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Abstract Value Analysis#1759

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Commits on Jul 24, 2024

• create initial Size evaluator for modifiable lists

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Commits on Jul 29, 2024

• move all collection dependant logic into collection class

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Commits on Jul 31, 2024

• add support for static arrays

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• implement narrowing and widening operations

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Commits on Aug 5, 2024

• add narrowing and widening to loop analysis

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• handle branches in analysis

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Commits on Aug 8, 2024

• improve loops by preprocessing, better narrowing and valid starting ranges

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• improve subtraction by handling 0 as lowest possible value

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• mark branching nodes as nodes with an effect

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• correctly identify nodes of deeper branch layers in a loop

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Commits on Aug 12, 2024

• add documentation

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• temporarily repurpose cpg-neo4j for debugging

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Commits on Aug 19, 2024

• rework lattice intervals to support negative values

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• rename target package to circumvent gitignore

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• implement comparable for the LatticeInterval

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Commits on Aug 21, 2024

• implement the IntervalState

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Commits on Aug 26, 2024

• update the evaluator name in tests

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• implement equals check for intervals

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• add method stub for condition evaluation

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Commits on Oct 3, 2024

• Merge branch 'main' into rh/abstract-value-analysis

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• Spotless

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Commits on Oct 16, 2024

• Squashed commit of the following:

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Commits on Oct 21, 2024

• fix LatticeInterval.push to join with the previous value as it is already propagated from predecessors

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• Fix Declaration to only effect matching integers

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• correctly propagate widening only within loops

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Commits on Oct 23, 2024

• added second evaluate call with more defined arguments

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• support functions with side effects by creating a function-local evaluator

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• Merge branch 'main' into rh/abstract-value-analysis

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• moved side effect analysis to list instead of integer...

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Commits on Oct 28, 2024

• add new 'assignMinus' expression and add the name as code when creating a reference

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• cleanup

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• add tests for the new Evaluator

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• first implementation for other integer operations

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• add prefix versions of the inc and dec operator

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• Add test case for all implemented Integer operations

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• add auto-generated hashcode function

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• cleanup and documentation

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• remove old code

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• import cleanup

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• Merge branch 'main' into rh/abstract-value-analysis

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Commits on Oct 30, 2024

• automatically switch interval bounds if the lower bound is greater than the upper bound

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• remove min and max comparisons after multiplication as the constructor now handles the order

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• convert Bounded from data class to real class to remove constructor variables

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• fix division to estimate x / ∞ = 0

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• simplify division cases

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• Fix invalid division cases

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• make modulo calculation more concise

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• beautify toString representation

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• add first LatticeInterval tests

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• fix meet of intervals when they do not overlap

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Commits on Nov 4, 2024

• add equals operator for the Interval wrapper

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• add tests for meet, widen, narrow and the wrapper

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• fix meet test method

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• change default of plusAssign and minusAssign to lose all information

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• add tests for the Integer Value

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• check name of array declaration

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• move code block for function side effects further up

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• add tests for array and mutable list

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• remove unfinished code block in MutableList

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• made spotless

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Commits on Nov 18, 2024

• changed the name of the Value classes to prevent confusion with builtin classes

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