f0af622208
* Refactor lower_branch to have Unit result Branches cannot have any output, so it is more straightforward to have the ISLE term return Unit instead of InstOutput. Also provide a new `emit_side_effect` term to simplify implementation of `lower_branch` rules with Unit result. * Simplify LowerBackend interface Move all remaining asserts from the LowerBackend::lower and ::lower_branch_group into the common call site. Change return value of ::lower to Option<InstOutput>, and return value of ::lower_branch_group to Option<()> to match ISLE term signature. Only pass the first branch into ::lower_branch_group and rename it to ::lower_branch. As a result of all those changes, LowerBackend routines now consists solely to calls to the corresponding ISLE routines.
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.