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https://github.com/ethereum/solidity
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26 lines
372 B
Python
26 lines
372 B
Python
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from opcodes import AND, SHL
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from rule import Rule
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from z3 import BitVec
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"""
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Rule:
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AND(SHL(Z,X), SHL(Z,Y)) -> SHL(Z, AND(X,Y))
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"""
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rule = Rule()
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n_bits = 128
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# Input vars
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X = BitVec('X', n_bits)
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Y = BitVec('Y', n_bits)
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Z = BitVec('Z', n_bits)
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# Non optimized result
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nonopt = AND(SHL(Z,X), SHL(Z,Y))
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# Optimized result
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opt = SHL(Z, AND(X,Y))
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rule.check(nonopt, opt)
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