1.0.10.5: dynamic-extent CONS

[sbcl.git] / src / compiler / x86-64 / alloc.lisp

diff --git a/src/compiler/x86-64/alloc.lisp b/src/compiler/x86-64/alloc.lisp
index 690e34b..c7b7de2 100644 (file)
--- a/src/compiler/x86-64/alloc.lisp
+++ b/src/compiler/x86-64/alloc.lisp
@@ -11,7 +11,9 @@
 
 (in-package "SB!VM")
 \f
-;;;; LIST and LIST*
+;;;; CONS, LIST and LIST*
+(defoptimizer (cons stack-allocate-result) ((&rest args))
+  t)
 (defoptimizer (list stack-allocate-result) ((&rest args))
   (not (null args)))
 (defoptimizer (list* stack-allocate-result) ((&rest args))
@@ -124,7 +126,7 @@
     (inst lea result (make-ea :byte :base result :disp other-pointer-lowtag))
     (storew type result 0 other-pointer-lowtag)
     (storew length result vector-length-slot other-pointer-lowtag)
-    (inst xor zero zero)
+    (zeroize zero)
     (inst rep)
     (inst stos zero)))
 
@@ -225,10 +227,11 @@
 (define-vop (make-value-cell)
   (:args (value :scs (descriptor-reg any-reg) :to :result))
   (:results (result :scs (descriptor-reg) :from :eval))
+  (:info stack-allocate-p)
   (:node-var node)
   (:generator 10
     (with-fixed-allocation
-        (result value-cell-header-widetag value-cell-size node)
+        (result value-cell-header-widetag value-cell-size node stack-allocate-p)
       (storew value result value-cell-value-slot other-pointer-lowtag))))
 \f
 ;;;; automatic allocators for primitive objects
@@ -247,13 +250,13 @@
 
 (define-vop (fixed-alloc)
   (:args)
-  (:info name words type lowtag)
+  (:info name words type lowtag stack-allocate-p)
   (:ignore name)
   (:results (result :scs (descriptor-reg)))
   (:node-var node)
   (:generator 50
     (pseudo-atomic
-     (allocation result (pad-data-block words) node)
+     (allocation result (pad-data-block words) node stack-allocate-p)
      (inst lea result (make-ea :byte :base result :disp lowtag))
      (when type
        (storew (logior (ash (1- words) n-widetag-bits) type)