text: /*
     +----------------------------------------------------------------------+
     | Zend Engine                                                          |
     +----------------------------------------------------------------------+
     | Copyright (c) Zend Technologies Ltd. (http://www.zend.com)           |
     +----------------------------------------------------------------------+
     | This source file is subject to version 2.00 of the Zend license,     |
     | that is bundled with this package in the file LICENSE, and is        |
     | available through the world-wide-web at the following url:           |
     | http://www.zend.com/license/2_00.txt.                                |
     | If you did not receive a copy of the Zend license and are unable to  |
     | obtain it through the world-wide-web, please send a note to          |
     | license@zend.com so we can mail you a copy immediately.              |
     +----------------------------------------------------------------------+
     | Authors: Andi Gutmans <andi@php.net>                                 |
     |          Zeev Suraski <zeev@php.net>                                 |
     |          Nikita Popov <nikic@php.net>                                |
     +----------------------------------------------------------------------+
  */
  
  #include <zend_language_parser.h>
  #include "zend.h"
  #include "zend_compile.h"
  #include "zend_constants.h"
  #include "zend_llist.h"
  #include "zend_API.h"
  #include "zend_exceptions.h"
  #include "zend_interfaces.h"
  #include "zend_virtual_cwd.h"
  #include "zend_multibyte.h"
  #include "zend_language_scanner.h"
  #include "zend_inheritance.h"
  #include "zend_vm.h"
  
  #define SET_NODE(target, src) do { \
  		target ## _type = (src)->op_type; \
  		if ((src)->op_type == IS_CONST) { \
  			target.constant = zend_add_literal(&(src)->u.constant); \
  		} else { \
  			target = (src)->u.op; \
  		} \
  	} while (0)
  
  #define GET_NODE(target, src) do { \
  		(target)->op_type = src ## _type; \
  		if ((target)->op_type == IS_CONST) { \
  			ZVAL_COPY_VALUE(&(target)->u.constant, CT_CONSTANT(src)); \
  		} else { \
  			(target)->u.op = src; \
  		} \
  	} while (0)
  
  #define FC(member) (CG(file_context).member)
  
  typedef struct _zend_loop_var {
  	zend_uchar opcode;
  	zend_uchar var_type;
  	uint32_t   var_num;
  	uint32_t   try_catch_offset;
  } zend_loop_var;
  
  static inline uint32_t zend_alloc_cache_slots(unsigned count) {
  	zend_op_array *op_array = CG(active_op_array);
  	uint32_t ret = op_array->cache_size;
  	op_array->cache_size += count * sizeof(void*);
  	return ret;
  }
  
  static inline uint32_t zend_alloc_cache_slot(void) {
  	return zend_alloc_cache_slots(1);
  }
  
  ZEND_API zend_op_array *(*zend_compile_file)(zend_file_handle *file_handle, int type);
  ZEND_API zend_op_array *(*zend_compile_string)(zval *source_string, char *filename);
  
  #ifndef ZTS
  ZEND_API zend_compiler_globals compiler_globals;
  ZEND_API zend_executor_globals executor_globals;
  #endif
  
  static zend_op *zend_emit_op(znode *result, zend_uchar opcode, znode *op1, znode *op2);
  static zend_bool zend_try_ct_eval_array(zval *result, zend_ast *ast);
  
  static void init_op(zend_op *op)
  {
  	MAKE_NOP(op);
  	op->extended_value = 0;
  	op->lineno = CG(zend_lineno);
  }
  
  static zend_always_inline uint32_t get_next_op_number(void)
  {
  	return CG(active_op_array)->last;
  }
  
  static zend_op *get_next_op(void)
  {
  	zend_op_array *op_array = CG(active_op_array);
  	uint32_t next_op_num = op_array->last++;
  	zend_op *next_op;
  
  	if (UNEXPECTED(next_op_num >= CG(context).opcodes_size)) {
  		CG(context).opcodes_size *= 4;
  		op_array->opcodes = erealloc(op_array->opcodes, CG(context).opcodes_size * sizeof(zend_op));
  	}
  
  	next_op = &(op_array->opcodes[next_op_num]);
  
  	init_op(next_op);
  
  	return next_op;
  }
  
  static zend_brk_cont_element *get_next_brk_cont_element(void)
  {
  	CG(context).last_brk_cont++;
  	CG(context).brk_cont_array = erealloc(CG(context).brk_cont_array, sizeof(zend_brk_cont_element) * CG(context).last_brk_cont);
  	return &CG(context).brk_cont_array[CG(context).last_brk_cont-1];
  }
  
  static void zend_destroy_property_info_internal(zval *zv) /* {{{ */
  {
  	zend_property_info *property_info = Z_PTR_P(zv);
  
  	zend_string_release_ex(property_info->name, 1);
  	free(property_info);
  }
  /* }}} */
  
  static zend_string *zend_build_runtime_definition_key(zend_string *name, unsigned char *lex_pos) /* {{{ */
  {
  	zend_string *result;
  	char char_pos_buf[32];
  	size_t char_pos_len = sprintf(char_pos_buf, "%p", lex_pos);
  	zend_string *filename = CG(active_op_array)->filename;
  
  	/* NULL, name length, filename length, last accepting char position length */
  	result = zend_string_alloc(1 + ZSTR_LEN(name) + ZSTR_LEN(filename) + char_pos_len, 0);
   	sprintf(ZSTR_VAL(result), "%c%s%s%s", '\0', ZSTR_VAL(name), ZSTR_VAL(filename), char_pos_buf);
  	return zend_new_interned_string(result);
  }
  /* }}} */
  
  static zend_bool zend_get_unqualified_name(const zend_string *name, const char **result, size_t *result_len) /* {{{ */
  {
  	const char *ns_separator = zend_memrchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name));
  	if (ns_separator != NULL) {
  		*result = ns_separator + 1;
  		*result_len = ZSTR_VAL(name) + ZSTR_LEN(name) - *result;
  		return 1;
  	}
  
  	return 0;
  }
  /* }}} */
  
  struct reserved_class_name {
  	const char *name;
  	size_t len;
  };
  static const struct reserved_class_name reserved_class_names[] = {
  	{ZEND_STRL("bool")},
  	{ZEND_STRL("false")},
  	{ZEND_STRL("float")},
  	{ZEND_STRL("int")},
  	{ZEND_STRL("null")},
  	{ZEND_STRL("parent")},
  	{ZEND_STRL("self")},
  	{ZEND_STRL("static")},
  	{ZEND_STRL("string")},
  	{ZEND_STRL("true")},
  	{ZEND_STRL("void")},
  	{ZEND_STRL("iterable")},
  	{ZEND_STRL("object")},
  	{NULL, 0}
  };
  
  static zend_bool zend_is_reserved_class_name(const zend_string *name) /* {{{ */
  {
  	const struct reserved_class_name *reserved = reserved_class_names;
  
  	const char *uqname = ZSTR_VAL(name);
  	size_t uqname_len = ZSTR_LEN(name);
  	zend_get_unqualified_name(name, &uqname, &uqname_len);
  
  	for (; reserved->name; ++reserved) {
  		if (uqname_len == reserved->len
  			&& zend_binary_strcasecmp(uqname, uqname_len, reserved->name, reserved->len) == 0
  		) {
  			return 1;
  		}
  	}
  
  	return 0;
  }
  /* }}} */
  
  void zend_assert_valid_class_name(const zend_string *name) /* {{{ */
  {
  	if (zend_is_reserved_class_name(name)) {
  		zend_error_noreturn(E_COMPILE_ERROR,
  			"Cannot use '%s' as class name as it is reserved", ZSTR_VAL(name));
  	}
  }
  /* }}} */
  
  typedef struct _builtin_type_info {
  	const char* name;
  	const size_t name_len;
  	const zend_uchar type;
  } builtin_type_info;
  
  static const builtin_type_info builtin_types[] = {
  	{ZEND_STRL("int"), IS_LONG},
  	{ZEND_STRL("float"), IS_DOUBLE},
  	{ZEND_STRL("string"), IS_STRING},
  	{ZEND_STRL("bool"), _IS_BOOL},
  	{ZEND_STRL("void"), IS_VOID},
  	{ZEND_STRL("iterable"), IS_ITERABLE},
  	{ZEND_STRL("object"), IS_OBJECT},
  	{NULL, 0, IS_UNDEF}
  };
  
  
  static zend_always_inline zend_uchar zend_lookup_builtin_type_by_name(const zend_string *name) /* {{{ */
  {
  	const builtin_type_info *info = &builtin_types[0];
  
  	for (; info->name; ++info) {
  		if (ZSTR_LEN(name) == info->name_len
  			&& zend_binary_strcasecmp(ZSTR_VAL(name), ZSTR_LEN(name), info->name, info->name_len) == 0
  		) {
  			return info->type;
  		}
  	}
  
  	return 0;
  }
  /* }}} */
  
  
  void zend_oparray_context_begin(zend_oparray_context *prev_context) /* {{{ */
  {
  	*prev_context = CG(context);
  	CG(context).opcodes_size = INITIAL_OP_ARRAY_SIZE;
  	CG(context).vars_size = 0;
  	CG(context).literals_size = 0;
  	CG(context).fast_call_var = -1;
  	CG(context).try_catch_offset = -1;
  	CG(context).current_brk_cont = -1;
  	CG(context).last_brk_cont = 0;
  	CG(context).brk_cont_array = NULL;
  	CG(context).labels = NULL;
  }
  /* }}} */
  
  void zend_oparray_context_end(zend_oparray_context *prev_context) /* {{{ */
  {
  	if (CG(context).brk_cont_array) {
  		efree(CG(context).brk_cont_array);
  		CG(context).brk_cont_array = NULL;
  	}
  	if (CG(context).labels) {
  		zend_hash_destroy(CG(context).labels);
  		FREE_HASHTABLE(CG(context).labels);
  		CG(context).labels = NULL;
  	}
  	CG(context) = *prev_context;
  }
  /* }}} */
  
  static void zend_reset_import_tables(void) /* {{{ */
  {
  	if (FC(imports)) {
  		zend_hash_destroy(FC(imports));
  		efree(FC(imports));
  		FC(imports) = NULL;
  	}
  
  	if (FC(imports_function)) {
  		zend_hash_destroy(FC(imports_function));
  		efree(FC(imports_function));
  		FC(imports_function) = NULL;
  	}
  
  	if (FC(imports_const)) {
  		zend_hash_destroy(FC(imports_const));
  		efree(FC(imports_const));
  		FC(imports_const) = NULL;
  	}
  }
  /* }}} */
  
  static void zend_end_namespace(void) /* {{{ */ {
  	FC(in_namespace) = 0;
  	zend_reset_import_tables();
  	if (FC(current_namespace)) {
  		zend_string_release_ex(FC(current_namespace), 0);
  		FC(current_namespace) = NULL;
  	}
  }
  /* }}} */
  
  void zend_file_context_begin(zend_file_context *prev_context) /* {{{ */
  {
  	*prev_context = CG(file_context);
  	FC(imports) = NULL;
  	FC(imports_function) = NULL;
  	FC(imports_const) = NULL;
  	FC(current_namespace) = NULL;
  	FC(in_namespace) = 0;
  	FC(has_bracketed_namespaces) = 0;
  	FC(declarables).ticks = 0;
  	zend_hash_init(&FC(seen_symbols), 8, NULL, NULL, 0);
  }
  /* }}} */
  
  void zend_file_context_end(zend_file_context *prev_context) /* {{{ */
  {
  	zend_end_namespace();
  	zend_hash_destroy(&FC(seen_symbols));
  	CG(file_context) = *prev_context;
  }
  /* }}} */
  
  void zend_init_compiler_data_structures(void) /* {{{ */
  {
  	zend_stack_init(&CG(loop_var_stack), sizeof(zend_loop_var));
  	zend_stack_init(&CG(delayed_oplines_stack), sizeof(zend_op));
  	CG(active_class_entry) = NULL;
  	CG(in_compilation) = 0;
  	CG(start_lineno) = 0;
  
  	CG(encoding_declared) = 0;
  	CG(memoized_exprs) = NULL;
  	CG(memoize_mode) = 0;
  }
  /* }}} */
  
  static void zend_register_seen_symbol(zend_string *name, uint32_t kind) {
  	zval *zv = zend_hash_find(&FC(seen_symbols), name);
  	if (zv) {
  		Z_LVAL_P(zv) |= kind;
  	} else {
  		zval tmp;
  		ZVAL_LONG(&tmp, kind);
  		zend_hash_add_new(&FC(seen_symbols), name, &tmp);
  	}
  }
  
  static zend_bool zend_have_seen_symbol(zend_string *name, uint32_t kind) {
  	zval *zv = zend_hash_find(&FC(seen_symbols), name);
  	return zv && (Z_LVAL_P(zv) & kind) != 0;
  }
  
  ZEND_API void file_handle_dtor(zend_file_handle *fh) /* {{{ */
  {
  
  	zend_file_handle_dtor(fh);
  }
  /* }}} */
  
  void init_compiler(void) /* {{{ */
  {
  	CG(arena) = zend_arena_create(64 * 1024);
  	CG(active_op_array) = NULL;
  	memset(&CG(context), 0, sizeof(CG(context)));
  	zend_init_compiler_data_structures();
  	zend_init_rsrc_list();
  	zend_hash_init(&CG(filenames_table), 8, NULL, ZVAL_PTR_DTOR, 0);
  	zend_llist_init(&CG(open_files), sizeof(zend_file_handle), (void (*)(void *)) file_handle_dtor, 0);
  	CG(unclean_shutdown) = 0;
  }
  /* }}} */
  
  void shutdown_compiler(void) /* {{{ */
  {
  	zend_stack_destroy(&CG(loop_var_stack));
  	zend_stack_destroy(&CG(delayed_oplines_stack));
  	zend_hash_destroy(&CG(filenames_table));
  	zend_arena_destroy(CG(arena));
  }
  /* }}} */
  
  ZEND_API zend_string *zend_set_compiled_filename(zend_string *new_compiled_filename) /* {{{ */
  {
  	zval *p, rv;
  
  	if ((p = zend_hash_find(&CG(filenames_table), new_compiled_filename))) {
  		ZEND_ASSERT(Z_TYPE_P(p) == IS_STRING);
  		CG(compiled_filename) = Z_STR_P(p);
  		return Z_STR_P(p);
  	}
  
  	new_compiled_filename = zend_new_interned_string(zend_string_copy(new_compiled_filename));
  	ZVAL_STR(&rv, new_compiled_filename);
  	zend_hash_add_new(&CG(filenames_table), new_compiled_filename, &rv);
  
  	CG(compiled_filename) = new_compiled_filename;
  	return new_compiled_filename;
  }
  /* }}} */
  
  ZEND_API void zend_restore_compiled_filename(zend_string *original_compiled_filename) /* {{{ */
  {
  	CG(compiled_filename) = original_compiled_filename;
  }
  /* }}} */
  
  ZEND_API zend_string *zend_get_compiled_filename(void) /* {{{ */
  {
  	return CG(compiled_filename);
  }
  /* }}} */
  
  ZEND_API int zend_get_compiled_lineno(void) /* {{{ */
  {
  	return CG(zend_lineno);
  }
  /* }}} */
  
  ZEND_API zend_bool zend_is_compiling(void) /* {{{ */
  {
  	return CG(in_compilation);
  }
  /* }}} */
  
  static zend_always_inline uint32_t get_temporary_variable(void) /* {{{ */
  {
  	return (uint32_t)CG(active_op_array)->T++;
  }
  /* }}} */
  
  static int lookup_cv(zend_string *name) /* {{{ */{
  	zend_op_array *op_array = CG(active_op_array);
  	int i = 0;
  	zend_ulong hash_value = zend_string_hash_val(name);
  
  	while (i < op_array->last_var) {
  		if (ZSTR_H(op_array->vars[i]) == hash_value
  		 && zend_string_equals(op_array->vars[i], name)) {
  			return (int)(zend_intptr_t)ZEND_CALL_VAR_NUM(NULL, i);
  		}
  		i++;
  	}
  	i = op_array->last_var;
  	op_array->last_var++;
  	if (op_array->last_var > CG(context).vars_size) {
  		CG(context).vars_size += 16; /* FIXME */
  		op_array->vars = erealloc(op_array->vars, CG(context).vars_size * sizeof(zend_string*));
  	}
  
  	op_array->vars[i] = zend_string_copy(name);
  	return (int)(zend_intptr_t)ZEND_CALL_VAR_NUM(NULL, i);
  }
  /* }}} */
  
  void zend_del_literal(zend_op_array *op_array, int n) /* {{{ */
  {
  	zval_ptr_dtor_nogc(CT_CONSTANT_EX(op_array, n));
  	if (n + 1 == op_array->last_literal) {
  		op_array->last_literal--;
  	} else {
  		ZVAL_UNDEF(CT_CONSTANT_EX(op_array, n));
  	}
  }
  /* }}} */
  
  static inline zend_string *zval_make_interned_string(zval *zv) /* {{{ */
  {
  	ZEND_ASSERT(Z_TYPE_P(zv) == IS_STRING);
  	Z_STR_P(zv) = zend_new_interned_string(Z_STR_P(zv));
  	if (ZSTR_IS_INTERNED(Z_STR_P(zv))) {
  		Z_TYPE_FLAGS_P(zv) = 0;
  	}
  	return Z_STR_P(zv);
  }
  
  /* Common part of zend_add_literal and zend_append_individual_literal */
  static inline void zend_insert_literal(zend_op_array *op_array, zval *zv, int literal_position) /* {{{ */
  {
  	zval *lit = CT_CONSTANT_EX(op_array, literal_position);
  	if (Z_TYPE_P(zv) == IS_STRING) {
  		zval_make_interned_string(zv);
  	}
  	ZVAL_COPY_VALUE(lit, zv);
  	Z_EXTRA_P(lit) = 0;
  }
  /* }}} */
  
  /* Is used while compiling a function, using the context to keep track
     of an approximate size to avoid to relocate to often.
     Literals are truncated to actual size in the second compiler pass (pass_two()). */
  static int zend_add_literal(zval *zv) /* {{{ */
  {
  	zend_op_array *op_array = CG(active_op_array);
  	int i = op_array->last_literal;
  	op_array->last_literal++;
  	if (i >= CG(context).literals_size) {
  		while (i >= CG(context).literals_size) {
  			CG(context).literals_size += 16; /* FIXME */
  		}
  		op_array->literals = (zval*)erealloc(op_array->literals, CG(context).literals_size * sizeof(zval));
  	}
  	zend_insert_literal(op_array, zv, i);
  	return i;
  }
  /* }}} */
  
  static inline int zend_add_literal_string(zend_string **str) /* {{{ */
  {
  	int ret;
  	zval zv;
  	ZVAL_STR(&zv, *str);
  	ret = zend_add_literal(&zv);
  	*str = Z_STR(zv);
  	return ret;
  }
  /* }}} */
  
  static int zend_add_func_name_literal(zend_string *name) /* {{{ */
  {
  	/* Original name */
  	int ret = zend_add_literal_string(&name);
  
  	/* Lowercased name */
  	zend_string *lc_name = zend_string_tolower(name);
  	zend_add_literal_string(&lc_name);
  
  	return ret;
  }
  /* }}} */
  
  static int zend_add_ns_func_name_literal(zend_string *name) /* {{{ */
  {
  	const char *unqualified_name;
  	size_t unqualified_name_len;
  
  	/* Original name */
  	int ret = zend_add_literal_string(&name);
  
  	/* Lowercased name */
  	zend_string *lc_name = zend_string_tolower(name);
  	zend_add_literal_string(&lc_name);
  
  	/* Lowercased unqualfied name */
  	if (zend_get_unqualified_name(name, &unqualified_name, &unqualified_name_len)) {
  		lc_name = zend_string_alloc(unqualified_name_len, 0);
  		zend_str_tolower_copy(ZSTR_VAL(lc_name), unqualified_name, unqualified_name_len);
  		zend_add_literal_string(&lc_name);
  	}
  
  	return ret;
  }
  /* }}} */
  
  static int zend_add_class_name_literal(zend_string *name) /* {{{ */
  {
  	/* Original name */
  	int ret = zend_add_literal_string(&name);
  
  	/* Lowercased name */
  	zend_string *lc_name = zend_string_tolower(name);
  	zend_add_literal_string(&lc_name);
  
  	return ret;
  }
  /* }}} */
  
  static int zend_add_const_name_literal(zend_string *name, zend_bool unqualified) /* {{{ */
  {
  	zend_string *tmp_name;
  
  	int ret = zend_add_literal_string(&name);
  
  	size_t ns_len = 0, after_ns_len = ZSTR_LEN(name);
  	const char *after_ns = zend_memrchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name));
  	if (after_ns) {
  		after_ns += 1;
  		ns_len = after_ns - ZSTR_VAL(name) - 1;
  		after_ns_len = ZSTR_LEN(name) - ns_len - 1;
  
  		/* lowercased namespace name & original constant name */
  		tmp_name = zend_string_init(ZSTR_VAL(name), ZSTR_LEN(name), 0);
  		zend_str_tolower(ZSTR_VAL(tmp_name), ns_len);
  		zend_add_literal_string(&tmp_name);
  
  		if (!unqualified) {
  			return ret;
  		}
  	} else {
  		after_ns = ZSTR_VAL(name);
  	}
  
  	/* original unqualified constant name */
  	tmp_name = zend_string_init(after_ns, after_ns_len, 0);
  	zend_add_literal_string(&tmp_name);
  
  	return ret;
  }
  /* }}} */
  
  #define LITERAL_STR(op, str) do { \
  		zval _c; \
  		ZVAL_STR(&_c, str); \
  		op.constant = zend_add_literal(&_c); \
  	} while (0)
  
  void zend_stop_lexing(void)
  {
  	if (LANG_SCNG(on_event)) {
  		LANG_SCNG(on_event)(ON_STOP, END, 0, LANG_SCNG(on_event_context));
  	}
  
  	LANG_SCNG(yy_cursor) = LANG_SCNG(yy_limit);
  }
  
  static inline void zend_begin_loop(
  		zend_uchar free_opcode, const znode *loop_var, zend_bool is_switch) /* {{{ */
  {
  	zend_brk_cont_element *brk_cont_element;
  	int parent = CG(context).current_brk_cont;
  	zend_loop_var info = {0};
  
  	CG(context).current_brk_cont = CG(context).last_brk_cont;
  	brk_cont_element = get_next_brk_cont_element();
  	brk_cont_element->parent = parent;
  	brk_cont_element->is_switch = is_switch;
  
  	if (loop_var && (loop_var->op_type & (IS_VAR|IS_TMP_VAR))) {
  		uint32_t start = get_next_op_number();
  
  		info.opcode = free_opcode;
  		info.var_type = loop_var->op_type;
  		info.var_num = loop_var->u.op.var;
  		brk_cont_element->start = start;
  	} else {
  		info.opcode = ZEND_NOP;
  		/* The start field is used to free temporary variables in case of exceptions.
  		 * We won't try to free something of we don't have loop variable.  */
  		brk_cont_element->start = -1;
  	}
  
  	zend_stack_push(&CG(loop_var_stack), &info);
  }
  /* }}} */
  
  static inline void zend_end_loop(int cont_addr, const znode *var_node) /* {{{ */
  {
  	uint32_t end = get_next_op_number();
  	zend_brk_cont_element *brk_cont_element
  		= &CG(context).brk_cont_array[CG(context).current_brk_cont];
  	brk_cont_element->cont = cont_addr;
  	brk_cont_element->brk = end;
  	CG(context).current_brk_cont = brk_cont_element->parent;
  
  	zend_stack_del_top(&CG(loop_var_stack));
  }
  /* }}} */
  
  void zend_do_free(znode *op1) /* {{{ */
  {
  	if (op1->op_type == IS_TMP_VAR) {
  		zend_op *opline = &CG(active_op_array)->opcodes[CG(active_op_array)->last-1];
  
  		while (opline->opcode == ZEND_END_SILENCE) {
  			opline--;
  		}
  
  		if (opline->result_type == IS_TMP_VAR && opline->result.var == op1->u.op.var) {
  			if (opline->opcode == ZEND_BOOL || opline->opcode == ZEND_BOOL_NOT) {
  				return;
  			}
  		}
  
  		zend_emit_op(NULL, ZEND_FREE, op1, NULL);
  	} else if (op1->op_type == IS_VAR) {
  		zend_op *opline = &CG(active_op_array)->opcodes[CG(active_op_array)->last-1];
  		while (opline->opcode == ZEND_END_SILENCE ||
  				opline->opcode == ZEND_EXT_FCALL_END ||
  				opline->opcode == ZEND_OP_DATA) {
  			opline--;
  		}
  		if (opline->result_type == IS_VAR
  			&& opline->result.var == op1->u.op.var) {
  			if (opline->opcode == ZEND_FETCH_THIS) {
  				opline->opcode = ZEND_NOP;
  				opline->result_type = IS_UNUSED;
  			} else {
  				opline->result_type = IS_UNUSED;
  			}
  		} else {
  			while (opline >= CG(active_op_array)->opcodes) {
  				if ((opline->opcode == ZEND_FETCH_LIST_R ||
                       opline->opcode == ZEND_FETCH_LIST_W) &&
  				    opline->op1_type == IS_VAR &&
  				    opline->op1.var == op1->u.op.var) {
  					zend_emit_op(NULL, ZEND_FREE, op1, NULL);
  					return;
  				}
  				if (opline->result_type == IS_VAR
  					&& opline->result.var == op1->u.op.var) {
  					if (opline->opcode == ZEND_NEW) {
  						zend_emit_op(NULL, ZEND_FREE, op1, NULL);
  					}
  					break;
  				}
  				opline--;
  			}
  		}
  	} else if (op1->op_type == IS_CONST) {
  		/* Destroy value without using GC: When opcache moves arrays into SHM it will
  		 * free the zend_array structure, so references to it from outside the op array
  		 * become invalid. GC would cause such a reference in the root buffer. */
  		zval_ptr_dtor_nogc(&op1->u.constant);
  	}
  }
  /* }}} */
  
  uint32_t zend_add_class_modifier(uint32_t flags, uint32_t new_flag) /* {{{ */
  {
  	uint32_t new_flags = flags | new_flag;
  	if ((flags & ZEND_ACC_EXPLICIT_ABSTRACT_CLASS) && (new_flag & ZEND_ACC_EXPLICIT_ABSTRACT_CLASS)) {
  		zend_throw_exception(zend_ce_compile_error,
  			"Multiple abstract modifiers are not allowed", 0);
  		return 0;
  	}
  	if ((flags & ZEND_ACC_FINAL) && (new_flag & ZEND_ACC_FINAL)) {
  		zend_throw_exception(zend_ce_compile_error, "Multiple final modifiers are not allowed", 0);
  		return 0;
  	}
  	if ((new_flags & ZEND_ACC_EXPLICIT_ABSTRACT_CLASS) && (new_flags & ZEND_ACC_FINAL)) {
  		zend_throw_exception(zend_ce_compile_error,
  			"Cannot use the final modifier on an abstract class", 0);
  		return 0;
  	}
  	return new_flags;
  }
  /* }}} */
  
  uint32_t zend_add_member_modifier(uint32_t flags, uint32_t new_flag) /* {{{ */
  {
  	uint32_t new_flags = flags | new_flag;
  	if ((flags & ZEND_ACC_PPP_MASK) && (new_flag & ZEND_ACC_PPP_MASK)) {
  		zend_throw_exception(zend_ce_compile_error,
  			"Multiple access type modifiers are not allowed", 0);
  		return 0;
  	}
  	if ((flags & ZEND_ACC_ABSTRACT) && (new_flag & ZEND_ACC_ABSTRACT)) {
  		zend_throw_exception(zend_ce_compile_error, "Multiple abstract modifiers are not allowed", 0);
  		return 0;
  	}
  	if ((flags & ZEND_ACC_STATIC) && (new_flag & ZEND_ACC_STATIC)) {
  		zend_throw_exception(zend_ce_compile_error, "Multiple static modifiers are not allowed", 0);
  		return 0;
  	}
  	if ((flags & ZEND_ACC_FINAL) && (new_flag & ZEND_ACC_FINAL)) {
  		zend_throw_exception(zend_ce_compile_error, "Multiple final modifiers are not allowed", 0);
  		return 0;
  	}
  	if ((new_flags & ZEND_ACC_ABSTRACT) && (new_flags & ZEND_ACC_FINAL)) {
  		zend_throw_exception(zend_ce_compile_error,
  			"Cannot use the final modifier on an abstract class member", 0);
  		return 0;
  	}
  	return new_flags;
  }
  /* }}} */
  
  zend_string *zend_concat3(char *str1, size_t str1_len, char *str2, size_t str2_len, char *str3, size_t str3_len) /* {{{ */
  {
  	size_t len = str1_len + str2_len + str3_len;
  	zend_string *res = zend_string_alloc(len, 0);
  
  	memcpy(ZSTR_VAL(res), str1, str1_len);
  	memcpy(ZSTR_VAL(res) + str1_len, str2, str2_len);
  	memcpy(ZSTR_VAL(res) + str1_len + str2_len, str3, str3_len);
  	ZSTR_VAL(res)[len] = '\0';
  
  	return res;
  }
  
  zend_string *zend_concat_names(char *name1, size_t name1_len, char *name2, size_t name2_len) {
  	return zend_concat3(name1, name1_len, "\\", 1, name2, name2_len);
  }
  
  zend_string *zend_prefix_with_ns(zend_string *name) {
  	if (FC(current_namespace)) {
  		zend_string *ns = FC(current_namespace);
  		return zend_concat_names(ZSTR_VAL(ns), ZSTR_LEN(ns), ZSTR_VAL(name), ZSTR_LEN(name));
  	} else {
  		return zend_string_copy(name);
  	}
  }
  
  void *zend_hash_find_ptr_lc(HashTable *ht, const char *str, size_t len) {
  	void *result;
  	zend_string *lcname;
  	ALLOCA_FLAG(use_heap);
  
  	ZSTR_ALLOCA_ALLOC(lcname, len, use_heap);
  	zend_str_tolower_copy(ZSTR_VAL(lcname), str, len);
  	result = zend_hash_find_ptr(ht, lcname);
  	ZSTR_ALLOCA_FREE(lcname, use_heap);
  
  	return result;
  }
  
  zend_string *zend_resolve_non_class_name(
  	zend_string *name, uint32_t type, zend_bool *is_fully_qualified,
  	zend_bool case_sensitive, HashTable *current_import_sub
  ) {
  	char *compound;
  	*is_fully_qualified = 0;
  
  	if (ZSTR_VAL(name)[0] == '\\') {
  		/* Remove \ prefix (only relevant if this is a string rather than a label) */
  		*is_fully_qualified = 1;
  		return zend_string_init(ZSTR_VAL(name) + 1, ZSTR_LEN(name) - 1, 0);
  	}
  
  	if (type == ZEND_NAME_FQ) {
  		*is_fully_qualified = 1;
  		return zend_string_copy(name);
  	}
  
  	if (type == ZEND_NAME_RELATIVE) {
  		*is_fully_qualified = 1;
  		return zend_prefix_with_ns(name);
  	}
  
  	if (current_import_sub) {
  		/* If an unqualified name is a function/const alias, replace it. */
  		zend_string *import_name;
  		if (case_sensitive) {
  			import_name = zend_hash_find_ptr(current_import_sub, name);
  		} else {
  			import_name = zend_hash_find_ptr_lc(current_import_sub, ZSTR_VAL(name), ZSTR_LEN(name));
  		}
  
  		if (import_name) {
  			*is_fully_qualified = 1;
  			return zend_string_copy(import_name);
  		}
  	}
  
  	compound = memchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name));
  	if (compound) {
  		*is_fully_qualified = 1;
  	}
  
  	if (compound && FC(imports)) {
  		/* If the first part of a qualified name is an alias, substitute it. */
  		size_t len = compound - ZSTR_VAL(name);
  		zend_string *import_name = zend_hash_find_ptr_lc(FC(imports), ZSTR_VAL(name), len);
  
  		if (import_name) {
  			return zend_concat_names(
  				ZSTR_VAL(import_name), ZSTR_LEN(import_name), ZSTR_VAL(name) + len + 1, ZSTR_LEN(name) - len - 1);
  		}
  	}
  
  	return zend_prefix_with_ns(name);
  }
  /* }}} */
  
  zend_string *zend_resolve_function_name(zend_string *name, uint32_t type, zend_bool *is_fully_qualified) /* {{{ */
  {
  	return zend_resolve_non_class_name(
  		name, type, is_fully_qualified, 0, FC(imports_function));
  }
  /* }}} */
  
  zend_string *zend_resolve_const_name(zend_string *name, uint32_t type, zend_bool *is_fully_qualified) /* {{{ */ {
  	return zend_resolve_non_class_name(
  		name, type, is_fully_qualified, 1, FC(imports_const));
  }
  /* }}} */
  
  zend_string *zend_resolve_class_name(zend_string *name, uint32_t type) /* {{{ */
  {
  	char *compound;
  
  	if (type == ZEND_NAME_RELATIVE) {
  		return zend_prefix_with_ns(name);
  	}
  
  	if (type == ZEND_NAME_FQ || ZSTR_VAL(name)[0] == '\\') {
  		/* Remove \ prefix (only relevant if this is a string rather than a label) */
  		if (ZSTR_VAL(name)[0] == '\\') {
  			name = zend_string_init(ZSTR_VAL(name) + 1, ZSTR_LEN(name) - 1, 0);
  		} else {
  			zend_string_addref(name);
  		}
  		/* Ensure that \self, \parent and \static are not used */
  		if (ZEND_FETCH_CLASS_DEFAULT != zend_get_class_fetch_type(name)) {
  			zend_error_noreturn(E_COMPILE_ERROR, "'\\%s' is an invalid class name", ZSTR_VAL(name));
  		}
  		return name;
  	}
  
  	if (FC(imports)) {
  		compound = memchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name));
  		if (compound) {
  			/* If the first part of a qualified name is an alias, substitute it. */
  			size_t len = compound - ZSTR_VAL(name);
  			zend_string *import_name =
  				zend_hash_find_ptr_lc(FC(imports), ZSTR_VAL(name), len);
  
  			if (import_name) {
  				return zend_concat_names(
  					ZSTR_VAL(import_name), ZSTR_LEN(import_name), ZSTR_VAL(name) + len + 1, ZSTR_LEN(name) - len - 1);
  			}
  		} else {
  			/* If an unqualified name is an alias, replace it. */
  			zend_string *import_name
  				= zend_hash_find_ptr_lc(FC(imports), ZSTR_VAL(name), ZSTR_LEN(name));
  
  			if (import_name) {
  				return zend_string_copy(import_name);
  			}
  		}
  	}
  
  	/* If not fully qualified and not an alias, prepend the current namespace */
  	return zend_prefix_with_ns(name);
  }
  /* }}} */
  
  zend_string *zend_resolve_class_name_ast(zend_ast *ast) /* {{{ */
  {
  	zval *class_name = zend_ast_get_zval(ast);
  	if (Z_TYPE_P(class_name) != IS_STRING) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Illegal class name");
  	}
  	return zend_resolve_class_name(Z_STR_P(class_name), ast->attr);
  }
  /* }}} */
  
  static void label_ptr_dtor(zval *zv) /* {{{ */
  {
  	efree_size(Z_PTR_P(zv), sizeof(zend_label));
  }
  /* }}} */
  
  static void str_dtor(zval *zv)  /* {{{ */ {
  	zend_string_release_ex(Z_STR_P(zv), 0);
  }
  /* }}} */
  
  static zend_bool zend_is_call(zend_ast *ast);
  
  static uint32_t zend_add_try_element(uint32_t try_op) /* {{{ */
  {
  	zend_op_array *op_array = CG(active_op_array);
  	uint32_t try_catch_offset = op_array->last_try_catch++;
  	zend_try_catch_element *elem;
  
  	op_array->try_catch_array = safe_erealloc(
  		op_array->try_catch_array, sizeof(zend_try_catch_element), op_array->last_try_catch, 0);
  
  	elem = &op_array->try_catch_array[try_catch_offset];
  	elem->try_op = try_op;
  	elem->catch_op = 0;
  	elem->finally_op = 0;
  	elem->finally_end = 0;
  
  	return try_catch_offset;
  }
  /* }}} */
  
  ZEND_API void function_add_ref(zend_function *function) /* {{{ */
  {
  	if (function->type == ZEND_USER_FUNCTION) {
  		zend_op_array *op_array = &function->op_array;
  
  		if (op_array->refcount) {
  			(*op_array->refcount)++;
  		}
  		if (op_array->static_variables) {
  			if (!(GC_FLAGS(op_array->static_variables) & IS_ARRAY_IMMUTABLE)) {
  				GC_ADDREF(op_array->static_variables);
  			}
  		}
  		ZEND_MAP_PTR_INIT(op_array->static_variables_ptr, &op_array->static_variables);
  		ZEND_MAP_PTR_INIT(op_array->run_time_cache, zend_arena_alloc(&CG(arena), sizeof(void*)));
  		ZEND_MAP_PTR_SET(op_array->run_time_cache, NULL);
  	} else if (function->type == ZEND_INTERNAL_FUNCTION) {
  		if (function->common.function_name) {
  			zend_string_addref(function->common.function_name);
  		}
  	}
  }
  /* }}} */
  
  static zend_never_inline ZEND_COLD ZEND_NORETURN void do_bind_function_error(zend_string *lcname, zend_op_array *op_array, zend_bool compile_time) /* {{{ */
  {
  	zval *zv = zend_hash_find_ex(compile_time ? CG(function_table) : EG(function_table), lcname, 1);
  	int error_level = compile_time ? E_COMPILE_ERROR : E_ERROR;
  	zend_function *old_function;
  
  	ZEND_ASSERT(zv != NULL);
  	old_function = (zend_function*)Z_PTR_P(zv);
  	if (old_function->type == ZEND_USER_FUNCTION
  		&& old_function->op_array.last > 0) {
  		zend_error_noreturn(error_level, "Cannot redeclare %s() (previously declared in %s:%d)",
  					op_array ? ZSTR_VAL(op_array->function_name) : ZSTR_VAL(old_function->common.function_name),
  					ZSTR_VAL(old_function->op_array.filename),
  					old_function->op_array.opcodes[0].lineno);
  	} else {
  		zend_error_noreturn(error_level, "Cannot redeclare %s()",
  			op_array ? ZSTR_VAL(op_array->function_name) : ZSTR_VAL(old_function->common.function_name));
  	}
  }
  
  ZEND_API int do_bind_function(zval *lcname) /* {{{ */
  {
  	zend_function *function;
  	zval *rtd_key, *zv;
  
  	rtd_key = lcname + 1;
  	zv = zend_hash_find_ex(EG(function_table), Z_STR_P(rtd_key), 1);
  	if (UNEXPECTED(!zv)) {
  		do_bind_function_error(Z_STR_P(lcname), NULL, 0);
  		return FAILURE;
  	}
  	function = (zend_function*)Z_PTR_P(zv);
  	zv = zend_hash_set_bucket_key(EG(function_table), (Bucket*)zv, Z_STR_P(lcname));
  	if (UNEXPECTED(!zv)) {
  		do_bind_function_error(Z_STR_P(lcname), &function->op_array, 0);
  		return FAILURE;
  	}
  	return SUCCESS;
  }
  /* }}} */
  
  ZEND_API int do_bind_class(zval *lcname, zend_class_entry *parent_ce) /* {{{ */
  {
  	zend_class_entry *ce;
  	zval *rtd_key, *zv;
  
  	rtd_key = lcname + 1;
  
  	zv = zend_hash_find_ex(EG(class_table), Z_STR_P(rtd_key), 1);
  
  	if (UNEXPECTED(!zv)) {
  		/* If we're in compile time, in practice, it's quite possible
  		 * that we'll never reach this class declaration at runtime,
  		 * so we shut up about it.  This allows the if (!defined('FOO')) { return; }
  		 * approach to work.
  		 */
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare  %s, because the name is already in use", Z_STRVAL_P(lcname));
  		return FAILURE;
  	}
  
  	/* Register the derived class */
  	ce = (zend_class_entry*)Z_PTR_P(zv);
  	zv = zend_hash_set_bucket_key(EG(class_table), (Bucket*)zv, Z_STR_P(lcname));
  	if (UNEXPECTED(!zv)) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare %s %s, because the name is already in use", zend_get_object_type(ce), ZSTR_VAL(ce->name));
  		return FAILURE;
  	}
  
  	zend_do_link_class(ce, parent_ce);
  	return SUCCESS;
  }
  /* }}} */
  
  static void zend_mark_function_as_generator() /* {{{ */
  {
  	if (!CG(active_op_array)->function_name) {
  		zend_error_noreturn(E_COMPILE_ERROR,
  			"The \"yield\" expression can only be used inside a function");
  	}
  
  	if (CG(active_op_array)->fn_flags & ZEND_ACC_HAS_RETURN_TYPE) {
  		zend_arg_info return_info = CG(active_op_array)->arg_info[-1];
  
  		if (ZEND_TYPE_CODE(return_info.type) != IS_ITERABLE) {
  			const char *msg = "Generators may only declare a return type of Generator, Iterator, Traversable, or iterable, %s is not permitted";
  
  			if (!ZEND_TYPE_IS_CLASS(return_info.type)) {
  				zend_error_noreturn(E_COMPILE_ERROR, msg, zend_get_type_by_const(ZEND_TYPE_CODE(return_info.type)));
  			}
  
  			if (!zend_string_equals_literal_ci(ZEND_TYPE_NAME(return_info.type), "Traversable")
  				&& !zend_string_equals_literal_ci(ZEND_TYPE_NAME(return_info.type), "Iterator")
  				&& !zend_string_equals_literal_ci(ZEND_TYPE_NAME(return_info.type), "Generator")) {
  				zend_error_noreturn(E_COMPILE_ERROR, msg, ZSTR_VAL(ZEND_TYPE_NAME(return_info.type)));
  			}
  		}
  	}
  
  	CG(active_op_array)->fn_flags |= ZEND_ACC_GENERATOR;
  }
  /* }}} */
  
  ZEND_API uint32_t zend_build_delayed_early_binding_list(const zend_op_array *op_array) /* {{{ */
  {
  	if (op_array->fn_flags & ZEND_ACC_EARLY_BINDING) {
  		uint32_t  first_early_binding_opline = (uint32_t)-1;
  		uint32_t *prev_opline_num = &first_early_binding_opline;
  		zend_op  *opline = op_array->opcodes;
  		zend_op  *end = opline + op_array->last;
  
  		while (opline < end) {
  			if (opline->opcode == ZEND_DECLARE_INHERITED_CLASS_DELAYED) {
  				*prev_opline_num = opline - op_array->opcodes;
  				prev_opline_num = &opline->result.opline_num;
  			}
  			++opline;
  		}
  		*prev_opline_num = -1;
  		return first_early_binding_opline;
  	}
  	return (uint32_t)-1;
  }
  /* }}} */
  
