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| author | chriseth <chris@ethereum.org> | 2016-10-24 21:50:31 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2016-10-24 21:50:31 +0800 |
| commit | 9e0594f4c1bf34a48771c7d67e6c76e1197425ae (patch) | |
| tree | ff3e0bf1ba9ffae0335b0856fc16e8536899f0c7 | |
| parent | 2f1310124308cba97e5b14c3f4a089a435320582 (diff) | |
| parent | 6686ea6c03d80f11ef55352b917ef13a06dfd244 (diff) | |
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Merge pull request #1270 from ethereum/optimise-eq0
Optimise the PUSH 0, EQ case as ISZERO
| -rw-r--r-- | libevmasm/ExpressionClasses.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/libevmasm/ExpressionClasses.cpp b/libevmasm/ExpressionClasses.cpp index 9d13a57a..cf5e6a0e 100644 --- a/libevmasm/ExpressionClasses.cpp +++ b/libevmasm/ExpressionClasses.cpp @@ -257,6 +257,7 @@ Rules::Rules() {{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 {{Instruction::AND, {X, X}}, [=]{ return X; }}, {{Instruction::OR, {X, X}}, [=]{ return X; }}, |