solidity/test/libyul/yulOptimizerTests/fullSuite/loopInvariantCodeMotion.yul
2020-01-08 09:56:08 +01:00

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{
sstore(0, array_sum(calldataload(0)))
function array_sum(x) -> sum {
let length := calldataload(x)
for { let i := 0 } lt(i, length) { i := add(i, 1) } {
sum := add(sum, array_load(x, i))
}
}
function array_load(x, i) -> v {
let len := calldataload(x)
if iszero(lt(i, len)) { revert(0, 0) }
let data := add(x, 0x20)
v := calldataload(add(data, mul(i, 0x20)))
// this is just to have some additional code that
// can be moved out of the loop.
v := add(v, calldataload(7))
}
}
// ====
// step: fullSuite
// ----
// {
// {
// let _1 := calldataload(0)
// let sum := 0
// let length := calldataload(_1)
// let i := sum
// let _2 := calldataload(7)
// for { } lt(i, length) { i := add(i, 1) }
// {
// let _3 := 0x20
// sum := add(sum, add(calldataload(add(add(_1, mul(i, _3)), _3)), _2))
// }
// sstore(0, sum)
// }
// }