  ZEND_API void zend_do_delayed_early_binding(const zend_op_array *op_array, uint32_t first_early_binding_opline) /* {{{ */
  {
  	if (first_early_binding_opline != (uint32_t)-1) {
  		zend_bool orig_in_compilation = CG(in_compilation);
  		uint32_t opline_num = first_early_binding_opline;
  		zend_class_entry *ce;
  
  		CG(in_compilation) = 1;
  		while (opline_num != (uint32_t)-1) {
  			const zend_op *opline = &op_array->opcodes[opline_num];
  			zval *parent_name = RT_CONSTANT(opline, opline->op2);
  			if ((ce = zend_lookup_class_ex(Z_STR_P(parent_name), Z_STR_P(parent_name + 1), 0)) != NULL) {
  				do_bind_class(RT_CONSTANT(&op_array->opcodes[opline_num], op_array->opcodes[opline_num].op1), ce);
  			}
  			opline_num = op_array->opcodes[opline_num].result.opline_num;
  		}
  		CG(in_compilation) = orig_in_compilation;
  	}
  }
  /* }}} */
  
  ZEND_API zend_string *zend_mangle_property_name(const char *src1, size_t src1_length, const char *src2, size_t src2_length, int internal) /* {{{ */
  {
  	size_t prop_name_length = 1 + src1_length + 1 + src2_length;
  	zend_string *prop_name = zend_string_alloc(prop_name_length, internal);
  
  	ZSTR_VAL(prop_name)[0] = '\0';
  	memcpy(ZSTR_VAL(prop_name) + 1, src1, src1_length+1);
  	memcpy(ZSTR_VAL(prop_name) + 1 + src1_length + 1, src2, src2_length+1);
  	return prop_name;
  }
  /* }}} */
  
  static zend_always_inline size_t zend_strnlen(const char* s, size_t maxlen) /* {{{ */
  {
  	size_t len = 0;
  	while (*s++ && maxlen--) len++;
  	return len;
  }
  /* }}} */
  
  ZEND_API int zend_unmangle_property_name_ex(const zend_string *name, const char **class_name, const char **prop_name, size_t *prop_len) /* {{{ */
  {
  	size_t class_name_len;
  	size_t anonclass_src_len;
  
  	*class_name = NULL;
  
  	if (!ZSTR_LEN(name) || ZSTR_VAL(name)[0] != '\0') {
  		*prop_name = ZSTR_VAL(name);
  		if (prop_len) {
  			*prop_len = ZSTR_LEN(name);
  		}
  		return SUCCESS;
  	}
  	if (ZSTR_LEN(name) < 3 || ZSTR_VAL(name)[1] == '\0') {
  		zend_error(E_NOTICE, "Illegal member variable name");
  		*prop_name = ZSTR_VAL(name);
  		if (prop_len) {
  			*prop_len = ZSTR_LEN(name);
  		}
  		return FAILURE;
  	}
  
  	class_name_len = zend_strnlen(ZSTR_VAL(name) + 1, ZSTR_LEN(name) - 2);
  	if (class_name_len >= ZSTR_LEN(name) - 2 || ZSTR_VAL(name)[class_name_len + 1] != '\0') {
  		zend_error(E_NOTICE, "Corrupt member variable name");
  		*prop_name = ZSTR_VAL(name);
  		if (prop_len) {
  			*prop_len = ZSTR_LEN(name);
  		}
  		return FAILURE;
  	}
  
  	*class_name = ZSTR_VAL(name) + 1;
  	anonclass_src_len = zend_strnlen(*class_name + class_name_len + 1, ZSTR_LEN(name) - class_name_len - 2);
  	if (class_name_len + anonclass_src_len + 2 != ZSTR_LEN(name)) {
  		class_name_len += anonclass_src_len + 1;
  	}
  	*prop_name = ZSTR_VAL(name) + class_name_len + 2;
  	if (prop_len) {
  		*prop_len = ZSTR_LEN(name) - class_name_len - 2;
  	}
  	return SUCCESS;
  }
  /* }}} */
  
  static zend_bool zend_try_ct_eval_const(zval *zv, zend_string *name, zend_bool is_fully_qualified) /* {{{ */
  {
  	zend_constant *c = zend_hash_find_ptr(EG(zend_constants), name);
  	if (c && (
  	      ((ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT)
  	      && !(CG(compiler_options) & ZEND_COMPILE_NO_PERSISTENT_CONSTANT_SUBSTITUTION)
  	      && (!(ZEND_CONSTANT_FLAGS(c) & CONST_NO_FILE_CACHE) || !(CG(compiler_options) & ZEND_COMPILE_WITH_FILE_CACHE)))
  	   || (Z_TYPE(c->value) < IS_OBJECT && !(CG(compiler_options) & ZEND_COMPILE_NO_CONSTANT_SUBSTITUTION))
  	)) {
  		ZVAL_COPY_OR_DUP(zv, &c->value);
  		return 1;
  	}
  
  	{
  		/* Substitute true, false and null (including unqualified usage in namespaces) */
  		const char *lookup_name = ZSTR_VAL(name);
  		size_t lookup_len = ZSTR_LEN(name);
  		zval *val;
  
  		if (!is_fully_qualified) {
  			zend_get_unqualified_name(name, &lookup_name, &lookup_len);
  		}
  
  		if ((val = zend_get_special_const(lookup_name, lookup_len))) {
  			ZVAL_COPY_VALUE(zv, val);
  			return 1;
  		}
  
  		return 0;
  	}
  }
  /* }}} */
  
  static inline zend_bool zend_is_scope_known() /* {{{ */
  {
  	if (CG(active_op_array)->fn_flags & ZEND_ACC_CLOSURE) {
  		/* Closures can be rebound to a different scope */
  		return 0;
  	}
  
  	if (!CG(active_class_entry)) {
  		/* The scope is known if we're in a free function (no scope), but not if we're in
  		 * a file/eval (which inherits including/eval'ing scope). */
  		return CG(active_op_array)->function_name != NULL;
  	}
  
  	/* For traits self etc refers to the using class, not the trait itself */
  	return (CG(active_class_entry)->ce_flags & ZEND_ACC_TRAIT) == 0;
  }
  /* }}} */
  
  static inline zend_bool class_name_refers_to_active_ce(zend_string *class_name, uint32_t fetch_type) /* {{{ */
  {
  	if (!CG(active_class_entry)) {
  		return 0;
  	}
  	if (fetch_type == ZEND_FETCH_CLASS_SELF && zend_is_scope_known()) {
  		return 1;
  	}
  	return fetch_type == ZEND_FETCH_CLASS_DEFAULT
  		&& zend_string_equals_ci(class_name, CG(active_class_entry)->name);
  }
  /* }}} */
  
  uint32_t zend_get_class_fetch_type(zend_string *name) /* {{{ */
  {
  	if (zend_string_equals_literal_ci(name, "self")) {
  		return ZEND_FETCH_CLASS_SELF;
  	} else if (zend_string_equals_literal_ci(name, "parent")) {
  		return ZEND_FETCH_CLASS_PARENT;
  	} else if (zend_string_equals_literal_ci(name, "static")) {
  		return ZEND_FETCH_CLASS_STATIC;
  	} else {
  		return ZEND_FETCH_CLASS_DEFAULT;
  	}
  }
  /* }}} */
  
  static uint32_t zend_get_class_fetch_type_ast(zend_ast *name_ast) /* {{{ */
  {
  	/* Fully qualified names are always default refs */
  	if (name_ast->attr == ZEND_NAME_FQ) {
  		return ZEND_FETCH_CLASS_DEFAULT;
  	}
  
  	return zend_get_class_fetch_type(zend_ast_get_str(name_ast));
  }
  /* }}} */
  
  static void zend_ensure_valid_class_fetch_type(uint32_t fetch_type) /* {{{ */
  {
  	if (fetch_type != ZEND_FETCH_CLASS_DEFAULT && zend_is_scope_known()) {
  		zend_class_entry *ce = CG(active_class_entry);
  		if (!ce) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use \"%s\" when no class scope is active",
  				fetch_type == ZEND_FETCH_CLASS_SELF ? "self" :
  				fetch_type == ZEND_FETCH_CLASS_PARENT ? "parent" : "static");
  		} else if (fetch_type == ZEND_FETCH_CLASS_PARENT && !ce->parent_name) {
  			zend_error_noreturn(E_COMPILE_ERROR,
  				"Cannot use \"parent\" when current class scope has no parent");
  		}
  	}
  }
  /* }}} */
  
  static zend_bool zend_try_compile_const_expr_resolve_class_name(zval *zv, zend_ast *class_ast) /* {{{ */
  {
  	uint32_t fetch_type;
  	zval *class_name;
  
  	if (class_ast->kind != ZEND_AST_ZVAL) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot use ::class with dynamic class name");
  	}
  
  	class_name = zend_ast_get_zval(class_ast);
  
  	if (Z_TYPE_P(class_name) != IS_STRING) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Illegal class name");
  	}
  
  	fetch_type = zend_get_class_fetch_type(Z_STR_P(class_name));
  	zend_ensure_valid_class_fetch_type(fetch_type);
  
  	switch (fetch_type) {
  		case ZEND_FETCH_CLASS_SELF:
  			if (CG(active_class_entry) && zend_is_scope_known()) {
  				ZVAL_STR_COPY(zv, CG(active_class_entry)->name);
  				return 1;
  			}
  			return 0;
  		case ZEND_FETCH_CLASS_PARENT:
  			if (CG(active_class_entry) && CG(active_class_entry)->parent_name
  					&& zend_is_scope_known()) {
  				ZVAL_STR_COPY(zv, CG(active_class_entry)->parent_name);
  				return 1;
  			}
  			return 0;
  		case ZEND_FETCH_CLASS_STATIC:
  			return 0;
  		case ZEND_FETCH_CLASS_DEFAULT:
  			ZVAL_STR(zv, zend_resolve_class_name_ast(class_ast));
  			return 1;
  		EMPTY_SWITCH_DEFAULT_CASE()
  	}
  }
  /* }}} */
  
  static zend_bool zend_try_ct_eval_class_const(zval *zv, zend_string *class_name, zend_string *name) /* {{{ */
  {
  	uint32_t fetch_type = zend_get_class_fetch_type(class_name);
  	zend_class_constant *cc;
  	zval *c;
  
  	if (class_name_refers_to_active_ce(class_name, fetch_type)) {
  		cc = zend_hash_find_ptr(&CG(active_class_entry)->constants_table, name);
  	} else if (fetch_type == ZEND_FETCH_CLASS_DEFAULT && !(CG(compiler_options) & ZEND_COMPILE_NO_CONSTANT_SUBSTITUTION)) {
  		zend_class_entry *ce = zend_hash_find_ptr_lc(CG(class_table), ZSTR_VAL(class_name), ZSTR_LEN(class_name));
  		if (ce) {
  			cc = zend_hash_find_ptr(&ce->constants_table, name);
  		} else {
  			return 0;
  		}
  	} else {
  		return 0;
  	}
  
  	if (CG(compiler_options) & ZEND_COMPILE_NO_PERSISTENT_CONSTANT_SUBSTITUTION) {
  		return 0;
  	}
  
  	if (!cc || !zend_verify_const_access(cc, CG(active_class_entry))) {
  		return 0;
  	}
  
  	c = &cc->value;
  
  	/* Substitute case-sensitive (or lowercase) persistent class constants */
  	if (Z_TYPE_P(c) < IS_OBJECT) {
  		ZVAL_COPY_OR_DUP(zv, c);
  		return 1;
  	}
  
  	return 0;
  }
  /* }}} */
  
  static void zend_add_to_list(void *result, void *item) /* {{{ */
  {
  	void** list = *(void**)result;
  	size_t n = 0;
  
  	if (list) {
  		while (list[n]) {
  			n++;
  		}
  	}
  
  	list = erealloc(list, sizeof(void*) * (n+2));
  
  	list[n]   = item;
  	list[n+1] = NULL;
  
  	*(void**)result = list;
  }
  /* }}} */
  
  void zend_do_extended_stmt(void) /* {{{ */
  {
  	zend_op *opline;
  
  	if (!(CG(compiler_options) & ZEND_COMPILE_EXTENDED_STMT)) {
  		return;
  	}
  
  	opline = get_next_op();
  
  	opline->opcode = ZEND_EXT_STMT;
  }
  /* }}} */
  
  void zend_do_extended_fcall_begin(void) /* {{{ */
  {
  	zend_op *opline;
  
  	if (!(CG(compiler_options) & ZEND_COMPILE_EXTENDED_FCALL)) {
  		return;
  	}
  
  	opline = get_next_op();
  
  	opline->opcode = ZEND_EXT_FCALL_BEGIN;
  }
  /* }}} */
  
  void zend_do_extended_fcall_end(void) /* {{{ */
  {
  	zend_op *opline;
  
  	if (!(CG(compiler_options) & ZEND_COMPILE_EXTENDED_FCALL)) {
  		return;
  	}
  
  	opline = get_next_op();
  
  	opline->opcode = ZEND_EXT_FCALL_END;
  }
  /* }}} */
  
  zend_bool zend_is_auto_global_str(char *name, size_t len) /* {{{ */ {
  	zend_auto_global *auto_global;
  
  	if ((auto_global = zend_hash_str_find_ptr(CG(auto_globals), name, len)) != NULL) {
  		if (auto_global->armed) {
  			auto_global->armed = auto_global->auto_global_callback(auto_global->name);
  		}
  		return 1;
  	}
  	return 0;
  }
  /* }}} */
  
  zend_bool zend_is_auto_global(zend_string *name) /* {{{ */
  {
  	zend_auto_global *auto_global;
  
  	if ((auto_global = zend_hash_find_ptr(CG(auto_globals), name)) != NULL) {
  		if (auto_global->armed) {
  			auto_global->armed = auto_global->auto_global_callback(auto_global->name);
  		}
  		return 1;
  	}
  	return 0;
  }
  /* }}} */
  
  int zend_register_auto_global(zend_string *name, zend_bool jit, zend_auto_global_callback auto_global_callback) /* {{{ */
  {
  	zend_auto_global auto_global;
  	int retval;
  
  	auto_global.name = name;
  	auto_global.auto_global_callback = auto_global_callback;
  	auto_global.jit = jit;
  
  	retval = zend_hash_add_mem(CG(auto_globals), auto_global.name, &auto_global, sizeof(zend_auto_global)) != NULL ? SUCCESS : FAILURE;
  
  	return retval;
  }
  /* }}} */
  
  ZEND_API void zend_activate_auto_globals(void) /* {{{ */
  {
  	zend_auto_global *auto_global;
  
  	ZEND_HASH_FOREACH_PTR(CG(auto_globals), auto_global) {
  		if (auto_global->jit) {
  			auto_global->armed = 1;
  		} else if (auto_global->auto_global_callback) {
  			auto_global->armed = auto_global->auto_global_callback(auto_global->name);
  		} else {
  			auto_global->armed = 0;
  		}
  	} ZEND_HASH_FOREACH_END();
  }
  /* }}} */
  
  int ZEND_FASTCALL zendlex(zend_parser_stack_elem *elem) /* {{{ */
  {
  	zval zv;
  
  	if (CG(increment_lineno)) {
  		CG(zend_lineno)++;
  		CG(increment_lineno) = 0;
  	}
  
  	return lex_scan(&zv, elem);
  }
  /* }}} */
  
  ZEND_API void zend_initialize_class_data(zend_class_entry *ce, zend_bool nullify_handlers) /* {{{ */
  {
  	zend_bool persistent_hashes = ce->type == ZEND_INTERNAL_CLASS;
  
  	ce->refcount = 1;
  	ce->ce_flags = ZEND_ACC_CONSTANTS_UPDATED;
  
  	if (CG(compiler_options) & ZEND_COMPILE_GUARDS) {
  		ce->ce_flags |= ZEND_ACC_USE_GUARDS;
  	}
  
  	ce->default_properties_table = NULL;
  	ce->default_static_members_table = NULL;
  	zend_hash_init_ex(&ce->properties_info, 8, NULL, (persistent_hashes ? zend_destroy_property_info_internal : NULL), persistent_hashes, 0);
  	zend_hash_init_ex(&ce->constants_table, 8, NULL, NULL, persistent_hashes, 0);
  	zend_hash_init_ex(&ce->function_table, 8, NULL, ZEND_FUNCTION_DTOR, persistent_hashes, 0);
  
  	if (ce->type == ZEND_INTERNAL_CLASS) {
  		ZEND_MAP_PTR_INIT(ce->static_members_table, NULL);
  	} else {
  		ZEND_MAP_PTR_INIT(ce->static_members_table, &ce->default_static_members_table);
  		ce->info.user.doc_comment = NULL;
  	}
  
  	ce->default_properties_count = 0;
  	ce->default_static_members_count = 0;
  	ce->properties_info_table = NULL;
  
  	if (nullify_handlers) {
  		ce->constructor = NULL;
  		ce->destructor = NULL;
  		ce->clone = NULL;
  		ce->__get = NULL;
  		ce->__set = NULL;
  		ce->__unset = NULL;
  		ce->__isset = NULL;
  		ce->__call = NULL;
  		ce->__callstatic = NULL;
  		ce->__tostring = NULL;
  		ce->create_object = NULL;
  		ce->get_iterator = NULL;
  		ce->iterator_funcs_ptr = NULL;
  		ce->get_static_method = NULL;
  		ce->parent = NULL;
  		ce->parent_name = NULL;
  		ce->num_interfaces = 0;
  		ce->interfaces = NULL;
  		ce->num_traits = 0;
  		ce->trait_names = NULL;
  		ce->trait_aliases = NULL;
  		ce->trait_precedences = NULL;
  		ce->serialize = NULL;
  		ce->unserialize = NULL;
  		ce->serialize_func = NULL;
  		ce->unserialize_func = NULL;
  		ce->__debugInfo = NULL;
  		if (ce->type == ZEND_INTERNAL_CLASS) {
  			ce->info.internal.module = NULL;
  			ce->info.internal.builtin_functions = NULL;
  		}
  	}
  }
  /* }}} */
  
  ZEND_API zend_string *zend_get_compiled_variable_name(const zend_op_array *op_array, uint32_t var) /* {{{ */
  {
  	return op_array->vars[EX_VAR_TO_NUM(var)];
  }
  /* }}} */
  
  zend_ast *zend_ast_append_str(zend_ast *left_ast, zend_ast *right_ast) /* {{{ */
  {
  	zval *left_zv = zend_ast_get_zval(left_ast);
  	zend_string *left = Z_STR_P(left_zv);
  	zend_string *right = zend_ast_get_str(right_ast);
  
  	zend_string *result;
  	size_t left_len = ZSTR_LEN(left);
  	size_t len = left_len + ZSTR_LEN(right) + 1; /* left\right */
  
  	result = zend_string_extend(left, len, 0);
  	ZSTR_VAL(result)[left_len] = '\\';
  	memcpy(&ZSTR_VAL(result)[left_len + 1], ZSTR_VAL(right), ZSTR_LEN(right));
  	ZSTR_VAL(result)[len] = '\0';
  	zend_string_release_ex(right, 0);
  
  	ZVAL_STR(left_zv, result);
  	return left_ast;
  }
  /* }}} */
  
  zend_ast *zend_negate_num_string(zend_ast *ast) /* {{{ */
  {
  	zval *zv = zend_ast_get_zval(ast);
  	if (Z_TYPE_P(zv) == IS_LONG) {
  		if (Z_LVAL_P(zv) == 0) {
  			ZVAL_NEW_STR(zv, zend_string_init("-0", sizeof("-0")-1, 0));
  		} else {
  			ZEND_ASSERT(Z_LVAL_P(zv) > 0);
  			Z_LVAL_P(zv) *= -1;
  		}
  	} else if (Z_TYPE_P(zv) == IS_STRING) {
  		size_t orig_len = Z_STRLEN_P(zv);
  		Z_STR_P(zv) = zend_string_extend(Z_STR_P(zv), orig_len + 1, 0);
  		memmove(Z_STRVAL_P(zv) + 1, Z_STRVAL_P(zv), orig_len + 1);
  		Z_STRVAL_P(zv)[0] = '-';
  	} else {
  		ZEND_ASSERT(0);
  	}
  	return ast;
  }
  /* }}} */
  
  void zend_verify_namespace(void) /* {{{ */
  {
  	if (FC(has_bracketed_namespaces) && !FC(in_namespace)) {
  		zend_error_noreturn(E_COMPILE_ERROR, "No code may exist outside of namespace {}");
  	}
  }
  /* }}} */
  
  /* {{{ zend_dirname
     Returns directory name component of path */
  ZEND_API size_t zend_dirname(char *path, size_t len)
  {
  	register char *end = path + len - 1;
  	unsigned int len_adjust = 0;
  
  #ifdef ZEND_WIN32
  	/* Note that on Win32 CWD is per drive (heritage from CP/M).
  	 * This means dirname("c:foo") maps to "c:." or "c:" - which means CWD on C: drive.
  	 */
  	if ((2 <= len) && isalpha((int)((unsigned char *)path)[0]) && (':' == path[1])) {
  		/* Skip over the drive spec (if any) so as not to change */
  		path += 2;
  		len_adjust += 2;
  		if (2 == len) {
  			/* Return "c:" on Win32 for dirname("c:").
  			 * It would be more consistent to return "c:."
  			 * but that would require making the string *longer*.
  			 */
  			return len;
  		}
  	}
  #endif
  
  	if (len == 0) {
  		/* Illegal use of this function */
  		return 0;
  	}
  
  	/* Strip trailing slashes */
  	while (end >= path && IS_SLASH_P(end)) {
  		end--;
  	}
  	if (end < path) {
  		/* The path only contained slashes */
  		path[0] = DEFAULT_SLASH;
  		path[1] = '\0';
  		return 1 + len_adjust;
  	}
  
  	/* Strip filename */
  	while (end >= path && !IS_SLASH_P(end)) {
  		end--;
  	}
  	if (end < path) {
  		/* No slash found, therefore return '.' */
  		path[0] = '.';
  		path[1] = '\0';
  		return 1 + len_adjust;
  	}
  
  	/* Strip slashes which came before the file name */
  	while (end >= path && IS_SLASH_P(end)) {
  		end--;
  	}
  	if (end < path) {
  		path[0] = DEFAULT_SLASH;
  		path[1] = '\0';
  		return 1 + len_adjust;
  	}
  	*(end+1) = '\0';
  
  	return (size_t)(end + 1 - path) + len_adjust;
  }
  /* }}} */
  
  static void zend_adjust_for_fetch_type(zend_op *opline, znode *result, uint32_t type) /* {{{ */
  {
  	zend_uchar factor = (opline->opcode == ZEND_FETCH_STATIC_PROP_R) ? 1 : 3;
  
  	switch (type) {
  		case BP_VAR_R:
  			opline->result_type = IS_TMP_VAR;
  			result->op_type = IS_TMP_VAR;
  			return;
  		case BP_VAR_W:
  			opline->opcode += 1 * factor;
  			return;
  		case BP_VAR_RW:
  			opline->opcode += 2 * factor;
  			return;
  		case BP_VAR_IS:
  			opline->result_type = IS_TMP_VAR;
  			result->op_type = IS_TMP_VAR;
  			opline->opcode += 3 * factor;
  			return;
  		case BP_VAR_FUNC_ARG:
  			opline->opcode += 4 * factor;
  			return;
  		case BP_VAR_UNSET:
  			opline->opcode += 5 * factor;
  			return;
  		EMPTY_SWITCH_DEFAULT_CASE()
  	}
  }
  /* }}} */
  
  static inline void zend_make_var_result(znode *result, zend_op *opline) /* {{{ */
  {
  	opline->result_type = IS_VAR;
  	opline->result.var = get_temporary_variable();
  	GET_NODE(result, opline->result);
  }
  /* }}} */
  
  static inline void zend_make_tmp_result(znode *result, zend_op *opline) /* {{{ */
  {
  	opline->result_type = IS_TMP_VAR;
  	opline->result.var = get_temporary_variable();
  	GET_NODE(result, opline->result);
  }
  /* }}} */
  
  static zend_op *zend_emit_op(znode *result, zend_uchar opcode, znode *op1, znode *op2) /* {{{ */
  {
  	zend_op *opline = get_next_op();
  	opline->opcode = opcode;
  
  	if (op1 != NULL) {
  		SET_NODE(opline->op1, op1);
  	}
  
  	if (op2 != NULL) {
  		SET_NODE(opline->op2, op2);
  	}
  
  	if (result) {
  		zend_make_var_result(result, opline);
  	}
  	return opline;
  }
  /* }}} */
  
  static zend_op *zend_emit_op_tmp(znode *result, zend_uchar opcode, znode *op1, znode *op2) /* {{{ */
  {
  	zend_op *opline = get_next_op();
  	opline->opcode = opcode;
  
  	if (op1 != NULL) {
  		SET_NODE(opline->op1, op1);
  	}
  
  	if (op2 != NULL) {
  		SET_NODE(opline->op2, op2);
  	}
  
  	if (result) {
  		zend_make_tmp_result(result, opline);
  	}
  
  	return opline;
  }
  /* }}} */
  
  static void zend_emit_tick(void) /* {{{ */
  {
  	zend_op *opline;
  
  	/* This prevents a double TICK generated by the parser statement of "declare()" */
  	if (CG(active_op_array)->last && CG(active_op_array)->opcodes[CG(active_op_array)->last - 1].opcode == ZEND_TICKS) {
  		return;
  	}
  
  	opline = get_next_op();
  
  	opline->opcode = ZEND_TICKS;
  	opline->extended_value = FC(declarables).ticks;
  }
  /* }}} */
  
  static inline zend_op *zend_emit_op_data(znode *value) /* {{{ */
  {
  	return zend_emit_op(NULL, ZEND_OP_DATA, value, NULL);
  }
  /* }}} */
  
  static inline uint32_t zend_emit_jump(uint32_t opnum_target) /* {{{ */
  {
  	uint32_t opnum = get_next_op_number();
  	zend_op *opline = zend_emit_op(NULL, ZEND_JMP, NULL, NULL);
  	opline->op1.opline_num = opnum_target;
  	return opnum;
  }
  /* }}} */
  
  ZEND_API int zend_is_smart_branch(zend_op *opline) /* {{{ */
  {
  	switch (opline->opcode) {
  		case ZEND_IS_IDENTICAL:
  		case ZEND_IS_NOT_IDENTICAL:
  		case ZEND_IS_EQUAL:
  		case ZEND_IS_NOT_EQUAL:
  		case ZEND_IS_SMALLER:
  		case ZEND_IS_SMALLER_OR_EQUAL:
  		case ZEND_CASE:
  		case ZEND_ISSET_ISEMPTY_CV:
  		case ZEND_ISSET_ISEMPTY_VAR:
  		case ZEND_ISSET_ISEMPTY_DIM_OBJ:
  		case ZEND_ISSET_ISEMPTY_PROP_OBJ:
  		case ZEND_ISSET_ISEMPTY_STATIC_PROP:
  		case ZEND_INSTANCEOF:
  		case ZEND_TYPE_CHECK:
  		case ZEND_DEFINED:
  		case ZEND_IN_ARRAY:
  		case ZEND_ARRAY_KEY_EXISTS:
  			return 1;
  		default:
  			return 0;
  	}
  }
  /* }}} */
  
  static inline uint32_t zend_emit_cond_jump(zend_uchar opcode, znode *cond, uint32_t opnum_target) /* {{{ */
  {
  	uint32_t opnum = get_next_op_number();
  	zend_op *opline;
  
  	if ((cond->op_type & (IS_CV|IS_CONST))
  	 && opnum > 0
  	 && zend_is_smart_branch(CG(active_op_array)->opcodes + opnum - 1)) {
  		/* emit extra NOP to avoid incorrect SMART_BRANCH in very rare cases */
  		zend_emit_op(NULL, ZEND_NOP, NULL, NULL);
  		opnum = get_next_op_number();
  	}
  	opline = zend_emit_op(NULL, opcode, cond, NULL);
  	opline->op2.opline_num = opnum_target;
  	return opnum;
  }
  /* }}} */
  
  static inline void zend_update_jump_target(uint32_t opnum_jump, uint32_t opnum_target) /* {{{ */
  {
  	zend_op *opline = &CG(active_op_array)->opcodes[opnum_jump];
  	switch (opline->opcode) {
  		case ZEND_JMP:
  			opline->op1.opline_num = opnum_target;
  			break;
  		case ZEND_JMPZ:
  		case ZEND_JMPNZ:
  		case ZEND_JMPZ_EX:
  		case ZEND_JMPNZ_EX:
  		case ZEND_JMP_SET:
  		case ZEND_COALESCE:
  			opline->op2.opline_num = opnum_target;
  			break;
  		EMPTY_SWITCH_DEFAULT_CASE()
  	}
  }
  /* }}} */
  
  static inline void zend_update_jump_target_to_next(uint32_t opnum_jump) /* {{{ */
  {
  	zend_update_jump_target(opnum_jump, get_next_op_number());
  }
  /* }}} */
  
  static inline zend_op *zend_delayed_emit_op(znode *result, zend_uchar opcode, znode *op1, znode *op2) /* {{{ */
  {
  	zend_op tmp_opline;
  
  	init_op(&tmp_opline);
  
  	tmp_opline.opcode = opcode;
  	if (op1 != NULL) {
  		SET_NODE(tmp_opline.op1, op1);
  	}
  	if (op2 != NULL) {
  		SET_NODE(tmp_opline.op2, op2);
  	}
  	if (result) {
  		zend_make_var_result(result, &tmp_opline);
  	}
  
  	zend_stack_push(&CG(delayed_oplines_stack), &tmp_opline);
  	return zend_stack_top(&CG(delayed_oplines_stack));
  }
  /* }}} */
  
  static inline uint32_t zend_delayed_compile_begin(void) /* {{{ */
  {
  	return zend_stack_count(&CG(delayed_oplines_stack));
  }
  /* }}} */
  
  static zend_op *zend_delayed_compile_end(uint32_t offset) /* {{{ */
  {
  	zend_op *opline = NULL, *oplines = zend_stack_base(&CG(delayed_oplines_stack));
  	uint32_t i, count = zend_stack_count(&CG(delayed_oplines_stack));
  
  	ZEND_ASSERT(count >= offset);
  	for (i = offset; i < count; ++i) {
  		opline = get_next_op();
  		memcpy(opline, &oplines[i], sizeof(zend_op));
  	}
  	CG(delayed_oplines_stack).top = offset;
  	return opline;
  }
  /* }}} */
  
  #define ZEND_MEMOIZE_NONE 0
  #define ZEND_MEMOIZE_COMPILE 1
  #define ZEND_MEMOIZE_FETCH 2
  
  static void zend_compile_memoized_expr(znode *result, zend_ast *expr) /* {{{ */
  {
  	int memoize_mode = CG(memoize_mode);
  	if (memoize_mode == ZEND_MEMOIZE_COMPILE) {
  		znode memoized_result;
  
  		/* Go through normal compilation */
  		CG(memoize_mode) = ZEND_MEMOIZE_NONE;
  		zend_compile_expr(result, expr);
  		CG(memoize_mode) = ZEND_MEMOIZE_COMPILE;
  
  		if (result->op_type == IS_VAR) {
  			zend_emit_op(&memoized_result, ZEND_COPY_TMP, result, NULL);
  		} else if (result->op_type == IS_TMP_VAR) {
  			zend_emit_op_tmp(&memoized_result, ZEND_COPY_TMP, result, NULL);
  		} else {
  			memoized_result = *result;
  		}
  
  		zend_hash_index_update_mem(
  			CG(memoized_exprs), (uintptr_t) expr, &memoized_result, sizeof(znode));
  	} else if (memoize_mode == ZEND_MEMOIZE_FETCH) {
  		znode *memoized_result = zend_hash_index_find_ptr(CG(memoized_exprs), (uintptr_t) expr);
  		*result = *memoized_result;
  		if (result->op_type == IS_CONST) {
  			Z_TRY_ADDREF(result->u.constant);
  		}
  	} else {
  		ZEND_ASSERT(0);
  	}
  }
  /* }}} */
  
  static void zend_emit_return_type_check(
  		znode *expr, zend_arg_info *return_info, zend_bool implicit) /* {{{ */
  {
  	if (ZEND_TYPE_IS_SET(return_info->type)) {
  		zend_op *opline;
  
  		/* `return ...;` is illegal in a void function (but `return;` isn't) */
  		if (ZEND_TYPE_CODE(return_info->type) == IS_VOID) {
  			if (expr) {
  				if (expr->op_type == IS_CONST && Z_TYPE(expr->u.constant) == IS_NULL) {
  					zend_error_noreturn(E_COMPILE_ERROR,
  						"A void function must not return a value "
  						"(did you mean \"return;\" instead of \"return null;\"?)");
  				} else {
  					zend_error_noreturn(E_COMPILE_ERROR, "A void function must not return a value");
  				}
  			}
  			/* we don't need run-time check */
  			return;
  		}
  
  		if (!expr && !implicit) {
  			if (ZEND_TYPE_ALLOW_NULL(return_info->type)) {
  				zend_error_noreturn(E_COMPILE_ERROR,
  					"A function with return type must return a value "
  					"(did you mean \"return null;\" instead of \"return;\"?)");
  			} else {
  				zend_error_noreturn(E_COMPILE_ERROR,
  					"A function with return type must return a value");
  			}
  		}
  
  		if (expr && expr->op_type == IS_CONST) {
  			if ((ZEND_TYPE_CODE(return_info->type) == Z_TYPE(expr->u.constant))
  			 ||((ZEND_TYPE_CODE(return_info->type) == _IS_BOOL)
  			  && (Z_TYPE(expr->u.constant) == IS_FALSE
  			   || Z_TYPE(expr->u.constant) == IS_TRUE))
  			 || (ZEND_TYPE_ALLOW_NULL(return_info->type)
  			  && Z_TYPE(expr->u.constant) == IS_NULL)) {
  				/* we don't need run-time check */
  				return;
  			}
  		}
  
  		opline = zend_emit_op(NULL, ZEND_VERIFY_RETURN_TYPE, expr, NULL);
  		if (expr && expr->op_type == IS_CONST) {
  			opline->result_type = expr->op_type = IS_TMP_VAR;
  			opline->result.var = expr->u.op.var = get_temporary_variable();
  		}
  		if (ZEND_TYPE_IS_CLASS(return_info->type)) {
  			opline->op2.num = CG(active_op_array)->cache_size;
  			CG(active_op_array)->cache_size += sizeof(void*);
  		} else {
  			opline->op2.num = -1;
  		}
  	}
  }
  /* }}} */
  
  void zend_emit_final_return(int return_one) /* {{{ */
  {
  	znode zn;
  	zend_op *ret;
  	zend_bool returns_reference = (CG(active_op_array)->fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0;
  
  	if (CG(active_op_array)->fn_flags & ZEND_ACC_HAS_RETURN_TYPE
  			&& !(CG(active_op_array)->fn_flags & ZEND_ACC_GENERATOR)) {
  		zend_emit_return_type_check(NULL, CG(active_op_array)->arg_info - 1, 1);
  	}
  
  	zn.op_type = IS_CONST;
  	if (return_one) {
  		ZVAL_LONG(&zn.u.constant, 1);
  	} else {
  		ZVAL_NULL(&zn.u.constant);
  	}
  
  	ret = zend_emit_op(NULL, returns_reference ? ZEND_RETURN_BY_REF : ZEND_RETURN, &zn, NULL);
  	ret->extended_value = -1;
  }
  /* }}} */
  
  static inline zend_bool zend_is_variable(zend_ast *ast) /* {{{ */
  {
  	return ast->kind == ZEND_AST_VAR || ast->kind == ZEND_AST_DIM
  		|| ast->kind == ZEND_AST_PROP || ast->kind == ZEND_AST_STATIC_PROP;
  }
  /* }}} */
  
  static inline zend_bool zend_is_call(zend_ast *ast) /* {{{ */
  {
  	return ast->kind == ZEND_AST_CALL
  		|| ast->kind == ZEND_AST_METHOD_CALL
  		|| ast->kind == ZEND_AST_STATIC_CALL;
  }
  /* }}} */
  
  static inline zend_bool zend_is_variable_or_call(zend_ast *ast) /* {{{ */
  {
  	return zend_is_variable(ast) || zend_is_call(ast);
  }
  /* }}} */
  
  static inline zend_bool zend_is_unticked_stmt(zend_ast *ast) /* {{{ */
  {
  	return ast->kind == ZEND_AST_STMT_LIST || ast->kind == ZEND_AST_LABEL
  		|| ast->kind == ZEND_AST_PROP_DECL || ast->kind == ZEND_AST_CLASS_CONST_DECL
  		|| ast->kind == ZEND_AST_USE_TRAIT || ast->kind == ZEND_AST_METHOD;
  }
  /* }}} */
  
  static inline zend_bool zend_can_write_to_variable(zend_ast *ast) /* {{{ */
  {
  	while (ast->kind == ZEND_AST_DIM || ast->kind == ZEND_AST_PROP) {
  		ast = ast->child[0];
  	}
  
  	return zend_is_variable_or_call(ast);
  }
  /* }}} */
  
  static inline zend_bool zend_is_const_default_class_ref(zend_ast *name_ast) /* {{{ */
  {
  	if (name_ast->kind != ZEND_AST_ZVAL) {
  		return 0;
  	}
  
  	return ZEND_FETCH_CLASS_DEFAULT == zend_get_class_fetch_type_ast(name_ast);
  }
  /* }}} */
  
  static inline void zend_handle_numeric_op(znode *node) /* {{{ */
  {
  	if (node->op_type == IS_CONST && Z_TYPE(node->u.constant) == IS_STRING) {
  		zend_ulong index;
  
  		if (ZEND_HANDLE_NUMERIC(Z_STR(node->u.constant), index)) {
  			zval_ptr_dtor(&node->u.constant);
  			ZVAL_LONG(&node->u.constant, index);
  		}
  	}
  }
  /* }}} */
  
  static inline void zend_handle_numeric_dim(zend_op *opline, znode *dim_node) /* {{{ */
  {
  	if (Z_TYPE(dim_node->u.constant) == IS_STRING) {
  		zend_ulong index;
  
  		if (ZEND_HANDLE_NUMERIC(Z_STR(dim_node->u.constant), index)) {
  			/* For numeric indexes we also keep the original value to use by ArrayAccess
  			 * See bug #63217
  			 */
  			int c = zend_add_literal(&dim_node->u.constant);
  			ZEND_ASSERT(opline->op2.constant + 1 == c);
  			ZVAL_LONG(CT_CONSTANT(opline->op2), index);
  			Z_EXTRA_P(CT_CONSTANT(opline->op2)) = ZEND_EXTRA_VALUE;
  			return;
  		}
  	}
  }
  /* }}} */
  
  static inline void zend_set_class_name_op1(zend_op *opline, znode *class_node) /* {{{ */
  {
  	if (class_node->op_type == IS_CONST) {
  		opline->op1_type = IS_CONST;
  		opline->op1.constant = zend_add_class_name_literal(
  			Z_STR(class_node->u.constant));
  	} else {
  		SET_NODE(opline->op1, class_node);
  	}
  }
  /* }}} */
  
  static void zend_compile_class_ref(znode *result, zend_ast *name_ast, uint32_t fetch_flags) /* {{{ */
  {
  	uint32_t fetch_type;
  
  	if (name_ast->kind != ZEND_AST_ZVAL) {
  		znode name_node;
  
  		zend_compile_expr(&name_node, name_ast);
  
  		if (name_node.op_type == IS_CONST) {
  			zend_string *name;
  
  			if (Z_TYPE(name_node.u.constant) != IS_STRING) {
  				zend_error_noreturn(E_COMPILE_ERROR, "Illegal class name");
  			}
  
  			name = Z_STR(name_node.u.constant);
  			fetch_type = zend_get_class_fetch_type(name);
  
  			if (fetch_type == ZEND_FETCH_CLASS_DEFAULT) {
  				result->op_type = IS_CONST;
  				ZVAL_STR(&result->u.constant, zend_resolve_class_name(name, ZEND_NAME_FQ));
  			} else {
  				zend_ensure_valid_class_fetch_type(fetch_type);
  				result->op_type = IS_UNUSED;
  				result->u.op.num = fetch_type | fetch_flags;
  			}
  
  			zend_string_release_ex(name, 0);
  		} else {
  			zend_op *opline = zend_emit_op(result, ZEND_FETCH_CLASS, NULL, &name_node);
  			opline->op1.num = ZEND_FETCH_CLASS_DEFAULT | fetch_flags;
  		}
  		return;
  	}
  
