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649e80184b
This makes sure that &[] is just as efficient as indirecting through unsafe code (from_raw_parts). No new stable guarantee is intended about whether or not we do this, this is just an optimization. Co-authored-by: Ralf Jung <post@ralfj.de>
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.