diff options
| -rw-r--r-- | libevmasm/ExpressionClasses.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libevmasm/ExpressionClasses.cpp b/libevmasm/ExpressionClasses.cpp index e32b2da2..cb327252 100644 --- a/libevmasm/ExpressionClasses.cpp +++ b/libevmasm/ExpressionClasses.cpp @@ -245,17 +245,18 @@ Rules::Rules() // invariants involving known constants {{Instruction::ADD, {X, 0}}, [=]{ return X; }}, + {{Instruction::SUB, {X, 0}}, [=]{ return X; }}, {{Instruction::MUL, {X, 1}}, [=]{ return X; }}, {{Instruction::DIV, {X, 1}}, [=]{ return X; }}, {{Instruction::SDIV, {X, 1}}, [=]{ return X; }}, {{Instruction::OR, {X, 0}}, [=]{ return X; }}, {{Instruction::XOR, {X, 0}}, [=]{ return X; }}, {{Instruction::AND, {X, ~u256(0)}}, [=]{ return X; }}, + {{Instruction::AND, {X, 0}}, [=]{ return u256(0); }}, {{Instruction::MUL, {X, 0}}, [=]{ return u256(0); }}, {{Instruction::DIV, {X, 0}}, [=]{ return u256(0); }}, {{Instruction::MOD, {X, 0}}, [=]{ return u256(0); }}, {{Instruction::MOD, {0, X}}, [=]{ return u256(0); }}, - {{Instruction::AND, {X, 0}}, [=]{ return u256(0); }}, {{Instruction::OR, {X, ~u256(0)}}, [=]{ return ~u256(0); }}, {{Instruction::EQ, {X, 0}}, [=]() -> Pattern { return {Instruction::ISZERO, {X}}; } }, // operations involving an expression and itself |