  	/* Fully qualified names are always default refs */
  	if (name_ast->attr == ZEND_NAME_FQ) {
  		result->op_type = IS_CONST;
  		ZVAL_STR(&result->u.constant, zend_resolve_class_name_ast(name_ast));
  		return;
  	}
  
  	fetch_type = zend_get_class_fetch_type(zend_ast_get_str(name_ast));
  	if (ZEND_FETCH_CLASS_DEFAULT == fetch_type) {
  		result->op_type = IS_CONST;
  		ZVAL_STR(&result->u.constant, zend_resolve_class_name_ast(name_ast));
  	} else {
  		zend_ensure_valid_class_fetch_type(fetch_type);
  		result->op_type = IS_UNUSED;
  		result->u.op.num = fetch_type | fetch_flags;
  	}
  }
  /* }}} */
  
  static int zend_try_compile_cv(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *name_ast = ast->child[0];
  	if (name_ast->kind == ZEND_AST_ZVAL) {
  		zval *zv = zend_ast_get_zval(name_ast);
  		zend_string *name;
  
  		if (EXPECTED(Z_TYPE_P(zv) == IS_STRING)) {
  			name = zval_make_interned_string(zv);
  		} else {
  			name = zend_new_interned_string(zval_get_string_func(zv));
  		}
  
  		if (zend_is_auto_global(name)) {
  			return FAILURE;
  		}
  
  		result->op_type = IS_CV;
  		result->u.op.var = lookup_cv(name);
  
  		if (UNEXPECTED(Z_TYPE_P(zv) != IS_STRING)) {
  			zend_string_release_ex(name, 0);
  		}
  
  		return SUCCESS;
  	}
  
  	return FAILURE;
  }
  /* }}} */
  
  static zend_op *zend_compile_simple_var_no_cv(znode *result, zend_ast *ast, uint32_t type, int delayed) /* {{{ */
  {
  	zend_ast *name_ast = ast->child[0];
  	znode name_node;
  	zend_op *opline;
  
  	zend_compile_expr(&name_node, name_ast);
  	if (name_node.op_type == IS_CONST) {
  		convert_to_string(&name_node.u.constant);
  	}
  
  	if (delayed) {
  		opline = zend_delayed_emit_op(result, ZEND_FETCH_R, &name_node, NULL);
  	} else {
  		opline = zend_emit_op(result, ZEND_FETCH_R, &name_node, NULL);
  	}
  
  	if (name_node.op_type == IS_CONST &&
  	    zend_is_auto_global(Z_STR(name_node.u.constant))) {
  
  		opline->extended_value = ZEND_FETCH_GLOBAL;
  	} else {
  		opline->extended_value = ZEND_FETCH_LOCAL;
  	}
  
  	zend_adjust_for_fetch_type(opline, result, type);
  	return opline;
  }
  /* }}} */
  
  static zend_bool is_this_fetch(zend_ast *ast) /* {{{ */
  {
  	if (ast->kind == ZEND_AST_VAR && ast->child[0]->kind == ZEND_AST_ZVAL) {
  		zval *name = zend_ast_get_zval(ast->child[0]);
  		return Z_TYPE_P(name) == IS_STRING && zend_string_equals_literal(Z_STR_P(name), "this");
  	}
  
  	return 0;
  }
  /* }}} */
  
  static zend_op *zend_compile_simple_var(znode *result, zend_ast *ast, uint32_t type, int delayed) /* {{{ */
  {
  	if (is_this_fetch(ast)) {
  		zend_op *opline = zend_emit_op(result, ZEND_FETCH_THIS, NULL, NULL);
  		if ((type == BP_VAR_R) || (type == BP_VAR_IS)) {
  			opline->result_type = IS_TMP_VAR;
  			result->op_type = IS_TMP_VAR;
  		}
  		return opline;
  	} else if (zend_try_compile_cv(result, ast) == FAILURE) {
  		return zend_compile_simple_var_no_cv(result, ast, type, delayed);
  	}
  	return NULL;
  }
  /* }}} */
  
  static void zend_separate_if_call_and_write(znode *node, zend_ast *ast, uint32_t type) /* {{{ */
  {
  	if (type != BP_VAR_R && type != BP_VAR_IS && zend_is_call(ast)) {
  		if (node->op_type == IS_VAR) {
  			zend_op *opline = zend_emit_op(NULL, ZEND_SEPARATE, node, NULL);
  			opline->result_type = IS_VAR;
  			opline->result.var = opline->op1.var;
  		} else {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use result of built-in function in write context");
  		}
  	}
  }
  /* }}} */
  
  zend_op *zend_delayed_compile_var(znode *result, zend_ast *ast, uint32_t type, zend_bool by_ref);
  void zend_compile_assign(znode *result, zend_ast *ast);
  
  static inline void zend_emit_assign_znode(zend_ast *var_ast, znode *value_node) /* {{{ */
  {
  	znode dummy_node;
  	zend_ast *assign_ast = zend_ast_create(ZEND_AST_ASSIGN, var_ast,
  		zend_ast_create_znode(value_node));
  	zend_compile_assign(&dummy_node, assign_ast);
  	zend_do_free(&dummy_node);
  }
  /* }}} */
  
  static zend_op *zend_delayed_compile_dim(znode *result, zend_ast *ast, uint32_t type) /* {{{ */
  {
  	zend_ast *var_ast = ast->child[0];
  	zend_ast *dim_ast = ast->child[1];
  	zend_op *opline;
  
  	znode var_node, dim_node;
  
  	opline = zend_delayed_compile_var(&var_node, var_ast, type, 0);
  	if (opline && type == BP_VAR_W && (opline->opcode == ZEND_FETCH_STATIC_PROP_W || opline->opcode == ZEND_FETCH_OBJ_W)) {
  		opline->extended_value |= ZEND_FETCH_DIM_WRITE;
  	}
  
  	zend_separate_if_call_and_write(&var_node, var_ast, type);
  
  	if (dim_ast == NULL) {
  		if (type == BP_VAR_R || type == BP_VAR_IS) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use [] for reading");
  		}
  		if (type == BP_VAR_UNSET) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use [] for unsetting");
  		}
  		dim_node.op_type = IS_UNUSED;
  	} else {
  		zend_compile_expr(&dim_node, dim_ast);
  	}
  
  	opline = zend_delayed_emit_op(result, ZEND_FETCH_DIM_R, &var_node, &dim_node);
  	zend_adjust_for_fetch_type(opline, result, type);
  
  	if (dim_node.op_type == IS_CONST) {
  		zend_handle_numeric_dim(opline, &dim_node);
  	}
  	return opline;
  }
  /* }}} */
  
  static zend_op *zend_compile_dim(znode *result, zend_ast *ast, uint32_t type) /* {{{ */
  {
  	uint32_t offset = zend_delayed_compile_begin();
  	zend_delayed_compile_dim(result, ast, type);
  	return zend_delayed_compile_end(offset);
  }
  /* }}} */
  
  static zend_op *zend_delayed_compile_prop(znode *result, zend_ast *ast, uint32_t type) /* {{{ */
  {
  	zend_ast *obj_ast = ast->child[0];
  	zend_ast *prop_ast = ast->child[1];
  
  	znode obj_node, prop_node;
  	zend_op *opline;
  
  	if (is_this_fetch(obj_ast)) {
  		obj_node.op_type = IS_UNUSED;
  	} else {
  		opline = zend_delayed_compile_var(&obj_node, obj_ast, type, 0);
  		if (opline && type == BP_VAR_W && (opline->opcode == ZEND_FETCH_STATIC_PROP_W || opline->opcode == ZEND_FETCH_OBJ_W)) {
  			opline->extended_value |= ZEND_FETCH_OBJ_WRITE;
  		}
  
  		zend_separate_if_call_and_write(&obj_node, obj_ast, type);
  	}
  	zend_compile_expr(&prop_node, prop_ast);
  
  	opline = zend_delayed_emit_op(result, ZEND_FETCH_OBJ_R, &obj_node, &prop_node);
  	if (opline->op2_type == IS_CONST) {
  		convert_to_string(CT_CONSTANT(opline->op2));
  		opline->extended_value = zend_alloc_cache_slots(3);
  	}
  
  	zend_adjust_for_fetch_type(opline, result, type);
  	return opline;
  }
  /* }}} */
  
  static zend_op *zend_compile_prop(znode *result, zend_ast *ast, uint32_t type, int by_ref) /* {{{ */
  {
  	uint32_t offset = zend_delayed_compile_begin();
  	zend_op *opline = zend_delayed_compile_prop(result, ast, type);
  	if (by_ref) { /* shared with cache_slot */
  		opline->extended_value |= ZEND_FETCH_REF;
  	}
  	return zend_delayed_compile_end(offset);
  }
  /* }}} */
  
  zend_op *zend_compile_static_prop(znode *result, zend_ast *ast, uint32_t type, int by_ref, int delayed) /* {{{ */
  {
  	zend_ast *class_ast = ast->child[0];
  	zend_ast *prop_ast = ast->child[1];
  
  	znode class_node, prop_node;
  	zend_op *opline;
  
  	zend_compile_class_ref(&class_node, class_ast, ZEND_FETCH_CLASS_EXCEPTION);
  
  	zend_compile_expr(&prop_node, prop_ast);
  
  	if (delayed) {
  		opline = zend_delayed_emit_op(result, ZEND_FETCH_STATIC_PROP_R, &prop_node, NULL);
  	} else {
  		opline = zend_emit_op(result, ZEND_FETCH_STATIC_PROP_R, &prop_node, NULL);
  	}
  	if (opline->op1_type == IS_CONST) {
  		convert_to_string(CT_CONSTANT(opline->op1));
  		opline->extended_value = zend_alloc_cache_slots(3);
  	}
  	if (class_node.op_type == IS_CONST) {
  		opline->op2_type = IS_CONST;
  		opline->op2.constant = zend_add_class_name_literal(
  			Z_STR(class_node.u.constant));
  		if (opline->op1_type != IS_CONST) {
  			opline->extended_value = zend_alloc_cache_slot();
  		}
  	} else {
  		SET_NODE(opline->op2, &class_node);
  	}
  
  	if (by_ref && (type == BP_VAR_W || type == BP_VAR_FUNC_ARG)) { /* shared with cache_slot */
  		opline->extended_value |= ZEND_FETCH_REF;
  	}
  
  	zend_adjust_for_fetch_type(opline, result, type);
  	return opline;
  }
  /* }}} */
  
  static void zend_verify_list_assign_target(zend_ast *var_ast, zend_bool old_style) /* {{{ */ {
  	if (var_ast->kind == ZEND_AST_ARRAY) {
  		if (var_ast->attr == ZEND_ARRAY_SYNTAX_LONG) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot assign to array(), use [] instead");
  		}
  		if (old_style != var_ast->attr) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot mix [] and list()");
  		}
  	} else if (!zend_can_write_to_variable(var_ast)) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Assignments can only happen to writable values");
  	}
  }
  /* }}} */
  
  static inline void zend_emit_assign_ref_znode(zend_ast *var_ast, znode *value_node);
  
  /* Propagate refs used on leaf elements to the surrounding list() structures. */
  static zend_bool zend_propagate_list_refs(zend_ast *ast) { /* {{{ */
  	zend_ast_list *list = zend_ast_get_list(ast);
  	zend_bool has_refs = 0;
  	uint32_t i;
  
  	for (i = 0; i < list->children; ++i) {
  		zend_ast *elem_ast = list->child[i];
  
  		if (elem_ast) {
  			zend_ast *var_ast = elem_ast->child[0];
  			if (var_ast->kind == ZEND_AST_ARRAY) {
  				elem_ast->attr = zend_propagate_list_refs(var_ast);
  			}
  			has_refs |= elem_ast->attr;
  		}
  	}
  
  	return has_refs;
  }
  /* }}} */
  
  static void zend_compile_list_assign(
  		znode *result, zend_ast *ast, znode *expr_node, zend_bool old_style) /* {{{ */
  {
  	zend_ast_list *list = zend_ast_get_list(ast);
  	uint32_t i;
  	zend_bool has_elems = 0;
  	zend_bool is_keyed =
  		list->children > 0 && list->child[0] != NULL && list->child[0]->child[1] != NULL;
  
  	if (list->children && expr_node->op_type == IS_CONST && Z_TYPE(expr_node->u.constant) == IS_STRING) {
  		zval_make_interned_string(&expr_node->u.constant);
  	}
  
  	for (i = 0; i < list->children; ++i) {
  		zend_ast *elem_ast = list->child[i];
  		zend_ast *var_ast, *key_ast;
  		znode fetch_result, dim_node;
  		zend_op *opline;
  
  		if (elem_ast == NULL) {
  			if (is_keyed) {
  				zend_error(E_COMPILE_ERROR,
  					"Cannot use empty array entries in keyed array assignment");
  			} else {
  				continue;
  			}
  		}
  
  		var_ast = elem_ast->child[0];
  		key_ast = elem_ast->child[1];
  		has_elems = 1;
  
  		if (is_keyed) {
  			if (key_ast == NULL) {
  				zend_error(E_COMPILE_ERROR,
  					"Cannot mix keyed and unkeyed array entries in assignments");
  			}
  
  			zend_compile_expr(&dim_node, key_ast);
  		} else {
  			if (key_ast != NULL) {
  				zend_error(E_COMPILE_ERROR,
  					"Cannot mix keyed and unkeyed array entries in assignments");
  			}
  
  			dim_node.op_type = IS_CONST;
  			ZVAL_LONG(&dim_node.u.constant, i);
  		}
  
  		if (expr_node->op_type == IS_CONST) {
  			Z_TRY_ADDREF(expr_node->u.constant);
  		}
  
  		zend_verify_list_assign_target(var_ast, old_style);
  
  		opline = zend_emit_op(&fetch_result,
  			elem_ast->attr ? (expr_node->op_type == IS_CV ? ZEND_FETCH_DIM_W : ZEND_FETCH_LIST_W) : ZEND_FETCH_LIST_R, expr_node, &dim_node);
  
  		if (dim_node.op_type == IS_CONST) {
  			zend_handle_numeric_dim(opline, &dim_node);
  		}
  
  		if (var_ast->kind == ZEND_AST_ARRAY) {
  			if (elem_ast->attr) {
  				zend_emit_op(&fetch_result, ZEND_MAKE_REF, &fetch_result, NULL);
  			}
  			zend_compile_list_assign(NULL, var_ast, &fetch_result, var_ast->attr);
  		} else if (elem_ast->attr) {
  			zend_emit_assign_ref_znode(var_ast, &fetch_result);
  		} else {
  			zend_emit_assign_znode(var_ast, &fetch_result);
  		}
  	}
  
  	if (has_elems == 0) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot use empty list");
  	}
  
  	if (result) {
  		*result = *expr_node;
  	} else {
  		zend_do_free(expr_node);
  	}
  }
  /* }}} */
  
  static void zend_ensure_writable_variable(const zend_ast *ast) /* {{{ */
  {
  	if (ast->kind == ZEND_AST_CALL) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Can't use function return value in write context");
  	}
  	if (ast->kind == ZEND_AST_METHOD_CALL || ast->kind == ZEND_AST_STATIC_CALL) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Can't use method return value in write context");
  	}
  }
  /* }}} */
  
  /* Detects $a... = $a pattern */
  zend_bool zend_is_assign_to_self(zend_ast *var_ast, zend_ast *expr_ast) /* {{{ */
  {
  	if (expr_ast->kind != ZEND_AST_VAR || expr_ast->child[0]->kind != ZEND_AST_ZVAL) {
  		return 0;
  	}
  
  	while (zend_is_variable(var_ast) && var_ast->kind != ZEND_AST_VAR) {
  		var_ast = var_ast->child[0];
  	}
  
  	if (var_ast->kind != ZEND_AST_VAR || var_ast->child[0]->kind != ZEND_AST_ZVAL) {
  		return 0;
  	}
  
  	{
  		zend_string *name1 = zval_get_string(zend_ast_get_zval(var_ast->child[0]));
  		zend_string *name2 = zval_get_string(zend_ast_get_zval(expr_ast->child[0]));
  		zend_bool result = zend_string_equals(name1, name2);
  		zend_string_release_ex(name1, 0);
  		zend_string_release_ex(name2, 0);
  		return result;
  	}
  }
  /* }}} */
  
  /* Detects if list($a, $b, $c) contains variable with given name */
  zend_bool zend_list_has_assign_to(zend_ast *list_ast, zend_string *name) /* {{{ */
  {
  	zend_ast_list *list = zend_ast_get_list(list_ast);
  	uint32_t i;
  	for (i = 0; i < list->children; i++) {
  		zend_ast *elem_ast = list->child[i];
  		zend_ast *var_ast;
  
  		if (!elem_ast) {
  			continue;
  		}
  		var_ast = elem_ast->child[0];
  
  		/* Recursively check nested list()s */
  		if (var_ast->kind == ZEND_AST_ARRAY && zend_list_has_assign_to(var_ast, name)) {
  			return 1;
  		}
  
  		if (var_ast->kind == ZEND_AST_VAR && var_ast->child[0]->kind == ZEND_AST_ZVAL) {
  			zend_string *var_name = zval_get_string(zend_ast_get_zval(var_ast->child[0]));
  			zend_bool result = zend_string_equals(var_name, name);
  			zend_string_release_ex(var_name, 0);
  			if (result) {
  				return 1;
  			}
  		}
  	}
  
  	return 0;
  }
  /* }}} */
  
  /* Detects patterns like list($a, $b, $c) = $a */
  zend_bool zend_list_has_assign_to_self(zend_ast *list_ast, zend_ast *expr_ast) /* {{{ */
  {
  	/* Only check simple variables on the RHS, as only CVs cause issues with this. */
  	if (expr_ast->kind == ZEND_AST_VAR && expr_ast->child[0]->kind == ZEND_AST_ZVAL) {
  		zend_string *name = zval_get_string(zend_ast_get_zval(expr_ast->child[0]));
  		zend_bool result = zend_list_has_assign_to(list_ast, name);
  		zend_string_release_ex(name, 0);
  		return result;
  	}
  	return 0;
  }
  /* }}} */
  
  void zend_compile_assign(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *var_ast = ast->child[0];
  	zend_ast *expr_ast = ast->child[1];
  
  	znode var_node, expr_node;
  	zend_op *opline;
  	uint32_t offset;
  
  	if (is_this_fetch(var_ast)) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this");
  	}
  
  	zend_ensure_writable_variable(var_ast);
  
  	switch (var_ast->kind) {
  		case ZEND_AST_VAR:
  			offset = zend_delayed_compile_begin();
  			zend_delayed_compile_var(&var_node, var_ast, BP_VAR_W, 0);
  			zend_compile_expr(&expr_node, expr_ast);
  			zend_delayed_compile_end(offset);
  			zend_emit_op(result, ZEND_ASSIGN, &var_node, &expr_node);
  			return;
  		case ZEND_AST_STATIC_PROP:
  			offset = zend_delayed_compile_begin();
  			zend_delayed_compile_var(result, var_ast, BP_VAR_W, 0);
  			zend_compile_expr(&expr_node, expr_ast);
  
  			opline = zend_delayed_compile_end(offset);
  			opline->opcode = ZEND_ASSIGN_STATIC_PROP;
  
  			zend_emit_op_data(&expr_node);
  			return;
  		case ZEND_AST_DIM:
  			offset = zend_delayed_compile_begin();
  			zend_delayed_compile_dim(result, var_ast, BP_VAR_W);
  
  			if (zend_is_assign_to_self(var_ast, expr_ast)
  			 && !is_this_fetch(expr_ast)) {
  				/* $a[0] = $a should evaluate the right $a first */
  				znode cv_node;
  
  				if (zend_try_compile_cv(&cv_node, expr_ast) == FAILURE) {
  					zend_compile_simple_var_no_cv(&expr_node, expr_ast, BP_VAR_R, 0);
  				} else {
  					zend_emit_op(&expr_node, ZEND_QM_ASSIGN, &cv_node, NULL);
  				}
  			} else {
  				zend_compile_expr(&expr_node, expr_ast);
  			}
  
  			opline = zend_delayed_compile_end(offset);
  			opline->opcode = ZEND_ASSIGN_DIM;
  
  			opline = zend_emit_op_data(&expr_node);
  			return;
  		case ZEND_AST_PROP:
  			offset = zend_delayed_compile_begin();
  			zend_delayed_compile_prop(result, var_ast, BP_VAR_W);
  			zend_compile_expr(&expr_node, expr_ast);
  
  			opline = zend_delayed_compile_end(offset);
  			opline->opcode = ZEND_ASSIGN_OBJ;
  
  			zend_emit_op_data(&expr_node);
  			return;
  		case ZEND_AST_ARRAY:
  			if (zend_propagate_list_refs(var_ast)) {
  				if (!zend_is_variable_or_call(expr_ast)) {
  					zend_error_noreturn(E_COMPILE_ERROR,
  						"Cannot assign reference to non referencable value");
  				}
  
  				zend_compile_var(&expr_node, expr_ast, BP_VAR_W, 1);
  				/* MAKE_REF is usually not necessary for CVs. However, if there are
  				 * self-assignments, this forces the RHS to evaluate first. */
  				if (expr_node.op_type != IS_CV
  						|| zend_list_has_assign_to_self(var_ast, expr_ast)) {
  					zend_emit_op(&expr_node, ZEND_MAKE_REF, &expr_node, NULL);
  				}
  			} else {
  				if (zend_list_has_assign_to_self(var_ast, expr_ast)) {
  					/* list($a, $b) = $a should evaluate the right $a first */
  					znode cv_node;
  
  					if (zend_try_compile_cv(&cv_node, expr_ast) == FAILURE) {
  						zend_compile_simple_var_no_cv(&expr_node, expr_ast, BP_VAR_R, 0);
  					} else {
  						zend_emit_op(&expr_node, ZEND_QM_ASSIGN, &cv_node, NULL);
  					}
  				} else {
  					zend_compile_expr(&expr_node, expr_ast);
  				}
  			}
  
  			zend_compile_list_assign(result, var_ast, &expr_node, var_ast->attr);
  			return;
  		EMPTY_SWITCH_DEFAULT_CASE();
  	}
  }
  /* }}} */
  
  void zend_compile_assign_ref(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *target_ast = ast->child[0];
  	zend_ast *source_ast = ast->child[1];
  
  	znode target_node, source_node;
  	zend_op *opline;
  	uint32_t offset;
  
  	if (is_this_fetch(target_ast)) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this");
  	}
  	zend_ensure_writable_variable(target_ast);
  
  	offset = zend_delayed_compile_begin();
  	zend_delayed_compile_var(&target_node, target_ast, BP_VAR_W, 1);
  	zend_compile_var(&source_node, source_ast, BP_VAR_W, 1);
  
  	if ((target_ast->kind != ZEND_AST_VAR
  	  || target_ast->child[0]->kind != ZEND_AST_ZVAL)
  	 && source_node.op_type != IS_CV) {
  		/* Both LHS and RHS expressions may modify the same data structure,
  		 * and the modification during RHS evaluation may dangle the pointer
  		 * to the result of the LHS evaluation.
  		 * Use MAKE_REF instruction to replace direct pointer with REFERENCE.
  		 * See: Bug #71539
  		 */
  		zend_emit_op(&source_node, ZEND_MAKE_REF, &source_node, NULL);
  	}
  
  	opline = zend_delayed_compile_end(offset);
  
  	if (source_node.op_type != IS_VAR && zend_is_call(source_ast)) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot use result of built-in function in write context");
  	}
  
  	if (opline && opline->opcode == ZEND_FETCH_OBJ_W) {
  		opline->opcode = ZEND_ASSIGN_OBJ_REF;
  		opline->extended_value &= ~ZEND_FETCH_REF;
  		zend_emit_op_data(&source_node);
  		if (result != NULL) {
  			*result = target_node;
  		}
  	} else if (opline && opline->opcode == ZEND_FETCH_STATIC_PROP_W) {
  		opline->opcode = ZEND_ASSIGN_STATIC_PROP_REF;
  		opline->extended_value &= ~ZEND_FETCH_REF;
  		zend_emit_op_data(&source_node);
  		if (result != NULL) {
  			*result = target_node;
  		}
  	} else {
  		opline = zend_emit_op(result, ZEND_ASSIGN_REF, &target_node, &source_node);
  		opline->extended_value = 0;
  	}
  
  	if (zend_is_call(source_ast)) {
  		opline->extended_value |= ZEND_RETURNS_FUNCTION;
  	}
  }
  /* }}} */
  
  static inline void zend_emit_assign_ref_znode(zend_ast *var_ast, znode *value_node) /* {{{ */
  {
  	zend_ast *assign_ast = zend_ast_create(ZEND_AST_ASSIGN_REF, var_ast,
  		zend_ast_create_znode(value_node));
  	zend_compile_assign_ref(NULL, assign_ast);
  }
  /* }}} */
  
  void zend_compile_compound_assign(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *var_ast = ast->child[0];
  	zend_ast *expr_ast = ast->child[1];
  	uint32_t opcode = ast->attr;
  
  	znode var_node, expr_node;
  	zend_op *opline;
  	uint32_t offset, cache_slot;
  
  	zend_ensure_writable_variable(var_ast);
  
  	switch (var_ast->kind) {
  		case ZEND_AST_VAR:
  			offset = zend_delayed_compile_begin();
  			zend_delayed_compile_var(&var_node, var_ast, BP_VAR_RW, 0);
  			zend_compile_expr(&expr_node, expr_ast);
  			zend_delayed_compile_end(offset);
  			zend_emit_op(result, opcode, &var_node, &expr_node);
  			return;
  		case ZEND_AST_STATIC_PROP:
  			offset = zend_delayed_compile_begin();
  			zend_delayed_compile_var(result, var_ast, BP_VAR_RW, 0);
  			zend_compile_expr(&expr_node, expr_ast);
  
  			opline = zend_delayed_compile_end(offset);
  			cache_slot = opline->extended_value;
  			opline->opcode = opcode;
  			opline->extended_value = ZEND_ASSIGN_STATIC_PROP;
  
  			opline = zend_emit_op_data(&expr_node);
  			opline->extended_value = cache_slot;
  			return;
  		case ZEND_AST_DIM:
  			offset = zend_delayed_compile_begin();
  			zend_delayed_compile_dim(result, var_ast, BP_VAR_RW);
  			zend_compile_expr(&expr_node, expr_ast);
  
  			opline = zend_delayed_compile_end(offset);
  			opline->opcode = opcode;
  			opline->extended_value = ZEND_ASSIGN_DIM;
  
  			zend_emit_op_data(&expr_node);
  			return;
  		case ZEND_AST_PROP:
  			offset = zend_delayed_compile_begin();
  			zend_delayed_compile_prop(result, var_ast, BP_VAR_RW);
  			zend_compile_expr(&expr_node, expr_ast);
  
  			opline = zend_delayed_compile_end(offset);
  			cache_slot = opline->extended_value;
  			opline->opcode = opcode;
  			opline->extended_value = ZEND_ASSIGN_OBJ;
  
  			opline = zend_emit_op_data(&expr_node);
  			opline->extended_value = cache_slot;
  			return;
  		EMPTY_SWITCH_DEFAULT_CASE()
  	}
  }
  /* }}} */
  
  uint32_t zend_compile_args(zend_ast *ast, zend_function *fbc) /* {{{ */
  {
  	zend_ast_list *args = zend_ast_get_list(ast);
  	uint32_t i;
  	zend_bool uses_arg_unpack = 0;
  	uint32_t arg_count = 0; /* number of arguments not including unpacks */
  
  	for (i = 0; i < args->children; ++i) {
  		zend_ast *arg = args->child[i];
  		uint32_t arg_num = i + 1;
  
  		znode arg_node;
  		zend_op *opline;
  		zend_uchar opcode;
  
  		if (arg->kind == ZEND_AST_UNPACK) {
  			uses_arg_unpack = 1;
  			fbc = NULL;
  
  			zend_compile_expr(&arg_node, arg->child[0]);
  			opline = zend_emit_op(NULL, ZEND_SEND_UNPACK, &arg_node, NULL);
  			opline->op2.num = arg_count;
  			opline->result.var = (uint32_t)(zend_intptr_t)ZEND_CALL_ARG(NULL, arg_count);
  			continue;
  		}
  
  		if (uses_arg_unpack) {
  			zend_error_noreturn(E_COMPILE_ERROR,
  				"Cannot use positional argument after argument unpacking");
  		}
  
  		arg_count++;
  		if (zend_is_variable_or_call(arg)) {
  			if (zend_is_call(arg)) {
  				zend_compile_var(&arg_node, arg, BP_VAR_R, 0);
  				if (arg_node.op_type & (IS_CONST|IS_TMP_VAR)) {
  					/* Function call was converted into builtin instruction */
  					opcode = ZEND_SEND_VAL;
  				} else {
  					if (fbc) {
  						if (ARG_MUST_BE_SENT_BY_REF(fbc, arg_num)) {
  							opcode = ZEND_SEND_VAR_NO_REF;
  						} else if (ARG_MAY_BE_SENT_BY_REF(fbc, arg_num)) {
  							opcode = ZEND_SEND_VAL;
  						} else {
  							opcode = ZEND_SEND_VAR;
  						}
  					} else {
  						opcode = ZEND_SEND_VAR_NO_REF_EX;
  					}
  				}
  			} else if (fbc) {
  				if (ARG_SHOULD_BE_SENT_BY_REF(fbc, arg_num)) {
  					zend_compile_var(&arg_node, arg, BP_VAR_W, 1);
  					opcode = ZEND_SEND_REF;
  				} else {
  					zend_compile_var(&arg_node, arg, BP_VAR_R, 0);
  					opcode = (arg_node.op_type == IS_TMP_VAR) ? ZEND_SEND_VAL : ZEND_SEND_VAR;
  				}
  			} else {
  				do {
  					if (arg->kind == ZEND_AST_VAR) {
  						CG(zend_lineno) = zend_ast_get_lineno(ast);
  						if (is_this_fetch(arg)) {
  							zend_emit_op(&arg_node, ZEND_FETCH_THIS, NULL, NULL);
  							opcode = ZEND_SEND_VAR_EX;
  							break;
  						} else if (zend_try_compile_cv(&arg_node, arg) == SUCCESS) {
  							opcode = ZEND_SEND_VAR_EX;
  							break;
  						}
  					}
  					opline = zend_emit_op(NULL, ZEND_CHECK_FUNC_ARG, NULL, NULL);
  					opline->op2.num = arg_num;
  					zend_compile_var(&arg_node, arg, BP_VAR_FUNC_ARG, 1);
  					opcode = ZEND_SEND_FUNC_ARG;
  				} while (0);
  			}
  		} else {
  			zend_compile_expr(&arg_node, arg);
  			if (arg_node.op_type == IS_VAR) {
  				/* pass ++$a or something similar */
  				if (fbc) {
  					if (ARG_MUST_BE_SENT_BY_REF(fbc, arg_num)) {
  						opcode = ZEND_SEND_VAR_NO_REF;
  					} else if (ARG_MAY_BE_SENT_BY_REF(fbc, arg_num)) {
  						opcode = ZEND_SEND_VAL;
  					} else {
  						opcode = ZEND_SEND_VAR;
  					}
  				} else {
  					opcode = ZEND_SEND_VAR_NO_REF_EX;
  				}
  			} else if (arg_node.op_type == IS_CV) {
  				if (fbc) {
  					if (ARG_SHOULD_BE_SENT_BY_REF(fbc, arg_num)) {
  						opcode = ZEND_SEND_REF;
  					} else {
  						opcode = ZEND_SEND_VAR;
  					}
  				} else {
  					opcode = ZEND_SEND_VAR_EX;
  				}
  			} else {
  				if (fbc) {
  					opcode = ZEND_SEND_VAL;
  					if (ARG_MUST_BE_SENT_BY_REF(fbc, arg_num)) {
  						zend_error_noreturn(E_COMPILE_ERROR, "Only variables can be passed by reference");
  					}
  				} else {
  					opcode = ZEND_SEND_VAL_EX;
  				}
  			}
  		}
  
  		opline = zend_emit_op(NULL, opcode, &arg_node, NULL);
  		opline->op2.opline_num = arg_num;
  		opline->result.var = (uint32_t)(zend_intptr_t)ZEND_CALL_ARG(NULL, arg_num);
  	}
  
  	return arg_count;
  }
  /* }}} */
  
  ZEND_API zend_uchar zend_get_call_op(const zend_op *init_op, zend_function *fbc) /* {{{ */
  {
  	if (fbc) {
  		if (fbc->type == ZEND_INTERNAL_FUNCTION && !(CG(compiler_options) & ZEND_COMPILE_IGNORE_INTERNAL_FUNCTIONS)) {
  			if (init_op->opcode == ZEND_INIT_FCALL && !zend_execute_internal) {
  				if (!(fbc->common.fn_flags & (ZEND_ACC_ABSTRACT|ZEND_ACC_DEPRECATED|ZEND_ACC_HAS_TYPE_HINTS|ZEND_ACC_RETURN_REFERENCE))) {
  					return ZEND_DO_ICALL;
  				} else {
  					return ZEND_DO_FCALL_BY_NAME;
  				}
  			}
  		} else if (!(CG(compiler_options) & ZEND_COMPILE_IGNORE_USER_FUNCTIONS)){
  			if (zend_execute_ex == execute_ex && !(fbc->common.fn_flags & ZEND_ACC_ABSTRACT)) {
  				return ZEND_DO_UCALL;
  			}
  		}
  	} else if (zend_execute_ex == execute_ex &&
  	           !zend_execute_internal &&
  	           (init_op->opcode == ZEND_INIT_FCALL_BY_NAME ||
  	            init_op->opcode == ZEND_INIT_NS_FCALL_BY_NAME)) {
  		return ZEND_DO_FCALL_BY_NAME;
  	}
  	return ZEND_DO_FCALL;
  }
  /* }}} */
  
  void zend_compile_call_common(znode *result, zend_ast *args_ast, zend_function *fbc) /* {{{ */
  {
  	zend_op *opline;
  	uint32_t opnum_init = get_next_op_number() - 1;
  	uint32_t arg_count;
  	uint32_t call_flags;
  
  	arg_count = zend_compile_args(args_ast, fbc);
  
  	zend_do_extended_fcall_begin();
  
  	opline = &CG(active_op_array)->opcodes[opnum_init];
  	opline->extended_value = arg_count;
  
  	if (opline->opcode == ZEND_INIT_FCALL) {
  		opline->op1.num = zend_vm_calc_used_stack(arg_count, fbc);
  	}
  
  	call_flags = (opline->opcode == ZEND_NEW ? ZEND_CALL_CTOR : 0);
  	opline = zend_emit_op(result, zend_get_call_op(opline, fbc), NULL, NULL);
  	opline->op1.num = call_flags;
  
  	zend_do_extended_fcall_end();
  }
  /* }}} */
  
  zend_bool zend_compile_function_name(znode *name_node, zend_ast *name_ast) /* {{{ */
  {
  	zend_string *orig_name = zend_ast_get_str(name_ast);
  	zend_bool is_fully_qualified;
  
  	name_node->op_type = IS_CONST;
  	ZVAL_STR(&name_node->u.constant, zend_resolve_function_name(
  		orig_name, name_ast->attr, &is_fully_qualified));
  
  	return !is_fully_qualified && FC(current_namespace);
  }
  /* }}} */
  
  void zend_compile_ns_call(znode *result, znode *name_node, zend_ast *args_ast) /* {{{ */
  {
  	zend_op *opline = get_next_op();
  	opline->opcode = ZEND_INIT_NS_FCALL_BY_NAME;
  	opline->op2_type = IS_CONST;
  	opline->op2.constant = zend_add_ns_func_name_literal(
  		Z_STR(name_node->u.constant));
  	opline->result.num = zend_alloc_cache_slot();
  
  	zend_compile_call_common(result, args_ast, NULL);
  }
  /* }}} */
  
  void zend_compile_dynamic_call(znode *result, znode *name_node, zend_ast *args_ast) /* {{{ */
  {
  	if (name_node->op_type == IS_CONST && Z_TYPE(name_node->u.constant) == IS_STRING) {
  		const char *colon;
  		zend_string *str = Z_STR(name_node->u.constant);
  		if ((colon = zend_memrchr(ZSTR_VAL(str), ':', ZSTR_LEN(str))) != NULL && colon > ZSTR_VAL(str) && *(colon - 1) == ':') {
  			zend_string *class = zend_string_init(ZSTR_VAL(str), colon - ZSTR_VAL(str) - 1, 0);
  			zend_string *method = zend_string_init(colon + 1, ZSTR_LEN(str) - (colon - ZSTR_VAL(str)) - 1, 0);
  			zend_op *opline = get_next_op();
  
  			opline->opcode = ZEND_INIT_STATIC_METHOD_CALL;
  			opline->op1_type = IS_CONST;
  			opline->op1.constant = zend_add_class_name_literal(class);
  			opline->op2_type = IS_CONST;
  			opline->op2.constant = zend_add_func_name_literal(method);
  			/* 2 slots, for class and method */
  			opline->result.num = zend_alloc_cache_slots(2);
  			zval_ptr_dtor(&name_node->u.constant);
  		} else {
  			zend_op *opline = get_next_op();
  
  			opline->opcode = ZEND_INIT_FCALL_BY_NAME;
  			opline->op2_type = IS_CONST;
  			opline->op2.constant = zend_add_func_name_literal(str);
  			opline->result.num = zend_alloc_cache_slot();
  		}
  	} else {
  		zend_emit_op(NULL, ZEND_INIT_DYNAMIC_CALL, NULL, name_node);
  	}
  
  	zend_compile_call_common(result, args_ast, NULL);
  }
  /* }}} */
  
  static inline zend_bool zend_args_contain_unpack(zend_ast_list *args) /* {{{ */
  {
  	uint32_t i;
  	for (i = 0; i < args->children; ++i) {
  		if (args->child[i]->kind == ZEND_AST_UNPACK) {
  			return 1;
  		}
  	}
  	return 0;
  }
  /* }}} */
  
  int zend_compile_func_strlen(znode *result, zend_ast_list *args) /* {{{ */
  {
  	znode arg_node;
  
  	if (args->children != 1) {
  		return FAILURE;
  	}
  
  	zend_compile_expr(&arg_node, args->child[0]);
  	if (arg_node.op_type == IS_CONST && Z_TYPE(arg_node.u.constant) == IS_STRING) {
  		result->op_type = IS_CONST;
  		ZVAL_LONG(&result->u.constant, Z_STRLEN(arg_node.u.constant));
  		zval_ptr_dtor_str(&arg_node.u.constant);
  	} else {
  		zend_emit_op_tmp(result, ZEND_STRLEN, &arg_node, NULL);
  	}
  	return SUCCESS;
  }
  /* }}} */
  
  int zend_compile_func_typecheck(znode *result, zend_ast_list *args, uint32_t type) /* {{{ */
  {
  	znode arg_node;
  	zend_op *opline;
  
  	if (args->children != 1) {
  		return FAILURE;
  	}
  
  	zend_compile_expr(&arg_node, args->child[0]);
  	opline = zend_emit_op_tmp(result, ZEND_TYPE_CHECK, &arg_node, NULL);
  	if (type != _IS_BOOL) {
  		opline->extended_value = (1 << type);
  	} else {
  		opline->extended_value = (1 << IS_FALSE) | (1 << IS_TRUE);
  	}
  	return SUCCESS;
  }
  /* }}} */
  
  int zend_compile_func_cast(znode *result, zend_ast_list *args, uint32_t type) /* {{{ */
  {
  	znode arg_node;
  	zend_op *opline;
  
  	if (args->children != 1) {
  		return FAILURE;
  	}
  
  	zend_compile_expr(&arg_node, args->child[0]);
  	opline = zend_emit_op_tmp(result, ZEND_CAST, &arg_node, NULL);
  	opline->extended_value = type;
  	return SUCCESS;
  }
  /* }}} */
  
  int zend_compile_func_defined(znode *result, zend_ast_list *args) /* {{{ */
  {
  	zend_string *name;
  	zend_op *opline;
  
  	if (args->children != 1 || args->child[0]->kind != ZEND_AST_ZVAL) {
  		return FAILURE;
  	}
  
  	name = zval_get_string(zend_ast_get_zval(args->child[0]));
  	if (zend_memrchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name)) || zend_memrchr(ZSTR_VAL(name), ':', ZSTR_LEN(name))) {
  		zend_string_release_ex(name, 0);
  		return FAILURE;
  	}
  
  	if (zend_try_ct_eval_const(&result->u.constant, name, 0)) {
  		zend_string_release_ex(name, 0);
  		zval_ptr_dtor(&result->u.constant);
  		ZVAL_TRUE(&result->u.constant);
  		result->op_type = IS_CONST;
  		return SUCCESS;
  	}
  
  	opline = zend_emit_op_tmp(result, ZEND_DEFINED, NULL, NULL);
  	opline->op1_type = IS_CONST;
  	LITERAL_STR(opline->op1, name);
  	opline->extended_value = zend_alloc_cache_slot();
  
  	return SUCCESS;
  }
  /* }}} */
  
  int zend_compile_func_chr(znode *result, zend_ast_list *args) /* {{{ */
  {
  
  	if (args->children == 1 &&
  	    args->child[0]->kind == ZEND_AST_ZVAL &&
  	    Z_TYPE_P(zend_ast_get_zval(args->child[0])) == IS_LONG) {
  
  		zend_long c = Z_LVAL_P(zend_ast_get_zval(args->child[0])) & 0xff;
  
  		result->op_type = IS_CONST;
  		ZVAL_INTERNED_STR(&result->u.constant, ZSTR_CHAR(c));
  		return SUCCESS;
  	} else {
  		return FAILURE;
  	}
  }
  /* }}} */
  
  int zend_compile_func_ord(znode *result, zend_ast_list *args) /* {{{ */
  {
  	if (args->children == 1 &&
  	    args->child[0]->kind == ZEND_AST_ZVAL &&
  	    Z_TYPE_P(zend_ast_get_zval(args->child[0])) == IS_STRING) {
  
  		result->op_type = IS_CONST;
  		ZVAL_LONG(&result->u.constant, (unsigned char)Z_STRVAL_P(zend_ast_get_zval(args->child[0]))[0]);
  		return SUCCESS;
  	} else {
  		return FAILURE;
  	}
  }
  /* }}} */
  
  
  static int zend_try_compile_ct_bound_init_user_func(zend_ast *name_ast, uint32_t num_args) /* {{{ */
  {
  	zend_string *name, *lcname;
  	zend_function *fbc;
  	zend_op *opline;
  
  	if (name_ast->kind != ZEND_AST_ZVAL || Z_TYPE_P(zend_ast_get_zval(name_ast)) != IS_STRING) {
  		return FAILURE;
  	}
  
  	name = zend_ast_get_str(name_ast);
  	lcname = zend_string_tolower(name);
  
  	fbc = zend_hash_find_ptr(CG(function_table), lcname);
  	if (!fbc
  		/* Don't use INIT_FCALL for recursive calls */
  	 || (fbc == (zend_function*)CG(active_op_array))
  	 || (fbc->type == ZEND_INTERNAL_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_INTERNAL_FUNCTIONS))
  	 || (fbc->type == ZEND_USER_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_USER_FUNCTIONS))
  	 || (fbc->type == ZEND_USER_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_OTHER_FILES) && fbc->op_array.filename != CG(active_op_array)->filename)
  	) {
  		zend_string_release_ex(lcname, 0);
  		return FAILURE;
  	}
  
  	opline = zend_emit_op(NULL, ZEND_INIT_FCALL, NULL, NULL);
  	opline->extended_value = num_args;
  	opline->op1.num = zend_vm_calc_used_stack(num_args, fbc);
  	opline->op2_type = IS_CONST;
  	LITERAL_STR(opline->op2, lcname);
  	opline->result.num = zend_alloc_cache_slot();
  
  	return SUCCESS;
  }
  /* }}} */
  
  static void zend_compile_init_user_func(zend_ast *name_ast, uint32_t num_args, zend_string *orig_func_name) /* {{{ */
  {
  	zend_op *opline;
  	znode name_node;
  
  	if (zend_try_compile_ct_bound_init_user_func(name_ast, num_args) == SUCCESS) {
  		return;
  	}
  
  	zend_compile_expr(&name_node, name_ast);
  
  	opline = zend_emit_op(NULL, ZEND_INIT_USER_CALL, NULL, &name_node);
  	opline->op1_type = IS_CONST;
  	LITERAL_STR(opline->op1, zend_string_copy(orig_func_name));
  	opline->extended_value = num_args;
  }
  /* }}} */
  
