src/compiler/generic/vm-ir2tran.lisp

   1 ;;;; This software is part of the SBCL system. See the README file for
   2 ;;;; more information.
   3 ;;;;
   4 ;;;; This software is derived from the CMU CL system, which was
   5 ;;;; written at Carnegie Mellon University and released into the
   6 ;;;; public domain. The software is in the public domain and is
   7 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
   8 ;;;; files for more information.
   9
  10 (in-package "SB!C")
  11
  12 (def-alloc %make-structure-instance 1 :structure-alloc
  13            sb!vm:instance-header-widetag sb!vm:instance-pointer-lowtag
  14            nil)
  15
  16 (defoptimizer (%make-structure-instance stack-allocate-result) ((&rest args) node dx)
  17   (declare (ignore node dx))
  18   t)
  19
  20 (defoptimizer ir2-convert-reffer ((object) node block name offset lowtag)
  21   (let* ((lvar (node-lvar node))
  22          (locs (lvar-result-tns lvar
  23                                         (list *backend-t-primitive-type*)))
  24          (res (first locs)))
  25     (vop slot node block (lvar-tn node block object)
  26          name offset lowtag res)
  27     (move-lvar-result node block locs lvar)))
  28
  29 (defoptimizer ir2-convert-setter ((object value) node block name offset lowtag)
  30   (let ((value-tn (lvar-tn node block value)))
  31     (vop set-slot node block (lvar-tn node block object) value-tn
  32          name offset lowtag)
  33     (move-lvar-result node block (list value-tn) (node-lvar node))))
  34
  35 ;;; FIXME: Isn't there a name for this which looks less like a typo?
  36 ;;; (The name IR2-CONVERT-SETTER is used for something else, just above.)
  37 (defoptimizer ir2-convert-setfer ((value object) node block name offset lowtag)
  38   (let ((value-tn (lvar-tn node block value)))
  39     (vop set-slot node block (lvar-tn node block object) value-tn
  40          name offset lowtag)
  41     (move-lvar-result node block (list value-tn) (node-lvar node))))
  42
  43 #!+compare-and-swap-vops
  44 (defoptimizer ir2-convert-casser
  45     ((object old new) node block name offset lowtag)
  46   (let* ((lvar (node-lvar node))
  47          (locs (lvar-result-tns lvar (list *backend-t-primitive-type*)))
  48          (res (first locs)))
  49     (vop compare-and-swap-slot node block
  50          (lvar-tn node block object)
  51          (lvar-tn node block old)
  52          (lvar-tn node block new)
  53          name offset lowtag
  54          res)
  55     (move-lvar-result node block locs lvar)))
  56
  57 (defun emit-inits (node block name object lowtag instance-length inits args)
  58   #!-raw-instance-init-vops
  59   (declare (ignore instance-length))
  60   (let ((unbound-marker-tn nil)
  61         (funcallable-instance-tramp-tn nil))
  62     (dolist (init inits)
  63       (let ((kind (car init))
  64             (slot (cdr init)))
  65         (case kind
  66           (:slot
  67            (let ((raw-type (pop slot))
  68                  (arg-tn (lvar-tn node block (pop args))))
  69              (macrolet ((make-case ()
  70                           `(ecase raw-type
  71                              ((t)
  72                               (vop set-slot node block object arg-tn
  73                                    name (+ sb!vm:instance-slots-offset slot) lowtag))
  74                              ,@(mapcar (lambda (rsd)
  75                                          `(,(sb!kernel::raw-slot-data-raw-type rsd)
  76                                             (vop ,(sb!kernel::raw-slot-data-init-vop rsd)
  77                                                  node block
  78                                                  object arg-tn instance-length slot)))
  79                                        #!+raw-instance-init-vops
  80                                        sb!kernel::*raw-slot-data-list*
  81                                        #!-raw-instance-init-vops
  82                                        nil))))
  83                (make-case))))
  84           (:dd
  85            (vop set-slot node block object
  86                 (emit-constant (sb!kernel::dd-layout-or-lose slot))
  87                 name sb!vm:instance-slots-offset lowtag))
  88           (otherwise
  89            (vop set-slot node block object
  90                 (ecase kind
  91                   (:arg
  92                    (aver args)
  93                    (lvar-tn node block (pop args)))
  94                   (:unbound
  95                    (or unbound-marker-tn
  96                        (setf unbound-marker-tn
  97                              (let ((tn (make-restricted-tn
  98                                         nil
  99                                         (sc-number-or-lose 'sb!vm::any-reg))))
 100                                (vop make-unbound-marker node block tn)
 101                                tn))))
 102                   (:null
 103                    (emit-constant nil))
 104                   (:funcallable-instance-tramp
 105                    (or funcallable-instance-tramp-tn
 106                        (setf funcallable-instance-tramp-tn
 107                              (let ((tn (make-restricted-tn
 108                                         nil
 109                                         (sc-number-or-lose 'sb!vm::any-reg))))
 110                                (vop make-funcallable-instance-tramp node block tn)
 111                                tn)))))
 112                 name slot lowtag))))))
 113   (unless (null args)
 114     (bug "Leftover args: ~S" args)))
 115
