1.0.13.10: x86 MOVE-FROM-SIGNED & MOVE-FROM-UNSIGNED hackery

[sbcl.git] / src / compiler / ir1util.lisp

diff --git a/src/compiler/ir1util.lisp b/src/compiler/ir1util.lisp
index bd6357e..cba2914 100644 (file)
--- a/src/compiler/ir1util.lisp
+++ b/src/compiler/ir1util.lisp
@@ -382,6 +382,13 @@
   (awhen (node-lvar node)
     (lvar-dynamic-extent it)))
 
+(defun use-good-for-dx-p (use)
+  (and (combination-p use)
+       (eq (combination-kind use) :known)
+       (awhen (fun-info-stack-allocate-result
+               (combination-fun-info use))
+         (funcall it use))))
+
 (declaim (inline block-to-be-deleted-p))
 (defun block-to-be-deleted-p (block)
   (or (block-delete-p block)
@@ -1425,7 +1432,7 @@
 ;;; of arguments changes, the transform must be prepared to return a
 ;;; lambda with a new lambda-list with the correct number of
 ;;; arguments.
-(defun extract-fun-args (lvar fun num-args)
+(defun splice-fun-args (lvar fun num-args)
   #!+sb-doc
   "If LVAR is a call to FUN with NUM-ARGS args, change those arguments
    to feed directly to the LVAR-DEST of LVAR, which must be a
@@ -1462,6 +1469,22 @@
           (flush-dest lvar)
           (values))))))
 
+(defun extract-fun-args (lvar fun num-args)
+  (declare (type lvar lvar)
+           (type (or symbol list) fun)
+           (type index num-args))
+  (let ((fun (if (listp fun) fun (list fun))))
+    (let ((inside (lvar-uses lvar)))
+      (unless (combination-p inside)
+        (give-up-ir1-transform))
+      (let ((inside-fun (combination-fun inside)))
+        (unless (member (lvar-fun-name inside-fun) fun)
+          (give-up-ir1-transform))
+        (let ((inside-args (combination-args inside)))
+          (unless (= (length inside-args) num-args)
+            (give-up-ir1-transform))
+          (values (lvar-fun-name inside-fun) inside-args))))))
+
 (defun flush-combination (combination)
   (declare (type combination combination))
   (flush-dest (combination-fun combination))