Control flow graph analysis
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United States of America Patent
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Mar 20, 2018
Issued Date -
N/A
app pub date -
Aug 24, 2015
filing date -
Aug 24, 2015
priority date (Note) -
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Abstract
A method and systems generate a control flow graph including an edge of the control flow graph from a branch instruction to a target address of the branch instruction in an abstract interpretation for an assignment instruction to a branch target variable of a program. The program allocates a particular branch target variable to a branch instruction having a plurality of branch targets. The branch target address is loaded from the branch target variable upon branching, a branch address of a branch instruction having one branch target as well as the address assigned by the assignment instruction to the branch target variable being determined as certain constant values determined by compiling the program. The target address assigned by the assignment instruction is added to an object of the abstract interpretation. A current abstract interpretation is terminated if the abstract interpretation reaches an instruction already subjected to the abstract interpretation.
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