8b1ba11cb1
Implement repr(packed) for repr(simd) This allows creating vectors with non-power-of-2 lengths that do not have padding. See rust-lang/portable-simd#319
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.