The ABI says so. ABIs typically designate that called functions can freely modify only certain registers. Called functions have to save and restore the others. This is a trade-off to try to reduce unnecessary saving and reloading of data which is no longer needed.
21 Feb 2026 Parse, don't Validate and Type-Driven Design in Rust
,这一点在币安 binance中也有详细论述
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Глава Генштаба рассказал о создании полосы безопасности в зоне СВО20:25