free-positions ( registers reg-class -- avail-registers )

Vocabulary

compiler.cfg.linear-scan.allocation

Inputs

registers	an assoc
reg-class	an int-regs or a float-regs

Outputs

avail-registers

an assoc

Word description

Creates an alist mapping registers to their desirability for allocation. 'avail-registers' is an alist and not a hashtable because the register allocation order is significant.

See also

register-status

Definition

USING: arrays assocs sequences ;

IN: compiler.cfg.linear-scan.allocation

: free-positions ( registers reg-class -- avail-registers )
    of [ 1/0. 2array ] map ;