solidity/test/libsolidity/semanticTests/viaYul/cleanup/checked_arithmetic.sol
2020-05-05 13:38:31 +02:00

66 lines
1.4 KiB
Solidity

contract C {
function add() public pure returns (uint8, uint8) {
uint8 x; uint8 y = 0;
assembly { x := 0x0101 }
return (x + y, y + x);
}
function sub() public pure returns (uint8, uint8) {
uint8 x; uint8 y = 1;
assembly { x := 0x0101 }
return (x - y, y - x);
}
function mul() public pure returns (uint8, uint8) {
uint8 x; uint8 y = 1;
assembly { x := 0x0101 }
return (x * y, y * x);
}
function div() public pure returns (uint8, uint8) {
uint8 x; uint8 y = 1;
assembly { x := 0x0101 }
return (x / y, y / x);
}
function mod() public pure returns (uint8, uint8) {
uint8 x; uint8 y = 2;
assembly { x := 0x0101 }
return (x % y, y % x);
}
function inc_pre() public pure returns (uint8) {
uint8 x;
assembly { x := 0x0100 }
return ++x;
}
function inc_post() public pure returns (uint8) {
uint8 x;
assembly { x := 0x0100 }
return x++;
}
function dec_pre() public pure returns (uint8) {
uint8 x;
assembly { x := not(0xFF) }
return --x;
}
function dec_post() public pure returns (uint8) {
uint8 x;
assembly { x := not(0xFF) }
return x--;
}
function neg() public pure returns (int8) {
int8 x;
assembly { x := 0x80 }
return -x;
}
}
// ====
// compileViaYul: true
// ----
// add() -> 1, 1
// sub() -> 0, 0
// mul() -> 1, 1
// div() -> 1, 1
// mod() -> 1, 0
// inc_pre() -> 1
// inc_post() -> 0
// dec_pre() -> FAILURE
// dec_post() -> FAILURE
// neg() -> FAILURE