{
inject_block(stage.content, module->shared.content);
+ apply<FunctionResolver>(stage);
apply<VariableResolver>(stage);
apply<InterfaceGenerator>(stage);
apply<VariableResolver>(stage);
bool ProgramCompiler::optimize(Stage &stage)
{
+ apply<ConstantConditionEliminator>(stage);
+ apply<VariableResolver>(stage);
+
set<Node *> unused = apply<UnusedVariableLocator>(stage);
+ set<Node *> unused2 = apply<UnusedFunctionLocator>(stage);
+ unused.insert(unused2.begin(), unused2.end());
apply<NodeRemover>(stage, unused);
return !unused.empty();
}
-ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
- scope_level(0),
+void ProgramCompiler::FunctionResolver::visit(FunctionCall &call)
+{
+ map<string, vector<FunctionDeclaration *> >::iterator i = functions.find(call.name);
+ if(i!=functions.end())
+ call.declaration = i->second.back();
+
+ TraversingVisitor::visit(call);
+}
+
+void ProgramCompiler::FunctionResolver::visit(FunctionDeclaration &func)
+{
+ vector<FunctionDeclaration *> &decls = functions[func.name];
+ if(func.definition)
+ {
+ for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
+ (*i)->definition = func.definition;
+ decls.clear();
+ decls.push_back(&func);
+ }
+ else if(!decls.empty() && decls.back()->definition)
+ func.definition = decls.back()->definition;
+ else
+ decls.push_back(&func);
+
+ TraversingVisitor::visit(func);
+}
+
+
+ProgramCompiler::BlockModifier::BlockModifier():
remove_node(false)
{ }
+void ProgramCompiler::BlockModifier::flatten_block(Block &block)
+{
+ for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
+ insert_nodes.push_back((*i)->clone());
+ remove_node = true;
+}
+
+void ProgramCompiler::BlockModifier::apply_and_increment(Block &block, list<NodePtr<Node> >::iterator &i)
+{
+ for(list<Node *>::iterator j=insert_nodes.begin(); j!=insert_nodes.end(); ++j)
+ block.body.insert(i, *j);
+ insert_nodes.clear();
+
+ if(remove_node)
+ block.body.erase(i++);
+ else
+ ++i;
+ remove_node = false;
+}
+
+void ProgramCompiler::BlockModifier::visit(Block &block)
+{
+ for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
+ {
+ (*i)->visit(*this);
+ apply_and_increment(block, i);
+ }
+}
+
+
+ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
+ scope_level(0)
+{ }
+
string ProgramCompiler::InterfaceGenerator::get_out_prefix(StageType type)
{
if(type==VERTEX)
iface_declarations.clear();
}
- for(list<Node *>::iterator j=insert_nodes.begin(); j!=insert_nodes.end(); ++j)
- block.body.insert(i, *j);
- insert_nodes.clear();
-
- if(remove_node)
- block.body.erase(i++);
- else
- ++i;
- remove_node = false;
+ apply_and_increment(block, i);
}
}
}
+ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator():
+ variable_values(0),
+ result(0.0f),
+ result_valid(false)
+{ }
+
+ProgramCompiler::ExpressionEvaluator::ExpressionEvaluator(const ValueMap &v):
+ variable_values(&v),
+ result(0.0f),
+ result_valid(false)
+{ }
+
+void ProgramCompiler::ExpressionEvaluator::visit(Literal &literal)
+{
+ if(literal.token=="true")
+ result = 1.0f;
+ else if(literal.token=="false")
+ result = 0.0f;
+ else
+ result = lexical_cast<float>(literal.token);
+ result_valid = true;
+}
+
+void ProgramCompiler::ExpressionEvaluator::visit(VariableReference &var)
+{
+ if(!var.declaration)
+ return;
+
+ if(variable_values)
+ {
+ ValueMap::const_iterator i = variable_values->find(var.declaration);
+ if(i!=variable_values->end())
+ i->second->visit(*this);
+ }
+ else if(var.declaration->init_expression)
+ var.declaration->init_expression->visit(*this);
+}
+
+void ProgramCompiler::ExpressionEvaluator::visit(UnaryExpression &unary)
+{
+ result_valid = false;
+ unary.expression->visit(*this);
+ if(!result_valid)
+ return;
+
+ if(unary.oper=="!")
