(when nfp
(inst add val nfp (bytes-needed-for-non-descriptor-stack-frame))))))
+;;; Accessing a slot from an earlier stack frame is definite hackery.
+(define-vop (ancestor-frame-ref)
+ (:args (frame-pointer :scs (descriptor-reg))
+ (variable-home-tn :load-if nil))
+ (:results (value :scs (descriptor-reg any-reg)))
+ (:policy :fast-safe)
+ (:generator 4
+ (aver (sc-is variable-home-tn control-stack))
+ (loadw value frame-pointer (tn-offset variable-home-tn))))
+(define-vop (ancestor-frame-set)
+ (:args (frame-pointer :scs (descriptor-reg))
+ (value :scs (descriptor-reg any-reg)))
+ (:results (variable-home-tn :load-if nil))
+ (:policy :fast-safe)
+ (:generator 4
+ (aver (sc-is variable-home-tn control-stack))
+ (storew value frame-pointer (tn-offset variable-home-tn))))
(define-vop (xep-allocate-frame)
(:info start-lab copy-more-arg-follows)
(:generator 1
;; Make sure the function is aligned, and drop a label pointing to this
;; function header.
- (align n-lowtag-bits)
+ (emit-alignment n-lowtag-bits)
(trace-table-entry trace-table-fun-prologue)
(emit-label start-lab)
;; Allocate function header.
nvals)
(:temporary (:scs (non-descriptor-reg)) temp))
+\f
+;;; This hook in the codegen pass lets us insert code before fall-thru entry
+;;; points, local-call entry points, and tail-call entry points. The default
+;;; does nothing.
+(defun emit-block-header (start-label trampoline-label fall-thru-p alignp)
+ (declare (ignore fall-thru-p alignp))
+ (when trampoline-label
+ (emit-label trampoline-label))
+ (emit-label start-label))
\f
;;;; Local call with unknown values convention return: