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    题名: Register allocation via dynamically updated information
    作者: 賴飛羆;Lai, Feipei;葉家誠;Yeh, Chia-cheng;李鴻璋;Lee, Hung-chang
    贡献者: 淡江大學資訊管理學系
    关键词: interference;graph-coloring;register allocation;spot;estimation function
    日期: 1992-09-01
    上传时间: 2009-11-30 13:13:10 (UTC+8)
    出版者: 中央研究院資訊科學研究所
    摘要: Register allocation is a necessary component of most compilers, especially those for RISC machines. The former graph-coloring technique [1,2] has been recognized as an effective method. However, techniques based on graph-coloring suffer from the long live range problem and that of manipulating the large interference graph [3,4]. In this paper, a different register allocation algorithm using dynamically updated information is introduced. With this method, the live range of a variable is viewed as a collection of spots, which are the coordinate distances where the variable is used. Together with the usage counts of a variable and the increased weight on a variable in the loop structure, we estimate the cost of each variable already in the register. In case a spill is not avoidable, the variable in the register with minimum cost is chosen. Primary results show that this method diminishes the number of load/stores by about 21%, when compared with Chow's [5] graph-coloring method.
    關聯: Journal of information science and engineering 8(3), pp.393-413
    显示于类别:[資訊管理學系暨研究所] 期刊論文

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