  /* cufa = call_user_func_array */
  int zend_compile_func_cufa(znode *result, zend_ast_list *args, zend_string *lcname) /* {{{ */
  {
  	znode arg_node;
  
  	if (args->children != 2) {
  		return FAILURE;
  	}
  
  	zend_compile_init_user_func(args->child[0], 0, lcname);
  	if (args->child[1]->kind == ZEND_AST_CALL
  	 && args->child[1]->child[0]->kind == ZEND_AST_ZVAL
  	 && Z_TYPE_P(zend_ast_get_zval(args->child[1]->child[0])) == IS_STRING
  	 && args->child[1]->child[1]->kind == ZEND_AST_ARG_LIST) {
  		zend_string *orig_name = zend_ast_get_str(args->child[1]->child[0]);
  		zend_ast_list *list = zend_ast_get_list(args->child[1]->child[1]);
  		zend_bool is_fully_qualified;
  		zend_string *name = zend_resolve_function_name(orig_name, args->child[1]->child[0]->attr, &is_fully_qualified);
  
  		if (zend_string_equals_literal_ci(name, "array_slice")
  		 && list->children == 3
  		 && list->child[1]->kind == ZEND_AST_ZVAL) {
  			zval *zv = zend_ast_get_zval(list->child[1]);
  
  			if (Z_TYPE_P(zv) == IS_LONG
  			 && Z_LVAL_P(zv) >= 0
  			 && Z_LVAL_P(zv) <= 0x7fffffff) {
  				zend_op *opline;
  				znode len_node;
  
  				zend_compile_expr(&arg_node, list->child[0]);
  				zend_compile_expr(&len_node, list->child[2]);
  				opline = zend_emit_op(NULL, ZEND_SEND_ARRAY, &arg_node, &len_node);
  				opline->extended_value = Z_LVAL_P(zv);
  				zend_emit_op(result, ZEND_DO_FCALL, NULL, NULL);
  				zend_string_release_ex(name, 0);
  				return SUCCESS;
  			}
  		}
  		zend_string_release_ex(name, 0);
  	}
  	zend_compile_expr(&arg_node, args->child[1]);
  	zend_emit_op(NULL, ZEND_SEND_ARRAY, &arg_node, NULL);
  	zend_emit_op(result, ZEND_DO_FCALL, NULL, NULL);
  
  	return SUCCESS;
  }
  /* }}} */
  
  /* cuf = call_user_func */
  int zend_compile_func_cuf(znode *result, zend_ast_list *args, zend_string *lcname) /* {{{ */
  {
  	uint32_t i;
  
  	if (args->children < 1) {
  		return FAILURE;
  	}
  
  	zend_compile_init_user_func(args->child[0], args->children - 1, lcname);
  	for (i = 1; i < args->children; ++i) {
  		zend_ast *arg_ast = args->child[i];
  		znode arg_node;
  		zend_op *opline;
  
  		zend_compile_expr(&arg_node, arg_ast);
  
  		opline = zend_emit_op(NULL, ZEND_SEND_USER, &arg_node, NULL);
  		opline->op2.num = i;
  		opline->result.var = (uint32_t)(zend_intptr_t)ZEND_CALL_ARG(NULL, i);
  	}
  	zend_emit_op(result, ZEND_DO_FCALL, NULL, NULL);
  
  	return SUCCESS;
  }
  /* }}} */
  
  static void zend_compile_assert(znode *result, zend_ast_list *args, zend_string *name, zend_function *fbc) /* {{{ */
  {
  	if (EG(assertions) >= 0) {
  		znode name_node;
  		zend_op *opline;
  		uint32_t check_op_number = get_next_op_number();
  
  		zend_emit_op(NULL, ZEND_ASSERT_CHECK, NULL, NULL);
  
  		/* Don't use INIT_FCALL for recursive calls */
  		if (fbc && fbc != (zend_function*)CG(active_op_array)) {
  			name_node.op_type = IS_CONST;
  			ZVAL_STR_COPY(&name_node.u.constant, name);
  
  			opline = zend_emit_op(NULL, ZEND_INIT_FCALL, NULL, &name_node);
  		} else {
  			opline = zend_emit_op(NULL, ZEND_INIT_NS_FCALL_BY_NAME, NULL, NULL);
  			opline->op2_type = IS_CONST;
  			opline->op2.constant = zend_add_ns_func_name_literal(name);
  		}
  		opline->result.num = zend_alloc_cache_slot();
  
  		if (args->children == 1 &&
  		    (args->child[0]->kind != ZEND_AST_ZVAL ||
  		     Z_TYPE_P(zend_ast_get_zval(args->child[0])) != IS_STRING)) {
  			/* add "assert(condition) as assertion message */
  			zend_ast_list_add((zend_ast*)args,
  				zend_ast_create_zval_from_str(
  					zend_ast_export("assert(", args->child[0], ")")));
  		}
  
  		zend_compile_call_common(result, (zend_ast*)args, fbc);
  
  		opline = &CG(active_op_array)->opcodes[check_op_number];
  		opline->op2.opline_num = get_next_op_number();
  		SET_NODE(opline->result, result);
  	} else {
  		if (!fbc) {
  			zend_string_release_ex(name, 0);
  		}
  		result->op_type = IS_CONST;
  		ZVAL_TRUE(&result->u.constant);
  	}
  }
  /* }}} */
  
  static int zend_compile_func_in_array(znode *result, zend_ast_list *args) /* {{{ */
  {
  	zend_bool strict = 0;
  	znode array, needly;
  	zend_op *opline;
  
  	if (args->children == 3) {
  		if (args->child[2]->kind == ZEND_AST_ZVAL) {
  			strict = zend_is_true(zend_ast_get_zval(args->child[2]));
  		} else if (args->child[2]->kind == ZEND_AST_CONST) {
  			zval value;
  			zend_ast *name_ast = args->child[2]->child[0];
  			zend_bool is_fully_qualified;
  			zend_string *resolved_name = zend_resolve_const_name(
  				zend_ast_get_str(name_ast), name_ast->attr, &is_fully_qualified);
  
  			if (!zend_try_ct_eval_const(&value, resolved_name, is_fully_qualified)) {
  				zend_string_release_ex(resolved_name, 0);
  				return FAILURE;
  			}
  
  			zend_string_release_ex(resolved_name, 0);
  			strict = zend_is_true(&value);
  			zval_ptr_dtor(&value);
  		} else {
  			return FAILURE;
  		}
  	} else if (args->children != 2) {
  		return FAILURE;
  	}
  
  	if (args->child[1]->kind != ZEND_AST_ARRAY
  	 || !zend_try_ct_eval_array(&array.u.constant, args->child[1])) {
  		return FAILURE;
  	}
  
  	if (zend_hash_num_elements(Z_ARRVAL(array.u.constant)) > 0) {
  		zend_bool ok = 1;
  		zval *val, tmp;
  		HashTable *src = Z_ARRVAL(array.u.constant);
  		HashTable *dst = zend_new_array(zend_hash_num_elements(src));
  
  		ZVAL_TRUE(&tmp);
  
  		if (strict) {
  			ZEND_HASH_FOREACH_VAL(src, val) {
  				if (Z_TYPE_P(val) == IS_STRING) {
  					zend_hash_add(dst, Z_STR_P(val), &tmp);
  				} else if (Z_TYPE_P(val) == IS_LONG) {
  					zend_hash_index_add(dst, Z_LVAL_P(val), &tmp);
  				} else {
  					zend_array_destroy(dst);
  					ok = 0;
  					break;
  				}
  			} ZEND_HASH_FOREACH_END();
  		} else {
  			ZEND_HASH_FOREACH_VAL(src, val) {
  				if (Z_TYPE_P(val) != IS_STRING
  				 || is_numeric_string(Z_STRVAL_P(val), Z_STRLEN_P(val), NULL, NULL, 0)) {
  					zend_array_destroy(dst);
  					ok = 0;
  					break;
  				}
  				zend_hash_add(dst, Z_STR_P(val), &tmp);
  			} ZEND_HASH_FOREACH_END();
  		}
  
  		zend_array_destroy(src);
  		if (!ok) {
  			return FAILURE;
  		}
  		Z_ARRVAL(array.u.constant) = dst;
  	}
  	array.op_type = IS_CONST;
  
  	zend_compile_expr(&needly, args->child[0]);
  
  	opline = zend_emit_op_tmp(result, ZEND_IN_ARRAY, &needly, &array);
  	opline->extended_value = strict;
  
  	return SUCCESS;
  }
  /* }}} */
  
  int zend_compile_func_count(znode *result, zend_ast_list *args) /* {{{ */
  {
  	znode arg_node;
  
  	if (args->children != 1) {
  		return FAILURE;
  	}
  
  	zend_compile_expr(&arg_node, args->child[0]);
  	zend_emit_op_tmp(result, ZEND_COUNT, &arg_node, NULL);
  	return SUCCESS;
  }
  /* }}} */
  
  int zend_compile_func_get_class(znode *result, zend_ast_list *args) /* {{{ */
  {
  	if (args->children == 0) {
  		zend_emit_op_tmp(result, ZEND_GET_CLASS, NULL, NULL);
  	} else {
  		znode arg_node;
  
  		if (args->children != 1) {
  			return FAILURE;
  		}
  
  		zend_compile_expr(&arg_node, args->child[0]);
  		zend_emit_op_tmp(result, ZEND_GET_CLASS, &arg_node, NULL);
  	}
  	return SUCCESS;
  }
  /* }}} */
  
  int zend_compile_func_get_called_class(znode *result, zend_ast_list *args) /* {{{ */
  {
  	if (args->children != 0) {
  		return FAILURE;
  	}
  
  	zend_emit_op_tmp(result, ZEND_GET_CALLED_CLASS, NULL, NULL);
  	return SUCCESS;
  }
  /* }}} */
  
  int zend_compile_func_gettype(znode *result, zend_ast_list *args) /* {{{ */
  {
  	znode arg_node;
  
  	if (args->children != 1) {
  		return FAILURE;
  	}
  
  	zend_compile_expr(&arg_node, args->child[0]);
  	zend_emit_op_tmp(result, ZEND_GET_TYPE, &arg_node, NULL);
  	return SUCCESS;
  }
  /* }}} */
  
  int zend_compile_func_num_args(znode *result, zend_ast_list *args) /* {{{ */
  {
  	if (CG(active_op_array)->function_name && args->children == 0) {
  		zend_emit_op_tmp(result, ZEND_FUNC_NUM_ARGS, NULL, NULL);
  		return SUCCESS;
  	} else {
  		return FAILURE;
  	}
  }
  /* }}} */
  
  int zend_compile_func_get_args(znode *result, zend_ast_list *args) /* {{{ */
  {
  	if (CG(active_op_array)->function_name && args->children == 0) {
  		zend_emit_op_tmp(result, ZEND_FUNC_GET_ARGS, NULL, NULL);
  		return SUCCESS;
  	} else {
  		return FAILURE;
  	}
  }
  /* }}} */
  
  int zend_compile_func_array_key_exists(znode *result, zend_ast_list *args) /* {{{ */
  {
  	znode subject, needle;
  
  	if (args->children != 2) {
  		return FAILURE;
  	}
  
  	zend_compile_expr(&needle, args->child[0]);
  	zend_compile_expr(&subject, args->child[1]);
  
  	zend_emit_op_tmp(result, ZEND_ARRAY_KEY_EXISTS, &needle, &subject);
  	return SUCCESS;
  }
  /* }}} */
  
  int zend_compile_func_array_slice(znode *result, zend_ast_list *args) /* {{{ */
  {
  	if (CG(active_op_array)->function_name
  	 && args->children == 2
  	 && args->child[0]->kind == ZEND_AST_CALL
  	 && args->child[0]->child[0]->kind == ZEND_AST_ZVAL
  	 && Z_TYPE_P(zend_ast_get_zval(args->child[0]->child[0])) == IS_STRING
  	 && args->child[0]->child[1]->kind == ZEND_AST_ARG_LIST
  	 && args->child[1]->kind == ZEND_AST_ZVAL) {
  
  		zend_string *orig_name = zend_ast_get_str(args->child[0]->child[0]);
  		zend_bool is_fully_qualified;
  		zend_string *name = zend_resolve_function_name(orig_name, args->child[0]->child[0]->attr, &is_fully_qualified);
  		zend_ast_list *list = zend_ast_get_list(args->child[0]->child[1]);
  		zval *zv = zend_ast_get_zval(args->child[1]);
  		znode first;
  
  		if (zend_string_equals_literal_ci(name, "func_get_args")
  		 && list->children == 0
  		 && Z_TYPE_P(zv) == IS_LONG
  		 && Z_LVAL_P(zv) >= 0) {
  			first.op_type = IS_CONST;
  			ZVAL_LONG(&first.u.constant, Z_LVAL_P(zv));
  			zend_emit_op_tmp(result, ZEND_FUNC_GET_ARGS, &first, NULL);
  			zend_string_release_ex(name, 0);
  			return SUCCESS;
  		}
  		zend_string_release_ex(name, 0);
  	}
  	return FAILURE;
  }
  /* }}} */
  
  int zend_try_compile_special_func(znode *result, zend_string *lcname, zend_ast_list *args, zend_function *fbc, uint32_t type) /* {{{ */
  {
  	if (fbc->internal_function.handler == ZEND_FN(display_disabled_function)) {
  		return FAILURE;
  	}
  
  	if (CG(compiler_options) & ZEND_COMPILE_NO_BUILTINS) {
  		return FAILURE;
  	}
  
  	if (zend_args_contain_unpack(args)) {
  		return FAILURE;
  	}
  
  	if (zend_string_equals_literal(lcname, "strlen")) {
  		return zend_compile_func_strlen(result, args);
  	} else if (zend_string_equals_literal(lcname, "is_null")) {
  		return zend_compile_func_typecheck(result, args, IS_NULL);
  	} else if (zend_string_equals_literal(lcname, "is_bool")) {
  		return zend_compile_func_typecheck(result, args, _IS_BOOL);
  	} else if (zend_string_equals_literal(lcname, "is_long")
  		|| zend_string_equals_literal(lcname, "is_int")
  		|| zend_string_equals_literal(lcname, "is_integer")
  	) {
  		return zend_compile_func_typecheck(result, args, IS_LONG);
  	} else if (zend_string_equals_literal(lcname, "is_float")
  		|| zend_string_equals_literal(lcname, "is_double")
  		|| zend_string_equals_literal(lcname, "is_real")
  	) {
  		return zend_compile_func_typecheck(result, args, IS_DOUBLE);
  	} else if (zend_string_equals_literal(lcname, "is_string")) {
  		return zend_compile_func_typecheck(result, args, IS_STRING);
  	} else if (zend_string_equals_literal(lcname, "is_array")) {
  		return zend_compile_func_typecheck(result, args, IS_ARRAY);
  	} else if (zend_string_equals_literal(lcname, "is_object")) {
  		return zend_compile_func_typecheck(result, args, IS_OBJECT);
  	} else if (zend_string_equals_literal(lcname, "is_resource")) {
  		return zend_compile_func_typecheck(result, args, IS_RESOURCE);
  	} else if (zend_string_equals_literal(lcname, "boolval")) {
  		return zend_compile_func_cast(result, args, _IS_BOOL);
  	} else if (zend_string_equals_literal(lcname, "intval")) {
  		return zend_compile_func_cast(result, args, IS_LONG);
  	} else if (zend_string_equals_literal(lcname, "floatval")
  		|| zend_string_equals_literal(lcname, "doubleval")
  	) {
  		return zend_compile_func_cast(result, args, IS_DOUBLE);
  	} else if (zend_string_equals_literal(lcname, "strval")) {
  		return zend_compile_func_cast(result, args, IS_STRING);
  	} else if (zend_string_equals_literal(lcname, "defined")) {
  		return zend_compile_func_defined(result, args);
  	} else if (zend_string_equals_literal(lcname, "chr") && type == BP_VAR_R) {
  		return zend_compile_func_chr(result, args);
  	} else if (zend_string_equals_literal(lcname, "ord") && type == BP_VAR_R) {
  		return zend_compile_func_ord(result, args);
  	} else if (zend_string_equals_literal(lcname, "call_user_func_array")) {
  		return zend_compile_func_cufa(result, args, lcname);
  	} else if (zend_string_equals_literal(lcname, "call_user_func")) {
  		return zend_compile_func_cuf(result, args, lcname);
  	} else if (zend_string_equals_literal(lcname, "in_array")) {
  		return zend_compile_func_in_array(result, args);
  	} else if (zend_string_equals_literal(lcname, "count")) {
  		return zend_compile_func_count(result, args);
  	} else if (zend_string_equals_literal(lcname, "get_class")) {
  		return zend_compile_func_get_class(result, args);
  	} else if (zend_string_equals_literal(lcname, "get_called_class")) {
  		return zend_compile_func_get_called_class(result, args);
  	} else if (zend_string_equals_literal(lcname, "gettype")) {
  		return zend_compile_func_gettype(result, args);
  	} else if (zend_string_equals_literal(lcname, "func_num_args")) {
  		return zend_compile_func_num_args(result, args);
  	} else if (zend_string_equals_literal(lcname, "func_get_args")) {
  		return zend_compile_func_get_args(result, args);
  	} else if (zend_string_equals_literal(lcname, "array_slice")) {
  		return zend_compile_func_array_slice(result, args);
  	} else if (zend_string_equals_literal(lcname, "array_key_exists")) {
  		return zend_compile_func_array_key_exists(result, args);
  	} else {
  		return FAILURE;
  	}
  }
  /* }}} */
  
  void zend_compile_call(znode *result, zend_ast *ast, uint32_t type) /* {{{ */
  {
  	zend_ast *name_ast = ast->child[0];
  	zend_ast *args_ast = ast->child[1];
  
  	znode name_node;
  
  	if (name_ast->kind != ZEND_AST_ZVAL || Z_TYPE_P(zend_ast_get_zval(name_ast)) != IS_STRING) {
  		zend_compile_expr(&name_node, name_ast);
  		zend_compile_dynamic_call(result, &name_node, args_ast);
  		return;
  	}
  
  	{
  		zend_bool runtime_resolution = zend_compile_function_name(&name_node, name_ast);
  		if (runtime_resolution) {
  			if (zend_string_equals_literal_ci(zend_ast_get_str(name_ast), "assert")) {
  				zend_compile_assert(result, zend_ast_get_list(args_ast), Z_STR(name_node.u.constant), NULL);
  			} else {
  				zend_compile_ns_call(result, &name_node, args_ast);
  			}
  			return;
  		}
  	}
  
  	{
  		zval *name = &name_node.u.constant;
  		zend_string *lcname;
  		zend_function *fbc;
  		zend_op *opline;
  
  		lcname = zend_string_tolower(Z_STR_P(name));
  		fbc = zend_hash_find_ptr(CG(function_table), lcname);
  
  		/* Special assert() handling should apply independently of compiler flags. */
  		if (fbc && zend_string_equals_literal(lcname, "assert")) {
  			zend_compile_assert(result, zend_ast_get_list(args_ast), lcname, fbc);
  			zend_string_release(lcname);
  			zval_ptr_dtor(&name_node.u.constant);
  			return;
  		}
  
  		if (!fbc
  			/* Don't use INIT_FCALL for recursive calls */
  		 || (fbc == (zend_function*)CG(active_op_array))
  		 || (fbc->type == ZEND_INTERNAL_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_INTERNAL_FUNCTIONS))
  		 || (fbc->type == ZEND_USER_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_USER_FUNCTIONS))
  		 || (fbc->type == ZEND_USER_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_OTHER_FILES) && fbc->op_array.filename != CG(active_op_array)->filename)
  		) {
  			zend_string_release_ex(lcname, 0);
  			zend_compile_dynamic_call(result, &name_node, args_ast);
  			return;
  		}
  
  		if (zend_try_compile_special_func(result, lcname,
  				zend_ast_get_list(args_ast), fbc, type) == SUCCESS
  		) {
  			zend_string_release_ex(lcname, 0);
  			zval_ptr_dtor(&name_node.u.constant);
  			return;
  		}
  
  		zval_ptr_dtor(&name_node.u.constant);
  		ZVAL_NEW_STR(&name_node.u.constant, lcname);
  
  		opline = zend_emit_op(NULL, ZEND_INIT_FCALL, NULL, &name_node);
  		opline->result.num = zend_alloc_cache_slot();
  
  		zend_compile_call_common(result, args_ast, fbc);
  	}
  }
  /* }}} */
  
  void zend_compile_method_call(znode *result, zend_ast *ast, uint32_t type) /* {{{ */
  {
  	zend_ast *obj_ast = ast->child[0];
  	zend_ast *method_ast = ast->child[1];
  	zend_ast *args_ast = ast->child[2];
  
  	znode obj_node, method_node;
  	zend_op *opline;
  	zend_function *fbc = NULL;
  
  	if (is_this_fetch(obj_ast)) {
  		obj_node.op_type = IS_UNUSED;
  	} else {
  		zend_compile_expr(&obj_node, obj_ast);
  	}
  
  	zend_compile_expr(&method_node, method_ast);
  	opline = zend_emit_op(NULL, ZEND_INIT_METHOD_CALL, &obj_node, NULL);
  
  	if (method_node.op_type == IS_CONST) {
  		if (Z_TYPE(method_node.u.constant) != IS_STRING) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Method name must be a string");
  		}
  
  		opline->op2_type = IS_CONST;
  		opline->op2.constant = zend_add_func_name_literal(
  			Z_STR(method_node.u.constant));
  		opline->result.num = zend_alloc_cache_slots(2);
  	} else {
  		SET_NODE(opline->op2, &method_node);
  	}
  
  	/* Check if this calls a known method on $this */
  	if (opline->op1_type == IS_UNUSED && opline->op2_type == IS_CONST &&
  			CG(active_class_entry) && zend_is_scope_known()) {
  		zend_string *lcname = Z_STR_P(CT_CONSTANT(opline->op2) + 1);
  		fbc = zend_hash_find_ptr(&CG(active_class_entry)->function_table, lcname);
  
  		/* We only know the exact method that is being called if it is either private or final.
  		 * Otherwise an overriding method in a child class may be called. */
  		if (fbc && !(fbc->common.fn_flags & (ZEND_ACC_PRIVATE|ZEND_ACC_FINAL))) {
  			fbc = NULL;
  		}
  	}
  
  	zend_compile_call_common(result, args_ast, fbc);
  }
  /* }}} */
  
  static zend_bool zend_is_constructor(zend_string *name) /* {{{ */
  {
  	return zend_string_equals_literal_ci(name, ZEND_CONSTRUCTOR_FUNC_NAME);
  }
  /* }}} */
  
  void zend_compile_static_call(znode *result, zend_ast *ast, uint32_t type) /* {{{ */
  {
  	zend_ast *class_ast = ast->child[0];
  	zend_ast *method_ast = ast->child[1];
  	zend_ast *args_ast = ast->child[2];
  
  	znode class_node, method_node;
  	zend_op *opline;
  	zend_function *fbc = NULL;
  
  	zend_compile_class_ref(&class_node, class_ast, ZEND_FETCH_CLASS_EXCEPTION);
  
  	zend_compile_expr(&method_node, method_ast);
  	if (method_node.op_type == IS_CONST) {
  		zval *name = &method_node.u.constant;
  		if (Z_TYPE_P(name) != IS_STRING) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Method name must be a string");
  		}
  		if (zend_is_constructor(Z_STR_P(name))) {
  			zval_ptr_dtor(name);
  			method_node.op_type = IS_UNUSED;
  		}
  	}
  
  	opline = get_next_op();
  	opline->opcode = ZEND_INIT_STATIC_METHOD_CALL;
  
  	zend_set_class_name_op1(opline, &class_node);
  
  	if (method_node.op_type == IS_CONST) {
  		opline->op2_type = IS_CONST;
  		opline->op2.constant = zend_add_func_name_literal(
  			Z_STR(method_node.u.constant));
  		opline->result.num = zend_alloc_cache_slots(2);
  	} else {
  		if (opline->op1_type == IS_CONST) {
  			opline->result.num = zend_alloc_cache_slot();
  		}
  		SET_NODE(opline->op2, &method_node);
  	}
  
  	/* Check if we already know which method we're calling */
  	if (opline->op2_type == IS_CONST) {
  		zend_class_entry *ce = NULL;
  		if (opline->op1_type == IS_CONST) {
  			zend_string *lcname = Z_STR_P(CT_CONSTANT(opline->op1) + 1);
  			ce = zend_hash_find_ptr(CG(class_table), lcname);
  			if (!ce && CG(active_class_entry)
  					&& zend_string_equals_ci(CG(active_class_entry)->name, lcname)) {
  				ce = CG(active_class_entry);
  			}
  		} else if (opline->op1_type == IS_UNUSED
  				&& (opline->op1.num & ZEND_FETCH_CLASS_MASK) == ZEND_FETCH_CLASS_SELF
  				&& zend_is_scope_known()) {
  			ce = CG(active_class_entry);
  		}
  		if (ce) {
  			zend_string *lcname = Z_STR_P(CT_CONSTANT(opline->op2) + 1);
  			fbc = zend_hash_find_ptr(&ce->function_table, lcname);
  			if (fbc && !(fbc->common.fn_flags & ZEND_ACC_PUBLIC)) {
  				if (ce != CG(active_class_entry)
  				 && ((fbc->common.fn_flags & ZEND_ACC_PRIVATE)
  				  || !(fbc->common.scope->ce_flags & ZEND_ACC_LINKED)
  				  || (CG(active_class_entry)
  				   && !(CG(active_class_entry)->ce_flags & ZEND_ACC_LINKED))
  				  || !zend_check_protected(zend_get_function_root_class(fbc), CG(active_class_entry)))) {
  					/* incompatible function */
  					fbc = NULL;
  				}
  			}
  		}
  	}
  
  	zend_compile_call_common(result, args_ast, fbc);
  }
  /* }}} */
  
  zend_op *zend_compile_class_decl(zend_ast *ast, zend_bool toplevel);
  
  void zend_compile_new(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *class_ast = ast->child[0];
  	zend_ast *args_ast = ast->child[1];
  
  	znode class_node, ctor_result;
  	zend_op *opline;
  
  	if (class_ast->kind == ZEND_AST_CLASS) {
  		/* jump over anon class declaration */
  		opline = zend_compile_class_decl(class_ast, 0);
  		class_node.op_type = opline->result_type;
  		class_node.u.op.var = opline->result.var;
  		opline->extended_value = get_next_op_number();
  	} else {
  		zend_compile_class_ref(&class_node, class_ast, ZEND_FETCH_CLASS_EXCEPTION);
  	}
  
  	opline = zend_emit_op(result, ZEND_NEW, NULL, NULL);
  
  	if (class_node.op_type == IS_CONST) {
  		opline->op1_type = IS_CONST;
  		opline->op1.constant = zend_add_class_name_literal(
  			Z_STR(class_node.u.constant));
  		opline->op2.num = zend_alloc_cache_slot();
  	} else {
  		SET_NODE(opline->op1, &class_node);
  	}
  
  	zend_compile_call_common(&ctor_result, args_ast, NULL);
  	zend_do_free(&ctor_result);
  }
  /* }}} */
  
  void zend_compile_clone(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *obj_ast = ast->child[0];
  
  	znode obj_node;
  	zend_compile_expr(&obj_node, obj_ast);
  
  	zend_emit_op_tmp(result, ZEND_CLONE, &obj_node, NULL);
  }
  /* }}} */
  
  void zend_compile_global_var(zend_ast *ast) /* {{{ */
  {
  	zend_ast *var_ast = ast->child[0];
  	zend_ast *name_ast = var_ast->child[0];
  
  	znode name_node, result;
  
  	zend_compile_expr(&name_node, name_ast);
  	if (name_node.op_type == IS_CONST) {
  		convert_to_string(&name_node.u.constant);
  	}
  
  	if (is_this_fetch(var_ast)) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot use $this as global variable");
  	} else if (zend_try_compile_cv(&result, var_ast) == SUCCESS) {
  		zend_op *opline = zend_emit_op(NULL, ZEND_BIND_GLOBAL, &result, &name_node);
  		opline->extended_value = zend_alloc_cache_slot();
  	} else {
  		/* name_ast should be evaluated only. FETCH_GLOBAL_LOCK instructs FETCH_W
  		 * to not free the name_node operand, so it can be reused in the following
  		 * ASSIGN_REF, which then frees it. */
  		zend_op *opline = zend_emit_op(&result, ZEND_FETCH_W, &name_node, NULL);
  		opline->extended_value = ZEND_FETCH_GLOBAL_LOCK;
  
  		if (name_node.op_type == IS_CONST) {
  			zend_string_addref(Z_STR(name_node.u.constant));
  		}
  
  		zend_emit_assign_ref_znode(
  			zend_ast_create(ZEND_AST_VAR, zend_ast_create_znode(&name_node)),
  			&result
  		);
  	}
  }
  /* }}} */
  
  static void zend_compile_static_var_common(zend_ast *var_ast, zval *value, uint32_t by_ref) /* {{{ */
  {
  	zend_op *opline;
  	zend_string *var_name = zval_make_interned_string(zend_ast_get_zval(var_ast));
  
  	if (!CG(active_op_array)->static_variables) {
  		if (CG(active_op_array)->scope) {
  			CG(active_op_array)->scope->ce_flags |= ZEND_HAS_STATIC_IN_METHODS;
  		}
  		CG(active_op_array)->static_variables = zend_new_array(8);
  	}
  
  	value = zend_hash_update(CG(active_op_array)->static_variables, var_name, value);
  
  	if (zend_string_equals_literal(var_name, "this")) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot use $this as static variable");
  	}
  
  	opline = zend_emit_op(NULL, ZEND_BIND_STATIC, NULL, NULL);
  	opline->op1_type = IS_CV;
  	opline->op1.var = lookup_cv(var_name);
  	opline->extended_value = (uint32_t)((char*)value - (char*)CG(active_op_array)->static_variables->arData) | by_ref;
  }
  /* }}} */
  
  void zend_compile_static_var(zend_ast *ast) /* {{{ */
  {
  	zend_ast *var_ast = ast->child[0];
  	zend_ast *value_ast = ast->child[1];
  	zval value_zv;
  
  	if (value_ast) {
  		zend_const_expr_to_zval(&value_zv, value_ast);
  	} else {
  		ZVAL_NULL(&value_zv);
  	}
  
  	zend_compile_static_var_common(var_ast, &value_zv, ZEND_BIND_REF);
  }
  /* }}} */
  
  void zend_compile_unset(zend_ast *ast) /* {{{ */
  {
  	zend_ast *var_ast = ast->child[0];
  	znode var_node;
  	zend_op *opline;
  
  	zend_ensure_writable_variable(var_ast);
  
  	switch (var_ast->kind) {
  		case ZEND_AST_VAR:
  			if (is_this_fetch(var_ast)) {
  				zend_error_noreturn(E_COMPILE_ERROR, "Cannot unset $this");
  			} else if (zend_try_compile_cv(&var_node, var_ast) == SUCCESS) {
  				opline = zend_emit_op(NULL, ZEND_UNSET_CV, &var_node, NULL);
  			} else {
  				opline = zend_compile_simple_var_no_cv(NULL, var_ast, BP_VAR_UNSET, 0);
  				opline->opcode = ZEND_UNSET_VAR;
  			}
  			return;
  		case ZEND_AST_DIM:
  			opline = zend_compile_dim(NULL, var_ast, BP_VAR_UNSET);
  			opline->opcode = ZEND_UNSET_DIM;
  			return;
  		case ZEND_AST_PROP:
  			opline = zend_compile_prop(NULL, var_ast, BP_VAR_UNSET, 0);
  			opline->opcode = ZEND_UNSET_OBJ;
  			return;
  		case ZEND_AST_STATIC_PROP:
  			opline = zend_compile_static_prop(NULL, var_ast, BP_VAR_UNSET, 0, 0);
  			opline->opcode = ZEND_UNSET_STATIC_PROP;
  			return;
  		EMPTY_SWITCH_DEFAULT_CASE()
  	}
  }
  /* }}} */
  
  static int zend_handle_loops_and_finally_ex(zend_long depth, znode *return_value) /* {{{ */
  {
  	zend_loop_var *base;
  	zend_loop_var *loop_var = zend_stack_top(&CG(loop_var_stack));
  
  	if (!loop_var) {
  		return 1;
  	}
  	base = zend_stack_base(&CG(loop_var_stack));
  	for (; loop_var >= base; loop_var--) {
  		if (loop_var->opcode == ZEND_FAST_CALL) {
  			zend_op *opline = get_next_op();
  
  			opline->opcode = ZEND_FAST_CALL;
  			opline->result_type = IS_TMP_VAR;
  			opline->result.var = loop_var->var_num;
  			if (return_value) {
  				SET_NODE(opline->op2, return_value);
  			}
  			opline->op1.num = loop_var->try_catch_offset;
  		} else if (loop_var->opcode == ZEND_DISCARD_EXCEPTION) {
  			zend_op *opline = get_next_op();
  			opline->opcode = ZEND_DISCARD_EXCEPTION;
  			opline->op1_type = IS_TMP_VAR;
  			opline->op1.var = loop_var->var_num;
  		} else if (loop_var->opcode == ZEND_RETURN) {
  			/* Stack separator */
  			break;
  		} else if (depth <= 1) {
  			return 1;
  		} else if (loop_var->opcode == ZEND_NOP) {
  			/* Loop doesn't have freeable variable */
  			depth--;
  		} else {
  			zend_op *opline;
  
  			ZEND_ASSERT(loop_var->var_type & (IS_VAR|IS_TMP_VAR));
  			opline = get_next_op();
  			opline->opcode = loop_var->opcode;
  			opline->op1_type = loop_var->var_type;
  			opline->op1.var = loop_var->var_num;
  			opline->extended_value = ZEND_FREE_ON_RETURN;
  			depth--;
  	    }
  	}
  	return (depth == 0);
  }
  /* }}} */
  
  static int zend_handle_loops_and_finally(znode *return_value) /* {{{ */
  {
  	return zend_handle_loops_and_finally_ex(zend_stack_count(&CG(loop_var_stack)) + 1, return_value);
  }
  /* }}} */
  
  static int zend_has_finally_ex(zend_long depth) /* {{{ */
  {
  	zend_loop_var *base;
  	zend_loop_var *loop_var = zend_stack_top(&CG(loop_var_stack));
  
  	if (!loop_var) {
  		return 0;
  	}
  	base = zend_stack_base(&CG(loop_var_stack));
  	for (; loop_var >= base; loop_var--) {
  		if (loop_var->opcode == ZEND_FAST_CALL) {
  			return 1;
  		} else if (loop_var->opcode == ZEND_DISCARD_EXCEPTION) {
  		} else if (loop_var->opcode == ZEND_RETURN) {
  			/* Stack separator */
  			return 0;
  		} else if (depth <= 1) {
  			return 0;
  		} else {
  			depth--;
  	    }
  	}
  	return 0;
  }
  /* }}} */
  
  static int zend_has_finally(void) /* {{{ */
  {
  	return zend_has_finally_ex(zend_stack_count(&CG(loop_var_stack)) + 1);
  }
  /* }}} */
  
  void zend_compile_return(zend_ast *ast) /* {{{ */
  {
  	zend_ast *expr_ast = ast->child[0];
  	zend_bool is_generator = (CG(active_op_array)->fn_flags & ZEND_ACC_GENERATOR) != 0;
  	zend_bool by_ref = (CG(active_op_array)->fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0;
  
  	znode expr_node;
  	zend_op *opline;
  
  	if (is_generator) {
  		/* For generators the by-ref flag refers to yields, not returns */
  		by_ref = 0;
  	}
  
  	if (!expr_ast) {
  		expr_node.op_type = IS_CONST;
  		ZVAL_NULL(&expr_node.u.constant);
  	} else if (by_ref && zend_is_variable(expr_ast)) {
  		zend_compile_var(&expr_node, expr_ast, BP_VAR_W, 1);
  	} else {
  		zend_compile_expr(&expr_node, expr_ast);
  	}
  
  	if ((CG(active_op_array)->fn_flags & ZEND_ACC_HAS_FINALLY_BLOCK)
  	 && (expr_node.op_type == IS_CV || (by_ref && expr_node.op_type == IS_VAR))
  	 && zend_has_finally()) {
  		/* Copy return value into temporary VAR to avoid modification in finally code */
  		if (by_ref) {
  			zend_emit_op(&expr_node, ZEND_MAKE_REF, &expr_node, NULL);
  		} else {
  			zend_emit_op_tmp(&expr_node, ZEND_QM_ASSIGN, &expr_node, NULL);
  		}
  	}
  
  	/* Generator return types are handled separately */
  	if (!is_generator && CG(active_op_array)->fn_flags & ZEND_ACC_HAS_RETURN_TYPE) {
  		zend_emit_return_type_check(
  			expr_ast ? &expr_node : NULL, CG(active_op_array)->arg_info - 1, 0);
  	}
  
  	zend_handle_loops_and_finally((expr_node.op_type & (IS_TMP_VAR | IS_VAR)) ? &expr_node : NULL);
  
  	opline = zend_emit_op(NULL, by_ref ? ZEND_RETURN_BY_REF : ZEND_RETURN,
  		&expr_node, NULL);
  
  	if (by_ref && expr_ast) {
  		if (zend_is_call(expr_ast)) {
  			opline->extended_value = ZEND_RETURNS_FUNCTION;
  		} else if (!zend_is_variable(expr_ast)) {
  			opline->extended_value = ZEND_RETURNS_VALUE;
  		}
  	}
  }
  /* }}} */
  
  void zend_compile_echo(zend_ast *ast) /* {{{ */
  {
  	zend_op *opline;
  	zend_ast *expr_ast = ast->child[0];
  
  	znode expr_node;
  	zend_compile_expr(&expr_node, expr_ast);
  
  	opline = zend_emit_op(NULL, ZEND_ECHO, &expr_node, NULL);
  	opline->extended_value = 0;
  }
  /* }}} */
  
  void zend_compile_throw(zend_ast *ast) /* {{{ */
  {
  	zend_ast *expr_ast = ast->child[0];
  
  	znode expr_node;
  	zend_compile_expr(&expr_node, expr_ast);
  
  	zend_emit_op(NULL, ZEND_THROW, &expr_node, NULL);
  }
  /* }}} */
  
  void zend_compile_break_continue(zend_ast *ast) /* {{{ */
  {
  	zend_ast *depth_ast = ast->child[0];
  
  	zend_op *opline;
  	zend_long depth;
  
  	ZEND_ASSERT(ast->kind == ZEND_AST_BREAK || ast->kind == ZEND_AST_CONTINUE);
  
  	if (depth_ast) {
  		zval *depth_zv;
  		if (depth_ast->kind != ZEND_AST_ZVAL) {
  			zend_error_noreturn(E_COMPILE_ERROR, "'%s' operator with non-integer operand "
  				"is no longer supported", ast->kind == ZEND_AST_BREAK ? "break" : "continue");
  		}
  
  		depth_zv = zend_ast_get_zval(depth_ast);
  		if (Z_TYPE_P(depth_zv) != IS_LONG || Z_LVAL_P(depth_zv) < 1) {
  			zend_error_noreturn(E_COMPILE_ERROR, "'%s' operator accepts only positive integers",
  				ast->kind == ZEND_AST_BREAK ? "break" : "continue");
  		}
  
  		depth = Z_LVAL_P(depth_zv);
  	} else {
  		depth = 1;
  	}
  
  	if (CG(context).current_brk_cont == -1) {
  		zend_error_noreturn(E_COMPILE_ERROR, "'%s' not in the 'loop' or 'switch' context",
  			ast->kind == ZEND_AST_BREAK ? "break" : "continue");
  	} else {
  		if (!zend_handle_loops_and_finally_ex(depth, NULL)) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot '%s' " ZEND_LONG_FMT " level%s",
  				ast->kind == ZEND_AST_BREAK ? "break" : "continue",
  				depth, depth == 1 ? "" : "s");
  		}
  	}
  
  	if (ast->kind == ZEND_AST_CONTINUE) {
  		int d, cur = CG(context).current_brk_cont;
  		for (d = depth - 1; d > 0; d--) {
  			cur = CG(context).brk_cont_array[cur].parent;
  			ZEND_ASSERT(cur != -1);
  		}
  
  		if (CG(context).brk_cont_array[cur].is_switch) {
  			if (depth == 1) {
  				zend_error(E_WARNING,
  					"\"continue\" targeting switch is equivalent to \"break\". " \
  					"Did you mean to use \"continue " ZEND_LONG_FMT "\"?",
  					depth + 1);
  			} else {
  				zend_error(E_WARNING,
  					"\"continue " ZEND_LONG_FMT "\" targeting switch is equivalent to \"break " ZEND_LONG_FMT "\". " \
  					"Did you mean to use \"continue " ZEND_LONG_FMT "\"?",
  					depth, depth, depth + 1);
  			}
  		}
  	}
  
  	opline = zend_emit_op(NULL, ast->kind == ZEND_AST_BREAK ? ZEND_BRK : ZEND_CONT, NULL, NULL);
  	opline->op1.num = CG(context).current_brk_cont;
  	opline->op2.num = depth;
  }
  /* }}} */
  
  void zend_resolve_goto_label(zend_op_array *op_array, zend_op *opline) /* {{{ */
  {
  	zend_label *dest;
  	int current, remove_oplines = opline->op1.num;
  	zval *label;
  	uint32_t opnum = opline - op_array->opcodes;
  
  	label = CT_CONSTANT_EX(op_array, opline->op2.constant);
  	if (CG(context).labels == NULL ||
  	    (dest = zend_hash_find_ptr(CG(context).labels, Z_STR_P(label))) == NULL
  	) {
  		CG(in_compilation) = 1;
  		CG(active_op_array) = op_array;
  		CG(zend_lineno) = opline->lineno;
  		zend_error_noreturn(E_COMPILE_ERROR, "'goto' to undefined label '%s'", Z_STRVAL_P(label));
  	}
  
  	zval_ptr_dtor_str(label);
  	ZVAL_NULL(label);
  
  	current = opline->extended_value;
  	for (; current != dest->brk_cont; current = CG(context).brk_cont_array[current].parent) {
  		if (current == -1) {
  			CG(in_compilation) = 1;
  			CG(active_op_array) = op_array;
  			CG(zend_lineno) = opline->lineno;
  			zend_error_noreturn(E_COMPILE_ERROR, "'goto' into loop or switch statement is disallowed");
  		}
  		if (CG(context).brk_cont_array[current].start >= 0) {
  			remove_oplines--;
  		}
  	}
  
  	for (current = 0; current < op_array->last_try_catch; ++current) {
  		zend_try_catch_element *elem = &op_array->try_catch_array[current];
  		if (elem->try_op > opnum) {
  			break;
  		}
  		if (elem->finally_op && opnum < elem->finally_op - 1
  			&& (dest->opline_num > elem->finally_end || dest->opline_num < elem->try_op)
  		) {
  			remove_oplines--;
  		}
  	}
  
  	opline->opcode = ZEND_JMP;
  	opline->op1.opline_num = dest->opline_num;
  	opline->extended_value = 0;
  	SET_UNUSED(opline->op1);
  	SET_UNUSED(opline->op2);
  	SET_UNUSED(opline->result);
  
