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