_types[type.base_type] = &type;
+
+ stage->types.insert(make_pair(type.name, &type));
+}
+
+void TypeResolver::visit(ImageTypeDeclaration &type)
+{
+ resolve_type(type.base_type, type.base, false);
+ stage->types.insert(make_pair(type.name, &type));
+}
+
+void TypeResolver::visit(StructDeclaration &strct)
+{
+ stage->types.insert(make_pair(strct.name, &strct));
+ TraversingVisitor::visit(strct);
+}
+
+void TypeResolver::visit(VariableDeclaration &var)
+{
+ resolve_type(var.type_declaration, var.type, var.array);
+ if(iface_block && var.interface==iface_block->interface)
+ var.interface.clear();
+}
+
+void TypeResolver::visit(InterfaceBlock &iface)
+{
+ if(iface.members)
+ {
+ SetForScope<InterfaceBlock *> set_iface(iface_block, &iface);
+ iface.members->visit(*this);
+
+ StructDeclaration *strct = new StructDeclaration;
+ strct->source = INTERNAL_SOURCE;
+ strct->name = format("_%s_%s", iface.interface, iface.block_name);
+ strct->members.body.splice(strct->members.body.begin(), iface.members->body);
+ stage->content.body.insert(type_insert_point, strct);
+ stage->types.insert(make_pair(strct->name, strct));
+
+ iface.members = 0;
+ strct->interface_block = &iface;
+ iface.struct_declaration = strct;
+ }
+
+ TypeDeclaration *type = iface.struct_declaration;
+ if(type && iface.array)
+ type = get_or_create_array_type(*type);
+ r_any_resolved = (type!=iface.type_declaration);
+ iface.type_declaration = type;
+}
+
+void TypeResolver::visit(FunctionDeclaration &func)
+{
+ resolve_type(func.return_type_declaration, func.return_type, false);
+ TraversingVisitor::visit(func);
+}
+
+
+VariableResolver::VariableResolver():
+ stage(0),
+ r_any_resolved(false),
+ record_target(false),
+ r_self_referencing(false)
+{ }
+
+bool VariableResolver::apply(Stage &s)
+{
+ stage = &s;
+ s.interface_blocks.clear();
+ r_any_resolved = false;
+ s.content.visit(*this);
+ for(vector<VariableDeclaration *>::const_iterator i=redeclared_builtins.begin(); i!=redeclared_builtins.end(); ++i)
+ (*i)->source = GENERATED_SOURCE;
+ NodeRemover().apply(s, nodes_to_remove);
+ return r_any_resolved;
+}
+
+void VariableResolver::enter(Block &block)
+{
+ block.variables.clear();
+}
+
+void VariableResolver::visit(RefPtr<Expression> &expr)
+{
+ r_replacement_expr = 0;
+ expr->visit(*this);
+ if(r_replacement_expr)
+ {
+ expr = r_replacement_expr;
+ /* Don't record assignment target when doing a replacement, because chain
+ information won't be correct. */
+ r_assignment_target.declaration = 0;
+ r_any_resolved = true;
+ }
+ r_replacement_expr = 0;
+}
+
+void VariableResolver::check_assignment_target(Statement *declaration)
+{
+ if(record_target)
+ {
+ if(r_assignment_target.declaration)
+ {
+ /* More than one reference found in assignment target. Unable to
+ determine what the primary target is. */
+ record_target = false;
+ r_assignment_target.declaration = 0;
+ }
+ else
+ r_assignment_target.declaration = declaration;
+ }
+ // TODO This check is overly broad and may prevent some optimizations.
