From f8ebe92b9c9264ea1e38ec65e754f970d95faec8 Mon Sep 17 00:00:00 2001
From: spth <spth@4a8a32a2-be11-0410-ad9d-d568d2c75423>
Date: Tue, 30 Dec 2008 22:29:12 +0000
Subject: [PATCH] minor addition improvement

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@5311 4a8a32a2-be11-0410-ad9d-d568d2c75423
---
 ChangeLog             |  6 ++++++
 src/z80/gen.c         |  7 ++++++-
 src/z80/peeph-z80.def | 30 ++++++++++++++++++++++++++++++
 3 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 34d809ca..124f5e00 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-12-30 Philipp Klaus Krause <pkk AT spth.de>
+
+	* src/z80/gen.c,
+	  src/z80/peeph-z80.def:
+	  Minor addition improvement.
+
 2008-12-30 Raphael Neider <rneider AT web.de>
 
 	* as/link/hc08/lkelf.c, as/link/lkaomf51.c, as/link/lklibr.c,
diff --git a/src/z80/gen.c b/src/z80/gen.c
index 817acecc..82117185 100644
--- a/src/z80/gen.c
+++ b/src/z80/gen.c
@@ -3994,7 +3994,12 @@ genPlus (iCode * ic)
     {
       _moveA (aopGet (AOP (IC_LEFT (ic)), offset, FALSE));
       if (offset == 0)
-        emit2 ("add a,%s", aopGet (AOP (IC_RIGHT (ic)), offset, FALSE));
+      {
+        if(size == 0 && AOP_TYPE (IC_RIGHT (ic)) == AOP_LIT && ulFromVal (AOP (IC_RIGHT (ic))->aopu.aop_lit) == 1)
+	  emit2 ("inc a");
+        else
+          emit2 ("add a,%s", aopGet (AOP (IC_RIGHT (ic)), offset, FALSE));
+      }
       else
         emit2 ("adc a,%s", aopGet (AOP (IC_RIGHT (ic)), offset, FALSE));
       aopPut (AOP (IC_RESULT (ic)), "a", offset++);
diff --git a/src/z80/peeph-z80.def b/src/z80/peeph-z80.def
index ba83efff..6c258c09 100644
--- a/src/z80/peeph-z80.def
+++ b/src/z80/peeph-z80.def
@@ -799,6 +799,36 @@ replace restart {
 	//add	%3, %4
 }
 
+replace restart {
+	ld	l,%1 (ix)
+	ld	h,%2 (ix)
+	ld	a,(hl)
+	inc	a
+	ld	l,%1 (ix)
+	ld	h,%2 (ix)
+	ld	(hl),a
+} by {
+	ld	l,%1 (ix)
+	ld	h,%2 (ix)
+	inc	(hl)
+	; peephole 42c incremented in (hl) instead of going through a.
+} if notUsed('a')
+
+replace restart {
+	ld	l,%1 (ix)
+	ld	h,%2 (ix)
+	ld	a,(hl)
+	dec	a
+	ld	l,%1 (ix)
+	ld	h,%2 (ix)
+	ld	(hl),a
+} by {
+	ld	l,%1 (ix)
+	ld	h,%2 (ix)
+	dec	(hl)
+	; peephole 42d decremented in (hl) instead of going through a.
+} if notUsed('a')
+
 replace restart {
 	ld	%1,a
 	ld	a,%2
-- 
2.30.2