basis/compiler/cfg/linear-scan/linear-scan.factor

   1 ! Copyright (C) 2008, 2009 Slava Pestov.
   2 ! See http://factorcode.org/license.txt for BSD license.
   3 USING: kernel accessors namespaces make
   4 cpu.architecture
   5 compiler.cfg
   6 compiler.cfg.rpo
   7 compiler.cfg.instructions
   8 compiler.cfg.linear-scan.numbering
   9 compiler.cfg.linear-scan.live-intervals
  10 compiler.cfg.linear-scan.allocation
  11 compiler.cfg.linear-scan.allocation.state
  12 compiler.cfg.linear-scan.assignment ;
  13 IN: compiler.cfg.linear-scan
  14
  15 ! References:
  16
  17 ! Linear Scan Register Allocation
  18 ! by Massimiliano Poletto and Vivek Sarkar
  19 ! http://www.cs.ucla.edu/~palsberg/course/cs132/linearscan.pdf
  20
  21 ! Linear Scan Register Allocation for the Java HotSpot Client Compiler
  22 ! by Christian Wimmer
  23 ! and http://www.ssw.uni-linz.ac.at/Research/Papers/Wimmer04Master/
  24
  25 ! Quality and Speed in Linear-scan Register Allocation
  26 ! by Omri Traub, Glenn Holloway, Michael D. Smith
  27 ! http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.34.8435
  28
  29 : (linear-scan) ( rpo machine-registers -- )
  30     [
  31         dup number-instructions
  32         dup compute-live-intervals
  33     ] dip
  34     allocate-registers assign-registers ;
  35
  36 : linear-scan ( cfg -- cfg' )
  37     [
  38         dup reverse-post-order machine-registers (linear-scan)
  39         spill-counts get >>spill-counts
  40     ] with-scope ;