33 0 0 0 OA Detecting Arithmetic Optimization Opportunities for C Compilers by Randomly Generated Equivalent Programs
- 著者
- Atsushi Hashimoto Nagisa Ishiura
- 出版者
- 一般社団法人 情報処理学会
- 雑誌
- IPSJ Transactions on System LSI Design Methodology (ISSN:18826687)
- 巻号頁・発行日
- vol.9, pp.21-29, 2016 (Released:2016-02-12)
- 参考文献数
- 17
- 被引用文献数
- 10
This paper presents new methods of detecting missed arithmetic optimization opportunities for C compilers by random testing. For each iteration of random testing, two equivalent programs are generated, where the arithmetic expressions in the second program are more optimized in the C program level. By comparing the two assembly codes compiled from the two C programs, lack of optimization on either of the programs is detected. This method is further extended for detecting erroneous or insufficient optimization involving volatile variables. Two random programs differing only on the initial values for volatile variables are generated, and the resulting assembly codes are compared. Random test systems implemented based on the proposed methods have detected missed optimization opportunities on several compilers, including the latest development versions of GCC-5.0.0 and LLVM/Clang-3.6.
1 0 0 0 OA Advantage and Possibility of Application-domain Specific Instruction-set Processor (ASIP)
- 著者
- Masaharu Imai Yoshinori Takeuchi Keishi Sakanushi Nagisa Ishiura
- 出版者
- Information Processing Society of Japan
- 雑誌
- IPSJ Transactions on System and LSI Design Methodology (ISSN:18826687)
- 巻号頁・発行日
- vol.3, pp.161-178, 2010 (Released:2010-08-16)
- 参考文献数
- 43
- 被引用文献数
- 3 6
This paper introduces the concept and technology of Application-domain Specific Instruction-set Processor (ASIP). First, VLSI design trend over the decades is overviewed and processors are shown to be expected one of the main components in the System Level Design. Then, the advantage of ASIP over General Purpose Processor (GPP) and Application Specific Integrated Circuit (ASIC) is illustrated. Next, processor hardware description synthesis technology, application program development tool set generation technology, and processor architecture optimization technology are outlined. Then, as an ASIP development environment example, ASIP Meister is explained. Next, an application of ASIP to medical and healthcare is introduced. Finally, the possibility of ASIP as an important component of Multi Processor SoC (MPSoC) is discussed.