 116 (defun emit-fixed-alloc (node block name words type lowtag result lvar)
 117   (let ((stack-allocate-p (and lvar (lvar-dynamic-extent lvar))))
 118     (when stack-allocate-p
 119       (vop current-stack-pointer node block
 120            (ir2-lvar-stack-pointer (lvar-info lvar))))
 121     (vop fixed-alloc node block name words type lowtag stack-allocate-p result)))
 122
 123 (defoptimizer ir2-convert-fixed-allocation
 124               ((&rest args) node block name words type lowtag inits)
 125   (let* ((lvar (node-lvar node))
 126          (locs (lvar-result-tns lvar (list *backend-t-primitive-type*)))
 127          (result (first locs)))
 128     (emit-fixed-alloc node block name words type lowtag result lvar)
 129     (emit-inits node block name result lowtag words inits args)
 130     (move-lvar-result node block locs lvar)))
 131
 132 (defoptimizer ir2-convert-variable-allocation
 133               ((extra &rest args) node block name words type lowtag inits)
 134   (let* ((lvar (node-lvar node))
 135          (locs (lvar-result-tns lvar (list *backend-t-primitive-type*)))
 136          (result (first locs)))
 137     (if (constant-lvar-p extra)
 138         (let ((words (+ (lvar-value extra) words)))
 139           (emit-fixed-alloc node block name words type lowtag result lvar))
 140         (vop var-alloc node block (lvar-tn node block extra) name words
 141              type lowtag result))
 142     (emit-inits node block name result lowtag nil inits args)
 143     (move-lvar-result node block locs lvar)))
 144
 145 (defoptimizer ir2-convert-structure-allocation
 146     ((dd slot-specs &rest args) node block name words type lowtag inits)
 147   (let* ((lvar (node-lvar node))
 148          (locs (lvar-result-tns lvar (list *backend-t-primitive-type*)))
 149          (result (first locs)))
 150     (aver (constant-lvar-p dd))
 151     (aver (constant-lvar-p slot-specs))
 152     (let* ((c-dd (lvar-value dd))
 153            (c-slot-specs (lvar-value slot-specs))
 154            (words (+ (sb!kernel::dd-instance-length c-dd) words)))
 155       (emit-fixed-alloc node block name words type lowtag result lvar)
 156       (emit-inits node block name result lowtag words `((:dd . ,c-dd) ,@c-slot-specs) args)
 157       (move-lvar-result node block locs lvar))))
 158
 159 ;;; :SET-TRANS (in objdef.lisp DEFINE-PRIMITIVE-OBJECT) doesn't quite
 160 ;;; cut it for symbols, where under certain compilation options
 161 ;;; (e.g. #!+SB-THREAD) we have to do something complicated, rather
 162 ;;; than simply set the slot.  So we build the IR2 converting function
 163 ;;; by hand.  -- CSR, 2003-05-08
 164 (let ((fun-info (fun-info-or-lose '%set-symbol-value)))
 165   (setf (fun-info-ir2-convert fun-info)
 166         (lambda (node block)
 167           (let ((args (basic-combination-args node)))
 168             (destructuring-bind (symbol value) args
 169               (let ((value-tn (lvar-tn node block value)))
 170                 (vop set node block
 171                      (lvar-tn node block symbol) value-tn)
 172                 (move-lvar-result
 173                  node block (list value-tn) (node-lvar node))))))))
 174
 175 ;;; Stack allocation optimizers per platform support
 176 ;;;
 177 ;;; Platforms with stack-allocatable vectors
 178 #!+(or x86 x86-64)
 179 (progn
 180   (defoptimizer (allocate-vector stack-allocate-result)
 181       ((type length words) node dx)
 182     (or (eq dx :truly)
 183         (zerop (policy node safety))
 184         ;; a vector object should fit in one page -- otherwise it might go past
 185         ;; stack guard pages.
 186         (values-subtypep (lvar-derived-type words)
 187                          (load-time-value
 188                           (specifier-type `(integer 0 ,(- (/ sb!vm::*backend-page-size*
 189                                                              sb!vm:n-word-bytes)
 190                                                           sb!vm:vector-data-offset)))))))
 191
 192   (defoptimizer (allocate-vector ltn-annotate) ((type length words) call ltn-policy)
 193     (let ((args (basic-combination-args call))
 194           (template (template-or-lose (if (awhen (node-lvar call)
 195                                             (lvar-dynamic-extent it))
 196                                           'sb!vm::allocate-vector-on-stack
 197                                           'sb!vm::allocate-vector-on-heap))))
 198       (dolist (arg args)
 199         (setf (lvar-info arg)
 200               (make-ir2-lvar (primitive-type (lvar-type arg)))))
 201       (unless (is-ok-template-use template call (ltn-policy-safe-p ltn-policy))
 202         (ltn-default-call call)
 203         (return-from allocate-vector-ltn-annotate-optimizer (values)))
 204       (setf (basic-combination-info call) template)
 205       (setf (node-tail-p call) nil)
 206
 207       (dolist (arg args)
 208         (annotate-1-value-lvar arg)))))
 209
 210 ;;; ...lists
 211 #!+(or alpha mips ppc sparc x86 x86-64)
 212 (progn
 213   (defoptimizer (list stack-allocate-result) ((&rest args) node dx)
 214     (declare (ignore node dx))
 215     (not (null args)))
 216   (defoptimizer (list* stack-allocate-result) ((&rest args) node dx)
 217     (declare (ignore node dx))
 218     (not (null (rest args))))
 219   (defoptimizer (%listify-rest-args stack-allocate-result) ((&rest args) node dx)
 220     (declare (ignore node dx))
 221     t))
 222
 223 ;;; ...conses
 224 #!+(or x86 x86-64)
 225 (defoptimizer (cons stack-allocate-result) ((&rest args) node dx)
 226   (declare (ignore node dx))
 227   t)