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e61403aa4c
rust/compiler/rustc_middle
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bors e61403aa4c Auto merge of #138634 - saethlin:repeated-uninit, r=scottmcm,oli-obk 
Lower to a memset(undef) when Rvalue::Repeat repeats uninit

Fixes https://github.com/rust-lang/rust/issues/138625.

It is technically correct to just do nothing. But if we actually do nothing, we may miss that this is de-initializing something, so instead we just lower to a single memset that writes undef. This is still superior to the memcpy loop, in both quality of code we hand to the backend and LLVM's final output.
2025-03-25 02:09:15 +00:00
..
src Auto merge of #138634 - saethlin:repeated-uninit, r=scottmcm,oli-obk 2025-03-25 02:09:15 +00:00
Cargo.toml Revert "Use workspace lints for crates in compiler/ #138084" 2025-03-10 18:12:47 +08:00
messages.ftl clean up layout error diagnostics 2025-02-18 13:22:45 +01:00
README.md

README.md

For more information about how rustc works, see the rustc dev guide.