Eliminate "unused variable" warning from ARRAY-ROW-MAJOR-INDEX

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

diff --git a/src/compiler/gtn.lisp b/src/compiler/gtn.lisp
index 2752acc..af808d2 100644 (file)
--- a/src/compiler/gtn.lisp
+++ b/src/compiler/gtn.lisp
@@ -40,16 +40,35 @@
   (declare (type clambda fun))
   (dolist (var (lambda-vars fun))
     (when (leaf-refs var)
-      (let* ((type (if (lambda-var-indirect var)
-                       *backend-t-primitive-type*
+      (let* (ptype-info
+             (type (if (lambda-var-indirect var)
+                       (if (lambda-var-explicit-value-cell var)
+                           *backend-t-primitive-type*
+                           (or (first
+                                (setf ptype-info
+                                      (primitive-type-indirect-cell-type
+                                       (primitive-type (leaf-type var)))))
+                               *backend-t-primitive-type*))
                        (primitive-type (leaf-type var))))
-             (temp (make-normal-tn type))
+             (res (make-normal-tn type))
              (node (lambda-bind fun))
-             (res (if (or (and let-p (policy node (< debug 3)))
-                          (policy node (zerop debug))
-                          (policy node (= speed 3)))
-                      temp
-                      (physenv-debug-live-tn temp (lambda-physenv fun)))))
+             (debug-variable-p (not (or (and let-p (policy node (< debug 3)))
+                                        (policy node (zerop debug))
+                                        (policy node (= speed 3))))))
+        (cond
+         ((and (lambda-var-indirect var)
+               (not (lambda-var-explicit-value-cell var)))
+          ;; Force closed-over indirect LAMBDA-VARs without explicit
+          ;; VALUE-CELLs to the stack, and make sure that they are
+          ;; live over the dynamic contour of the physenv.
+          (setf (tn-sc res) (if ptype-info
+                                (second ptype-info)
+                                (sc-or-lose 'sb!vm::control-stack)))
+          (physenv-live-tn res (lambda-physenv fun)))
+
+         (debug-variable-p
+          (physenv-debug-live-tn res (lambda-physenv fun))))
+
         (setf (tn-leaf res) var)
         (setf (leaf-info var) res))))
   (values))