Immutable clases and op_arrays.

Squashed commit of the following:

commit cd0c36c3f943849e5b97a8dbe2dd029fbeab3df9
Merge: 4740dabb84 ad6738e886
Author: Dmitry Stogov <dmitry@zend.com>
Date:   Wed Oct 17 14:43:38 2018 +0300

    Merge branch 'master' into immutable

    * master:
      Remove the "auto" encoding
      Fixed bug #77025
      Add vtbls for EUC-TW encoding

commit 4740dabb843c6d4f7f866b4a2456073c9eaf4c77
Author: Dmitry Stogov <dmitry@zend.com>
Date:   Wed Oct 17 14:12:28 2018 +0300

    Reverted back ce->iterator_funcs_ptr. Initialize ce->iterator_funcs_ptr fields in immutable classes.

commit ad7a78b253be970db70c2251e66f9297d8e7f829
Author: Dmitry Stogov <dmitry@zend.com>
Date:   Wed Oct 17 11:46:30 2018 +0300

    Added comment

commit 0276ea51875bab37be01a4dc5e5a047c5698c571
Author: Dmitry Stogov <dmitry@zend.com>
Date:   Wed Oct 17 11:42:43 2018 +0300

    Added type cast

commit c63fc5d5f19c58498108d1698055b2b442227eb3
Author: Dmitry Stogov <dmitry@zend.com>
Date:   Wed Oct 17 11:36:51 2018 +0300

    Moved static class members initialization into the proper place.

commit b945548e9306b1826c881918858b5e5aa3eb3002
Author: Dmitry Stogov <dmitry@zend.com>
Date:   Wed Oct 17 11:21:03 2018 +0300

    Removed redundand assertion

commit d5a41088401814c829847db212488f8aae39bcd2
Author: Dmitry Stogov <dmitry@zend.com>
Date:   Wed Oct 17 11:19:13 2018 +0300

    Removed duplicate code

commit 8dadca8864e66de70a24bdf1181bcf7dd8fb27d7
Author: Dmitry Stogov <dmitry@zend.com>
Date:   Wed Oct 17 11:05:43 2018 +0300

    Hide offset encoding magic in ZEND_MAP_PTR_IS_OFFSET(), ZEND_MAP_PTR_OFFSET2PTR() and ZEND_MAP_PTR_PTR2OFFSET() macros.

commit 9ef07c88bd76801e2d4fbfeab3ebfd6e6a67ac5f
Author: Dmitry Stogov <dmitry@zend.com>
Date:   Wed Oct 17 10:48:29 2018 +0300

    typo

commit a06f0f3d3aba53e766046221ee44fb9720389ecc
Merge: 94099586ec 3412345ffe
Author: Dmitry Stogov <dmitry@zend.com>
Date:   Wed Oct 17 10:47:07 2018 +0300

    Merge branch 'master' into immutable

    * master:
      Remove unused variable makefile_am_files
      Classify object handlers are required/optional
      Add support for getting SKIP_TAGSTART and SKIP_WHITE options
      Remove some obsolete config_vars.mk occurrences
      Remove bsd_converted from .gitignore
      Remove configuration parser and scanners ignores
      Remove obsolete buildconf.stamp from .gitignore
      [ci skip] Add magicdata.patch exception to .gitignore
      Remove outdated ext/spl/examples items from .gitignore
      Remove unused test.inc in ext/iconv/tests

commit 94099586ec599117581ca01c15b1f6c5f749e23a
Author: Dmitry Stogov <dmitry@zend.com>
Date:   Mon Oct 15 23:34:01 2018 +0300

    Immutable clases and op_arrays

1 files changed, 10 insertions, 8 deletions

diff --git a/ext/reflection/php_reflection.c b/ext/reflection/php_reflection.c
index 59ff6526a7..382e565cd8 100644
--- a/ext/reflection/php_reflection.c
+++ b/ext/reflection/php_reflection.c
@@ -685,7 +685,7 @@ static void _function_closure_string(smart_str *str, zend_function *fptr, char*
 		return;
 	}
 
-	static_variables = fptr->op_array.static_variables;
+	static_variables = ZEND_MAP_PTR_GET(fptr->op_array.static_variables_ptr);
 	count = zend_hash_num_elements(static_variables);
 
 	if (!count) {
@@ -1790,19 +1790,21 @@ ZEND_METHOD(reflection_function, getStaticVariables)
 
 	/* Return an empty array in case no static variables exist */
 	if (fptr->type == ZEND_USER_FUNCTION && fptr->op_array.static_variables != NULL) {
+		HashTable *ht;
+
 		array_init(return_value);
-		if (GC_REFCOUNT(fptr->op_array.static_variables) > 1) {
-			if (!(GC_FLAGS(fptr->op_array.static_variables) & IS_ARRAY_IMMUTABLE)) {
-				GC_DELREF(fptr->op_array.static_variables);
-			}
-			fptr->op_array.static_variables = zend_array_dup(fptr->op_array.static_variables);
+		ht = ZEND_MAP_PTR_GET(fptr->op_array.static_variables_ptr);
+		if (!ht) {
+			ZEND_ASSERT(fptr->op_array.fn_flags & ZEND_ACC_IMMUTABLE);
+			ht = zend_array_dup(fptr->op_array.static_variables);
+			ZEND_MAP_PTR_SET(fptr->op_array.static_variables_ptr, ht);
 		}
-		ZEND_HASH_FOREACH_VAL(fptr->op_array.static_variables, val) {
+		ZEND_HASH_FOREACH_VAL(ht, val) {
 			if (UNEXPECTED(zval_update_constant_ex(val, fptr->common.scope) != SUCCESS)) {
 				return;
 			}
 		} ZEND_HASH_FOREACH_END();
-		zend_hash_copy(Z_ARRVAL_P(return_value), fptr->op_array.static_variables, zval_add_ref);
+		zend_hash_copy(Z_ARRVAL_P(return_value), ht, zval_add_ref);
 	} else {
 		ZVAL_EMPTY_ARRAY(return_value);
 	}