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* Cranelift: Introduce the `tail` calling convention This is an unstable-ABI calling convention that we will eventually use to support Wasm tail calls. Co-Authored-By: Jamey Sharp <jsharp@fastly.com> * Cranelift: Introduce the `return_call` and `return_call_indirect` instructions These will be used to implement tail calls for Wasm and any other language targeting CLIF. The `return_call_indirect` instruction differs from the Wasm instruction of the same name by taking a native address callee rather than a Wasm function index. Co-Authored-By: Jamey Sharp <jsharp@fastly.com> * Cranelift: Implement verification rules for `return_call[_indirect]` They must: * have the same return types between the caller and callee, * have the same calling convention between caller and callee, * and that calling convention must support tail calls. Co-Authored-By: Jamey Sharp <jsharp@fastly.com> * cargo fmt --------- Co-authored-by: Jamey Sharp <jsharp@fastly.com>
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.