优化设置VisualBasic6．0编译器的选项

在分析VisualBasic6．0(以下简称VB6．0)应用程序优化的重要性基础上,提出优化VB6．0编译器自身选项设置的方法,并详细地剖析了VB6．0编译器各种选项设置对应用程序的优化作用。实例证明：通过合理设置VB6．0编译器的选项能使应用程序达到较为满意的优化效果。     

Syntax and semantics of universal programming languages

This paper deals with certain characterizations of the sets of positive integers which when represented as strings on a finite alphabet, form tree adjunct languages, As the context free languages constitute a subfamily of tree adjunct languages, the results carry over to the former as well.     

A self‐applicable online partial evaluator for recursive flowchart languages

This paper describes a self‐applicable online partial evaluator for a flowchart language with recursive calls. Self‐application of the partial evaluator yields generating extensions that are as efficient as those reported in the literature for offline partial evaluation. This result is remarkable because it has been assumed that online partial evaluation techniques unavoidably lead to inefficient and overgeneralized generating extensions. The purpose of this paper is not to determine which kind of partial evaluation is better, but to show how the problem can be solved by recursive polyvariant specialization. The design of the self‐applicable online partial evaluator is based on a number of known techniques, but by combining them in a new way this result can be produced. The partial evaluator, its techniques, and its implementation are presented in full. Self‐application according to all three Futamura projections is demonstrated. The complete bootstrap of a compiler generator from a partial evaluator is also reported. Copyright © 2011 John Wiley & Sons, Ltd.     

A register window scheduling method for prolog

Abstract

This paper describes a windowed register file management technique for Prolog that we call “SORWT'’ (Splittable Overlapped Register Window Technique). This scheme is implemented in our Prolog system. Two pointers, the CWP (Current Window Pointer) and TWP (Top Window Pointer), are used with the register file so that the environment, choice point and arguments can be stored in register windows. This greatly reduces the number of memory accesses and procedure call/return overhead. This paper describes in detail how Warren instructions can be implemented in a windowed register file system. A mapping function between register windows and memory window areas and register file overflow/underflow handling algorithms are also presented. In addition, to cope with argument overflow problems in a window, the concept of extended windows is proposed.

Thirty benchmark programs are used to study the following effects: performance issue of SORW versus conventional stacked register windows; optimal register file and window sizes; argument overflow rate; and the efficiency of extended windows.     

基于GCC的TMS320C67xx汇编代码的优化

为了使生成的汇编代码具有更高的执行效率,设计并实现了一种基于GCC的 TMS320C67xx汇编指令级的代码优化算法。首先,将汇编指令按照功能划分为不同的指令类型,并将汇编指令链接到链表中。然后,针对每一个寄存器建立对该寄存器的读写操作指令链表。最后,通过对指令类型的判断和对寄存器读写操作指令链表的分析,完成了冗余代码的删除和指令合并。实验结果表明,经过代码优化后,TMS320C67xx汇编代码的执行效率提高了20％左右,较中间代码级的优化算法执行效率提高了15％左右。     

运动控制器控制语言及编译系统研究

介绍了一种文字型高级运动控制语言-EP（easy program）语言及其编译系统。这种语言采用类似C语言的结构形式，包括了PLC和运动控制器指令，实现了两种指令的统一编程。其编程系统由上位机编译器和下位机解释器两部分组成，使EP语言具有很强的可移植性和通用性，实现也比较简便。     

智能神经网络程序设计语言的研究与实现

将神经网络与逻辑推理统一到面向对象理论中,建立了同时具备神经网络和专家系统特性、融合连接机制和符号机制的智能神经元模型。提出了一种新的程序设计语言——智能神经网络程序语言(NIPL),实现了神经计算、逻辑推理和数值计算的统一。定义了NIPL的语法,设计并实现了智能神经网络程序设计语言NIPL编译器,从而为开发智能神经网络应用系统提供了有效的手段。     

Understanding the behavior of compiler optimizations

Compiler optimizations are difficult to implement and add complexity to a compiler. For this reason, compiler writers are selective about implementing them: they implement only the ones that they believe will be beneficial. To support compiler writers in this, we describe a method for measuring the cost and benefits of compiler optimizations, both individually and in synergy with other optimizations. We demonstrate our method by presenting results for the optimizations implemented in the Jikes Research Virtual Machine on the PowerPC and IA32 platforms. Copyright © 2006 John Wiley & Sons, Ltd.     

《编译原理》课程教学初探

对编译原理课程的教学做了一些探讨,详细阐述了词法分析和语法分析主要技术,提出该门课程教学重点在于课堂教学和实验教学两大方面。     

并行化编译器中基于工作量的条件并行化研究

并行化编译器通过发掘串行程序中的并行性来提高程序的运行性能。但当可并行的工作量与并行的线程数目之比较小时，有可能采用并行执行反而会降低程序的整体性能。本文工作基于SUIF结构．研究精确的工作量计算方法，并实现了基于工作量的条件并行化技术．有效地提高了并行程序的执行性能。