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b5376ba601
rust/compiler/rustc_codegen_llvm
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Scott McMurray b5376ba601 Remove my scalar_copy_backend_type optimization attempt 
I added this back in 111999, but I no longer think it's a good idea
- It had to get scaled back to only power-of-two things to not break a bunch of targets
- LLVM seems to be getting better at memcpy removal anyway
- Introducing vector instructions has seemed to sometimes (115515) make autovectorization worse

So this removes it from the codegen crates entirely, and instead just tries to use <https://doc.rust-lang.org/nightly/nightly-rustc/rustc_codegen_ssa/traits/builder/trait.BuilderMethods.html#method.typed_place_copy> instead of direct `memcpy` so things will still use load/store for immediates.
2024-04-09 08:51:32 -07:00
..
src Remove my scalar_copy_backend_type optimization attempt 2024-04-09 08:51:32 -07:00
Cargo.toml sanitizers: Create the rustc_sanitizers crate 2024-04-08 12:05:41 -07:00
messages.ftl Emit a diagnostic for invalid target options 2024-02-03 22:03:25 -05:00
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.