useless-compare? ( insn -- ? )

Vocabulary

compiler.cfg.alias-analysis

Inputs

insn	a ##compare instruction

Outputs

?

a boolean

Word description

Checks if the comparison instruction is required.

Definition

USING: accessors combinators.short-circuit
compiler.cfg.comparisons kernel ;

IN: compiler.cfg.alias-analysis

: useless-compare? ( insn -- ? )
    {
        [ cc>> cc= eq? ]
        [
            [ src1>> ] [ src2>> ] bi [ resolve vreg>ac ] same?
            not
        ]
    } 1&& ; inline