// SPDX-License-Identifier: MIT
pragma solidity ^0.8;
/* runner.json
{
"differential": true,
"actions": [
{
"Instantiate": {
"code": {
"Solidity": {
"contract": "MCopyOverlap"
}
}
}
},
{
"Call": {
"dest": {
"Instantiated": 0
},
"data": "afdce848"
}
}
]
}
*/
function copy(
uint dstOffset,
uint srcOffset,
uint length
) pure returns (bytes memory out) {
out = hex"2222222222222222333333333333333344444444444444445555555555555555"
hex"6666666666666666777777777777777788888888888888889999999999999999"
hex"aaaaaaaaaaaaaaaabbbbbbbbbbbbbbbbccccccccccccccccdddddddddddddddd";
assembly {
mcopy(
add(add(out, 0x20), dstOffset),
add(add(out, 0x20), srcOffset),
length
)
}
}
contract MCopyOverlap {
function mcopy_to_right_overlap() public pure returns (bytes memory) {
return copy(0x20, 0x10, 0x30);
}
}