mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
34 lines
480 B
Python
34 lines
480 B
Python
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from rule import Rule
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from opcodes import *
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"""
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Rule:
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MUL(X, SHL(Y, 1)) -> SHL(Y, X)
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MUL(SHL(X, 1), Y) -> SHL(X, Y)
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Requirements:
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"""
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rule = Rule()
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n_bits = 64
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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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# Constants
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ONE = BitVecVal(1, n_bits)
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# Requirements
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# Non optimized result
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nonopt_1 = MUL(X, SHL(Y, ONE))
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nonopt_2 = MUL(SHL(X, ONE), Y)
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# Optimized result
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opt_1 = SHL(Y, X)
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opt_2 = SHL(X, Y)
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rule.check(nonopt_1, opt_1)
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rule.check(nonopt_2, opt_2)
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