当然,你仔细观察就会发现这段代码运行不了,因为第三行的z是一个未被定义的变量,这里我们引出reaching definition analysis的一个应用:检测possible undefined variables。 具体操作是,静态分析器拿到这段代码后,在第一行之前,会给每一个被使用的变量,加一个dummy definition,即: // dummy definition added by analyzer...
Reaching Definition Analysis 一.到达-定值(Reaching Definitions): 1.一个定值是对某个变量的赋值。( Adefinitionof a variablexis a statement that assigns, or may assign, a value tox) 2.一个变量的某个特定定值到达过程的一个给定点:如果存在从这个定值到达那一点的一条执行路径,使得这个变量在那一点可能...
(ReachingDefinitionsAnalysis) 3.1 简述 先说明什么是"可达的定义":在程序点ppp的一个定义ddd,到程序点qqq是可达的,当且仅当这个定义在...definition。 也就是说变量vvv在ppp处有definition,然后在p→qp \to qp→q不能被新的definition盖掉,这样它(指 ppp处vvv的 ...
reaching definition analysisreaching definition analysis 到达定义分析 英/ˈriːtʃɪŋ ˌdefɪˈnɪʃn əˈnæləsɪs/ 美/ˈriːtʃɪŋ ˌdefɪˈnɪʃn əˈnæləsɪs/©2022 Baidu |由 百度智能云 提供计算服务 | 使用百度前必读 | 文库...
网络定义可达性分析 网络释义 1. 定义可达性分析 的数值在第三行被使用,一个程式通常会进行定义可达性分析(reaching definition analysis)来测定它。在SSA下,将会变成 … zh.wikipedia.org|基于34个网页
Reaching Definition Analysisdoi:10.1007/978-0-387-22461-9_5In Chapter 1 we give the intuition behind reaching definitions, and we give their formal definition in Chapter 2. In this chapter, we go into the details of this type of program analysis.Springer New York...
Applications of Reaching Definition Analysisdoi:10.1007/978-0-387-22461-9_6Reaching definitions provide a description of the successive definitions and uses of variables, but they do not say what the values of these variables are. However, data flow and value flow are......
A case example illustrates how the definition and framework can be used to organize and plan professional development. Future directions for how a shared definition could move the field closer to a shared vision for planning, implementing, and evaluating professional development are discussed. 展开 ...
or indeed those who are trying to reach them. There was an overarching sense that trying to engage the 'hard to reach' is problematic, as described almost two decades ago by Freimuth & Mettger [14](1990) and this may be due to the inherent ambiguity and lack...
Definition 2.2: A set M is said to be positively invariant with respect to (1) if, for any ' 2 M, there is a solution x(') of (1) that is defined on [ÀT , 1) such that xt(') 2 M for all t ! 0 and x0 ¼ '. Definition 2.3: Let ' 2 . An element of ...