From c829570ca8686212a6ab50dced1e65abe2d12ba1 Mon Sep 17 00:00:00 2001
From: frief <frief@4a8a32a2-be11-0410-ad9d-d568d2c75423>
Date: Fri, 19 Nov 2004 09:06:39 +0000
Subject: [PATCH] added peepholes 3.d-g and 177.g,h provided by anonymous in
 RFE #1067986, thanks

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@3577 4a8a32a2-be11-0410-ad9d-d568d2c75423
---
 ChangeLog           |  7 +++-
 src/mcs51/peeph.def | 78 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 84 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index b61e99b0..c36dcd32 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2004-11-19 Frieder Ferlemann <Frieder.Ferlemann AT web.de>
+
+	* src/mcs51/peeph.def: added peepholes 3.d-g and 177.g,h provided
+	  by anonymous in RFE #1067986, thanks
+
 2004-11-18 Maarten Brock <sourceforge.brock AT dse.nl>
 
 	* .version: bumped version to 2.4.7
@@ -42,7 +47,7 @@
 	* support/regression/ports/ucz80/spec.mk: use include and lib files from
 	  built version of sdcc instead of installed version
 
-2004-11-11 Maarten Brock <sourceforge.brock AT dse.nl>
+2004-11-14 Maarten Brock <sourceforge.brock AT dse.nl>
 
 	* src/mcs51/gen.c (toBoolean): fixed bug 1065458
 	* device/lib/Makefile.in: z80 uses printf_large.c, sprintf.c and
diff --git a/src/mcs51/peeph.def b/src/mcs51/peeph.def
index b8f09739..fb786d95 100644
--- a/src/mcs51/peeph.def
+++ b/src/mcs51/peeph.def
@@ -57,6 +57,66 @@ replace {
 	mov	a,%3
 }
 
+replace {
+	clr	a
+	mov	%1,a
+	mov	%2,a
+	clr	a
+} by {
+	clr	a
+	mov	%1,a
+	mov	%2,a
+	;	Peephole 3.d	removed redundant clr
+}
+
+replace {
+	clr	a
+	mov	%1,a
+	mov	%2,a
+	mov	%3,a
+	clr	a
+} by {
+	clr	a
+	mov	%1,a
+	mov	%2,a
+	mov	%3,a
+	;	Peephole 3.e	removed redundant clr
+}
+
+replace {
+	clr	a
+	mov	%1,a
+	mov	%2,a
+	mov	%3,a
+	mov	%4,a
+	clr	a
+} by {
+	clr	a
+	mov	%1,a
+	mov	%2,a
+	mov	%3,a
+	mov	%4,a
+	;	Peephole 3.f	removed redundant clr
+}
+
+replace {
+	clr	a
+	mov	%1,a
+	mov	%2,a
+	mov	%3,a
+	mov	%4,a
+	mov	%5,a
+	clr	a
+} by {
+	clr	a
+	mov	%1,a
+	mov	%2,a
+	mov	%3,a
+	mov	%4,a
+	mov	%5,a
+	;	Peephole 3.g	removed redundant clr
+}
+
 replace {
 	mov	%1,a
 	mov	dptr,#%2
@@ -1050,6 +1110,24 @@ replace {
 	mov	r%1,%3
 } if notVolatile %2
 
+replace {
+	mov	%1,%2
+	mov	a,%1
+} by {
+	;	peephole 177.g	optimized mov sequence
+	mov	a,%2
+	mov	%1,a
+} if notVolatile %1
+
+replace {
+	mov	%1,%2
+	mov	a,%2
+} by {
+	;	peephole 177.h	optimized mov sequence
+	mov	a,%2
+	mov	%1,a
+} if notVolatile %2
+
 replace {
 	mov	a,%1
 	mov	b,a
-- 
2.47.2