cee00c6591
The BranchTarget abstraction is no longer needed, since all branches are being emitted using a MachLabel target. Remove BranchTarget and simply use MachLabel everywhere a branch target is required. (This brings the s390x back-end in line with what x64 does as well.) In addition, simplify jumptable emission by moving all instructions that do not depend on the internal label (i.e. the conditional branch to the default label, as well as the scaling the index register) out of the combined JTSequence instruction. This refactoring will make moving branch generation to ISLE easier.
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.