+ else if(declaration && declaration==r_assignment_target.declaration)
+ r_self_referencing = true;
+}
+
+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() && i->second->struct_declaration)
+ {
+ const map<string, VariableDeclaration *> &iface_vars = i->second->struct_declaration->members.variables;
+ map<string, VariableDeclaration *>::const_iterator j = iface_vars.find(var.name);
+ if(j!=iface_vars.end())
+ declaration = j->second;
+ }
+ }
+ }
+
+ r_any_resolved |= (declaration!=var.declaration);
+ var.declaration = declaration;
+
+ check_assignment_target(var.declaration);
+}
+
+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;
+
+ check_assignment_target(iface.declaration);
+}
+
+void VariableResolver::add_to_chain(Assignment::Target::ChainType type, unsigned index)
+{
+ if(r_assignment_target.chain_len<7)
+ r_assignment_target.chain[r_assignment_target.chain_len] = type | min<unsigned>(index, 0x3F);
+ ++r_assignment_target.chain_len;
+}
+
+void VariableResolver::visit(MemberAccess &memacc)
+{
+ TraversingVisitor::visit(memacc);
+
+ VariableDeclaration *declaration = 0;
+ if(StructDeclaration *strct = dynamic_cast<StructDeclaration *>(memacc.left->type))
+ {
+ map<string, VariableDeclaration *>::iterator i = strct->members.variables.find(memacc.member);
+ if(i!=strct->members.variables.end())
+ {
+ declaration = i->second;
+
+ if(record_target)
+ {
+ unsigned index = 0;
+ for(NodeList<Statement>::const_iterator j=strct->members.body.begin(); (j!=strct->members.body.end() && j->get()!=i->second); ++j)
+ ++index;
+
+ add_to_chain(Assignment::Target::MEMBER, index);
+ }
+ }
+ }
+ else if(BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(memacc.left->type))
+ {
+ bool scalar_swizzle = ((basic->kind==BasicTypeDeclaration::INT || basic->kind==BasicTypeDeclaration::FLOAT) && memacc.member.size()==1);
+ bool vector_swizzle = (basic->kind==BasicTypeDeclaration::VECTOR && memacc.member.size()<=4);
+ if(scalar_swizzle || vector_swizzle)
+ {
+ static const char component_names[] = { 'x', 'r', 's', 'y', 'g', 't', 'z', 'b', 'p', 'w', 'a', 'q' };
+
+ bool ok = true;
+ UInt8 components[4] = { };
+ for(unsigned i=0; (ok && i<memacc.member.size()); ++i)
+ ok = ((components[i] = (find(component_names, component_names+12, memacc.member[i])-component_names)/3) < 4);
+
+ if(ok)
+ {
+ Swizzle *swizzle = new Swizzle;
+ swizzle->source = memacc.source;
+ swizzle->line = memacc.line;
+ swizzle->oper = memacc.oper;
+ swizzle->left = memacc.left;
+ swizzle->component_group = memacc.member;
+ swizzle->count = memacc.member.size();
+ copy(components, components+memacc.member.size(), swizzle->components);
+ r_replacement_expr = swizzle;
+ }
+ }
+ }
+
+ r_any_resolved |= (declaration!=memacc.declaration);
+ memacc.declaration = declaration;
+}
+
+void VariableResolver::visit(Swizzle &swizzle)
+{
+ TraversingVisitor::visit(swizzle);
+
+ if(record_target)
+ {
+ unsigned mask = 0;
+ for(unsigned i=0; i<swizzle.count; ++i)
+ mask |= 1<<swizzle.components[i];
+ add_to_chain(Assignment::Target::SWIZZLE, mask);
+ }
+}
+
+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(binary.right);
+ }
+ visit(binary.left);
+
+ if(record_target)
+ {
+ unsigned index = 0x3F;
+ if(Literal *literal_subscript = dynamic_cast<Literal *>(binary.right.get()))
+ if(literal_subscript->value.check_type<int>())
+ index = literal_subscript->value.value<int>();
+ add_to_chain(Assignment::Target::ARRAY, index);
+ }
+ }
+ else
+ TraversingVisitor::visit(binary);
+}
+
+void VariableResolver::visit(Assignment &assign)
+{
+ {
+ SetFlag set(record_target);
+ r_assignment_target = Assignment::Target();
+ visit(assign.left);
+ r_any_resolved |= (r_assignment_target<assign.target || assign.target<r_assignment_target);
+ assign.target = r_assignment_target;
+ }
+
+ r_self_referencing = false;
+ visit(assign.right);
+ assign.self_referencing = (r_self_referencing || assign.oper->token[0]!='=');
+}
+
+void VariableResolver::merge_layouts(Layout &to_layout, const Layout &from_layout)
+{
