def-is-use-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 def-is-use-insn class.

Definition

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

IN: compiler.cfg.instructions

: def-is-use-insn? ( object -- ? )
    dup tuple? [
        layout-of
        dup
        1
        slot
        15
        fixnum>=
        [
            15
            slot
            dup
            \ ##unbox-any-c-ptr
            eq?
            [ drop t ]
            [
                dup \ ##box-displaced-alien eq?
                [ drop t ] [ \ ##box-alien eq? ] if
            ]
            if
        ]
        [ drop f ]
        if
    ] [ drop f ] if ;