Patents by Inventor Victoria I. Markstein

Victoria I. Markstein has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4642765
    Abstract: A method operable within an optimizing compiler to move certain range check instructions out of single entry strongly connected regions or loops and into linear regions of the instruction stream whereby computational efficiency is increased with no loss of program accuracy. The method comprises placing a range check trap instruction into the header node of the SCR provided there is only one conditional exit from the SCR, modifying the conditional exit test based on the value of the induction variable v, and inserting a new check at the loop exit point(s) to insure that the induction variable has reached the value it would have obtained in the original (unmodified) program.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: February 10, 1987
    Assignee: International Business Machines Corporation
    Inventors: John Cocke, Peter W. Markstein, Victoria I. Markstein