7a9479f77c
This adds infrastructure to allow implementing call and return instructions in ISLE, and migrates the s390x back-end. To implement ABI details, this patch creates public accessors for `ABISig` and makes them accessible in ISLE. All actual code generation is then done in ISLE rules, following the information provided by that signature. [ Note that the s390x back end never requires multiple slots for a single argument - the infrastructure to handle this should already be present, however. ] To implement loops in ISLE rules, this patch uses regular tail recursion, employing a `Range` data structure holding a range of integers to be looped over.
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.