Introducing MIRWe are in the final stages of a grand transformation on the Rust compiler internals. Over the past year or so, we have been steadily working on a plan to change our internal compiler pipeline, as shown here: That is, we are introducing a new intermediate representation (IR) of your program that we call MIR: MIR stands for mid-level IR, because the MIR comes between the existing HIR ("high-level IR
