19 lines
536 B
Factor
19 lines
536 B
Factor
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! Copyright (C) 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel accessors namespaces sequences.next compiler.lvops ;
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IN: compiler.machine.simplifier
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: useless-branch? ( next insn -- ? )
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2dup [ _label? ] [ _b? ] bi* and
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[ [ label>> ] bi@ = ] [ 2drop f ] if ;
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: simplify-mr ( insns -- insns )
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#! Remove unconditional branches to labels immediately
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#! following.
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[
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[
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tuck useless-branch?
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[ drop ] [ , ] if
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] each-next
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] { } make ;
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