+ for(vector<Layout::Qualifier>::const_iterator i=from_layout.qualifiers.begin(); i!=from_layout.qualifiers.end(); ++i)
+ {
+ bool found = false;
+ for(vector<Layout::Qualifier>::iterator j=to_layout.qualifiers.begin(); (!found && j!=to_layout.qualifiers.end()); ++j)
+ if(j->name==i->name)
+ {
+ j->has_value = i->value;
+ j->value = i->value;
+ found = true;
+ }
+
+ if(!found)
+ to_layout.qualifiers.push_back(*i);
+ }
+}
+
+void VariableResolver::visit(VariableDeclaration &var)
+{
+ TraversingVisitor::visit(var);
+ VariableDeclaration *&ptr = current_block->variables[var.name];
+ if(!ptr)
+ ptr = &var;
+ else if(!current_block->parent && ptr->interface==var.interface && ptr->type==var.type)
+ {
+ if(ptr->source==BUILTIN_SOURCE)
+ redeclared_builtins.push_back(&var);
+ else
+ stage->diagnostics.push_back(Diagnostic(Diagnostic::WARN, var.source, var.line,
+ format("Redeclaring non-builtin variable '%s' is deprecated", var.name)));
+
+ if(var.init_expression)
+ ptr->init_expression = var.init_expression;
+ if(var.layout)
+ {
+ if(ptr->layout)
+ merge_layouts(*ptr->layout, *var.layout);
+ else
+ ptr->layout = var.layout;
+ }
+ nodes_to_remove.insert(&var);
+
+ r_any_resolved = true;
+ }
+}
+
+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.block_name, &iface));
+ if(!iface.instance_name.empty())
+ stage->interface_blocks.insert(make_pair("_"+iface.instance_name, &iface));
+
+ 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_nocopy(expr);
+ call->type = &type;
+ expr = call;
+}
+
+bool ExpressionResolver::convert_to_element(RefPtr<Expression> &expr, BasicTypeDeclaration &elem_type)
+{
+ if(BasicTypeDeclaration *expr_basic = dynamic_cast<BasicTypeDeclaration *>(expr->type))
+ {
+ BasicTypeDeclaration *to_type = &elem_type;
+ if(is_vector_or_matrix(*expr_basic))
+ to_type = find_type(elem_type, expr_basic->kind, expr_basic->size);
+ if(to_type)
+ {
+ convert_to(expr, *to_type);
+ return true;
+ }
+ }
+
+ return false;
+}
+
+bool ExpressionResolver::truncate_vector(RefPtr<Expression> &expr, unsigned size)
+{
+ if(BasicTypeDeclaration *expr_basic = dynamic_cast<BasicTypeDeclaration *>(expr->type))
+ if(BasicTypeDeclaration *expr_elem = get_element_type(*expr_basic))
+ {
+ RefPtr<Swizzle> swizzle = new Swizzle;
+ swizzle->left = expr;
+ swizzle->oper = &Operator::get_operator(".", Operator::POSTFIX);
+ swizzle->component_group = string("xyzw", size);
+ swizzle->count = size;
+ for(unsigned i=0; i<size; ++i)
+ swizzle->components[i] = i;
+ if(size==1)
+ swizzle->type = expr_elem;
+ else
+ swizzle->type = find_type(*expr_elem, BasicTypeDeclaration::VECTOR, size);
+ expr = swizzle;
+
+ 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(Block &block)
+{
+ SetForScope<Block *> set_block(current_block, &block);
+ for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); ++i)
+ {
+ insert_point = i;
+ (*i)->visit(*this);
+ }
+}
+
+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(VariableReference &var)
+{
+ if(var.declaration)
+ resolve(var, var.declaration->type_declaration, true);
+}
+
+void ExpressionResolver::visit(InterfaceBlockReference &iface)
+{
+ if(iface.declaration)
+ resolve(iface, iface.declaration->type_declaration, true);
+}
+
+void ExpressionResolver::visit(MemberAccess &memacc)
+{
+ TraversingVisitor::visit(memacc);
+
+ if(memacc.declaration)
+ resolve(memacc, memacc.declaration->type_declaration, memacc.left->lvalue);
+}
+
+void ExpressionResolver::visit(Swizzle &swizzle)
+{
+ TraversingVisitor::visit(swizzle);
+
+ if(BasicTypeDeclaration *left_basic = dynamic_cast<BasicTypeDeclaration *>(swizzle.left->type))
+ {
+ BasicTypeDeclaration *left_elem = get_element_type(*left_basic);
+ if(swizzle.count==1)
+ resolve(swizzle, left_elem, swizzle.left->lvalue);
+ else if(left_basic->kind==BasicTypeDeclaration::VECTOR && left_elem)
+ resolve(swizzle, find_type(*left_elem, left_basic->kind, swizzle.count), swizzle.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=='/')
+ {
+ // Arithmetic operators require scalar elements.
