Induction variable identification
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United States of America Patent
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Jan 23, 2018
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N/A
app pub date -
Aug 17, 2016
filing date -
Aug 17, 2015
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Abstract
Aspects of the disclosure provide a method for identifying an induction variable in a loop during a compiling process. The method includes searching for a phi-function that includes a first operand and a second operand and defines a candidate basic induction variable (BIV), searching for an add/sub instruction that has a first register and a second register wherein the first register is the second operand of the phi-function, or the value in the first register is subsequently stored to the second operand of the phi-function through one or more move instructions, and determining the candidate BIV is a BIV when the second register of the add/sub instruction is the candidate BIV or stores a value that is passed from the candidate BIV through one or more move instructions.
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