From: Stephen Adams <edu/mit/csail/zurich/adams>
Date: Thu, 6 Jul 1995 20:23:37 +0000 (+0000)
Subject: Removed dead code.  Profiled frequency distribution of forms and
X-Git-Tag: 20090517-FFI~6207
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=92bd4daadd6cfaed81bc9ae953fc001a4ac7c2c3;p=mit-scheme.git

Removed dead code.  Profiled frequency distribution of forms and
reordered dispacth accordingly (we might want to do this on a bigger
sample).
---

diff --git a/v8/src/compiler/midend/cleanup.scm b/v8/src/compiler/midend/cleanup.scm
index 7e4e3b56a..87abaabd0 100644
--- a/v8/src/compiler/midend/cleanup.scm
+++ b/v8/src/compiler/midend/cleanup.scm
@@ -1,6 +1,6 @@
 #| -*-Scheme-*-
 
-$Id: cleanup.scm,v 1.20 1995/07/04 05:47:49 adams Exp $
+$Id: cleanup.scm,v 1.21 1995/07/06 20:23:37 adams Exp $
 
 Copyright (c) 1994-1995 Massachusetts Institute of Technology
 
@@ -40,21 +40,6 @@ MIT in each case. |#
 (define (cleanup/top-level program)
   (cleanup/expr (cleanup/env/initial) program))
 
-;;(define-macro (define-cleanup-handler keyword bindings . body)
-;;  (let ((proc-name (symbol-append 'CLEANUP/ keyword)))
-;;    (call-with-values
-;;	(lambda () (%matchup (cdr bindings) '(handler env) '(cdr form)))
-;;      (lambda (names code)
-;;	`(DEFINE ,proc-name
-;;	   (LET ((HANDLER (LAMBDA ,(cons (car bindings) names) ,@body)))
-;;	     (NAMED-LAMBDA (,proc-name ENV FORM)
-;;	       (LET ((TRANSFORM-CODE (LAMBDA () ,code)))
-;;		 (LET ((INFO (CLEANUP/GET-DBG-INFO ENV FORM)))
-;;		   (LET ((CODE (TRANSFORM-CODE)))
-;;		     (IF INFO
-;;			 (CODE-REWRITE/REMEMBER* CODE INFO))
-;;		     CODE))))))))))
-
 (define-macro (define-cleanup-handler keyword bindings . body)
   (let ((proc-name (symbol-append 'CLEANUP/ keyword)))
     (call-with-values
@@ -657,16 +642,18 @@ MIT in each case. |#
 (define (cleanup/expr env expr)
   (if (not (pair? expr))
       (illegal expr))
+  ;;(sample/1 '(cleanup/dispatch histogram) (car expr))
+  ;; Dynamic Freqency: quote: 48%, call: 24%, lookup: 20%, let: 4%, ...
   (case (car expr)
     ((QUOTE)    (cleanup/quote env expr))
+    ((CALL)     (cleanup/call env expr))
     ((LOOKUP)   (cleanup/lookup env expr))
-    ((LAMBDA)   (cleanup/lambda env expr))
     ((LET)      (cleanup/let env expr))
-    ((DECLARE)  (cleanup/declare env expr))
-    ((CALL)     (cleanup/call env expr))
-    ((BEGIN)    (cleanup/begin env expr))
+    ((LAMBDA)   (cleanup/lambda env expr))
     ((IF)       (cleanup/if env expr))
     ((LETREC)   (cleanup/letrec env expr))
+    ((BEGIN)    (cleanup/begin env expr))
+    ((DECLARE)  (cleanup/declare env expr))
     (else
      (illegal expr))))