From: Anatol Belski <ab@php.net>
Date: Mon, 15 Sep 2014 09:59:48 +0000 (+0200)
Subject: fix unsigned negation
X-Git-Tag: PRE_NATIVE_TLS_MERGE~158^2~85^2~26
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=4e09d782efae9c22a81b9c46f0243c0d1e13771d;p=php

fix unsigned negation
---

diff --git a/Zend/zend_ast.c b/Zend/zend_ast.c
index 8c9607fcff..9604079a9e 100644
--- a/Zend/zend_ast.c
+++ b/Zend/zend_ast.c
@@ -163,7 +163,7 @@ ZEND_API zend_ast *zend_ast_create_list(uint32_t init_children, zend_ast_kind ki
 }
 
 static inline zend_bool is_power_of_two(uint32_t n) {
-	return n == (n & -n);
+	return ((n != 0) && (n == (n & (~n + 1))));
 }
 
 ZEND_API zend_ast *zend_ast_list_add(zend_ast *ast, zend_ast *op) {