public function performDeadCodeElimination()
{
// Build the connections between caller and receiver ("mark").
$registry = new OA_FunctionRegistry();
foreach ($this->functionObjects as $functionObject) {
$registry->registerNormalFunction($functionObject->getName(), $functionObject);
}
foreach ($this->classObjects as $classObject) {
$classObject->registerAllFunctions($registry);
}
OA_SymbolTableBuilder::_markAllCalls($registry, $this->functionCallObjects);
foreach ($this->classObjects as $classObject) {
$exportedCalls = $classObject->getAllExportedCalls();
OA_SymbolTableBuilder::_markAllCalls($registry, $exportedCalls);
}
// Now delete all dead receivers ("sweep").
foreach ($this->functionObjects as $functionObject) {
$functionObject->cleanIfDead();
}
foreach ($this->classObjects as $classObject) {
$classObject->cleanDeadFunctions();
}
}
