fix(codegen): omit unused object allocator storage

phpunit/src/NewObjectCodegenTest.php

@@ -70,6 +70,20 @@ final class NewObjectCodegenTest extends \BaseTest
         );
     }
 
+    public function testCreateObjectFunctionStorageIsOnlyDeclaredForClassesThatUseIt(): void
+    {
+        [, $extension] = $this->compileFixtureAndExtension();
+
+        self::assertStringNotContainsString(
+            'static zend_object* (*create_object_KnownNewObjectCodegen)',
+            $extension,
+        );
+        self::assertStringContainsString(
+            'static zend_object* (*create_object_RuntimeArrayDefaultCodegen)',
+            $extension,
+        );
+    }
+
     public function testRuntimeArrayDefaultsUseLazyRequestTemplates(): void
     {
         [, $extension] = $this->compileFixtureAndExtension();

src/Translator.php

@@ -1200,7 +1200,10 @@ CODE;
                 && !$classDef->trait
                 && !$classDef->enum
             ) {
-                $code .= 'static zend_object* (*create_object_' . $classDef->getNamespacedName() . ")(zend_class_entry *class_type);\n";
+                if ($classDef->requireCtor) {
+                    $code .= 'static zend_object* (*create_object_' . $classDef->getNamespacedName()
+                        . ")(zend_class_entry *class_type);\n";
+                }
                 $code .= 'static zend_object_handlers property_handlers_' . $classDef->getNamespacedName() . ";\n";
             }
             foreach ($classDef->constants as $constant) {