| 摘要 |
PURPOSE:To reduce load/store processing in an undesired form, by detecting the existence of a reference arrangement element successively and holding contents of a register, by which the arrangement element is defined, up to the next cycle when a used register is determined. CONSTITUTION:A compiler 18 takes in a source program 17 from a mass storage device and interprets sentences in a source interpreting part 20 to develop them to an intermediate code. A storage allocating part 21 allocates addresses in a storage area to various data appearing in the program, and a vector converting part 22 detects loop structures in the program to recognize parallel executable parts and changes the intermediate code. An intermediate code optimizing part 23 performs the optimization for using effectively a processor in the level of the intermediate code, and a register use determining part 24 assigns resources to data appearing in the intermediate code, and an objective program 19 is outputted from an objective program output part 25. When used registers are determined in the determining part 24, the existence of reference arrangement elements is detected successively, and contents of registers by which arrangement elements are defined are held up to the next cycle, and values of arrangement elements are propagated in the next cycle. |
