Digital computer register allocation and code spilling using interference graph coloring

dc.contributor.assigneeRice Universityen_US
dc.contributor.publisherUnited States Patent and Trademark Officeen_US
dc.creatorBriggs, Preston P.en_US
dc.creatorCooper, Keith D.en_US
dc.creatorKennedy, Kenneth W. Jr.en_US
dc.creatorTorczon, Linda M.en_US
dc.date.accessioned2015-05-04T19:05:28Zen_US
dc.date.available2015-05-04T19:05:28Zen_US
dc.date.filed1993-03-08en_US
dc.date.issued1993-09-28en_US
dc.description.abstractA method is disclosed for allocating internal machine registers in a digital computer for use in storing values defined and referenced by a computer program. An allocator in accordance with the present invention constructs a interference graph having a node therein for the live range of each value defined by a computer program, and having an edge between every two nodes whose associated live ranges interfere with each other. The allocator models the register allocation process as a graph-coloring problem, such that for a computer having R registers, the allocator of the present invention iteratively attempts to R-color the interference graph. The interference graph is colored to the extent possible on each iteration before a determination is made that one or more live ranges must be spilled. After spill code has been added to the program to transform spilled live ranges into multiple smaller live ranges, the allocator constructs a new interference graph and the process is repeated.en_US
dc.digitization.specificationsThis patent information was downloaded from the US Patent and Trademark website (http://www.uspto.gov/) as image-PDFs. The PDFs were OCRed for access purposes.en_US
dc.format.extent16 ppen_US
dc.identifier.citationBriggs, Preston P., Cooper, Keith D., Kennedy, Kenneth W. Jr. and Torczon, Linda M., "Digital computer register allocation and code spilling using interference graph coloring." Patent US5249295A. issued 1993-09-28. Retrieved from <a href="https://hdl.handle.net/1911/79821">https://hdl.handle.net/1911/79821</a>.en_US
dc.identifier.patentIDUS5249295Aen_US
dc.identifier.urihttps://hdl.handle.net/1911/79821en_US
dc.language.isoengen_US
dc.titleDigital computer register allocation and code spilling using interference graph coloringen_US
dc.typeUtility patenten_US
dc.type.dcmiTexten_US
dc.type.genrepatentsen_US
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