From: frief <frief@4a8a32a2-be11-0410-ad9d-d568d2c75423>
Date: Wed, 13 Jun 2007 19:22:56 +0000 (+0000)
Subject: * src/mcs51/peeph.def: added 177.i (mov from a is slightly cheaper)
X-Git-Url: https://git.gag.com/?a=commitdiff_plain;h=5b2a3ac70e9215274f6c1e41dd89c468459ff205;p=fw%2Fsdcc

* src/mcs51/peeph.def: added 177.i (mov from a is slightly cheaper)

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@4852 4a8a32a2-be11-0410-ad9d-d568d2c75423
---

diff --git a/ChangeLog b/ChangeLog
index b4823f36..adfcf091 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2007-06-13 Frieder Ferlemann <Frieder.Ferlemann AT web.de>
+
+	* src/mcs51/peeph.def: added 177.i (mov from a is slightly cheaper)
+
 2007-06-13 Raphael Neider <rneider AT web.de>
 
 	* src/SDCCmain.c: prevent NULL pointer dereference, avoid warning
diff --git a/src/mcs51/peeph.def b/src/mcs51/peeph.def
index d37d3b71..e21e5f24 100644
--- a/src/mcs51/peeph.def
+++ b/src/mcs51/peeph.def
@@ -1367,6 +1367,16 @@ replace {
 	mov	%1,a
 } if notVolatile %2
 
+// applies to f.e. testfwk.c
+replace {
+	mov	r%1,a
+	mov	ar%2,r%1
+} by {
+	mov	r%1,a
+	;	peephole 177.i	optimized mov sequence
+	mov	r%2,a
+}
+
 replace {
 	mov	a,%1
 	mov	b,a