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 locals
   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 compiler.cfg.linear-scan.resolve ;
  14 IN: compiler.cfg.linear-scan
  15
  16 ! References:
  17
  18 ! Linear Scan Register Allocation
  19 ! by Massimiliano Poletto and Vivek Sarkar
  20 ! http://www.cs.ucla.edu/~palsberg/course/cs132/linearscan.pdf
  21
  22 ! Linear Scan Register Allocation for the Java HotSpot Client Compiler
  23 ! by Christian Wimmer
  24 ! and http://www.ssw.uni-linz.ac.at/Research/Papers/Wimmer04Master/
  25
  26 ! Quality and Speed in Linear-scan Register Allocation
  27 ! by Omri Traub, Glenn Holloway, Michael D. Smith
  28 ! http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.34.8435
  29
  30 :: (linear-scan) ( rpo machine-registers -- )
  31     rpo number-instructions
  32     rpo compute-live-intervals machine-registers allocate-registers
  33     rpo assign-registers
  34     rpo resolve-data-flow
  35     rpo check-numbering ;
  36
  37 : linear-scan ( cfg -- cfg' )
  38     [
  39         dup reverse-post-order machine-registers (linear-scan)
  40         spill-counts get >>spill-counts
  41     ] with-scope ;