X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Farray-tran.lisp;h=9b0612ef0cab930b3b99cae74dcc692a12c95ed6;hb=88439f4753b11506772bac003ca43c4687a75e26;hp=05df30b0958ad74113614e436904d129c1a369b0;hpb=51e63f301624e39febdd85b5feba19b7c980f307;p=sbcl.git

diff --git a/src/compiler/array-tran.lisp b/src/compiler/array-tran.lisp
index 05df30b..9b0612e 100644
--- a/src/compiler/array-tran.lisp
+++ b/src/compiler/array-tran.lisp
@@ -112,21 +112,27 @@
   (assert-array-rank array (1- (length stuff)))
   (assert-new-value-type (car (last stuff)) array))
 
-(defoptimizer (hairy-data-vector-ref derive-type) ((array index))
-  (extract-upgraded-element-type array))
-(defoptimizer (data-vector-ref derive-type) ((array index))
-  (extract-upgraded-element-type array))
-#!+x86
+(macrolet ((define (name)
+             `(defoptimizer (,name derive-type) ((array index))
+                (extract-upgraded-element-type array))))
+  (define hairy-data-vector-ref)
+  (define hairy-data-vector-ref/check-bounds)
+  (define data-vector-ref))
+
+#!+(or x86 x86-64)
 (defoptimizer (data-vector-ref-with-offset derive-type) ((array index offset))
   (extract-upgraded-element-type array))
 
-(defoptimizer (data-vector-set derive-type) ((array index new-value))
-  (assert-new-value-type new-value array))
-#!+x86
+(macrolet ((define (name)
+             `(defoptimizer (,name derive-type) ((array index new-value))
+                (assert-new-value-type new-value array))))
+  (define hairy-data-vector-set)
+  (define hairy-data-vector-set/check-bounds)
+  (define data-vector-set))
+
+#!+(or x86 x86-64)
 (defoptimizer (data-vector-set-with-offset derive-type) ((array index offset new-value))
   (assert-new-value-type new-value array))
-(defoptimizer (hairy-data-vector-set derive-type) ((array index new-value))
-  (assert-new-value-type new-value array))
 
 ;;; Figure out the type of the data vector if we know the argument
 ;;; element type.
@@ -209,8 +215,7 @@
          ,@(mapcar (lambda (el)
                      (once-only ((n-val el))
                        `(locally (declare (optimize (safety 0)))
-                                 (setf (svref ,n-vec ,(incf n))
-                                       ,n-val))))
+                          (setf (svref ,n-vec ,(incf n)) ,n-val))))
                    elements)
          ,n-vec))))
 
@@ -661,10 +666,23 @@
                                 :node node
                                 :policy (> speed space))
   "inline non-SIMPLE-vector-handling logic"
-  (let ((element-type (upgraded-element-type-specifier-or-give-up array)))
-    `(%with-array-data-macro array start end
-                             :unsafe? ,(policy node (= safety 0))
-                             :element-type ,element-type)))
+  (let ((element-type (upgraded-element-type-specifier-or-give-up array))
+        (type (lvar-type array)))
+    (if (and (array-type-p type)
+             (listp (array-type-dimensions type))
+             (not (null (cdr (array-type-dimensions type)))))
+        ;; If it's a simple multidimensional array, then just return its
+        ;; data vector directly rather than going through
+        ;; %WITH-ARRAY-DATA-MACRO.  SBCL doesn't generally generate code
+        ;; that would use this currently, but we have encouraged users
+        ;; to use WITH-ARRAY-DATA and we may use it ourselves at some
+        ;; point in the future for optimized libraries or similar.
+        `(let ((data (truly-the (simple-array ,element-type (*))
+                                (%array-data-vector array))))
+           (values data 0 (length data) 0))
+        `(%with-array-data-macro array start end
+                                 :unsafe? ,(policy node (= safety 0))
+                                 :element-type ,element-type))))
 
 ;;;; array accessors
 
@@ -748,11 +766,69 @@
   (deftransform aref ((array &rest indices))
     (with-row-major-index (array indices index)
       (hairy-data-vector-ref array index)))
+
   (deftransform %aset ((array &rest stuff))
     (let ((indices (butlast stuff)))
       (with-row-major-index (array indices index new-value)
         (hairy-data-vector-set array index new-value)))))
 
+;; For AREF of vectors we do the bounds checking in the callee. This
+;; lets us do a significantly more efficient check for simple-arrays
+;; without bloating the code.
+(deftransform aref ((array index) (t t) * :node node)
+  (if (policy node (zerop insert-array-bounds-checks))
+      `(hairy-data-vector-ref array index)
+      `(hairy-data-vector-ref/check-bounds array index)))
+
+(deftransform %aset ((array index new-value) (t t t) * :node node)
+  (if (policy node (zerop insert-array-bounds-checks))
+      `(hairy-data-vector-set array index new-value)
+      `(hairy-data-vector-set/check-bounds array index new-value)))
+
+;;; But if we find out later that there's some useful type information
+;;; available, switch back to the normal one to give other transforms
+;;; a stab at it.
+(macrolet ((define (name transform-to extra extra-type)
+             `(deftransform ,name ((array index ,@extra))
+                (let ((type (lvar-type array))
+                      (element-type (extract-upgraded-element-type array)))
+                  ;; If an element type has been declared, we want to
+                  ;; use that information it for type checking (even
+                  ;; if the access can't be optimized due to the array
+                  ;; not being simple).
+                  (when (and (eql element-type *wild-type*)
+                             ;; This type logic corresponds to the special
+                             ;; case for strings in HAIRY-DATA-VECTOR-REF
+                             ;; (generic/vm-tran.lisp)
+                             (not (csubtypep type (specifier-type 'simple-string))))
+                    (when (or (not (array-type-p type))
+                              ;; If it's a simple array, we might be able
+                              ;; to inline the access completely.
+                              (not (null (array-type-complexp type))))
+                      (give-up-ir1-transform
+                       "Upgraded element type of array is not known at compile time."))))
+                `(,',transform-to array
+                                  (%check-bound array
+                                                (array-dimension array 0)
+                                                index)
+                                  ,@',extra))))
+  (define hairy-data-vector-ref/check-bounds
+      hairy-data-vector-ref nil nil)
+  (define hairy-data-vector-set/check-bounds
+      hairy-data-vector-set (new-value) (*)))
+
+(deftransform aref ((array index) ((or simple-vector
+                                       (simple-unboxed-array 1))
+                                   index))
+  (let ((type (lvar-type array)))
+    (unless (array-type-p type)
+      ;; Not an exactly specified one-dimensional simple array -> punt
+      ;; to the complex version.
+      (give-up-ir1-transform)))
+  `(data-vector-ref array (%check-bound array
+                                        (array-dimension array 0)
+                                        index)))
+
 ;;; Just convert into a HAIRY-DATA-VECTOR-REF (or
 ;;; HAIRY-DATA-VECTOR-SET) after checking that the index is inside the
 ;;; array total size.