bfef2611d9
It's crazy to have the integer methods in something close to random order. The reordering makes the gaps clear: `const_i64`, `const_i128`, `const_isize`, and `const_u16`. I guess they just aren't needed.
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.