  	ZEND_ASSERT(remove_oplines >= 0);
  	while (remove_oplines--) {
  		opline--;
  		MAKE_NOP(opline);
  		ZEND_VM_SET_OPCODE_HANDLER(opline);
  	}
  }
  /* }}} */
  
  void zend_compile_goto(zend_ast *ast) /* {{{ */
  {
  	zend_ast *label_ast = ast->child[0];
  	znode label_node;
  	zend_op *opline;
  	uint32_t opnum_start = get_next_op_number();
  
  	zend_compile_expr(&label_node, label_ast);
  
  	/* Label resolution and unwinding adjustments happen in pass two. */
  	zend_handle_loops_and_finally(NULL);
  	opline = zend_emit_op(NULL, ZEND_GOTO, NULL, &label_node);
  	opline->op1.num = get_next_op_number() - opnum_start - 1;
  	opline->extended_value = CG(context).current_brk_cont;
  }
  /* }}} */
  
  void zend_compile_label(zend_ast *ast) /* {{{ */
  {
  	zend_string *label = zend_ast_get_str(ast->child[0]);
  	zend_label dest;
  
  	if (!CG(context).labels) {
  		ALLOC_HASHTABLE(CG(context).labels);
  		zend_hash_init(CG(context).labels, 8, NULL, label_ptr_dtor, 0);
  	}
  
  	dest.brk_cont = CG(context).current_brk_cont;
  	dest.opline_num = get_next_op_number();
  
  	if (!zend_hash_add_mem(CG(context).labels, label, &dest, sizeof(zend_label))) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Label '%s' already defined", ZSTR_VAL(label));
  	}
  }
  /* }}} */
  
  void zend_compile_while(zend_ast *ast) /* {{{ */
  {
  	zend_ast *cond_ast = ast->child[0];
  	zend_ast *stmt_ast = ast->child[1];
  	znode cond_node;
  	uint32_t opnum_start, opnum_jmp, opnum_cond;
  
  	opnum_jmp = zend_emit_jump(0);
  
  	zend_begin_loop(ZEND_NOP, NULL, 0);
  
  	opnum_start = get_next_op_number();
  	zend_compile_stmt(stmt_ast);
  
  	opnum_cond = get_next_op_number();
  	zend_update_jump_target(opnum_jmp, opnum_cond);
  	zend_compile_expr(&cond_node, cond_ast);
  
  	zend_emit_cond_jump(ZEND_JMPNZ, &cond_node, opnum_start);
  
  	zend_end_loop(opnum_cond, NULL);
  }
  /* }}} */
  
  void zend_compile_do_while(zend_ast *ast) /* {{{ */
  {
  	zend_ast *stmt_ast = ast->child[0];
  	zend_ast *cond_ast = ast->child[1];
  
  	znode cond_node;
  	uint32_t opnum_start, opnum_cond;
  
  	zend_begin_loop(ZEND_NOP, NULL, 0);
  
  	opnum_start = get_next_op_number();
  	zend_compile_stmt(stmt_ast);
  
  	opnum_cond = get_next_op_number();
  	zend_compile_expr(&cond_node, cond_ast);
  
  	zend_emit_cond_jump(ZEND_JMPNZ, &cond_node, opnum_start);
  
  	zend_end_loop(opnum_cond, NULL);
  }
  /* }}} */
  
  void zend_compile_expr_list(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast_list *list;
  	uint32_t i;
  
  	result->op_type = IS_CONST;
  	ZVAL_TRUE(&result->u.constant);
  
  	if (!ast) {
  		return;
  	}
  
  	list = zend_ast_get_list(ast);
  	for (i = 0; i < list->children; ++i) {
  		zend_ast *expr_ast = list->child[i];
  
  		zend_do_free(result);
  		zend_compile_expr(result, expr_ast);
  	}
  }
  /* }}} */
  
  void zend_compile_for(zend_ast *ast) /* {{{ */
  {
  	zend_ast *init_ast = ast->child[0];
  	zend_ast *cond_ast = ast->child[1];
  	zend_ast *loop_ast = ast->child[2];
  	zend_ast *stmt_ast = ast->child[3];
  
  	znode result;
  	uint32_t opnum_start, opnum_jmp, opnum_loop;
  
  	zend_compile_expr_list(&result, init_ast);
  	zend_do_free(&result);
  
  	opnum_jmp = zend_emit_jump(0);
  
  	zend_begin_loop(ZEND_NOP, NULL, 0);
  
  	opnum_start = get_next_op_number();
  	zend_compile_stmt(stmt_ast);
  
  	opnum_loop = get_next_op_number();
  	zend_compile_expr_list(&result, loop_ast);
  	zend_do_free(&result);
  
  	zend_update_jump_target_to_next(opnum_jmp);
  	zend_compile_expr_list(&result, cond_ast);
  	zend_do_extended_stmt();
  
  	zend_emit_cond_jump(ZEND_JMPNZ, &result, opnum_start);
  
  	zend_end_loop(opnum_loop, NULL);
  }
  /* }}} */
  
  void zend_compile_foreach(zend_ast *ast) /* {{{ */
  {
  	zend_ast *expr_ast = ast->child[0];
  	zend_ast *value_ast = ast->child[1];
  	zend_ast *key_ast = ast->child[2];
  	zend_ast *stmt_ast = ast->child[3];
  	zend_bool by_ref = value_ast->kind == ZEND_AST_REF;
  	zend_bool is_variable = zend_is_variable(expr_ast) && zend_can_write_to_variable(expr_ast);
  
  	znode expr_node, reset_node, value_node, key_node;
  	zend_op *opline;
  	uint32_t opnum_reset, opnum_fetch;
  
  	if (key_ast) {
  		if (key_ast->kind == ZEND_AST_REF) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Key element cannot be a reference");
  		}
  		if (key_ast->kind == ZEND_AST_ARRAY) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use list as key element");
  		}
  	}
  
  	if (by_ref) {
  		value_ast = value_ast->child[0];
  	}
  
  	if (value_ast->kind == ZEND_AST_ARRAY && zend_propagate_list_refs(value_ast)) {
  		by_ref = 1;
  	}
  
  	if (by_ref && is_variable) {
  		zend_compile_var(&expr_node, expr_ast, BP_VAR_W, 1);
  	} else {
  		zend_compile_expr(&expr_node, expr_ast);
  	}
  
  	if (by_ref) {
  		zend_separate_if_call_and_write(&expr_node, expr_ast, BP_VAR_W);
  	}
  
  	opnum_reset = get_next_op_number();
  	opline = zend_emit_op(&reset_node, by_ref ? ZEND_FE_RESET_RW : ZEND_FE_RESET_R, &expr_node, NULL);
  
  	zend_begin_loop(ZEND_FE_FREE, &reset_node, 0);
  
  	opnum_fetch = get_next_op_number();
  	opline = zend_emit_op(NULL, by_ref ? ZEND_FE_FETCH_RW : ZEND_FE_FETCH_R, &reset_node, NULL);
  
  	if (is_this_fetch(value_ast)) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this");
  	} else if (value_ast->kind == ZEND_AST_VAR &&
  		zend_try_compile_cv(&value_node, value_ast) == SUCCESS) {
  		SET_NODE(opline->op2, &value_node);
  	} else {
  		opline->op2_type = IS_VAR;
  		opline->op2.var = get_temporary_variable();
  		GET_NODE(&value_node, opline->op2);
  		if (value_ast->kind == ZEND_AST_ARRAY) {
  			zend_compile_list_assign(NULL, value_ast, &value_node, value_ast->attr);
  		} else if (by_ref) {
  			zend_emit_assign_ref_znode(value_ast, &value_node);
  		} else {
  			zend_emit_assign_znode(value_ast, &value_node);
  		}
  	}
  
  	if (key_ast) {
  		opline = &CG(active_op_array)->opcodes[opnum_fetch];
  		zend_make_tmp_result(&key_node, opline);
  		zend_emit_assign_znode(key_ast, &key_node);
  	}
  
  	zend_compile_stmt(stmt_ast);
  
  	/* Place JMP and FE_FREE on the line where foreach starts. It would be
  	 * better to use the end line, but this information is not available
  	 * currently. */
  	CG(zend_lineno) = ast->lineno;
  	zend_emit_jump(opnum_fetch);
  
  	opline = &CG(active_op_array)->opcodes[opnum_reset];
  	opline->op2.opline_num = get_next_op_number();
  
  	opline = &CG(active_op_array)->opcodes[opnum_fetch];
  	opline->extended_value = get_next_op_number();
  
  	zend_end_loop(opnum_fetch, &reset_node);
  
  	opline = zend_emit_op(NULL, ZEND_FE_FREE, &reset_node, NULL);
  }
  /* }}} */
  
  void zend_compile_if(zend_ast *ast) /* {{{ */
  {
  	zend_ast_list *list = zend_ast_get_list(ast);
  	uint32_t i;
  	uint32_t *jmp_opnums = NULL;
  
  	if (list->children > 1) {
  		jmp_opnums = safe_emalloc(sizeof(uint32_t), list->children - 1, 0);
  	}
  
  	for (i = 0; i < list->children; ++i) {
  		zend_ast *elem_ast = list->child[i];
  		zend_ast *cond_ast = elem_ast->child[0];
  		zend_ast *stmt_ast = elem_ast->child[1];
  
  		znode cond_node;
  		uint32_t opnum_jmpz;
  		if (cond_ast) {
  			zend_compile_expr(&cond_node, cond_ast);
  			opnum_jmpz = zend_emit_cond_jump(ZEND_JMPZ, &cond_node, 0);
  		}
  
  		zend_compile_stmt(stmt_ast);
  
  		if (i != list->children - 1) {
  			jmp_opnums[i] = zend_emit_jump(0);
  		}
  
  		if (cond_ast) {
  			zend_update_jump_target_to_next(opnum_jmpz);
  		}
  	}
  
  	if (list->children > 1) {
  		for (i = 0; i < list->children - 1; ++i) {
  			zend_update_jump_target_to_next(jmp_opnums[i]);
  		}
  		efree(jmp_opnums);
  	}
  }
  /* }}} */
  
  static zend_uchar determine_switch_jumptable_type(zend_ast_list *cases) {
  	uint32_t i;
  	zend_uchar common_type = IS_UNDEF;
  	for (i = 0; i < cases->children; i++) {
  		zend_ast *case_ast = cases->child[i];
  		zend_ast **cond_ast = &case_ast->child[0];
  		zval *cond_zv;
  		if (!case_ast->child[0]) {
  			/* Skip default clause */
  			continue;
  		}
  
  		zend_eval_const_expr(cond_ast);
  		if ((*cond_ast)->kind != ZEND_AST_ZVAL) {
  			/* Non-constant case */
  			return IS_UNDEF;
  		}
  
  		cond_zv = zend_ast_get_zval(case_ast->child[0]);
  		if (Z_TYPE_P(cond_zv) != IS_LONG && Z_TYPE_P(cond_zv) != IS_STRING) {
  			/* We only optimize switched on integers and strings */
  			return IS_UNDEF;
  		}
  
  		if (common_type == IS_UNDEF) {
  			common_type = Z_TYPE_P(cond_zv);
  		} else if (common_type != Z_TYPE_P(cond_zv)) {
  			/* Non-uniform case types */
  			return IS_UNDEF;
  		}
  
  		if (Z_TYPE_P(cond_zv) == IS_STRING
  				&& is_numeric_string(Z_STRVAL_P(cond_zv), Z_STRLEN_P(cond_zv), NULL, NULL, 0)) {
  			/* Numeric strings cannot be compared with a simple hash lookup */
  			return IS_UNDEF;
  		}
  	}
  
  	return common_type;
  }
  
  static zend_bool should_use_jumptable(zend_ast_list *cases, zend_uchar jumptable_type) {
  	if (CG(compiler_options) & ZEND_COMPILE_NO_JUMPTABLES) {
  		return 0;
  	}
  
  	/* Thresholds are chosen based on when the average switch time for equidistributed
  	 * input becomes smaller when using the jumptable optimization. */
  	if (jumptable_type == IS_LONG) {
  		return cases->children >= 5;
  	} else {
  		ZEND_ASSERT(jumptable_type == IS_STRING);
  		return cases->children >= 2;
  	}
  }
  
  void zend_compile_switch(zend_ast *ast) /* {{{ */
  {
  	zend_ast *expr_ast = ast->child[0];
  	zend_ast_list *cases = zend_ast_get_list(ast->child[1]);
  
  	uint32_t i;
  	zend_bool has_default_case = 0;
  
  	znode expr_node, case_node;
  	zend_op *opline;
  	uint32_t *jmpnz_opnums, opnum_default_jmp, opnum_switch;
  	zend_uchar jumptable_type;
  	HashTable *jumptable = NULL;
  
  	zend_compile_expr(&expr_node, expr_ast);
  
  	zend_begin_loop(ZEND_FREE, &expr_node, 1);
  
  	case_node.op_type = IS_TMP_VAR;
  	case_node.u.op.var = get_temporary_variable();
  
  	jumptable_type = determine_switch_jumptable_type(cases);
  	if (jumptable_type != IS_UNDEF && should_use_jumptable(cases, jumptable_type)) {
  		znode jumptable_op;
  
  		ALLOC_HASHTABLE(jumptable);
  		zend_hash_init(jumptable, cases->children, NULL, NULL, 0);
  		jumptable_op.op_type = IS_CONST;
  		ZVAL_ARR(&jumptable_op.u.constant, jumptable);
  
  		opline = zend_emit_op(NULL,
  			jumptable_type == IS_LONG ? ZEND_SWITCH_LONG : ZEND_SWITCH_STRING,
  			&expr_node, &jumptable_op);
  		if (opline->op1_type == IS_CONST) {
  			Z_TRY_ADDREF_P(CT_CONSTANT(opline->op1));
  		}
  		opnum_switch = opline - CG(active_op_array)->opcodes;
  	}
  
  	jmpnz_opnums = safe_emalloc(sizeof(uint32_t), cases->children, 0);
  	for (i = 0; i < cases->children; ++i) {
  		zend_ast *case_ast = cases->child[i];
  		zend_ast *cond_ast = case_ast->child[0];
  		znode cond_node;
  
  		if (!cond_ast) {
  			if (has_default_case) {
  				CG(zend_lineno) = case_ast->lineno;
  				zend_error_noreturn(E_COMPILE_ERROR,
  					"Switch statements may only contain one default clause");
  			}
  			has_default_case = 1;
  			continue;
  		}
  
  		zend_compile_expr(&cond_node, cond_ast);
  
  		if (expr_node.op_type == IS_CONST
  			&& Z_TYPE(expr_node.u.constant) == IS_FALSE) {
  			jmpnz_opnums[i] = zend_emit_cond_jump(ZEND_JMPZ, &cond_node, 0);
  		} else if (expr_node.op_type == IS_CONST
  			&& Z_TYPE(expr_node.u.constant) == IS_TRUE) {
  			jmpnz_opnums[i] = zend_emit_cond_jump(ZEND_JMPNZ, &cond_node, 0);
  		} else {
  			opline = zend_emit_op(NULL,
  				(expr_node.op_type & (IS_VAR|IS_TMP_VAR)) ? ZEND_CASE : ZEND_IS_EQUAL,
  				&expr_node, &cond_node);
  			SET_NODE(opline->result, &case_node);
  			if (opline->op1_type == IS_CONST) {
  				Z_TRY_ADDREF_P(CT_CONSTANT(opline->op1));
  			}
  
  			jmpnz_opnums[i] = zend_emit_cond_jump(ZEND_JMPNZ, &case_node, 0);
  		}
  	}
  
  	opnum_default_jmp = zend_emit_jump(0);
  
  	for (i = 0; i < cases->children; ++i) {
  		zend_ast *case_ast = cases->child[i];
  		zend_ast *cond_ast = case_ast->child[0];
  		zend_ast *stmt_ast = case_ast->child[1];
  
  		if (cond_ast) {
  			zend_update_jump_target_to_next(jmpnz_opnums[i]);
  
  			if (jumptable) {
  				zval *cond_zv = zend_ast_get_zval(cond_ast);
  				zval jmp_target;
  				ZVAL_LONG(&jmp_target, get_next_op_number());
  
  				ZEND_ASSERT(Z_TYPE_P(cond_zv) == jumptable_type);
  				if (Z_TYPE_P(cond_zv) == IS_LONG) {
  					zend_hash_index_add(jumptable, Z_LVAL_P(cond_zv), &jmp_target);
  				} else {
  					ZEND_ASSERT(Z_TYPE_P(cond_zv) == IS_STRING);
  					zend_hash_add(jumptable, Z_STR_P(cond_zv), &jmp_target);
  				}
  			}
  		} else {
  			zend_update_jump_target_to_next(opnum_default_jmp);
  
  			if (jumptable) {
  				opline = &CG(active_op_array)->opcodes[opnum_switch];
  				opline->extended_value = get_next_op_number();
  			}
  		}
  
  		zend_compile_stmt(stmt_ast);
  	}
  
  	if (!has_default_case) {
  		zend_update_jump_target_to_next(opnum_default_jmp);
  
  		if (jumptable) {
  			opline = &CG(active_op_array)->opcodes[opnum_switch];
  			opline->extended_value = get_next_op_number();
  		}
  	}
  
  	zend_end_loop(get_next_op_number(), &expr_node);
  
  	if (expr_node.op_type & (IS_VAR|IS_TMP_VAR)) {
  		opline = zend_emit_op(NULL, ZEND_FREE, &expr_node, NULL);
  		opline->extended_value = ZEND_FREE_SWITCH;
  	} else if (expr_node.op_type == IS_CONST) {
  		zval_ptr_dtor_nogc(&expr_node.u.constant);
  	}
  
  	efree(jmpnz_opnums);
  }
  /* }}} */
  
  void zend_compile_try(zend_ast *ast) /* {{{ */
  {
  	zend_ast *try_ast = ast->child[0];
  	zend_ast_list *catches = zend_ast_get_list(ast->child[1]);
  	zend_ast *finally_ast = ast->child[2];
  
  	uint32_t i, j;
  	zend_op *opline;
  	uint32_t try_catch_offset;
  	uint32_t *jmp_opnums = safe_emalloc(sizeof(uint32_t), catches->children, 0);
  	uint32_t orig_fast_call_var = CG(context).fast_call_var;
  	uint32_t orig_try_catch_offset = CG(context).try_catch_offset;
  
  	if (catches->children == 0 && !finally_ast) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot use try without catch or finally");
  	}
  
  	/* label: try { } must not be equal to try { label: } */
  	if (CG(context).labels) {
  		zend_label *label;
  		ZEND_HASH_REVERSE_FOREACH_PTR(CG(context).labels, label) {
  			if (label->opline_num == get_next_op_number()) {
  				zend_emit_op(NULL, ZEND_NOP, NULL, NULL);
  			}
  			break;
  		} ZEND_HASH_FOREACH_END();
  	}
  
  	try_catch_offset = zend_add_try_element(get_next_op_number());
  
  	if (finally_ast) {
  		zend_loop_var fast_call;
  		if (!(CG(active_op_array)->fn_flags & ZEND_ACC_HAS_FINALLY_BLOCK)) {
  			CG(active_op_array)->fn_flags |= ZEND_ACC_HAS_FINALLY_BLOCK;
  		}
  		CG(context).fast_call_var = get_temporary_variable();
  
  		/* Push FAST_CALL on unwind stack */
  		fast_call.opcode = ZEND_FAST_CALL;
  		fast_call.var_type = IS_TMP_VAR;
  		fast_call.var_num = CG(context).fast_call_var;
  		fast_call.try_catch_offset = try_catch_offset;
  		zend_stack_push(&CG(loop_var_stack), &fast_call);
  	}
  
  	CG(context).try_catch_offset = try_catch_offset;
  
  	zend_compile_stmt(try_ast);
  
  	if (catches->children != 0) {
  		jmp_opnums[0] = zend_emit_jump(0);
  	}
  
  	for (i = 0; i < catches->children; ++i) {
  		zend_ast *catch_ast = catches->child[i];
  		zend_ast_list *classes = zend_ast_get_list(catch_ast->child[0]);
  		zend_ast *var_ast = catch_ast->child[1];
  		zend_ast *stmt_ast = catch_ast->child[2];
  		zend_string *var_name = zval_make_interned_string(zend_ast_get_zval(var_ast));
  		zend_bool is_last_catch = (i + 1 == catches->children);
  
  		uint32_t *jmp_multicatch = safe_emalloc(sizeof(uint32_t), classes->children - 1, 0);
  		uint32_t opnum_catch;
  
  		CG(zend_lineno) = catch_ast->lineno;
  
  		for (j = 0; j < classes->children; j++) {
  
  			zend_ast *class_ast = classes->child[j];
  			zend_bool is_last_class = (j + 1 == classes->children);
  
  			if (!zend_is_const_default_class_ref(class_ast)) {
  				zend_error_noreturn(E_COMPILE_ERROR, "Bad class name in the catch statement");
  			}
  
  			opnum_catch = get_next_op_number();
  			if (i == 0 && j == 0) {
  				CG(active_op_array)->try_catch_array[try_catch_offset].catch_op = opnum_catch;
  			}
  
  			opline = get_next_op();
  			opline->opcode = ZEND_CATCH;
  			opline->op1_type = IS_CONST;
  			opline->op1.constant = zend_add_class_name_literal(
  					zend_resolve_class_name_ast(class_ast));
  			opline->extended_value = zend_alloc_cache_slot();
  
  			if (zend_string_equals_literal(var_name, "this")) {
  				zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this");
  			}
  
  			opline->result_type = IS_CV;
  			opline->result.var = lookup_cv(var_name);
  
  			if (is_last_catch && is_last_class) {
  				opline->extended_value |= ZEND_LAST_CATCH;
  			}
  
  			if (!is_last_class) {
  				jmp_multicatch[j] = zend_emit_jump(0);
  				opline = &CG(active_op_array)->opcodes[opnum_catch];
  				opline->op2.opline_num = get_next_op_number();
  			}
  		}
  
  		for (j = 0; j < classes->children - 1; j++) {
  			zend_update_jump_target_to_next(jmp_multicatch[j]);
  		}
  
  		efree(jmp_multicatch);
  
  		zend_compile_stmt(stmt_ast);
  
  		if (!is_last_catch) {
  			jmp_opnums[i + 1] = zend_emit_jump(0);
  		}
  
  		opline = &CG(active_op_array)->opcodes[opnum_catch];
  		if (!is_last_catch) {
  			opline->op2.opline_num = get_next_op_number();
  		}
  	}
  
  	for (i = 0; i < catches->children; ++i) {
  		zend_update_jump_target_to_next(jmp_opnums[i]);
  	}
  
  	if (finally_ast) {
  		zend_loop_var discard_exception;
  		uint32_t opnum_jmp = get_next_op_number() + 1;
  
  		/* Pop FAST_CALL from unwind stack */
  		zend_stack_del_top(&CG(loop_var_stack));
  
  		/* Push DISCARD_EXCEPTION on unwind stack */
  		discard_exception.opcode = ZEND_DISCARD_EXCEPTION;
  		discard_exception.var_type = IS_TMP_VAR;
  		discard_exception.var_num = CG(context).fast_call_var;
  		zend_stack_push(&CG(loop_var_stack), &discard_exception);
  
  		CG(zend_lineno) = finally_ast->lineno;
  
  		opline = zend_emit_op(NULL, ZEND_FAST_CALL, NULL, NULL);
  		opline->op1.num = try_catch_offset;
  		opline->result_type = IS_TMP_VAR;
  		opline->result.var = CG(context).fast_call_var;
  
  		zend_emit_op(NULL, ZEND_JMP, NULL, NULL);
  
  		zend_compile_stmt(finally_ast);
  
  		CG(active_op_array)->try_catch_array[try_catch_offset].finally_op = opnum_jmp + 1;
  		CG(active_op_array)->try_catch_array[try_catch_offset].finally_end
  			= get_next_op_number();
  
  		opline = zend_emit_op(NULL, ZEND_FAST_RET, NULL, NULL);
  		opline->op1_type = IS_TMP_VAR;
  		opline->op1.var = CG(context).fast_call_var;
  		opline->op2.num = orig_try_catch_offset;
  
  		zend_update_jump_target_to_next(opnum_jmp);
  
  		CG(context).fast_call_var = orig_fast_call_var;
  
  		/* Pop DISCARD_EXCEPTION from unwind stack */
  		zend_stack_del_top(&CG(loop_var_stack));
  	}
  
  	CG(context).try_catch_offset = orig_try_catch_offset;
  
  	efree(jmp_opnums);
  }
  /* }}} */
  
  /* Encoding declarations must already be handled during parsing */
  zend_bool zend_handle_encoding_declaration(zend_ast *ast) /* {{{ */
  {
  	zend_ast_list *declares = zend_ast_get_list(ast);
  	uint32_t i;
  	for (i = 0; i < declares->children; ++i) {
  		zend_ast *declare_ast = declares->child[i];
  		zend_ast *name_ast = declare_ast->child[0];
  		zend_ast *value_ast = declare_ast->child[1];
  		zend_string *name = zend_ast_get_str(name_ast);
  
  		if (zend_string_equals_literal_ci(name, "encoding")) {
  			if (value_ast->kind != ZEND_AST_ZVAL) {
  				zend_throw_exception(zend_ce_compile_error, "Encoding must be a literal", 0);
  				return 0;
  			}
  
  			if (CG(multibyte)) {
  				zend_string *encoding_name = zval_get_string(zend_ast_get_zval(value_ast));
  
  				const zend_encoding *new_encoding, *old_encoding;
  				zend_encoding_filter old_input_filter;
  
  				CG(encoding_declared) = 1;
  
  				new_encoding = zend_multibyte_fetch_encoding(ZSTR_VAL(encoding_name));
  				if (!new_encoding) {
  					zend_error(E_COMPILE_WARNING, "Unsupported encoding [%s]", ZSTR_VAL(encoding_name));
  				} else {
  					old_input_filter = LANG_SCNG(input_filter);
  					old_encoding = LANG_SCNG(script_encoding);
  					zend_multibyte_set_filter(new_encoding);
  
  					/* need to re-scan if input filter changed */
  					if (old_input_filter != LANG_SCNG(input_filter) ||
  						 (old_input_filter && new_encoding != old_encoding)) {
  						zend_multibyte_yyinput_again(old_input_filter, old_encoding);
  					}
  				}
  
  				zend_string_release_ex(encoding_name, 0);
  			} else {
  				zend_error(E_COMPILE_WARNING, "declare(encoding=...) ignored because "
  					"Zend multibyte feature is turned off by settings");
  			}
  		}
  	}
  
  	return 1;
  }
  /* }}} */
  
  static int zend_declare_is_first_statement(zend_ast *ast) /* {{{ */
  {
  	uint32_t i = 0;
  	zend_ast_list *file_ast = zend_ast_get_list(CG(ast));
  
  	/* Check to see if this declare is preceded only by declare statements */
  	while (i < file_ast->children) {
  		if (file_ast->child[i] == ast) {
  			return SUCCESS;
  		} else if (file_ast->child[i] == NULL) {
  			/* Empty statements are not allowed prior to a declare */
  			return FAILURE;
  		} else if (file_ast->child[i]->kind != ZEND_AST_DECLARE) {
  			/* declares can only be preceded by other declares */
  			return FAILURE;
  		}
  		i++;
  	}
  	return FAILURE;
  }
  /* }}} */
  
  void zend_compile_declare(zend_ast *ast) /* {{{ */
  {
  	zend_ast_list *declares = zend_ast_get_list(ast->child[0]);
  	zend_ast *stmt_ast = ast->child[1];
  	zend_declarables orig_declarables = FC(declarables);
  	uint32_t i;
  
  	for (i = 0; i < declares->children; ++i) {
  		zend_ast *declare_ast = declares->child[i];
  		zend_ast *name_ast = declare_ast->child[0];
  		zend_ast *value_ast = declare_ast->child[1];
  		zend_string *name = zend_ast_get_str(name_ast);
  
  		if (value_ast->kind != ZEND_AST_ZVAL) {
  			zend_error_noreturn(E_COMPILE_ERROR, "declare(%s) value must be a literal", ZSTR_VAL(name));
  		}
  
  		if (zend_string_equals_literal_ci(name, "ticks")) {
  			zval value_zv;
  			zend_const_expr_to_zval(&value_zv, value_ast);
  			FC(declarables).ticks = zval_get_long(&value_zv);
  			zval_ptr_dtor_nogc(&value_zv);
  		} else if (zend_string_equals_literal_ci(name, "encoding")) {
  
  			if (FAILURE == zend_declare_is_first_statement(ast)) {
  				zend_error_noreturn(E_COMPILE_ERROR, "Encoding declaration pragma must be "
  					"the very first statement in the script");
  			}
  		} else if (zend_string_equals_literal_ci(name, "strict_types")) {
  			zval value_zv;
  
  			if (FAILURE == zend_declare_is_first_statement(ast)) {
  				zend_error_noreturn(E_COMPILE_ERROR, "strict_types declaration must be "
  					"the very first statement in the script");
  			}
  
  			if (ast->child[1] != NULL) {
  				zend_error_noreturn(E_COMPILE_ERROR, "strict_types declaration must not "
  					"use block mode");
  			}
  
  			zend_const_expr_to_zval(&value_zv, value_ast);
  
  			if (Z_TYPE(value_zv) != IS_LONG || (Z_LVAL(value_zv) != 0 && Z_LVAL(value_zv) != 1)) {
  				zend_error_noreturn(E_COMPILE_ERROR, "strict_types declaration must have 0 or 1 as its value");
  			}
  
  			if (Z_LVAL(value_zv) == 1) {
  				CG(active_op_array)->fn_flags |= ZEND_ACC_STRICT_TYPES;
  			}
  
  		} else {
  			zend_error(E_COMPILE_WARNING, "Unsupported declare '%s'", ZSTR_VAL(name));
  		}
  	}
  
  	if (stmt_ast) {
  		zend_compile_stmt(stmt_ast);
  
  		FC(declarables) = orig_declarables;
  	}
  }
  /* }}} */
  
  void zend_compile_stmt_list(zend_ast *ast) /* {{{ */
  {
  	zend_ast_list *list = zend_ast_get_list(ast);
  	uint32_t i;
  	for (i = 0; i < list->children; ++i) {
  		zend_compile_stmt(list->child[i]);
  	}
  }
  /* }}} */
  
  ZEND_API void zend_set_function_arg_flags(zend_function *func) /* {{{ */
  {
  	uint32_t i, n;
  
  	func->common.arg_flags[0] = 0;
  	func->common.arg_flags[1] = 0;
  	func->common.arg_flags[2] = 0;
  	if (func->common.arg_info) {
  		n = MIN(func->common.num_args, MAX_ARG_FLAG_NUM);
  		i = 0;
  		while (i < n) {
  			ZEND_SET_ARG_FLAG(func, i + 1, func->common.arg_info[i].pass_by_reference);
  			i++;
  		}
  		if (UNEXPECTED(func->common.fn_flags & ZEND_ACC_VARIADIC && func->common.arg_info[i].pass_by_reference)) {
  			uint32_t pass_by_reference = func->common.arg_info[i].pass_by_reference;
  			while (i < MAX_ARG_FLAG_NUM) {
  				ZEND_SET_ARG_FLAG(func, i + 1, pass_by_reference);
  				i++;
  			}
  		}
  	}
  }
  /* }}} */
  
  static zend_type zend_compile_typename(zend_ast *ast, zend_bool force_allow_null) /* {{{ */
  {
  	zend_bool allow_null = force_allow_null;
  	if (ast->attr & ZEND_TYPE_NULLABLE) {
  		allow_null = 1;
  		ast->attr &= ~ZEND_TYPE_NULLABLE;
  	}
  
  	if (ast->kind == ZEND_AST_TYPE) {
  		return ZEND_TYPE_ENCODE(ast->attr, allow_null);
  	} else {
  		zend_string *class_name = zend_ast_get_str(ast);
  		zend_uchar type = zend_lookup_builtin_type_by_name(class_name);
  
  		if (type != 0) {
  			if ((ast->attr & ZEND_NAME_NOT_FQ) != ZEND_NAME_NOT_FQ) {
  				zend_error_noreturn(E_COMPILE_ERROR,
  					"Type declaration '%s' must be unqualified",
  					ZSTR_VAL(zend_string_tolower(class_name)));
  			}
  			return ZEND_TYPE_ENCODE(type, allow_null);
  		} else {
  			uint32_t fetch_type = zend_get_class_fetch_type_ast(ast);
  			if (fetch_type == ZEND_FETCH_CLASS_DEFAULT) {
  				class_name = zend_resolve_class_name_ast(ast);
  				zend_assert_valid_class_name(class_name);
  			} else {
  				zend_ensure_valid_class_fetch_type(fetch_type);
  				zend_string_addref(class_name);
  			}
  
  			return ZEND_TYPE_ENCODE_CLASS(class_name, allow_null);
  		}
  	}
  }
  /* }}} */
  
  void zend_compile_params(zend_ast *ast, zend_ast *return_type_ast) /* {{{ */
  {
  	zend_ast_list *list = zend_ast_get_list(ast);
  	uint32_t i;
  	zend_op_array *op_array = CG(active_op_array);
  	zend_arg_info *arg_infos;
  
  	if (return_type_ast) {
  		/* Use op_array->arg_info[-1] for return type */
  		arg_infos = safe_emalloc(sizeof(zend_arg_info), list->children + 1, 0);
  		arg_infos->name = NULL;
  		arg_infos->pass_by_reference = (op_array->fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0;
  		arg_infos->is_variadic = 0;
  		arg_infos->type = zend_compile_typename(return_type_ast, 0);
  
  		if (ZEND_TYPE_CODE(arg_infos->type) == IS_VOID && ZEND_TYPE_ALLOW_NULL(arg_infos->type)) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Void type cannot be nullable");
  		}
  
  		arg_infos++;
  		op_array->fn_flags |= ZEND_ACC_HAS_RETURN_TYPE;
  	} else {
  		if (list->children == 0) {
  			return;
  		}
  		arg_infos = safe_emalloc(sizeof(zend_arg_info), list->children, 0);
  	}
  
  	for (i = 0; i < list->children; ++i) {
  		zend_ast *param_ast = list->child[i];
  		zend_ast *type_ast = param_ast->child[0];
  		zend_ast *var_ast = param_ast->child[1];
  		zend_ast *default_ast = param_ast->child[2];
  		zend_string *name = zval_make_interned_string(zend_ast_get_zval(var_ast));
  		zend_bool is_ref = (param_ast->attr & ZEND_PARAM_REF) != 0;
  		zend_bool is_variadic = (param_ast->attr & ZEND_PARAM_VARIADIC) != 0;
  
  		znode var_node, default_node;
  		zend_uchar opcode;
  		zend_op *opline;
  		zend_arg_info *arg_info;
  
  		if (zend_is_auto_global(name)) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign auto-global variable %s",
  				ZSTR_VAL(name));
  		}
  
  		var_node.op_type = IS_CV;
  		var_node.u.op.var = lookup_cv(name);
  
  		if (EX_VAR_TO_NUM(var_node.u.op.var) != i) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Redefinition of parameter $%s",
  				ZSTR_VAL(name));
  		} else if (zend_string_equals_literal(name, "this")) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use $this as parameter");
  		}
  
  		if (op_array->fn_flags & ZEND_ACC_VARIADIC) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Only the last parameter can be variadic");
  		}
  
  		if (is_variadic) {
  			opcode = ZEND_RECV_VARIADIC;
  			default_node.op_type = IS_UNUSED;
  			op_array->fn_flags |= ZEND_ACC_VARIADIC;
  
  			if (default_ast) {
  				zend_error_noreturn(E_COMPILE_ERROR,
  					"Variadic parameter cannot have a default value");
  			}
  		} else if (default_ast) {
  			/* we cannot substitute constants here or it will break ReflectionParameter::getDefaultValueConstantName() and ReflectionParameter::isDefaultValueConstant() */
  			uint32_t cops = CG(compiler_options);
  			CG(compiler_options) |= ZEND_COMPILE_NO_CONSTANT_SUBSTITUTION | ZEND_COMPILE_NO_PERSISTENT_CONSTANT_SUBSTITUTION;
  			opcode = ZEND_RECV_INIT;
  			default_node.op_type = IS_CONST;
  			zend_const_expr_to_zval(&default_node.u.constant, default_ast);
  			CG(compiler_options) = cops;
  		} else {
  			opcode = ZEND_RECV;
  			default_node.op_type = IS_UNUSED;
  			op_array->required_num_args = i + 1;
  		}
  
  		opline = zend_emit_op(NULL, opcode, NULL, &default_node);
  		SET_NODE(opline->result, &var_node);
  		opline->op1.num = i + 1;
  
  		arg_info = &arg_infos[i];
  		arg_info->name = zend_string_copy(name);
  		arg_info->pass_by_reference = is_ref;
  		arg_info->is_variadic = is_variadic;
  		/* TODO: Keep compatibility, but may be better reset "allow_null" ??? */
  		arg_info->type = ZEND_TYPE_ENCODE(0, 1);
  
  		if (type_ast) {
  			zend_bool has_null_default = default_ast
  				&& (Z_TYPE(default_node.u.constant) == IS_NULL
  					|| (Z_TYPE(default_node.u.constant) == IS_CONSTANT_AST
  						&& Z_ASTVAL(default_node.u.constant)->kind == ZEND_AST_CONSTANT
  						&& strcasecmp(ZSTR_VAL(zend_ast_get_constant_name(Z_ASTVAL(default_node.u.constant))), "NULL") == 0));
  
  			op_array->fn_flags |= ZEND_ACC_HAS_TYPE_HINTS;
  			arg_info->type = zend_compile_typename(type_ast, has_null_default);
  
  			if (ZEND_TYPE_CODE(arg_info->type) == IS_VOID) {
  				zend_error_noreturn(E_COMPILE_ERROR, "void cannot be used as a parameter type");
  			}
  
  			if (type_ast->kind == ZEND_AST_TYPE) {
  				if (ZEND_TYPE_CODE(arg_info->type) == IS_ARRAY) {
  					if (default_ast && !has_null_default
  						&& Z_TYPE(default_node.u.constant) != IS_ARRAY
  						&& Z_TYPE(default_node.u.constant) != IS_CONSTANT_AST
  					) {
  						zend_error_noreturn(E_COMPILE_ERROR, "Default value for parameters "
  							"with array type can only be an array or NULL");
  					}
  				} else if (ZEND_TYPE_CODE(arg_info->type) == IS_CALLABLE && default_ast) {
  					if (!has_null_default && Z_TYPE(default_node.u.constant) != IS_CONSTANT_AST) {
  						zend_error_noreturn(E_COMPILE_ERROR, "Default value for parameters "
  							"with callable type can only be NULL");
  					}
  				}
  			} else {
  				if (default_ast && !has_null_default && Z_TYPE(default_node.u.constant) != IS_CONSTANT_AST) {
  					if (ZEND_TYPE_IS_CLASS(arg_info->type)) {
  						zend_error_noreturn(E_COMPILE_ERROR, "Default value for parameters "
  							"with a class type can only be NULL");
  					} else switch (ZEND_TYPE_CODE(arg_info->type)) {
  						case IS_DOUBLE:
  							if (Z_TYPE(default_node.u.constant) != IS_DOUBLE && Z_TYPE(default_node.u.constant) != IS_LONG) {
  								zend_error_noreturn(E_COMPILE_ERROR, "Default value for parameters "
  									"with a float type can only be float, integer, or NULL");
  							}
  							break;
  
  						case IS_ITERABLE:
  							if (Z_TYPE(default_node.u.constant) != IS_ARRAY) {
  								zend_error_noreturn(E_COMPILE_ERROR, "Default value for parameters "
  									"with iterable type can only be an array or NULL");
  							}
  							break;
  
  						case IS_OBJECT:
  							zend_error_noreturn(E_COMPILE_ERROR, "Default value for parameters "
  								"with an object type can only be NULL");
  							break;
  
  						default:
  							if (!ZEND_SAME_FAKE_TYPE(ZEND_TYPE_CODE(arg_info->type), Z_TYPE(default_node.u.constant))) {
  								zend_error_noreturn(E_COMPILE_ERROR, "Default value for parameters "
  									"with a %s type can only be %s or NULL",
  									zend_get_type_by_const(ZEND_TYPE_CODE(arg_info->type)), zend_get_type_by_const(ZEND_TYPE_CODE(arg_info->type)));
  							}
  							break;
  					}
  				}
  			}
  
  			/* Allocate cache slot to speed-up run-time class resolution */
  			if (opline->opcode == ZEND_RECV_INIT) {
  				if (ZEND_TYPE_IS_CLASS(arg_info->type)) {
  					opline->extended_value = zend_alloc_cache_slot();
  				}
  			} else {
  				if (ZEND_TYPE_IS_CLASS(arg_info->type)) {
  					opline->op2.num = op_array->cache_size;
  					op_array->cache_size += sizeof(void*);
  				} else {
  					opline->op2.num = -1;
  				}
  			}
  		} else {
  			if (opline->opcode != ZEND_RECV_INIT) {
  				opline->op2.num = -1;
  			}
  		}
  	}
  
  	/* These are assigned at the end to avoid uninitialized memory in case of an error */
  	op_array->num_args = list->children;
  	op_array->arg_info = arg_infos;
  
  	/* Don't count the variadic argument */
  	if (op_array->fn_flags & ZEND_ACC_VARIADIC) {
  		op_array->num_args--;
  	}
  	zend_set_function_arg_flags((zend_function*)op_array);
  }
  /* }}} */
  
  static void zend_compile_closure_binding(znode *closure, zend_op_array *op_array, zend_ast *uses_ast) /* {{{ */
  {
  	zend_ast_list *list = zend_ast_get_list(uses_ast);
  	uint32_t i;
  
  	if (!list->children) {
  		return;
  	}
  
  	if (!op_array->static_variables) {
  		op_array->static_variables = zend_new_array(8);
  	}
  
  	for (i = 0; i < list->children; ++i) {
  		zend_ast *var_name_ast = list->child[i];
  		zend_string *var_name = zval_make_interned_string(zend_ast_get_zval(var_name_ast));
  		uint32_t by_ref = var_name_ast->attr;
  		zend_op *opline;
  		zval *value;
  
  		if (zend_string_equals_literal(var_name, "this")) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use $this as lexical variable");
  		}
  
  		if (zend_is_auto_global(var_name)) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use auto-global as lexical variable");
  		}
  
  		value = zend_hash_add(op_array->static_variables, var_name, &EG(uninitialized_zval));
  		if (!value) {
  			zend_error_noreturn(E_COMPILE_ERROR,
  				"Cannot use variable $%s twice", ZSTR_VAL(var_name));
  		}
  
  		opline = zend_emit_op(NULL, ZEND_BIND_LEXICAL, closure, NULL);
  		opline->op2_type = IS_CV;
  		opline->op2.var = lookup_cv(var_name);
  		opline->extended_value = (uint32_t)((char*)value - (char*)op_array->static_variables->arData) | by_ref;
  	}
  }
  /* }}} */
  
  void zend_compile_closure_uses(zend_ast *ast) /* {{{ */
  {
  	zend_op_array *op_array = CG(active_op_array);
  	zend_ast_list *list = zend_ast_get_list(ast);
  	uint32_t i;
  
  	for (i = 0; i < list->children; ++i) {
  		zend_ast *var_ast = list->child[i];
  		zend_string *var_name = zend_ast_get_str(var_ast);
  		uint32_t by_ref = var_ast->attr;
  		zval zv;
  		ZVAL_NULL(&zv);
  
