V2EX control dependence

Control Dependence

释义 Definition

控制依赖:在程序分析/编译器中指一种关系某条语句(或基本块)是否会被执行,取决于某个分支条件(如 if/elseswitch、循环条件)的结果。它常用于构建程序依赖图(PDG)、进行优化与安全分析。(在不同语境下也可能与“控制流依赖”相关联。)

发音 Pronunciation

/ kntrol dpndns /

例句 Examples

Control dependence helps the compiler understand which code runs after an if statement.
控制依赖帮助编译器理解在 if 语句之后哪些代码会被执行。

In a program dependence graph, statements inside a loop body are typically control-dependent on the loop’s condition, which affects slicing and optimization decisions.
在程序依赖图中,循环体内的语句通常对循环条件存在控制依赖,这会影响程序切片与优化决策。

词源 Etymology

该术语由 control(控制/控制流)dependence(依赖关系) 组合而来:强调“执行路径由控制条件决定”依赖关系。它在编译器理论中与数据流分析一同发展,用于更精确地刻画程序结构与影响范围。

相关词 Related Words

文献与作品 Literary Works

  • “The Program Dependence Graph and Its Use in Optimization”(Ferrante, Ottenstein, Warren, 1987)系统提出并使用控制依赖来构建 PDG。
  • Compilers: Principles, Techniques, and Tools(Aho, Lam, Sethi, Ullman,“龙书”)在编译器分析/优化相关章节中讨论依赖与控制流概念。
  • Engineering a Compiler(Cooper & Torczon)在中间表示、控制流与优化章节中涉及控制依赖/相关分析方法。
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