gc-map-insn? ( object -- ? )

Vocabulary

compiler.cfg.instructions

Inputs and outputs

object	an object
?	a boolean

Word description

Tests if the object is an instance of the gc-map-insn class.

Definition

USING: classes.tuple.private kernel math.private slots.private ;

IN: compiler.cfg.instructions

: gc-map-insn? ( object -- ? )
    dup tuple? [
        layout-of
        dup
        dup
        1
        slot
        15
        fixnum>=
        [
            15
            slot
            dup
            \ ##box-long-long
            eq?
            [ drop t ]
            [ \ ##box eq? ]
            if
        ]
        [ drop f ]
        if
        [ drop t ]
        [
            dup dup 1 slot 11 fixnum>= [
                11
                slot
                dup
                \ ##alien-invoke
                eq?
                [ drop t ]
                [ \ ##alien-indirect eq? ]
                if
            ] [ drop f ] if
            [ drop t ] [
                dup
                1
                slot
                9
                fixnum>=
                [ 9 slot \ ##call-gc eq? ]
                [ drop f ]
                if
            ] if
        ]
        if
    ] [ drop f ] if ;