admissible-registers ( cfg -- regs )

Vocabulary

compiler.cfg.linear-scan

Inputs

cfg

a cfg

Outputs

regs

an assoc

Word description

Lists all registers usable by the cfg by register class. In general, that's all registers except the frame pointer register that might be used by the cfg for other purposes.

Definition

USING: accessors assocs cpu.architecture kernel sequences ;

IN: compiler.cfg.linear-scan

: admissible-registers ( cfg -- regs )
    machine-registers swap frame-pointer?>>
    [ [ [ frame-reg = ] reject ] assoc-map ] when ;