needs-predecessors ( cfg -- )

Vocabulary

compiler.cfg.predecessors

Inputs

cfg

a cfg

Outputs

None

Word description

Computes predecessor info for the cfg unless it already is up-to-date.

Definition

USING: accessors compiler.cfg.predecessors.private kernel ;

IN: compiler.cfg.predecessors

: needs-predecessors ( cfg -- )
    dup predecessors-valid?>>
    [ drop ] [ t >>predecessors-valid? compute-predecessors ] if
    ;