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Fix optimization specific SREM edge case (#527)

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Existing test coverage didn't catch a signed remainder overflow
semantics edge case behavior where at least one the operators is being
constant folded by LLVM instead of solc. This PR fixes the SREM
translation bug and adds missing test coverage for division ops with
constants.

Closes #524

---------

Signed-off-by: xermicus <cyrill@parity.io>
This commit is contained in:
xermicus authored and GitHub committed 2026-05-28 09:01:41 +02:00
1 parent 62a62770e3
commit 40e97d11eb
23 files changed
+1336 -21
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crates/integration/src/cases.rs
+72
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@@ -186,6 +186,78 @@ case!("DivisionArithmetics.sol", DivisionArithmetics, sdivCall, division_arithme
case!("DivisionArithmetics.sol", DivisionArithmetics, modCall, division_arithmetics_mod, n: U256, d: U256);
case!("DivisionArithmetics.sol", DivisionArithmetics, smodCall, division_arithmetics_smod, n: I256, d: I256);
sol!(
contract DivConst {
function divRhsZero(uint256 n) external pure returns (uint256);
function divRhsOne(uint256 n) external pure returns (uint256);
function divRhsTwo(uint256 n) external pure returns (uint256);
function divRhsFive(uint256 n) external pure returns (uint256);
function divRhsMax(uint256 n) external pure returns (uint256);
function divLhsZero(uint256 d) external pure returns (uint256);
function divLhsOne(uint256 d) external pure returns (uint256);
function divLhsTwo(uint256 d) external pure returns (uint256);
function divLhsFive(uint256 d) external pure returns (uint256);
function divLhsMax(uint256 d) external pure returns (uint256);
}
contract SdivConst {
function sdivRhsZero(int256 n) external pure returns (int256);
function sdivRhsOne(int256 n) external pure returns (int256);
function sdivRhsNegOne(int256 n) external pure returns (int256);
function sdivRhsTwo(int256 n) external pure returns (int256);
function sdivRhsNegTwo(int256 n) external pure returns (int256);
function sdivRhsFive(int256 n) external pure returns (int256);
function sdivRhsNegFive(int256 n) external pure returns (int256);
function sdivRhsMin(int256 n) external pure returns (int256);
function sdivRhsMinPlusOne(int256 n) external pure returns (int256);
function sdivRhsMax(int256 n) external pure returns (int256);
function sdivLhsZero(int256 d) external pure returns (int256);
function sdivLhsOne(int256 d) external pure returns (int256);
function sdivLhsNegOne(int256 d) external pure returns (int256);
function sdivLhsTwo(int256 d) external pure returns (int256);
function sdivLhsNegTwo(int256 d) external pure returns (int256);
function sdivLhsFive(int256 d) external pure returns (int256);
function sdivLhsNegFive(int256 d) external pure returns (int256);
function sdivLhsMin(int256 d) external pure returns (int256);
function sdivLhsMinPlusOne(int256 d) external pure returns (int256);
function sdivLhsMax(int256 d) external pure returns (int256);
}
contract ModConst {
function modRhsZero(uint256 n) external pure returns (uint256);
function modRhsOne(uint256 n) external pure returns (uint256);
function modRhsTwo(uint256 n) external pure returns (uint256);
function modRhsFive(uint256 n) external pure returns (uint256);
function modRhsMax(uint256 n) external pure returns (uint256);
function modLhsZero(uint256 d) external pure returns (uint256);
function modLhsOne(uint256 d) external pure returns (uint256);
function modLhsTwo(uint256 d) external pure returns (uint256);
function modLhsFive(uint256 d) external pure returns (uint256);
function modLhsMax(uint256 d) external pure returns (uint256);
}
contract SmodConst {
function smodRhsZero(int256 n) external pure returns (int256);
function smodRhsOne(int256 n) external pure returns (int256);
function smodRhsNegOne(int256 n) external pure returns (int256);
function smodRhsTwo(int256 n) external pure returns (int256);
function smodRhsNegTwo(int256 n) external pure returns (int256);
function smodRhsFive(int256 n) external pure returns (int256);
function smodRhsNegFive(int256 n) external pure returns (int256);
function smodRhsMin(int256 n) external pure returns (int256);
function smodRhsMax(int256 n) external pure returns (int256);
function smodLhsZero(int256 d) external pure returns (int256);
function smodLhsOne(int256 d) external pure returns (int256);
function smodLhsNegOne(int256 d) external pure returns (int256);
function smodLhsTwo(int256 d) external pure returns (int256);
function smodLhsNegTwo(int256 d) external pure returns (int256);
function smodLhsFive(int256 d) external pure returns (int256);
function smodLhsNegFive(int256 d) external pure returns (int256);
function smodLhsMin(int256 d) external pure returns (int256);
function smodLhsMax(int256 d) external pure returns (int256);
}
);
sol!(
contract Send {
function transfer_self(uint _amount) public payable;