+ if(!is_scalar(*elem_left) || !is_scalar(*elem_right))
+ return;
+
+ if(oper=='*' && is_vector_or_matrix(*basic_left) && is_vector_or_matrix(*basic_right) &&
+ (basic_left->kind==BasicTypeDeclaration::MATRIX || basic_right->kind==BasicTypeDeclaration::MATRIX))
+ {
+ /* Multiplication has special rules when at least one operand is a
+ matrix and the other is a vector or a matrix. */
+ unsigned left_columns = basic_left->size&0xFFFF;
+ unsigned right_rows = basic_right->size;
+ if(basic_right->kind==BasicTypeDeclaration::MATRIX)
+ right_rows >>= 16;
+ if(left_columns!=right_rows)
+ return;
+
+ BasicTypeDeclaration *elem_result = (elem_compat==LEFT_CONVERTIBLE ? elem_right : elem_left);
+
+ if(basic_left->kind==BasicTypeDeclaration::VECTOR)
+ type = find_type(*elem_result, BasicTypeDeclaration::VECTOR, basic_right->size&0xFFFF);
+ else if(basic_right->kind==BasicTypeDeclaration::VECTOR)
+ type = find_type(*elem_result, BasicTypeDeclaration::VECTOR, basic_left->size>>16);
+ else
+ type = find_type(*elem_result, BasicTypeDeclaration::MATRIX, (basic_left->size&0xFFFF0000)|(basic_right->size&0xFFFF));
+ }
+ else if(compat==NOT_COMPATIBLE)
+ {
+ // Arithmetic between scalars and matrices or vectors is supported.
+ if(is_scalar(*basic_left) && is_vector_or_matrix(*basic_right))
+ type = (elem_compat==RIGHT_CONVERTIBLE ? find_type(*elem_left, basic_right->kind, basic_right->size) : basic_right);
+ else if(is_vector_or_matrix(*basic_left) && is_scalar(*basic_right))
+ type = (elem_compat==LEFT_CONVERTIBLE ? find_type(*elem_right, basic_left->kind, basic_left->size) : basic_left);
+ else
+ return;
+ }
+ else if(compat==LEFT_CONVERTIBLE)
+ type = basic_right;
+ else
+ type = basic_left;
+ }
+ else
+ return;
+
+ if(assign && type!=basic_left)
+ return;
+
+ bool converted = true;
+ if(compat==LEFT_CONVERTIBLE)
+ convert_to(binary.left, *basic_right);
+ else if(compat==RIGHT_CONVERTIBLE)
+ convert_to(binary.right, *basic_left);
+ else if(elem_compat==LEFT_CONVERTIBLE)
+ converted = convert_to_element(binary.left, *elem_right);
+ else if(elem_compat==RIGHT_CONVERTIBLE)
+ converted = convert_to_element(binary.right, *elem_left);
+
+ if(!converted)
+ type = 0;
+
+ resolve(binary, type, assign);
+}
+
+void ExpressionResolver::visit(BinaryExpression &binary)
+{
+ TraversingVisitor::visit(binary);
+ visit(binary, false);
+}
+
+void ExpressionResolver::visit(Assignment &assign)
+{
+ TraversingVisitor::visit(assign);
+
+ if(assign.oper->token[0]!='=')
+ return visit(assign, true);
+ else if(assign.left->type!=assign.right->type)
+ {
+ BasicTypeDeclaration *basic_left = dynamic_cast<BasicTypeDeclaration *>(assign.left->type);
+ BasicTypeDeclaration *basic_right = dynamic_cast<BasicTypeDeclaration *>(assign.right->type);
+ if(!basic_left || !basic_right)
+ return;
+
+ Compatibility compat = get_compatibility(*basic_left, *basic_right);
+ if(compat==RIGHT_CONVERTIBLE)
+ convert_to(assign.right, *basic_left);
+ else if(compat!=SAME_TYPE)
+ return;
+ }
+
+ resolve(assign, assign.left->type, true);
+}
+
+void ExpressionResolver::visit(TernaryExpression &ternary)
+{
+ TraversingVisitor::visit(ternary);
+
+ BasicTypeDeclaration *basic_cond = dynamic_cast<BasicTypeDeclaration *>(ternary.condition->type);
+ if(!basic_cond || basic_cond->kind!=BasicTypeDeclaration::BOOL)
+ return;
+
+ TypeDeclaration *type = 0;
+ if(ternary.true_expr->type==ternary.false_expr->type)
+ type = ternary.true_expr->type;
+ else
+ {
+ BasicTypeDeclaration *basic_true = dynamic_cast<BasicTypeDeclaration *>(ternary.true_expr->type);
+ BasicTypeDeclaration *basic_false = dynamic_cast<BasicTypeDeclaration *>(ternary.false_expr->type);
