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86a49fd71f
avoid phi node for pointers flowing into Vec appends Elide temporary allocations in patterns like `vec.append(slice.to_vec())` related discussion: https://rust-lang.zulipchat.com/#narrow/stream/187780-t-compiler.2Fwg-llvm/topic/nocapture.20and.20allocation.20elimination
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.