expire-old-intervals ( n pending-heap -- )
Assigning registers to live intervals

Prev:	pending-interval-assoc
Next:	remove-pending ( live-interval -- )

Vocabulary
compiler.cfg.linear-scan.assignment

Inputs

n	an integer
pending-heap	a min-heap

Outputs
None

Word description
Expires all intervals older than the cutoff point. First they are removed from the 'pending-heap' and pending-interval-assoc. Then ##spill instructions are inserted for each interval that was removed.

Definition

USING: compiler.cfg.utilities kernel math sequences ;

IN: compiler.cfg.linear-scan.assignment

: expire-old-intervals ( n pending-heap -- )
    [ > ] with heap-pop-while [ expire-interval ] each ;