03793b71a7
This PR removes "argument polarity": the feature of ISLE extractors that lets them take inputs aside from the value to be matched. Cases that need this expressivity have been subsumed by #4072 with if-let clauses; we can now finally remove this misfeature of the language, which has caused significant confusion and has always felt like a bit of a hack. This PR (i) removes the feature from the ISLE compiler; (ii) removes it from the reference documentation; and (iii) refactors away all uses of the feature in our three existing backends written in ISLE.
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.