+ if(!basic_true || !basic_false)
+ return;
+
+ Compatibility compat = get_compatibility(*basic_true, *basic_false);
+ if(compat==NOT_COMPATIBLE)
+ return;
+
+ type = (compat==LEFT_CONVERTIBLE ? basic_true : basic_false);
+
+ if(compat==LEFT_CONVERTIBLE)
+ convert_to(ternary.true_expr, *basic_false);
+ else if(compat==RIGHT_CONVERTIBLE)
+ convert_to(ternary.false_expr, *basic_true);
+ }
+
+ resolve(ternary, type, false);
+}
+
+void ExpressionResolver::visit_constructor(FunctionCall &call)
+{
+ if(call.arguments.empty())
+ return;
+
+ map<string, TypeDeclaration *>::const_iterator i = stage->types.find(call.name);
+ if(i==stage->types.end())
+ return;
+ else if(BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(i->second))
+ {
+ BasicTypeDeclaration *elem = get_element_type(*basic);
+ if(!elem)
+ return;
+
+ vector<ArgumentInfo> args;
+ args.reserve(call.arguments.size());
+ unsigned arg_component_total = 0;
+ bool has_matrices = false;
+ for(NodeArray<Expression>::const_iterator j=call.arguments.begin(); j!=call.arguments.end(); ++j)
+ {
+ ArgumentInfo info;
+ if(!(info.type=dynamic_cast<BasicTypeDeclaration *>((*j)->type)))
+ return;
+ if(is_scalar(*info.type) || info.type->kind==BasicTypeDeclaration::BOOL)
+ info.component_count = 1;
+ else if(info.type->kind==BasicTypeDeclaration::VECTOR)
+ info.component_count = info.type->size;
+ else if(info.type->kind==BasicTypeDeclaration::MATRIX)
+ {
+ info.component_count = (info.type->size>>16)*(info.type->size&0xFFFF);
+ has_matrices = true;
+ }
+ else
+ return;
+ arg_component_total += info.component_count;
+ args.push_back(info);
+ }
+
+ bool convert_args = false;
+ if((is_scalar(*basic) || basic->kind==BasicTypeDeclaration::BOOL) && call.arguments.size()==1 && !has_matrices)
+ {
+ if(arg_component_total>1)
+ truncate_vector(call.arguments.front(), 1);
+
+ /* Single-element type constructors never need to convert their
+ arguments because the constructor *is* the conversion. */
+ }
+ else if(basic->kind==BasicTypeDeclaration::VECTOR && !has_matrices)
+ {
+ /* Vector constructors need either a single scalar argument or
+ enough components to fill out the vector. */
+ if(arg_component_total!=1 && arg_component_total<basic->size)
+ return;
+
+ /* A vector of same size can be converted directly. For other
+ combinations the individual arguments need to be converted. */
+ if(call.arguments.size()==1)
+ {
+ if(arg_component_total==1)
+ convert_args = true;
+ else if(arg_component_total>basic->size)
+ truncate_vector(call.arguments.front(), basic->size);
+ }
+ else if(arg_component_total==basic->size)
+ convert_args = true;
+ else
+ return;
+ }
+ else if(basic->kind==BasicTypeDeclaration::MATRIX)
+ {
+ unsigned column_count = basic->size&0xFFFF;
+ unsigned row_count = basic->size>>16;
+ if(call.arguments.size()==1)
+ {
+ /* A matrix can be constructed from a single element or another
+ matrix of sufficient size. */
+ if(arg_component_total==1)
+ convert_args = true;
+ else if(args.front().type->kind==BasicTypeDeclaration::MATRIX)
+ {
+ unsigned arg_columns = args.front().type->size&0xFFFF;
+ unsigned arg_rows = args.front().type->size>>16;
+ if(arg_columns<column_count || arg_rows<row_count)
+ return;
+
+ /* Always generate a temporary here and let the optimization
+ stage inline it if that's reasonable. */
+ RefPtr<VariableDeclaration> temporary = new VariableDeclaration;
+ temporary->type = args.front().type->name;
+ temporary->name = get_unused_variable_name(*current_block, "_temp");
+ temporary->init_expression = call.arguments.front();
+ current_block->body.insert(insert_point, temporary);
+
+ // Create expressions to build each column.
