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This patch adds the MachInst, or Machine Instruction, infrastructure. This is the machine-independent portion of the new backend design. It contains the implementation of the "vcode" (virtual-registerized code) container, the top-level lowering algorithm and compilation pipeline, and the trait definitions that the machine backends will fill in. This backend infrastructure is included in the compilation of the `codegen` crate, but it is not yet tied into the public APIs; that patch will come last, after all the other pieces are filled in. This patch contains code written by Julian Seward <jseward@acm.org> and Benjamin Bouvier <public@benj.me>, originally developed on a side-branch before rebasing and condensing into this patch series. See the `arm64` branch at `https://github.com/cfallin/wasmtime` for original development history. Co-authored-by: Julian Seward <jseward@acm.org> Co-authored-by: Benjamin Bouvier <public@benj.me>
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.