mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
41 lines
1.3 KiB
Plaintext
41 lines
1.3 KiB
Plaintext
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{
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let _1 := 0
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let value := calldataload(4)
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if iszero(eq(value, and(value, sub(shl(160, 1), 1)))) { revert(_1, _1) }
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let length := extcodesize(value)
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let _2 := 0xffffffffffffffff
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if gt(length, _2) { revert(0, 0) }
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let _3 := not(31)
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let memPtr := mload(64)
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let newFreePtr := add(memPtr, and(add(and(add(length, 31), _3), 63), _3))
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if or(gt(newFreePtr, _2), lt(newFreePtr, memPtr)) { revert(0, 0) }
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mstore(64, newFreePtr)
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mstore(memPtr, length)
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// We aim to optimize this out.
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extcodecopy(value, add(memPtr, 32), _1, length)
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sstore(_1, mload(memPtr))
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}
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// ====
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// EVMVersion: >byzantium
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// ----
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// step: fullSuite
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//
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// {
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// {
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// let value := calldataload(4)
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// if iszero(eq(value, and(value, sub(shl(160, 1), 1)))) { revert(0, 0) }
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// let length := extcodesize(value)
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// let _1 := 0xffffffffffffffff
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// if gt(length, _1) { revert(0, 0) }
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// let memPtr := mload(64)
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// let _2 := not(31)
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// let newFreePtr := add(memPtr, and(add(and(add(length, 31), _2), 63), _2))
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// if or(gt(newFreePtr, _1), lt(newFreePtr, memPtr)) { revert(0, 0) }
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// mstore(64, newFreePtr)
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// mstore(memPtr, length)
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// extcodecopy(value, add(memPtr, 32), 0, length)
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// sstore(0, mload(memPtr))
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// }
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// }
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