+ vector<RefPtr<Expression> > columns;
+ columns.reserve(column_count);
+ for(unsigned j=0; j<column_count; ++j)
+ {
+ RefPtr<VariableReference> ref = new VariableReference;
+ ref->name = temporary->name;
+
+ RefPtr<Literal> index = new Literal;
+ index->token = lexical_cast<string>(j);
+ index->value = static_cast<int>(j);
+
+ RefPtr<BinaryExpression> subscript = new BinaryExpression;
+ subscript->left = ref;
+ subscript->oper = &Operator::get_operator("[", Operator::BINARY);
+ subscript->right = index;
+ subscript->type = args.front().type->base_type;
+
+ columns.push_back(subscript);
+ if(arg_rows>row_count)
+ truncate_vector(columns.back(), row_count);
+ }
+
+ call.arguments.resize(column_count);
+ copy(columns.begin(), columns.end(), call.arguments.begin());
+
+ /* Let VariableResolver process the new nodes and finish
+ resolving the constructor on the next pass. */
+ r_any_resolved = true;
+ return;
+ }
+ else
+ return;
+ }
+ else if(arg_component_total==column_count*row_count && !has_matrices)
+ {
+ /* Construct a matrix from individual components in column-major
+ order. Arguments must align at column boundaries. */
+ vector<RefPtr<Expression> > columns;
+ columns.reserve(column_count);
+
+ vector<RefPtr<Expression> > column_args;
+ column_args.reserve(row_count);
+ unsigned column_component_count = 0;
+
+ for(unsigned j=0; j<call.arguments.size(); ++j)
+ {
+ const ArgumentInfo &info = args[j];
+ if(!column_component_count && info.type->kind==BasicTypeDeclaration::VECTOR && info.component_count==row_count)
+ // A vector filling the entire column can be used as is.
+ columns.push_back(call.arguments[j]);
+ else
+ {
+ column_args.push_back(call.arguments[j]);
+ column_component_count += info.component_count;
+ if(column_component_count==row_count)
+ {
+ /* The column has filled up. Create a vector constructor
+ for it.*/
+ RefPtr<FunctionCall> column_call = new FunctionCall;
+ column_call->name = basic->base_type->name;
+ column_call->constructor = true;
+ column_call->arguments.resize(column_args.size());
+ copy(column_args.begin(), column_args.end(), column_call->arguments.begin());
+ column_call->type = basic->base_type;
+ visit_constructor(*column_call);
+ columns.push_back(column_call);
+
+ column_args.clear();
+ column_component_count = 0;
+ }
+ else if(column_component_count>row_count)
+ // Argument alignment mismatch.
+ return;
+ }
+ }
+ }
+ else
+ return;
+ }
+ else
+ return;
+
+ if(convert_args)
+ {
+ // The argument list may have changed so can't rely on args.
