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Checks for overflow/underflow after add/sub operations.

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This commit is contained in:
Matheus Aguiar
2022-06-23 14:41:12 -03:00
parent 3ed9a38abc
commit 4fd5c11af7
49 changed files with 450 additions and 434 deletions
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test/cmdlineTests/optimizer_array_sload/output
+4 -3
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@@ -49,16 +49,17 @@ object "Arraysum_34" {
{
/// @src 0:80:429 "contract Arraysum {..."
mstore(_2, _2)
let _4 := sload(add(18569430475105882587588266137607568536673111973893317399460219858819262702947, var_i))
if gt(var_sum, not(_4))
let sum := add(var_sum, sload(add(18569430475105882587588266137607568536673111973893317399460219858819262702947, var_i)))
if gt(var_sum, sum)
{
mstore(_2, shl(224, 0x4e487b71))
mstore(_1, 0x11)
revert(_2, 0x24)
}
/// @src 0:407:423 "sum += values[i]"
var_sum := /** @src 0:80:429 "contract Arraysum {..." */ add(var_sum, _4)
var_sum := sum
}
/// @src 0:80:429 "contract Arraysum {..."
let memPos := mload(64)
mstore(memPos, var_sum)
return(memPos, 32)