CPCC抽象语法树的三地址码生成

为了便于代码优化及指令生成，在并行C语言编译器CPCC（Concordia Parallel C Compiler）将源程序的抽象语法树（Abstract Syntax Tree, AST）转换成目标机PAAG（Parallel Array Architecture GPU）处理器的汇编代码时，采用了三地址码作为中间表示形式。基于CPCC AST的结构特点，将AST到三地址码的转换分为三类，即一般表达式的翻译、布尔表达式的翻译以及语句的翻译，并给出了其详细设计思路及是实现方法。实验结果表明，该方案实现了从源码的抽象语法树到三地址码的转换。

Implementation of Three Address Code Based on CPCC AST

To facilitate code optimization and code generation, three address code is used as the intermediate representation in translating abstract syntax tree, which generated from source C program by parallel C compiler CPCC（Concordia Parallel C Compiler）, into assemble code of target machine PAAG（Parallel Array Architecture GPU）. According to structural characteristic of AST in CPCC, the translation from AST into three address code is categorized tree types：general expression translation, bool-ean expression translation and statement translation. A detailed design and realization method are given. Result of this experiment shows the method completing the translation from AST into Three Address Code.