Simplify known bits #335
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Simplify known bits #335
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morriisw
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Feb 21, 2025
morriisw
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- Added a 'SimplifyKnownBits.scala' file under 'src/main/scala/ir/transforms' that defines the known bits/TNum abstract domain
- Added a Z3 Python test script called 'tnum_test_z3.py' under the 'scripts' folder to verify the TNum simplification logic that appears in 'SimplifyKnownBits.scala'
- Made changes to 'simplification-solvers.md' under 'docs/development' to include an explanation of the known bits analysis
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…or efficiency and logic simplification. Logic for bitwise operations between TNums remains the same but join method under TNumDomain now only merges the TNum of variables that appear in more than one program state.
…into a separate method called evaluateExprToTNum to allow for recursive matching and evaluation. Create new method called evaluateBinOp that evaluates binary operations and can be called within evaluateExprToTNum method.
…tors. Add evaluateUnOp method under TNumDomain class to handle evaluation of unary operations.
… to merge TNum values of variables that appear in both maps.
…toTNum method under TNumDomain class.
…iate between bitvector and boolean types. Change bitwise comparison method TCOMP to return a bitvector equivalent TNumValue instead of a boolean.
…ranslation of literals.
…both TNumValue and TNumBool instances.
…lyTransform method to generate IL.
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