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rust/compiler/rustc_codegen_llvm
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Matthias Krüger fab38375bc
Rollup merge of #137095 - saethlin:use-hash64-for-hashes, r=workingjubilee 
Replace some u64 hashes with Hash64

I introduced the Hash64 and Hash128 types in https://github.com/rust-lang/rust/pull/110083, essentially as a mechanism to prevent hashes from landing in our leb128 encoding paths. If you just have a u64 or u128 field in a struct then derive Encodable/Decodable, that number gets leb128 encoding. So if you need to store a hash or some other value which behaves very close to a hash, don't store it as a u64.

This reverts part of https://github.com/rust-lang/rust/pull/117603, which turned an encoded Hash64 into a u64.

Based on https://github.com/rust-lang/rust/pull/110083, I don't expect this to be perf-sensitive on its own, though I expect that it may help stabilize some of the small rmeta size fluctuations we currently see in perf reports.
2025-02-17 06:38:14 +01:00
..
src Rollup merge of #137095 - saethlin:use-hash64-for-hashes, r=workingjubilee 2025-02-17 06:38:14 +01:00
Cargo.toml Move hashes from rustc_data_structure to rustc_hashes so they can be shared with rust-analyzer 2025-02-16 16:18:30 -05:00
messages.ftl [cg_llvm] Remove dead error message 2025-02-13 15:04:39 -08:00
README.md mv compiler to compiler/ 2020-08-30 18:45:07 +03:00

README.md

The codegen crate contains the code to convert from MIR into LLVM IR, and then from LLVM IR into machine code. In general it contains code that runs towards the end of the compilation process.

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