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Auto merge of #97485 - bjorn3:new_archive_writer, r=wesleywiser

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Rewrite LLVM's archive writer in Rust

This allows it to be used by other codegen backends.

Fixes https://github.com/bjorn3/rustc_codegen_cranelift/issues/1155
This commit is contained in:
bors 2022-12-03 15:07:39 +00:00
commit cab4fd678c
24 changed files with 491 additions and 527 deletions
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6
compiler/rustc_data_structures/src/memmap.rs
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@ -40,6 +40,12 @@ impl Deref for Mmap {
}
}
impl AsRef<[u8]> for Mmap {
fn as_ref(&self) -> &[u8] {
&*self.0
}
}
// SAFETY: On architectures other than WASM, mmap is used as backing storage. The address of this
// memory map is stable. On WASM, `Vec<u8>` is used as backing storage. The `Mmap` type doesn't
// export any function that can cause the `Vec` to be re-allocated. As such the address of the