Revert "Auto merge of #127537 - veluca93:struct_tf, r=BoxyUwU" This reverts https://github.com/rust-lang/rust/pull/127537 (commitacb4e8b625), reversing changes made to100fde5246. Opening to see if this can help resolve the recent perf. results [instability](https://rust-lang.zulipchat.com/#narrow/stream/247081-t-compiler.2Fperformance/topic/Weird.20perf.20results).
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