src/compiler/policies.lisp

   1 ;;;; aimed optimization qualities
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   6 ;;;; This software is derived from the CMU CL system, which was
   7 ;;;; written at Carnegie Mellon University and released into the
   8 ;;;; public domain. The software is in the public domain and is
   9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
  10 ;;;; files for more information.
  11
  12 (in-package "SB!C")
  13
  14 (define-optimization-quality type-check
  15     (cond ((= safety 0) 0)
  16           ;; FIXME: It is duplicated in PROBABLE-TYPE-CHECK-P and in
  17           ;; some other places.
  18           ((and (<= speed safety)
  19                 (<= space safety)
  20                 (<= compilation-speed safety))
  21            3)
  22           (t 2))
  23   ("no" "maybe" "fast" "full"))
  24
  25 (define-optimization-quality check-tag-existence
  26     (cond ((= safety 0) 0)
  27           (t 3))
  28   ("no" "maybe" "yes" "yes"))
  29
  30 (define-optimization-quality let-convertion
  31     (if (<= debug speed) 3 0)
  32   ("off" "maybe" "on" "on"))
  33
  34 (define-optimization-quality verify-arg-count
  35     (if (zerop safety) 0 3)
  36   ("no" "maybe" "yes" "yes"))
  37
  38 (define-optimization-quality merge-tail-calls
  39     (if (or (> space debug)
  40             (> speed debug))
  41         3
  42         0)
  43   ("no" "maybe" "yes" "yes"))
  44
  45 (define-optimization-quality insert-debug-catch
  46     (if (> debug (max speed space))
  47         3
  48         0)
  49   ("no" "maybe" "yes" "yes"))
  50
  51 (define-optimization-quality recognize-self-calls
  52     (if (> (max speed space) debug)
  53         3
  54         0)
  55   ("no" "maybe" "yes" "yes"))
  56
  57 (define-optimization-quality stack-allocate-dynamic-extent
  58     (if (and (> (max speed space) (max debug safety))
  59              (< safety 3))
  60         3
  61         0)
  62   ("no" "maybe" "yes" "yes"))
  63
  64 (define-optimization-quality stack-allocate-vector
  65     (cond ((= stack-allocate-dynamic-extent 0) 0)
  66           ((= safety 0) 3)
  67           (t 2))
  68   ("no" "maybe" "one page" "yes"))
  69
  70 (define-optimization-quality float-accuracy
  71     3
  72   ("degraded" "full" "full" "full"))
  73
  74 (define-optimization-quality insert-step-conditions
  75     (if (> debug (max speed space compilation-speed))
  76         debug
  77         0)
  78   ("no" "no" "partial" "full"))