41 lines
1.1 KiB
Factor
41 lines
1.1 KiB
Factor
! Copyright (C) 2008, 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: namespaces assocs kernel accessors
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sorting sets sequences arrays
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cpu.architecture
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sequences.deep
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compiler.cfg
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compiler.cfg.rpo
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compiler.cfg.def-use
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compiler.cfg.instructions
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compiler.cfg.value-numbering.graph
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compiler.cfg.value-numbering.expressions
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compiler.cfg.value-numbering.simplify
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compiler.cfg.value-numbering.rewrite ;
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IN: compiler.cfg.value-numbering
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! Local value numbering.
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: >copy ( insn -- insn/##copy )
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dup defs-vreg dup vreg>vn vn>vreg
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2dup eq? [ 2drop ] [ any-rep \ ##copy new-insn nip ] if ;
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GENERIC: process-instruction ( insn -- insn' )
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M: insn process-instruction
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dup rewrite
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[ process-instruction ]
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[ dup defs-vreg [ dup number-values >copy ] when ] ?if ;
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M: array process-instruction
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[ process-instruction ] map ;
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: value-numbering-step ( insns -- insns' )
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init-value-graph
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[ process-instruction ] map flatten ;
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: value-numbering ( cfg -- cfg' )
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[ value-numbering-step ] local-optimization
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cfg-changed predecessors-changed ;
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