+ result = !result;
+ else
+ result_valid = false;
+}
+
+void ProgramCompiler::ExpressionEvaluator::visit(BinaryExpression &binary)
+{
+ result_valid = false;
+ binary.left->visit(*this);
+ if(!result_valid)
+ return;
+
+ float left_result = result;
+ result_valid = false;
+ binary.right->visit(*this);
+ if(!result_valid)
+ return;
+
+ if(binary.oper=="<")
+ result = (left_result<result);
+ else if(binary.oper=="<=")
+ result = (left_result<=result);
+ else if(binary.oper==">")
+ result = (left_result>result);
+ else if(binary.oper==">=")
+ result = (left_result>=result);
+ else if(binary.oper=="==")
+ result = (left_result==result);
+ else if(binary.oper=="!=")
+ result = (left_result!=result);
+ else if(binary.oper=="&&")
+ result = (left_result && result);
+ else if(binary.oper=="||")
+ result = (left_result || result);
+ else
+ result_valid = false;
+}
+
+
+ProgramCompiler::ConstantConditionEliminator::ConstantConditionEliminator():
+ scope_level(0)
+{ }
+
+void ProgramCompiler::ConstantConditionEliminator::visit(Block &block)
+{
+ SetForScope<unsigned> set(scope_level, scope_level+1);
+ BlockModifier::visit(block);
+
+ for(map<string, VariableDeclaration *>::const_iterator i=block.variables.begin(); i!=block.variables.end(); ++i)
+ variable_values.erase(i->second);
+}
+
+void ProgramCompiler::ConstantConditionEliminator::visit(Assignment &assign)
+{
+ variable_values.erase(assign.target_declaration);
+}
+
+void ProgramCompiler::ConstantConditionEliminator::visit(VariableDeclaration &var)
+{
+ if(var.constant || scope_level>1)
+ variable_values[&var] = &*var.init_expression;
+}
+
+void ProgramCompiler::ConstantConditionEliminator::visit(Conditional &cond)
+{
+ ExpressionEvaluator eval(variable_values);
+ cond.condition->visit(eval);
+ if(eval.result_valid)
+ flatten_block(eval.result ? cond.body : cond.else_body);
+ else
+ TraversingVisitor::visit(cond);
+}
+
+void ProgramCompiler::ConstantConditionEliminator::visit(Iteration &iter)
+{
+ if(iter.condition)
+ {
+ ExpressionEvaluator eval;
+ iter.condition->visit(eval);
+ if(eval.result_valid && !eval.result)
+ {
+ remove_node = true;
+ return;
+ }
+ }
+
+ TraversingVisitor::visit(iter);
+}
+
+
ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
aggregate(0),
assignment(0),
}
+void ProgramCompiler::UnusedFunctionLocator::visit(FunctionCall &call)
+{
+ TraversingVisitor::visit(call);
+
+ unused_nodes.erase(call.declaration);
+ if(call.declaration && call.declaration->definition!=call.declaration)
+ used_definitions.insert(call.declaration->definition);
+}
+
+void ProgramCompiler::UnusedFunctionLocator::visit(FunctionDeclaration &func)
+{
+ TraversingVisitor::visit(func);
+
+ if(func.name!="main" && !used_definitions.count(&func))
+ unused_nodes.insert(&func);
+}
+
+
ProgramCompiler::NodeRemover::NodeRemover(const set<Node *> &r):
to_remove(r)
{ }
projects / libs / gl.git / blobdiff