Function cranelift_codegen::binemit::relax_branches

pub fn relax_branches(
    func: &mut Function, 
    _cfg: &mut ControlFlowGraph, 
    _domtree: &mut DominatorTree, 
    isa: &dyn TargetIsa
) -> CodegenResult<CodeInfo>

Relax branches and compute the final layout of block headers in func.

Fill in the func.offsets table so the function is ready for binary emission.