+ for(NodeArray<Expression>::iterator j=call.arguments.begin(); j!=call.arguments.end(); ++j)
+ if(BasicTypeDeclaration *basic_arg = dynamic_cast<BasicTypeDeclaration *>((*j)->type))
+ {
+ BasicTypeDeclaration *elem_arg = get_element_type(*basic_arg);
+ if(elem_arg!=elem)
+ convert_to_element(*j, *elem);
+ }
+ }
+ }
+ else if(StructDeclaration *strct = dynamic_cast<StructDeclaration *>(i->second))
+ {
+ if(call.arguments.size()!=strct->members.body.size())
+ return;
+
+ unsigned k = 0;
+ for(NodeList<Statement>::const_iterator j=strct->members.body.begin(); j!=strct->members.body.end(); ++j, ++k)
+ {
+ if(VariableDeclaration *var = dynamic_cast<VariableDeclaration *>(j->get()))
+ {
+ if(!call.arguments[k]->type || call.arguments[k]->type!=var->type_declaration)
+ return;
+ }
+ else
+ return;
+ }
+ }
+
+ resolve(call, i->second, false);
+}
+
+void ExpressionResolver::visit(FunctionCall &call)
+{
+ TraversingVisitor::visit(call);
+
+ if(call.declaration)
+ resolve(call, call.declaration->return_type_declaration, false);
+ else if(call.constructor)
+ visit_constructor(call);
+}
+
+void ExpressionResolver::visit(BasicTypeDeclaration &type)
+{
+ basic_types.push_back(&type);
+}
+
+void ExpressionResolver::visit(VariableDeclaration &var)
+{
+ TraversingVisitor::visit(var);
+ if(!var.init_expression)
+ return;
+
+ BasicTypeDeclaration *var_basic = dynamic_cast<BasicTypeDeclaration *>(var.type_declaration);
+ BasicTypeDeclaration *init_basic = dynamic_cast<BasicTypeDeclaration *>(var.init_expression->type);
+ if(!var_basic || !init_basic)
+ return;
+
+ Compatibility compat = get_compatibility(*var_basic, *init_basic);
+ if(compat==RIGHT_CONVERTIBLE)
+ convert_to(var.init_expression, *var_basic);
+}
+
+
+bool FunctionResolver::apply(Stage &s)
+{
+ stage = &s;
+ s.functions.clear();
+ r_any_resolved = false;
+ s.content.visit(*this);
+ return r_any_resolved;
+}
+
+void FunctionResolver::visit(FunctionCall &call)
+{
+ FunctionDeclaration *declaration = 0;
+ if(stage->types.count(call.name))
+ call.constructor = true;
+ else
+ {
+ string arg_types;
+ bool has_signature = true;
+ for(NodeArray<Expression>::const_iterator i=call.arguments.begin(); (has_signature && i!=call.arguments.end()); ++i)
+ {
+ if((*i)->type)
+ append(arg_types, ",", (*i)->type->name);
+ else
+ has_signature = false;
+ }
+
+ if(has_signature)
+ {
+ map<string, FunctionDeclaration *>::iterator i = stage->functions.find(format("%s(%s)", call.name, arg_types));
+ declaration = (i!=stage->functions.end() ? i->second : 0);
+ }
+ }
+
+ r_any_resolved |= (declaration!=call.declaration);
+ call.declaration = declaration;
+
+ TraversingVisitor::visit(call);
+}
+
+void FunctionResolver::visit(FunctionDeclaration &func)
+{
+ if(func.signature.empty())
+ {
+ string param_types;
+ for(NodeArray<VariableDeclaration>::const_iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
+ {
+ if((*i)->type_declaration)
+ append(param_types, ",", (*i)->type_declaration->name);
+ else
+ return;
+ }
+ func.signature = format("(%s)", param_types);
+ r_any_resolved = true;
+ }
+
+ string key = func.name+func.signature;
+ FunctionDeclaration *&stage_decl = stage->functions[key];
+ vector<FunctionDeclaration *> &decls = declarations[key];
+ if(func.definition==&func)
+ {
+ if(stage_decl && stage_decl->definition)
+ {
+ if(!func.overrd)
+ stage->diagnostics.push_back(Diagnostic(Diagnostic::WARN, func.source, func.line,
+ format("Overriding function '%s' without the override keyword is deprecated", key)));
+ if(!stage_decl->definition->virtua)
+ stage->diagnostics.push_back(Diagnostic(Diagnostic::WARN, func.source, func.line,
+ format("Overriding function '%s' not declared as virtual is deprecated", key)));
+ }
+ stage_decl = &func;
+
+ // Set all previous declarations to use this definition.
+ for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
+ {
+ r_any_resolved |= (func.definition!=(*i)->definition);
+ (*i)->definition = func.definition;
+ (*i)->body.body.clear();
+ }
+ }
+ else
+ {
+ FunctionDeclaration *definition = (stage_decl ? stage_decl->definition : 0);
+ r_any_resolved |= (definition!=func.definition);
+ func.definition = definition;
+
+ if(!stage_decl)
+ stage_decl = &func;
+ }
+ decls.push_back(&func);
+
+ TraversingVisitor::visit(func);
+}
+
+} // namespace SL
+} // namespace GL
+} // namespace Msp
projects / libs / gl.git / commitdiff