  		{
  			int i;
  			for (i = 0; i < op_array->last_var; i++) {
  				if (zend_string_equals(op_array->vars[i], var_name)) {
  					zend_error_noreturn(E_COMPILE_ERROR,
  						"Cannot use lexical variable $%s as a parameter name", ZSTR_VAL(var_name));
  				}
  			}
  		}
  
  		zend_compile_static_var_common(var_ast, &zv, by_ref);
  	}
  }
  /* }}} */
  
  void zend_begin_method_decl(zend_op_array *op_array, zend_string *name, zend_bool has_body) /* {{{ */
  {
  	zend_class_entry *ce = CG(active_class_entry);
  	zend_bool in_interface = (ce->ce_flags & ZEND_ACC_INTERFACE) != 0;
  	zend_bool is_public = (op_array->fn_flags & ZEND_ACC_PUBLIC) != 0;
  	zend_bool is_static = (op_array->fn_flags & ZEND_ACC_STATIC) != 0;
  
  	zend_string *lcname;
  
  	if (in_interface) {
  		if (!is_public || (op_array->fn_flags & (ZEND_ACC_FINAL|ZEND_ACC_ABSTRACT))) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Access type for interface method "
  				"%s::%s() must be omitted", ZSTR_VAL(ce->name), ZSTR_VAL(name));
  		}
  		op_array->fn_flags |= ZEND_ACC_ABSTRACT;
  	}
  
  	if (op_array->fn_flags & ZEND_ACC_ABSTRACT) {
  		if (op_array->fn_flags & ZEND_ACC_PRIVATE) {
  			zend_error_noreturn(E_COMPILE_ERROR, "%s function %s::%s() cannot be declared private",
  				in_interface ? "Interface" : "Abstract", ZSTR_VAL(ce->name), ZSTR_VAL(name));
  		}
  
  		if (has_body) {
  			zend_error_noreturn(E_COMPILE_ERROR, "%s function %s::%s() cannot contain body",
  				in_interface ? "Interface" : "Abstract", ZSTR_VAL(ce->name), ZSTR_VAL(name));
  		}
  
  		ce->ce_flags |= ZEND_ACC_IMPLICIT_ABSTRACT_CLASS;
  	} else if (!has_body) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Non-abstract method %s::%s() must contain body",
  			ZSTR_VAL(ce->name), ZSTR_VAL(name));
  	}
  
  	op_array->scope = ce;
  	op_array->function_name = zend_string_copy(name);
  
  	lcname = zend_string_tolower(name);
  	lcname = zend_new_interned_string(lcname);
  
  	if (zend_hash_add_ptr(&ce->function_table, lcname, op_array) == NULL) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot redeclare %s::%s()",
  			ZSTR_VAL(ce->name), ZSTR_VAL(name));
  	}
  
  	if (in_interface) {
  		if (ZSTR_VAL(lcname)[0] != '_' || ZSTR_VAL(lcname)[1] != '_') {
  			/* pass */
  		} else if (zend_string_equals_literal(lcname, ZEND_CALL_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __call() must have "
  					"public visibility and cannot be static");
  			}
  		} else if (zend_string_equals_literal(lcname, ZEND_CALLSTATIC_FUNC_NAME)) {
  			if (!is_public || !is_static) {
  				zend_error(E_WARNING, "The magic method __callStatic() must have "
  					"public visibility and be static");
  			}
  		} else if (zend_string_equals_literal(lcname, ZEND_GET_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __get() must have "
  					"public visibility and cannot be static");
  			}
  		} else if (zend_string_equals_literal(lcname, ZEND_SET_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __set() must have "
  					"public visibility and cannot be static");
  			}
  		} else if (zend_string_equals_literal(lcname, ZEND_UNSET_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __unset() must have "
  					"public visibility and cannot be static");
  			}
  		} else if (zend_string_equals_literal(lcname, ZEND_ISSET_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __isset() must have "
  					"public visibility and cannot be static");
  			}
  		} else if (zend_string_equals_literal(lcname, ZEND_TOSTRING_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __toString() must have "
  					"public visibility and cannot be static");
  			}
  		} else if (zend_string_equals_literal(lcname, ZEND_INVOKE_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __invoke() must have "
  					"public visibility and cannot be static");
  			}
  		} else if (zend_string_equals_literal(lcname, ZEND_DEBUGINFO_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __debugInfo() must have "
  					"public visibility and cannot be static");
  			}
  		}
  	} else {
  		if (zend_string_equals_literal(lcname, "serialize")) {
  			ce->serialize_func = (zend_function *) op_array;
  		} else if (zend_string_equals_literal(lcname, "unserialize")) {
  			ce->unserialize_func = (zend_function *) op_array;
  		} else if (ZSTR_VAL(lcname)[0] != '_' || ZSTR_VAL(lcname)[1] != '_') {
  			/* pass */
  		} else if (zend_string_equals_literal(lcname, ZEND_CONSTRUCTOR_FUNC_NAME)) {
  			ce->constructor = (zend_function *) op_array;
  		} else if (zend_string_equals_literal(lcname, ZEND_DESTRUCTOR_FUNC_NAME)) {
  			ce->destructor = (zend_function *) op_array;
  		} else if (zend_string_equals_literal(lcname, ZEND_CLONE_FUNC_NAME)) {
  			ce->clone = (zend_function *) op_array;
  		} else if (zend_string_equals_literal(lcname, ZEND_CALL_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __call() must have "
  					"public visibility and cannot be static");
  			}
  			ce->__call = (zend_function *) op_array;
  		} else if (zend_string_equals_literal(lcname, ZEND_CALLSTATIC_FUNC_NAME)) {
  			if (!is_public || !is_static) {
  				zend_error(E_WARNING, "The magic method __callStatic() must have "
  					"public visibility and be static");
  			}
  			ce->__callstatic = (zend_function *) op_array;
  		} else if (zend_string_equals_literal(lcname, ZEND_GET_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __get() must have "
  					"public visibility and cannot be static");
  			}
  			ce->__get = (zend_function *) op_array;
  			ce->ce_flags |= ZEND_ACC_USE_GUARDS;
  		} else if (zend_string_equals_literal(lcname, ZEND_SET_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __set() must have "
  					"public visibility and cannot be static");
  			}
  			ce->__set = (zend_function *) op_array;
  			ce->ce_flags |= ZEND_ACC_USE_GUARDS;
  		} else if (zend_string_equals_literal(lcname, ZEND_UNSET_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __unset() must have "
  					"public visibility and cannot be static");
  			}
  			ce->__unset = (zend_function *) op_array;
  			ce->ce_flags |= ZEND_ACC_USE_GUARDS;
  		} else if (zend_string_equals_literal(lcname, ZEND_ISSET_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __isset() must have "
  					"public visibility and cannot be static");
  			}
  			ce->__isset = (zend_function *) op_array;
  			ce->ce_flags |= ZEND_ACC_USE_GUARDS;
  		} else if (zend_string_equals_literal(lcname, ZEND_TOSTRING_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __toString() must have "
  					"public visibility and cannot be static");
  			}
  			ce->__tostring = (zend_function *) op_array;
  		} else if (zend_string_equals_literal(lcname, ZEND_INVOKE_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __invoke() must have "
  					"public visibility and cannot be static");
  			}
  		} else if (zend_string_equals_literal(lcname, ZEND_DEBUGINFO_FUNC_NAME)) {
  			if (!is_public || is_static) {
  				zend_error(E_WARNING, "The magic method __debugInfo() must have "
  					"public visibility and cannot be static");
  			}
  			ce->__debugInfo = (zend_function *) op_array;
  		}
  	}
  
  	zend_string_release_ex(lcname, 0);
  }
  /* }}} */
  
  static void zend_begin_func_decl(znode *result, zend_op_array *op_array, zend_ast_decl *decl, zend_bool toplevel) /* {{{ */
  {
  	zend_string *unqualified_name, *name, *lcname, *key;
  	zend_op *opline;
  
  	unqualified_name = decl->name;
  	op_array->function_name = name = zend_prefix_with_ns(unqualified_name);
  	lcname = zend_string_tolower(name);
  
  	if (FC(imports_function)) {
  		zend_string *import_name = zend_hash_find_ptr_lc(
  			FC(imports_function), ZSTR_VAL(unqualified_name), ZSTR_LEN(unqualified_name));
  		if (import_name && !zend_string_equals_ci(lcname, import_name)) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare function %s "
  				"because the name is already in use", ZSTR_VAL(name));
  		}
  	}
  
  	if (zend_string_equals_literal(lcname, "__autoload")) {
  		zend_error_noreturn(E_COMPILE_ERROR,
  			"__autoload() is no longer supported, use spl_autoload_register() instead");
  	}
  
  	if (zend_string_equals_literal_ci(unqualified_name, "assert")) {
  		zend_error(E_COMPILE_ERROR,
  			"Defining a custom assert() function is not allowed, "
  			"as the function has special semantics");
  	}
  
  	zend_register_seen_symbol(lcname, ZEND_SYMBOL_FUNCTION);
  	if (toplevel) {
  		if (UNEXPECTED(zend_hash_add_ptr(CG(function_table), lcname, op_array) == NULL)) {
  			do_bind_function_error(lcname, op_array, 1);
  		}
  		zend_string_release_ex(lcname, 0);
  		return;
  	}
  
  	key = zend_build_runtime_definition_key(lcname, decl->lex_pos);
  	zend_hash_update_ptr(CG(function_table), key, op_array);
  
  	if (op_array->fn_flags & ZEND_ACC_CLOSURE) {
  		opline = zend_emit_op_tmp(result, ZEND_DECLARE_LAMBDA_FUNCTION, NULL, NULL);
  		opline->op1_type = IS_CONST;
  		LITERAL_STR(opline->op1, key);
  	} else {
  		opline = get_next_op();
  		opline->opcode = ZEND_DECLARE_FUNCTION;
  		opline->op1_type = IS_CONST;
  		LITERAL_STR(opline->op1, zend_string_copy(lcname));
  		/* RTD key is placed after lcname literal in op1 */
  		zend_add_literal_string(&key);
  	}
  	zend_string_release_ex(lcname, 0);
  }
  /* }}} */
  
  void zend_compile_func_decl(znode *result, zend_ast *ast, zend_bool toplevel) /* {{{ */
  {
  	zend_ast_decl *decl = (zend_ast_decl *) ast;
  	zend_ast *params_ast = decl->child[0];
  	zend_ast *uses_ast = decl->child[1];
  	zend_ast *stmt_ast = decl->child[2];
  	zend_ast *return_type_ast = decl->child[3];
  	zend_bool is_method = decl->kind == ZEND_AST_METHOD;
  
  	zend_class_entry *orig_class_entry = CG(active_class_entry);
  	zend_op_array *orig_op_array = CG(active_op_array);
  	zend_op_array *op_array = zend_arena_alloc(&CG(arena), sizeof(zend_op_array));
  	zend_oparray_context orig_oparray_context;
  
  	init_op_array(op_array, ZEND_USER_FUNCTION, INITIAL_OP_ARRAY_SIZE);
  
  	ZEND_MAP_PTR_INIT(op_array->run_time_cache, zend_arena_alloc(&CG(arena), sizeof(void*)));
  	ZEND_MAP_PTR_SET(op_array->run_time_cache, NULL);
  
  	op_array->fn_flags |= (orig_op_array->fn_flags & ZEND_ACC_STRICT_TYPES);
  	op_array->fn_flags |= decl->flags;
  	op_array->line_start = decl->start_lineno;
  	op_array->line_end = decl->end_lineno;
  	if (decl->doc_comment) {
  		op_array->doc_comment = zend_string_copy(decl->doc_comment);
  	}
  	if (decl->kind == ZEND_AST_CLOSURE) {
  		op_array->fn_flags |= ZEND_ACC_CLOSURE;
  	}
  
  	if (is_method) {
  		zend_bool has_body = stmt_ast != NULL;
  		zend_begin_method_decl(op_array, decl->name, has_body);
  	} else {
  		zend_begin_func_decl(result, op_array, decl, toplevel);
  		if (uses_ast) {
  			zend_compile_closure_binding(result, op_array, uses_ast);
  		}
  	}
  
  	CG(active_op_array) = op_array;
  
  	/* Do not leak the class scope into free standing functions, even if they are dynamically
  	 * defined inside a class method. This is necessary for correct handling of magic constants.
  	 * For example __CLASS__ should always be "" inside a free standing function. */
  	if (decl->kind == ZEND_AST_FUNC_DECL) {
  		CG(active_class_entry) = NULL;
  	}
  
  	if (toplevel) {
  		op_array->fn_flags |= ZEND_ACC_TOP_LEVEL;
  	}
  
  	zend_oparray_context_begin(&orig_oparray_context);
  
  	if (CG(compiler_options) & ZEND_COMPILE_EXTENDED_STMT) {
  		zend_op *opline_ext = zend_emit_op(NULL, ZEND_EXT_NOP, NULL, NULL);
  		opline_ext->lineno = decl->start_lineno;
  	}
  
  	{
  		/* Push a separator to the loop variable stack */
  		zend_loop_var dummy_var;
  		dummy_var.opcode = ZEND_RETURN;
  
  		zend_stack_push(&CG(loop_var_stack), (void *) &dummy_var);
  	}
  
  	zend_compile_params(params_ast, return_type_ast);
  	if (CG(active_op_array)->fn_flags & ZEND_ACC_GENERATOR) {
  		zend_mark_function_as_generator();
  		zend_emit_op(NULL, ZEND_GENERATOR_CREATE, NULL, NULL);
  	}
  	if (uses_ast) {
  		zend_compile_closure_uses(uses_ast);
  	}
  	zend_compile_stmt(stmt_ast);
  
  	if (is_method) {
  		zend_check_magic_method_implementation(
  			CG(active_class_entry), (zend_function *) op_array, E_COMPILE_ERROR);
  	}
  
  	/* put the implicit return on the really last line */
  	CG(zend_lineno) = decl->end_lineno;
  
  	zend_do_extended_stmt();
  	zend_emit_final_return(0);
  
  	pass_two(CG(active_op_array));
  	zend_oparray_context_end(&orig_oparray_context);
  
  	/* Pop the loop variable stack separator */
  	zend_stack_del_top(&CG(loop_var_stack));
  
  	CG(active_op_array) = orig_op_array;
  	CG(active_class_entry) = orig_class_entry;
  }
  /* }}} */
  
  void zend_compile_prop_decl(zend_ast *ast, zend_ast *type_ast, uint32_t flags) /* {{{ */
  {
  	zend_ast_list *list = zend_ast_get_list(ast);
  	zend_class_entry *ce = CG(active_class_entry);
  	uint32_t i, children = list->children;
  
  	if (ce->ce_flags & ZEND_ACC_INTERFACE) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Interfaces may not include member variables");
  	}
  
  	if (flags & ZEND_ACC_ABSTRACT) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Properties cannot be declared abstract");
  	}
  
  	for (i = 0; i < children; ++i) {
  		zend_ast *prop_ast = list->child[i];
  		zend_ast *name_ast = prop_ast->child[0];
  		zend_ast *value_ast = prop_ast->child[1];
  		zend_ast *doc_comment_ast = prop_ast->child[2];
  		zend_string *name = zval_make_interned_string(zend_ast_get_zval(name_ast));
  		zend_string *doc_comment = NULL;
  		zval value_zv;
  		zend_type type = 0;
  
  		if (type_ast) {
  			type = zend_compile_typename(type_ast, 0);
  
  			if (ZEND_TYPE_CODE(type) == IS_VOID || ZEND_TYPE_CODE(type) == IS_CALLABLE) {
  				zend_error_noreturn(E_COMPILE_ERROR,
  					"Property %s::$%s cannot have type %s",
  					ZSTR_VAL(ce->name),
  					ZSTR_VAL(name),
  					zend_get_type_by_const(ZEND_TYPE_CODE(type)));
  			}
  		}
  
  		/* Doc comment has been appended as last element in ZEND_AST_PROP_ELEM ast */
  		if (doc_comment_ast) {
  			doc_comment = zend_string_copy(zend_ast_get_str(doc_comment_ast));
  		}
  
  		if (flags & ZEND_ACC_FINAL) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare property %s::$%s final, "
  				"the final modifier is allowed only for methods and classes",
  				ZSTR_VAL(ce->name), ZSTR_VAL(name));
  		}
  
  		if (zend_hash_exists(&ce->properties_info, name)) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot redeclare %s::$%s",
  				ZSTR_VAL(ce->name), ZSTR_VAL(name));
  		}
  
  		if (value_ast) {
  			zend_const_expr_to_zval(&value_zv, value_ast);
  
  			if (ZEND_TYPE_IS_SET(type) && !Z_CONSTANT(value_zv)) {
  				if (Z_TYPE(value_zv) == IS_NULL) {
  					if (!ZEND_TYPE_ALLOW_NULL(type)) {
  						const char *name = ZEND_TYPE_IS_CLASS(type)
  							? ZSTR_VAL(ZEND_TYPE_NAME(type)) : zend_get_type_by_const(ZEND_TYPE_CODE(type));
  						zend_error_noreturn(E_COMPILE_ERROR,
  								"Default value for property of type %s may not be null. "
  								"Use the nullable type ?%s to allow null default value",
  								name, name);
  					}
  				} else if (ZEND_TYPE_IS_CLASS(type)) {
  					zend_error_noreturn(E_COMPILE_ERROR,
  							"Property of type %s may not have default value", ZSTR_VAL(ZEND_TYPE_NAME(type)));
  				} else if (ZEND_TYPE_CODE(type) == IS_ARRAY || ZEND_TYPE_CODE(type) == IS_ITERABLE) {
  					if (Z_TYPE(value_zv) != IS_ARRAY) {
  						zend_error_noreturn(E_COMPILE_ERROR,
  								"Default value for property of type %s can only be an array",
  								zend_get_type_by_const(ZEND_TYPE_CODE(type)));
  					}
  				} else if (ZEND_TYPE_CODE(type) == IS_DOUBLE) {
  					if (Z_TYPE(value_zv) != IS_DOUBLE && Z_TYPE(value_zv) != IS_LONG) {
  						zend_error_noreturn(E_COMPILE_ERROR,
  								"Default value for property of type float can only be float or int");
  					}
  				} else if (!ZEND_SAME_FAKE_TYPE(ZEND_TYPE_CODE(type), Z_TYPE(value_zv))) {
  					zend_error_noreturn(E_COMPILE_ERROR,
  							"Default value for property of type %s can only be %s",
  							zend_get_type_by_const(ZEND_TYPE_CODE(type)),
  							zend_get_type_by_const(ZEND_TYPE_CODE(type)));
  				}
  			}
  		} else if (!ZEND_TYPE_IS_SET(type)) {
  			ZVAL_NULL(&value_zv);
  		} else {
  			ZVAL_UNDEF(&value_zv);
  		}
  
  		zend_declare_typed_property(ce, name, &value_zv, flags, doc_comment, type);
  	}
  }
  /* }}} */
  
  void zend_compile_prop_group(zend_ast *list) /* {{{ */
  {
  	zend_ast *type_ast = list->child[0];
  	zend_ast *prop_ast = list->child[1];
  
  	zend_compile_prop_decl(prop_ast, type_ast, list->attr);
  }
  /* }}} */
  
  void zend_compile_class_const_decl(zend_ast *ast) /* {{{ */
  {
  	zend_ast_list *list = zend_ast_get_list(ast);
  	zend_class_entry *ce = CG(active_class_entry);
  	uint32_t i;
  
  	if ((ce->ce_flags & ZEND_ACC_TRAIT) != 0) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Traits cannot have constants");
  		return;
  	}
  
  	for (i = 0; i < list->children; ++i) {
  		zend_ast *const_ast = list->child[i];
  		zend_ast *name_ast = const_ast->child[0];
  		zend_ast *value_ast = const_ast->child[1];
  		zend_ast *doc_comment_ast = const_ast->child[2];
  		zend_string *name = zval_make_interned_string(zend_ast_get_zval(name_ast));
  		zend_string *doc_comment = doc_comment_ast ? zend_string_copy(zend_ast_get_str(doc_comment_ast)) : NULL;
  		zval value_zv;
  
  		if (UNEXPECTED(ast->attr & (ZEND_ACC_STATIC|ZEND_ACC_ABSTRACT|ZEND_ACC_FINAL))) {
  			if (ast->attr & ZEND_ACC_STATIC) {
  				zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'static' as constant modifier");
  			} else if (ast->attr & ZEND_ACC_ABSTRACT) {
  				zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'abstract' as constant modifier");
  			} else if (ast->attr & ZEND_ACC_FINAL) {
  				zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'final' as constant modifier");
  			}
  		}
  
  		zend_const_expr_to_zval(&value_zv, value_ast);
  		zend_declare_class_constant_ex(ce, name, &value_zv, ast->attr, doc_comment);
  	}
  }
  /* }}} */
  
  static void zend_compile_method_ref(zend_ast *ast, zend_trait_method_reference *method_ref) /* {{{ */
  {
  	zend_ast *class_ast = ast->child[0];
  	zend_ast *method_ast = ast->child[1];
  
  	method_ref->method_name = zend_string_copy(zend_ast_get_str(method_ast));
  
  	if (class_ast) {
  		method_ref->class_name = zend_resolve_class_name_ast(class_ast);
  	} else {
  		method_ref->class_name = NULL;
  	}
  }
  /* }}} */
  
  static void zend_compile_trait_precedence(zend_ast *ast) /* {{{ */
  {
  	zend_ast *method_ref_ast = ast->child[0];
  	zend_ast *insteadof_ast = ast->child[1];
  	zend_ast_list *insteadof_list = zend_ast_get_list(insteadof_ast);
  	uint32_t i;
  
  	zend_trait_precedence *precedence = emalloc(sizeof(zend_trait_precedence) + (insteadof_list->children - 1) * sizeof(zend_string*));
  	zend_compile_method_ref(method_ref_ast, &precedence->trait_method);
  	precedence->num_excludes = insteadof_list->children;
  
  	for (i = 0; i < insteadof_list->children; ++i) {
  		zend_ast *name_ast = insteadof_list->child[i];
  		precedence->exclude_class_names[i] = zend_resolve_class_name_ast(name_ast);
  	}
  
  	zend_add_to_list(&CG(active_class_entry)->trait_precedences, precedence);
  }
  /* }}} */
  
  static void zend_compile_trait_alias(zend_ast *ast) /* {{{ */
  {
  	zend_ast *method_ref_ast = ast->child[0];
  	zend_ast *alias_ast = ast->child[1];
  	uint32_t modifiers = ast->attr;
  
  	zend_trait_alias *alias;
  
  	if (modifiers == ZEND_ACC_STATIC) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'static' as method modifier");
  	} else if (modifiers == ZEND_ACC_ABSTRACT) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'abstract' as method modifier");
  	} else if (modifiers == ZEND_ACC_FINAL) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'final' as method modifier");
  	}
  
  	alias = emalloc(sizeof(zend_trait_alias));
  	zend_compile_method_ref(method_ref_ast, &alias->trait_method);
  	alias->modifiers = modifiers;
  
  	if (alias_ast) {
  		alias->alias = zend_string_copy(zend_ast_get_str(alias_ast));
  	} else {
  		alias->alias = NULL;
  	}
  
  	zend_add_to_list(&CG(active_class_entry)->trait_aliases, alias);
  }
  /* }}} */
  
  void zend_compile_use_trait(zend_ast *ast) /* {{{ */
  {
  	zend_ast_list *traits = zend_ast_get_list(ast->child[0]);
  	zend_ast_list *adaptations = ast->child[1] ? zend_ast_get_list(ast->child[1]) : NULL;
  	zend_class_entry *ce = CG(active_class_entry);
  	uint32_t i;
  
  	ce->ce_flags |= ZEND_ACC_IMPLEMENT_TRAITS;
  	ce->trait_names = erealloc(ce->trait_names, sizeof(zend_class_name) * (ce->num_traits + traits->children));
  
  	for (i = 0; i < traits->children; ++i) {
  		zend_ast *trait_ast = traits->child[i];
  		zend_string *name = zend_ast_get_str(trait_ast);
  
  		if (ce->ce_flags & ZEND_ACC_INTERFACE) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use traits inside of interfaces. "
  				"%s is used in %s", ZSTR_VAL(name), ZSTR_VAL(ce->name));
  		}
  
  		switch (zend_get_class_fetch_type(name)) {
  			case ZEND_FETCH_CLASS_SELF:
  			case ZEND_FETCH_CLASS_PARENT:
  			case ZEND_FETCH_CLASS_STATIC:
  				zend_error_noreturn(E_COMPILE_ERROR, "Cannot use '%s' as trait name "
  					"as it is reserved", ZSTR_VAL(name));
  				break;
  		}
  
  		ce->trait_names[ce->num_traits].name = zend_resolve_class_name_ast(trait_ast);
  		ce->trait_names[ce->num_traits].lc_name = zend_string_tolower(ce->trait_names[ce->num_traits].name);
  		ce->num_traits++;
  	}
  
  	if (!adaptations) {
  		return;
  	}
  
  	for (i = 0; i < adaptations->children; ++i) {
  		zend_ast *adaptation_ast = adaptations->child[i];
  		switch (adaptation_ast->kind) {
  			case ZEND_AST_TRAIT_PRECEDENCE:
  				zend_compile_trait_precedence(adaptation_ast);
  				break;
  			case ZEND_AST_TRAIT_ALIAS:
  				zend_compile_trait_alias(adaptation_ast);
  				break;
  			EMPTY_SWITCH_DEFAULT_CASE()
  		}
  	}
  }
  /* }}} */
  
  void zend_compile_implements(zend_ast *ast) /* {{{ */
  {
  	zend_ast_list *list = zend_ast_get_list(ast);
  	zend_class_entry *ce = CG(active_class_entry);
  	zend_class_name *interface_names;
  	uint32_t i;
  
  	interface_names = emalloc(sizeof(zend_class_name) * list->children);
  
  	for (i = 0; i < list->children; ++i) {
  		zend_ast *class_ast = list->child[i];
  		zend_string *name = zend_ast_get_str(class_ast);
  
  		if (!zend_is_const_default_class_ref(class_ast)) {
  			efree(interface_names);
  			zend_error_noreturn(E_COMPILE_ERROR,
  				"Cannot use '%s' as interface name as it is reserved", ZSTR_VAL(name));
  		}
  
  		interface_names[i].name = zend_resolve_class_name_ast(class_ast);
  		interface_names[i].lc_name = zend_string_tolower(interface_names[i].name);
  	}
  
  	ce->ce_flags |= ZEND_ACC_IMPLEMENT_INTERFACES;
  	ce->num_interfaces = list->children;
  	ce->interface_names = interface_names;
  }
  /* }}} */
  
  static zend_string *zend_generate_anon_class_name(unsigned char *lex_pos) /* {{{ */
  {
  	zend_string *result;
  	char char_pos_buf[32];
  	size_t char_pos_len = sprintf(char_pos_buf, "%p", lex_pos);
  	zend_string *filename = CG(active_op_array)->filename;
  
  	/* NULL, name length, filename length, last accepting char position length */
  	result = zend_string_alloc(sizeof("class@anonymous") + ZSTR_LEN(filename) + char_pos_len, 0);
  	sprintf(ZSTR_VAL(result), "class@anonymous%c%s%s", '\0', ZSTR_VAL(filename), char_pos_buf);
  	return zend_new_interned_string(result);
  }
  /* }}} */
  
  zend_op *zend_compile_class_decl(zend_ast *ast, zend_bool toplevel) /* {{{ */
  {
  	zend_ast_decl *decl = (zend_ast_decl *) ast;
  	zend_ast *extends_ast = decl->child[0];
  	zend_ast *implements_ast = decl->child[1];
  	zend_ast *stmt_ast = decl->child[2];
  	zend_string *name, *lcname;
  	zend_class_entry *ce = zend_arena_alloc(&CG(arena), sizeof(zend_class_entry));
  	zend_op *opline;
  
  	zend_class_entry *original_ce = CG(active_class_entry);
  
  	if (EXPECTED((decl->flags & ZEND_ACC_ANON_CLASS) == 0)) {
  		zend_string *unqualified_name = decl->name;
  
  		if (CG(active_class_entry)) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Class declarations may not be nested");
  		}
  
  		zend_assert_valid_class_name(unqualified_name);
  		name = zend_prefix_with_ns(unqualified_name);
  		name = zend_new_interned_string(name);
  		lcname = zend_string_tolower(name);
  
  		if (FC(imports)) {
  			zend_string *import_name = zend_hash_find_ptr_lc(
  				FC(imports), ZSTR_VAL(unqualified_name), ZSTR_LEN(unqualified_name));
  			if (import_name && !zend_string_equals_ci(lcname, import_name)) {
  				zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare class %s "
  						"because the name is already in use", ZSTR_VAL(name));
  			}
  		}
  
  		zend_register_seen_symbol(lcname, ZEND_SYMBOL_CLASS);
  	} else {
  		name = zend_generate_anon_class_name(decl->lex_pos);
  		lcname = zend_string_tolower(name);
  	}
  	lcname = zend_new_interned_string(lcname);
  
  	ce->type = ZEND_USER_CLASS;
  	ce->name = name;
  	zend_initialize_class_data(ce, 1);
  
  	ce->ce_flags |= decl->flags;
  	ce->info.user.filename = zend_get_compiled_filename();
  	ce->info.user.line_start = decl->start_lineno;
  	ce->info.user.line_end = decl->end_lineno;
  
  	if (decl->doc_comment) {
  		ce->info.user.doc_comment = zend_string_copy(decl->doc_comment);
  	}
  
  	if (UNEXPECTED((decl->flags & ZEND_ACC_ANON_CLASS))) {
  		/* Serialization is not supported for anonymous classes */
  		ce->serialize = zend_class_serialize_deny;
  		ce->unserialize = zend_class_unserialize_deny;
  	}
  
  	if (extends_ast) {
  		znode extends_node;
  		zend_string *extends_name;
  
  		if (!zend_is_const_default_class_ref(extends_ast)) {
  			extends_name = zend_ast_get_str(extends_ast);
  			zend_error_noreturn(E_COMPILE_ERROR,
  				"Cannot use '%s' as class name as it is reserved", ZSTR_VAL(extends_name));
  		}
  
  		zend_compile_expr(&extends_node, extends_ast);
  		if (extends_node.op_type != IS_CONST || Z_TYPE(extends_node.u.constant) != IS_STRING) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Illegal class name");
  		}
  		extends_name = Z_STR(extends_node.u.constant);
  		ce->parent_name = zend_resolve_class_name(extends_name,
  					extends_ast->kind == ZEND_AST_ZVAL ? extends_ast->attr : ZEND_NAME_FQ);
  		zend_string_release_ex(extends_name, 0);
  		ce->ce_flags |= ZEND_ACC_INHERITED;
  	}
  
  	CG(active_class_entry) = ce;
  
  	zend_compile_stmt(stmt_ast);
  
  	/* Reset lineno for final opcodes and errors */
  	CG(zend_lineno) = ast->lineno;
  
  	if (ce->constructor) {
  		ce->constructor->common.fn_flags |= ZEND_ACC_CTOR;
  		if (ce->constructor->common.fn_flags & ZEND_ACC_STATIC) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Constructor %s::%s() cannot be static",
  				ZSTR_VAL(ce->name), ZSTR_VAL(ce->constructor->common.function_name));
  		}
  		if (ce->constructor->common.fn_flags & ZEND_ACC_HAS_RETURN_TYPE) {
  			zend_error_noreturn(E_COMPILE_ERROR,
  				"Constructor %s::%s() cannot declare a return type",
  				ZSTR_VAL(ce->name), ZSTR_VAL(ce->constructor->common.function_name));
  		}
  	}
  	if (ce->destructor) {
  		ce->destructor->common.fn_flags |= ZEND_ACC_DTOR;
  		if (ce->destructor->common.fn_flags & ZEND_ACC_STATIC) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Destructor %s::%s() cannot be static",
  				ZSTR_VAL(ce->name), ZSTR_VAL(ce->destructor->common.function_name));
  		} else if (ce->destructor->common.fn_flags & ZEND_ACC_HAS_RETURN_TYPE) {
  			zend_error_noreturn(E_COMPILE_ERROR,
  				"Destructor %s::%s() cannot declare a return type",
  				ZSTR_VAL(ce->name), ZSTR_VAL(ce->destructor->common.function_name));
  		}
  	}
  	if (ce->clone) {
  		if (ce->clone->common.fn_flags & ZEND_ACC_STATIC) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Clone method %s::%s() cannot be static",
  				ZSTR_VAL(ce->name), ZSTR_VAL(ce->clone->common.function_name));
  		} else if (ce->clone->common.fn_flags & ZEND_ACC_HAS_RETURN_TYPE) {
  			zend_error_noreturn(E_COMPILE_ERROR,
  				"Clone method %s::%s() cannot declare a return type",
  				ZSTR_VAL(ce->name), ZSTR_VAL(ce->clone->common.function_name));
  		}
  	}
  
  	if (implements_ast) {
  		zend_compile_implements(implements_ast);
  	}
  
  	if ((ce->ce_flags & (ZEND_ACC_IMPLICIT_ABSTRACT_CLASS|ZEND_ACC_INTERFACE|ZEND_ACC_TRAIT|ZEND_ACC_EXPLICIT_ABSTRACT_CLASS)) == ZEND_ACC_IMPLICIT_ABSTRACT_CLASS) {
  		zend_verify_abstract_class(ce);
  	}
  
  	CG(active_class_entry) = original_ce;
  
  	if (toplevel) {
  		ce->ce_flags |= ZEND_ACC_TOP_LEVEL;
  	}
  
  	if (toplevel
  		/* We currently don't early-bind classes that implement interfaces or use traits */
  	 && !(ce->ce_flags & (ZEND_ACC_IMPLEMENT_INTERFACES|ZEND_ACC_IMPLEMENT_TRAITS))) {
  		if (extends_ast) {
  			zend_class_entry *parent_ce = zend_lookup_class_ex(ce->parent_name, NULL, 0);
  
  			if (parent_ce
  			 && ((parent_ce->type != ZEND_INTERNAL_CLASS) || !(CG(compiler_options) & ZEND_COMPILE_IGNORE_INTERNAL_CLASSES))
  			 && ((parent_ce->type != ZEND_USER_CLASS) || !(CG(compiler_options) & ZEND_COMPILE_IGNORE_OTHER_FILES) || (parent_ce->info.user.filename == ce->info.user.filename))
  				) {
  				if (EXPECTED(zend_hash_add_ptr(CG(class_table), lcname, ce) != NULL)) {
  					CG(zend_lineno) = decl->end_lineno;
  					ce->ce_flags |= ZEND_ACC_LINKED;
  					zend_do_inheritance(ce, parent_ce);
  					zend_build_properties_info_table(ce);
  					if ((ce->ce_flags & (ZEND_ACC_IMPLICIT_ABSTRACT_CLASS|ZEND_ACC_INTERFACE|ZEND_ACC_TRAIT|ZEND_ACC_EXPLICIT_ABSTRACT_CLASS)) == ZEND_ACC_IMPLICIT_ABSTRACT_CLASS) {
  						zend_verify_abstract_class(ce);
  					}
  					CG(zend_lineno) = ast->lineno;
  					zend_string_release(lcname);
  					return NULL;
  				}
  			}
  		} else {
  			if (EXPECTED(zend_hash_add_ptr(CG(class_table), lcname, ce) != NULL)) {
  				zend_string_release(lcname);
  				zend_build_properties_info_table(ce);
  				ce->ce_flags |= ZEND_ACC_LINKED;
  				return NULL;
  			}
  		}
  	}
  
  	opline = get_next_op();
  
  	opline->op1_type = IS_CONST;
  	LITERAL_STR(opline->op1, lcname);
  
  	if (decl->flags & ZEND_ACC_ANON_CLASS) {
  		opline->result_type = IS_VAR;
  		opline->result.var = get_temporary_variable();
  		if (extends_ast) {
  			opline->opcode = ZEND_DECLARE_ANON_INHERITED_CLASS;
  			opline->op2_type = IS_CONST;
  			opline->op2.constant = zend_add_class_name_literal(zend_string_copy(ce->parent_name));
  		} else {
  			opline->opcode = ZEND_DECLARE_ANON_CLASS;
  		}
  
  		if (!zend_hash_add_ptr(CG(class_table), lcname, ce)) {
  			/* this anonymous class has been included */
  			zval zv;
  			ZVAL_PTR(&zv, ce);
  			destroy_zend_class(&zv);
  			return opline;
  		}
  	} else {
  		zend_string *key = zend_build_runtime_definition_key(lcname, decl->lex_pos);
  
  		/* RTD key is placed after lcname literal in op1 */
  		zend_add_literal_string(&key);
  		zend_hash_update_ptr(CG(class_table), key, ce);
  
  		if (extends_ast) {
  			if (toplevel
  			 && (CG(compiler_options) & ZEND_COMPILE_DELAYED_BINDING)
  				/* We currently don't early-bind classes that implement interfaces or use traits */
  			 && !(ce->ce_flags & (ZEND_ACC_IMPLEMENT_INTERFACES|ZEND_ACC_IMPLEMENT_TRAITS))) {
  				CG(active_op_array)->fn_flags |= ZEND_ACC_EARLY_BINDING;
  				opline->opcode = ZEND_DECLARE_INHERITED_CLASS_DELAYED;
  				opline->result_type = IS_UNUSED;
  				opline->result.opline_num = -1;
  			} else {
  				opline->opcode = ZEND_DECLARE_INHERITED_CLASS;
  			}
  			opline->op2_type = IS_CONST;
  			opline->op2.constant = zend_add_class_name_literal(zend_string_copy(ce->parent_name));
  		} else {
  			opline->opcode = ZEND_DECLARE_CLASS;
  		}
  	}
  	return opline;
  }
  /* }}} */
  
  static HashTable *zend_get_import_ht(uint32_t type) /* {{{ */
  {
  	switch (type) {
  		case ZEND_SYMBOL_CLASS:
  			if (!FC(imports)) {
  				FC(imports) = emalloc(sizeof(HashTable));
  				zend_hash_init(FC(imports), 8, NULL, str_dtor, 0);
  			}
  			return FC(imports);
  		case ZEND_SYMBOL_FUNCTION:
  			if (!FC(imports_function)) {
  				FC(imports_function) = emalloc(sizeof(HashTable));
  				zend_hash_init(FC(imports_function), 8, NULL, str_dtor, 0);
  			}
  			return FC(imports_function);
  		case ZEND_SYMBOL_CONST:
  			if (!FC(imports_const)) {
  				FC(imports_const) = emalloc(sizeof(HashTable));
  				zend_hash_init(FC(imports_const), 8, NULL, str_dtor, 0);
  			}
  			return FC(imports_const);
  		EMPTY_SWITCH_DEFAULT_CASE()
  	}
  
  	return NULL;
  }
  /* }}} */
  
  static char *zend_get_use_type_str(uint32_t type) /* {{{ */
  {
  	switch (type) {
  		case ZEND_SYMBOL_CLASS:
  			return "";
  		case ZEND_SYMBOL_FUNCTION:
  			return " function";
  		case ZEND_SYMBOL_CONST:
  			return " const";
  		EMPTY_SWITCH_DEFAULT_CASE()
  	}
  
  	return " unknown";
  }
  /* }}} */
  
  static void zend_check_already_in_use(uint32_t type, zend_string *old_name, zend_string *new_name, zend_string *check_name) /* {{{ */
  {
  	if (zend_string_equals_ci(old_name, check_name)) {
  		return;
  	}
  
  	zend_error_noreturn(E_COMPILE_ERROR, "Cannot use%s %s as %s because the name "
  		"is already in use", zend_get_use_type_str(type), ZSTR_VAL(old_name), ZSTR_VAL(new_name));
  }
  /* }}} */
  
  void zend_compile_use(zend_ast *ast) /* {{{ */
  {
  	zend_ast_list *list = zend_ast_get_list(ast);
  	uint32_t i;
  	zend_string *current_ns = FC(current_namespace);
  	uint32_t type = ast->attr;
  	HashTable *current_import = zend_get_import_ht(type);
  	zend_bool case_sensitive = type == ZEND_SYMBOL_CONST;
  
  	for (i = 0; i < list->children; ++i) {
  		zend_ast *use_ast = list->child[i];
  		zend_ast *old_name_ast = use_ast->child[0];
  		zend_ast *new_name_ast = use_ast->child[1];
  		zend_string *old_name = zend_ast_get_str(old_name_ast);
  		zend_string *new_name, *lookup_name;
  
  		if (new_name_ast) {
  			new_name = zend_string_copy(zend_ast_get_str(new_name_ast));
  		} else {
  			const char *unqualified_name;
  			size_t unqualified_name_len;
  			if (zend_get_unqualified_name(old_name, &unqualified_name, &unqualified_name_len)) {
  				/* The form "use A\B" is equivalent to "use A\B as B" */
  				new_name = zend_string_init(unqualified_name, unqualified_name_len, 0);
  			} else {
  				new_name = zend_string_copy(old_name);
  
  				if (!current_ns) {
  					if (type == T_CLASS && zend_string_equals_literal(new_name, "strict")) {
  						zend_error_noreturn(E_COMPILE_ERROR,
  							"You seem to be trying to use a different language...");
  					}
  
  					zend_error(E_WARNING, "The use statement with non-compound name '%s' "
  						"has no effect", ZSTR_VAL(new_name));
  				}
  			}
  		}
  
  		if (case_sensitive) {
  			lookup_name = zend_string_copy(new_name);
  		} else {
  			lookup_name = zend_string_tolower(new_name);
  		}
  
  		if (type == ZEND_SYMBOL_CLASS && zend_is_reserved_class_name(new_name)) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use %s as %s because '%s' "
  				"is a special class name", ZSTR_VAL(old_name), ZSTR_VAL(new_name), ZSTR_VAL(new_name));
  		}
  
  		if (current_ns) {
  			zend_string *ns_name = zend_string_alloc(ZSTR_LEN(current_ns) + 1 + ZSTR_LEN(new_name), 0);
  			zend_str_tolower_copy(ZSTR_VAL(ns_name), ZSTR_VAL(current_ns), ZSTR_LEN(current_ns));
  			ZSTR_VAL(ns_name)[ZSTR_LEN(current_ns)] = '\\';
  			memcpy(ZSTR_VAL(ns_name) + ZSTR_LEN(current_ns) + 1, ZSTR_VAL(lookup_name), ZSTR_LEN(lookup_name) + 1);
  
  			if (zend_have_seen_symbol(ns_name, type)) {
  				zend_check_already_in_use(type, old_name, new_name, ns_name);
  			}
  
  			zend_string_efree(ns_name);
  		} else {
  			if (zend_have_seen_symbol(lookup_name, type)) {
  				zend_check_already_in_use(type, old_name, new_name, lookup_name);
  			}
  		}
  
  		zend_string_addref(old_name);
  		if (!zend_hash_add_ptr(current_import, lookup_name, old_name)) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use%s %s as %s because the name "
  				"is already in use", zend_get_use_type_str(type), ZSTR_VAL(old_name), ZSTR_VAL(new_name));
  		}
  
  		zend_string_release_ex(lookup_name, 0);
  		zend_string_release_ex(new_name, 0);
  	}
  }
  /* }}} */
  
  void zend_compile_group_use(zend_ast *ast) /* {{{ */
  {
  	uint32_t i;
  	zend_string *ns = zend_ast_get_str(ast->child[0]);
  	zend_ast_list *list = zend_ast_get_list(ast->child[1]);
  
  	for (i = 0; i < list->children; i++) {
  		zend_ast *inline_use, *use = list->child[i];
  		zval *name_zval = zend_ast_get_zval(use->child[0]);
  		zend_string *name = Z_STR_P(name_zval);
  		zend_string *compound_ns = zend_concat_names(ZSTR_VAL(ns), ZSTR_LEN(ns), ZSTR_VAL(name), ZSTR_LEN(name));
  		zend_string_release_ex(name, 0);
  		ZVAL_STR(name_zval, compound_ns);
  		inline_use = zend_ast_create_list(1, ZEND_AST_USE, use);
  		inline_use->attr = ast->attr ? ast->attr : use->attr;
  		zend_compile_use(inline_use);
  	}
  }
  /* }}} */
  
  void zend_compile_const_decl(zend_ast *ast) /* {{{ */
  {
  	zend_ast_list *list = zend_ast_get_list(ast);
  	uint32_t i;
  	for (i = 0; i < list->children; ++i) {
  		zend_ast *const_ast = list->child[i];
  		zend_ast *name_ast = const_ast->child[0];
  		zend_ast *value_ast = const_ast->child[1];
  		zend_string *unqualified_name = zend_ast_get_str(name_ast);
  
  		zend_string *name;
  		znode name_node, value_node;
  		zval *value_zv = &value_node.u.constant;
  
  		value_node.op_type = IS_CONST;
  		zend_const_expr_to_zval(value_zv, value_ast);
  
  		if (zend_get_special_const(ZSTR_VAL(unqualified_name), ZSTR_LEN(unqualified_name))) {
  			zend_error_noreturn(E_COMPILE_ERROR,
  				"Cannot redeclare constant '%s'", ZSTR_VAL(unqualified_name));
  		}
  
  		name = zend_prefix_with_ns(unqualified_name);
  		name = zend_new_interned_string(name);
  
  		if (FC(imports_const)) {
  			zend_string *import_name = zend_hash_find_ptr(FC(imports_const), unqualified_name);
  			if (import_name && !zend_string_equals(import_name, name)) {
  				zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare const %s because "
  					"the name is already in use", ZSTR_VAL(name));
  			}
  		}
  
  		name_node.op_type = IS_CONST;
  		ZVAL_STR(&name_node.u.constant, name);
  
  		zend_emit_op(NULL, ZEND_DECLARE_CONST, &name_node, &value_node);
  
  		zend_register_seen_symbol(name, ZEND_SYMBOL_CONST);
  	}
  }
  /* }}}*/
  
  void zend_compile_namespace(zend_ast *ast) /* {{{ */
  {
  	zend_ast *name_ast = ast->child[0];
  	zend_ast *stmt_ast = ast->child[1];
  	zend_string *name;
  	zend_bool with_bracket = stmt_ast != NULL;
  
