Function cranelift_codegen::verifier::verify_liveness

pub fn verify_liveness(
    isa: &dyn TargetIsa, 
    func: &Function, 
    cfg: &ControlFlowGraph, 
    liveness: &Liveness, 
    errors: &mut VerifierErrors
) -> VerifierStepResult<()>

Verify liveness information for func.

The provided control flow graph is assumed to be sound.

• All values in the program must have a live range.
• The live range def point must match where the value is defined.
• The live range must reach all uses.
• When a live range is live-in to a block, it must be live at all the predecessors.
• The live range affinity must be compatible with encoding constraints.

We don’t verify that live ranges are minimal. This would require recomputing live ranges for all values.