50 lines
1.5 KiB
Factor
50 lines
1.5 KiB
Factor
! Copyright (C) 2008, 2010 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel accessors assocs sequences namespaces make locals
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cpu.architecture
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compiler.cfg
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compiler.cfg.rpo
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compiler.cfg.registers
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compiler.cfg.instructions
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compiler.cfg.linear-scan.numbering
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compiler.cfg.linear-scan.live-intervals
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compiler.cfg.linear-scan.allocation
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compiler.cfg.linear-scan.allocation.state
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compiler.cfg.linear-scan.assignment
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compiler.cfg.linear-scan.resolve ;
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FROM: assocs => change-at ;
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IN: compiler.cfg.linear-scan
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! References:
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! Linear Scan Register Allocation
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! by Massimiliano Poletto and Vivek Sarkar
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! http://www.cs.ucla.edu/~palsberg/course/cs132/linearscan.pdf
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! Linear Scan Register Allocation for the Java HotSpot Client Compiler
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! by Christian Wimmer
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! and http://www.ssw.uni-linz.ac.at/Research/Papers/Wimmer04Master/
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! Quality and Speed in Linear-scan Register Allocation
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! by Omri Traub, Glenn Holloway, Michael D. Smith
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! http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.34.8435
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! SSA liveness must have been computed already
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:: (linear-scan) ( cfg machine-registers -- )
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cfg number-instructions
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cfg compute-live-intervals machine-registers allocate-registers
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cfg assign-registers
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cfg resolve-data-flow
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cfg check-numbering ;
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: admissible-registers ( cfg -- regs )
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[ machine-registers ] dip
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frame-pointer?>> [
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[ int-regs ] dip [ clone ] map
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[ [ [ frame-reg ] dip remove ] change-at ] keep
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] when ;
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: linear-scan ( cfg -- cfg' )
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dup dup admissible-registers (linear-scan) ;
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