  	/* handle mixed syntax declaration or nested namespaces */
  	if (!FC(has_bracketed_namespaces)) {
  		if (FC(current_namespace)) {
  			/* previous namespace declarations were unbracketed */
  			if (with_bracket) {
  				zend_error_noreturn(E_COMPILE_ERROR, "Cannot mix bracketed namespace declarations "
  					"with unbracketed namespace declarations");
  			}
  		}
  	} else {
  		/* previous namespace declarations were bracketed */
  		if (!with_bracket) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot mix bracketed namespace declarations "
  				"with unbracketed namespace declarations");
  		} else if (FC(current_namespace) || FC(in_namespace)) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Namespace declarations cannot be nested");
  		}
  	}
  
  	if (((!with_bracket && !FC(current_namespace))
  		 || (with_bracket && !FC(has_bracketed_namespaces))) && CG(active_op_array)->last > 0
  	) {
  		/* ignore ZEND_EXT_STMT and ZEND_TICKS */
  		uint32_t num = CG(active_op_array)->last;
  		while (num > 0 &&
  		       (CG(active_op_array)->opcodes[num-1].opcode == ZEND_EXT_STMT ||
  		        CG(active_op_array)->opcodes[num-1].opcode == ZEND_TICKS)) {
  			--num;
  		}
  		if (num > 0) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Namespace declaration statement has to be "
  				"the very first statement or after any declare call in the script");
  		}
  	}
  
  	if (FC(current_namespace)) {
  		zend_string_release_ex(FC(current_namespace), 0);
  	}
  
  	if (name_ast) {
  		name = zend_ast_get_str(name_ast);
  
  		if (ZEND_FETCH_CLASS_DEFAULT != zend_get_class_fetch_type(name)) {
  			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use '%s' as namespace name", ZSTR_VAL(name));
  		}
  
  		FC(current_namespace) = zend_string_copy(name);
  	} else {
  		FC(current_namespace) = NULL;
  	}
  
  	zend_reset_import_tables();
  
  	FC(in_namespace) = 1;
  	if (with_bracket) {
  		FC(has_bracketed_namespaces) = 1;
  	}
  
  	if (stmt_ast) {
  		zend_compile_top_stmt(stmt_ast);
  		zend_end_namespace();
  	}
  }
  /* }}} */
  
  void zend_compile_halt_compiler(zend_ast *ast) /* {{{ */
  {
  	zend_ast *offset_ast = ast->child[0];
  	zend_long offset = Z_LVAL_P(zend_ast_get_zval(offset_ast));
  
  	zend_string *filename, *name;
  	const char const_name[] = "__COMPILER_HALT_OFFSET__";
  
  	if (FC(has_bracketed_namespaces) && FC(in_namespace)) {
  		zend_error_noreturn(E_COMPILE_ERROR,
  			"__HALT_COMPILER() can only be used from the outermost scope");
  	}
  
  	filename = zend_get_compiled_filename();
  	name = zend_mangle_property_name(const_name, sizeof(const_name) - 1,
  		ZSTR_VAL(filename), ZSTR_LEN(filename), 0);
  
  	zend_register_long_constant(ZSTR_VAL(name), ZSTR_LEN(name), offset, CONST_CS, 0);
  	zend_string_release_ex(name, 0);
  }
  /* }}} */
  
  static zend_bool zend_try_ct_eval_magic_const(zval *zv, zend_ast *ast) /* {{{ */
  {
  	zend_op_array *op_array = CG(active_op_array);
  	zend_class_entry *ce = CG(active_class_entry);
  
  	switch (ast->attr) {
  		case T_LINE:
  			ZVAL_LONG(zv, ast->lineno);
  			break;
  		case T_FILE:
  			ZVAL_STR_COPY(zv, CG(compiled_filename));
  			break;
  		case T_DIR:
  		{
  			zend_string *filename = CG(compiled_filename);
  			zend_string *dirname = zend_string_init(ZSTR_VAL(filename), ZSTR_LEN(filename), 0);
  #ifdef ZEND_WIN32
  			ZSTR_LEN(dirname) = php_win32_ioutil_dirname(ZSTR_VAL(dirname), ZSTR_LEN(dirname));
  #else
  			ZSTR_LEN(dirname) = zend_dirname(ZSTR_VAL(dirname), ZSTR_LEN(dirname));
  #endif
  
  			if (strcmp(ZSTR_VAL(dirname), ".") == 0) {
  				dirname = zend_string_extend(dirname, MAXPATHLEN, 0);
  #if HAVE_GETCWD
  				ZEND_IGNORE_VALUE(VCWD_GETCWD(ZSTR_VAL(dirname), MAXPATHLEN));
  #elif HAVE_GETWD
  				ZEND_IGNORE_VALUE(VCWD_GETWD(ZSTR_VAL(dirname)));
  #endif
  				ZSTR_LEN(dirname) = strlen(ZSTR_VAL(dirname));
  			}
  
  			ZVAL_STR(zv, dirname);
  			break;
  		}
  		case T_FUNC_C:
  			if (op_array && op_array->function_name) {
  				ZVAL_STR_COPY(zv, op_array->function_name);
  			} else {
  				ZVAL_EMPTY_STRING(zv);
  			}
  			break;
  		case T_METHOD_C:
  			/* Detect whether we are directly inside a class (e.g. a class constant) and treat
  			 * this as not being inside a function. */
  			if (op_array && ce && !op_array->scope && !(op_array->fn_flags & ZEND_ACC_CLOSURE)) {
  				op_array = NULL;
  			}
  			if (op_array && op_array->function_name) {
  				if (op_array->scope) {
  					ZVAL_NEW_STR(zv, zend_concat3(
  						ZSTR_VAL(op_array->scope->name), ZSTR_LEN(op_array->scope->name),
  						"::", 2,
  						ZSTR_VAL(op_array->function_name), ZSTR_LEN(op_array->function_name)));
  				} else {
  					ZVAL_STR_COPY(zv, op_array->function_name);
  				}
  			} else {
  				ZVAL_EMPTY_STRING(zv);
  			}
  			break;
  		case T_CLASS_C:
  			if (ce) {
  				if ((ce->ce_flags & ZEND_ACC_TRAIT) != 0) {
  					return 0;
  				} else {
  					ZVAL_STR_COPY(zv, ce->name);
  				}
  			} else {
  				ZVAL_EMPTY_STRING(zv);
  			}
  			break;
  		case T_TRAIT_C:
  			if (ce && (ce->ce_flags & ZEND_ACC_TRAIT) != 0) {
  				ZVAL_STR_COPY(zv, ce->name);
  			} else {
  				ZVAL_EMPTY_STRING(zv);
  			}
  			break;
  		case T_NS_C:
  			if (FC(current_namespace)) {
  				ZVAL_STR_COPY(zv, FC(current_namespace));
  			} else {
  				ZVAL_EMPTY_STRING(zv);
  			}
  			break;
  		EMPTY_SWITCH_DEFAULT_CASE()
  	}
  
  	return 1;
  }
  /* }}} */
  
  ZEND_API zend_bool zend_binary_op_produces_numeric_string_error(uint32_t opcode, zval *op1, zval *op2) /* {{{ */
  {
  	if (!(opcode == ZEND_ADD || opcode == ZEND_SUB || opcode == ZEND_MUL || opcode == ZEND_DIV
  		|| opcode == ZEND_POW || opcode == ZEND_MOD || opcode == ZEND_SL || opcode == ZEND_SR
  		|| opcode == ZEND_BW_OR || opcode == ZEND_BW_AND || opcode == ZEND_BW_XOR)) {
  		return 0;
  	}
  
  	/* While basic arithmetic operators always produce numeric string errors,
  	 * bitwise operators don't produce errors if both operands are strings */
  	if ((opcode == ZEND_BW_OR || opcode == ZEND_BW_AND || opcode == ZEND_BW_XOR)
  		&& Z_TYPE_P(op1) == IS_STRING && Z_TYPE_P(op2) == IS_STRING) {
  		return 0;
  	}
  
  	if (Z_TYPE_P(op1) == IS_STRING
  		&& !is_numeric_string(Z_STRVAL_P(op1), Z_STRLEN_P(op1), NULL, NULL, 0)) {
  		return 1;
  	}
  
  	if (Z_TYPE_P(op2) == IS_STRING
  		&& !is_numeric_string(Z_STRVAL_P(op2), Z_STRLEN_P(op2), NULL, NULL, 0)) {
  		return 1;
  	}
  
  	return 0;
  }
  /* }}} */
  
  ZEND_API zend_bool zend_binary_op_produces_array_conversion_error(uint32_t opcode, zval *op1, zval *op2) /* {{{ */
  {
  	if (opcode == ZEND_CONCAT && (Z_TYPE_P(op1) == IS_ARRAY || Z_TYPE_P(op2) == IS_ARRAY)) {
  		return 1;
  	}
  
  	return 0;
  }
  /* }}} */
  
  static inline zend_bool zend_try_ct_eval_binary_op(zval *result, uint32_t opcode, zval *op1, zval *op2) /* {{{ */
  {
  	binary_op_type fn = get_binary_op(opcode);
  
  	/* don't evaluate division by zero at compile-time */
  	if ((opcode == ZEND_DIV || opcode == ZEND_MOD) &&
  	    zval_get_long(op2) == 0) {
  		return 0;
  	} else if ((opcode == ZEND_SL || opcode == ZEND_SR) &&
  	    zval_get_long(op2) < 0) {
  		return 0;
  	}
  
  	/* don't evaluate numeric string error-producing operations at compile-time */
  	if (zend_binary_op_produces_numeric_string_error(opcode, op1, op2)) {
  		return 0;
  	}
  	/* don't evaluate array to string conversions at compile-time */
  	if (zend_binary_op_produces_array_conversion_error(opcode, op1, op2)) {
  		return 0;
  	}
  
  	fn(result, op1, op2);
  	return 1;
  }
  /* }}} */
  
  static inline void zend_ct_eval_unary_op(zval *result, uint32_t opcode, zval *op) /* {{{ */
  {
  	unary_op_type fn = get_unary_op(opcode);
  	fn(result, op);
  }
  /* }}} */
  
  static inline zend_bool zend_try_ct_eval_unary_pm(zval *result, zend_ast_kind kind, zval *op) /* {{{ */
  {
  	zval left;
  	ZVAL_LONG(&left, (kind == ZEND_AST_UNARY_PLUS) ? 1 : -1);
  	return zend_try_ct_eval_binary_op(result, ZEND_MUL, &left, op);
  }
  /* }}} */
  
  static inline void zend_ct_eval_greater(zval *result, zend_ast_kind kind, zval *op1, zval *op2) /* {{{ */
  {
  	binary_op_type fn = kind == ZEND_AST_GREATER
  		? is_smaller_function : is_smaller_or_equal_function;
  	fn(result, op2, op1);
  }
  /* }}} */
  
  static zend_bool zend_try_ct_eval_array(zval *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast_list *list = zend_ast_get_list(ast);
  	zend_ast *last_elem_ast = NULL;
  	uint32_t i;
  	zend_bool is_constant = 1;
  
  	if (ast->attr == ZEND_ARRAY_SYNTAX_LIST) {
  		zend_error(E_COMPILE_ERROR, "Cannot use list() as standalone expression");
  	}
  
  	/* First ensure that *all* child nodes are constant and by-val */
  	for (i = 0; i < list->children; ++i) {
  		zend_ast *elem_ast = list->child[i];
  
  		if (elem_ast == NULL) {
  			/* Report error at line of last non-empty element */
  			if (last_elem_ast) {
  				CG(zend_lineno) = zend_ast_get_lineno(last_elem_ast);
  			}
  			zend_error(E_COMPILE_ERROR, "Cannot use empty array elements in arrays");
  		}
  
  		zend_eval_const_expr(&elem_ast->child[0]);
  		zend_eval_const_expr(&elem_ast->child[1]);
  
  		if (elem_ast->attr /* by_ref */ || elem_ast->child[0]->kind != ZEND_AST_ZVAL
  			|| (elem_ast->child[1] && elem_ast->child[1]->kind != ZEND_AST_ZVAL)
  		) {
  			is_constant = 0;
  		}
  
  		last_elem_ast = elem_ast;
  	}
  
  	if (!is_constant) {
  		return 0;
  	}
  
  	if (!list->children) {
  		ZVAL_EMPTY_ARRAY(result);
  		return 1;
  	}
  
  	array_init_size(result, list->children);
  	for (i = 0; i < list->children; ++i) {
  		zend_ast *elem_ast = list->child[i];
  		zend_ast *value_ast = elem_ast->child[0];
  		zend_ast *key_ast = elem_ast->child[1];
  
  		zval *value = zend_ast_get_zval(value_ast);
  		Z_TRY_ADDREF_P(value);
  
  		if (key_ast) {
  			zval *key = zend_ast_get_zval(key_ast);
  			switch (Z_TYPE_P(key)) {
  				case IS_LONG:
  					zend_hash_index_update(Z_ARRVAL_P(result), Z_LVAL_P(key), value);
  					break;
  				case IS_STRING:
  					zend_symtable_update(Z_ARRVAL_P(result), Z_STR_P(key), value);
  					break;
  				case IS_DOUBLE:
  					zend_hash_index_update(Z_ARRVAL_P(result),
  						zend_dval_to_lval(Z_DVAL_P(key)), value);
  					break;
  				case IS_FALSE:
  					zend_hash_index_update(Z_ARRVAL_P(result), 0, value);
  					break;
  				case IS_TRUE:
  					zend_hash_index_update(Z_ARRVAL_P(result), 1, value);
  					break;
  				case IS_NULL:
  					zend_hash_update(Z_ARRVAL_P(result), ZSTR_EMPTY_ALLOC(), value);
  					break;
  				default:
  					zend_error_noreturn(E_COMPILE_ERROR, "Illegal offset type");
  					break;
  			}
  		} else {
  			if (!zend_hash_next_index_insert(Z_ARRVAL_P(result), value)) {
  				zval_ptr_dtor_nogc(value);
  				zval_ptr_dtor(result);
  				return 0;
  			}
  		}
  	}
  
  	return 1;
  }
  /* }}} */
  
  void zend_compile_binary_op(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *left_ast = ast->child[0];
  	zend_ast *right_ast = ast->child[1];
  	uint32_t opcode = ast->attr;
  
  	znode left_node, right_node;
  	zend_compile_expr(&left_node, left_ast);
  	zend_compile_expr(&right_node, right_ast);
  
  	if (left_node.op_type == IS_CONST && right_node.op_type == IS_CONST) {
  		if (zend_try_ct_eval_binary_op(&result->u.constant, opcode,
  				&left_node.u.constant, &right_node.u.constant)
  		) {
  			result->op_type = IS_CONST;
  			zval_ptr_dtor(&left_node.u.constant);
  			zval_ptr_dtor(&right_node.u.constant);
  			return;
  		}
  	}
  
  	do {
  		if (opcode == ZEND_IS_EQUAL || opcode == ZEND_IS_NOT_EQUAL) {
  			if (left_node.op_type == IS_CONST) {
  				if (Z_TYPE(left_node.u.constant) == IS_FALSE) {
  					opcode = (opcode == ZEND_IS_NOT_EQUAL) ? ZEND_BOOL : ZEND_BOOL_NOT;
  					zend_emit_op_tmp(result, opcode, &right_node, NULL);
  					break;
  				} else if (Z_TYPE(left_node.u.constant) == IS_TRUE) {
  					opcode = (opcode == ZEND_IS_EQUAL) ? ZEND_BOOL : ZEND_BOOL_NOT;
  					zend_emit_op_tmp(result, opcode, &right_node, NULL);
  					break;
  				}
  			} else if (right_node.op_type == IS_CONST) {
  				if (Z_TYPE(right_node.u.constant) == IS_FALSE) {
  					opcode = (opcode == ZEND_IS_NOT_EQUAL) ? ZEND_BOOL : ZEND_BOOL_NOT;
  					zend_emit_op_tmp(result, opcode, &left_node, NULL);
  					break;
  				} else if (Z_TYPE(right_node.u.constant) == IS_TRUE) {
  					opcode = (opcode == ZEND_IS_EQUAL) ? ZEND_BOOL : ZEND_BOOL_NOT;
  					zend_emit_op_tmp(result, opcode, &left_node, NULL);
  					break;
  				}
  			}
  		}
  		if (opcode == ZEND_CONCAT) {
  			/* convert constant operands to strings at compile-time */
  			if (left_node.op_type == IS_CONST) {
  				if (Z_TYPE(left_node.u.constant) == IS_ARRAY) {
  					zend_emit_op_tmp(&left_node, ZEND_CAST, &left_node, NULL)->extended_value = IS_STRING;
  				} else {
  					convert_to_string(&left_node.u.constant);
  				}
  			}
  			if (right_node.op_type == IS_CONST) {
  				if (Z_TYPE(right_node.u.constant) == IS_ARRAY) {
  					zend_emit_op_tmp(&right_node, ZEND_CAST, &right_node, NULL)->extended_value = IS_STRING;
  				} else {
  					convert_to_string(&right_node.u.constant);
  				}
  			}
  			if (left_node.op_type == IS_CONST && right_node.op_type == IS_CONST) {
  				opcode = ZEND_FAST_CONCAT;
  			}
  		}
  		zend_emit_op_tmp(result, opcode, &left_node, &right_node);
  	} while (0);
  }
  /* }}} */
  
  /* We do not use zend_compile_binary_op for this because we want to retain the left-to-right
   * evaluation order. */
  void zend_compile_greater(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *left_ast = ast->child[0];
  	zend_ast *right_ast = ast->child[1];
  	znode left_node, right_node;
  
  	ZEND_ASSERT(ast->kind == ZEND_AST_GREATER || ast->kind == ZEND_AST_GREATER_EQUAL);
  
  	zend_compile_expr(&left_node, left_ast);
  	zend_compile_expr(&right_node, right_ast);
  
  	if (left_node.op_type == IS_CONST && right_node.op_type == IS_CONST) {
  		result->op_type = IS_CONST;
  		zend_ct_eval_greater(&result->u.constant, ast->kind,
  			&left_node.u.constant, &right_node.u.constant);
  		zval_ptr_dtor(&left_node.u.constant);
  		zval_ptr_dtor(&right_node.u.constant);
  		return;
  	}
  
  	zend_emit_op_tmp(result,
  		ast->kind == ZEND_AST_GREATER ? ZEND_IS_SMALLER : ZEND_IS_SMALLER_OR_EQUAL,
  		&right_node, &left_node);
  }
  /* }}} */
  
  void zend_compile_unary_op(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *expr_ast = ast->child[0];
  	uint32_t opcode = ast->attr;
  
  	znode expr_node;
  	zend_compile_expr(&expr_node, expr_ast);
  
  	if (expr_node.op_type == IS_CONST) {
  		result->op_type = IS_CONST;
  		zend_ct_eval_unary_op(&result->u.constant, opcode,
  			&expr_node.u.constant);
  		zval_ptr_dtor(&expr_node.u.constant);
  		return;
  	}
  
  	zend_emit_op_tmp(result, opcode, &expr_node, NULL);
  }
  /* }}} */
  
  void zend_compile_unary_pm(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *expr_ast = ast->child[0];
  	znode expr_node;
  	znode lefthand_node;
  
  	ZEND_ASSERT(ast->kind == ZEND_AST_UNARY_PLUS || ast->kind == ZEND_AST_UNARY_MINUS);
  
  	zend_compile_expr(&expr_node, expr_ast);
  
  	if (expr_node.op_type == IS_CONST) {
  		if (zend_try_ct_eval_unary_pm(&result->u.constant, ast->kind, &expr_node.u.constant)) {
  			result->op_type = IS_CONST;
  			zval_ptr_dtor(&expr_node.u.constant);
  			return;
  		}
  	}
  
  	lefthand_node.op_type = IS_CONST;
  	ZVAL_LONG(&lefthand_node.u.constant, (ast->kind == ZEND_AST_UNARY_PLUS) ? 1 : -1);
  	zend_emit_op_tmp(result, ZEND_MUL, &lefthand_node, &expr_node);
  }
  /* }}} */
  
  void zend_compile_short_circuiting(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *left_ast = ast->child[0];
  	zend_ast *right_ast = ast->child[1];
  
  	znode left_node, right_node;
  	zend_op *opline_jmpz, *opline_bool;
  	uint32_t opnum_jmpz;
  
  	ZEND_ASSERT(ast->kind == ZEND_AST_AND || ast->kind == ZEND_AST_OR);
  
  	zend_compile_expr(&left_node, left_ast);
  
  	if (left_node.op_type == IS_CONST) {
  		if ((ast->kind == ZEND_AST_AND && !zend_is_true(&left_node.u.constant))
  		 || (ast->kind == ZEND_AST_OR && zend_is_true(&left_node.u.constant))) {
  			result->op_type = IS_CONST;
  			ZVAL_BOOL(&result->u.constant, zend_is_true(&left_node.u.constant));
  		} else {
  			zend_compile_expr(&right_node, right_ast);
  
  			if (right_node.op_type == IS_CONST) {
  				result->op_type = IS_CONST;
  				ZVAL_BOOL(&result->u.constant, zend_is_true(&right_node.u.constant));
  
  				zval_ptr_dtor(&right_node.u.constant);
  			} else {
  				zend_emit_op_tmp(result, ZEND_BOOL, &right_node, NULL);
  			}
  		}
  
  		zval_ptr_dtor(&left_node.u.constant);
  		return;
  	}
  
  	opnum_jmpz = get_next_op_number();
  	opline_jmpz = zend_emit_op(NULL, ast->kind == ZEND_AST_AND ? ZEND_JMPZ_EX : ZEND_JMPNZ_EX,
  		&left_node, NULL);
  
  	if (left_node.op_type == IS_TMP_VAR) {
  		SET_NODE(opline_jmpz->result, &left_node);
  	} else {
  		opline_jmpz->result.var = get_temporary_variable();
  		opline_jmpz->result_type = IS_TMP_VAR;
  	}
  
  	GET_NODE(result, opline_jmpz->result);
  	zend_compile_expr(&right_node, right_ast);
  
  	opline_bool = zend_emit_op(NULL, ZEND_BOOL, &right_node, NULL);
  	SET_NODE(opline_bool->result, result);
  
  	zend_update_jump_target_to_next(opnum_jmpz);
  }
  /* }}} */
  
  void zend_compile_post_incdec(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *var_ast = ast->child[0];
  	ZEND_ASSERT(ast->kind == ZEND_AST_POST_INC || ast->kind == ZEND_AST_POST_DEC);
  
  	zend_ensure_writable_variable(var_ast);
  
  	if (var_ast->kind == ZEND_AST_PROP) {
  		zend_op *opline = zend_compile_prop(NULL, var_ast, BP_VAR_RW, 0);
  		opline->opcode = ast->kind == ZEND_AST_POST_INC ? ZEND_POST_INC_OBJ : ZEND_POST_DEC_OBJ;
  		zend_make_tmp_result(result, opline);
  	} else if (var_ast->kind == ZEND_AST_STATIC_PROP) {
  		zend_op *opline = zend_compile_static_prop(NULL, var_ast, BP_VAR_RW, 0, 0);
  		opline->opcode = ast->kind == ZEND_AST_POST_INC ? ZEND_POST_INC_STATIC_PROP : ZEND_POST_DEC_STATIC_PROP;
  		zend_make_tmp_result(result, opline);
  	} else {
  		znode var_node;
  		zend_compile_var(&var_node, var_ast, BP_VAR_RW, 0);
  		zend_emit_op_tmp(result, ast->kind == ZEND_AST_POST_INC ? ZEND_POST_INC : ZEND_POST_DEC,
  			&var_node, NULL);
  	}
  }
  /* }}} */
  
  void zend_compile_pre_incdec(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *var_ast = ast->child[0];
  	ZEND_ASSERT(ast->kind == ZEND_AST_PRE_INC || ast->kind == ZEND_AST_PRE_DEC);
  
  	zend_ensure_writable_variable(var_ast);
  
  	if (var_ast->kind == ZEND_AST_PROP) {
  		zend_op *opline = zend_compile_prop(result, var_ast, BP_VAR_RW, 0);
  		opline->opcode = ast->kind == ZEND_AST_PRE_INC ? ZEND_PRE_INC_OBJ : ZEND_PRE_DEC_OBJ;
  	} else if (var_ast->kind == ZEND_AST_STATIC_PROP) {
  		zend_op *opline = zend_compile_static_prop(result, var_ast, BP_VAR_RW, 0, 0);
  		opline->opcode = ast->kind == ZEND_AST_PRE_INC ? ZEND_PRE_INC_STATIC_PROP : ZEND_PRE_DEC_STATIC_PROP;
  	} else {
  		znode var_node;
  		zend_compile_var(&var_node, var_ast, BP_VAR_RW, 0);
  		zend_emit_op(result, ast->kind == ZEND_AST_PRE_INC ? ZEND_PRE_INC : ZEND_PRE_DEC,
  			&var_node, NULL);
  	}
  }
  /* }}} */
  
  void zend_compile_cast(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *expr_ast = ast->child[0];
  	znode expr_node;
  	zend_op *opline;
  
  	zend_compile_expr(&expr_node, expr_ast);
  
  	opline = zend_emit_op_tmp(result, ZEND_CAST, &expr_node, NULL);
  	opline->extended_value = ast->attr;
  
  	if (ast->attr == IS_NULL) {
  		zend_error(E_COMPILE_ERROR, "The (unset) cast is no longer supported");
  	}
  }
  /* }}} */
  
  static void zend_compile_shorthand_conditional(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *cond_ast = ast->child[0];
  	zend_ast *false_ast = ast->child[2];
  
  	znode cond_node, false_node;
  	zend_op *opline_qm_assign;
  	uint32_t opnum_jmp_set;
  
  	ZEND_ASSERT(ast->child[1] == NULL);
  
  	zend_compile_expr(&cond_node, cond_ast);
  
  	opnum_jmp_set = get_next_op_number();
  	zend_emit_op_tmp(result, ZEND_JMP_SET, &cond_node, NULL);
  
  	zend_compile_expr(&false_node, false_ast);
  
  	opline_qm_assign = zend_emit_op_tmp(NULL, ZEND_QM_ASSIGN, &false_node, NULL);
  	SET_NODE(opline_qm_assign->result, result);
  
  	zend_update_jump_target_to_next(opnum_jmp_set);
  }
  /* }}} */
  
  void zend_compile_conditional(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *cond_ast = ast->child[0];
  	zend_ast *true_ast = ast->child[1];
  	zend_ast *false_ast = ast->child[2];
  
  	znode cond_node, true_node, false_node;
  	zend_op *opline_qm_assign2;
  	uint32_t opnum_jmpz, opnum_jmp;
  
  	if (!true_ast) {
  		zend_compile_shorthand_conditional(result, ast);
  		return;
  	}
  
  	zend_compile_expr(&cond_node, cond_ast);
  
  	opnum_jmpz = zend_emit_cond_jump(ZEND_JMPZ, &cond_node, 0);
  
  	zend_compile_expr(&true_node, true_ast);
  
  	zend_emit_op_tmp(result, ZEND_QM_ASSIGN, &true_node, NULL);
  
  	opnum_jmp = zend_emit_jump(0);
  
  	zend_update_jump_target_to_next(opnum_jmpz);
  
  	zend_compile_expr(&false_node, false_ast);
  
  	opline_qm_assign2 = zend_emit_op(NULL, ZEND_QM_ASSIGN, &false_node, NULL);
  	SET_NODE(opline_qm_assign2->result, result);
  
  	zend_update_jump_target_to_next(opnum_jmp);
  }
  /* }}} */
  
  void zend_compile_coalesce(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *expr_ast = ast->child[0];
  	zend_ast *default_ast = ast->child[1];
  
  	znode expr_node, default_node;
  	zend_op *opline;
  	uint32_t opnum;
  
  	zend_compile_var(&expr_node, expr_ast, BP_VAR_IS, 0);
  
  	opnum = get_next_op_number();
  	zend_emit_op_tmp(result, ZEND_COALESCE, &expr_node, NULL);
  
  	zend_compile_expr(&default_node, default_ast);
  
  	opline = zend_emit_op_tmp(NULL, ZEND_QM_ASSIGN, &default_node, NULL);
  	SET_NODE(opline->result, result);
  
  	opline = &CG(active_op_array)->opcodes[opnum];
  	opline->op2.opline_num = get_next_op_number();
  }
  /* }}} */
  
  static void znode_dtor(zval *zv) {
  	efree(Z_PTR_P(zv));
  }
  
  void zend_compile_assign_coalesce(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *var_ast = ast->child[0];
  	zend_ast *default_ast = ast->child[1];
  
  	znode var_node_is, var_node_w, default_node, assign_node, *node;
  	zend_op *opline;
  	uint32_t coalesce_opnum;
  	zend_bool need_frees = 0;
  
  	/* Remember expressions compiled during the initial BP_VAR_IS lookup,
  	 * to avoid double-evaluation when we compile again with BP_VAR_W. */
  	HashTable *orig_memoized_exprs = CG(memoized_exprs);
  	int orig_memoize_mode = CG(memoize_mode);
  
  	zend_ensure_writable_variable(var_ast);
  	if (is_this_fetch(var_ast)) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this");
  	}
  
  	ALLOC_HASHTABLE(CG(memoized_exprs));
  	zend_hash_init(CG(memoized_exprs), 0, NULL, znode_dtor, 0);
  
  	CG(memoize_mode) = ZEND_MEMOIZE_COMPILE;
  	zend_compile_var(&var_node_is, var_ast, BP_VAR_IS, 0);
  
  	coalesce_opnum = get_next_op_number();
  	zend_emit_op_tmp(result, ZEND_COALESCE, &var_node_is, NULL);
  
  	CG(memoize_mode) = ZEND_MEMOIZE_NONE;
  	zend_compile_expr(&default_node, default_ast);
  
  	CG(memoize_mode) = ZEND_MEMOIZE_FETCH;
  	zend_compile_var(&var_node_w, var_ast, BP_VAR_W, 0);
  
  	/* Reproduce some of the zend_compile_assign() opcode fixup logic here. */
  	opline = &CG(active_op_array)->opcodes[CG(active_op_array)->last-1];
  	switch (var_ast->kind) {
  		case ZEND_AST_VAR:
  			zend_emit_op(&assign_node, ZEND_ASSIGN, &var_node_w, &default_node);
  			break;
  		case ZEND_AST_STATIC_PROP:
  			opline->opcode = ZEND_ASSIGN_STATIC_PROP;
  			zend_emit_op_data(&default_node);
  			assign_node = var_node_w;
  			break;
  		case ZEND_AST_DIM:
  			opline->opcode = ZEND_ASSIGN_DIM;
  			zend_emit_op_data(&default_node);
  			assign_node = var_node_w;
  			break;
  		case ZEND_AST_PROP:
  			opline->opcode = ZEND_ASSIGN_OBJ;
  			zend_emit_op_data(&default_node);
  			assign_node = var_node_w;
  			break;
  		EMPTY_SWITCH_DEFAULT_CASE();
  	}
  
  	opline = zend_emit_op_tmp(NULL, ZEND_QM_ASSIGN, &assign_node, NULL);
  	SET_NODE(opline->result, result);
  
  	ZEND_HASH_FOREACH_PTR(CG(memoized_exprs), node) {
  		if (node->op_type == IS_TMP_VAR || node->op_type == IS_VAR) {
  			need_frees = 1;
  			break;
  		}
  	} ZEND_HASH_FOREACH_END();
  
  	/* Free DUPed expressions if there are any */
  	if (need_frees) {
  		uint32_t jump_opnum = zend_emit_jump(0);
  		zend_update_jump_target_to_next(coalesce_opnum);
  		ZEND_HASH_FOREACH_PTR(CG(memoized_exprs), node) {
  			if (node->op_type == IS_TMP_VAR || node->op_type == IS_VAR) {
  				zend_emit_op(NULL, ZEND_FREE, node, NULL);
  			}
  		} ZEND_HASH_FOREACH_END();
  		zend_update_jump_target_to_next(jump_opnum);
  	} else {
  		zend_update_jump_target_to_next(coalesce_opnum);
  	}
  
  	zend_hash_destroy(CG(memoized_exprs));
  	FREE_HASHTABLE(CG(memoized_exprs));
  	CG(memoized_exprs) = orig_memoized_exprs;
  	CG(memoize_mode) = orig_memoize_mode;
  }
  /* }}} */
  
  void zend_compile_print(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_op *opline;
  	zend_ast *expr_ast = ast->child[0];
  
  	znode expr_node;
  	zend_compile_expr(&expr_node, expr_ast);
  
  	opline = zend_emit_op(NULL, ZEND_ECHO, &expr_node, NULL);
  	opline->extended_value = 1;
  
  	result->op_type = IS_CONST;
  	ZVAL_LONG(&result->u.constant, 1);
  }
  /* }}} */
  
  void zend_compile_exit(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *expr_ast = ast->child[0];
  
  	if (expr_ast) {
  		znode expr_node;
  		zend_compile_expr(&expr_node, expr_ast);
  		zend_emit_op(NULL, ZEND_EXIT, &expr_node, NULL);
  	} else {
  		zend_emit_op(NULL, ZEND_EXIT, NULL, NULL);
  	}
  
  	result->op_type = IS_CONST;
  	ZVAL_BOOL(&result->u.constant, 1);
  }
  /* }}} */
  
  void zend_compile_yield(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *value_ast = ast->child[0];
  	zend_ast *key_ast = ast->child[1];
  
  	znode value_node, key_node;
  	znode *value_node_ptr = NULL, *key_node_ptr = NULL;
  	zend_op *opline;
  	zend_bool returns_by_ref = (CG(active_op_array)->fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0;
  
  	zend_mark_function_as_generator();
  
  	if (key_ast) {
  		zend_compile_expr(&key_node, key_ast);
  		key_node_ptr = &key_node;
  	}
  
  	if (value_ast) {
  		if (returns_by_ref && zend_is_variable(value_ast)) {
  			zend_compile_var(&value_node, value_ast, BP_VAR_W, 1);
  		} else {
  			zend_compile_expr(&value_node, value_ast);
  		}
  		value_node_ptr = &value_node;
  	}
  
  	opline = zend_emit_op(result, ZEND_YIELD, value_node_ptr, key_node_ptr);
  
  	if (value_ast && returns_by_ref && zend_is_call(value_ast)) {
  		opline->extended_value = ZEND_RETURNS_FUNCTION;
  	}
  }
  /* }}} */
  
  void zend_compile_yield_from(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *expr_ast = ast->child[0];
  	znode expr_node;
  
  	zend_mark_function_as_generator();
  
  	if (CG(active_op_array)->fn_flags & ZEND_ACC_RETURN_REFERENCE) {
  		zend_error_noreturn(E_COMPILE_ERROR,
  			"Cannot use \"yield from\" inside a by-reference generator");
  	}
  
  	zend_compile_expr(&expr_node, expr_ast);
  	zend_emit_op_tmp(result, ZEND_YIELD_FROM, &expr_node, NULL);
  }
  /* }}} */
  
  void zend_compile_instanceof(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *obj_ast = ast->child[0];
  	zend_ast *class_ast = ast->child[1];
  
  	znode obj_node, class_node;
  	zend_op *opline;
  
  	zend_compile_expr(&obj_node, obj_ast);
  	if (obj_node.op_type == IS_CONST) {
  		zend_do_free(&obj_node);
  		result->op_type = IS_CONST;
  		ZVAL_FALSE(&result->u.constant);
  		return;
  	}
  
  	zend_compile_class_ref(&class_node, class_ast,
  		ZEND_FETCH_CLASS_NO_AUTOLOAD | ZEND_FETCH_CLASS_EXCEPTION);
  
  	opline = zend_emit_op_tmp(result, ZEND_INSTANCEOF, &obj_node, NULL);
  
  	if (class_node.op_type == IS_CONST) {
  		opline->op2_type = IS_CONST;
  		opline->op2.constant = zend_add_class_name_literal(
  			Z_STR(class_node.u.constant));
  		opline->extended_value = zend_alloc_cache_slot();
  	} else {
  		SET_NODE(opline->op2, &class_node);
  	}
  }
  /* }}} */
  
  void zend_compile_include_or_eval(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *expr_ast = ast->child[0];
  	znode expr_node;
  	zend_op *opline;
  
  	zend_do_extended_fcall_begin();
  	zend_compile_expr(&expr_node, expr_ast);
  
  	opline = zend_emit_op(result, ZEND_INCLUDE_OR_EVAL, &expr_node, NULL);
  	opline->extended_value = ast->attr;
  
  	zend_do_extended_fcall_end();
  }
  /* }}} */
  
  void zend_compile_isset_or_empty(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *var_ast = ast->child[0];
  
  	znode var_node;
  	zend_op *opline = NULL;
  
  	ZEND_ASSERT(ast->kind == ZEND_AST_ISSET || ast->kind == ZEND_AST_EMPTY);
  
  	if (!zend_is_variable(var_ast)) {
  		if (ast->kind == ZEND_AST_EMPTY) {
  			/* empty(expr) can be transformed to !expr */
  			zend_ast *not_ast = zend_ast_create_ex(ZEND_AST_UNARY_OP, ZEND_BOOL_NOT, var_ast);
  			zend_compile_expr(result, not_ast);
  			return;
  		} else {
  			zend_error_noreturn(E_COMPILE_ERROR,
  				"Cannot use isset() on the result of an expression "
  				"(you can use \"null !== expression\" instead)");
  		}
  	}
  
  	switch (var_ast->kind) {
  		case ZEND_AST_VAR:
  			if (is_this_fetch(var_ast)) {
  				opline = zend_emit_op(result, ZEND_ISSET_ISEMPTY_THIS, NULL, NULL);
  			} else if (zend_try_compile_cv(&var_node, var_ast) == SUCCESS) {
  				opline = zend_emit_op(result, ZEND_ISSET_ISEMPTY_CV, &var_node, NULL);
  			} else {
  				opline = zend_compile_simple_var_no_cv(result, var_ast, BP_VAR_IS, 0);
  				opline->opcode = ZEND_ISSET_ISEMPTY_VAR;
  			}
  			break;
  		case ZEND_AST_DIM:
  			opline = zend_compile_dim(result, var_ast, BP_VAR_IS);
  			opline->opcode = ZEND_ISSET_ISEMPTY_DIM_OBJ;
  			break;
  		case ZEND_AST_PROP:
  			opline = zend_compile_prop(result, var_ast, BP_VAR_IS, 0);
  			opline->opcode = ZEND_ISSET_ISEMPTY_PROP_OBJ;
  			break;
  		case ZEND_AST_STATIC_PROP:
  			opline = zend_compile_static_prop(result, var_ast, BP_VAR_IS, 0, 0);
  			opline->opcode = ZEND_ISSET_ISEMPTY_STATIC_PROP;
  			break;
  		EMPTY_SWITCH_DEFAULT_CASE()
  	}
  
  	result->op_type = opline->result_type = IS_TMP_VAR;
  	if (!(ast->kind == ZEND_AST_ISSET)) {
  		opline->extended_value |= ZEND_ISEMPTY;
  	}
  }
  /* }}} */
  
  void zend_compile_silence(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *expr_ast = ast->child[0];
  	znode silence_node;
  
  	zend_emit_op_tmp(&silence_node, ZEND_BEGIN_SILENCE, NULL, NULL);
  
  	if (expr_ast->kind == ZEND_AST_VAR) {
  		/* For @$var we need to force a FETCH instruction, otherwise the CV access will
  		 * happen outside the silenced section. */
  		zend_compile_simple_var_no_cv(result, expr_ast, BP_VAR_R, 0 );
  	} else {
  		zend_compile_expr(result, expr_ast);
  	}
  
  	zend_emit_op(NULL, ZEND_END_SILENCE, &silence_node, NULL);
  }
  /* }}} */
  
  void zend_compile_shell_exec(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *expr_ast = ast->child[0];
  
  	zval fn_name;
  	zend_ast *name_ast, *args_ast, *call_ast;
  
