Inline local call trampolines on x86[-64]

[sbcl.git] / src / compiler / alpha / call.lisp

diff --git a/src/compiler/alpha/call.lisp b/src/compiler/alpha/call.lisp
index d62f5bd..2b6137f 100644 (file)
--- a/src/compiler/alpha/call.lisp
+++ b/src/compiler/alpha/call.lisp
@@ -123,6 +123,24 @@
       (when nfp
         (inst addq nfp (bytes-needed-for-non-descriptor-stack-frame) val)))))
 
+;;; 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)
   (:ignore copy-more-arg-follows)
@@ -392,6 +410,16 @@ default-value-8
               nvals)
   (:temporary (:scs (non-descriptor-reg)) temp))
 \f
+;;; This hook by the codegen 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
 
 ;;; Non-TR local call for a fixed number of values passed according to the