X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fir1util.lisp;h=4f433b16286f889a80715e20ba18d938006e216b;hb=aecefb5d1dfdab6b004796c8b0b48fd2ab6643df;hp=e3ef6cfef7db4c28ac0f245eb1494c60c785d8c2;hpb=edb7acf8d242c0398ec33924e21c85dc54bc768d;p=sbcl.git

diff --git a/src/compiler/ir1util.lisp b/src/compiler/ir1util.lisp
index e3ef6cf..4f433b1 100644
--- a/src/compiler/ir1util.lisp
+++ b/src/compiler/ir1util.lisp
@@ -149,6 +149,16 @@
            (t (eq (block-start (first (block-succ (node-block node))))
                   (node-prev dest))))))
 
+;;; Returns the defined (usually untrusted) type of the combination,
+;;; or NIL if we couldn't figure it out.
+(defun combination-defined-type (combination)
+  (let ((use (principal-lvar-use (basic-combination-fun combination))))
+    (or (when (ref-p use)
+          (let ((type (leaf-defined-type (ref-leaf use))))
+            (when (fun-type-p type)
+              (fun-type-returns type))))
+        *wild-type*)))
+
 ;;; Return true if LVAR destination is executed after node with only
 ;;; uninteresting nodes intervening.
 ;;;