  	ZVAL_STRING(&fn_name, "shell_exec");
  	name_ast = zend_ast_create_zval(&fn_name);
  	args_ast = zend_ast_create_list(1, ZEND_AST_ARG_LIST, expr_ast);
  	call_ast = zend_ast_create(ZEND_AST_CALL, name_ast, args_ast);
  
  	zend_compile_expr(result, call_ast);
  
  	zval_ptr_dtor(&fn_name);
  }
  /* }}} */
  
  void zend_compile_array(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast_list *list = zend_ast_get_list(ast);
  	zend_op *opline;
  	uint32_t i, opnum_init = -1;
  	zend_bool packed = 1;
  
  	if (zend_try_ct_eval_array(&result->u.constant, ast)) {
  		result->op_type = IS_CONST;
  		return;
  	}
  
  	/* Empty arrays are handled at compile-time */
  	ZEND_ASSERT(list->children > 0);
  
  	for (i = 0; i < list->children; ++i) {
  		zend_ast *elem_ast = list->child[i];
  		zend_ast *value_ast, *key_ast;
  		zend_bool by_ref;
  		znode value_node, key_node, *key_node_ptr = NULL;
  
  		if (elem_ast == NULL) {
  			zend_error(E_COMPILE_ERROR, "Cannot use empty array elements in arrays");
  		}
  
  		value_ast = elem_ast->child[0];
  		key_ast = elem_ast->child[1];
  		by_ref = elem_ast->attr;
  
  		if (key_ast) {
  			zend_compile_expr(&key_node, key_ast);
  			zend_handle_numeric_op(&key_node);
  			key_node_ptr = &key_node;
  		}
  
  		if (by_ref) {
  			zend_ensure_writable_variable(value_ast);
  			zend_compile_var(&value_node, value_ast, BP_VAR_W, 1);
  		} else {
  			zend_compile_expr(&value_node, value_ast);
  		}
  
  		if (i == 0) {
  			opnum_init = get_next_op_number();
  			opline = zend_emit_op_tmp(result, ZEND_INIT_ARRAY, &value_node, key_node_ptr);
  			opline->extended_value = list->children << ZEND_ARRAY_SIZE_SHIFT;
  		} else {
  			opline = zend_emit_op(NULL, ZEND_ADD_ARRAY_ELEMENT,
  				&value_node, key_node_ptr);
  			SET_NODE(opline->result, result);
  		}
  		opline->extended_value |= by_ref;
  
  		if (key_ast && key_node.op_type == IS_CONST && Z_TYPE(key_node.u.constant) == IS_STRING) {
  			packed = 0;
  		}
  	}
  
  	/* Add a flag to INIT_ARRAY if we know this array cannot be packed */
  	if (!packed) {
  		ZEND_ASSERT(opnum_init != (uint32_t)-1);
  		opline = &CG(active_op_array)->opcodes[opnum_init];
  		opline->extended_value |= ZEND_ARRAY_NOT_PACKED;
  	}
  }
  /* }}} */
  
  void zend_compile_const(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *name_ast = ast->child[0];
  
  	zend_op *opline;
  
  	zend_bool is_fully_qualified;
  	zend_string *orig_name = zend_ast_get_str(name_ast);
  	zend_string *resolved_name = zend_resolve_const_name(orig_name, name_ast->attr, &is_fully_qualified);
  
  	if (zend_string_equals_literal(resolved_name, "__COMPILER_HALT_OFFSET__") || (name_ast->attr != ZEND_NAME_RELATIVE && zend_string_equals_literal(orig_name, "__COMPILER_HALT_OFFSET__"))) {
  		zend_ast *last = CG(ast);
  
  		while (last->kind == ZEND_AST_STMT_LIST) {
  			zend_ast_list *list = zend_ast_get_list(last);
  			last = list->child[list->children-1];
  		}
  		if (last->kind == ZEND_AST_HALT_COMPILER) {
  			result->op_type = IS_CONST;
  			ZVAL_LONG(&result->u.constant, Z_LVAL_P(zend_ast_get_zval(last->child[0])));
  			zend_string_release_ex(resolved_name, 0);
  			return;
  		}
  	}
  
  	if (zend_try_ct_eval_const(&result->u.constant, resolved_name, is_fully_qualified)) {
  		result->op_type = IS_CONST;
  		zend_string_release_ex(resolved_name, 0);
  		return;
  	}
  
  	opline = zend_emit_op_tmp(result, ZEND_FETCH_CONSTANT, NULL, NULL);
  	opline->op2_type = IS_CONST;
  
  	if (is_fully_qualified || !FC(current_namespace)) {
  		opline->op2.constant = zend_add_const_name_literal(
  			resolved_name, 0);
  	} else {
  		opline->op1.num = IS_CONSTANT_UNQUALIFIED_IN_NAMESPACE;
  		opline->op2.constant = zend_add_const_name_literal(
  			resolved_name, 1);
  	}
  	opline->extended_value = zend_alloc_cache_slot();
  }
  /* }}} */
  
  void zend_compile_class_const(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *class_ast = ast->child[0];
  	zend_ast *const_ast = ast->child[1];
  
  	znode class_node, const_node;
  	zend_op *opline;
  
  	zend_eval_const_expr(&ast->child[0]);
  	zend_eval_const_expr(&ast->child[1]);
  
  	class_ast = ast->child[0];
  	const_ast = ast->child[1];
  
  	if (class_ast->kind == ZEND_AST_ZVAL) {
  		zend_string *resolved_name;
  
  		resolved_name = zend_resolve_class_name_ast(class_ast);
  		if (const_ast->kind == ZEND_AST_ZVAL && zend_try_ct_eval_class_const(&result->u.constant, resolved_name, zend_ast_get_str(const_ast))) {
  			result->op_type = IS_CONST;
  			zend_string_release_ex(resolved_name, 0);
  			return;
  		}
  		zend_string_release_ex(resolved_name, 0);
  	}
  
  	zend_compile_class_ref(&class_node, class_ast, ZEND_FETCH_CLASS_EXCEPTION);
  
  	zend_compile_expr(&const_node, const_ast);
  
  	opline = zend_emit_op_tmp(result, ZEND_FETCH_CLASS_CONSTANT, NULL, &const_node);
  
  	zend_set_class_name_op1(opline, &class_node);
  
  	opline->extended_value = zend_alloc_cache_slots(2);
  }
  /* }}} */
  
  void zend_compile_class_name(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *class_ast = ast->child[0];
  	zend_op *opline;
  
  	if (zend_try_compile_const_expr_resolve_class_name(&result->u.constant, class_ast)) {
  		result->op_type = IS_CONST;
  		return;
  	}
  
  	opline = zend_emit_op_tmp(result, ZEND_FETCH_CLASS_NAME, NULL, NULL);
  	opline->op1.num = zend_get_class_fetch_type(zend_ast_get_str(class_ast));
  }
  /* }}} */
  
  static zend_op *zend_compile_rope_add_ex(zend_op *opline, znode *result, uint32_t num, znode *elem_node) /* {{{ */
  {
  	if (num == 0) {
  		result->op_type = IS_TMP_VAR;
  		result->u.op.var = -1;
  		opline->opcode = ZEND_ROPE_INIT;
  	} else {
  		opline->opcode = ZEND_ROPE_ADD;
  		SET_NODE(opline->op1, result);
  	}
  	SET_NODE(opline->op2, elem_node);
  	SET_NODE(opline->result, result);
  	opline->extended_value = num;
  	return opline;
  }
  /* }}} */
  
  static zend_op *zend_compile_rope_add(znode *result, uint32_t num, znode *elem_node) /* {{{ */
  {
  	zend_op *opline = get_next_op();
  
  	if (num == 0) {
  		result->op_type = IS_TMP_VAR;
  		result->u.op.var = -1;
  		opline->opcode = ZEND_ROPE_INIT;
  	} else {
  		opline->opcode = ZEND_ROPE_ADD;
  		SET_NODE(opline->op1, result);
  	}
  	SET_NODE(opline->op2, elem_node);
  	SET_NODE(opline->result, result);
  	opline->extended_value = num;
  	return opline;
  }
  /* }}} */
  
  static void zend_compile_encaps_list(znode *result, zend_ast *ast) /* {{{ */
  {
  	uint32_t i, j;
  	uint32_t rope_init_lineno = -1;
  	zend_op *opline = NULL, *init_opline;
  	znode elem_node, last_const_node;
  	zend_ast_list *list = zend_ast_get_list(ast);
  	uint32_t reserved_op_number = -1;
  
  	ZEND_ASSERT(list->children > 0);
  
  	j = 0;
  	last_const_node.op_type = IS_UNUSED;
  	for (i = 0; i < list->children; i++) {
  		zend_compile_expr(&elem_node, list->child[i]);
  
  		if (elem_node.op_type == IS_CONST) {
  			convert_to_string(&elem_node.u.constant);
  
  			if (Z_STRLEN(elem_node.u.constant) == 0) {
  				zval_ptr_dtor(&elem_node.u.constant);
  			} else if (last_const_node.op_type == IS_CONST) {
  				concat_function(&last_const_node.u.constant, &last_const_node.u.constant, &elem_node.u.constant);
  				zval_ptr_dtor(&elem_node.u.constant);
  			} else {
  				last_const_node.op_type = IS_CONST;
  				ZVAL_COPY_VALUE(&last_const_node.u.constant, &elem_node.u.constant);
  				/* Reserve place for ZEND_ROPE_ADD instruction */
  				reserved_op_number = get_next_op_number();
  				opline = get_next_op();
  				opline->opcode = ZEND_NOP;
  			}
  			continue;
  		} else {
  			if (j == 0) {
  				if (last_const_node.op_type == IS_CONST) {
  					rope_init_lineno = reserved_op_number;
  				} else {
  					rope_init_lineno = get_next_op_number();
  				}
  			}
  			if (last_const_node.op_type == IS_CONST) {
  				opline = &CG(active_op_array)->opcodes[reserved_op_number];
  				zend_compile_rope_add_ex(opline, result, j++, &last_const_node);
  				last_const_node.op_type = IS_UNUSED;
  			}
  			opline = zend_compile_rope_add(result, j++, &elem_node);
  		}
  	}
  
  	if (j == 0) {
  		result->op_type = IS_CONST;
  		if (last_const_node.op_type == IS_CONST) {
  			ZVAL_COPY_VALUE(&result->u.constant, &last_const_node.u.constant);
  		} else {
  			ZVAL_EMPTY_STRING(&result->u.constant);
  			/* empty string */
  		}
  		CG(active_op_array)->last = reserved_op_number - 1;
  		return;
  	} else if (last_const_node.op_type == IS_CONST) {
  		opline = &CG(active_op_array)->opcodes[reserved_op_number];
  		opline = zend_compile_rope_add_ex(opline, result, j++, &last_const_node);
  	}
  	init_opline = CG(active_op_array)->opcodes + rope_init_lineno;
  	if (j == 1) {
  		if (opline->op2_type == IS_CONST) {
  			GET_NODE(result, opline->op2);
  			MAKE_NOP(opline);
  		} else {
  			opline->opcode = ZEND_CAST;
  			opline->extended_value = IS_STRING;
  			opline->op1_type = opline->op2_type;
  			opline->op1 = opline->op2;
  			opline->result_type = IS_TMP_VAR;
  			opline->result.var = get_temporary_variable();
  			SET_UNUSED(opline->op2);
  			GET_NODE(result, opline->result);
  		}
  	} else if (j == 2) {
  		opline->opcode = ZEND_FAST_CONCAT;
  		opline->extended_value = 0;
  		opline->op1_type = init_opline->op2_type;
  		opline->op1 = init_opline->op2;
  		opline->result_type = IS_TMP_VAR;
  		opline->result.var = get_temporary_variable();
  		MAKE_NOP(init_opline);
  		GET_NODE(result, opline->result);
  	} else {
  		uint32_t var;
  
  		init_opline->extended_value = j;
  		opline->opcode = ZEND_ROPE_END;
  		opline->result.var = get_temporary_variable();
  		var = opline->op1.var = get_temporary_variable();
  		GET_NODE(result, opline->result);
  
  		/* Allocates the necessary number of zval slots to keep the rope */
  		i = ((j * sizeof(zend_string*)) + (sizeof(zval) - 1)) / sizeof(zval);
  		while (i > 1) {
  			get_temporary_variable();
  			i--;
  		}
  
  		/* Update all the previous opcodes to use the same variable */
  		while (opline != init_opline) {
  			opline--;
  			if (opline->opcode == ZEND_ROPE_ADD &&
  			    opline->result.var == (uint32_t)-1) {
  				opline->op1.var = var;
  				opline->result.var = var;
  			} else if (opline->opcode == ZEND_ROPE_INIT &&
  			           opline->result.var == (uint32_t)-1) {
  				opline->result.var = var;
  			}
  		}
  	}
  }
  /* }}} */
  
  void zend_compile_magic_const(znode *result, zend_ast *ast) /* {{{ */
  {
  	zend_op *opline;
  
  	if (zend_try_ct_eval_magic_const(&result->u.constant, ast)) {
  		result->op_type = IS_CONST;
  		return;
  	}
  
  	ZEND_ASSERT(ast->attr == T_CLASS_C &&
  	            CG(active_class_entry) &&
  	            (CG(active_class_entry)->ce_flags & ZEND_ACC_TRAIT) != 0);
  
  	opline = zend_emit_op_tmp(result, ZEND_FETCH_CLASS_NAME, NULL, NULL);
  	opline->op1.num = ZEND_FETCH_CLASS_SELF;
  }
  /* }}} */
  
  zend_bool zend_is_allowed_in_const_expr(zend_ast_kind kind) /* {{{ */
  {
  	return kind == ZEND_AST_ZVAL || kind == ZEND_AST_BINARY_OP
  		|| kind == ZEND_AST_GREATER || kind == ZEND_AST_GREATER_EQUAL
  		|| kind == ZEND_AST_AND || kind == ZEND_AST_OR
  		|| kind == ZEND_AST_UNARY_OP
  		|| kind == ZEND_AST_UNARY_PLUS || kind == ZEND_AST_UNARY_MINUS
  		|| kind == ZEND_AST_CONDITIONAL || kind == ZEND_AST_DIM
  		|| kind == ZEND_AST_ARRAY || kind == ZEND_AST_ARRAY_ELEM
  		|| kind == ZEND_AST_CONST || kind == ZEND_AST_CLASS_CONST
  		|| kind == ZEND_AST_CLASS_NAME
  		|| kind == ZEND_AST_MAGIC_CONST || kind == ZEND_AST_COALESCE;
  }
  /* }}} */
  
  void zend_compile_const_expr_class_const(zend_ast **ast_ptr) /* {{{ */
  {
  	zend_ast *ast = *ast_ptr;
  	zend_ast *class_ast = ast->child[0];
  	zend_ast *const_ast = ast->child[1];
  	zend_string *class_name;
  	zend_string *const_name = zend_ast_get_str(const_ast);
  	zend_string *name;
  	int fetch_type;
  
  	if (class_ast->kind != ZEND_AST_ZVAL) {
  		zend_error_noreturn(E_COMPILE_ERROR,
  			"Dynamic class names are not allowed in compile-time class constant references");
  	}
  
  	class_name = zend_ast_get_str(class_ast);
  	fetch_type = zend_get_class_fetch_type(class_name);
  
  	if (ZEND_FETCH_CLASS_STATIC == fetch_type) {
  		zend_error_noreturn(E_COMPILE_ERROR,
  			"\"static::\" is not allowed in compile-time constants");
  	}
  
  	if (ZEND_FETCH_CLASS_DEFAULT == fetch_type) {
  		class_name = zend_resolve_class_name_ast(class_ast);
  	} else {
  		zend_string_addref(class_name);
  	}
  
  	name = zend_concat3(
  		ZSTR_VAL(class_name), ZSTR_LEN(class_name), "::", 2, ZSTR_VAL(const_name), ZSTR_LEN(const_name));
  
  	zend_ast_destroy(ast);
  	zend_string_release_ex(class_name, 0);
  
  	*ast_ptr = zend_ast_create_constant(name, fetch_type | ZEND_FETCH_CLASS_EXCEPTION);
  }
  /* }}} */
  
  void zend_compile_const_expr_class_name(zend_ast **ast_ptr) /* {{{ */
  {
  	zend_ast *ast = *ast_ptr;
  	zend_ast *class_ast = ast->child[0];
  	zend_string *class_name = zend_ast_get_str(class_ast);
  	uint32_t fetch_type = zend_get_class_fetch_type(class_name);
  
  	switch (fetch_type) {
  		case ZEND_FETCH_CLASS_SELF:
  		case ZEND_FETCH_CLASS_PARENT:
  			/* For the const-eval representation store the fetch type instead of the name. */
  			zend_string_release(class_name);
  			ast->child[0] = NULL;
  			ast->attr = fetch_type;
  			return;
  		case ZEND_FETCH_CLASS_STATIC:
  			zend_error_noreturn(E_COMPILE_ERROR,
  				"static::class cannot be used for compile-time class name resolution");
  			return;
  		EMPTY_SWITCH_DEFAULT_CASE()
  	}
  }
  
  void zend_compile_const_expr_const(zend_ast **ast_ptr) /* {{{ */
  {
  	zend_ast *ast = *ast_ptr;
  	zend_ast *name_ast = ast->child[0];
  	zend_string *orig_name = zend_ast_get_str(name_ast);
  	zend_bool is_fully_qualified;
  	zval result;
  	zend_string *resolved_name;
  
  	resolved_name = zend_resolve_const_name(
  		orig_name, name_ast->attr, &is_fully_qualified);
  
  	if (zend_try_ct_eval_const(&result, resolved_name, is_fully_qualified)) {
  		zend_string_release_ex(resolved_name, 0);
  		zend_ast_destroy(ast);
  		*ast_ptr = zend_ast_create_zval(&result);
  		return;
  	}
  
  	zend_ast_destroy(ast);
  	*ast_ptr = zend_ast_create_constant(resolved_name,
  		!is_fully_qualified && FC(current_namespace) ? IS_CONSTANT_UNQUALIFIED_IN_NAMESPACE : 0);
  }
  /* }}} */
  
  void zend_compile_const_expr_magic_const(zend_ast **ast_ptr) /* {{{ */
  {
  	zend_ast *ast = *ast_ptr;
  
  	/* Other cases already resolved by constant folding */
  	ZEND_ASSERT(ast->attr == T_CLASS_C);
  
  	zend_ast_destroy(ast);
  	*ast_ptr = zend_ast_create(ZEND_AST_CONSTANT_CLASS);
  }
  /* }}} */
  
  void zend_compile_const_expr(zend_ast **ast_ptr) /* {{{ */
  {
  	zend_ast *ast = *ast_ptr;
  	if (ast == NULL || ast->kind == ZEND_AST_ZVAL) {
  		return;
  	}
  
  	if (!zend_is_allowed_in_const_expr(ast->kind)) {
  		zend_error_noreturn(E_COMPILE_ERROR, "Constant expression contains invalid operations");
  	}
  
  	switch (ast->kind) {
  		case ZEND_AST_CLASS_CONST:
  			zend_compile_const_expr_class_const(ast_ptr);
  			break;
  		case ZEND_AST_CLASS_NAME:
  			zend_compile_const_expr_class_name(ast_ptr);
  			break;
  		case ZEND_AST_CONST:
  			zend_compile_const_expr_const(ast_ptr);
  			break;
  		case ZEND_AST_MAGIC_CONST:
  			zend_compile_const_expr_magic_const(ast_ptr);
  			break;
  		default:
  			zend_ast_apply(ast, zend_compile_const_expr);
  			break;
  	}
  }
  /* }}} */
  
  void zend_const_expr_to_zval(zval *result, zend_ast *ast) /* {{{ */
  {
  	zend_ast *orig_ast = ast;
  	zend_eval_const_expr(&ast);
  	zend_compile_const_expr(&ast);
  	if (ast->kind == ZEND_AST_ZVAL) {
  		ZVAL_COPY_VALUE(result, zend_ast_get_zval(ast));
  	} else {
  		ZVAL_AST(result, zend_ast_copy(ast));
  		/* destroy the ast here, it might have been replaced */
  		zend_ast_destroy(ast);
  	}
  
  	/* Kill this branch of the original AST, as it was already destroyed.
  	 * It would be nice to find a better solution to this problem in the
  	 * future. */
  	orig_ast->kind = 0;
  }
  /* }}} */
  
  /* Same as compile_stmt, but with early binding */
  void zend_compile_top_stmt(zend_ast *ast) /* {{{ */
  {
  	if (!ast) {
  		return;
  	}
  
  	if (ast->kind == ZEND_AST_STMT_LIST) {
  		zend_ast_list *list = zend_ast_get_list(ast);
  		uint32_t i;
  		for (i = 0; i < list->children; ++i) {
  			zend_compile_top_stmt(list->child[i]);
  		}
  		return;
  	}
  
  	if (ast->kind == ZEND_AST_FUNC_DECL) {
  		CG(zend_lineno) = ast->lineno;
  		zend_compile_func_decl(NULL, ast, 1);
  		CG(zend_lineno) = ((zend_ast_decl *) ast)->end_lineno;
  	} else if (ast->kind == ZEND_AST_CLASS) {
  		CG(zend_lineno) = ast->lineno;
  		zend_compile_class_decl(ast, 1);
  		CG(zend_lineno) = ((zend_ast_decl *) ast)->end_lineno;
  	} else {
  		zend_compile_stmt(ast);
  	}
  	if (ast->kind != ZEND_AST_NAMESPACE && ast->kind != ZEND_AST_HALT_COMPILER) {
  		zend_verify_namespace();
  	}
  }
  /* }}} */
  
  void zend_compile_stmt(zend_ast *ast) /* {{{ */
  {
  	if (!ast) {
  		return;
  	}
  
  	CG(zend_lineno) = ast->lineno;
  
  	if ((CG(compiler_options) & ZEND_COMPILE_EXTENDED_STMT) && !zend_is_unticked_stmt(ast)) {
  		zend_do_extended_stmt();
  	}
  
  	switch (ast->kind) {
  		case ZEND_AST_STMT_LIST:
  			zend_compile_stmt_list(ast);
  			break;
  		case ZEND_AST_GLOBAL:
  			zend_compile_global_var(ast);
  			break;
  		case ZEND_AST_STATIC:
  			zend_compile_static_var(ast);
  			break;
  		case ZEND_AST_UNSET:
  			zend_compile_unset(ast);
  			break;
  		case ZEND_AST_RETURN:
  			zend_compile_return(ast);
  			break;
  		case ZEND_AST_ECHO:
  			zend_compile_echo(ast);
  			break;
  		case ZEND_AST_THROW:
  			zend_compile_throw(ast);
  			break;
  		case ZEND_AST_BREAK:
  		case ZEND_AST_CONTINUE:
  			zend_compile_break_continue(ast);
  			break;
  		case ZEND_AST_GOTO:
  			zend_compile_goto(ast);
  			break;
  		case ZEND_AST_LABEL:
  			zend_compile_label(ast);
  			break;
  		case ZEND_AST_WHILE:
  			zend_compile_while(ast);
  			break;
  		case ZEND_AST_DO_WHILE:
  			zend_compile_do_while(ast);
  			break;
  		case ZEND_AST_FOR:
  			zend_compile_for(ast);
  			break;
  		case ZEND_AST_FOREACH:
  			zend_compile_foreach(ast);
  			break;
  		case ZEND_AST_IF:
  			zend_compile_if(ast);
  			break;
  		case ZEND_AST_SWITCH:
  			zend_compile_switch(ast);
  			break;
  		case ZEND_AST_TRY:
  			zend_compile_try(ast);
  			break;
  		case ZEND_AST_DECLARE:
  			zend_compile_declare(ast);
  			break;
  		case ZEND_AST_FUNC_DECL:
  		case ZEND_AST_METHOD:
  			zend_compile_func_decl(NULL, ast, 0);
  			break;
  		case ZEND_AST_PROP_GROUP:
  			zend_compile_prop_group(ast);
  			break;
  		case ZEND_AST_CLASS_CONST_DECL:
  			zend_compile_class_const_decl(ast);
  			break;
  		case ZEND_AST_USE_TRAIT:
  			zend_compile_use_trait(ast);
  			break;
  		case ZEND_AST_CLASS:
  			zend_compile_class_decl(ast, 0);
  			break;
  		case ZEND_AST_GROUP_USE:
  			zend_compile_group_use(ast);
  			break;
  		case ZEND_AST_USE:
  			zend_compile_use(ast);
  			break;
  		case ZEND_AST_CONST_DECL:
  			zend_compile_const_decl(ast);
  			break;
  		case ZEND_AST_NAMESPACE:
  			zend_compile_namespace(ast);
  			break;
  		case ZEND_AST_HALT_COMPILER:
  			zend_compile_halt_compiler(ast);
  			break;
  		default:
  		{
  			znode result;
  			zend_compile_expr(&result, ast);
  			zend_do_free(&result);
  		}
  	}
  
  	if (FC(declarables).ticks && !zend_is_unticked_stmt(ast)) {
  		zend_emit_tick();
  	}
  }
  /* }}} */
  
  void zend_compile_expr(znode *result, zend_ast *ast) /* {{{ */
  {
  	/* CG(zend_lineno) = ast->lineno; */
  	CG(zend_lineno) = zend_ast_get_lineno(ast);
  
  	if (CG(memoize_mode) != ZEND_MEMOIZE_NONE) {
  		zend_compile_memoized_expr(result, ast);
  		return;
  	}
  
  	switch (ast->kind) {
  		case ZEND_AST_ZVAL:
  			ZVAL_COPY(&result->u.constant, zend_ast_get_zval(ast));
  			result->op_type = IS_CONST;
  			return;
  		case ZEND_AST_ZNODE:
  			*result = *zend_ast_get_znode(ast);
  			return;
  		case ZEND_AST_VAR:
  		case ZEND_AST_DIM:
  		case ZEND_AST_PROP:
  		case ZEND_AST_STATIC_PROP:
  		case ZEND_AST_CALL:
  		case ZEND_AST_METHOD_CALL:
  		case ZEND_AST_STATIC_CALL:
  			zend_compile_var(result, ast, BP_VAR_R, 0);
  			return;
  		case ZEND_AST_ASSIGN:
  			zend_compile_assign(result, ast);
  			return;
  		case ZEND_AST_ASSIGN_REF:
  			zend_compile_assign_ref(result, ast);
  			return;
  		case ZEND_AST_NEW:
  			zend_compile_new(result, ast);
  			return;
  		case ZEND_AST_CLONE:
  			zend_compile_clone(result, ast);
  			return;
  		case ZEND_AST_ASSIGN_OP:
  			zend_compile_compound_assign(result, ast);
  			return;
  		case ZEND_AST_BINARY_OP:
  			zend_compile_binary_op(result, ast);
  			return;
  		case ZEND_AST_GREATER:
  		case ZEND_AST_GREATER_EQUAL:
  			zend_compile_greater(result, ast);
  			return;
  		case ZEND_AST_UNARY_OP:
  			zend_compile_unary_op(result, ast);
  			return;
  		case ZEND_AST_UNARY_PLUS:
  		case ZEND_AST_UNARY_MINUS:
  			zend_compile_unary_pm(result, ast);
  			return;
  		case ZEND_AST_AND:
  		case ZEND_AST_OR:
  			zend_compile_short_circuiting(result, ast);
  			return;
  		case ZEND_AST_POST_INC:
  		case ZEND_AST_POST_DEC:
  			zend_compile_post_incdec(result, ast);
  			return;
  		case ZEND_AST_PRE_INC:
  		case ZEND_AST_PRE_DEC:
  			zend_compile_pre_incdec(result, ast);
  			return;
  		case ZEND_AST_CAST:
  			zend_compile_cast(result, ast);
  			return;
  		case ZEND_AST_CONDITIONAL:
  			zend_compile_conditional(result, ast);
  			return;
  		case ZEND_AST_COALESCE:
  			zend_compile_coalesce(result, ast);
  			return;
  		case ZEND_AST_ASSIGN_COALESCE:
  			zend_compile_assign_coalesce(result, ast);
  			return;
  		case ZEND_AST_PRINT:
  			zend_compile_print(result, ast);
  			return;
  		case ZEND_AST_EXIT:
  			zend_compile_exit(result, ast);
  			return;
  		case ZEND_AST_YIELD:
  			zend_compile_yield(result, ast);
  			return;
  		case ZEND_AST_YIELD_FROM:
  			zend_compile_yield_from(result, ast);
  			return;
  		case ZEND_AST_INSTANCEOF:
  			zend_compile_instanceof(result, ast);
  			return;
  		case ZEND_AST_INCLUDE_OR_EVAL:
  			zend_compile_include_or_eval(result, ast);
  			return;
  		case ZEND_AST_ISSET:
  		case ZEND_AST_EMPTY:
  			zend_compile_isset_or_empty(result, ast);
  			return;
  		case ZEND_AST_SILENCE:
  			zend_compile_silence(result, ast);
  			return;
  		case ZEND_AST_SHELL_EXEC:
  			zend_compile_shell_exec(result, ast);
  			return;
  		case ZEND_AST_ARRAY:
  			zend_compile_array(result, ast);
  			return;
  		case ZEND_AST_CONST:
  			zend_compile_const(result, ast);
  			return;
  		case ZEND_AST_CLASS_CONST:
  			zend_compile_class_const(result, ast);
  			return;
  		case ZEND_AST_CLASS_NAME:
  			zend_compile_class_name(result, ast);
  			return;
  		case ZEND_AST_ENCAPS_LIST:
  			zend_compile_encaps_list(result, ast);
  			return;
  		case ZEND_AST_MAGIC_CONST:
  			zend_compile_magic_const(result, ast);
  			return;
  		case ZEND_AST_CLOSURE:
  			zend_compile_func_decl(result, ast, 0);
  			return;
  		default:
  			ZEND_ASSERT(0 /* not supported */);
  	}
  }
  /* }}} */
  
  zend_op *zend_compile_var(znode *result, zend_ast *ast, uint32_t type, int by_ref) /* {{{ */
  {
  	CG(zend_lineno) = zend_ast_get_lineno(ast);
  
  	switch (ast->kind) {
  		case ZEND_AST_VAR:
  			return zend_compile_simple_var(result, ast, type, 0);
  		case ZEND_AST_DIM:
  			return zend_compile_dim(result, ast, type);
  		case ZEND_AST_PROP:
  			return zend_compile_prop(result, ast, type, by_ref);
  		case ZEND_AST_STATIC_PROP:
  			return zend_compile_static_prop(result, ast, type, by_ref, 0);
  		case ZEND_AST_CALL:
  			zend_compile_call(result, ast, type);
  			return NULL;
  		case ZEND_AST_METHOD_CALL:
  			zend_compile_method_call(result, ast, type);
  			return NULL;
  		case ZEND_AST_STATIC_CALL:
  			zend_compile_static_call(result, ast, type);
  			return NULL;
  		case ZEND_AST_ZNODE:
  			*result = *zend_ast_get_znode(ast);
  			return NULL;
  		default:
  			if (type == BP_VAR_W || type == BP_VAR_RW || type == BP_VAR_UNSET) {
  				zend_error_noreturn(E_COMPILE_ERROR,
  					"Cannot use temporary expression in write context");
  			}
  
  			zend_compile_expr(result, ast);
  			return NULL;
  	}
  }
  /* }}} */
  
  zend_op *zend_delayed_compile_var(znode *result, zend_ast *ast, uint32_t type, zend_bool by_ref) /* {{{ */
  {
  	switch (ast->kind) {
  		case ZEND_AST_VAR:
  			return zend_compile_simple_var(result, ast, type, 1);
  		case ZEND_AST_DIM:
  			return zend_delayed_compile_dim(result, ast, type);
  		case ZEND_AST_PROP:
  		{
  			zend_op *opline = zend_delayed_compile_prop(result, ast, type);
  			if (by_ref) {
  				opline->extended_value |= ZEND_FETCH_REF;
  			}
  			return opline;
  		}
  		case ZEND_AST_STATIC_PROP:
  			return zend_compile_static_prop(result, ast, type, by_ref, 1);
  		default:
  			return zend_compile_var(result, ast, type, 0);
  	}
  }
  /* }}} */
  
  void zend_eval_const_expr(zend_ast **ast_ptr) /* {{{ */
  {
  	zend_ast *ast = *ast_ptr;
  	zval result;
  
  	if (!ast) {
  		return;
  	}
  
  	switch (ast->kind) {
  		case ZEND_AST_BINARY_OP:
  			zend_eval_const_expr(&ast->child[0]);
  			zend_eval_const_expr(&ast->child[1]);
  			if (ast->child[0]->kind != ZEND_AST_ZVAL || ast->child[1]->kind != ZEND_AST_ZVAL) {
  				return;
  			}
  
  			if (!zend_try_ct_eval_binary_op(&result, ast->attr,
  					zend_ast_get_zval(ast->child[0]), zend_ast_get_zval(ast->child[1]))
  			) {
  				return;
  			}
  			break;
  		case ZEND_AST_GREATER:
  		case ZEND_AST_GREATER_EQUAL:
  			zend_eval_const_expr(&ast->child[0]);
  			zend_eval_const_expr(&ast->child[1]);
  			if (ast->child[0]->kind != ZEND_AST_ZVAL || ast->child[1]->kind != ZEND_AST_ZVAL) {
  				return;
  			}
  
  			zend_ct_eval_greater(&result, ast->kind,
  				zend_ast_get_zval(ast->child[0]), zend_ast_get_zval(ast->child[1]));
  			break;
  		case ZEND_AST_AND:
  		case ZEND_AST_OR:
  		{
  			int i;
  			for (i = 0; i <= 1; i++) {
  				zend_eval_const_expr(&ast->child[i]);
  				if (ast->child[i]->kind == ZEND_AST_ZVAL) {
  					if (zend_is_true(zend_ast_get_zval(ast->child[i])) == (ast->kind == ZEND_AST_OR)) {
  						ZVAL_BOOL(&result, ast->kind == ZEND_AST_OR);
  						return;
  					}
  				}
  			}
  
  			if (ast->child[0]->kind != ZEND_AST_ZVAL || ast->child[1]->kind != ZEND_AST_ZVAL) {
  				return;
  			}
  
  			if (ast->kind == ZEND_AST_OR) {
  				ZVAL_BOOL(&result, zend_is_true(zend_ast_get_zval(ast->child[0])) || zend_is_true(zend_ast_get_zval(ast->child[1])));
  			} else {
  				ZVAL_BOOL(&result, zend_is_true(zend_ast_get_zval(ast->child[0])) && zend_is_true(zend_ast_get_zval(ast->child[1])));
  			}
  			break;
  		}
  		case ZEND_AST_UNARY_OP:
  			zend_eval_const_expr(&ast->child[0]);
  			if (ast->child[0]->kind != ZEND_AST_ZVAL) {
  				return;
  			}
  
  			zend_ct_eval_unary_op(&result, ast->attr, zend_ast_get_zval(ast->child[0]));
  			break;
  		case ZEND_AST_UNARY_PLUS:
  		case ZEND_AST_UNARY_MINUS:
  			zend_eval_const_expr(&ast->child[0]);
  			if (ast->child[0]->kind != ZEND_AST_ZVAL) {
  				return;
  			}
  
  			if (!zend_try_ct_eval_unary_pm(&result, ast->kind, zend_ast_get_zval(ast->child[0]))) {
  				return;
  			}
  			break;
  		case ZEND_AST_COALESCE:
  			/* Set isset fetch indicator here, opcache disallows runtime altering of the AST */
  			if (ast->child[0]->kind == ZEND_AST_DIM) {
  				ast->child[0]->attr = ZEND_DIM_IS;
  			}
  			zend_eval_const_expr(&ast->child[0]);
  
  			if (ast->child[0]->kind != ZEND_AST_ZVAL) {
  				/* ensure everything was compile-time evaluated at least once */
  				zend_eval_const_expr(&ast->child[1]);
  				return;
  			}
  
  			if (Z_TYPE_P(zend_ast_get_zval(ast->child[0])) == IS_NULL) {
  				zend_eval_const_expr(&ast->child[1]);
  				*ast_ptr = ast->child[1];
  				ast->child[1] = NULL;
  				zend_ast_destroy(ast);
  			} else {
  				*ast_ptr = ast->child[0];
  				ast->child[0] = NULL;
  				zend_ast_destroy(ast);
  			}
  			return;
  		case ZEND_AST_CONDITIONAL:
  		{
  			zend_ast **child, *child_ast;
  			zend_eval_const_expr(&ast->child[0]);
  			if (ast->child[0]->kind != ZEND_AST_ZVAL) {
  				/* ensure everything was compile-time evaluated at least once */
  				if (ast->child[1]) {
  					zend_eval_const_expr(&ast->child[1]);
  				}
  				zend_eval_const_expr(&ast->child[2]);
  				return;
  			}
  
  			child = &ast->child[2 - zend_is_true(zend_ast_get_zval(ast->child[0]))];
  			if (*child == NULL) {
  				child--;
  			}
  			child_ast = *child;
  			*child = NULL;
  			zend_ast_destroy(ast);
  			*ast_ptr = child_ast;
  			zend_eval_const_expr(ast_ptr);
  			return;
  		}
  		case ZEND_AST_DIM:
  		{
  			/* constant expression should be always read context ... */
  			zval *container, *dim;
  
  			if (ast->child[1] == NULL) {
  				zend_error_noreturn(E_COMPILE_ERROR, "Cannot use [] for reading");
  			}
  
  			/* Set isset fetch indicator here, opcache disallows runtime altering of the AST */
  			if (ast->attr == ZEND_DIM_IS && ast->child[0]->kind == ZEND_AST_DIM) {
  				ast->child[0]->attr = ZEND_DIM_IS;
  			}
  
  			zend_eval_const_expr(&ast->child[0]);
  			zend_eval_const_expr(&ast->child[1]);
  			if (ast->child[0]->kind != ZEND_AST_ZVAL || ast->child[1]->kind != ZEND_AST_ZVAL) {
  				return;
  			}
  
  			container = zend_ast_get_zval(ast->child[0]);
  			dim = zend_ast_get_zval(ast->child[1]);
  
  			if (Z_TYPE_P(container) == IS_ARRAY) {
  				zval *el;
  				if (Z_TYPE_P(dim) == IS_LONG) {
  					el = zend_hash_index_find(Z_ARR_P(container), Z_LVAL_P(dim));
  					if (el) {
  						ZVAL_COPY(&result, el);
  					} else {
  						return;
  					}
  				} else if (Z_TYPE_P(dim) == IS_STRING) {
  					el = zend_symtable_find(Z_ARR_P(container), Z_STR_P(dim));
  					if (el) {
  						ZVAL_COPY(&result, el);
  					} else {
  						return;
  					}
  				} else {
  					return; /* warning... handle at runtime */
  				}
  			} else if (Z_TYPE_P(container) == IS_STRING) {
  				zend_long offset;
  				zend_uchar c;
  				if (Z_TYPE_P(dim) == IS_LONG) {
  					offset = Z_LVAL_P(dim);
  				} else if (Z_TYPE_P(dim) != IS_STRING || is_numeric_string(Z_STRVAL_P(dim), Z_STRLEN_P(dim), &offset, NULL, 1) != IS_LONG) {
  					return;
  				}
  				if (offset < 0 || (size_t)offset >= Z_STRLEN_P(container)) {
  					return;
  				}
  				c = (zend_uchar) Z_STRVAL_P(container)[offset];
  				ZVAL_INTERNED_STR(&result, ZSTR_CHAR(c));
  			} else if (Z_TYPE_P(container) <= IS_FALSE) {
  				ZVAL_NULL(&result);
  			} else {
  				return;
  			}
  			break;
  		}
  		case ZEND_AST_ARRAY:
  			if (!zend_try_ct_eval_array(&result, ast)) {
  				return;
  			}
  			break;
  		case ZEND_AST_MAGIC_CONST:
  			if (!zend_try_ct_eval_magic_const(&result, ast)) {
  				return;
  			}
  			break;
  		case ZEND_AST_CONST:
  		{
  			zend_ast *name_ast = ast->child[0];
  			zend_bool is_fully_qualified;
  			zend_string *resolved_name = zend_resolve_const_name(
  				zend_ast_get_str(name_ast), name_ast->attr, &is_fully_qualified);
  
  			if (!zend_try_ct_eval_const(&result, resolved_name, is_fully_qualified)) {
  				zend_string_release_ex(resolved_name, 0);
  				return;
  			}
  
  			zend_string_release_ex(resolved_name, 0);
  			break;
  		}
  		case ZEND_AST_CLASS_CONST:
  		{
  			zend_ast *class_ast;
  			zend_ast *name_ast;
  			zend_string *resolved_name;
  
  			zend_eval_const_expr(&ast->child[0]);
  			zend_eval_const_expr(&ast->child[1]);
  
  			class_ast = ast->child[0];
  			name_ast = ast->child[1];
  
  			if (class_ast->kind != ZEND_AST_ZVAL || name_ast->kind != ZEND_AST_ZVAL) {
  				return;
  			}
  
  			resolved_name = zend_resolve_class_name_ast(class_ast);
  
  			if (!zend_try_ct_eval_class_const(&result, resolved_name, zend_ast_get_str(name_ast))) {
  				zend_string_release_ex(resolved_name, 0);
  				return;
  			}
  
  			zend_string_release_ex(resolved_name, 0);
  			break;
  		}
  		case ZEND_AST_CLASS_NAME:
  		{
  			zend_ast *class_ast = ast->child[0];
  			if (!zend_try_compile_const_expr_resolve_class_name(&result, class_ast)) {
  				return;
  			}
  			break;
  		}
  		default:
  			return;
  	}
  
  	zend_ast_destroy(ast);
  	*ast_ptr = zend_ast_create_zval(&result);
  }
  /* }}} */
  