X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Ffloat-tran.lisp;h=262f86777cae2a22f469e98076068ceda5b4af71;hb=2c06e3056fe6aa820817a927fa0e840eb7b8edb7;hp=a4672e5283a0036ad7e0092e47dddb477106df5e;hpb=9be4fffc49a9a3f4e25817dd436a380ac562c3ad;p=sbcl.git

diff --git a/src/compiler/float-tran.lisp b/src/compiler/float-tran.lisp
index a4672e5..262f867 100644
--- a/src/compiler/float-tran.lisp
+++ b/src/compiler/float-tran.lisp
@@ -15,8 +15,8 @@
 
 ;;;; coercions
 
-(defknown %single-float (real) single-float (movable foldable flushable))
-(defknown %double-float (real) double-float (movable foldable flushable))
+(defknown %single-float (real) single-float (movable foldable))
+(defknown %double-float (real) double-float (movable foldable))
 
 (deftransform float ((n f) (* single-float) *)
   '(%single-float n))
@@ -286,7 +286,10 @@
                 (specifier-type `(,',type ,(or lo '*) ,(or hi '*)))))
 
             (defoptimizer (,fun derive-type) ((num))
-              (one-arg-derive-type num #',aux-name #',fun))))))
+              (handler-case
+                  (one-arg-derive-type num #',aux-name #',fun)
+                (type-error ()
+                  nil)))))))
   (frob %single-float single-float
         most-negative-single-float most-positive-single-float)
   (frob %double-float double-float
@@ -295,15 +298,29 @@
 
 ;;;; float contagion
 
+(defun safe-ctype-for-single-coercion-p (x)
+  ;; See comment in SAFE-SINGLE-COERCION-P -- this deals with the same
+  ;; problem, but in the context of evaluated and compiled (+ <int> <single>)
+  ;; giving different result if we fail to check for this.
+  (or (not (csubtypep x (specifier-type 'integer)))
+      (csubtypep x (specifier-type `(integer ,most-negative-exactly-single-float-fixnum
+                                             ,most-positive-exactly-single-float-fixnum)))))
+
 ;;; Do some stuff to recognize when the loser is doing mixed float and
 ;;; rational arithmetic, or different float types, and fix it up. If
 ;;; we don't, he won't even get so much as an efficiency note.
 (deftransform float-contagion-arg1 ((x y) * * :defun-only t :node node)
-  `(,(lvar-fun-name (basic-combination-fun node))
-    (float x y) y))
+  (if (or (not (types-equal-or-intersect (lvar-type y) (specifier-type 'single-float)))
+          (safe-ctype-for-single-coercion-p (lvar-type x)))
+      `(,(lvar-fun-name (basic-combination-fun node))
+         (float x y) y)
+      (give-up-ir1-transform)))
 (deftransform float-contagion-arg2 ((x y) * * :defun-only t :node node)
-  `(,(lvar-fun-name (basic-combination-fun node))
-    x (float y x)))
+  (if (or (not (types-equal-or-intersect (lvar-type x) (specifier-type 'single-float)))
+          (safe-ctype-for-single-coercion-p (lvar-type y)))
+      `(,(lvar-fun-name (basic-combination-fun node))
+         x (float y x))
+      (give-up-ir1-transform)))
 
 (dolist (x '(+ * / -))
   (%deftransform x '(function (rational float) *) #'float-contagion-arg1)