X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fltn.lisp;h=d2b162e7936d0111b712ddccce780b1e6b45f4d5;hb=HEAD;hp=b790f42a5bdf382fefc5626b3782f162fe249742;hpb=d604a358d8e5eb5587989e0a4f1d31dbe6ac5ffe;p=sbcl.git

diff --git a/src/compiler/ltn.lisp b/src/compiler/ltn.lisp
index b790f42..d2b162e 100644
--- a/src/compiler/ltn.lisp
+++ b/src/compiler/ltn.lisp
@@ -64,39 +64,18 @@
   (declare (type lvar lvar))
   (ir2-lvar-primitive-type (lvar-info lvar)))
 
-;;; Return true if a constant LEAF is of a type which we can legally
-;;; directly reference in code. Named constants with arbitrary pointer
-;;; values cannot, since we must preserve EQLness.
-;;;
-;;; FIXME: why not?  The values in a function's constant vector are
-;;; subject to being moved by the garbage collector.  Having arbitrary
-;;; values in said vector doesn't seem like a problem.
-(defun legal-immediate-constant-p (leaf)
-  (declare (type constant leaf))
-  (or (not (leaf-has-source-name-p leaf))
-      ;; Specialized arrays are legal, too.  KLUDGE: this would be
-      ;; *much* cleaner if SIMPLE-UNBOXED-ARRAY was defined on the host.
-      #.(loop for saetp across sb!vm:*specialized-array-element-type-properties*
-              unless (eq t (sb!vm:saetp-specifier saetp))
-              collect `((simple-array ,(sb!vm:saetp-specifier saetp) (*)) t) into cases
-              finally (return
-                        `(typecase (constant-value leaf)
-                           ((or number character) t)
-                           (symbol (symbol-package (constant-value leaf)))
-                           ,@cases
-                           (t nil))))))
-
 ;;; If LVAR is used only by a REF to a leaf that can be delayed, then
 ;;; return the leaf, otherwise return NIL.
 (defun lvar-delayed-leaf (lvar)
   (declare (type lvar lvar))
-  (let ((use (lvar-uses lvar)))
-    (and (ref-p use)
-         (let ((leaf (ref-leaf use)))
-           (etypecase leaf
-             (lambda-var (if (null (lambda-var-sets leaf)) leaf nil))
-             (constant (if (legal-immediate-constant-p leaf) leaf nil))
-             ((or functional global-var) nil))))))
+  (unless (lvar-dynamic-extent lvar)
+    (let ((use (lvar-uses lvar)))
+      (and (ref-p use)
+           (let ((leaf (ref-leaf use)))
+             (etypecase leaf
+               (lambda-var (if (null (lambda-var-sets leaf)) leaf nil))
+               (constant leaf)
+               ((or functional global-var) nil)))))))
 
 ;;; Annotate a normal single-value lvar. If its only use is a ref that
 ;;; we are allowed to delay the evaluation of, then we mark the lvar
@@ -388,7 +367,7 @@
     (unless (and (combination-p use)
                  (let ((info (basic-combination-info use)))
                    (and (template-p info)
-                        (eq (template-result-types info) :conditional))))
+                        (template-conditional-p info))))
       (annotate-ordinary-lvar test)))
   (values))
 
@@ -544,7 +523,7 @@
                    (if (and safe-p (template-args-ok template call nil))
                        :arg-check
                        :arg-types)))
-          ((eq (template-result-types template) :conditional)
+          ((template-conditional-p template)
            (let ((dest (lvar-dest lvar)))
              (if (and (if-p dest)
                       (immediately-used-p (if-test dest) call))
@@ -627,7 +606,7 @@
 
 (defvar *efficiency-note-cost-threshold* 5
   #!+sb-doc
-  "This is the minumum cost difference between the chosen implementation and
+  "This is the minimum cost difference between the chosen implementation and
   the next alternative that justifies an efficiency note.")
 (declaim (type index *efficiency-note-cost-threshold*))